Method for treating a substrate with a radiation and chemically

Details Method for treating a substrate with a radiation and chemically Method for treating a substrate with a radiation and chemically

1978-07-10

1980-07-15

Newsome, John H.

Coating processes

Electrical product produced

Welding electrode

20415915, 260 18TN, 528 73, 560 26, 560158, 427 541, 4273722, B05D 306

Patent

active

042129010

ABSTRACT:
A method is provided for treating a substrate with a radiation curable coating composition based on a polyester resin esterified with acrylic acid or methacrylic acid and having a hydroxyl number in the range of from 50 to 250 and an ethylenic unsaturation equivalent weight of from 200 to 10,000 grams and on a polyisocyanate that is present in an amount of 0.7 to 1.3 equivalents of isocyanate per equivalent of hydroxyl contained in the composition. The curing of the coating composition is effected in a first stage by subjecting the composition to radiation having a wave length of 200 to 600 nm and in a second stage by reaction between the isocyanate groups of the polyisocyanate and the hydroxyl groups of the polyester resin.

REFERENCES:
patent: 3935330 (1976-01-01), Smith et al.
patent: 4013806 (1977-03-01), Volkert et al.
patent: 4025407 (1977-05-01), Chang et al.

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