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:
Nov. 30, 1976
Filed:
Apr. 23, 1975
Applicant:
Inventors:
Noel Vanlautem, Brussels, BE;
Julien Mulders, Dworp, BE;
Assignee:
Solvay & Cie, Brussels, BE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07C / ;
U.S. Cl.
CPC ...
2605 / ;
Abstract
A process is provided for the manufacture of salts of poly-alpha-hydroxyacrylic acids, which salts contain monomeric units of the formula ##EQU1## wherein R.sub.1 and R.sub.2 independently represent hydrogen or an alkyl group containing 1 to 3 carbon atoms and wherein M represents a cationic radical resulting from the dissociation of a base. A solid polylactone derived from the corresponding poly-alpha-hydroxyacrylic acid is reacted with the base in the presence of water and the reaction is carried out in a liquid medium containing a diluent so that the polyacetone and the salt produced do not dissolve in the medium.