Decorative epoxy resin aggregate binder formulation
AssigneeTexaco Inc.
InventorKathy B. Sellstrom
Life of this patent
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Abstract
A non-yellowing decorative epoxy resin aggregate binder formulation is disclosed. The formulation comprises 100 parts by weight polyepoxide, 25 parts by weight of a specified polyoxypropylene diamine, 26 parts by weight nonylphenol and 4 parts by weight N-aminoethylpiperazine and 1 to 3 parts by weight of a specified substituted benzotriazole UV absorber dissolved in xylene. Nonylphenol gives the formulation strength with flexibility and resistance to weathering with a high gloss appearance. The substituted benzotriazole UV absorber prevents yellowing of the clear coating. The formulation is useful as a clear coating to bind aggregate (colored pebbles) to a cement surface to form a decorative coating. The formulation is distinguished by its clear, non-yellowing appearance.
Claims11
An epoxy resin composition comprising
- (a) a vicinal polyepoxide having an average of at least 1.8 reactive 1,2-epoxy groups per molecule;
- and
- (b) a stoichiometric amount of a curing agent comprising:
- (i) 20 to 30 parts by weight of a first diamine of the general formula:
- H.sub.2 NCH(CH.sub.3)CH.sub.2 [OCH.sub.2 CH(CH.sub.3)].sub.x NH.sub.2
- wherein x averages from 1 to 6;
- (ii) 20 to 30 parts by weight of nonylphenol;
- and
- (iii) 1 to 8 parts by weight of N-aminoethylpiperazine, and
- (iv) 0.8 to 5 parts by weight of a substituted benzotriazole UV absorber of the formula:
- ##STR13##
A decorative aggregate binder formulation comprising:
- (1) aggregate;
- (2) an epoxy resin composition in an amount to coat the aggregate, the epoxy resin composition comprising:
- (a) a vicinal polyepoxide having an average of at least 1.8 reactive 1,2-epoxy groups per molecule, and
- (b) a stoichiometric amount of a curing agent comprising:
- (i) 20 to 30 parts by weight of a first diamine of the formula:
- H.sub.2 NCH(CH.sub.3)CH.sub.2 [OCH.sub.2 CH(CH.sub.3)].sub.x NH.sub.2
- wherein x averages from 1 to 6;
- (ii) 20 to 30 parts by weight of nonylphenol;
- and
- (iii) 1 to 8 parts by weight of N-aminoethylpiperazine;
- and
- (iv) 0.8 to 5 parts by weight of a substituted benzotriazole UV absorber of the formula:
- ##STR14##
Dependencies are inferred from the claim text.