GB2085452A - Olefin copolymer resin compositions - Google Patents
Olefin copolymer resin compositions Download PDFInfo
- Publication number
- GB2085452A GB2085452A GB8126496A GB8126496A GB2085452A GB 2085452 A GB2085452 A GB 2085452A GB 8126496 A GB8126496 A GB 8126496A GB 8126496 A GB8126496 A GB 8126496A GB 2085452 A GB2085452 A GB 2085452A
- Authority
- GB
- United Kingdom
- Prior art keywords
- weight
- ethylene
- propylene
- resin composition
- composition according
- 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- Withdrawn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
- 239000011342 resin composition Substances 0.000 title claims abstract description 21
- 229920000089 Cyclic olefin copolymer Polymers 0.000 title 1
- 229920001897 terpolymer Polymers 0.000 claims abstract description 15
- 229920005676 ethylene-propylene block copolymer Polymers 0.000 claims abstract description 10
- 229920005673 polypropylene based resin Polymers 0.000 claims abstract description 10
- QQONPFPTGQHPMA-UHFFFAOYSA-N propylene Natural products CC=C QQONPFPTGQHPMA-UHFFFAOYSA-N 0.000 claims description 8
- 125000004805 propylene group Chemical group [H]C([H])([H])C([H])([*:1])C([H])([H])[*:2] 0.000 claims description 8
- OJOWICOBYCXEKR-KRXBUXKQSA-N (5e)-5-ethylidenebicyclo[2.2.1]hept-2-ene Chemical compound C1C2C(=C/C)/CC1C=C2 OJOWICOBYCXEKR-KRXBUXKQSA-N 0.000 claims description 4
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 claims description 4
- 239000005977 Ethylene Substances 0.000 claims description 4
- RRHGJUQNOFWUDK-UHFFFAOYSA-N Isoprene Chemical compound CC(=C)C=C RRHGJUQNOFWUDK-UHFFFAOYSA-N 0.000 claims description 4
- 150000001993 dienes Chemical class 0.000 claims description 4
- AHAREKHAZNPPMI-UHFFFAOYSA-N hexadiene group Chemical group C=CC=CCC AHAREKHAZNPPMI-UHFFFAOYSA-N 0.000 claims description 3
- 239000000155 melt Substances 0.000 claims description 3
- HECLRDQVFMWTQS-RGOKHQFPSA-N 1755-01-7 Chemical compound C1[C@H]2[C@@H]3CC=C[C@@H]3[C@@H]1C=C2 HECLRDQVFMWTQS-RGOKHQFPSA-N 0.000 claims description 2
- WTQBISBWKRKLIJ-UHFFFAOYSA-N 5-methylidenebicyclo[2.2.1]hept-2-ene Chemical compound C1C2C(=C)CC1C=C2 WTQBISBWKRKLIJ-UHFFFAOYSA-N 0.000 claims description 2
- 229920001400 block copolymer Polymers 0.000 claims description 2
- 239000000203 mixture Substances 0.000 description 8
- 238000012360 testing method Methods 0.000 description 8
- -1 polypropylene Polymers 0.000 description 6
- 239000004743 Polypropylene Substances 0.000 description 5
- 241001441571 Hiodontidae Species 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 3
- 229920001577 copolymer Polymers 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 229920001155 polypropylene Polymers 0.000 description 3
- 102100021663 Baculoviral IAP repeat-containing protein 5 Human genes 0.000 description 2
- 101800000103 Bradykinin-potentiating peptide 10c Proteins 0.000 description 2
- 101800001668 Bradykinin-potentiating peptide-2 Proteins 0.000 description 2
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 2
- 101000935612 Gloydius halys Bradykinin-potentiating peptide 1 Proteins 0.000 description 2
- 101000896234 Homo sapiens Baculoviral IAP repeat-containing protein 5 Proteins 0.000 description 2
- 101000877379 Homo sapiens ETS-related transcription factor Elf-3 Proteins 0.000 description 2
- 239000000654 additive Substances 0.000 description 2
- HQQADJVZYDDRJT-UHFFFAOYSA-N ethene;prop-1-ene Chemical group C=C.CC=C HQQADJVZYDDRJT-UHFFFAOYSA-N 0.000 description 2
- 239000000945 filler Substances 0.000 description 2
- 239000004615 ingredient Substances 0.000 description 2
- 229920001684 low density polyethylene Polymers 0.000 description 2
- 239000004702 low-density polyethylene Substances 0.000 description 2
- 239000008188 pellet Substances 0.000 description 2
- 230000000704 physical effect Effects 0.000 description 2
- 239000005995 Aluminium silicate Substances 0.000 description 1
- 229920002943 EPDM rubber Polymers 0.000 description 1
- 239000006096 absorbing agent Substances 0.000 description 1
- 235000012211 aluminium silicate Nutrition 0.000 description 1
- 239000003963 antioxidant agent Substances 0.000 description 1
- 235000006708 antioxidants Nutrition 0.000 description 1
- 239000010425 asbestos Substances 0.000 description 1
- 238000000071 blow moulding Methods 0.000 description 1
- 229910000019 calcium carbonate Inorganic materials 0.000 description 1
