WO2018219961A1 - Hitzehärtende epoxidharzklebstoffe - Google Patents
Hitzehärtende epoxidharzklebstoffe Download PDFInfo
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- WO2018219961A1 WO2018219961A1 PCT/EP2018/064090 EP2018064090W WO2018219961A1 WO 2018219961 A1 WO2018219961 A1 WO 2018219961A1 EP 2018064090 W EP2018064090 W EP 2018064090W WO 2018219961 A1 WO2018219961 A1 WO 2018219961A1
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- epoxy resin
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G59/00—Polycondensates containing more than one epoxy group per molecule; Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups
- C08G59/18—Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups ; e.g. general methods of curing
- C08G59/40—Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups ; e.g. general methods of curing characterised by the curing agents used
- C08G59/62—Alcohols or phenols
- C08G59/621—Phenols
- C08G59/623—Aminophenols
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G59/00—Polycondensates containing more than one epoxy group per molecule; Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups
- C08G59/18—Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups ; e.g. general methods of curing
- C08G59/40—Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups ; e.g. general methods of curing characterised by the curing agents used
- C08G59/4007—Curing agents not provided for by the groups C08G59/42 - C08G59/66
- C08G59/4014—Nitrogen containing compounds
- C08G59/4021—Ureas; Thioureas; Guanidines; Dicyandiamides
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G59/00—Polycondensates containing more than one epoxy group per molecule; Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups
- C08G59/18—Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups ; e.g. general methods of curing
- C08G59/40—Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups ; e.g. general methods of curing characterised by the curing agents used
- C08G59/50—Amines
- C08G59/5033—Amines aromatic
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G59/00—Polycondensates containing more than one epoxy group per molecule; Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups
- C08G59/18—Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups ; e.g. general methods of curing
- C08G59/40—Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups ; e.g. general methods of curing characterised by the curing agents used
- C08G59/50—Amines
- C08G59/504—Amines containing an atom other than nitrogen belonging to the amine group, carbon and hydrogen
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G59/00—Polycondensates containing more than one epoxy group per molecule; Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups
- C08G59/18—Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups ; e.g. general methods of curing
- C08G59/40—Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups ; e.g. general methods of curing characterised by the curing agents used
- C08G59/50—Amines
- C08G59/56—Amines together with other curing agents
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- 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
- C09J163/00—Adhesives based on epoxy resins; Adhesives based on derivatives of epoxy resins
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- 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
- C09J5/00—Adhesive processes in general; Adhesive processes not provided for elsewhere, e.g. relating to primers
- C09J5/06—Adhesive processes in general; Adhesive processes not provided for elsewhere, e.g. relating to primers involving heating of the applied adhesive
-
- 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
- C09J7/00—Adhesives in the form of films or foils
- C09J7/30—Adhesives in the form of films or foils characterised by the adhesive composition
- C09J7/35—Heat-activated
Definitions
- the present invention relates to the field of thermosetting epoxy resin structural adhesives, in particular the field of Bördelfalzverklebache.
- Thermosetting epoxy resin adhesives have long been used as adhesives for the shell of transport and used for Bördelfalzverklebitch in industrial production. It is known to produce means of transport parts such as doors, boot covers, rear wall flaps engine compartment hoods and the like from an outer panel and an inner panel by means of hinge connection. In order to ensure a fixation of the fold in this case an adhesive is used, which connects the inner panel with the outer panel. Until the final curing of the adhesive, the component is typically moved further with the edging fold, thereby mechanically stressing the bond.
- the adhesive partially harden, respectively, to pre-harden, in order to provide sufficient strength and adhesion for the further transport of the component until the final curing of the adhesive guarantee.
- the final curing of the adhesive typically takes place at a temperature of 140-220 ° C.
- EP21 13525A1 discloses activators for thermosetting epoxy resin compositions, which are characterized by a good activation effect and a good storage stability.
- the object of the present invention is therefore to provide heat-curing epoxy resin compositions which, after heating for a short time from 30 to 120 seconds to a temperature of from 90 ° C. to 130 ° C., have adequate strength and adhesion to withstand transport-related mechanical loads. Further, the strength and adhesion of the fully cured epoxy resin compositions should meet the requirements of a structural adhesive.
- thermosetting epoxy resin composition according to claim 1 is able to achieve this object.
