| 摘要 |
PURPOSE:The titled rubber composition, obtained by blending a hydrogenated nitrile rubber as a matrix with a given amount of aromatic polyamide short fibers and capable of producing V-shaped transmission belts having improved lateral pressure and heat aging resistance. CONSTITUTION:A short fiber-containing rubber composition obtained by blending (A) 100pts.wt. hydrogenated nitrile rubber having <=98%, preferably >=80% hydrogenation ratio and <=60 Mooney viscosity with (B) 0.5-5pts.wt. sulfur and 0.5-5pts.wt. crosslinking accelerator, e.g. di-o-tolylguanidine, (C) 5-50pts.wt. preferably <=20pts.wt. phenolic resin and >=0.3pts.wt. (5-10wt% based on the phenolic resin) curing agent for the phenolic resin, preferably hexamethylenetetramine and (D) <=13vol%, expressed in terms of volume fraction, aromatic polyamide short fibers having preferably 1-10mm, particularly 3-6mm fiber length and kneading the resultant mixture.
|
