Epoxy-functional fluorosilicones
AssigneeGeneral Electric Company
InventorsRichard P. Eckberg, Edwin R. Evans
Life of this patent
Estimating the term…
Abstract
Novel epoxy-functional fluorosilicones and UV-curable compositions containing these epoxy-functional fluorosilicones in combination with onium salt photoinitiators are provided, the UV-curable compositions having improved cure efficiency and improved solvent and fuel resistance as compared to epoxy-functional silicones containing only non-fluorinated organic groups. Such compositions are useful as conformal coatings, optical fiber coatings, and electrical encapsulation.
Claims31
An epoxy-functional fluorosilicone selected from the group consisting of resinous epoxy-functional fluorosilicones having the general formula (III) ##STR29## and resinous epoxy-functional fluorosilicones having the general formula (IV) ##STR30## wherein E represents an epoxy-functional organic group of from about 2 to about 20 carbon atoms, R represents an alkyl radical having from 1 to about 10 carbon atoms, R.sup.1 represents a perfluoroalkyl radical having from about 1 to about 8 carbon atoms, R.sup.2 represents an alkyl radical having from 1 to about 10 carbon atoms, "c" represents a number from 1 to about 100, and "d" represents a number from 1 to about 100.
An ultraviolet radiation-curable epoxy-functional fluorosilicone composition comprising:
- (1) an epoxy-functional fluorosilicone selected from the group consisting of:
- (A) linear epoxy-functional fluorosilicones having the general formula (I) ##STR32## (B) epoxy-functional fluorosilicones having the general formula (II) ##STR33## (C) resinous epoxy-functional fluorosilicones having the general formula (III) ##STR34## and (D) resinous epoxy-functional fluorosilicones having the general formula (IV) ##STR35## wherein E represents an epoxy-functional organic group of from about 2 to about 20 carbon atoms, R represents an alkyl radical having from 1 to about 10 carbon atoms, R.sup.1 represents a perfluoroalkyl radical having from about 1 to about 8 carbon atoms, R.sup.2 represents a an alkyl radical having from 1 to about 10 carbon atoms, "a" represents a number from 1 to about 100, "b" represents a number from 1 to about 100, "c" represents a number from 1 to about 100, and "d" represents a number from 1 to about 100;
- and
- (2) a catalytic amount of an onium salt photocatalyst or a combination of onium salt photocatalysts.
Dependencies are inferred from the claim text.