CEMENT FOR MODIFICATION OF RUBBER ARTICLES AND PROCESS FOR PRODUCTION THEREOF

摘要

A process for production of a rubber cement for modification of rubber articles which comprises 100 parts by weight of a rubber component and 100 to 500 parts by weight of an inorganic filler, comprising the first step of kneading a rubber component and rubber compounding ingredients under the conditions of 0 to 20 wt% of an inorganic filler per 100 parts by weight of the rubber component and the second step of conducting in a closed kneader (1) kneading of the resulting system and the residual inorganic filler or (2) solution mixing of the resulting system with a master batch of the inorganic filler. According to the process, a cement for modification of rubber articles can be efficiently produced, the solid matter of which has a higher specific gravity than that attained by blending a large amount of an inorganic filler having a high specific gravity and which can give coating film improved in thermal degradation resistance.