Co-condensation product and rubber composition containing the sa

Details Co-condensation product and rubber composition containing the sa Co-condensation product and rubber composition containing the sa

1995-03-24

1998-02-10

Truong, Duc

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

From phenol, phenol ether, or inorganic phenolate

528212, 528218, 525135, 525139, 525140, 525191, 5253325, 5253331, 5253333, 5253334, 156335, C08G 5906

Patent

active

057170533

ABSTRACT:
There is provided a co-condensation product obtainable by subjecting a p-alkylphenol to reaction with formaldehyde in the presence of an alkali catalyst to prepare a resol type condensate, and subjecting the resulting resol type condensate to reaction with a m-substituted phenol such as resorcin in the presence of an acid catalyst, wherein the content of the m-substituted phenol is not higher than 4% by weight, and the content of a component having a molecular weight not higher than 1,000 excluding both the p-alkylphenol and the m-substituted phenolis at least 25% by weight based on the total weight of the co-condensation product. This co-condensation product is low in fuming and in hygroscopic properties, exhibits excellent adhesiveness in vulcanizing adhesion between rubber and a reinforcing material, and further provides a vulcanized rubber article of high hardness.

REFERENCES:
patent: 2746898 (1956-05-01), Buckwater et al.
patent: 3596696 (1971-08-01), Freytag et al.
patent: 3963652 (1976-06-01), Tanimura et al.
patent: 4257926 (1981-03-01), Tanimura et al.
patent: 4465807 (1984-08-01), Giller et al.
patent: 5030692 (1991-07-01), Durairaj
Patent Abstracts of Japan, vol. 6, No. 224 (M-170), 9 Nov. 1982 & JP-A-57 126 643 (Sumitomo K.K.K.) 6 Aug. 1982.

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