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US 4,361,452 AGranted
Method of adhering wallcovering using aqueous adhesive compositions
AssigneeAllied Colloids Limited
InventorsJohn B. Clarke, Peter Flesher
Life of this patent
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AssigneeAllied Colloids Limited
InventorsJohn B. Clarke, Peter Flesher
Estimating the term…
A liquid polymeric composition comprises a suspension in an organic liquid of particulate water insoluble but water swellable polymer, the particles being less than 10 microns in size. To reduce viscosity in water the swellable polymer may be a copolymer and/or a water soluble polymer may be included. A composition of polymer particles that are swellable and contain both soluble and insoluble polymer can be made by inverse emulsion polymerization. An aqueous adhesive, that may be made by mixing this composition with water, comprises water swollen particulate polymer that may be a copolymer and that may be used with a dissolved polymer in order to reduce the viscosity. Pregummed substrates, such as wallpaper, that can be rendered adhesive by contacting with water are obtained by applying the aqueous or non-aqueous composition to the substrate and drying it on the substrate. Wallcovering can be stuck to a surface using the aqueous adhesive.
In a method in which an aqueous adhesive composition and a wallcovering are applied to a surface and the wallcovering is thereby bonded to the surface, the improvement in which the aqueous adhesive composition consists essentially of, as its adhesive component, synthetic polymeric material present in an amount of from 1 to 10% consisting substantially only of water swollen, water insoluble particles of cross-linked synthetic polymer having a dry particle size of less than 10 microns and which remain as separate discrete particles, during use of said aqueous adhesive composition the polymeric material being such that a 3% dispersion of it in deionised water has a Brookfield viscosity at 20 rpm of at least about 10,000 cps.
In a method in which an aqueous adhesive composition and a wallcovering are applied to a surface and the wallcovering is thereby bonded to the surface, the improvement in which the aqueous adhesive composition consists essentially of, as its adhesive component, synthetic polymeric material present in an amount of from 1 to 10% consisting substantially only of water swollen, water insoluble particles of cross-linked synthetic polymer having a dry particle size of less than 10 microns and which remain as separate discrete particles, during use of said aqueous adhesive composition the polymeric material being such that a 3% dispersion of it in deionised water has a Brookfield viscosity at 20 rpm of from about 10,000 cps to about 80,000 cps.
Dependencies are inferred from the claim text.