Novel Means to Improving Low Temperature Mechanical Properties in a Silicone Elastomer

摘要

Historically,high molecular weight phenyl substituted dimethyl siloxane polymers have been used to achieve good low temperature mechanical properties in silicone elastomers.We have found that improved low temperature properties can be achieved through incorporation of a low MW diphenyl dimethyl vinyl terminated copolymer into a conventional dimethyl gum.Heat aging properties of the modified polymer system were also evaluated in a commercial formulation.