Patent ID: 6277941
Filing Date: 2001-08-21
Classification: C09D

Abstract:
An organopolysiloxane composition comprising:(1) 100 parts by weight of an organopolysiloxane having at least two unsaturated groups per molecule,(2) 0.1-30 parts by weight of a liquid organohydrogenpolysiloxane having at least two.ident.Si-H bonds per molecule,(3) 0.1-6.0 parts by weight of an addition reaction control agent prepared by mixing (a) an acetylene alcohol represented by the following structural formula (I) and (b) a silylated acetylene alcohol represented by the following structural formula II, wherein both acetylene alcohol and silylated acetylene alcohol have a boiling point of 170.degree. C. or below or a boiling point of 130.degree. C. or above at atmospheric pressure, and the (b)/(a) ratio ranges from greater than 5 to no greater than 100 on a weight basis; ##STR7##wherein R.sup.1 and R.sup.2 are each a hydrogen atom or a group selected from alkyl groups or aryl groups, ##STR8##wherein R.sup.3 and R.sup.4 are each a hydrogen atom or a group selected from alkyl groups or aryl groups, and R.sup.5 is an alkyl or aryl group, and(4) a catalytic amount of a platinum metal catalyst.