Claims
- 1. A process of coating an article with a coating composition having a solids content of 25-80% by weight in an inert liquid carrier and comprised of
- (a) a binder comprised of
- (1) 60-90%, based on the weight of the binder, of a polysiloxane resin-forming precondensate which has one or more of the units ##STR9## wherein X is functional group which allows cross-linking at its site, and
- a, b, c, d and e are of a magnitude and in proportions which provide the resin with a degree of substitution, measured as the ratio of phenyl plus methyl groups to silicon atoms, of at least about 1.0, and a ratio of phenyl groups to silicon atoms of at least about 0.3,
- and which has a silanol content about 4%, based on the weight of the precondensate;
- (2) 1-40%, based on the weight of the binder, of an epoxy resin having the formula ##STR10## wherein n is an integer from 0-42, and
- R is an alkylene group of 1-4 carbon atoms;
- (b) 0.2-10%, based on the weight of the binder, of a silicone fluid which is dimethyl polysiloxane fluid having a viscosity of 50-5000 centistokes measured at 25.degree. C.;
- (c) 0.2-10%, based on the weight of the binder, of catalyst which is a metal salt; and
- (d) inert liquid carrier, wherein said coating composition is applied in an amount to give a dry coating thickness of 5-125 .mu.m, and the coated article is baked for about 5-45 minutes at temperatures in the range of about 175.degree.-232.degree. C.
- 2. The process of claim 1 wherein the dry coating thickness is 12.5-37.5 .mu.m.
- 3. The process of claim 1 wherein the baking is done at about 215.degree. C.
CROSS-REFERENCE TO RELATED APPLICATION
This is a division, of application Ser. No. 871,697, filed Jan. 23, 1978 now abandoned, and which is a continuation-in-part of copending application Ser. No. 664,232, filed Mar. 5, 1976 now abandoned, and assigned to the assignee of the present application.
US Referenced Citations (6)
Divisions (1)
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Number |
Date |
Country |
Parent |
871697 |
Jan 1978 |
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Continuation in Parts (1)
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Number |
Date |
Country |
Parent |
664232 |
Mar 1976 |
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