Claims
- 1. A rubber mixture which is vulcanizable and has improved adhesion to reinforcing supports based on steel cord or textile fibers and comprising vulcanizable rubber, curing agents, fillers and modified novolak as adhesion promotor, the latter is prepared by simultaneous reaction of mononuclear polyhydric phenols with aldehydes and unsaturated compounds selected from the group consisting of
- (1) terpene natural products;
- (2) natural compounds selected from the group consisting of fatty acids, fatty oils derived therefrom, fatty amides and fatty alcohols;
- (3) synthetic hydrocarbon compounds selected from the group consisting of alkenes, dienes, acetylene, (C.sub.1 -C.sub.10) alkylacetylenes and di-(C.sub.1 -C.sub.10)-alkylacetylenes;
- in the presence of an acid catalyst at elevated temperatures and does not contain any residual starting phenols.
- 2. A rubber mixture of claim 1 wherein the adhesion promotor was prepared from resorcinol, the aldehyde of 1 to 10 carbon atoms and an unsaturated compound.
- 3. A rubber mixture of claim 1 wherein the adhesion promotor was prepared from resorcinol, formaldehyde or a compound releasing formaldehyde and the unsaturated compound.
- 4. A rubber mixture of claim 1 wherein the molar ratio of mononuclear polyhydric phenols:unsaturated compounds:aldehydes during the preparation of the adhesion promotor is 1:0.1:0.3 to 1:1.5:0.95.
- 5. A rubber mixture of claim 1 wherein the molar ratio of polyhydric phenols:unsaturated compounds:aldehydes during the preparation of the adhesion promotors is: 1:0.4:0.5 to 1:1.1 0.8.
- 6. A rubber mixture of claim 1 which contains up to 20% by weight of adhesion promotor, relative to the vulcanizable rubber mixture.
- 7. A method of preparing an industrial rubber article containing reinforcing supports based on steel cord or textile fibers comprising vulcanizing a rubber mixture of claim 1 to said reinforcing supports.
- 8. The method of claim 7 wherein the industrial rubber article is selected from the group consisting of tubings, fan belts, conveyor belts and tires.
- 9. An industrial rubber article containing reinforcing supports based on steel cord or textile fibers by vulcanizing a rubber mixture of claim 1 to said reinforcing supports.
- 10. A vulcanized product of the rubber mixture of claim 1.
- 11. A rubber mixture which is vulcanizable and has improved adhesion to reinforcing supports based on steel cord or textile fibers and comprising vulcanizable rubber, curing agents, fillers and modified novolak as adhesion promotor, the latter is prepared by simultaneous reaction of mononuclear polyhydric phenols with aldehydes and unsaturated compounds selected from the group consisting of fatty acids, fatty oils derived therefrom, fatty amides, fatty alcohols, turpentine oil, rosin, .alpha.-pinene, butene, isobutene, isooctene, isononene, isododecene, butadiene, isoprene, chloroprene, dichlorobutadiene, dicyclopentadiene and acetylene in the presence of an acid catalyst at elevated temperatures and does not contain any residual free starting phenols.
Priority Claims (1)
Number |
Date |
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30 01 606.4 |
Jul 1990 |
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PRIOR APPLICATION
This is a continuation of U.S. patent application Ser. No. 134,286 filed Oct. 8, 1993, which is a continuation of U.S. patent application Ser. No. 891,395 filed May 29, 1992, both now abandoned which is a continuation-in-part of U.S. patent application Ser. No. 641,659 filed Jan. 15, 1991, now abandoned.
US Referenced Citations (7)
Continuations (2)
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Date |
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134286 |
Oct 1993 |
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Parent |
891395 |
May 1992 |
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Continuation in Parts (1)
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641659 |
Jan 1991 |
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