UV and moisture-curable organopolysiloxane compositions, cured products therof, and method for making
First Claim
1. A UV and moisture-curable organopolysiloxane composition comprising(i) an organopolysiloxane terminated with a radical of the formula (1):
- ##STR17## wherein R1 is a hydrogen atom or a substituted or unsubstituted monovalent hydrocarbon radical, each of R2 and R3 is a substituted or unsubstituted divalent hydrocarbon radical which may contain a NH bond or ether bond, each of R4 and R5 is a substituted or unsubstituted monovalent hydrocarbon radical which may contain an ether bond, and letter a is equal to 0 or 1,(ii) a photo-polymerizable initiator, and(iii) a curing catalyst.
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Accused Products
Abstract
A UV and moisture-curable organopolysiloxane composition comprising (i) an organopolysiloxane terminated with a radical of formula (1): ##STR1## wherein R1 is a hydrogen atom or monovalent hydrocarbon radical, each of R2 and R3 is a divalent hydrocarbon radical which may contain a NH bond or ether bond, each of R4 and R5 is a monovalent hydrocarbon radical which may contain an ether bond, and a is equal to 0 or 1, (ii) a photo-polymerization initiator, and (iii) a curing catalyst. The composition readily cures either upon exposure to UV radiation or upon contact with moisture and from the surface to the deep interior within a short time, yielding cured products having satisfactory physical properties.
32 Citations
19 Claims
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1. A UV and moisture-curable organopolysiloxane composition comprising
(i) an organopolysiloxane terminated with a radical of the formula (1): - ##STR17## wherein R1 is a hydrogen atom or a substituted or unsubstituted monovalent hydrocarbon radical, each of R2 and R3 is a substituted or unsubstituted divalent hydrocarbon radical which may contain a NH bond or ether bond, each of R4 and R5 is a substituted or unsubstituted monovalent hydrocarbon radical which may contain an ether bond, and letter a is equal to 0 or 1,
(ii) a photo-polymerizable initiator, and (iii) a curing catalyst. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
- ##STR17## wherein R1 is a hydrogen atom or a substituted or unsubstituted monovalent hydrocarbon radical, each of R2 and R3 is a substituted or unsubstituted divalent hydrocarbon radical which may contain a NH bond or ether bond, each of R4 and R5 is a substituted or unsubstituted monovalent hydrocarbon radical which may contain an ether bond, and letter a is equal to 0 or 1,
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12. A method for preparing a UV and moisture-curable organopolysiloxane composition comprising the steps of:
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reacting (A) an organopolysiloxane terminated with a silanol radical with (B) an aminoalkylalkoxysilane of the formula (2);
##STR18## wherein R3 is a substituted or unsubstituted divalent hydrocarbon radical which may contain a NH bond or ether bond, each of R4 and R5 is a substituted or unsubstituted monovalent hydrocarbon radical which may contain an ether bond, and letter a is equal to 0 or 1,such that the molar ratio of alkoxy radical in component (B) to silanol radical in component (A) may be at least 1, to thereby form an organopolysiloxane terminated with an aminoalkyl radical of the formula (3);
##STR19## wherein R3, R4, and R5 and a are defined above and a hydrolyzable alkoxy radical;reacting the organopolysiloxane terminated with an aminoalkyl radical with (C) a compound of the formula (4);
##STR20## wherein R1 is a hydrogen atom or a substituted or unsubstituted monovalent hydrocarbon radical, and R2 is a substituted or unsubstituted divalent hydrocarbon radical which may contain a NH bond or ether bond,such that the molar ratio of amino radical in the radical of formula (3) to NCO radical in component (C) may be at least 0.9, to thereby form an organopolysiloxane terminated with a radical of the formula (1);
##STR21## wherein R1, R2, R3, R4, R5, and a are defined above; andmixing said organopolysiloxane terminated with a radical of formula (1) with a photo-polymerization initiator and a curing catalyst. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19)
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Specification