EP0249964A2
Expired / Lapsed
EP
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Polycarbonate resin composition
Assignee: Mitsubishi Chemical Corp
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Filing: 1987-06-16
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Granted: —
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Expires: 2007-06-16
Abstract
Abstract A polycarbonate resin composition excellent in chemical resistance, weather resistance, heat resistance, and low-temperature impact resistance, which comprises, either a polycarbonate resin (A) or a mixture (A') of the polycarbonate resin and a saturated polyester and/or a polyester elastomer and either a siloxane based graft copolymer (B) obtained by graft polymerization of 95 to 10% by weight of at least one vinyl monomer onto 5 to 90% by weight of a polyorganosiloxane rubber which exhibits a degree of swelling of 3 to 30 as measured in toluene at 25 °C, contains constitutional units derived from a graft-linking agent, and has an average particle size of 0.08 to 0.8 µm or a micture (B) of the siloxane-based graft copolymer and a vinyl polymer, wherein the component (B) is blended so that the content of the polyorganoslioxane rubber may be from 0.5 to 60% by weight based on the whole resin composition.
Inventors
- 👤 Masafumi Hongo
- 👤 Hideyuki Shigemitsu
- 👤 Naoki Yamamoto
- 👤 Akira Yanagase
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-26 18:33
CPC Classifications
C; C08; C08L; C08L69/00; C08L67/00; C08L67/02; C08L67/025
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
135 words
A polycarbonate resin composition comprising either a polycarbonate resin (A) or a mixture (A') of the polycarbonate resin and a saturated polyester and/or a polyester elastomer and either a siloxane-based graft copolymer (B) obtained by graft polymerization of 95 to 10% by weight of at least one vinyl monomer onto 5 to 90% by weight of a polyorganosiloxane rubber which exhibits a degree of swelling of 3 to 30 as measured in toluene, contains constitutional units derived from a graft-linking agent, and has an average particle size of 0.08 to 0.8 µm or a mixture ( B ) of the siloxane-based graft copolymer and a vinyl polymer, wherein the component (B) is blended so that the content of the polyorganosiloxane rubber may be from 0.5 to 60% by weight based on the whole resin composition.
Claim 2
Dependent Claim
135 words
A polycarbonate resin composition comprising either a polycarbonate resin (A) or a mixture (A') of the polycarbonate resin and a saturated polyester and/or a polyester elastomer and either a siloxane-based graft copolymer (B) obtained by graft polymerization of 95 to 10% by weight of at least one vinyl monomer onto 5 to 90% by weight of a polyorganosiloxane rubber which exhibits a degree of swelling of 3 to 30 as measured in toluene, contains constitutional units derived from a graft-linking agent, and has an average particle size of 0.08 to 0.8 µm or a mixture ( B ) of the siloxane-based graft copolymer and a vinyl polymer, wherein the component (B) is blended so that the content of the polyorganosiloxane rubber may be from 0.5 to 60% by weight based on the whole resin composition.
Claim 3
Dependent Claim
67 words
The polycarbonate resin composition of Claim 1, wherein the vinyl polymer in the mixture (B) of the siloxane-based graft copolymer and the vinyl polymer is obtained by polymerizing 70 to 100% by weight of at least one monomer selected from the group consisting of aromatic vinyl monomers, vinyl cyanide monomers, methacrylate monomers, and acrylate monomers and 30 to 0% by weight of a vinyl monomer copolymerizable therewith.
Claim 4
Dependent Claim
68 words
The polycarbonate resin composition of Claim 1, which comprises the component (A') and the component (B) that is either the siloxane-based graft copolymer or a mixture of the siloxane-based graft copolymer and the vinyl polymer and the component (A') is a mixture of 1 to 99 parts by weight of the polycarbonate resin and 99 to 1 part by weight of the saturated polyester and/or the polyester elastomer.
Claim 5
Dependent Claim
49 words
The polycarbonate resin composition of Claim 1, which comprises 10 to 90 parts by weight of the component (A) and 90 to 10 parts by weight of the component (B) that is either the siloxane-based graft copolymer or a mixture of the siloxane-based graft copolymer and the vinyl polymer.
Claim 6
Dependent Claim
66 words
The polycarbonate resin composition of Claim 1, 2, 3, or 4, wherein the polyorganosiloxane rubber has units represented by any of the general formulae wherein, R 1 denotes methyl, ethyl, propyl, or phenyl, R 2 denotes hydrogen or methyl, n denotes a number of 0, 1, or 2, and p denotes an integer of 1 to 6, as constitutional units derived from a graft linking agent.
Claim 7
Dependent Claim
27 words
The polycarbonate resin composition of Claim 5, wherein the polyorganosiloxane rubber has units represented by the general formula (I) as constitutional units derived from a graft-linking agent.
Claim 8
Dependent Claim
41 words
The polycarbonate resin composition of Claim 1, 2, 3, or 4, wherein the vinyl monomer to be graft-polymerized onto the polyorganosiloxane rubber is at least one monomer selected from the group consisting of styrene, a-methylstyrene, acrylonitrile, methyl methacrylate, and butyl acrylate.
Claim 9
Dependent Claim
22 words
The polycarbonate resin composition of Claim 1, 2, 3, or 4, wherein the polycarbonate resin (A) is of the bisphenol A type.
Claim 10
Dependent Claim
84 words
The polycarbonate resin composition of Claim 1, 2, or 3, wherein in the mixture (A') of a polycarbonate and a saturated polyester and/or a polyester elastomer, the polycarbonate resin is of the bisphenol A type, the saturated polyester consists of polytetramethylene terephthalate and/or polyethylene terephthalate, and the polyester elastomer is a block copolymer of high-melting polyester segments consisting of polytetramethylene terephthalate or polyethylene terephthalate and low-melting polymer segments of molecular weight 400 to 20,000 consisting of a polyalkylene ether glycol or an aliphatic polyester.
Claim 11
Dependent Claim
28 words
The polycarbonate resin composition of Claim 1, 2, or 3, wherein the proportion of low-melting polymer segments in the polyester elastomer is from 2 to 80% by weight.
References Cited (Backward Citations)
No citation records indexed.
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