EP1238035A1 - Adhesives comprising linear, isotactic polymers - Google Patents
Adhesives comprising linear, isotactic polymersInfo
- Publication number
- EP1238035A1 EP1238035A1 EP00968576A EP00968576A EP1238035A1 EP 1238035 A1 EP1238035 A1 EP 1238035A1 EP 00968576 A EP00968576 A EP 00968576A EP 00968576 A EP00968576 A EP 00968576A EP 1238035 A1 EP1238035 A1 EP 1238035A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- adhesive
- present
- adhesives
- homopolymer
- less
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
- 230000001070 adhesive effect Effects 0.000 title claims abstract description 92
- 239000000853 adhesive Substances 0.000 title claims abstract description 90
- 229920001580 isotactic polymer Polymers 0.000 title description 6
- 239000000463 material Substances 0.000 claims abstract description 12
- 229920001519 homopolymer Polymers 0.000 claims description 20
- 238000000034 method Methods 0.000 claims description 9
- 238000000576 coating method Methods 0.000 claims description 8
- 239000004743 Polypropylene Substances 0.000 claims description 6
- 239000011248 coating agent Substances 0.000 claims description 6
- 239000007788 liquid Substances 0.000 claims description 5
- -1 polypropylene Polymers 0.000 claims description 5
- 229920001155 polypropylene Polymers 0.000 claims description 5
- 239000002904 solvent Substances 0.000 claims description 5
- 238000010276 construction Methods 0.000 claims description 4
- 239000011324 bead Substances 0.000 claims description 3
- 239000012943 hotmelt Substances 0.000 claims description 3
- 239000000843 powder Substances 0.000 claims description 3
- 239000007921 spray Substances 0.000 claims description 3
- 239000002159 nanocrystal Substances 0.000 abstract description 2
- 229920000642 polymer Polymers 0.000 description 23
- 239000000178 monomer Substances 0.000 description 8
- 238000013459 approach Methods 0.000 description 5
- 238000002844 melting Methods 0.000 description 5
- 230000008018 melting Effects 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 3
- 229920001577 copolymer Polymers 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 125000005842 heteroatom Chemical group 0.000 description 3
- 238000005304 joining Methods 0.000 description 3
- 239000000155 melt Substances 0.000 description 3
- 238000002156 mixing Methods 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- QQONPFPTGQHPMA-UHFFFAOYSA-N Propene Chemical compound CC=C QQONPFPTGQHPMA-UHFFFAOYSA-N 0.000 description 2
- 239000003054 catalyst Substances 0.000 description 2
- 239000000460 chlorine Substances 0.000 description 2
- 229910052801 chlorine Inorganic materials 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 235000013305 food Nutrition 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 229920000098 polyolefin Polymers 0.000 description 2
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 description 1
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 1
- 241000411998 Gliricidia Species 0.000 description 1
- 235000009664 Gliricidia sepium Nutrition 0.000 description 1
- 229920005372 Plexiglas® Polymers 0.000 description 1
- 230000002745 absorbent Effects 0.000 description 1
- 239000002250 absorbent Substances 0.000 description 1
- 239000012190 activator Substances 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 229920001585 atactic polymer Polymers 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 229910052796 boron Inorganic materials 0.000 description 1
- 239000013590 bulk material Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 125000001309 chloro group Chemical group Cl* 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000007334 copolymerization reaction Methods 0.000 description 1
- 239000002178 crystalline material Substances 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
- 230000008025 crystallization Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000005670 electromagnetic radiation Effects 0.000 description 1
- 230000001747 exhibiting effect Effects 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 230000009477 glass transition Effects 0.000 description 1
- 239000012948 isocyanate Substances 0.000 description 1
- 150000002513 isocyanates Chemical class 0.000 description 1
- 230000018984 mastication Effects 0.000 description 1
- 238000010077 mastication Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000004137 mechanical activation Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 231100000252 nontoxic Toxicity 0.000 description 1
- 230000003000 nontoxic effect Effects 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000005022 packaging material Substances 0.000 description 1
- 238000005191 phase separation Methods 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- 239000004926 polymethyl methacrylate Substances 0.000 description 1
- 239000004810 polytetrafluoroethylene Substances 0.000 description 1
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 239000000454 talc Substances 0.000 description 1
- 229910052623 talc Inorganic materials 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
- 231100000419 toxicity Toxicity 0.000 description 1
- 230000001988 toxicity Effects 0.000 description 1
- 231100000925 very toxic Toxicity 0.000 description 1
- 239000002023 wood Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J123/00—Adhesives based on homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Adhesives based on derivatives of such polymers
- C09J123/02—Adhesives based on homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Adhesives based on derivatives of such polymers not modified by chemical after-treatment
- C09J123/10—Homopolymers or copolymers of propene
- C09J123/12—Polypropene
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J123/00—Adhesives based on homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Adhesives based on derivatives of such polymers
- C09J123/02—Adhesives based on homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Adhesives based on derivatives of such polymers not modified by chemical after-treatment
- C09J123/10—Homopolymers or copolymers of propene
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J9/00—Adhesives characterised by their physical nature or the effects produced, e.g. glue sticks
Definitions
- the adhesive of the present invention has been found to be able to adhere to polished surfaces such as metal plates, PTFE coated surfaces, polymeric surfaces and the like.