- thermosetting epoxy resin composition comprising:
- a first component K1 comprising:
- a second component K2 comprising:
- Ri is an alkylene group having 1 - 20 C atoms which is optionally substituted and optionally has heteroatoms, and n is a value of 1 - 3;
- thermosetting epoxy resin composition further contains at least one epoxy resin hardener B which is activated by elevated temperature,
- the ratio of the tertiary amine content tAM in grams per mole of epoxide groups of the epoxy resin A is from 2.4 to 19.6 g / mol of epoxide groups, and wherein the ratio of the proportion of primary amine pAM in grams per mole of epoxy groups of the epoxy resin A is from 6 to 31 g / mol of epoxide groups.
- the thermosetting epoxy resin composition comprises a first component K1 comprising at least one epoxy resin A having on average more than one epoxide group per molecule.
- the epoxide group is preferably present as a glycidyl ether group.
- the epoxy resin A having an average of more than one epoxy group per molecule is preferably an epoxy liquid resin or a solid epoxy resin.
- solid epoxy resin is well known to the person skilled in the art and is used in contrast to "liquid epoxy resins”.
- the glass transition temperature of solid resins is above room temperature, i. they can be ground at room temperature to form free-flowing particles.
- Preferred solid epoxy resins have the formula (A-1)
- substituents R 'and R "independently of one another are either H or CH.sub.3
- the term independently of one another "in the definition of groups and radicals in this document means in each case that several groups occurring but identical in the formulas each have different meanings can.
- the index s stands for a value of> 1 .5, in particular from 2 to 12.
- Such solid epoxy resins are commercially available, for example, from Dow or Huntsman or Hexion.
- Compounds of formula (Al) with an index s between 1 and 1 .5 are referred to by the skilled person as semisolid epoxy resins.
- semisolid epoxy resins For the present invention, they are also considered as solid resins.
- Preferred epoxy liquid resins have the formula (A-I)
- the substituents FT “and R" "independently of one another are either H or Chta.
- the index r stands for a value of 0 to 1.
- r stands for a value of less than 0.2.
- DGEBA diglycidyl ethers of bisphenol A
- bisphenol F bisphenol F
- bisphenol A / F bisphenol A / F
- 'A / F' refers to a mixture of acetone with formaldehyde, which as starting material in its preparation is used.
- Such liquid resins are available, for example, as Araldite® GY 250, Araldite® PY 304, Araldite® GY 282 (Huntsman, or Hexion), or D.E.R. TM 331 or D.E.R. TM 330 (Dow) or Epikote 828 (Hexion).
- the epoxy resin A is an epoxy liquid resin of the formula (A-II).
- the thermosetting epoxy resin composition contains both at least one epoxy liquid resin of the formula (A-II) and at least one solid epoxy resin of the formula (Al).
- the proportion of epoxy resin A is preferably 10 to 85 wt.%, In particular 25 to 70 wt.%, Preferably 25 to 60 wt.%, 30 to 60 wt.%, Particularly preferably 30 to 50 wt. , based on the total weight of the thermosetting epoxy resin composition.
- the thermosetting epoxy resin composition contains at least one epoxy resin hardener B which is activated by elevated temperature, preferably at temperatures of 70 ° C or more. It is preferably a curing agent which is selected from the group consisting of dicyandiamide, guanamines, guanidines, aminoguanidines and derivatives thereof.
- substituted ureas such as 3- (3-chloro-4-methylphenyl) -1, 1-dimethylurea (chlorotoluron) or phenyl-dimethylureas, especially p-chlorophenyl-N, N-dimethylurea (Monuron ), 3-phenyl-1, 1-dimethylurea (fenuron) or 3,4-dichlorophenyl-N, N-dimethylurea (diuron).
- substituted ureas such as 3- (3-chloro-4-methylphenyl) -1, 1-dimethylurea (chlorotoluron) or phenyl-dimethylureas, especially p-chlorophenyl-N, N-dimethylurea (Monuron ), 3-phenyl-1, 1-dimethylurea (fenuron) or 3,4-dichlorophenyl-N, N-dimethylurea (diuron).
- Hardener B is preferably a hardener which is selected from the group consisting of dicyandiamide, guanamine, guanidines, aminoguanidines and derivatives thereof; substituted ureas, in particular 3- (3-chloro-4-methylphenyl) -1, 1-dimethylurea (chlorotoluron), or phenyl-dimethylureas, in particular p-chlorophenyl-N, N-dimethylurea (monuron), 3-phenyl-1, 1-dimethylurea (fenuron), 3,4-dichlorophenyl-N, N-dimethylurea (diuron), as well as imidazoles and amine complexes.
