Leather dressing composition of an aqueous emulsion of solvent solutions of substituted celluloses and polyurethanes
AssigneeKEPEC Chemische Fabrik GmbH
InventorsPeter Junge, Horst Schulz, Rainer Schneider, Werner Dreke, Gerhard Rieger
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Abstract
A composition for dressing leather and leather substitutes comprising an aqueous emulsion of (A) an organic solvent solution of nitrocellulose or cellulose acetate butyrate and (B) an organic solvent solution of a linear polyurethane resin, in a ratio of A : B of 1 : 0.1 to 1 : 10.
Claims12
A composition for dressing leather and leather substitutes comprising an aqueous emulsion of organic solvent solutions of (A) a substituted cellulose selected from the group consisting of nitrocellulose having a D.S. of 1.9 to 2.4, cellulose acetate butyrate having a D.S. of 2.0 to 2.8 with a ratio of acetyl to butyryl groups of 1:1 to 4:1, and mixtures thereof, and (B) a linear polyurethane resin having a molecular weight range of from 10,000 to 500,000, in a weight ratio of A:B of 1:0.1 to 1:10, where the weight ratio of organic solvents to water is from 6:1 to 1:1, said aqueous emulsion containing from 10% to 60% by weight, based on the dry weight of said substituted cellulose of a non-ionic surface-active compound as an emulsifier and said organic solvents being water-immiscible and volatile in the temperature range of 80.degree. to 160.degree. C.
Dependencies are inferred from the claim text.