- the adhesive of the present invention is also suitable for adhering to mammalian tissue such as epidermal tissue.
- melting point of around 50°C can be achieved. Such melting point can be used for deactivating the adhesive where this is desired. Heating the adhesive to its melting point will cause the adhesive to flow and hence in can be peeled off at very low peel forces.
- the adhesives of the present invention may for example be activated by electromagnetic radiation such as infrared, UV or visible radiation, by ultrasonic wave and the like.
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Adhesives Or Adhesive Processes (AREA)
- Application Of Or Painting With Fluid Materials (AREA)
Abstract
The present invention relates to adhesives comprising polymeric material wherein the structure of the polymeric material contains elastic amorphous areas of nano scale-size reinforced with self arranged crystalline domains of nano-crystals.
Description
ADHESIVES COMPRISING LINEAR, ISOTACTIC POLYMERS
FIELD OF THE INVENTION
The present invention relates to adhesives used for example in assembling articles. Specifically, the present invention relates to elastic adhesives.
BACKGROUND
Adhesives and in particular adhesives comprising olefinic polymers are well known in the art and enjoy widespread usage throughout the industry. Typical areas of application of such adhesive include hygienic articles and in particular disposable absorbent articles, packaging materials, automotive parts, and the like.
Adhesives made from commonly used polyolefins such as PP, PE, PS, PIB have a number of useful properties. They are bio-compatible and food compatible, chemically stabile, inert, non toxic materials. However, most of them have poor mechanical properties including insufficient strength/tear resistance, insufficient stretchability/elasticity and the like.
Other adhesives, such as PL) based adhesives, have also been widely used for example because of their elastic properties. PU adhesives however have the disadvantage that they are polymerized from the very toxic monomer isocyanate and hence can not be used for many application due to their inherent toxicity caused by residual monomer content.
Several approaches have been proposed in the prior art to provide elastic properties to such adhesives. The most commonly used approach is based on
changing the chemical structure of the polymer by introducing hinged joints/moieties into the main chain of the polymer. These side groups or side chains provide more flexibility to the polymeric backbone preventing crystallization of polymer, lowering the glass transition temperature (Tg) and improving the elasticity of the resulting material. Usually, the hinge groups contain heteroatoms providing flexibility such as oxygen, nitrogen or chlorine placed into the main chain or into bulky side groups. Another approach is mastication of the polymer by blending with special plasticizing agents. Both approaches, however, require heteroatoms to be introduced into the molecule or into the bulk of the coating material.
The third approach proposed in the prior art to provide elastic properties to such adhesives, which is more close to the present invention, is to exploit the formation of hetero-phases which reinforce the bulk material by forming a physical net. To do this the block-co-polymerization of two or more different monomers has been used leading to polymeric backbones comprising blocks with different Tg. This results in micro-phase separation in the bulk with formation of reinforcing crystalline domains of one co-polymer linked with each other by flexible chains of the second co-polymer.
In essence, conventional adhesives carry a wide variety of inherent disadvantages including but not being limited to insufficient strength/tear resistance, insufficient stretchability/elasticity, not being bio-compatible, not being food compatible, comprising heteroatoms such as chlorine and hence leading to toxic residues when burnt, and the like.
It is an object of the present invention to provide adhesives which overcome the disadvantages of the prior art adhesives.
It is an further object of the present invention to provide articles which comprise elastic adhesives.
It is an further object of the present invention to provide a method for manufacturing adhesive of the present invention.
