Claims
- 1. A molding composition which provides articles having smooth, glossy surfaces on release from a mold consisting essentially of:
- A. polyethylene terephthalate having an inherent viscosity of at least about 0.4;
- B. between about 10 and about 60 percent by weight reinforcing or filling material;
- C. a material selected from a sodium or potassium salt of a hydrocarbon acid containing between about 7 and 25 carbon atoms, or a sodium or potassium salt of an organic polymer which contains pendant carboxyl groups, said material present in an amount sufficient to provide a .DELTA.H.sub.H /.DELTA.H.sub.c ratio of less than 0.25 to a mixture of components A, B and C;
- D. a compound present in an amount sufficient to provide a Tpk at least 4.degree. C. lower than the Tpk of a mixture of components A, B and C, said compound being selected from
- (a) organic esters selected from the product of an aromatic carboxylic acid of 7-11 carbon atoms containing at least 1 carboxyl group per aromatic nucleus which is attached directly to said nucleus, and an alcohol selected from those of the formula (HOCH.sub.2 --.sub.x R' wherein x is 1, 2 or 3 and R' is a hydrocarbon radical of 2-15 carbon atoms or those of the formula HO--R"O--.sub.y "' wherein y is a cardinal number between 1 and 15, R" is a hydrocarbon radical of 2-15 carbon atoms, and R"' is --H or a hydrocarbon radical of 2-20 carbon atoms,
- (b) organic ketones of the formula ##STR4## (c) organic sulfones of the formula RSOOR, (d) organic sulfoxides of the formula R.sub.2 SO,
- (e) organic nitriles of the formula RCN, or
- (f) organic amides of the formula ##STR5## wherein in formulas (b) through (f) each R can be the same as, or different from, any other R and is a hydrocarbyl group of 1-25 carbon atoms, while in the formulas in (f) R' is hydrogen or a hydrocarbyl group of 1-25 carbon atoms.
- 2. The composition of claim 1 wherein Component C is the sodium or potassium salt of an organic polymer which contains pendant carboxyl groups.
- 3. The composition of claim 1 wherein Component C is the sodium or potassium salt of a copolymer of an olefin and acrylic or methacrylic acid.
- 4. The composition of claim 1 wherein Component C is the sodium salt of a copolymer of ethylene and methacrylic acid in which at least 30% of the carboxyl groups are neutralized with sodium.
- 5. The composition of claim 1 wherein Component D is an organic ester selected from the organic esters defined in claim 1.
- 6. The composition of claims 2, 3 or 4 wherein Component D is an organic ester selected from the product of an aromatic carboxylic acid of 7-11 carbon atoms containing 1-3 carboxyl groups per aromatic nucleus and an alcohol selected from those of the formula (HOCH.sub.2 --.sub.x R' wherein x is 1, 2 or 3 and R' is alkyl of 2-10 carbon atoms when x is 1 and R' is alkylene of 2-10 carbon atoms when x is 2 or 3, or those of the formula HO--R"O--.sub.y R"' wherein y is a cardinal number of between 1 and 8, R" is alkylene of 2-8 carbon atoms and R"' is --H.
- 7. The composition of claims 2, 3 or 4 wherein Component D is an ester selected from the product of benzoic acid and an alcohol of the formula (HOCH.sub.2 --.sub.2 R' wherein R' is alkylene of 4-6 carbon atoms or HO(R"O--.sub.y H wherein R" is ethylene or propylene, and y is 2 or 3.
- 8. The composition of claims 1, 3 or 5 wherein Component B is glass fiber.
- 9. The composition of claims 1, 3 or 5 wherein Component B is glass fiber and which contains 0.1 to 1.5 percent by weight of an epoxy compound.
- 10. An article having a smooth glossy surface molded from the composition of claims 1, 2, 3, 4, or 5.
- 11. A process for manufacturing a molded article having a smooth, glossy surface which comprises shaping a composition defined in claims 1, 2, 3, 4, or 5 in a mold at a surface mold temperature of below 110.degree. C.
- 12. A molding composition which provides articles having smooth, glossy surfaces on release from a mold consisting essentially of:
- A. polyethylene terephthalate having an inherent viscosity of at least about 0.4;
- B. between about 10 and about 60 percent by weight reinforcing or filling material;
- C. a material selected from a sodium or potassium salt of a hydrocarbon acid containing between about 7 and 25 carbon atoms, or a sodium or potassium salt of an organic polymer which contains pendant carboxyl groups, said material present in an amount sufficient to provide a .DELTA.H.sub.H /.DELTA.H.sub.c ratio of less than 0.25 to a mixture of components A, B and C;
- D. A compound present in an amount sufficient to provide a Tpk at least 4.degree. C. lower than the Tkp of a mixture of components A, B and C, said compound being selected from
- (a) organic esters selected from the class consisting of
- (i) an ester of the product of benzoic acid and an alcohol of the formula (HOCH.sub.2 --.sub.2 R' wherein R' is alkylene of 4-6 carbon atoms or HO(R"O--.sub.y H wherein R" is ethylene or propylene and y is 2 or 3;
- (ii) tri-2-ethyl hexyl trimellitate;
- (iii) phenyl benzoate;
- (iv) trimethylolethane tribenzoate;
- (v) dioctylphthalate;
- (vi) diisodecylphthalate;
- (b) organic ketones of the formula ##STR6## (c) organic sulfones of the formula RSOOR, (d) organic sulfoxides of the formula R.sub.2 SO,
- (e) organic nitriles of the formula RCN, or
- (f) organic amides of the formula ##STR7## wherein the formulas (b) through (f) each R can be the same as, or different from, any other R and is a hydrocarbyl group of 1-25 carbon atoms, while in the formulas in (f) R' is hydrogen or a hydrocarbyl group of 1-25 carbon atoms.
CROSS REFERENCE TO RELATED APPLICATIONS
This application is a continuation-in-part of application Ser. No. 882,219, filed Feb. 28, 1978, now abandoned.
US Referenced Citations (7)
Foreign Referenced Citations (3)
Number |
Date |
Country |
2706128 |
Aug 1977 |
DEX |
1117139 |
Jun 1968 |
GBX |
1303606 |
Jan 1973 |
GBX |
Continuation in Parts (1)
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Number |
Date |
Country |
Parent |
882219 |
Feb 1978 |
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