Radiation-curable organopolysiloxane release compositions

US5616629A · kind A · utility

Assignee

• Avery Dennison Corporation · US

Inventors

• Thanh Van Nguyen · El Monte, US
• John K. Allen · Batavia, US
• Qun Yu · Beijing, CN

Key dates

• Filing date: Feb 27, 1995
• Grant date: Apr 1, 1997
• Expiry date: Feb 27, 2015

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C09J2483/005
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

A radiation-curable release composition is disclosed which comprises: PA1 (A) an organopolysiloxane represented by the formula EQU RSi(CH.sub.3).sub.2 --O--(Si(CH.sub.3).sub.2 O).sub.n (Si(CH.sub.3)(R)O).sub.m Si(CH.sub.3).sub.2 R (I) PA1 wherein in Formula (I), each R is --R.sup.1 --O(O)C--C(R.sup.2).dbd.CH.sub.2, --R.sup.1 --O--C(R.sup.2).dbd.CH.sub.2 or is derived from an organic molecule containing both ethylenic unsaturation and epoxide functionality; R.sup.1 is a hydrocarbylene group; each R.sup.2 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 PA1 (B) an organosiloxane copolymer represented by the formula EQU (R.sub.3 SiO).sub.x (SiO.sub.4/2).sub.y (II) PA1 wherein in Formula (II), each R is independently a hydrocarbon group or a group represented by the formula EQU --O(O)C--C(R*).dbd.CH.sub.2 PA1 wherein R* 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 PA1 (C) an acrylate repre…