SUMMARY OF THE INVENTION
The present invention provides an article comprising a first element and a second element being joined to said first element by means of an adhesive. The article is characterized in that said adhesive comprises said adhesive comprises a polyolefinic homopolymer having an isotacticity of less than 60% of [mmmm] pentad concentration.
The present invention further provides a method for providing the aforementioned adhesive coating comprising a step of applying an adhesive coating selected from the group of hot melt, spray, powder melt, extruded bead, liquid, solvent based, pressure sensitive, and combinations thereof.
DETAILED DESCRIPTION OF THE INVENTION
The present invention provides an article comprising a first element and a second element being joined to said first element by means of an elastic adhesive comprising a polyolefinic homopolymer.
The term "polyolefinic homopolymer" as used herein refers to those polyolefins which comprise only one phase of molecules all of which exhibiting a similar stereochemical configuration. For example, blends of atactic and isotactic polymers where the two phases have polymerized simultaneously are excluded when this term is used. The term homopolymer includes copolymers where all molecules exhibit a similar stereochemical configuration.
The polyolefinic homopolymer of the present invention may comprise linear isotactic polymers having a structure of one or several C3 to C20 olefinic monomers, having an isotacticity of less than 60%, preferably less than 50%,
more preferably less than 40%, and most preferably less than 30% of [mmmm] pentad concentration, and having an isotacticity of more 8%, preferably more than 10%, more preferably more than 12%, and most preferably more than 15% of [mmmm] pentad concentration. Preferably, the polyolefinic homopolymer is polypropylene.
The isotacticity of the homopolymers may be reduced compared to the isotactic polypropylenes of the prior art due to a statistic distribution of stereoscopic errors in the polymer chain. The term "stereoscopic error" refers to a stereoscopic sequence characterized by a [mrrm] pentad. In this case, the central monomer has a stereo configuration opposed to the other four monomers in this pentad. The [mrrm] pentad concentration of this polymer therefore is above the statistical probability of p2 (1-p)2 where p=[m] and hence l-p=[r] and p4=[mmmm]. Preferably, the pentad concentration is at least [p (l-p)]q p (1-p) with q being 0.8, more preferably q being 0.6, yet more preferably q being 0.4, yet more preferably q being 0.2, most preferably q being 0.1.
In some embodiments of the homopolymer and in particular in those embodiments where the crystallinity is reduced by means of single stereo errors, a low content of atactic sequences has proven beneficial to the properties of the adhesive of the present invention. Preferably, the [rmrm] pentad concentration is below 6%, more preferably below 5%, yet more preferably below 4%, yet more preferably below 3%, most preferably below 2.5%.
In some embodiments of the homopolymer and in particular in those embodiments where the crystallinity is reduced by means of single stereo errors, a low content of syndiotactic sequences has proven beneficial to the properties of the adhesive of the present invention. Preferably, the [rrrr] pentad concentration is below 6%, more preferably below 5%, yet more preferably below 4%, yet more preferably below 3%, most preferably below 2.5%.
Alternatively, the homopolymer of the present invention may include sequences of atactic and isotactic blocks of polymer.
Preferably, the mean molecular weight Mw of the polymer is above 100000 g/mol, more preferably above 200000 g/mol, yet more preferably above 250000 g/mol, yet more preferably more than 300000 g/mol, most preferably more than 350000 g/mol. Higher molecular weights are particularly beneficial where elastic and tear resistance properties of the adhesive material desired.
For some applications such as adhesion to polymers and mammalian tissue, it is preferred that the molecular weight is below 200000g/mol, more preferably below 175000g/mol, most preferably below 150000g/mol.
The glass temperature Tg is between -50 and +30 °C. Preferably the glass temperature is below 10°C, more preferably below 5°C, yet more preferably below 0°C, most preferably below -6°C. The melt temperature of the polymer is obtained after heating the sample 150°C and subsequently cooling the polymer to -50°C.
Without wishing to be bound by this theory, the polyolefinic polymers exhibit a semi-crystalline structure. The structure contains elastic amorphous areas of nano-scale-size reinforced with self arranged crystalline domains of nano-crystals. The formation of brittle macro-crystalline material from the polymer is achieved by introducing the defects into the polymeric backbone. Isolated monomer units with opposite stereo configuration have been used as the defects, i.e. single stereo errors.
