Patent US4421883A successfully refreshed from Google Patents.
US4421883A
Expired / Lapsed
US
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Polyphenylene ether molding compositions that include an alkenyl aromatic resin and an EPDM rubber
Assignee: General Electric Co
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Filing: 1981-08-14
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Granted: 1983-12-20
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Expires: 2001-08-14
Abstract
Abstract Novel molding compositions are disclosed which comprise a polyphenylene ether resin, an alkenyl aromatic resin and EPDM rubber.
Inventors
- 👤 Glenn D. Cooper
- 👤 Gim F. Lee, Jr.
- 👤 Rainey A. Shufelt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 05:32
CPC Classifications
C; C08; C08L; C08L25/00; C08L51/00; C08L71/00; C08L71/08; C08L71/10; C08L71/12; C08L71/123; C08L23/00; C08L23/02; C08L23/16; C08L81/00
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
48 words
A thermoplastic molding composition which consists essentially of: (a) from 35-95 parts by weight of a polyphenylene ether resin; (b) from 65-5 parts by weight of a phosphate compound; and (c) from 1-15 parts by weight of a rubbery interpolymer of a mixture of monoolefins and a polyene.
Claim 2
Dependent Claim
48 words
A thermoplastic molding composition which consists essentially of: (a) from 35-95 parts by weight of a polyphenylene ether resin; (b) from 65-5 parts by weight of a phosphate compound; and (c) from 1-15 parts by weight of a rubbery interpolymer of a mixture of monoolefins and a polyene.
Claim 3
Dependent Claim
34 words
A thermoplastic molding composition as defined in claim 1 wherein the polyphenylene ether resin is poly(2,6-dimethyl-1,4-phenylene) ether resin, the phosphate is tri-aryl phosphate and the rubbery interpolymer is derived from ethylene, propylene and 1,4-hexadiene.
Claim 4
Dependent Claim
34 words
A thermoplastic molding composition as defined in claim 1 wherein the polyphenylene ether resin is poly(2,6-dimethyl-1,4-phenylene) ether resin; the phosphate is triphenyl phosphate and the rubbery interpolymer is derived from ethylene, propylene and 5-ethylidene-2-norbornene.
Claim 5
Dependent Claim
34 words
A thermoplastic molding composition as defined in claim 3 wherein the poly(2,6-dimethyl-1,4-phenylene) ether resin has an intrinsic viscosity of from about 0.40 dl/g to about 0.65 dl/g as measured in chloroform at 30° C.
Claim 6
Dependent Claim
30 words
A thermoplastic molding composition as defined in claim 3 wherein the rubbery interpolymer comprises 10-90 mole percent of ethylene; 10-90 mole percent of propylene and 0.1-12 mole percent of 5-ethylidene-2-norbornene.
Claim 7
Dependent Claim
67 words
A thermoplastic molding composition which consists essentially of: (a) from 35-95 parts by weight of a polyphenylene ether resin; (b) from 65-5 parts by weight of a phosphate compound; and (c) from 1-15 parts by weight of a mixture of (i) a rubbery interpolymer of a mixture of monoolefins and a polyene and (ii) a thermoplastic rubber which is an ABA block copolymer having a saturated midblock.
Claim 8
Dependent Claim
67 words
A thermoplastic molding composition which consists essentially of: (a) from 35-95 parts by weight of a polyphenylene ether resin; (b) from 65-5 parts by weight of a phosphate compound; and (c) from 1-15 parts by weight of a mixture of (i) a rubbery interpolymer of a mixture of monoolefins and a polyene and (ii) a thermoplastic rubber which is an ABA block copolymer having a saturated midblock.
Claim 9
Dependent Claim
19 words
A thermoplastic molding composition as defined in claim 6 wherein the ABA block copolymer is a styrene-butadiene-styrene block copolymer.
Claim 10
Dependent Claim
21 words
A thermoplastic molding composition as defined in claim 6 wherein at least 25% by weight of (c) is the rubbery interpolymer.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-12-19 | 1987-06-20 | 1987-12-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-12-19 | 1991-06-20 | 1991-12-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-12-19 | 1995-06-20 | 1995-12-20 | $7700.00 | Window Closed / Lapsed |