Coating wood surface by vinyl-modified lignocellulosic particles
AssigneeThe Borden Chemical Company (Canada) Limited
InventorsShui-Tung Chiu, William Melvin Turko
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Abstract
Panels are provided with a glossy, tough coating by a method comprising the steps of applying on the panel surface a conventional resin adhesive; spreading thereon vinyl-modified lignocellulosic particles made by polymerization of vinyl monomers on substrate lignocellulosic particles; and subjecting the assembly to heat and pressure. Over a wide range of add-on ratio of vinyl polymer to lignocellulosic particles, coatings can be produced which have neither the solvent sensitivity of the polymer nor the water sensitivity of the cellulose. The novel, esthetically pleasing marbleized appearance is heightened by the use of dyed particles.
Claims9
A method for producing a coating on a lignocellulose based panel board, which comprises the steps of applying on the panel board surface a conventional resin adhesive;
- spreading thereon vinyl-modified lignocellulosic particles made by a free-radical donor initiated polymerization of ethylenically unsaturated monomers on substrate lignocellulosic particles to form a thermoplastic coating;
- and subjecting the coated panel board assembly to heat and pressure sufficient to soften and spread said thermoplastic coating and thereby form a thin, hard, integral surface coating in situ on said panel board.
Method for producing an improved and decorative surface on a panel board including the steps of:
- providing an already formed wood panel board;
- applying a resin adhesive to at least one major surface of said panel board;
- allowing the adhesive to partially dry;
- forming vinyl-modified lignocellulosic particles by a redox initiated polymerization of an aqueous slurry of lignocellulosic particles and vinyl monomer;
- filtering the vinyl-modified lignocellulosic particles and then drying to provide particles having from 3-7% moisture by weight of said particles;
- applying a thermoplastic coating of said vinyl-modified lignocellulosic particles over said resin adhesive;
- and
- pressing and heating the coated panel to form a thin, continuous film of coalesced vinyl-modified lignocellulosic particles on the surface of said panel board.
Dependencies are inferred from the claim text.