Suitable polymers and a process for manufacturing such polymers are described in PCT patent application EP99/02379 incorporated herein by reference. A catalyst combination suitable for the preparation of such polymers is described in PCT patent application EP99/02378 incorporated herein by reference. Preferably,
the process of PCT patent application EP99/02378 is carried out by temperatures of less than 30°C, more preferably less than 25°C, yet more preferably less than 20°C, most preferably less than 15°C to increase the molecular weight of the resulting polymer. In order to increase the molecular weight, the polymerization is preferably carried out in liquid monomer such as in liquid propene. If it is desired to increase the molecular weight, the catalyst is preferably used in combination with the boron activators mentioned in PCT patent application EP99/02378.
Other suitable polymers and a process for manufacturing such polymers is described in WO99/20664 incorporated herein by reference.
In the prior art, a wide variety of suitable techniques to provide adhesive coatings are known such as applying an adhesive in a form including but not being limited to hot melt, spray, powder melt, extruded bead, liquid, solvent based, pressure sensitive, meltblown fibers and combinations thereof. The aforementioned methods for providing adhesive coatings all have specific advantages which are known to the skilled person. Hence, the skilled person will be able to select a suitable method for providing an adhesive coating of the present invention depending on the specific requirement of the respective application of the adhesive.
The adhesive of the present invention has been found to be able to adhere to polished surfaces such as metal plates, PTFE coated surfaces, polymeric surfaces and the like. The adhesive of the present invention is also suitable for adhering to mammalian tissue such as epidermal tissue.
Preferably, the adhesion force between the two elements of the article of the present invention is adjusted to be at least 5 Newton per centimeter, more preferably at least lON/cm, yet more preferably 20N/cm, most preferably 40N/cm. Of course, if lower peel forces are desired the adhesive properties such
as molecular weight can be changed accordingly. Alternatively, the same peel force requirement apply when surfaces are attached to each other. The peel forces are measured with respect to the specific surfaces they are used on.
The adhesive of the present invention has further been found to only release relative small amounts of odor even in the melt state. In particular, it is possible to manufacture the adhesive of the present invention without the use of solvents and hence, in some embodiments of the present invention, the adhesive does contain solvents.
In some embodiments and in particular in those embodiments having a high molecular weight, the adhesive of the present invention has been found to exhibit increased temperature stability compared to prior art adhesives. This is partly due to the fact that for the adhesives of the present invention a homopolymer is used and is partly due to the high molecular weight of the homopolymer. Preferably, the adhesive material of the present invention has a melting point of at least 100°C, more preferably of at least 110°C, more preferably of at least 120°C, most preferably of at least 130°C. The melt temperature of the polymer is obtained after heating the sample 150°C and subsequently cooling the polymer to -50°C. If desired, higher melting point may be achieved my blending the homopolymer for example with conventional isotactic polymer such as polypropylene.
Alternatively and in particular in those embodiments in which the adhesive has a relatively low molecular weight, melting point of around 50°C can be achieved. Such melting point can be used for deactivating the adhesive where this is desired. Heating the adhesive to its melting point will cause the adhesive to flow and hence in can be peeled off at very low peel forces.
The adhesive of the present invention has been found to be stretchable as well as elastic. The stretchability of the adhesive versus its elastic behavior can be
adjusted by means of the tacticity of the homopolymer of the present invention. The adhesive material of the present invention has been found to be stretchable without tearing to at least 500% of its original length, more preferably 1000% of its original length, yet more preferably to at least 1500% of its original length, most preferably to at least 2000% of its original length. In addition, the adhesive material of the present invention preferably recovers within 10 minutes after being stretched and held for 1 minute to 500% of its original length back to less than 300% its original length, preferably less than 200% its original length, most preferably less than 150% of its original length. In addition, the adhesive of the present invention has been found to exhibit a low compressive set. The adhesive of the present invention recovers within 10 minutes after a compression to 50% of its original thickness for 1 minute to at least 60% of its original thickness, more preferably at least 70% of its original thickness, yet more preferably to at least 80% of its original thickness, yet more preferably to at least 90% of its original thickness, most preferably to at least 95% of its original thickness. The compressibility of the adhesive of the present invention can be adjusted by increasing the tacticity of the homopolymer or by blending the low tacticity homopolymer with conventional isotactic polymer such as polypropylene.
