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US 6,132,883 AGranted
Transparent powder coating compositions for protecting surfaces
Assignee3M Innovative Properties Company
InventorsJoseph M. McGrath, Suman K. Patel
Life of this patent
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Abstract
Powder coating compositions are described containing a blend of ionomers and polyethylene copolymers which fuse at temperatures of about 150.degree. C. or below and are durable, weatherable, solvent-resistant, and thereby provide transparent protective coatings on substrates such as signs, particularly traffic signs and license plates.
Claims9
A powder coating composition comprising a compatible blend, having a particle size from about 5 to about 200 micrometers, of:
- (a) about 50 to about 85 parts by weight, based on total polymer content, of an ionomer resin;
- and
- (b) about 15 to about 50 parts by weight of a low molecular weight copolymer of ethylene and acrylic or methacrylic acid;
- wherein said composition is capable of being transparent after fusing at a temperature of about 150.degree. C. or below.
1 more element
Dependencies are inferred from the claim text.