Coating composition comprising a hydroxy component, an anhydride

Details Coating composition comprising a hydroxy component, an anhydride Coating composition comprising a hydroxy component, an anhydride

1981-09-01

1984-06-05

Page, Thurman K.

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

Synthetic resins

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

4273855, 427386, 4273882, 525223, C08F 2008

Patent

active

044529481

ABSTRACT:
A coating composition comprises a hydroxy component having at least two free hydroxyl groups per molecule and an anhydride component which is a polymer-containing cyclic carboxylic acid anhydride groups derived from an olefinically unsaturated cyclic carboxylic acid anhydride, the two components being packaged separately during storage of the composition and being compatible on mixing. At least one of the components is a film-forming polymer. The composition includes a catalytically effective amount of amine groups for accelerating the curing reaction between the hydroxyl groups and the anhydride groups. The amine groups are present in the molecule of the hydroxy component or in a separate amine compound. The hydroxy component is preferably a film-forming acrylic copolymer having pendent hydroxyl and dialkyl-amino-alkyl groups. The composition is particularly useful as a glossy pigmented coating for rigid substrates such as vehicle bodies where hardening of the coating at ambient temperature is required.

REFERENCES:
patent: 3972961 (1976-08-01), Hammer et al.
patent: 4069275 (1978-01-01), Labana et al.
patent: 4101606 (1978-07-01), Cenci et al.
patent: 4145513 (1979-03-01), Dalibor
patent: 4163739 (1979-08-01), Dalibor
patent: 4177183 (1979-12-01), Dalibor
patent: 4308188 (1981-12-01), Wicks et al.

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