Without wishing to be bound by this theory, it is believed that the rheological properties of the adhesive of the present invention, i.e. the storage or elastic modulus G' and the viscosity modulus G", are indicative of its creep and its peel/quick stick behavior respectively during use. The G' and G" values at low frequencies (approximately O.Olrad/s to lrad/s) and at high frequencies (lOOrad/s to lOOOrad/s) are believed to relate to the behavior of the adhesive at application and at removal respectively. It is well known in the art, to measure G' and G" over a broad range of frequencies, for example a Rheometric Scientific RS-5 rheometer could be used. The measurement of G' and G" should be carried out at the desired usage temperature, i.e. room temperature of 25°C for most applications or 37°C for body related applications.
Preferably, the adhesive of the present invention has a viscosity modulus G"(lrad/s) of less than 30000 Pa, more preferably less than 25000 Pa, yet more preferably less than 20000 Pa, most preferably less than 15000 Pa. Without wishing to be bound by this theory, it is believed that these values of G"(lrad/s) are indicative of the adhesive not flowing away when the adhesive is applied to the surface.
Preferably, the adhesive of the present invention has a viscosity modulus G"(lrad/s) of at least 500 Pa, more preferably at least 1000 Pa, yet more preferably at least 1500 Pa, most preferably at least 2000 Pa. Without wishing to be bound by this theory, it is believed that these values of G"(lrad/s) are indicative of the adhesive being able to conform to the topology of the surface it is applied to.
Preferably, the adhesive of the present invention has a viscosity modulus G"(100rad/s) of less than 30000 Pa, more preferably less than 20000 Pa, yet more preferably less than 15000 Pa, most preferably less than 10000 Pa. Without wishing to be bound by this theory, it is believed that these values of G"(100rad/s) are indicative of the adhesive not flowing away upon removal from the surface.
Preferably, the adhesive of the present invention has a viscosity modulus G"(100rad/s) of at least 1000 Pa, more preferably at least 2000 Pa, yet more preferably at least 3000 Pa, most preferably at least 4000 Pa. Without wishing to be bound by this theory, it is believed that these values of G"(100rad/s) are indicative of the adhesive not breaking upon removal from the surface.
Preferably, the adhesive of the present invention has a viscosity modulus G'(lrad/s) of less than 30000 Pa, more preferably less than 25000 Pa, yet more preferably less than 20000 Pa, most preferably less than 15000 Pa. Preferably, the adhesive of the present invention has a viscosity modulus G'(lrad/s) of at
least 500 Pa, more preferably at least 1000 Pa, yet more preferably at least 1500 Pa, most preferably at least 2000 Pa. Without wishing to be bound by this theory, it is believed that these values of G'(lrad/s) are indicative of the adhesive maintaining its elastic properties when the adhesive is applied to the surface.
Preferably, the adhesive of the present invention has a viscosity modulus G'(100rad/s) of less than 30000 Pa, more preferably less than 25000 Pa, yet more preferably less than 20000 Pa, most preferably less than 15000 Pa. Preferably, the adhesive of the present invention has a viscosity modulus G'(100rad/s) of at least 2000 Pa, more preferably at least 3000 Pa, yet more preferably at least 4000 Pa, most preferably at least 5000 Pa. Without wishing to be bound by this theory, it is believed that these values of G'(100rad/s) are indicative of the adhesive maintaining its elastic properties upon removal from the surface.
Preferably, the ratio of G'(l rad/s) / G"(l rad/s) is in the range of 1 to 30. This is believed to be indicative of the flow behavior of the adhesive of the present invention during application of the adhesive to the surface of the substrate.
Of course, if other values of G' and G" are desired, the adhesive properties can be adjusted accordingly within the above given limits.
The adhesive according to the present invention may also be used as a construction element in an article. Such articles include but are not limited to toys, furniture, clothing, shoes, sport equipment, complex constructions such as buildings, cars, household appliances, and the like. Having regard to the specific advantages of the polymers used for the articles of the present invention, it will be readily apparent to the skilled practitioner to apply and to optionally modify the adhesives according to the present invention as construction elements in the above and similar articles.
The adhesives of the present invention are suitable for joining non-sealable polyolefinic surfaces, for joining and adhering to wood surfaces, for joining and adhering to Plexiglas surfaces and the like.
