Patent US4341884A successfully refreshed from Google Patents.
US4341884A
Expired / Lapsed
US
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Polymer composition
Assignee: Stamicarbon BV
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Filing: 1981-04-01
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Granted: 1982-07-27
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Expires: 2001-04-01
Abstract
Abstract An improved polymer composition having a combination of good flow behavior, UV stability, and very good impact resistance is described, essentially composed of a. 50-95 parts by weight of one or more copolymers obtained by the polymerization of a mixture of 10-90% by weight of acrylonitrile and/or methacrylonitrile; and, b. 5-50 parts by weight of 1. a largely saturated rubber, and 2. chlorinated polyethylene, wherein the chlorinated polyethylene has a chlorine content of 32-40% by weight, a DSC crystallinity of 0-7%, while the weight ratio of rubber to chlorinated polyethylene is between 2:1 and 1:10, i.e., from 0.1 to 2.
Inventors
- 👤 Herman A. J. Schepers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:59
CPC Classifications
C; C08; C08L; C08L25/00; C08L25/02; C08L25/04; C08L25/08; C08L25/12; C08L25/16; C08L33/00; C08L33/18; C08L33/20; C08L23/00; C08L23/02; C08L23/16; C08L23/26; C08L23/28; C08L23/286
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
105 words
An impact resistant polymer composition combination formulated from the combination of: a. 50 to 90 parts by weight of at least one copolymer obtained by the copolymerization of 10 to 90% by weight of a styrene monomer with 90 to 10% by weight of acrylonitrile or methacrylonitrile monomer; b. 5 to 50 parts by weight of b.1. a rubber having a substantially-saturated main chain, and b.2. a chlorinated polyethylene having a chlorine content of between 32 and 40% by weight and a DSC crystallinity of 0 to 7%, while maintaining the weight ratio of said chlorinated polyethylene to said rubber is between 1:1 and 4:1.
Claim 2
Dependent Claim
105 words
An impact resistant polymer composition combination formulated from the combination of: a. 50 to 90 parts by weight of at least one copolymer obtained by the copolymerization of 10 to 90% by weight of a styrene monomer with 90 to 10% by weight of acrylonitrile or methacrylonitrile monomer; b. 5 to 50 parts by weight of b.1. a rubber having a substantially-saturated main chain, and b.2. a chlorinated polyethylene having a chlorine content of between 32 and 40% by weight and a DSC crystallinity of 0 to 7%, while maintaining the weight ratio of said chlorinated polyethylene to said rubber is between 1:1 and 4:1.
Claim 3
Dependent Claim
19 words
A polymer composition according to claim 1, wherein said copolymer is a copolymer of styrene or α-methylstyrene with acrylonitrile.
Claim 4
Dependent Claim
18 words
A polymer composition according to claim 1, wherein said rubber is an ethylene-propylene rubber or an ethylene-propylene-diene rubber.
Claim 5
Dependent Claim
60 words
A polymer composition according to claim 1, which has the composition of a. 50 to 90% by weight of styrene-acrylonitrile copolymer or α-methylstyrene acrylonitrile copolymer, b.1. 2.5 to 25% by weight of ethylene-propylene rubber or ethylene-propylene-diene rubber, and b.2. 2.5 to 25% by weight of chlorinated polyethylene, to which has been added c. up to 10% by weight of additives.
References Cited (Backward Citations)
US3819763A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-07-26 | 1986-01-25 | 1986-07-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-07-26 | 1990-01-25 | 1990-07-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-07-26 | 1994-01-25 | 1994-07-27 | $7700.00 | Window Closed / Lapsed |