Formed rubber article having anisotropic strength

Abstract

Abstract PURPOSE:To obtain a formed rubber article having anisotropic strength by using a composition containing a base rubber, an alpha,beta-unsaturated fatty acid metal salt and an organic peroxide and free from other orientation-imparting agent, kneading the composition under application of a shearing force in a definite direction and vulcanizing the product. CONSTITUTION:The objective formed rubber article having extremely high strength in the direction of orientation and not so high strength in different directions, especially in the direction perpendicular to the orientation direction can be produced by using a rubber composition containing (A) 100 pts.wt. of a base rubber, preferably a cis-1,4-polybutadiene having a cis-structure content of preferably >=90%, (B) 3-100 pts.wt. (preferably 10-70 pts.wt.) of a metal salt (preferably Zn salt, Mg salt, etc.) of an alpha,beta-unsaturated fatty acid (preferably 3-8C fatty acid) and (C) 0.5-5 pts.wt. (preferably 1-3 pts.wt.) of an organic peroxide (preferably dicumyl peroxide) and free from other orientation-imparting agent, kneading the rubber composition under application of a shearing force in definite direction and vulcanizing the kneaded mixture as it is in a mold.

Inventors

• 👤 Tomoko Noyama
• 👤 野山　知子
• 👤 Akihiro Nakahara
• 👤 中原　章裕

Bibliographic Details