- WEMFUFMJQFVTSW-UHFFFAOYSA-N compositin Natural products CC=C(C)C(=O)OC1CC(O)C2(C)COC3C2C1(C)C1CCC2(C)C(CC=C2C1(C)C3OC(=O)C(C)=CC)c1ccoc1 WEMFUFMJQFVTSW-UHFFFAOYSA-N 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000009472 formulation Methods 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- 239000012760 heat stabilizer Substances 0.000 description 1
- 229920001519 homopolymer Polymers 0.000 description 1
- 238000009863 impact test Methods 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 229920001384 propylene homopolymer Polymers 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 239000011369 resultant mixture Substances 0.000 description 1
- 229910052895 riebeckite Inorganic materials 0.000 description 1
- 239000000454 talc Substances 0.000 description 1
- 229910052623 talc Inorganic materials 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L53/00—Compositions of block copolymers containing at least one sequence of a polymer obtained by reactions only involving carbon-to-carbon unsaturated bonds; Compositions of derivatives of such polymers
Landscapes
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
A polypropylene-based resin composition having excellent impact resistance and weld characteristics comprises from 50% to 90% by weight of a crystalline ethylene-propylene block copolymer and from 50% to 3% by weight of an ethylene- propylene-diene elastic terpolymer having a Mooney viscosity (ML1+4, 100 DEG C) of from 70 to 150.
Description
SPECIFICATION
Resin compositions
The present invention relates to resin compositions and provides a range of polypropylene-based resin compositions which have particularly good impact resistance and weld characteristics.
One of the disadvantages of homopolymers of propylene is that their impact resistance is poor.
In order to improve such poor impact resistance of polypropylene, it is well known to mix polypropylene with low density polyethylene, amorphous ethylene-propylene copolymer, or amorphous ethylene-propylene-diene terpolymer. The resulting compositions, however, suffer from the disadvantage that weld characteristics which are significant factors in injection moulding are seriously deteriorated although the impact resistance is improved.
It has therefore been the subject of a long and continuous search to improve the poor impact resistance of polypropylene without the deterioration of weld characteristics. For this purpose, several methods have been proposed, including the method of Japanese Patent Publication No.
39987/1976 in which a specific propylene-ethylene block copolymer is used as a base resin and a small amount of low density polyethylene is added thereto. There is, however, still a need further to improve the weld characteristics.
The invention provides a polypropylene-based resin composition comprising from 50% to 97% by weight of a crystalline ethylene-propylene block copolymer and from 50% to 3% by weight of an ethylene-propylene-diene elastic terpolymer having a Mooney viscosity of 70 to 1 50 (ML, +4, 100"C). It has unexpectedly and surprisingly been found that the compositions of the invention have particularly good weld characteristics as well as good impact resistance.The specific range of Mooney Viscosities given for the elastic terpolymer is quite specific and characteristic, although a preferred range of Mooney viscosities (ML, +4, 100"C) is from 80 to 1 20. All the Mooney viscosities as described hereinafter are determined under the same conditions as above, i.e., My1+4, 100"C.
The crystalline ethylene-propylene block copolymer used in the composition of the invention preferably has a melt index (MI) of from 0.2 to 10 grams/l0 minutes, advantageously from 0.5 to 8 grams/l0 minutes, and an ethylene content of from 3% to 30% by weight.
The elastic terpolymer preferably has a propylene content of from 20% to 60% by weight, and a diene content of from 1 % to 15% by weight. Examples of suitable dienes include hexadiene, dicyclopentadiene, ethylidenenorbornene, methylenenorbornene, propylenenorbornene and isoprene.
The polypropylene-based resin composition of the invention comprises from 50% to 97% by weight, preferably from 60% to 95% by weight, of the crystalline ethylene-propylene block copolymer and from 50% to 3% by weight, preferably from 40% to 5% by weight, of the ethylene-propylene-diene elastic terpolymer.
The polypropylene-based resin composition of the invention can contain usual auxiliary additives, such as anti-oxidants, heat stabilizers, ultraviolet absorbing agents, and colourants. In addition, suitable amounts (usually 0 to 50% by weight of the composition) of fillers such as calcium carbonate, kaolin, talc, asbestos and glass fibres can be added.
