Claims
- 1. A poly(phenylene sulfide) resin composition which comprises:
- 100 parts by weight of a poly(phenylene sulfide) resin that has been cured by heating it in a non-oxidative, inert gas in the absence of oxygen at temperatures within the range of from about 200.degree. C. to about 270.degree. C.; and
- 10-200 parts by weight of glass fibers exhibiting a weight loss of not greater than 0.7% by weight when heated at a temperature of 330.degree. C. for a period of 1 hour, and
- said poly(phenylene sulfide) resin having, before curing, a melt viscosity of not less than 400 poises as measured in a KOHKA type flow tester at a temperature of 300.degree. C. and a load of 10 kg using a die of 0.5 mm diameter and 2.0 mm length.
- 2. A composition as claimed in claim 1 wherein said poly(phenylene sulfide) resin comprises about 70 mole % or more of structural units represented by the formula: ##STR4##
- 3. A composition as claimed in claim 2 wherein said poly(phenylene sulfide) resin comprises further 30 mole % or less of other copolymerized structural units.
- 4. A composition as claimed in claim 1 wherein said poly(phenylene sulfide) resin is blended with one or more polymers selected depending on the intended final application of said composition.
- 5. A composition as claimed in claim 1 which further comprises one or more additives and/or fillers commonly used in the conventional poly(phenylene sulfide) compositions.
- 6. A composition as claimed in claim 1 wherein said poly(phenylene sulfide) resin has, after curing, an increased melt viscosity of about 500-20,000 poises.
- 7. A method for preparing a poly(phenylene sulfide) resin composition less liable to discoloration and exhibiting excellent ductilities, which comprises the steps of:
- heating a poly(phenylene sulfide) resin in a non-oxidative, inert gas in the absence of oxygen at temperatures within the range of about 200.degree.-270.degree. C. so as to cure said resin, said resin having, before curing, a melt viscosity of not less than 400 poises as measured in a KOHKA type flow tester at a temperature of 300.degree. C. and a load of 10 kg using a die of 0.5 mm diameter and 2.0 mm length; and
- mixing the cured resin with a glass fiber reinforcement exhibiting a weight loss of not greater than 0.7% by weight on heating at a temperature of 330.degree. C. for a period of 1 hour, in relative proportions of 100 parts by weight of said resin and 10-200 parts by weight of said glass fiber reinforcement.
- 8. A method as claimed in claim 7 in which the heating step is conducted until the cured resin has an increased melt viscosity in the range of about 500-20,000 poises as measured under the conditions as defined above.
- 9. A method as claimed in claim 7 in which the heating step is conducted for a period of from about 10 minutes up to about 24 hours.
- 10. Moldings formed from the composition as claimed in any one of claims 1-6.
Priority Claims (1)
Number |
Date |
Country |
Kind |
1-175538 |
Jul 1989 |
JPX |
|
Parent Case Info
This is a continuation of application No. 07/550,582 filed Jul. 10, 1990, now abandoned.
US Referenced Citations (8)
Foreign Referenced Citations (4)
Number |
Date |
Country |
0272812 |
Jun 1988 |
EPX |
0309916 |
Apr 1989 |
EPX |
453368 |
Jan 1970 |
JPX |
1-121327 |
May 1989 |
JPX |
Continuations (1)
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Number |
Date |
Country |
Parent |
550582 |
Jul 1990 |
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