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US 4,118,541 AGranted
Release sheet of a coated cellulose paper
AssigneeFormica Corporation
InventorsGeorge Edward Power, Donald Louis Bolling
Life of this patent
Estimating the term…
Abstract
A release sheet useful in the production of heat and pressure consolidated laminates comprising a paper sheet having coated thereon a first coating comprising (A) an oil-modified alkyd resin crosslinked with a polyalkylether of a polymethylol melamine and a second coating, atop said (A), comprising (B) a copolymer of an unsaturated acid, ester or anhydride and a vinyl ether or an unsaturated alkyl compound.
Claims13
A release sheet for use in the production of laminates comprising
- (1) a cellulosic paper sheet coated with a first coating comprising
- (A) an oil-modified alkyd resin cross-linked with from about 30 to about 70%, by weight, based on the total weight of (A), of a polyalkylether of a polymethylol melamine and a second coating, atop said (A), comprising
- (B) a copolymer containing from about 15 to about 85 mole percent of recurring units having the formula ##STR3## wherein each R is, individually, OR.sup.1, R.sup.1 being hydrogen or C.sub.1 -C.sub.22 alkyl, or the two R groups taken together form an oxa group, and the remaining units are recurring units of the formula ##STR4## wherein R.sup.2 is hydrogen or methyl, R.sup.3 is a C.sub.9 -C.sub.30 alkyl radical and X is O or CH.sub.2.
Dependencies are inferred from the claim text.