US4172861A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Impact-resistant, high softening maleic anhydride copolymers
Assignee: Standard Oil Co
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Filing: 1978-03-01
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Granted: 1979-10-30
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Expires: 1998-03-01
Abstract
Abstract High softening thermoplastic polymeric compositions having good impact resistance are composed of polymerized maleic anhydride, a cyclic olefin such as beta-pinene, styrene, and a preformed rubber such as a styrene-butadiene rubber.
Inventors
- 👤 George S. Li
- 👤 II Richard J. Jorkasky
- 👤 Gerald P. Coffey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 13:03
CPC Classifications
C; C08; C08F; C08F291/00; C08F291/02
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
163 words
The resinous polymer composition resulting from the polymerization of 100 parts by weight of (A) from 10 to 85% by weight of styrene, (B) from 10 to 50% by weight of maleic anhydride, and (C) from 5 to 50% by weight of a member selected from the group consisting of beta-pinene, limonene, methylene cyclopentane, and methylene cyclohexane, wherein the sum of (A) plus (B) plus (C) is always 100%, in the presence of from 1 to 40 parts by weight of (D) a rubber selected from the group consisting of (1) a rubbery polymer of from 50 to 100% by weight of at least one member selected from the group consisting of butadiene and isoprene and from 0 to 50% by weight of at least one member selected from the group consisting of an olefinic nitrile, an ester of an acrylic acid, and styrene, (2) a homopolymer of an ester of an acrylic acid, (3) chlorinated butyl rubber, and (4) an ethylene-propylene rubber.
Claim 2
Dependent Claim
163 words
The resinous polymer composition resulting from the polymerization of 100 parts by weight of (A) from 10 to 85% by weight of styrene, (B) from 10 to 50% by weight of maleic anhydride, and (C) from 5 to 50% by weight of a member selected from the group consisting of beta-pinene, limonene, methylene cyclopentane, and methylene cyclohexane, wherein the sum of (A) plus (B) plus (C) is always 100%, in the presence of from 1 to 40 parts by weight of (D) a rubber selected from the group consisting of (1) a rubbery polymer of from 50 to 100% by weight of at least one member selected from the group consisting of butadiene and isoprene and from 0 to 50% by weight of at least one member selected from the group consisting of an olefinic nitrile, an ester of an acrylic acid, and styrene, (2) a homopolymer of an ester of an acrylic acid, (3) chlorinated butyl rubber, and (4) an ethylene-propylene rubber.
Claim 3
Dependent Claim
9 words
The polymer of claim 1 wherein (C) is beta-pinene.
Claim 4
Dependent Claim
188 words
The process comprising polymerizing in an organic solvent in the presence of a free-radical initiator and in the substantial absence of molecular oxygen in the temperature range of from about 0° to 100° C. 100 parts by weight of (A) from 10 to 85% by weight of styrene, (B) from 10 to 50% by weight of maleic anhydride, and (C) from 5 to 50% by weight of a member selected from the group consisting of beta-pinene, limonene, methylene cyclopentane, and methylene cyclohexane, wherein the sum of (A) plus (B) plus (C) is always 100%, in the presence of from 1 to 40 parts by weight of (D) a rubber selected from the group consisting of (1) a rubbery polymer of from 50 to 100% by weight of at least one member selected from the group consisting of butadiene and isoprene and from 0 to 50% by weight of at least one member selected from the group consisting of an olefinic nitrile, an ester of an acrylic acid, and styrene, (2) a homopolymer of an ester of an acrylic acid, (3) chlorinated butyl rubber, and (4) an ethylene-propylene rubber.
Claim 5
Dependent Claim
188 words
The process comprising polymerizing in an organic solvent in the presence of a free-radical initiator and in the substantial absence of molecular oxygen in the temperature range of from about 0° to 100° C. 100 parts by weight of (A) from 10 to 85% by weight of styrene, (B) from 10 to 50% by weight of maleic anhydride, and (C) from 5 to 50% by weight of a member selected from the group consisting of beta-pinene, limonene, methylene cyclopentane, and methylene cyclohexane, wherein the sum of (A) plus (B) plus (C) is always 100%, in the presence of from 1 to 40 parts by weight of (D) a rubber selected from the group consisting of (1) a rubbery polymer of from 50 to 100% by weight of at least one member selected from the group consisting of butadiene and isoprene and from 0 to 50% by weight of at least one member selected from the group consisting of an olefinic nitrile, an ester of an acrylic acid, and styrene, (2) a homopolymer of an ester of an acrylic acid, (3) chlorinated butyl rubber, and (4) an ethylene-propylene rubber.
Claim 6
Dependent Claim
9 words
The process of claim 3 wherein (C) is beta-pinene.
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) | 1982-10-29 | 1983-04-30 | 1983-10-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-10-29 | 1987-04-30 | 1987-10-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-10-29 | 1991-04-30 | 1991-10-30 | $7700.00 | Window Closed / Lapsed |