Claims
- 1. A process for producing a fiber-reinforced rubber composition comprising the steps of:
- mixing vulcanizable rubber, 1 to 70 parts by weight of a fiber-forming polyamide based on 100 parts by weight of the vulcanizable rubber, said polyamide having ##STR22## groups and having a number-average molecular weight of less than 200,000, and 0.2 to 2.5 parts by weight, based on 100 parts by weight of the total amount of the rubber and the polyamide, of a resol alkylphenol formaldehyde resin precondensate together at a temperature of not less than the melting point of the polyamide, but not more than 270.degree. C.;
- extruding the mixture from an extruder at a temperature of not less than the melting point of the polyamide, but not more than 270.degree. C.; and
- drawing an extrudate at a temperature of less than the melting point of the polyamide.
- 2. A process as claimed in claim 1, wherein the melting point of said polyamide is 190.degree. C. to 235.degree. C.
- 3. A process as claimed in claim 1, wherein the resol alkylphenol formaldehyde resin precondensate has the general formula: ##STR23## wherein R is an alkyl group having 1 to 15 carbon atoms, or a combination of said alkyl group and a hydrogen atom; X is a hydroxyl group or a halogen atom; m is 1 or 2; and n is a number of 2 to 15.
- 4. A process as claimed in claim 3, wherein X is chlorine or bromine.
Priority Claims (3)
Number |
Date |
Country |
Kind |
58-176428 |
Nov 1981 |
JPX |
|
57-18185 |
Feb 1982 |
JPX |
|
57-151687 |
Sep 1982 |
JPX |
|
Parent Case Info
This application is a division of copending prior application Ser. No. 788,524, filed Oct. 21, 1985, now U.S. Pat. No. 4,703,086, which was a continuation of prior application Ser. No. 439,176, filed Nov. 4, 1982, now abandoned.
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Schichman et al. |
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4703086 |
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Oct 1987 |
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Divisions (1)
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Number |
Date |
Country |
Parent |
788524 |
Oct 1985 |
|
Continuations (1)
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Number |
Date |
Country |
Parent |
439176 |
Nov 1982 |
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