Polyorganosiloxane-based graft copolymer and process for producing same.

摘要

A polyorganosiloxane-based graft copolymer superior in impact resistance, light resistance, surface gloss, and color fastness, produced by graft-polymerizing at least one vinyl monomer on a polyorganosiloxane consisting of

90 to 99.999 mole % of an organosiloxane having a unit represented by the general formula
<Chemistry id="chema01" num="0001"><Image id="ia01" he="6" wi="86" file="IMGA0001.TIF" imgContent="chem" imgFormat="TIFF" inline="no" /></Chemistry>
wherein;
<UnorderedLists id="ula01" listStyle="none"><ListItem>R denotes hydrogen, methyl, ethyl, propyl, or phenyl; and</ListItem><ListItem>n denotes a number of 0, 1, or 2; and</ListItem><ListItem>10 to 0.001 mole % of an organosiloxane graft-linking agent having a unit represented by the general formula
<Chemistry id="chema02" num="0002"><Image id="ia02" he="16" wi="87" file="IMGA0002.TIF" imgContent="chem" imgFormat="TIFF" inline="no" /></Chemistry>wherein;</ListItem><ListItem>R denotes hydrogen, methyl, ethyl, propyl, or phenyl;</ListItem><ListItem>n denotes a number of 0, 1, or 2; and</ListItem><ListItem>p denotes a number of 1 to 6;</ListItem><ListItem>the graft copolymer containing the polyorganosiloxane</ListItem></UnorderedLists>
in an amount of 1 to 70% by weight; and a process for producing the graft copolymer.