Claims
- 1. A thermoplastic polymeric composition having improved hydrolytic stability comprising, in admixture, (a) a linear aromatic polyester of components comprising a bisphenol and a dicarboxylic acid, and (b) polyphenylene sulfide.
- 2. The composition of claim 1 wherein said dicarboxylic acid has the formula: ##STR6## wherein Z is alkylene, --Ar-- or --Ar--Y--Ar-- where Ar is aromatic, Y is alkylene, haloalkylene, --O--, --S--, --SO.sub.2 --, --SO.sub.3 --, --CO--, ##STR7## or GN<, wherein G is alkyl, haloalkyl, aryl, haloaryl, alkylaryl, haloalkylaryl, arylalkyl, haloarylalkyl, cycloalkyl or cyclohaloalkyl; and n is 0 or 1.
- 3. The composition of claim 2 wherein said dicarboxylic acid is an aromatic dicarboxylic acid.
- 4. The composition of claim 3 wherein said aromatic dicarboxylic acid is selected from the group consisting of isophthalic acid, terephthalic acid, and mixtures thereof.
- 5. The composition of claim 1 wherein said bisphenol has the formula: ##STR8## wherein Ar is aromatic, G is alkyl, haloalkyl, aryl, haloaryl, alkylaryl, haloalkylaryl, arylalkyl, haloarylalkyl, cycloalkyl, or cyclohaloalkyl; E is divalent alkylene, haloalkylene, cycloalkylene, halocycloalkylene, arylene, or haloarylene, --O--, --S--, --SO--, --SO.sub.2 --, --SO.sub.3 --, --CO--, ##STR9## or GN<; T and T' are independently selected from the group consisting of halogen, G and OG; m is an integer from 0 to the number of replaceable hydrogen atoms on E; b is an integer from 0 to the number of replaceable hydrogen atoms on Ar, and x is 0 or 1.
- 6. The composition of claim 5 wherein the bisphenol is bisphenol-A.
- 7. The composition of claim 1 wherein said linear aromatic polyester includes an aliphatic modifier.
- 8. The composition of claim 7 wherein said aliphatic modifier is a glycol of 2 to 100 carbon atoms.
- 9. The composition of claim 8 wherein said glycol is selected from the group consisting of neopentyl glycol, diethylene glycol, ethylene glycol, and mixtures thereof.
- 10. The composition of claim 1 wherein said polyphenylene sulfide has a melt flow index in the range of from about 40 to about 7000.
- 11. The composition of claim 1 wherein the aromatic polyester is prepared by a melt polymerization technique.
- 12. The composition of claim 1 which also includes a filler material.
- 13. The composition of claim 12 wherein said filler material is particulate glass.
- 14. The composition of claim 1 wherein the filler material is glass fiber present in an amount of about 5 to about 70 weight percent based on the combined weight of the polyester and the phenylene sulfide polymer.
- 15. The composition of claim 14 wherein the glass fiber contains an organic coupling agent.
- 16. The composition of claim 15 wherein said organic couplic agent is a silane.
- 17. The composition of claim 1 wherein said polyphenylene sulfide is present in an amount of from about 5 to about 95 parts by weight based on 100 parts by weight of admixture.
- 18. The composition of claim 17 wherein said polyphenylene sulfide is present in an amount of from about 5 to about 30 parts by weight based on 100 parts by weight of admixture.
- 19. A molded article formed from the composition of claim 1.
- 20. A molded article formed from the composition of claim 11.
- 21. A molded article formed from the composition of claim 13.
- 22. A process for improving the hydrolytic stability of a linear aromatic polyester resin which comprises adding from about 5 to about 95 parts by weight of polyphenylene sulfide by weight of mixture to said resin.
CROSS-REFERENCE TO COPENDING APPLICATION
This is a continuation of application Ser. No. 905,623, filed May 12, 1978, now abandoned, which is a continuation in part of U.S. Application Ser. No. 863,555, filed Dec. 22, 1977, now abandoned, which is a continuation in part of Ser. No. 819,539 filed July 27, 1977 now abandoned.
US Referenced Citations (7)
Foreign Referenced Citations (5)
Number |
Date |
Country |
49-34945 |
Mar 1974 |
JPX |
49-34946 |
Mar 1974 |
JPX |
51-59952 |
May 1976 |
JPX |
52-25852 |
Feb 1977 |
JPX |
55-18743 |
May 1980 |
JPX |
Non-Patent Literature Citations (2)
Entry |
Ency. of Poly. Sci. & Tech., vol. 10, pp. 98, 101, 726, 735-759, 653-659. |
Platzer, Editor, Polymerization Reactions and New Polymers, (ACS 1973), pp. 80-104. |
Continuations (1)
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Number |
Date |
Country |
Parent |
905623 |
May 1978 |
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Continuation in Parts (2)
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Number |
Date |
Country |
Parent |
863555 |
Dec 1977 |
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Parent |
819539 |
Jul 1977 |
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