- curing agent B is dicyandiamide.
- the hardener B is in the first component K1.
- the amount of hardener B for epoxy resins, which is activated by elevated temperature is advantageously 0.1-30 wt.%, In particular 0.2-10 wt.%, Preferably 1-10 wt.%, Particularly preferably 5-10 wt. -%, based on the weight of the epoxy resin A.
- the ratio of the proportion of dicyandiamide B in grams per mole of epoxide groups of the epoxy resin A is preferably from 10 to 20 g / mol, in particular from 12.5 to 17.5 g / mol of epoxide groups.
- the second component K2 of the thermosetting epoxy resin composition contains at least one tertiary amine tAM of Formula (I) wherein Ri is an alkylene group having 1-20 C atoms, which is optionally substituted and optionally has heteroatoms, and n is a value of 1-3.
- the tertiary amine tAM is selected from the group consisting of 2- (dimethylaminomethyl) phenol, 2,6-
- the tertiary amine tAM is selected from the group consisting of 2,4,6-tris (((3- (dimethylamino) propyl) amino) methyl) phenol and 2,4,6-tris (dimethylaminomethyl) phenol, most preferably 2,4,6-tris (dimethylaminomethyl) phenol.
- 2,4,6-tris (dimethylaminomethyl) phenol is commercially available as Ancamine K54® from Air Products GmbH (Germany).
- the ratio of the proportion of tertiary amine tAM in grams per mole of epoxide groups of the epoxy resin A is from 2.4 to 19.6 g / mol of epoxide groups.
- the ratio of tertiary amine tAM in grams per mole of epoxide groups of epoxy resin A is preferably from 2.4 to 13.7 g / mol, from 3.1 to 13.7 g / mol, from 3.1 to 11.1 g / mol, in particular from 3.1 to 9.8 g / mol, epoxide groups.
- the ratio of the proportion of tertiary amine tAM in grams per mole of epoxide groups of the epoxy resin A is from 4.7 to 13.7 g / mol, in particular from 5.9 to 9.8 g / mol, epoxide groups.
- the second component K2 of the thermosetting epoxy resin composition contains at least one primary amine pAM selected from the list consisting of 1, 3-xylylenediamine (MXDA), 1, 4-xylylenediamine (PXDA), 1, 3,5-tris (aminomethyl) benzene. It is preferably 1, 3-xylylenediamine (MXDA).
- the ratio of the proportion of primary amine pAM in grams per mole of epoxide groups of the epoxy resin A is from 6 to 31 g / mol of epoxide groups.
- the ratio of the proportion of the primary amine pAM in grams per mole of epoxy groups of the epoxy resin A is from 6 to 27 g / mol, from 6 to 24 g / mol, from 6 to 16 g / mol, from 6 to 14 g / mol. from 7 to 14 g / mol, in particular from 7 to 12 g / mol, epoxide groups.
- thermosetting epoxy resin composition additionally contains at least one filler F.
- filler F are preferably carbon black, mica, talc, kaolin, wollastonite, feldspar, syenite, chlorite, bentonite, montmorillonite, calcium carbonate (precipitated or ground), dolomite, quartz, silicic acids (pyrogenic or precipitated), cristobalite, calcium oxide, aluminum hydroxide, Magnesium oxide, ceramic hollow spheres, glass hollow spheres, organic hollow spheres, glass spheres, color pigments. Filler F is meant to mean both the organic coated and the uncoated commercially available and known to those skilled forms.
- the total content of the total filler F is 2-50% by weight, preferably 10-40% by weight, in particular 20-40% by weight, based on the total weight of the thermosetting epoxy resin composition.
- the composition additionally contains at least one epoxy group-carrying reactive diluent G.
- These reactive diluents G are in particular:
- Glycidyl ethers of monofunctional saturated or unsaturated, branched or unbranched, cyclic or open-chain C 4 -C 30 alcohols e.g. Butanol glycidyl ether, hexanol glycidyl ether, 2-ethyl hexanol glycidyl ether, allyl glycidyl ether, tetrahydrofurfuryl and furfuryl glycidyl ether, trimethoxysilyl glycidyl ether, etc.
