Organopolysiloxanes having silethylene linkages and a curable co

Details Organopolysiloxanes having silethylene linkages and a curable co Organopolysiloxanes having silethylene linkages and a curable co

1993-06-29

1994-10-18

Dean, Ralph H.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

From silicon reactant having at least one...

528 31, 522 99, C08G 7720

Patent

active

053570235

ABSTRACT:
A novel organopolysiloxane compound having, in a molecule, at least one silyl-substituted ethyl group of the general formula ##STR1## in which R.sup.1 is a hydrogen atom or a methyl group, R is a monovalent hydrocarbon group and the subscripts a is 2 or and b is 1, 2 or 3, or a linear organopolysiloxane having, at each molecular chain end, at least one of such a group, can be prepared by first reacting a vinyl-containing organopolysiloxane with a hydrogen chlorosilane compound to effect the hydrosilation reaction between the silicon-bonded vinyl groups and the silicon-bonded hydrogen atoms and then the silicon-bonded chlorine atoms are subjected to a dehydrochlorination reaction with a silanol compound of the general formula ##STR2## A composition comprising the organopolysiloxane and a photopolymerization initiator is highly sensitive to light and readily cured into a rubbery elastomer by irradiation with ultraviolet light.

REFERENCES:
patent: 4504629 (1985-03-01), Lien et al.
patent: 4575546 (1986-03-01), Klemarczyk et al.
patent: 4631321 (1986-12-01), Suzuki
patent: 4683278 (1987-07-01), Suzuki

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