In preparing the polypropylene-based resin composition according to the invention, the crystalline ethylene-propylene block copolymer and ethylene-propylene-diene elastic terpolymer, and if necessary, auxiliary additives may be fillers are mixed, fully kneaded at a temperature of from 1 70 to 230"C by the use of an extruder, a co-kneader or a Banbury mixer. The composition is then generally pelletized. The resulting pellets can be injection-moulded at a temperature of from 200"C to 300"C, resulting in moulded articles with good weld characteristics and impact resistance. The moulding composition is suitable for the manufacture of components for motor cars and electrical appliances.
The resin compositions of the invention are also suitable for blow moulding.
The invention is illustrated in the following Example.
EXAMPLE
In accordance with the formulations shown in Table 1, ingredients were compounded and kneaded in a Banbury mixer, and the resultant mixture was moulded to a sheet. The sheet was pulverized or pelletized by the use of a sheet pelletizer, and the resulting pellets were injectionmoulded to provide a test piece. A further such invention-moulded product was cut to provide a specimen for the Izod impact test. With these test pieces, the physical tests were performed.
The results are shown in Table 2.
The tensile strength, tensile elongation and Izod impact strength as general physical properties were measured by the usual testing methods (according to the methods defined in JIS K 7113 and K 7110).
With regard to the weld characteristics, the tensile elongation test was performed using a test piece (Type: dumbbell No. 2, thickness 2 millimetres) according to JIS K 7113, and the tensile impact strength test was performed using a test piece (Type L) according to ASTM D 1 822.
The symbols used in Table 1 are as follows:
PP Propylene homopolymer
(MI = 3.5, density (D) = 0.91 grams/cubic centimetres)
BPP-1 Ethylene-propylene block copolymer
(MI = 2.3, D = 0.91, ethylene content = 10% by weight)
BPP-2 Ethylene-propylene block copolymer
(Ml = 2.8, D = 0.91, ethylene content = 9.7% by weight)
EPR-1 Ethylene-propylene elastic copolymer
(Mooney viscosity = 40, propylene content = 49% by
weight)
EPR-2 Ethylene-propylene elastic copolymer
(Mooney viscosity = 70, propylene content = 26% by
weight)
EPDM- 1 Ethylene-propylene-ethylidenenorbornene elastic
terpolymer
(Mooney viscosity = 65, propylene content = 43% by
weight, ethylidenenorbornene content = 5% by weight)
EPDM-2 Ethyiene-propyiene-ethylideneorbornene elastic
terpolymer
(Mooney viscosity = 88, propylene content = 28% by
weight, ethylidenenorbornene content = 5% by weight)
EPDM-3 Ethylene-propylene-hexadiene elastic terpolymer
(Mooney viscosity = 97, propylene content = 27% by
weight, hexadiene content = 3% by weight) Table 1
Ingredients compounded (parts by weight)
Compositin No. PP BPP-1 BPP-2 EPR-1 EPR-2 EPDM-1 EPDM-2 EPDM-3 1 - 100 - - - - 15 2 - 100 - - - - - 15 3 - - 100 - - - - 15 4 - - 100 - - - - 30 5* - - 100 - - - - 6* 100 - - - - - - 15 7* - - 100 - - 15 - 8* - - 100 15 - - - 9* - - 100 - 15 - - *Comparative examples Table 2
General Physical Properties Weld Characteristics
Tensile Tensile Impact Strength Tensile Tensile Impact
Composition
Strength Elongation (kg.cm/cm) Elongation Strength
No.
(Kg/cm) (%) 23 C -30 C (%) (kg.cm/cm 1 320 700 80 11 670 122 2 310 700 81 10 660 176 3 310 700 82 10 96 123 4 340 700 85 30 126 178 5* 280 600 14 5 72 110 6* - - - - 8 36 7* 310 700 81 10 17 136 8* 310 700 82 11 21 115 9* 310 700 81 10 23 123 *Comparative examples It can beseen from the results shown in Table 2 that the polypropylene-based resin compositions Nos. 1 to 4 of the present invention have substantially better impact resistance and weld characteristics than the comparative polypropylene-based resin compositions Nos. 5 to 9 which are outside the scope of the invention.
Claims (9)
1. A polypropylene-based resin composition comprising from 50% to 97% by weight of a crystalline ethylene-propylene block copolymer and from 50% to 3% by weight of an ethylenepropylene-diene elastic terpolymer having a Mooney viscosity (ML, +4, 100"C) of from 70 to 150.
