Process for making wrinkle-free coating using solventborne clear

Details Process for making wrinkle-free coating using solventborne clear Process for making wrinkle-free coating using solventborne clear

1992-05-08

1994-02-01

Pal, Asok

Coating processes

Applying superposed diverse coating or coating a coated base

Synthetic resin coating

427409, 4274121, B05D 136

Patent

active

052830845

ABSTRACT:
The presence of an acid catalyst in a clearcoat composition enables the production of a wrinkle-free coating in a process comprising the simultaneous curing of applied layers of both a waterborne basecoat composition as well as a solventborne clearcoat composition. The waterborne basecoat composition comprises an organic resin, a crosslinker, and a free amine. The solventborne clearcoat composition comprises an acid catalyst in an amount significantly higher than the quantity normally used in high solids original equipment manufacturer clearcoat compositions, a polymer which is crosslinkable with melamine, and a monomeric melamine type crosslinking resin for crosslinking the polymer. The process is most preferably used to make an automotive quality topcoat.

REFERENCES:
patent: 3953643 (1976-04-01), Cheung et al.
patent: 4403003 (1983-09-01), Backhouse
patent: 4971841 (1990-11-01), Panush et al.
patent: 5102692 (1992-04-01), Tanigami et al.

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