The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 03, 1981
Filed:
Aug. 13, 1979
Applicant:
Inventor:
Karl Schafer, Leverkusen, DE;
Assignee:
Bayer Aktiengesellschaft, Leverkusen, DE;
Attorneys:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
D06M / ; D06M / ; D06M / ;
U.S. Cl.
CPC ...
81276 ; 81155 ; 81156 ; 8128 / ; 8DIG / ;
Abstract
This disclosure is concerned with an improved process of treating keratin-containing fiber materials with aqueous solutions of polyisocyanate bisulphite adducts to improve their resistance to felting and shrinkage. The material is pretreated with an aqueous bath containing both a compound carrying a cationic group and the salt of a polyvalent metal or the material is pretreated with just the cationic compound but the polyvalent metal salt is present in the aqueous bath used to apply the bisulphite adduct.