US4263199A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyester molding compositions
Assignee: Union Carbide Corp
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Filing: 1979-11-13
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Granted: 1981-04-21
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Expires: 1999-11-13
Abstract
Abstract Glass-reinforced polyester molding compositions when mixed with lactone polymers and vinyl chloride polymers as additives afford molding compounds with greater shrinkage control and molded parts with smoother surfaces.
Inventors
- 👤 Kenneth E. Atkins
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 00:04
CPC Classifications
C; C08; C08L; C08L67/00; C08L67/06; C08K; C08K3/00; C08K3/18; C08K3/20; C08K3/22; C08K3/40; C08L27/00; C08L27/02; C08L27/04; C08L27/06; C08L67/02; C08L67/04
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
44 words
In a glass-reinforced molding composition containing an unsaturated polyester, a low-profile additive and an ethylenically unsaturated polymerizable monomer suitable for use in molding applications, the improvement wherein the low-profile additive is a combination of a carboxyl-containing saturated polyester and a vinyl chloride/vinyl acetate polymer.
Claim 2
Dependent Claim
44 words
In a glass-reinforced molding composition containing an unsaturated polyester, a low-profile additive and an ethylenically unsaturated polymerizable monomer suitable for use in molding applications, the improvement wherein the low-profile additive is a combination of a carboxyl-containing saturated polyester and a vinyl chloride/vinyl acetate polymer.
Claim 3
Dependent Claim
108 words
The composition claimed in claim 1 wherein the carboxyl-containing saturated polyester is a lactone polyester having repeating units depicted by the formula: ##STR7## end-capped with phthalic acid groups, wherein each R is hydrogen, halogen, or a monovalent hydrocarbon radical containing a maximum of 12 carbon atoms, A is an oxy group, x and y are each integers having values of 1 to 4 inclusive and z is an integer having a value of 0 or 1 with the proviso that (a) the sum of x+y+z is 4 to 6 inclusive and (b) the total number of R variables which are substituents other than hydrogen does not exceed 3.
Claim 4
Dependent Claim
53 words
The composition claimed in claim 2 wherein the carboxyl-containing saturated polyester is a condensation polymer of a saturated aliphatic or aromatic dicarboxylic acid, having about 4 to 8 carbon atoms, with a saturated aliphatic diol having 2 to about 6 carbon atoms, or an ester diol having up to about 10 carbon atoms.
Claim 5
Dependent Claim
20 words
The composition claimed in claim 3 wherein the saturated aliphatic acid is adipic and the saturated diol is ethylene glycol.
Claim 6
Dependent Claim
21 words
The composition claimed in claim 3 wherein the saturated aromatic dicarboxylic acid is terephthalic acid and the ester diol is 2,2-dimethyl-3-hydroxypropyl-2,2-dimethyl-3-hydroxypropionate.
Claim 7
Dependent Claim
22 words
The composition claimed in claim 1 wherein the vinyl chloride polymer is a terpolymer of vinyl chloride, vinyl acetate and maleic acid.
Claim 8
Dependent Claim
27 words
The composition claimed in claim 1 wherein the vinyl chloride polymer contains about 17 weight % vinyl acetate and about 2 weight % maleic acid copolymerized therein.
Claim 9
Dependent Claim
15 words
Composition claimed in claim 1 containing a thickening amount of a chemically active thickening agent.
Claim 10
Dependent Claim
12 words
Composition claimed in claim 8 wherein the thickening agent is magnesium oxide.
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) | 1984-04-20 | 1984-10-20 | 1985-04-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-04-20 | 1988-10-20 | 1989-04-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-04-20 | 1992-10-20 | 1993-04-21 | $7700.00 | Window Closed / Lapsed |