Stabilized phenolic resins
AssigneeThe Dow Chemical Company
InventorsC. Eugene Jinkins, Bobby Legler
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Abstract
The addition of a water-absorbent, finely divided powder to a phenolic resole resin provides a stabilized resin composition which cures in the presence of an acid catalyst at ambient temperatures to a relatively thick coating having a reduced number of defects, e.g., pinholes and blistering. For example, a resole resin composition containing a stabilizing amount of fumed silica can be blended with a mixture of benzene sulfonyl cloride and trichloroacetic acid, applied to a substrate and cured to form an essentially defect-free coating.
Claims8
A method of preparing a coating from a stabilized phenolic resole resin composition of a phenolic resole resin and an amount of a finely divided, water absorbent powder having a number average particle size of less than about 5,000 A sufficient to reduce the amount of a distinct, water rich phase formed in the phenolic resole resin;
- said method comprising the steps of:
- (a) adding a catalytic amount of an acid to the stabilized resole resin composition;
- (b) applying the catalyzed resole resin composition to a suitable substrate;
- and
- (c) subjecting the catalyzed resole resin composition to conditions sufficient to cure the resin on the substrate.
Dependencies are inferred from the claim text.