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US 4,378,277 AGranted
Photopolymerizable epoxy-containing compositions
AssigneeMinnesota Mining and Manufacturing Company
InventorGeorge H. Smith
Life of this patent
Estimating the term…
Abstract
Photopolymerizable epoxy compositions which comprise an epoxy-containing material and photosensitive aromatic iondonium salt of a halogen-containing complex ion are described as are coated substrates and methods for bonding materials together using such compositions.
Claims18
A photopolymerizable composition comprising:
- (a) an organic compound having an epoxy functionality of at least 1;
- (b) about 0.5 to 30 parts by weight, per 100 parts by weight of said organic compound, of an aromatic iodonium complex salt photoinitiator of the formula ##STR5## wherein Ar.sup.1 and Ar.sup.2 are aromatic groups having 4 to 20 carbon atoms and are selected from the group consisting of phenyl, thienyl, and furanyl groups;
- Z is an oxygen atom, a carbon-to-carbon bond, or ##STR6## where R.sub.1 and R.sub.2 are selected from the group consisting of hydrogen, an alkyl radical having 1 to 4 carbon atoms, and an alkenyl radical having 2 to 4 carbon atoms, and n is zero or 1;
- and X.sup.- is a halogen-containing complex anion selected from the group consisting of tetrafluoroborate, hexafluorophosphate, hexafluoroarsenate, hexachloroantimonate, and hexafluoroantimonate;
- and
- (c) about 0.01 to 1 part by weight of sensitizing dye per part by weight of photoinitiator.
3 more elements
A photopolymerizable composition comprising an admixture of:
- (a) 80 to 100 parts by weight of a diglycidyl ether of Bisphenol A,
- (b) up to 20 parts by weight of a phenyl glycidyl ether,
- (c) up to 10 parts by weight of a solvent carrier,
- (d) 0.5 to 20 parts by weight of an aromatic iodonium complex salt photoinitiator of the formula ##STR8## wherein Ar.sup.1 and Ar.sup.2 are aromatic groups having 4 to 20 carbon atoms and are selected from the group consisting of phenyl, thienyl, and furanyl groups;
- Z is an oxygen atom, a carbon-to-carbon bond, or ##STR9## where R.sub.1 and R.sub.2 are selected from the group consisting of hydrogen, an alkyl radical having 1 to 4 carbon atoms and an alkenyl radical having 2 to 4 carbon atoms;
- n is zero or 1;
- and X.sup.- is a halogen-containing complex anion selected from the group consisting of tetrafluoroborate, hexafluorophosphate, hexafluoroarsenate, hexachlorostannate and hexafluoroantimonate;
- and
- (e) 0.01 to about 1 part by weight of a sensitizing dye per part of said photoinitiator.
6 more elements
A visible light curable epoxy resin composition consisting essentially of by weight
- (a) an epoxy resin;
- (b) from 0.1% to 30% of (a) of a photoinitiator consisting essentially of an aryliodonium salt of the formula ##STR10## (c) from 0.005% to 30%, based on the weight of (a), of a cationic dye selected from the class consisting of Acridine orange, Benzoflavin and Setoflavin T;
- wherein Ar.sup.1 and Ar.sup.2 are aromatic groups having 4 to 20 carbon atoms and are selected from the group consisting of phenyl, thienyl, and furanyl groups;
- Z is an oxygen atom, a carbon-to-carbon bond, or ##STR11## where R.sub.1 and R.sub.2 are selected from the group consisting of hydrogen, an alkyl radical having 1 to 4 carbon atoms, and an alkenyl radical having 2 to 4 carbon atoms, and n is zero or 1;
- and X.sup.- is a halogen-containing complex anion selected from the group consisting of tetrafluoroborate, hexafluorophosphate, hexafluoroarsenate, hexachloroantimonate, and hexafluoroantimonate.
2 more elements
Dependencies are inferred from the claim text.