The adhesives are suitable for applications where the adhesive needs to be stretchable, i.e. where the bonded surfaces of the first element and the second element should be allowed to make small movements relative to each other. For example, the adhesive of the present invention may be used as a binder resin for nonwoven web materials. The adhesive of the present invention will allow for further processing of such bonded nonwoven web materials such as for example mechanical activation such as by ring rolling.
The adhesives of the present invention may for example be activated by electromagnetic radiation such as infrared, UV or visible radiation, by ultrasonic wave and the like.
Additives such as those known in the art may be added to the adhesive of the present invention. For example, the addition of talc is suitable for modifying the adhesive properties.
Claims
1. An article comprising a first element and a second element being joined to said first element by means of an adhesive characterized in that said adhesive comprises a polyolefinic homopolymer having an isotacticity of less than 60% of [mmmm] pentad concentration.
2. An article according to claim 1 wherein said homopolymer has a molecular weight of at least lOOOOOg/mol.
3. An article according to Claim 1 wherein said adhesive is stretchable.
4. An article according to Claim 2 wherein said adhesive is elastically expandable.
5. A polymeric adhesive according to any of the preceding claims wherein said homopolymer is polypropylene.
6. An article comprising according to any of the preceding claims wherein said adhesive is deployed as a construction element.
7. A method for providing an adhesive coating comprising a step of applying an adhesive coating selected from the group of hot melt, spray, powder melt, extruded bead, liquid, solvent based, pressure sensitive, and combinations thereof characterized in that said polymeric material comprises a polyolefinic homopolymer having an isotacticity of less than 60% of [mmmm] pentad concentration.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP00968576A EP1238035A1 (en) | 1999-10-08 | 2000-10-02 | Adhesives comprising linear, isotactic polymers |
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP99120170 | 1999-10-08 | ||
| EP99120170 | 1999-10-08 | ||
| EP00968576A EP1238035A1 (en) | 1999-10-08 | 2000-10-02 | Adhesives comprising linear, isotactic polymers |
| PCT/US2000/027137 WO2001027213A1 (en) | 1999-10-08 | 2000-10-02 | Adhesives comprising linear, isotactic polymers |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP1238035A1 true EP1238035A1 (en) | 2002-09-11 |
Family
ID=8239167
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP00968576A Withdrawn EP1238035A1 (en) | 1999-10-08 | 2000-10-02 | Adhesives comprising linear, isotactic polymers |
Country Status (9)
| Country | Link |
|---|---|
| EP (1) | EP1238035A1 (en) |
| JP (1) | JP2003511541A (en) |
| KR (1) | KR100497591B1 (en) |
| CN (1) | CN1179013C (en) |
| AU (1) | AU776090B2 (en) |
| BR (1) | BR0014609A (en) |
| CA (1) | CA2386904A1 (en) |
| MX (1) | MXPA02003509A (en) |
| WO (1) | WO2001027213A1 (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7223822B2 (en) | 2002-10-15 | 2007-05-29 | Exxonmobil Chemical Patents Inc. | Multiple catalyst and reactor system for olefin polymerization and polymers produced therefrom |
| US7294681B2 (en) | 2002-10-15 | 2007-11-13 | Exxonmobil Chemical Patents Inc. | Mutliple catalyst system for olefin polymerization and polymers produced therefrom |
| US7541402B2 (en) | 2002-10-15 | 2009-06-02 | Exxonmobil Chemical Patents Inc. | Blend functionalized polyolefin adhesive |
| US7550528B2 (en) | 2002-10-15 | 2009-06-23 | Exxonmobil Chemical Patents Inc. | Functionalized olefin polymers |
| US7700707B2 (en) | 2002-10-15 | 2010-04-20 | Exxonmobil Chemical Patents Inc. | Polyolefin adhesive compositions and articles made therefrom |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100577702C (en) * | 2003-07-14 | 2010-01-06 | 三菱化学株式会社 | Propylene Block Copolymer |
