Polymodal-cure silicone composition, and method of making the same
First Claim
1. An acryloxy-functional capped silicone, formed as a non-hydrolysis reaction product of:
- (i) a silyl diacrylate compound of the formula;
##STR23## wherein;
R1, R2, R3, R4, R5, R6, R7, R8, R9, and R10 are independently selected from hydrogen, halo, and organo radicals; and
n is an integer having a value of from 1 to 4; and
(ii) a silicone having;
(A) functionality which is reactive with an acryloxy functionality of said silyl diacrylate compound to yield said acryloxy-functional capped silicone which is partially curable under first curing conditions comprising curingly effective radiation exposure optionally in the presence of a photoinitiator; and
(B) additional functionality which renders said acryloxy-functional capped silicone partially curable by second curing conditions different from the curingly effective radiation exposure of the first curing conditions.
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Abstract
An acryloxy-functional capped silicone formed as a reaction product of:
(i) a silyl diacrylate compound of the formula ##STR1## wherein: R1, R2, R3, R4, R5, R6, R7, R8, R9, and R10 are independently selected from hydrogen, halo, and organo radicals; and n is an integer having a value of from 1 to 4; and
(ii) a silicone having (A) functionality which is reactive with an acryloxy functionality of the silyl diacrylate compound, and (B) additional functionality imparting (directly or by reaction with a co-reactant) further curability to the silicone by another modality (e.g., moisture curability, heat curability, etc.)
The capped polyfunctional silicone may suitably be formulated with (a) an effective amount of a photoinitiator for partial curing of the acryloxy-functional capped silicone under photoinitiating curing conditions, and (b) suitable curatives, initiators, accelerators, etc., as necessary or desirable for further curing by other cure mechanisms dissociated with the additional functionality (ii) (B). The compositions of the invention are usefully employed as adhesives, sealants, conformal coatings, potting materials, and the like.
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Citations
32 Claims
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1. An acryloxy-functional capped silicone, formed as a non-hydrolysis reaction product of:
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(i) a silyl diacrylate compound of the formula;
##STR23## wherein;
R1, R2, R3, R4, R5, R6, R7, R8, R9, and R10 are independently selected from hydrogen, halo, and organo radicals; andn is an integer having a value of from 1 to 4; and (ii) a silicone having; (A) functionality which is reactive with an acryloxy functionality of said silyl diacrylate compound to yield said acryloxy-functional capped silicone which is partially curable under first curing conditions comprising curingly effective radiation exposure optionally in the presence of a photoinitiator; and (B) additional functionality which renders said acryloxy-functional capped silicone partially curable by second curing conditions different from the curingly effective radiation exposure of the first curing conditions. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23)
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24. A method of capping
(i) a silicone having (A) functionality which is cappable by the silyl diacrylate compound of formula (I) below, and (B) additional functionality which renders, or is reactive with another component to yield a functionality which renders, the capped silicone partially curable by curing conditions other than radiation exposure, with (ii) acrylic functionality to render the silicone photocurable in character, said method comprising non-hydrolyzingly reacting the cappable functionality (A) of said silicone with a silyl diacrylate compound of the formula: - ##STR30## wherein;
R1, R2, R3, R4, R5, R6, R7, R8, R9, and R10 are independently selected from hydrogen, halo, and organo radicals, andn is an integer of from 1 to 4. - View Dependent Claims (25, 26, 27, 28, 29, 30, 31, 32)
- ##STR30## wherein;
Specification