Aqueous inpress primer sealer for hardboard manufacturing
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United States of America Patent
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Oct 22, 1991
Grant Date -
N/A
app pub date -
Dec 26, 1989
filing date -
Dec 26, 1989
priority date (Note) -
Expired
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Abstract
An aqueous dispersed primer-sealer composition applied to a surface layer of overlay paper or surface mat provides an impregnated surface layer for use in manufacturing hardboard products by hot pressing in a molding operation. The primer sealer provides a finished surface as well as defect-free surface from the molding surface. The primer-sealer can be pigmented and is based on a polymeric binder composition containing melamine resin, carboxyl functional acrylic emulsion copolymer, vinyl-acetate-vinyl versatate copolymer, emulsified fatty acid, and polyvinyl alcohol.
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