Abstract: Self-adhesive sheet materials may be made by applying to the surface of a sheet an adhesive composition comprising the polymer of an acrylic ester of a saturated alcohol with two to twelve carbon atoms, a surfactant, and dextrin. When the proportion of dextrin is within the range of 4 to 30% by weight, based on the weight of the components specified, and especially when the alcohol has at least four carbon atoms, the adhesive provides pressure-sensitive, releasable, articles, e.g., label or tapes.
Abstract: The adhesion, especially wet adhesion, properties of conventional polymer latices are greatly improved by the incorporation of groups derived from the reaction of carbonyl groups with hydrazines therein. The hydrazine-modified groups can be present in any component of the polymer latex, but are advantageously part of the main polymer itself. Preferred main polymers are therefore those containing carbonyl units capable of reacting with hydrazine or a substituted hydrazine, especially copolymers of N-3-oxyhydrocarbon-substituted acrylamides such as diacetone acrylamide. Significantly improved wet adhesion properties are obtained even with very low proportions of the hydrazone-modified groups.
Type:
Grant
Filed:
November 5, 1973
Date of Patent:
November 27, 1979
Assignee:
Harlow Chemical Company Limited
Inventors:
John M. Cruden, Alan J. Bignold, Roger H. Green, Ronald J. Grisenthwaite
Abstract: A process for the production of a multicoloured paint which comprises admixing two or more differently coloured hydroxyethyl cellulose-containing aqueous polymer emulsions with a dispersion of a clay of the formula ##EQU1## WHEREIN M is a cation, x is a value greater than zero and less than 6, y is from 1.00 up to but less than 4 and n is an integer from 1 to 3, to form a multicoloured paint dispersion consisting of discrete coloured aqueous polymer emulsion particles as the disperse phases in an aqueous continuous phase of the clay dispersion.