Claims
- 1. Bis-(2,5-polythio-1,3,4-thiadiazoles) consisting of the formula: ##STR4## wherein y and x are independently selected from the group consisting of integers of from greater than 4 to 8.
- 2. The bis-(2,5-polythio-1,3,4-thiadiazoles) of claim 1 wherein x and y are both 8.
- 3. A rubber stock comprising:
- (a) a rubber selected from the group consisting of natural rubber, a synthetic rubber derived from a diene monomer and mixtures thereof;
- (b) from about 0.10 to about 10 phr of a bis-(2,5-polythio-1,3,4-thiadiazole) of the formula: ##STR5## wherein x and y are independently selected from the group consisting of integers of from greater than 4 to 8.
- 4. The rubber stock of claim 3 wherein said synthetic rubber is selected from the group consisting of cis-1,4-polyisoprene, polybutadiene, polychloroprene, copolymers of isoprene and butadiene, copolymers of acrylonitrile and butadiene, copolymers of acrylonitrile and isoprene, copolymers of styrene, butadiene and isoprene, copolymers of styrene and butadiene and blends thereof.
- 5. The rubber stock of claim 3 wherein x and y are both 8.
- 6. The rubber stock of claim 3 wherein said bis-(2,5-polythio-1,3,4-thiadiazole) is present in an amount ranging from about 0.25 phr to about 1.0 phr.
- 7. A process for accelerating the cure rate of a rubber stock comprising admixing (1) a rubber selected from the group consisting of natural rubber, synthetic rubbers derived from a diene monomer and mixtures thereof with (2) a bis-(2,5-polythio-1,3,4-thiadiazole) consisting of the formula: ##STR6## wherein x and y are independently selected from the group consisting of integers of from greater than 4 to 8.
- 8. The process of claim 7 wherein from about 0.10 phr to about 10 phr of said bis-(2,5-polythio-1,3,4-thiadiazole) is present.
- 9. The process of claim 8 wherein from about 0.25 phr to about 1.0 phr is present.
- 10. The process of claim 7 wherein said synthetic rubber is selected from the group consisting of cis-1,4-polyisoprene, polybutadiene, polychloroprene, copolymers of isoprene and butadiene, copolymers of acrylonitrile and butadiene, copolymers of acrylonitrile and isoprene, copolymers of styrene, butadiene and isoprene, copolymers of styrene and butadiene and blends thereof.
Parent Case Info
This is a divisional of application Ser. No. 07/935,324, filed on Aug. 26, 1992, now U.S. Pat. No. 5,310,921.
US Referenced Citations (4)
Foreign Referenced Citations (2)
Number |
Date |
Country |
3330919 |
Mar 1985 |
DEX |
4013714 |
Oct 1991 |
DEX |
Divisions (1)
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Number |
Date |
Country |
Parent |
935324 |
Aug 1992 |
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