Hardener for epoxy resin, epoxy resin composition, and process for producing silane-modified phenolic resin
AssigneeArakawa Chemical Industries, Ltd.
InventorsHideki Goda, Shoji Takeda
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Abstract
The present invention provides a curing agent for epoxy resin containing a siloxane-modified phenol resin (3) obtained by dealcoholization condensation reaction between a phenol resin (1) and a hydrolyzable alkoxysilane (2). The present invention further provides an epoxy resin composition comprising an epoxy resin and the above-mentioned curing agent for epoxy resin. The present invention further provides a method for preparing a siloxane-modified phenol resin (3) characterized by subjecting a phenol resin (1) and a hydrolyzable alkoxysilane (2) to dealcoholization condensation reaction.
Claims13
A curing agent for epoxy resin, the curing agent containing a siloxane-modified phenol resin (3) which is obtained by dealcoholization condensation reaction between a phenol resin (1) and hydrolyzable alkoxysilane (2), wherein the hydrolyzable alkoxysilane (2) is a partial condensate of a compound represented by the formula R1n Si(OR2)4−n, wherein n is 0 or 1, R1 is a lower alkyl group, and R2 is a lower alkyl group which may be the same or different.
A method for preparing a siloxane-modified phenol resin (3) comprising subjecting a phenol resin (1) and hydrolyzable alkoxysilane (2) to dealcoholization reaction, wherein the hydrolyzable alkoxysilane (2) is a partial condensate of a compound represented by the formula R1nSi(OR2)4−n, wherein n is 0 or 1, R1 is a lower alkyl group, and R2 is a lower alkyl group which may be the same or different.
Dependencies are inferred from the claim text.