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US 4,182,831 AGranted
Cationic epoxide resinous composition
AssigneeCelanese Polymer Specialties Company
InventorDarrel D. Hicks
Life of this patent
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Abstract
Polyepoxide resins are reacted with a molar excess of a primary amine to form an amine terminated resin, the amine groups of which are then reacted with a monoepoxide. The primary amine is a mixture of an aliphatic monoamine and an aliphatic diamine which contains one primary amine group and one tertiary amine group. The resinous reaction products can be salted with an acid and can be dissolved or dispersed in water. The aqueous dispersions or solutions can then be formulated into primer coatings for metal objects.
Claims11
A soluble and fusible resinous composition comprising the reaction product of
- (A) a polyepoxide resin derived from a dihydric phenol or a dihydric alcohol and an epihalohydrin, said polyepoxide resin having a 1,2-epoxide equivalent weight of about 180 to about 650;
- (B) an amine mixture of
- (1) an aliphatic monoamine containing about 8 to about 18 carbon atoms, one primary amine group and no other groups reactive with epoxy groups, and
- (2) an aliphatic diamine containing one primary amine group and one tertiary amine group and no other groups reactive with epoxide groups wherein the molar ratio of (1) and (2) in the mixture varies from about 2:1 to about 1:3, and
- (C) a monoepoxide which contains one 1,2-epoxide group and no other groups reactive with amine groups, said monoepoxide having about 8 to 24 carbon atoms
- wherein A, B and C are reacted in the mol ratio of 5:6:2 to 2:3:2, and wherein A and C are added to B at a reaction temperature of about 50.degree. C. to about 150.degree. C. at an addition rate which does not substantially exceed the epoxy-amine reaction rate.
3 more elements
Dependencies are inferred from the claim text.