One package system cold-setting coating compositions
AssigneeMitsubishi Gas Chemical Company, Inc.
InventorsKeiun Ko, Naomitsu Takashina, Senzo Shimizu, Masuya Ikegami, Yoshinori Iwamoto
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Abstract
This invention relates to a one package system cold-setting type coating composition which comprises an acrylic copolymer having carboxyl groups in its molecule or an alkyd resin, an aluminum alkoxide complex and a keto-enol tautomeric compound, characterized by adding a specific nitrogen compound to the composition for preventing discoloration of a coated substance.
Claims7
A one-package system cold-setting coating composition which consists essentially of (i) an acrylic copolymer having carboxyl groups in its molecule or an alkyd resin as a resin component, (ii) an aluminum alkoxide complex, (iii) a keto-enol tautomeric compound and (iv) a solvent, and (v) from 0.01 to 10 percent by weight of at least one nitrogen compound based on the weight of the composition comprising (i), (ii), (iii) and (iv), said nitrogen compound being selected from the group consisting of
- a. a monoamine or a hydroxymonoamine having the formula ##STR14## wherein R.sub.1 is alkyl having from 1 to 12 carbon atoms, alkenyl having from 2 to 12 carbon atoms, cyclohexyl, benzyl or hydroxyalkyl having from 1 to 4 carbon atoms, and each of R.sub.2 and R.sub.3 is hydrogen or the same as R.sub.1 ;
- b. a polyamine having the formula ##STR15## wherein n is an integer of 1 - 6, m is an integer of 1 - 3 and each of R.sub.4, R.sub.5, R.sub.6 and R.sub.7 is hydrogen or alkyl having from 1 to 4 carbon atoms, and C.sub.n H.sub.2n is alkylene;
- c. an aromatic amino compound having the formula ##STR16## wherein each of R.sub.8 and R.sub.9 is hydrogen or alkyl having from 1 to 4 carbon atoms;
- d. a heterocyclic compound selected from the group consisting of 1,2,4-triazole, benzotriazole, imidazole and morpholine;
- and
- e. an amine selected from the group consisting of guanidine and hexamethylenetetramine.
Dependencies are inferred from the claim text.