- Glycidyl ethers of difunctional saturated or unsaturated, branched or unbranched, cyclic or open-chain C 2 -C 30 -alkanols for example ethylene glycol, butanediol, hexanediol, octanediolglycidyl ether, cyclohexanedimethanoldiglycidyl ether, neopentylglycol diglycidyl ether etc.
- Glycidyl ethers of trifunctional or polyfunctional, saturated or unsaturated, branched or unbranched, cyclic or open-chain alcohols such as epoxidized castor oil, epoxidized trimethylolpropane, epoxidized pentaerythrol or polyglycidyl ethers of aliphatic polyols, such as sorbitol, glycerol, trimethylolpropane, etc.
- - Glycidyl ethers of phenolic and aniline compounds such as phenylglycidyl ether, cresyl glycidyl ether, p-tert-butylphenyl glycidyl ether, nonylphenol glycidyl ether, 3-n-pentadecenyl glycidyl ether (from cashew nut shell oil), ⁇ , ⁇ -diglycidylaniline etc.
- Epoxidized amines such as N, N-diglycidylcyclohexylamine etc.
- Epoxidized mono- or dicarboxylic acids such as glycidyl neodecanoate, glycidyl methacrylate, glycidyl benzoate, diglycidyl phthalate, tetra- and hexahydrophthalate, diglycidyl esters of dimer fatty acids, etc.
- Epoxidized di- or trifunctional, low to high molecular weight polyether polyols such as polyethylene glycol diglycidyl ether, polypropylene glycol di glycidyl ether etc. Particularly preferred are hexanediol diglycidyl ethers, cresyl glycidyl ethers, p-te / t-butylphenyl glycidyl ethers, polypropylene glycol diglycidyl ethers and
- the total proportion of epoxide group-carrying reactive diluent G is 0.1-20% by weight, preferably 0.5-8% by weight, based on the total weight of the thermosetting epoxy resin composition.
- the component K2 additionally has an aforementioned filler F.
- the filler F in the component K2 is fumed silica.
- the weight ratio of the sum of (tertiary amine tAM + primary amine pAM) to the total amount of the filler F is from 3: 1 to 1: 3, especially 1: 5: 1 to 1: 1 .5 ,
- the total weight of component K2 is less than 20% by weight, in particular less than 10% by weight, in particular less than 5% by weight, based on the total weight of the thermosetting epoxy resin composition.
- the component K2 is more than 50 wt .-%, more than 70 wt .-%, more than 80 wt .-%, more than 90 wt .-%, more than 95 wt .-%, more than 98 wt tertiary amine tAM, primary amine pAM and filler F, based on the total weight of component K2.
- Such an aforementioned component K2 is advantageous in that such a component K2 can additionally be added to a conventional one-component thermosetting epoxy resin composition, if a need for partial curing / precuring by means of short-term heat treatment to achieve sufficient strength and adhesion for the further transport of a component therewith consists.
- a further aspect of the present invention is therefore the use of an abovementioned component K2 for the partial curing of a thermosetting epoxy resin composition comprising:
- a first component K1 as previously mentioned, and at least one epoxy resin hardener B, which is activated by elevated temperature, as previously mentioned.
- the partial curing of the thermosetting epoxy resin composition is a partial cure by short term heat treatment to achieve sufficient strength and adhesion for onward transport of a component.
- the measurement of the tensile shear strength is typically carried out according to DIN EN 1465, particularly preferably as described in the example section.
- the increase in tensile shear strength is preferably more than 5%, more than 10%, more than 15%, more than 20%, especially more than 30% and preferably less than 70% of the cured thermosetting epoxy resin composition.
- the curing of the epoxy resin composition is carried out as described below as step d). It is further preferred if the increase in tensile shear strength leads to a value above 1 MPa, preferably above 2 MPa, in particular above 3 MPa.
- the increase in tensile shear strength refers to an increase over a thermosetting epoxy resin composition comprising a first component K1 previously described and at least one epoxy resin hardener B which is activated by elevated temperature.
- the thermosetting epoxy resin composition preferably has a viscosity of 500-4,000 Pas after mixing at 25 ° C, especially 1-60 seconds. This allows the composition to be easily applied at room temperature.
- the viscosities reported in this document were measured on a rheometer (Physica MCR 101, Anton Paar) by means of oscillographic measurement (gap: 1000 ⁇ m, plate / plate, plate diameter: 25 mm, frequency: 5 Hz, target deformation: 0.01) in a temperature range of 23 - 70 ° C (heating rate: 10 ° C / min).
