Radiation-curable release compositions
First Claim
1. A radiation-curable release composition, comprising:
- (A) an organopolysiloxane represented by the formula
space="preserve" listing-type="equation">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)wherein in Formula (I), each R is --R1 --O(O)C--C(R2)═
CH2, --R1 --O--C(R2)═
CH2 or ##STR4## R1 is a hydrocarbylene group;
each R2 is independently hydrogen or a methyl or ethyl group;
m is a number from 1 to about 15; and
n is a number from about 50 to about 300; and
(B) an organosiloxane polymer represented by the formula
space="preserve" listing-type="equation">(R.sub.3 SiO)(Si(CH.sub.3).sub.2 O).sub.n (SiR.sub.3) (II)wherein in Formula (II), each R is independently a hydrocarbon group and n is a number in the range of about 1000 to about 20,000.
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Abstract
A radiation-curable release composition is disclosed which comprises:
(A) an organopolysiloxane represented by the formula
RSi(CH.sub.3).sub.2 --O--(Si(CH.sub.3).sub.2 O).sub.n
(Si(CH3)(R)O)m Si(CH3)2 R (I)
wherein in Formula (I), each R is --R1 --O(O)C--C(R2)═CH2, --R1 --O--C(R2)═CH2 or ##STR1## 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 polymer represented by the formula
(R.sub.3 SiO)(Si(CH.sub.3).sub.2 O).sub.n (SiR.sub.3)
wherein in Formula (II), each R is independently a hydrocarbon group and n is a number in the range of about 1000 to about 20,000. 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.
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Citations
20 Claims
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1. A radiation-curable release composition, comprising:
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(A) an organopolysiloxane represented by the formula
space="preserve" listing-type="equation">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)wherein in Formula (I), each R is --R1 --O(O)C--C(R2)═
CH2, --R1 --O--C(R2)═
CH2 or ##STR4## R1 is a hydrocarbylene group;
each R2 is independently hydrogen or a methyl or ethyl group;
m is a number from 1 to about 15; and
n is a number from about 50 to about 300; and(B) an organosiloxane polymer represented by the formula
space="preserve" listing-type="equation">(R.sub.3 SiO)(Si(CH.sub.3).sub.2 O).sub.n (SiR.sub.3) (II)wherein in Formula (II), each R is independently a hydrocarbon group and n is a number in the range of about 1000 to about 20,000. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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18. A radiation-curable release composition, comprising:
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(A) an organopolysiloxane represented by the formula
space="preserve" listing-type="equation">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)wherein in Formula (I), R is --(CH2)6 OC(O)CH═
CH2 ;
m is a number from about 2 to about 10; and
n is a number from about 75 to about 125; and(B) an organosiloxane polymer represented by the formula
space="preserve" listing-type="equation">(R.sub.3 SiO)(Si(CH.sub.3).sub.2 O).sub.n (SiR.sub.3) (II)wherein in Formula (II), each R is independently a hydrocarbon group and n is a number in the range of about 1000 to about 20,000.
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19. A radiation-curable release composition, comprising:
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(A) an organopolysiloxane represented by the formula
space="preserve" listing-type="equation">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)wherein in Formula (I), R is --(CH2)6 OC(O)CH═
CH2 ;
m is about 6; and
n is about 136; and(B) an organosiloxane polymer represented by the formula
space="preserve" listing-type="equation">(R.sub.3 SiO)(Si(CH.sub.3).sub.2 O).sub.n (SiR.sub.3) (II)wherein in Formula (II), each R is independently a hydrocarbon group and n is a number in the range of about 1000 to about 20,000.
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20. A radiation-curable release composition, comprising:
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(A) an organopolysiloxane represented by the formula
space="preserve" listing-type="equation">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)wherein in Formula (I), R is --(CH2)6 OC(O)CH═
CH2 ;
m is about 2; and
n is about 100; and(B) an organosiloxane polymer represented by the formula
space="preserve" listing-type="equation">(R.sub.3 SiO)(Si(CH.sub.3).sub.2 O).sub.n (SiR.sub.3) (II)wherein in Formula (II), each R is independently a hydrocarbon group and n is a number in the range of about 1000 to about 20,000.
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Specification