Rubber compositions having improved processability

Details Rubber compositions having improved processability Rubber compositions having improved processability

C - Chemistry, Metallurgy

08

L

400/1116, 6/128,

C08L 7/00 (2006.01) C08K 5/372 (2006.01) C08L 9/00 (2006.01)

Patent

CA 2018081

24-51(7573)A RUBBER COMPOSITIONS HAVING IMPROVED PROCESSABILITY Abstract Alkylthioalkanoic acids, salts or esters having the formula Image where R1 represents an alkyl or alkenyl group, or a hydroxy- or alkoxy- substituted alkyl or alkenyl group, said group containing (apart from the alkoxy carbon atoms in an alkoxy-substituted alkyl or alkenyl group) from 4 to 22 carbon atoms, R2 represents hydrogen, a metallic or other cationic group, or an esterifying group, each of R3 and R4 represents independently hydrogen or an alkyl group, and x has a value of from 1 to 10, act as viscosity- modifying agents in unvulcanised rubber compositions. Compared with conventional processing aids, they improve the processing characteristics of unvulcanised rubber compositions and can have beneficial effect on the physical properties of vulcanisates obtained by the vulcanisation of such compositions.

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