- heat-curing epoxy resin compositions described are particularly suitable for use as heat-curing adhesives, in particular as a thermosetting structural adhesive in vehicle construction and / or for hem flange bonds.
- a thermosetting structural adhesive in vehicle construction and / or for hem flange bonds.
- Such a one-component adhesive has a wide range of uses.
- thermosetting epoxy resin compositions as a thermosetting adhesive, in particular as a thermosetting structural adhesive in vehicle construction and / or for Bördelfalzverklebache.
- Heat-stable materials are materials which are dimensionally stable at a curing temperature of 100-220 ° C., preferably 120-200 ° C., at least during the curing time.
- these are metals and plastics such as ABS, polyamide, polyphenylene ethers, composite materials such as SMC, unsaturated polyester GRP, epoxy or acrylate composites.
- Preferred is the application in which at least one material is a metal.
- the bonding of the same or different metals especially in the shell in the automotive industry and / or for Bördelfalzverklebache.
- the preferred metals are, above all, steel, in particular electrolytically galvanized, hot-dip galvanized, oiled steel, Bonazink-coated steel, and subsequently phosphated steel, and aluminum, in particular in the variants typically occurring in the automobile industry.
- thermosetting compositions allow adhesives, which after sufficient heating of 10 to 300 seconds, in particular 30 to 90 seconds, to a temperature of 90 ° C to 130 ° C have sufficient strength and adhesion to withstand transport-related mechanical stresses and in complete hardened state in terms of strength and adhesion meet the requirements of a structural adhesive.
- Such an adhesive is in particular first contacted with the materials to be bonded at a temperature of between 10 ° C and 80 ° C, in particular between 10 ° C and 60 ° C, and later the epoxy resin composition to a temperature of 90-130 ° C, in particular of 1 10 - 120 ° C and then cured at a temperature in the range of 100 to 220 ° C, cured.
- a further aspect of the present invention relates to a method for bonding heat-stable substrates, which comprises the steps:
- thermosetting epoxy resin composition as described above on the surface of a heat-stable substrate S1, in particular a metal;
- thermosetting epoxy resin composition a thermosetting epoxy resin composition with the surface of another heat-stable substrate S2, in particular a metal;
- the substrate S2 here consists of the same or a different material as the substrate S1.
- the substrates S1 and / or S2 are in particular the previously mentioned metals and plastics.
- step c) heating of the epoxy resin composition to a temperature of 90-130 ° C., in particular of 110-120 ° C., the epoxy resin composition for 10 s-300 s, 20 s-200 s, 30 s 120 s, 30 s - 90 s, more preferably 30 s - 60 s, is left at the aforementioned temperature.
- the heating of the epoxy resin composition by means of induction.
- step a) is carried out within 20 minutes, preferably 15 minutes, in particular 10 minutes, after the mixing of the epoxy resin composition.
- step d) curing of the epoxy resin composition at a temperature in the range of 100 to 220 ° C, preferably 140-220 ° C, especially 140-200 ° C, preferably between 1 60 and 190 ° C, the epoxy resin composition for 10 min - 6 h, 10 min - 2 h, 10 min - 60 min, 10 min - 30 min, more preferably 10 min - 25 min, left at the aforementioned temperature.
- the epoxy resin composition is brought to a temperature of 0-50 ° C., 10 -40 ° C., in particular 15-30 ° C., preferably more than 10 minutes min, more than 20 min, more than 25 min, especially preferably 30-60 min.
- a local transport step takes place between step c) and d) with the composite of the epoxy resin composition with the heat-stable substrates S1 and S2.
- step a) and c) a period of less than 12 h, less than 3 h, particularly preferably 30 - 120 min.
- the step b) contacting the applied thermosetting epoxy resin composition with the surface of another heat-stable substrate S2 is a beading of a heat-stable substrate S2 with a heat-stable substrate S1, in particular the heat-stable substrates are an outer panel and an inner panel.
- the heat-stable substrates are an outer panel and an inner panel.
- a further aspect of the present invention therefore relates to a bonded article obtained from the aforementioned method.
- the novel compositions are not only suitable for the automotive industry but also for other applications. Particularly noteworthy are related applications in transport engineering such as ships, trucks, buses or rail vehicles or in the construction of consumer goods such as washing machines.
