EP0242027B1
Expired / Lapsed
EP
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Block copolymers comprising rubber and polyester segments, method of preparation
Assignee: Takemoto Oil and Fat Co Ltd
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Filing: 1987-02-16
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Granted: 1994-09-21
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Expires: 2007-02-16
Abstract
No abstract record available.
Inventors
- 👤 Mitsuo Kinoshita
- 👤 Shigeru Imamura
- 👤 Hirokazu Matsueda
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-04 12:14
CPC Classifications
C; C08; C08G; C08G63/00; C08G63/68; C08G63/02; C08G63/12; C08G63/40
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
166 words
A block copolymer which has the formula (I) wherein M is a polydiene block or hydrogenated polydiene block; is a polyester block which is derived from the reaction between a dicarboxylic anhydride and epoxide, wherein R¹-R⁵ are as defined below; wherein q is zero when the polydiene or hydrogenated polydiene from which M is derived had within its molecule a hydroxyl group, and q is 1 when the polydiene or hydrogenated polydiene from which M is derived had a carboxyl group, and R²-R⁵ are as defined below; R¹ is ethylene, ethenylene, 1,2-phenylene, 1,2-cyclohexylene, or cyclohexenylene and is the same or different in each repeat unit; R²-R⁵ are the same or different and are hydrogen or C₁₋₂ alkyl and are the same or different in each repeat unit; n and p are positive integers; R⁶ is hydrogen or wherein R¹ is as defined; and functional derivatives thereof, the weight ratio of the polydiene block to the total block copolymer being in the range of 95-5 weight %.
Claim 2
Dependent Claim
18 words
A block copolymer according to claim 1 wherein the polydiene is a homopolymer of polybutadiene or hydrogenated polybutadiene.
Claim 3
Dependent Claim
18 words
A block copolymer according to claim 1 wherein the polydiene is a homopolymer of polyisoprene or hydrogenated polyisoprene.
Claim 4
Dependent Claim
37 words
A block copolymer according to any of claims 1 to 3 wherein the free ends of the polyester blocks are modified by reaction with compounds having reactive groups selected from a vinyl, epoxy, isocyanate and carboxylic acid.
Claim 5
Dependent Claim
27 words
A block copolymer according to any of claims 1 to 3 wherein the ends of the polyester blocks are modified by formation of an ester or ether.
Claim 6
Dependent Claim
28 words
A block copolymer according to any of the claims 1 to 3 wherein the free end carboxyl groups are converted to their alkali or alkine earth metal salts.
Claim 7
Dependent Claim
26 words
A block copolymer according to any of claims 1 to 4 wherein more than 25% the free ends of the polyester blocks are carboxylic acid group.
Claim 8
Dependent Claim
17 words
An additive for synthetic resins comprising a block copolymer according to any of claims 1 to 7
Claim 9
Dependent Claim
21 words
An additive according to claim 8 wherein the weight ratio of said polydiene: said polyester blocks is between 10% and 95%.
Claim 10
Dependent Claim
15 words
An additive according to claim 8 wherein the said ratio is between 40% and 90%.
Claim 11
Dependent Claim
46 words
A method of producing block copolymer according to claim 1, comprising reacting a polydiene having one or more hydroxyl groups or carboxylic acid groups within its molecule with at least one organic dicarboxylic anhydride and one or more species of 1,2-epoxide in the presence of catalyst.
Claim 12
Dependent Claim
20 words
A method according to claim 11 wherein the said catalyst is lithium halide or a tetra- C₁₋₄ alkyl ammoniun salt.
References Cited (Backward Citations)
No citation records indexed.
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