US4767806A
Expired / Lapsed
US
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Carboxyl modified olefinic copolymer composition
Assignee: Uniroyal Chemical Co Inc
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Filing: 1987-01-05
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Granted: 1988-08-30
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Expires: 2007-01-05
Abstract
Abstract The invention relates to a novel low profile additive (LPA) for uncured polyester resins and the resultant molding compositions. The low profile additive is the reaction product of an ethylene/alphaolefin copolymer with a carboxylic acid or anhydride, to thereby form a non-thermoplastic carboxyl modified polyolefin. The novel LPA is a remarkably effective dimensional stabilizer and has displayed the ability to achieve net expansion in a cured polyester resin molding composition.
Inventors
- 👤 Frank C. Cesare
- 👤 William P. Whelan, Jr.
- 👤 Henno A. Petersen
- 👤 Thomas S. Coolbaugh
- 👤 Robert G. Davis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 08:42
CPC Classifications
C; C08; C08L; C08L67/00; C08L67/06; C08F; C08F290/00
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
99 words
A curable molding composition comprising: (a) a curable polyester resin, and (b) a liquid carboxyl modified polyolefin added in an amount effective to reduce shrinkage of the polyester resin during curing, said polyolefin being a liquid reaction product of a low molecular weight ethylene/alphaolefin copolymer with a carboxylic acid or anhydride containing three or more carbon atoms and one or more acid or anhydride groups, said alphaolefin having a formula H 2 C═CHR wherein R is an alkyl radical containing from 1 to 10 carbon atoms, the copolymer having a number average molecular weight ranging from 250 to 15,000.
Claim 2
Dependent Claim
99 words
A curable molding composition comprising: (a) a curable polyester resin, and (b) a liquid carboxyl modified polyolefin added in an amount effective to reduce shrinkage of the polyester resin during curing, said polyolefin being a liquid reaction product of a low molecular weight ethylene/alphaolefin copolymer with a carboxylic acid or anhydride containing three or more carbon atoms and one or more acid or anhydride groups, said alphaolefin having a formula H 2 C═CHR wherein R is an alkyl radical containing from 1 to 10 carbon atoms, the copolymer having a number average molecular weight ranging from 250 to 15,000.
Claim 3
Dependent Claim
26 words
The curable molding composition of claim 1, wherein the amount of polyolefin used ranges from 5 to 100 parts per 100 parts of the polyester resin.
Claim 4
Dependent Claim
10 words
The curable molding composition of claim 1, further comprising fillers.
Claim 5
Dependent Claim
11 words
The curable molding composition of claim 1, further comprising fiber reinforcement.
Claim 6
Dependent Claim
18 words
The curable molding composition of claim 1, further comprising a thickener of magnesium or calcium oxide or hydroxide.
Claim 7
Dependent Claim
33 words
The curable molding composition of claim 1, wherein the carboxyl modified polyolefin is formed of an unsaturated carboxylic acid or anhydride containing three or more carbon atoms and one or more carboxyl groups.
Claim 8
Dependent Claim
18 words
The curable molding composition of claim 6, wherein the carboxyl modified unsaturated polyolefin is formed from maleic anhydride.
Claim 9
Dependent Claim
22 words
The curable molding composition of claim 1, wherein the carboxyl modified polyolefin has a number average molecular weight between 5,000 and 14,000.
Claim 10
Dependent Claim
21 words
The curable molding composition of claim 1, wherein the carboxyl modified polyolefin has 0.1% to 10% by weight of carboxyl groups.
Claim 11
Dependent Claim
21 words
The curable molding composition of claim 1, further characterized in that it is in a solution of an ethylenically unsaturated monomer.
Claim 12
Dependent Claim
12 words
The curable molding composition of claim 10, wherein the monomer is styrene.
Claim 13
Dependent Claim
11 words
The curable molding composition of claim 10, further comprising an initiator.
Claim 14
Dependent Claim
18 words
The curable molding composition of claim 1, further comprising an initiator, a thickener, a filler, and fiber reinforcement.
Claim 15
Dependent Claim
32 words
The curable molding composition of claim 1, wherein the polyolefin copolymer has >C═CH 2 terminal unsaturation on the least 50% of the polyolefin and a molecular weight ranging from 3,000 to 10,000.
Claim 16
Dependent Claim
25 words
The curable molding composition of claim 1, wherein the ethylene/alphaolefin copolymer is an ethylene/propylene copolymer and the ethylene content is 30 to 70% by weight.
Claim 17
Dependent Claim
19 words
The curable molding composition of claim 15, wherein the polyolefin further comprises up to 25% of a nonconjugated polyene.
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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) | 1991-08-30 | 1992-02-29 | 1992-08-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-08-30 | 1996-02-29 | 1996-08-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-08-30 | 2000-02-29 | 2000-08-30 | $7700.00 | Window Closed / Lapsed |