Photo-curable epoxy resin composition with organic aluminum and α-ketosilyl compounds

Claim 2

A photo-curable epoxy resin composition comprising: an epoxy resin; and a catalytic component comprising: an organic aluminum compound, and an alpha-ketosilyl compound, whereby the composition is curable upon exposure to light to produce a cured product free from ionic impurities.

Claim 3

A photo-curable epoxy resin composition as defined in claim 1, wherein said organic aluminum compound is selected from the group consisting of alkoxyaluminum, aryloxyaluminum, acyloxyaluminum, and aluminum chelate compounds.

Claim 4

A photo-curable epoxy resin composition as defined in claim 1, wherein said aluminum compound is used in an amount of 0.001 to 10% by weight based on the epoxy resin.

Claim 5

A photo-curable epoxy resin composition as defined in claim 3, wherein said aluminum compound is used in an amount of 0.5 to 5% by weight based on the epoxy resin.

Claim 6

A photo-curable epoxy resin composition as defined in claim 1, wherein said α-ketosilyl compound has the following general formula: ##STR7## in which R 1 and R 2 each represent a substituted or unsubstituted alkyl group having from 1 to 10 carbon atoms, or a substituted or unsubstituted aromatic group, and n represents an integer from 0 to 3, provided that a plurality of R 1 may be the same as or different from one another when n is 2 or 3, and a plurality of R 2 may be the same as or different from one another when n is 0, 1 or 2.

Claim 7

A photo-curable epoxy resin composition as defined in claim 1, wherein said α-ketosilyl compound is used in an amount of 0.1 to 10% by weight based on the epoxy resin.

Claim 8

A photo-curable epoxy resin composition as defined in claim 6, wherein said α-ketosilyl compound is used in an amount of 1 to 5% by weight based on the epoxy resin.

Claim 9

A photo-curable epoxy resin composition as defined in any of claim 1, wherein said composition further contains an active proton-containing compound.

Claim 10

A photo-curable epoxy resin composition as defined in claim 8, wherein said active proton-containing compound is water, an alcohol or a thiol.

Claim 11

A photo-curable epoxy resin composition as defined in claim 8, wherein said active proton-containing compound is used in an amount of 0.01 to 10% by weight based on the epoxy resin.

Claim 12

A photo-curable epoxy resin composition as defined in claim 10, wherein said active proton-containing compound is used in an amount of 1 to 7% by weight based on the epoxy resin.

Claim 13

A photo-cured epoxy resin composition, comprising a photo-curable epoxy resin composition as defined by claim 1, which has been exposed to light for a period of time sufficient to cure said composition.

Claim 14

An article of manufacture suitable for use in electrical applications, comprising a base member and a layer of an electrically-insulating composition applied to said base member, wherein said insulating composition comprises a photo-cured epoxy resin composition as defined in claim 12.