Method of coating utilizing rheologically modified metal decorat

Details Method of coating utilizing rheologically modified metal decorat Method of coating utilizing rheologically modified metal decorat

1977-02-25

1978-08-15

Hayes, Lorenzo B.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

72 46, 260 294UA, 260 39R, 260 4221, 260851, 260855, 260856, 427388B, 428460, 428461, B21D 5126

Patent

active

041064216

ABSTRACT:
Disclosed are aqueous acrylic thermosetting resinous compositions having an alkaline pH and containing a specific rheological modifier in critical amount, and application to metal sheets, curing the same, and in a preferred embodiment shaping the metals to achieve metal decoration. By "decorating" is meant applying synthetic resinous coatings to the metal followed by a mechanical forming operation such as the formation of can bodies or screw-threaded bottle caps. The compositon is thermosettable and comprises (A) a water-insoluble addition copolymer of certain monomers in latex form, (B) a water-soluble urea-formaldehyde or triazine-formaldehyde reaction product or a water-soluble methanol or ethanol ether thereof, or a combination of the aminoplast products, and, as an essential component, (C) a water-soluble polyethylene glycol having an average molecular weight of from about 400 to about 100,000. The copolymer contains small amounts of carboxyl groups, and amide or hydroxyl functionality, or both of the latter. The weight ratio on a solids basis of (A) to (B) is from 35:65 to 65:35, and the solids content is between 40 and 80 percent, the amount of said water-soluble rheology modifier being from 1 to 5 percent based on the total weight of (A) and (B), on a solids basis.

REFERENCES:
patent: 3352806 (1967-11-01), Hicks
patent: 3836494 (1974-09-01), Hekal et al.

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