US4360618A
Expired / Lapsed
US
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Low acrylonitrile content styrene-acrylonitrile polymers blended with polyphenylene oxide
Assignee: Monsanto Co
•
Filing: 1981-11-19
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Granted: 1982-11-23
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Expires: 2001-11-19
Abstract
Abstract Polyphenylene oxide blended with SAN or ABS polymers containing from 2 to 8% by weight of acrylonitrile have highly advantageous combination of strength and distortion temperature.
Inventors
- 👤 Quirino A. Trementozzi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 22:38
CPC Classifications
C; C08; C08L; C08L71/00; C08L71/08; C08L71/10; C08L71/12; C08L71/123
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
65 words
A polyblend comprising: A. from 10 to 90% by weight of a polyphenylene oxide; and B. from 90 to 10% by weight of a polymer comprising: from 2 to 8% by weight of an unsaturated nitrile monomer; from 72 to 98% by weight of a vinylaromatic monomer; and from 0 to 20% by weight of a rubber having a glass transition temperature below 0° C.
Claim 2
Dependent Claim
65 words
A polyblend comprising: A. from 10 to 90% by weight of a polyphenylene oxide; and B. from 90 to 10% by weight of a polymer comprising: from 2 to 8% by weight of an unsaturated nitrile monomer; from 72 to 98% by weight of a vinylaromatic monomer; and from 0 to 20% by weight of a rubber having a glass transition temperature below 0° C.
Claim 3
Dependent Claim
17 words
A polyblend according to claim 1 in which the polyphenylene oxide is a self-condensation polymer of 2,6-dimethylphenol.
Claim 4
Dependent Claim
23 words
A polyblend according to claim 1 in which the Component B is selected from the group consisting of acrylonitrile/butadiene/styrene copolymers and styrene/acrylonitrile copolymers.
Claim 5
Dependent Claim
26 words
A polyblend according to any one of claims 1 to 3 in which the weight proportions of Components A and B are from 30:70 to 70:30.
Claim 6
Dependent Claim
16 words
A polyblend according to any one of claims 1 to 3 that comprises a triaryl phosphate.
Claim 7
Dependent Claim
40 words
A polyblend according to claim 1 that also comprises up to 40% based on the combined weights of Components A and B of a polymer of styrene and maleic anhydride comprising from 5 to 30% by weight of maleic anhydride.
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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) | 1985-11-22 | 1986-05-24 | 1986-11-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-11-22 | 1990-05-24 | 1990-11-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-11-22 | 1994-05-24 | 1994-11-23 | $7700.00 | Window Closed / Lapsed |