Rubber mixtures and vulcanized compounds prepared therefrom havi

Details Rubber mixtures and vulcanized compounds prepared therefrom havi Rubber mixtures and vulcanized compounds prepared therefrom havi

1994-10-17

1995-06-20

Clark, W. Robinson

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

Synthetic resins

Mixing of two or more solid polymers; mixing of solid...

5251335, 525134, 525149, 428460, C08L 6106, C08L 6114, C08L 702

Patent

active

054261520

ABSTRACT:
Preparation of vulcanizable rubber mixtures and vulcanized compounds thereof having improved adhesion to reinforcing supports based on steel cord and textile fibers, in which effective amounts of modified novolaks are added to the rubber mixtures as adhesion promotors, which are prepared by simultaneous reaction of polyhydric phenols with aldehydes and unsaturated hydrocarbons with acid catalysis at elevated temperature and do not contain any troublesome proportions of free starting phenols. Rubber mixtures according to the invention can be processed in an easy advantageous manner without liberating toxic substances which might be detrimental to persons working in processing and/or to the environment. Rubber mixtures according to the invention which can be prepared, processed and vulcanized by known methods by thorough mixing of the components are highly suitable for the manufacture of industrial rubber articles containing reinforcing supports based on steel cord and textile fibers such as, for example, tubings, fan belts, conveyor belts and tires, the resulting vulcanized compounds having excellent adhesion properties to the reinforcing supports mentioned in combination with a surprisingly good constancy of properties upon exposure to moisture.

REFERENCES:
patent: 3625874 (1971-12-01), Cottman
patent: 3644537 (1972-02-01), Dannels et al.
patent: 3808018 (1974-04-01), Plueddemann
patent: 3955036 (1976-05-01), Plueddemann
patent: 3981851 (1976-09-01), Plueddemann
patent: 4719255 (1988-01-01), Yoshizumi et al.
patent: 5314986 (1994-05-01), Ooms et al.

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