US4431760A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Esters as processing aids for maleic anhydride resins
Assignee: Standard Oil Co
•
Filing: 1982-03-11
•
Granted: 1984-02-14
•
Expires: 2002-03-11
Abstract
Abstract It has been found that the addition of small amounts of a benzoate or acetate ester of a polyfunctional hydroxy-containing compound to a maleic anhydride-containing resin greatly increases the flowability and processibility of these resins.
Inventors
- 👤 Brandford E. Giddings
- 👤 II Richard J. Jorkasky
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 10:42
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/0008; C08K5/0016; C08K5/04; C08K5/10; C08K5/101; C08K5/105; C08K5/107
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
8 words
A thermoplastic composition which comprises a blend of:
Claim 2
Dependent Claim
8 words
A thermoplastic composition which comprises a blend of:
Claim 3
Dependent Claim
50 words
(1) a copolymer of maleic anhydride comprising maleic anhydride and a monomer copolymerizable therewith, and (2) from 1-20 parts by weight of a lubricant dispersed in the copolymer wherein said lubricant is selected from the group consisting of the acetate ester of bisphenol A, sulphonyldiphenol, 4,4'-thiodiphenol, hydroquinone, resorcinol and o,o'-biphenol.
Claim 4
Dependent Claim
50 words
(1) a copolymer of maleic anhydride comprising maleic anhydride and a monomer copolymerizable therewith, and (2) from 1-20 parts by weight of a lubricant dispersed in the copolymer wherein said lubricant is selected from the group consisting of the acetate ester of bisphenol A, sulphonyldiphenol, 4,4'-thiodiphenol, hydroquinone, resorcinol and o,o'-biphenol.
Claim 5
Dependent Claim
14 words
The composition of claim 1 wherein the copolymer contains 6% to 50% maleic anhydride.
Claim 6
Dependent Claim
14 words
The composition of claim 1 wherein the copolymer contains 40% to 50% maleic anhydride.
Claim 7
Dependent Claim
32 words
The composition of claim 1 wherein the monomer copolymerizable therewith includes at least one monomer selected from the group consisting of indene, isobutylene, diisobutylene, styrene, methyl acrylate, methyl methacrylate and vinyl acetate.
Claim 8
Dependent Claim
13 words
The composition of claim 1 wherein the copolymer comprises a styrene/maleic anhydride copolymer.
Claim 9
Dependent Claim
16 words
The composition of claim 5 wherein 50 to 94 mole percent of the copolymer comprises styrene.
Claim 10
Dependent Claim
16 words
The composition of claim 6 wherein up to 80% of the styrene is replaced by isobutylene.
Claim 11
Dependent Claim
18 words
The composition of claim 1 wherein the lubricant is selected from the group consisting of hydroquinone and resorcinol.
References Cited (Backward Citations)
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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) | 1987-02-13 | 1987-08-15 | 1988-02-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-02-13 | 1991-08-15 | 1992-02-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-02-13 | 1995-08-15 | 1996-02-14 | $7700.00 | Window Closed / Lapsed |