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. 31, 1977
Filed:
Jul. 21, 1975
Applicant:
Inventors:
Ivana Gavrilova, Prague, CS;
Slavko Hudecek, Prague, CS;
Assignee:
Ceskoslovenska akademie ved, Prague, CS;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08F / ; C08F / ;
U.S. Cl.
CPC ...
526 15 ; 260 / ; 526 16 ; 526208 ; 526209 ; 526210 ; 526212 ; 526217 ; 526271 ; 526292 ; 526317 ; 526909 ;
Abstract
There is disclosed a process for producing carboxyl-containing hydrophilic polymeric fillers comprising polymerizing at least one carboxyl-containing monomer with a cross-linking monomer in an oxygen bearing organic solvent for the monomers and in the presence of a free radical catalyst to form a polymeric precipitate and treating the thus formed polymeric precipitate with a solution containing sodium, potassium or ammonium ions thereby transforming the same into the corresponding polymeric salt, said solvent being a non-solvent for the polymer.