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US 5,684,066 AGranted
Protective coatings having enhanced properties
AssigneeH.B. Fuller Licensing & Financing, Inc.
InventorsWayne G. Eklund, Stephen C. Hart
Life of this patent
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Abstract
The present invention discloses a method for the preparation of heat-resistant protective coatings wherein powder-based compositions are cured at temperatures greater than about 205.degree. C. to form high-film-build coatings which are substantially free of coating defects.
Claims16
A protective coating formed from a powder-based composition comprising:
- a) at least one glycidyl-functional polyacrylic polymer;
- b) at least one hydroxyl-functional polysiloxane;
- c) at least one inorganic compound selected from the group consisting of calcium metasilicate, hydrated silicates of aluminum and mixtures thereof;
- and
- d) at least one flow-control agent.
2 more elements
An article comprising a substrate coated with a protective coating, on at least one surface of the substrate, comprising the reaction product of:
- a) at least one glycidyl-functional polyacrylic polymer;
- b) at least one hydroxyl-functional polysiloxane;
- c) at least one inorganic compound selected from the group consisting of calcium metasilicate, hydrated silicates of aluminum and mixtures thereof;
- and
- d) at least one flow-control agent.
2 more elements
A method for the preparation of a protective coating comprising the steps of:
- a) providing a dry blend of powder-based material comprising;
- i) at least one glycidyl-functional polyacrylic polymer;
- ii) at least one hydroxyl-functional polysiloxane;
- iii) at least one inorganic compound selected from the group consisting of calcium metasilicate, hydrated silicates of aluminum and mixtures thereof;
- and
- iv) at least one flow-control agent;
- b) melt mixing said blend and cooling to form a solid particulate;
- c) grinding said particulate to form a powder-based composition having an average particle size of less than about 150 microns;
- and
- d) coating said composition onto a substrate and heating to a temperature greater than about 205.degree. C.
7 more elements
Dependencies are inferred from the claim text.