Coating composition and method for producing precoated steel she

Details Coating composition and method for producing precoated steel she Coating composition and method for producing precoated steel she

1998-08-24

2000-01-25

Gorr, Rachel

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

Synthetic resins

From reactant having at least one -n=c=x group as well as...

528 45, 528 73, 528289, 525124, 525131, 525178, 427409, 4284258, C08G 1842

Patent

active

060180137

ABSTRACT:
This invention relates to a coating composition for precoated steel sheets which are required to have high hardness, high workability and high distinctness of image, and to a method for producing a precoated steel sheet having a coating film of the composition. The composition is prepared by adding a compound of any of the following (a) to (c) to a coating composition consisting essentially of a polyol and containing, as the curing agent, an isocyanate compound or an amino resin, and the coating film of the composition has both high-level workability and high-level hardness.
(a) Polyester compounds comprising main repeating units of a general formula (1): ##STR1## wherein n is an integer; and R is an alkylene group having 10 or less carbon atoms, or a 1,4-cyclohexylene-dimethylene group, or a neopentylene group, or a polyoxyalkylene group.
(b) Polyester compounds comprising main repeating units of a general formula (2): ##STR2## wherein n is an integer of 10 or less; and R is an alkylene group having 10 or less carbon atoms, or a 1,4-cyclohexylene-dimethylene group, or a neopentylene group.
(c) Compounds having the structure of a general formula (3):

REFERENCES:
patent: 4352924 (1982-10-01), Wooten et al.
patent: 4859760 (1989-08-01), Light et al.
patent: 5326820 (1994-07-01), Hoffmann et al.
patent: 5418309 (1995-05-01), Tanabe et al.
patent: 5543475 (1996-08-01), Jones et al.

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