Coating compositions and polyanhydrides for use therein

Details Coating compositions and polyanhydrides for use therein Coating compositions and polyanhydrides for use therein

1992-04-03

1993-06-08

Schofer, Joseph L.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Mixing of two or more solid polymers; mixing of solid...

525183, 525207, 5253274, 525382, 525384, C08F 832

Patent

active

052180557

ABSTRACT:
A novel polyanhydride having at least two cyclic carboxylic acid anhydride groups per molecule also contains pendent amine groups, the proportion of amine groups to cyclic carboxylic acid anhydride groups being no more than 4:1 and the content of free carboxylic acid groups, if any are present, being less than 200 mole percent based on the amine groups, A coating composition comprises (A) a hydroxy component having at least two free hydroxy groups per molecule and (B) an anhydride component having at least two cyclic carboxylic acid anhydride groups per molecule, at least one of (A) and (B) being a film-forming polymer. The anhydride component (B) contains a catalytically effective amount of pendent amine groups for accelerating the curing reaction between the hydroxy groups of (A) and the anhydride groups of (B) and is preferably one of the novel polyanhydrides.

REFERENCES:
patent: 3329658 (1967-07-01), Fields
patent: 3449250 (1964-06-01), Fields
patent: 3529993 (1970-09-01), Cummings
patent: 3984382 (1976-10-01), Parekh et al.
patent: 4452948 (1984-06-01), Marrion
patent: 4596863 (1986-06-01), Sackmann
patent: 4634736 (1987-01-01), Ooka
patent: 4670516 (1987-06-01), Sackmann
patent: 4670521 (1987-06-01), Ooka
International search report, mailed Dec. 6, 1989.

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