EP0435173A2
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EP
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Modified polymer rubber and process for preparing the same
Assignee: Sumitomo Chemical Co Ltd
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Filing: 1990-12-20
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Granted: —
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Expires: 2010-12-20
Abstract
Abstract A modified polymer rubber is obtained by (1) graft-polymerizing at least one grafting monomer to a shredded rubbery polymer (A) in an aqueous suspension at a temperature of 30 DEG - 130 DEG C to obtain a graft polymer, and (2) kneading the graft polymer with at least one polymerizable monomer in the presence of a free radical initiator at a temperature of 180 DEG -280 DEG C. This process does not cause gel formation and is advantageous in manufacturing cost. The modified polymer rubber thus obtained is excellent in processability and storage stability, and highly useful as a compatibilizer for various resins.
Inventors
- 👤 Akio Imai
- 👤 Mitsuji Tsuji
- 👤 Takashi Sanada
- 👤 Keisaku Yamamoto
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-09 09:39
CPC Classifications
C; C08; C08C; C08C19/00; C08F; C08F255/00; C08F255/02; C08F255/04; C08F255/06; C08F279/00; C08F279/02
Claims Analysis
Total Claims: 26
Claim 1
Independent Claim
121 words
A modified polymer rubber comprising a rubbery polymer (A) to which are added (I) at least one grafting monomer (E) selected from the group consisting of aromatic vinyl monomers (B) and vinyl monomers (F) consisting of at least one aromatic vinyl monomer (B) and at least one non-aromatic vinyl monomer (C) and (II) at least one polymerizable monomer (D) selected from the group consisting of unsaturated dicarboxylic acid anhydrides and the derivatives thereof, unsaturated monocarboxylic acid esters and the derivatives thereof, unsaturated carboxylic acid amides and the derivatives thereof, and unsaturated carboxylic acid ethers and the derivatives thereof, the weight ratio of (A) to (E) being from 100:4 to 100:90 and the weight ratio of (A):(D) being from 100:0.1 to 100:5.
Claim 2
Dependent Claim
79 words
The modified polymer rubber of claim 1, wherein the rubbery polymer (A) is at least one member selected from the group consisting of an ethylene-α-olefin copolymer rubber having a number average molecular weight of 10,000-100,000 and an ethylene unit content of 15-85% by weight, and an ethylene-α-olefin-nonconjugated diene copolymer rubber having a number average molecular weight of 10,000-100,000, an ethylene unit content of 15-85% by weight and a nonconjugated diene unit content of not more than 24% by weight.
Claim 3
Dependent Claim
20 words
The modified polymer rubber of claim 1, wherein the grafting monomer (E) is at least one aromatic vinyl monomer (B).
Claim 4
Dependent Claim
30 words
The modified polymer rubber of claim 3, wherein the aromatic vinyl monomer (B) is at least one member selected from the group consisting of styrene, o-methylstyrene, m-methylstyrene, p-methylstyrene and α-methylstyrene.
Claim 5
Dependent Claim
15 words
The modified polymer rubber of claim 4, wherein the aromatic vinyl monomer (B) is styrene.
Claim 6
Dependent Claim
34 words
The modified polymer rubber of claim 1, wherein the grafting monomer (E) is a vinyl monomer (F) consisting of at least one aromatic vinyl monomer (B) and at least one non-aromatic vinyl monomer (C).
Claim 7
Dependent Claim
30 words
The modified polymer rubber of claim 6, wherein the aromatic vinyl monomer (B) is at least one member selected from the group consisting of styrene, o-methylstyrene, m-methylstyrene, p-methylstyrene and α-methylstyrene.
Claim 8
Dependent Claim
15 words
The modified polymer rubber of claim 7, wherein the aromatic vinyl monomer (B) is styrene.
Claim 9
Dependent Claim
41 words
The modified polymer rubber of claim 6, wherein the non-aromatic vinyl monomer (C) is at least one member selected from the group consisting of acrylonitrile, metharylonitrile, acrylic acid, acrylic acid alkyl esters, methacrylic acid, methacrylic acid alkyl esters and vinyl chloride.
Claim 10
Dependent Claim
15 words
The modified polymer rubber of claim 9, wherein the non-aromatic vinyl monomer (C) is acrylonitrile.
Claim 11
Dependent Claim
31 words
The modified polymer rubber of claim 1, wherein the polymerizable monomer (D) is at least one member selected from the group consisting of maleic anhydride, allyl glycidyl ether, acrylamide and N-methylolacryamide.
