| abstract |
A radiation-curable release composition is disclosed which comprises: (A) an organopolysiloxane represented by the formula (I): RSi(CH3)2-O-(Si(CH3)2O)n(Si(CH3)(R)O)mSi(CH3)2R, wherein in Formula (I), each R is -R1-O(O)C-C(R2)=CH2, -R?1-O-C(R2)=CH¿2 or (a); R1 is a hydrocarbylene group; each R2 is independently hydrogen or a methyl or ethyl group; m is a number from about 1 to about 15; and n is a number from about 50 to about 300; and (B) an organosiloxane copolymer represented by the formula (II): (R¿3?SiO)x(SiO4/2)y, wherein in Formula (II), each R is independently a hydrocarbon group or a group represented by the formula: -O(O)C-C(R?1)=CH¿2, wherein R1 is hydrogen or a methyl or ethyl group; x is a number from about 0.25 to about 75; y is a number from about 1 to about 56; and the ratio of x to y is from about 0.3:1 to about 1.5. In one embodiment, the inventive release composition further comprises (C) an acrylate represented by the formula (III): CH¿2=C(R?1)-C(O)O-R2, wherein in formula (III), R1 is hydrogen or a methyl or ethyl group, and R2 is a hydrocarbon group of about 10 to about 24 carbon atoms. A method of producing release-coated substrates, the release-coated articles thus produced, and multi-layer articles or constructions incorporating a release layer also are disclosed. When the release compositions are cured such as by radiation, the cured compositions exhibit a desirable high and controlled release force at high speeds such as the speeds utilized in label processing. |