| abstract |
This invention relates to the improvement of rubber-to-metal adhesion and adhesion retention in sulfur vulcanizable, metal reinforced rubber compositions via the use of substituted pyrimidine and triazine adhesion promoters of Structure (I). (* CHEMICAL STRUCTURE *) (I) wherein A is N or C-H, X, Y and Z are independently selected from the group consisting of chloro, (* CHEMICAL STRUCTURE *) wherein R1 may be hydrogen, chloro, acyl, or C1-C12 alkyl; R2 may be hydrogen, C1-C12 alkyl, chloro, hydroxy, alkoxy, or anilino; R3 may be hydrogen, C1-C4 alkyl or phenyl; R4 may be hydrogen, C1-C8 alkyl, cyclohexyl, C1-C12 hydroxylalkyl, or C1-C12 alkoxyalkyl; R5 may be hydrogen, C1-C4 alkyl, cyclohexyl, or C1-C12 hydroxyalkyl; with the proviso that Z may not be chloro when both X and Y are chloro. |