Claim 12
Dependent Claim
15 words
The modified polymer rubber of claim 11, wherein the polymerizable monomer (D) is maleic anhydride.
Claim 13
Dependent Claim
136 words
A process for preparing a modified polymer rubber comprising the steps of: (1) graft-polymerizing to a shredded rubbery polymer (A) in an aqueous suspension at a temperature of 30°-130°C at least one grafting monomer (E) selected from the group consisting of aromatic vinyl monomers (B) and vinyl monomers (F) consisting of at least one aromatic vinyl monomer (B) and at least one non-aromatic vinyl monomer (C) to obtain a graft polymer, and (2) kneading the graft copolymer with at least one polymerizable monomer (D) selected from the group consisting of unsaturated dicarboxylic acid anhydrides and the derivatives thereof, unsaturated monocarboxylic acid esters and the derivatives thereof, unsaturated carboxylic acid amides and the derivatives thereof, and unsaturated carboxylic acid ethers and the derivatives thereof, in the presence of a free radical initiator at a temperature of 180°-280°C.
Claim 14
Dependent Claim
85 words
The process of claim 13, wherein the step (1) includes the step of selecting as the rubbery polymer (A) at least one member selected from the group consisting of an ethylene-α-olefin copolymer rubber having a number average molecular weight of 10,000-100,000 and an ethylene unit content of 15-85% by weight, and an ethylene-α-olefin-nonconjugated diene copolymer rubber having a number average molecular weight of 10,000-100,000, an ethylene unit content of 15-85% by weight and a nonconjugated diene unit content of not more than 24% by weight.
Claim 15
Dependent Claim
24 words
The process of claim 13, wherein the step (1) includes the step of selecting an aromatic vinyl monomer (B) as the grafting monomer (E).
Claim 16
Dependent Claim
36 words
The process of claim 15, wherein the step (1) includes the step of selecting at least one member selected from the group consisting of styrene, o-methylstyrene, m-methylstyrene, p-methylstyrene and α-methylstyrene as the aromatic vinyl monomer (B).
Claim 17
Dependent Claim
21 words
The process of claim 13, wherein the step (1) includes the step of selecting styrene as the aromatic vinyl monomer (B).
Claim 18
Dependent Claim
39 words
The process of claim 13, wherein the step (1) includes the step of selecting vinyl monomers (F) consisting of at least one aromatic vinyl monomer (B) and at least one non-aromatic vinyl monomer (C) as the grafting monomers (E).
Claim 19
Dependent Claim
36 words
The process of claim 18, wherein the step (1) includes the step of selecting at least one member selected from the group consisting of styrene, o-methylstyrene, m-methylstyrene, p-methylstyrene and α-methylstyrene as the aromatic vinyl monomer (B).
Claim 20
Dependent Claim
21 words
The process of claim 19, wherein the step (1) includes the step of selecting styrene as the aromatic vinyl monomer (B).
Claim 21
Dependent Claim
47 words
The process of claim 13, wherein the step (1) includes the step of selecting at least one member selected from the group consisting of acrylonitrile, methacrylonitrile, acrylic acid, acrylic acid alkyl esters, methacrylic acid, methacrylic acid alkyl esters and vinyl chloride as the non-aromatic vinyl monomer (C).
Claim 22
Dependent Claim
21 words
The process of claim 21, wherein the step (1) includes the step of selecting acrylonitrile as the non-aromatic vinyl monomer (C).
Claim 23
Dependent Claim
37 words
The process of claim 13, wherein the step (1) includes the step of selecting at least one member selected from the group consisting of maleic anhydride, allyl glycidyl ether, acrylamide and N-methylolacrylamide as the polymerizable monomer (D).
Claim 24
Dependent Claim
21 words
The process of claim 23, wherein the step (1) includes the step of selecting maleic anhydride as the polymerizable monomer (D).
Claim 25
Dependent Claim
35 words
The process of claim 13, wherein the step (1) includes the step of selecting a weight ratio of the rubbery polymer (A) to the grafting monomer (E) within the range of from 100:5 to 100:100.
Claim 26
Dependent Claim
35 words
The process of claim 13, wherein the step (2) includes the step of selecting a weight ratio of the rubbery polymer (A) to the polymerizable monomer (D) within the range of from 100:0.3 to 100:10.
References Cited (Backward Citations)
No citation records indexed.
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