Patent US4892900A successfully refreshed from Google Patents.
US4892900A
Expired / Lapsed
US
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Polyphenylene ether resin composition
Assignee: Mitsubishi Chemical Corp
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Filing: 1988-09-29
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Granted: 1990-01-09
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Expires: 2008-09-29
Abstract
Abstract A polyphenylene ether resin composition superior in impact resistance, heat resistance, mechanical strength, moldability, and flow properties, comprising a polyphenylene ether resin (A), a polystyrene resin (B), and a polyorganosiloxane-based graft copolymer (C) produced by graft polymerizing one or more vinyl monomers onto a polyorganosiloxane rubber which contains a graft-linking agent copolymerized and exhibits a degree of swelling of 3 to 15 measured in toluene.
Inventors
- 👤 Isao Sasaki
- 👤 Naoki Yamamoto
- 👤 Akira Yanagase
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 18:43
CPC Classifications
C; C08; C08L; C08L51/00; C08L51/08; C08L51/085; C08L25/00; C08L25/02; C08L25/04; C08L25/06; C08L71/00; C08L71/08; C08L71/10; C08L71/12; C08L71/123; C08L83/00
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
53 words
A polyphenylene ether resin composition comprising a polyphenylene ether resin (A), a polystyrene resin (B), and a polyorganosiloxane-based graft copolymer (C) produced by graft polymerizing one or more vinyl monomers onto a polyorganosiloxane rubber which contains a graft-linking agent copolymerized and exhibits a degree of swelling of 3 to 15 measured in toluene.
Claim 2
Dependent Claim
53 words
A polyphenylene ether resin composition comprising a polyphenylene ether resin (A), a polystyrene resin (B), and a polyorganosiloxane-based graft copolymer (C) produced by graft polymerizing one or more vinyl monomers onto a polyorganosiloxane rubber which contains a graft-linking agent copolymerized and exhibits a degree of swelling of 3 to 15 measured in toluene.
Claim 3
Dependent Claim
45 words
The polyphenylene ether resin composition of claim 1, which is composed of 20 to 80% by weight of the polyphenylene ether resin (A), 19 to 75% by weight of the polystyrene resin (B), and 1 to 40% by weight of the polyorganosilocane-based graft copolymer (C).
Claim 4
Dependent Claim
54 words
The polyphenylene ether resin composition of claim 1, wherein the graft-linking agent is a compound which can form units represented by the formulae ##STR4## wherein, R 1 denotes methyl, ethyl, propyl, or phenyl, R 2 denotes hydrogen or methyl, n denotes 0, 1, or 2, and p denotes a number of 1 to 6.
Claim 5
Dependent Claim
40 words
The polyphenylene ether resin composition of claim 1, wherein the polyorganosiloxane-based graft copolymer (C) is prepared by graft-polymerizing one or more vinyl monomers according to an emulsion polymerization method onto a polyorganosiloxane rubber prepared according to an emulsion polymerization method.
Claim 6
Dependent Claim
24 words
The polyphenylene ether resin composition of claim 4, wherein the average particle size of the polyorganosiloxane-based graft copolymer is from 0.1 to 0.5 μm.
Claim 7
Dependent Claim
28 words
The polyphenylene ether resin composition of claim 1, wherein the vinyl monomer is at least one member selected from the group consisting of aromatic alkenyl compounds and methacrylates.
Claim 8
Dependent Claim
23 words
The polyphenylene ether resin composition of claim 1, wherein the polyorganosiloxane rubber is constituted of a polyorganosiloxane which consists mainly of dimethylsilaxane units.
Claim 9
Dependent Claim
22 words
A polyphenylene ether resin composition containing a phosphoric ester flame retarder in addition to a resin composition set forth in claim 1.
Claim 10
Dependent Claim
17 words
The polyphenylene ether resin composition of claim 8, wherein the phosphoric ester flame retarder is triphenyl phosphate.
Claim 11
Dependent Claim
61 words
The polyphenylene ether resin composition of claim 8, which comprises a blend of 0.5 to 35 parts by weight of a phosphoric ester flame retarder with 100 parts by weight of the resin composition composed of 20 to 80% by weight of component (A), 19 to 75% by weight of component (B), and 1 to 40% by weight of component (C).
Claim 12
Dependent Claim
22 words
A polyphenylene ether resin composition containing glass fiber and/or carbon fiber in addition to a resin composition set forth in claim 1.
Claim 13
Dependent Claim
68 words
The polyphenylene ether resin composition of claim 11, which comprises a blend of 5 to 100 parts by weight of glass fiber and/or 5 to 50 parts by weight of carbon fiber with 100 parts by weight of the resin composition composed of 20 to 80% by weight of component (A), 19 to 75% by weight of component (B), and 1 to 40% by weight of component (C).
Claim 14
Dependent Claim
28 words
A polyphenylene ether resin composition containing a phosphoric ester flame retarder and glass fiber and/or carbon fiber in addition to a resin composition set forth in claim 1.
Claim 15
Dependent Claim
17 words
The polyphenylene ether resin composition of claim 13, wherein the phosphoric ester flame retarder is triphenyl phosphate.
Claim 16
Dependent Claim
81 words
The polyphenylene ether resin composition of claim 13, which comprises a blend of 0.5 to 35 parts by weight of a phosphoric ester flame retarder and 5 to 100 parts by weight of glass fiber and/or 5 to 50 parts by weight of carbon fiber with 100 parts by weight of the resin composition composed of 20 to 80% by weight of component (A), 19 to 75% by weight of component (B), and 1 to 40% by weight of component (C).
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-01-08 | 1993-07-10 | 1994-01-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-01-08 | 1997-07-10 | 1998-01-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-01-08 | 2001-07-10 | 2002-01-09 | $7700.00 | Window Closed / Lapsed |