Coating composition for release sheets
AssigneeScott Paper Company
InventorsJohn A. Mattor, Lawrence Price
Life of this patent
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Abstract
Disclosed is a release sheet having on at least one of its outer surfaces a dried and cured coating composition comprising a release agent, a cross-linkable thermoplastic resin, and a water dispersible organic compound containing polyoxyethylene, polyoxypropylene, or a block copolymer of polyoxyethylene and polyoxypropylene.
Claims12
A coating composition comprising, by dry weight per 100 parts of coating, from about 3 to about 30 parts by dry weight of a release agent, from about 20 parts to about 60 parts by dry weight of a cross-linkable thermosetting resin selected from urea-formaldehyde resin condensates, melamine-formaldehyde resin condensates, or phenolic resins, and from about 4 parts to about 30 parts by dry weight of a water dispersible organic compound containing polyoxyethylene, polyoxypropylene, or a block copolymer of polyoxyethylene and polyoxypropylene.
In a method of consolidating a plurality of laminae impregnated with thermosetting resin by simultaneously heating and pressing the laminae, the improvement wherein at least one of the outer laminae is pressed against a release surface of a dried and cured coating composition comprising, in effective amounts for release, a release agent, a crosslinkable thermosetting resin, and a water dispersible organic compound containing polyoxyethylene, polyoxypropylene, or a block copolymer of polyoxyethylene and polyoxypropylene.
In a method of forming a film of resinous material which includes the steps of coating the film of resinous material in a flowable state onto a release surface, drying the resinous film material, and stripping it from the release surface, the improvement wherein the release surface is provided by a dried and cured coating composition comprising, in effective amounts for release, a release agent, a crosslinkable thermosetting resin selected from urea-formaldehyde resin condensates, melamine formaldehyde resin condensates, or phenolic resins, and a water dispersible organic compound containing polyoxyethylene, ployoxypropylene, or a block copolymer of polyoxyethylene and polyoxypropylene.
Dependencies are inferred from the claim text.