| 摘要 |
Sulfur-vulcanizable rubber compositions containing sulfur-vulcanizing agent and organic vulcanization accelerating agent are inhibited from premature vulcanization by activated methylene di (thioethers) of the formula …<CHEM>… in which R is alkyl of 1-20 carbon atoms, cycloalkyl of 5-12 carbon atoms, benzyl, alpha -methylbenzyl, phenyl, or substituted phenyl wherein the substituents are lower alkyl, lower alkoxy or halo, R is R or anilino or substituted anilino wherein the substiuents are lower alkyl, lower alkoxy or halo, and R2 is phenyl or substituted phenyl as above; …<CHEM>… in which R is the same as above and X is o-phenylene or straight or branched alkylene of 2-4 chain carbon atoms; …<CHEM>… in which R is the same as above, R3 is lower alkyl or lower alkoxy, and R4 is carboalkoxy of 1-5 carbon atoms or SR …<CHEM>… |
