Patent US1763361A successfully refreshed from Google Patents.
US4020124A
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Blends of a polyphenylene ether resin, alkenyl aromatic resins modified with EPDM rubber and graft polymerized high rubber content polymers
Assignee: General Electric Co
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Filing: 1975-12-22
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Granted: 1977-04-26
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Expires: 1995-12-22
Abstract
Abstract Novel thermoplastic compositions are disclosed which include a polyphenylene ether resin, an alkenyl aromatic resin modified with an EPDM rubber and an emulsion graft copolymer of an alkenyl aromatic resin and a rubbery interpolymer of a mixture of monoolefins and a polyene; or a graft polymerization product of an acrylic monomer alone or in admixture with styrene and a rubber diene polymer or styrenediene copolymer. Also included with the scope of this invention are reinforced and flame-retardant compositions of said thermoplastic materials.
Inventors
- 👤 Visvaldis Abolins
- 👤 Glenn D. Cooper
- 👤 Gim F. Lee, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 04:07
CPC Classifications
C; C08; C08L; C08L51/00; C08L51/003; C08L71/00; C08L71/08; C08L71/10; C08L71/12; C08L71/123
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
172 words
A thermoplastic molding composition which comprises: a. from 20-65% by weight of a polyphenylene ether resin; b. from 25-70% by weight of an alkenyl aromatic resin that is modified with a rubbery interpolymer which comprises 10-90 mole percent of ethylene, 10-90 mole percent of an alpha olefin having from 3-10 carbon atoms and from 0.1-10 mole percent of a polyene that is a non-conjugated cyclc or open-chain diene that has from 5-10 carbon atoms; and c. from 5-20% by weight of a graft copolymer comprising (1) from 20-80% by weight of a back-bone polymer of the units of butadiene or butadiene and styrene, wherein the butadiene units are present in quantities of at least 40% by weight of the backbone polymer, (2) 80-20% by weight of an acrylic monomer graft polymerized to (1) the acrylic monomer units chosen from the group consisting of lower alkyl methacrylates, alicyclic methacrylates and alkyl acrylates, and (3) 0 to 60% by weight of a styrene monomer graft polymerized to (1) sequentially before the polymerization of (2).
Claim 2
Dependent Claim
172 words
A thermoplastic molding composition which comprises: a. from 20-65% by weight of a polyphenylene ether resin; b. from 25-70% by weight of an alkenyl aromatic resin that is modified with a rubbery interpolymer which comprises 10-90 mole percent of ethylene, 10-90 mole percent of an alpha olefin having from 3-10 carbon atoms and from 0.1-10 mole percent of a polyene that is a non-conjugated cyclc or open-chain diene that has from 5-10 carbon atoms; and c. from 5-20% by weight of a graft copolymer comprising (1) from 20-80% by weight of a back-bone polymer of the units of butadiene or butadiene and styrene, wherein the butadiene units are present in quantities of at least 40% by weight of the backbone polymer, (2) 80-20% by weight of an acrylic monomer graft polymerized to (1) the acrylic monomer units chosen from the group consisting of lower alkyl methacrylates, alicyclic methacrylates and alkyl acrylates, and (3) 0 to 60% by weight of a styrene monomer graft polymerized to (1) sequentially before the polymerization of (2).
Claim 3
Dependent Claim
14 words
The molding composition of claim 1 wherein the alkenyl aromatic resin is styrene resin.
Claim 4
Dependent Claim
26 words
The molding composition of claim 2 wherein said rubbery interpolymer comprises 10-90mole percent of ethylene; 10-90 mole percent of propylene and 0.1-10 mole percent of 5-ethylidene-2-norbornene.
Claim 5
Dependent Claim
15 words
The molding composition of claim 2 wherein the polyphenylene ether resin is poly-(2,6-dimethyl-1,4-phenylene) ether resin.
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) | 1980-04-25 | 1980-10-25 | 1981-04-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-04-25 | 1984-10-25 | 1985-04-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-04-25 | 1988-10-25 | 1989-04-26 | $7700.00 | Window Closed / Lapsed |