| 摘要 |
Novel copolymeric silicones including repeat units of the formula Ra1Rb2SiO(4-a-b)/2 (I) and repeat units of the formula Ra3Rb4SiO(4-a-b)/2 (II) where R1, R2 and R3 are the same or different alkyl, haloalkyl, aryl, substituted aryl, alkoxy or aryloxy groups; R4 is <IMAGE> where R5 is H or alkyl and R6 is an unsaturated divalent hydrocarbon group; a is an integer from 0-2, b is an integer from 1-3 and a+b=1, 2 or 3; and the repeat units of formula II represent no more than about 30% of the total copolymer repeat units. The copolymers may be rapidly cured by UV light to give useful elastomers or coating films. They may also be cured with traditional peroxide methods including heat and anaerobic activated methods. They are readily prepared by hydrosilation of acrylate or 2-alkylacrylate esters of acetylenic alcohols with SiH functional silicones.
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