UV curable crosslinking agents useful in copolymerization
First Claim
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1. A crosslinking composition having at least two different types of ethylenically polymerizable groups said crosslinking composition able to enhance the copolymerization of comonomers having differing rates of reactivity and wherein said composition is present in copolymeric systems in concentrations of from about 0.001 to about 10 weight percent and having the schematic representation:
- ##STR16## wherein V denotes a vinyl-containing group having the formula;
##STR17## A'"'"' denotes an acrylic-containing group having the formula;
##STR18## S denotes a styrene-containing group having the formula;
##STR19## wherein R1'"'"' is an alkyl radical derived from substituted and unsubstituted hydrocarbons, polyalkylene oxide, poly(perfluoro) alkylene oxide, dialkyl-capped polydimethylsiloxane, dialkyl-capped polydimethylsiloxane modified with fluoroalkyl or fluoroether groups;
R2'"'"' -R10'"'"' are independently H, or alkyl of 1 to 5 carbon atoms;
Q is an organic group containing aromatic moieties having 6-30 carbon atoms;
X, Y, and Z are independently O, NH or S;
v'"'"' is 1, or higher; and
a'"'"', s'"'"' are independently greater than or equal to 0, and a'"'"'+s'"'"' are greater than or equal to 1.
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Abstract
A novel class of compounds are disclosed which may be used as novel crosslinking agents for acrylic-containing, vinyl-containing and/or styrene-containing hydrophilic monomers to prepare novel UV-curable hydrophilic copolymers suitable for use as biomedical articles, especially contact lenses.
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Citations
36 Claims
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1. A crosslinking composition having at least two different types of ethylenically polymerizable groups said crosslinking composition able to enhance the copolymerization of comonomers having differing rates of reactivity and wherein said composition is present in copolymeric systems in concentrations of from about 0.001 to about 10 weight percent and having the schematic representation:
- ##STR16## wherein V denotes a vinyl-containing group having the formula;
##STR17## A'"'"' denotes an acrylic-containing group having the formula;
##STR18## S denotes a styrene-containing group having the formula;
##STR19## wherein R1'"'"' is an alkyl radical derived from substituted and unsubstituted hydrocarbons, polyalkylene oxide, poly(perfluoro) alkylene oxide, dialkyl-capped polydimethylsiloxane, dialkyl-capped polydimethylsiloxane modified with fluoroalkyl or fluoroether groups;R2'"'"' -R10'"'"' are independently H, or alkyl of 1 to 5 carbon atoms; Q is an organic group containing aromatic moieties having 6-30 carbon atoms; X, Y, and Z are independently O, NH or S; v'"'"' is 1, or higher; and a'"'"', s'"'"' are independently greater than or equal to 0, and a'"'"'+s'"'"' are greater than or equal to 1. - 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, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36)
- ##STR16## wherein V denotes a vinyl-containing group having the formula;
Specification