- the materials bonded by means of a composition according to the invention are used at temperatures between typically 120 ° C. and -40 ° C., preferably between 100 ° C. and -40 ° C., in particular between 80 ° C. and -40 ° C.
- thermosetting epoxy resin compositions do not meet the requirements for sufficient strength and adhesion both after short-term heating, in particular by induction, and after subsequent curing.
- Table 3 it can be seen that, for example when using a tertiary amine (HMTA, Ineos) or an imidazole (imidazole, Fluka, Switzerland), either alone or in combination with K54, the strength and adhesion after short-term heating by induction (30 s, respectively 90 s, at 120 ° C) is not sufficient.
- K54 alone can not meet both requirements at the same time.
- thermosetting epoxy resin compositions which, after step d), have a tensile shear strength, in particular measured according to DIN EN 1465, particularly preferably as described in the example section, of more than 15 MPa, more than 20 MPa, more than 25 MPa.
- Epoxy liquid resin D.E.R. 331 (bisphenol A diglycidyl ether),
- Poly-THF 2000 (difunctional polybutylene glycol)
- IPDI Isophorone diisocyanate
- Cardolite NC-700 (Cardanol, meta-substituted alkenyl mono-phenol), Cardolite
- Epoxy resins are classified according to their epoxide content, which is also known as epoxide number (also EP number).
- epoxide number represents the number of epoxy groups in moles found in 100 grams of synthetic resin.
- EP number a numerical value such as "0.54" is simplified for an epoxide number of 0.54 mol epoxide groups / 100 g resin.
- the ratio of the proportion of primary amine pAM in grams per mole of epoxide groups of the epoxy resin A (referred to in Table 3 "g / mol EP") is calculated, for example, for the composition Ex.1 as follows:
- the sample was cured by induction for 30 seconds, or 90 seconds, at 120 ° C.
- a temperature probe was attached in each case. Reaching the specified temperature to 1 ° C was exactly the beginning of the measurement of the curing time. Heating the sample to 120 ° C took 30 seconds each.
- the curing procedure for Ex.1 samples took 30 seconds to heat up to 120 ° C and an additional 30 seconds to set at 120 ° C.
- the induction unit is from the company IFF GmbH Germany (EW020T control unit, LA-PEZ induction unit).
- the tensile shear strength of the samples was determined.
- the tensile shear strength was determined on a tractor at a tensile speed of 10 mm / min in a 3-fold determination according to DIN EN 1465.
- the tensile shear strength was determined on a tractor at a tensile speed of 10 mm / min in a 3-fold determination according to DIN EN 1465.
- the samples were precured by induction as previously described. Thereafter, the samples were left at room temperature and 2 hours thereafter for 35 minutes at 175 ° C Oven temperature cured. Thereafter, the tensile shear strength was determined on a tractor at a tensile speed of 10 mm / min in a 3-fold determination according to DIN EN 1465.
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- Organic Chemistry (AREA)
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- Polymers & Plastics (AREA)
- Adhesives Or Adhesive Processes (AREA)
- Epoxy Resins (AREA)
Abstract
Description
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Priority Applications (6)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2019558489A JP2020521824A (ja) | 2017-05-29 | 2018-05-29 | 熱硬化エポキシ樹脂接着剤 |
| EP18725882.7A EP3630866B1 (de) | 2017-05-29 | 2018-05-29 | Hitzehärtende epoxidharzklebstoffe |
| KR1020197031367A KR20200015462A (ko) | 2017-05-29 | 2018-05-29 | 열 경화성 에폭시 수지 접착제 |
| CN201880033337.9A CN110650988B (zh) | 2017-05-29 | 2018-05-29 | 热固化环氧树脂粘合剂 |
| ES18725882T ES2905595T3 (es) | 2017-05-29 | 2018-05-29 | Adhesivos de resina epoxi termoendurecibles |
