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US 4,837,289 AGranted
UV- and heat curable terminal polyvinyl functional macromers and polymers thereof
AssigneeCiba-Geigy Corporation
InventorsKarl F. Mueller, Paul Harisiades
Life of this patent
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Abstract
New polysiloxanes are described which bear at least three vinyl groups. Such polyvinyl polysiloxanes are useful as heat or UV curing resins with high cross link density and are especially useful as coatings and in the manufacture of contact lens materials.
Claims25
A poly-unsaturated polysiloxane of the formula:
- ##STR23## wherein a is zero or 1;
- n is 2 to about 500;
- m is zero to 2;
- where a and m are not both zero at the same time;
- at least three of A either consists of a reactive vinyl containing group of the formula ##STR24## where R.sup.4 is arylene of 6 to 12 carbon atoms, alkarylene of 7 to 14 carbon atoms, alkylene of up to 8 carbon atoms, alkyleneoxy of up to 8 carbon atoms or a group of the formula ##STR25## where R.sup.7 is alkylene of 2 to 8 carbon atoms, x is zero or 1, Y is --O-- or --NR.sup.8 -- where R.sup.8 is hydrogen or alkyl of up to 4 carbon atoms, and R.sup.6 is the diradical residue of an aliphatic, cycloaliphatic, aromatic or araliphatic diisocyanate;
- and R.sup.5 is hydrogen or methyl;
- and the remaining A are hydrogen or said reactive vinyl containing group;
- R.sup.1 is alkyl of up to 4 carbon atoms or phenyl;
- R.sup.2 is alkylene of 2 to 6 carbon atoms;
- R.sup.3 is ##STR26## or ##STR27## Q is a group of the formula ##STR28## where R.sup.1, R.sup.2, R.sup.3, A and n are as defined above;
- k is zero or 1;
- and
- R is a group of the formula ##STR29## where R.sup.6 is as defined above, and where the ##STR30## group is connected to R.sup.3.
10 more elements
Dependencies are inferred from the claim text.