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:
May. 01, 1990
Filed:
Mar. 08, 1989
Applicant:
Inventors:
Assignee:
Wella Aktiengesellschaft, Darmstadt, DE;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C08B / ; C07G / ; A61K / ; A61K / ;
U.S. Cl.
CPC ...
536 20 ; 536124 ; 514 55 ; 514881 ; 514846 ; 424 70 ; 424 47 ;
Abstract
The quaternary chitosan derivatives useful in cosmetic compositions are made by a process comprising reacting a chitosan consisting of 50 to 100% deacetylized chitin or a structurally modified chitosan made by reprecipitating and deep freezing, with glycidyl trialkyl ammonium halogenide, particularly glycidyl trimethyl ammonium chloride, and, if necessary, with glycidol. The reaction mixture is advantageously stirred for several hours at 10.degree. to 100.degree. C. The reaction may be performed in the presence of an organic or inorganic acid or base in water.