| US16/618,240 US11279796B2 (en) | 2017-05-29 | 2018-05-29 | Heat-curing epoxy resin adhesives |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP17173288.6 | 2017-05-29 | ||
| EP17173288 | 2017-05-29 |
Publications (1)
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|---|---|
| WO2018219961A1 true WO2018219961A1 (de) | 2018-12-06 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/EP2018/064090 Ceased WO2018219961A1 (de) | 2017-05-29 | 2018-05-29 | Hitzehärtende epoxidharzklebstoffe |
Country Status (7)
| Country | Link |
|---|---|
| US (1) | US11279796B2 (de) |
| EP (1) | EP3630866B1 (de) |
| JP (1) | JP2020521824A (de) |
| KR (1) | KR20200015462A (de) |
| CN (1) | CN110650988B (de) |
| ES (1) | ES2905595T3 (de) |
| WO (1) | WO2018219961A1 (de) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3677165A4 (de) * | 2017-08-30 | 2020-10-14 | FUJIFILM Corporation | Endoskop-klebstoff, gehärtetes material, endoskop und verfahren zur herstellung eines endoskops |
| JP2022533832A (ja) * | 2019-05-21 | 2022-07-26 | ディディピー スペシャルティ エレクトロニック マテリアルズ ユーエス,エルエルシー | エポキシ接着剤組成物及び使用方法 |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20230279216A1 (en) * | 2020-08-31 | 2023-09-07 | 3M Innovative Properties Company | Thermally curable compositions, thermally cured compositions, and articles prepared therefrom |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1475412A1 (de) * | 2003-05-05 | 2004-11-10 | Sika Technology AG | Mannichbasenenthaltende Epoxidharzzusammensetzungen geeignet zur Anwendung bei Hohen Temperaturen |
| EP2113525A1 (de) | 2008-04-30 | 2009-11-04 | Sika Technology AG | Aktivator für Epoxidharzzusammensetzungen |
| CH699848A2 (de) * | 2008-11-04 | 2010-05-14 | Sika Technology Ag | Aktivator für epoxidharzzusammensetzungen. |
| CN102286138A (zh) * | 2011-07-01 | 2011-12-21 | 蓝星(北京)化工机械有限公司 | 一种快速拉挤用耐高温环氧树脂组合物 |
-
2018
- 2018-05-29 ES ES18725882T patent/ES2905595T3/es active Active
- 2018-05-29 WO PCT/EP2018/064090 patent/WO2018219961A1/de not_active Ceased
- 2018-05-29 US US16/618,240 patent/US11279796B2/en active Active
- 2018-05-29 CN CN201880033337.9A patent/CN110650988B/zh not_active Expired - Fee Related
- 2018-05-29 EP EP18725882.7A patent/EP3630866B1/de not_active Not-in-force
- 2018-05-29 JP JP2019558489A patent/JP2020521824A/ja active Pending
- 2018-05-29 KR KR1020197031367A patent/KR20200015462A/ko not_active Withdrawn
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1475412A1 (de) * | 2003-05-05 | 2004-11-10 | Sika Technology AG | Mannichbasenenthaltende Epoxidharzzusammensetzungen geeignet zur Anwendung bei Hohen Temperaturen |
| EP2113525A1 (de) | 2008-04-30 | 2009-11-04 | Sika Technology AG | Aktivator für Epoxidharzzusammensetzungen |
| CH699848A2 (de) * | 2008-11-04 | 2010-05-14 | Sika Technology Ag | Aktivator für epoxidharzzusammensetzungen. |
| CN102286138A (zh) * | 2011-07-01 | 2011-12-21 | 蓝星(北京)化工机械有限公司 | 一种快速拉挤用耐高温环氧树脂组合物 |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3677165A4 (de) * | 2017-08-30 | 2020-10-14 | FUJIFILM Corporation | Endoskop-klebstoff, gehärtetes material, endoskop und verfahren zur herstellung eines endoskops |
| US10973392B2 (en) | 2017-08-30 | 2021-04-13 | Fujifilm Corporation | Adhesive for endoscope, cured product, endoscope, and method for producing endoscope |
| JP2022533832A (ja) * | 2019-05-21 | 2022-07-26 | ディディピー スペシャルティ エレクトロニック マテリアルズ ユーエス,エルエルシー | エポキシ接着剤組成物及び使用方法 |
Also Published As
| Publication number | Publication date |
|---|---|
| EP3630866B1 (de) | 2021-12-08 |
| CN110650988B (zh) | 2022-10-14 |
| US20200190252A1 (en) | 2020-06-18 |
| JP2020521824A (ja) | 2020-07-27 |
| EP3630866A1 (de) | 2020-04-08 |
| CN110650988A (zh) | 2020-01-03 |
| KR20200015462A (ko) | 2020-02-12 |
| US11279796B2 (en) | 2022-03-22 |
| ES2905595T3 (es) | 2022-04-11 |
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