| US20070172649A1 (en) * | 2004-03-19 | 2007-07-26 | Mitsui Chemicals, Inc. | Adhesive material, pressure sensitive adhesive film and method of use thereof |
| JP5537509B2 (en) * | 2004-12-07 | 2014-07-02 | 三井化学株式会社 | Adhesive film |
| EP2540272A1 (en) * | 2011-06-27 | 2013-01-02 | Magis S.P.A. | Multilayer material for a diaper landing zone and production method |
| US20150252226A1 (en) * | 2012-09-18 | 2015-09-10 | Idemitsu Kosan Co., Ltd. | Functionalized alpha-olefin polymer, as well as cured composition and cured article using same |
| EP4007792A4 (en) * | 2019-08-01 | 2023-08-09 | Bostik, Inc. | HOT-MELT ADHESIVES CONTAINING POLYOLEFINS |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| WO1995010575A1 (en) * | 1993-10-13 | 1995-04-20 | Exxon Chemical Patents Inc. | Adhesives from low molecular weight polypropylene |
| JPH11501342A (en) * | 1995-03-01 | 1999-02-02 | ミネソタ マイニング アンド マニュファクチャリング カンパニー | Tris (pentafluorophenyl) borate complexes and catalysts derived therefrom |
| US6265512B1 (en) * | 1997-10-23 | 2001-07-24 | 3M Innovative Company | Elastic polypropylenes and catalysts for their manufacture |
| DE19816154A1 (en) * | 1998-04-09 | 1999-10-21 | Bernhard Rieger | Linear isotactic polymers, processes for their production and their use and a catalyst combination |
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2000
- 2000-10-02 EP EP00968576A patent/EP1238035A1/en not_active Withdrawn
- 2000-10-02 BR BR0014609-9A patent/BR0014609A/en not_active IP Right Cessation
- 2000-10-02 AU AU78469/00A patent/AU776090B2/en not_active Ceased
- 2000-10-02 CN CNB008140448A patent/CN1179013C/en not_active Expired - Fee Related
- 2000-10-02 CA CA002386904A patent/CA2386904A1/en not_active Abandoned
- 2000-10-02 KR KR10-2002-7004491A patent/KR100497591B1/en not_active Expired - Fee Related
- 2000-10-02 MX MXPA02003509A patent/MXPA02003509A/en not_active Application Discontinuation
- 2000-10-02 JP JP2001530419A patent/JP2003511541A/en not_active Withdrawn
- 2000-10-02 WO PCT/US2000/027137 patent/WO2001027213A1/en not_active Ceased
Non-Patent Citations (1)
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| See references of WO0127213A1 * |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7223822B2 (en) | 2002-10-15 | 2007-05-29 | Exxonmobil Chemical Patents Inc. | Multiple catalyst and reactor system for olefin polymerization and polymers produced therefrom |
| US7294681B2 (en) | 2002-10-15 | 2007-11-13 | Exxonmobil Chemical Patents Inc. | Mutliple catalyst system for olefin polymerization and polymers produced therefrom |
| US7524910B2 (en) | 2002-10-15 | 2009-04-28 | Exxonmobil Chemical Patents Inc. | Polyolefin adhesive compositions and articles made therefrom |
| US7541402B2 (en) | 2002-10-15 | 2009-06-02 | Exxonmobil Chemical Patents Inc. | Blend functionalized polyolefin adhesive |
| US7550528B2 (en) | 2002-10-15 | 2009-06-23 | Exxonmobil Chemical Patents Inc. | Functionalized olefin polymers |
| US7700707B2 (en) | 2002-10-15 | 2010-04-20 | Exxonmobil Chemical Patents Inc. | Polyolefin adhesive compositions and articles made therefrom |
| US8071687B2 (en) | 2002-10-15 | 2011-12-06 | Exxonmobil Chemical Patents Inc. | Multiple catalyst system for olefin polymerization and polymers produced therefrom |
| US8088867B2 (en) | 2002-10-15 | 2012-01-03 | Exxonmobil Chemical Patents Inc. | Multiple catalyst system for olefin polymerization and polymers produced therefrom |
| US8957159B2 (en) | 2002-10-15 | 2015-02-17 | Exxonmobil Chemical Patents Inc. | Multiple catalyst system for olefin polymerization and polymers produced therefrom |
Also Published As
| Publication number | Publication date |
|---|---|
| CA2386904A1 (en) | 2001-04-19 |
| CN1378580A (en) | 2002-11-06 |
| AU7846900A (en) | 2001-04-23 |
| CN1179013C (en) | 2004-12-08 |
| JP2003511541A (en) | 2003-03-25 |
| BR0014609A (en) | 2002-06-11 |
| KR100497591B1 (en) | 2005-07-01 |
| KR20020035897A (en) | 2002-05-15 |
| AU776090B2 (en) | 2004-08-26 |
| MXPA02003509A (en) | 2002-08-20 |
| WO2001027213A1 (en) | 2001-04-19 |
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