| 摘要 |
<p>The present invention provides a fluorine-containing elastomer composition of which viscosity can be decreased without increasing an amount of expensive monomer while maintaining physical properties in normal state of a branched fluorine-containing elastomer. The composition is a peroxide-crosslinkable fluorine-containing elastomer composition comprising (A) a branched fluorine-containing elastomer having peroxide-crosslinkable cure site, which has a number average molecular weight of from 1,000 to 300,000 and a Mark-Houwink gradient "a" of less than 0.6 when an absolute weight molecular weight and an intrinsic viscosity are plotted on a Mark-Houwink plot having an axis of abscissa of absolute weight molecular weight and an axis of ordinate of intrinsic viscosity, and (B) a straight chain type fluorine-containing polymer having a number average molecular weight of from 1,000 to 250,000 and a Mark-Houwink gradient "a" of not less than 0.6.</p> |
