US4226953A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thermoplastic compositions of styrene-acrylonitrile resin and nitrile rubber
Assignee: Advanced Elastomer Systems LP
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Filing: 1979-02-22
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Granted: 1980-10-07
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Expires: 1999-02-22
Abstract
Abstract Thermoplastic compositions are described comprising blends of styrene-acrylonitrile resin and nitrile rubber of high gel content.
Inventors
- 👤 Aubert Y. Coran
- 👤 Raman P. Patel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 07:09
CPC Classifications
C; C08; C08L; C08L9/00; C08L9/02; C08L25/00; C08L25/02; C08L25/04; C08L25/08; C08L25/12
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
79 words
A thermoplastic composition comprising a blend of about 20 to about 65 parts by weight thermoplastic SAN resin comprising a polymer of styrene and acrylonitrile and about 75 to about 35 parts by weight nitrile rubber comprising a polymer of 1,3-butadiene or isoprene and vinyl nitrile monomer per 100 total parts by weight SAN resin and nitrile rubber in which the nitrile rubber is cured with rubber curative and has a gel content in toluene of at least 85%.
Claim 2
Dependent Claim
79 words
A thermoplastic composition comprising a blend of about 20 to about 65 parts by weight thermoplastic SAN resin comprising a polymer of styrene and acrylonitrile and about 75 to about 35 parts by weight nitrile rubber comprising a polymer of 1,3-butadiene or isoprene and vinyl nitrile monomer per 100 total parts by weight SAN resin and nitrile rubber in which the nitrile rubber is cured with rubber curative and has a gel content in toluene of at least 85%.
Claim 3
Dependent Claim
41 words
The composition of claim 1 comprising a blend of about 30 to about 50 parts by weight SAN resin and about 70 to about 50 parts by weight of nitrile rubber having a gel content in toluene of at least 90%.
Claim 4
Dependent Claim
14 words
The composition of claim 2 having an elongation at break of at least 100%.
Claim 5
Dependent Claim
27 words
The composition of claim 3 in which the nitrile rubber is in the form of dispersed particles of a size of 50 microns number average or less.
Claim 6
Dependent Claim
25 words
The composition of claim 4 having an elongation at break of at least 150% and a true stress at break of at least 400 Kg./sq.cm.
Claim 7
Dependent Claim
86 words
An elastoplastic composition comprising a blend of about 25 to about 40 parts by weight SAN resin comprising a polymer of styrene and acrylonitrile and about 75 to about 60 parts by weight rubber comprising a polymer of 1,3-butadiene or isoprene and vinyl nitrile monomer per 100 total parts by weight SAN resin and nitrile rubber in which the nitrile rubber is cured with rubber curative and has a gel content in toluene of at least 85% which composition is elastomeric and processable as a thermoplastic.
Claim 8
Dependent Claim
86 words
An elastoplastic composition comprising a blend of about 25 to about 40 parts by weight SAN resin comprising a polymer of styrene and acrylonitrile and about 75 to about 60 parts by weight rubber comprising a polymer of 1,3-butadiene or isoprene and vinyl nitrile monomer per 100 total parts by weight SAN resin and nitrile rubber in which the nitrile rubber is cured with rubber curative and has a gel content in toluene of at least 85% which composition is elastomeric and processable as a thermoplastic.
Claim 9
Dependent Claim
21 words
The composition of claim 6 in which the nitrile rubber is cured with rubber curative comprising organic peroxide and acrylate co-agent.
Claim 10
Dependent Claim
14 words
The composition of claim 6 having an elongation at break of at least 150%.
Claim 11
Dependent Claim
16 words
The composition of claim 8 having a true stress at break of at least 300 Kg./sq.cm.
Claim 12
Dependent Claim
20 words
The composition of claim 9 in which the nitrile rubber has a gel content in toluene of at least 90%.
References Cited (Backward Citations)
US2550139A
Cited
US2698313A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-10-07 | 1984-04-07 | 1984-10-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-10-07 | 1988-04-07 | 1988-10-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-10-07 | 1992-04-07 | 1992-10-07 | $7700.00 | Window Closed / Lapsed |