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US 4,077,927 AGranted
Cured epoxy polymer having improved adhesive properties
AssigneeWestern Electric Company, Inc.
InventorCharles Allen McPherson
Life of this patent
Estimating the term…
Abstract
A cured epoxy polymer having improved adhesive properties is disclosed. The epoxy polymer is the reaction product of a mixture comprising a resin component comprising (a) a diglycidyl ether based upon linoleic dimer acid, (b) an elastomerically modified epoxy resin blend and (c) a diglycidyl ether of bisphenol A and/or bisphenol F and a suitable curing agent. The reaction mixture is heated at a suitable temperature for a period of time sufficient to attain a full cure of the epoxy.
Claims12
A cured epoxy polymer having improved adhesive properties comprising the reaction product of a mixture comprising:
- (1) a resin component comprising,
- (a) about 25 to about 95 parts by weight per 100 parts by weight of said resin component of a diglycidyl ether based upon linoleic dimer acid selected from the group consisting of (a.sup.1) an adduct of two moles of the diglycidyl ether of bisphenol A and one mole of linoleic dimer acid having a structural formula of ##STR31## and an epoxide equivalent weight of 650 to 750, (b.sup.1) a diglycidyl ether of linoleic dimer acid having a structural formula of ##STR32## and an epoxide equivalent weight of 400 to 420, and (c.sup.1) a mixture thereof,
- (b) about 5 to about 50 parts by weight per 100 parts by weight of the resin component of an elastomerically modified epoxy resin blend comprising the reaction product of about 40 weight percent of a carboxyl terminated acrylonitrile/butadiene random copolymer having a structural formula of ##STR33## containing 2.37 percent carboxyl groups, 18 to 19 percent bound acrylontrile and having a number average molecular weight of 3200, combined with about 60 weight percent of a diglycidyl ether selected from the group consisting of a diglycidyl ether of bisphenol A having an epoxide equivalent weight of 180 to 195 and a diglycidyl ether of bisphenol F having an epoxide equivalent weight of 152 to 167;
- and
- (c) a remainder of a suitable diglycidyl ether selected from the group consisting of a diglycidyl ether of bisphenol A, a diglycidyl ether of bisphenol F or a mixture thereof;
- and
- (2) a suitable curing agent selected from (a) an acid anhydride present in an amount ranging from about 16 to about 60 parts by weight per 100 parts by weight of the resin component, (b) a suitable polyamine present in an equal mole-to-mole ratio with the resin component, (c) a mixture comprising said polyamine in (b) above combined with at least 5 parts by weight per 100 parts by weight of the resin component of a suitable acid anhydride, (d) a mixture comprising said acid anhydride in (a) above combined with up to about 30 parts by weight per 100 parts by weight of the resin component of a carboxylic acid selected from the group consisting of dicarboxylic acid having a structural formula of ##STR34## where R" is an organic radical selected from ##STR35## a trimer acid having a stoichiometry of C.sub.54 H.sub.96 O.sub.6, and a mixture thereof, and (e) a mixture of the foregoing.
4 more elements
A curable epoxy composition comprising a mixture which comprises:
- (1) a resin component comprising:
- (a) about 25 to about 95 parts by weight per 100 parts by weight of said resin component of a diglycidyl ether based upon linoleic dimer acid selected from the group consisting of (a.sup.1) an adduct of two moles of the diglycidyl ether of bisphenol A and one mole of linoleic dimer acid having a structural formula of ##STR36## and an epoxide equivalent weight of 650 to 750, (b.sup.1) a diglycidyl ether of linoleic dimer acid having a structural formula of ##STR37## and an epoxide equivalent weight of 400 to 420, and (c.sup.1) a mixture thereof,
- (b) about 5 to about 50 parts by weight per 100 parts by weight of the resin component of an elastomerically modified epoxy resin blend comprising the reaction product of about 40 weight percent of a carboxyl terminated acrylonitrile/butadiene random copolymer having a structural formula of ##STR38## containing 2.37 percent carboxyl groups, 18 to 19 percent bound acrylonitrile and having a number average molecular weight of 3200, combined with about 60 weight percent of a diglycidyl ether selected from the group consisting of a diglycidyl ether of bisphenol A having an epoxide equivalent weight of 180 to 195 and a diglycidyl ether of bisphenol F having an epoxide equivalent weight of 152 to 167;
- and
- (c) a remainder of a suitable diglycidyl ether selected from the group consisting of a diglycidyl ether of bisphenol A, a diglycidyl ether of bispenol F or a mixture thereof;
- and
- (2) a suitable curing agent selected from (a) an acid anhydride present in an amount ranging from about 16 to about 60 parts by weight per 100 parts by weight of the resin component, (b) a suitable polyamine present in an equal mole-to-mole ratio with the resin component, (c) a mixture comprising said polyamine in (b) above combined with at least 5 parts by weight per 100 parts by weight of the resin component of a suitable acid anhydride, (d) a mixture comprising said acid anhydride in (a) above combined with up to about 30 parts by weight per 100 parts by weight of the resin component of a carboxylic acid selected from the group consisting of a dicarboxylic acid having a structural formula of ##STR39## where R" is an radical selected from ##STR40## a trimer acid having a stoichiometry of C.sub.54 H.sub.96 O.sub.6, and a mixture thereof, and (e) a mixture of the foregoing.
4 more elements
Dependencies are inferred from the claim text.