2. A resin composition according to claim 1, wherein the ethylene-propylene-diene elastic terpolymer has Mooney viscosity (ML, + 1 OO"C) of from 80 to 120.
3. A resin composition according to claim 1 or claim 2, comprising from 60% to 95% by weight of the crystalline ethylene-propylene block copolymer and from 40% to 5% by weight of the ethylene-propylene-diene elastic terpolymer.
4. A resin composition according to any preceding claim, wherein the crystalline ethylenepropylene block copolymer has a melt index (MI) of from 0.2 to 10 grams per 10 minutes, and an ethylene content of from 3% to 30% by weight.
5. A resin composition according to claim 4, wherein the crystalline ethylene-propyiene block copolymer has a melt index (MI) of from 0.5 to 8 grams per 10 minutes.
6. A resin composition according to any preceding claim, wherein the ethylene-propylenediene elastic terpolymer has a propylene content of from 20% to 60% by weight.
7. A resin composition according to claim 6, wherein the terpolymer has a diene content of from 1% to 15% by weight.
8. A resin composition according to any preceding claim, wherein the diene component of the ethylene-propylene-diene elastic terpolymer is hexadiene, dicyclopentadiene, ethylidenenorbornene, methylenenorbornene, propylenenorbornene or isoprene.
9. A polypropylene-based resin composition according to claim 1, substantially as disclosed in the Example herein.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12200780A JPS5747344A (en) | 1980-09-03 | 1980-09-03 | Polypropylene resin composition |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB2085452A true GB2085452A (en) | 1982-04-28 |
Family
ID=14825250
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB8126496A Withdrawn GB2085452A (en) | 1980-09-03 | 1981-09-01 | Olefin copolymer resin compositions |
Country Status (5)
| Country | Link |
|---|---|
| JP (1) | JPS5747344A (en) |
| BE (1) | BE890172A (en) |
| DE (1) | DE3133574A1 (en) |
| FR (1) | FR2489349B1 (en) |
| GB (1) | GB2085452A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4480065A (en) * | 1982-06-04 | 1984-10-30 | Mitsui Toatsu Chemicals, Incorporated | Polypropylene-base resin composition |
| GB2266891A (en) * | 1992-04-14 | 1993-11-17 | Mclaren Cars Nv | Improvements in or relating to vehicles |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57207630A (en) * | 1981-06-15 | 1982-12-20 | Toa Nenryo Kogyo Kk | Thermoplastic resin composition |
| JPS58148984U (en) * | 1982-03-31 | 1983-10-06 | 日本マランツ株式会社 | Automotive bracket for communication devices, etc. |
| JP2773485B2 (en) * | 1991-10-04 | 1998-07-09 | 三菱電機株式会社 | Mounting device for in-vehicle equipment |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5145200A (en) * | 1974-10-16 | 1976-04-17 | Teijin Ltd | HORIESUTERUNOSEIZOHOHO |
| IT1067776B (en) * | 1976-08-06 | 1985-03-16 | Mentedison Spa | THERMOPLASTIC POLYMER MATERIAL FOR MOTOR VEHICLES |
| JPS6016982B2 (en) * | 1976-11-22 | 1985-04-30 | 豊田合成株式会社 | Resin composition with excellent impact resistance |
| IT1088155B (en) * | 1977-10-27 | 1985-06-10 | Montedison Spa | MODIFIED POLYPROPYLENE-BASED SELF-EXTINGUISHING POLYMERIC COMPOSITIONS |
| JPS54103451A (en) * | 1978-02-01 | 1979-08-14 | Kohkoku Chem Ind | Synthetic resin sheet for books and stationery |
-
1980
- 1980-09-03 JP JP12200780A patent/JPS5747344A/en active Pending
-
1981
- 1981-08-25 DE DE19813133574 patent/DE3133574A1/en not_active Ceased
- 1981-08-31 FR FR8116558A patent/FR2489349B1/en not_active Expired
- 1981-09-01 GB GB8126496A patent/GB2085452A/en not_active Withdrawn
- 1981-09-01 BE BE0/205836A patent/BE890172A/en not_active IP Right Cessation
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4480065A (en) * | 1982-06-04 | 1984-10-30 | Mitsui Toatsu Chemicals, Incorporated | Polypropylene-base resin composition |
| GB2266891A (en) * | 1992-04-14 | 1993-11-17 | Mclaren Cars Nv | Improvements in or relating to vehicles |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5747344A (en) | 1982-03-18 |
| BE890172A (en) | 1982-01-04 |
| FR2489349B1 (en) | 1986-05-16 |
| DE3133574A1 (en) | 1982-04-08 |
| FR2489349A1 (en) | 1982-03-05 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| WAP | Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1) |