Aqueous dispersions for the preparation of crosslinkable coating

Details Aqueous dispersions for the preparation of crosslinkable coating Aqueous dispersions for the preparation of crosslinkable coating

1989-09-19

1991-04-16

Lusignan, Michael

Stock material or miscellaneous articles

Composite

Of metal

427379, 427386, 4273882, 4273883, 4273884, 428500, 524509, 524548, 524811, B32B 1508, B32B 2700

Patent

active

050081551

ABSTRACT:
Aqueous dispersion for the production of crosslinkable surface coatings, containing, as the binder, a crosslinkable dispersion copolymer formed from olefinically unsaturated monomers and, if appropriate, further customary formulation constituents of lacquers, the dispersed particles of copolymer having average particle diameters from 0.5 to 10 .mu.m and the proportion in the dispersion copolymer of comonomer units carrying crosslinkable groups being greater than 10% by weight, relative to the dispersion copolymer.
The preparation of the dispersion by emulsion or suspension copolymerization, in particular with the addition of free radical chain transfer substances, and also the use of the dispersion as a constituent of baking lacquers, hydrofillers, metallic paints and EPC paints.
Also a process for the bake-coating of surfaces of solid substrates using the abovementioned aqueous dispersion, wherein the required amount of dispersion is applied to the surface to be coated and is dried at a temperature below its minimum film-forming temperature, and the dried coating is crosslinked by baking at a temperature above the glass transition temperature.

REFERENCES:
patent: 3904795 (1975-09-01), Mercurio
patent: 4264656 (1981-04-01), Reeder
patent: 4351755 (1982-09-01), Brixius et al.
patent: 4431689 (1984-02-01), Gunter
patent: 4522972 (1985-06-01), Mondt et al.

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