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:
Sep. 11, 1990
Filed:
Jun. 07, 1989
Ceskoslovenska akademie ved, Prague, CS;
Abstract
The solution concerns hydrophilic transparent crosslinked copolymers and a method for their production. A substance of the solution is the hydrophilic copolymer which can be prepared by the radical copolymerization of monomers with the general formula I, where R is hydrogen or methyl, alone or in their mutual combinations or by copolymerization of the monomers with general formula I and the monomers with general formula II, where R.sup.1 means hydrogen or methyl and X is a group OCH.sub.2 CH.sub.2 OH, OCH.sub.2 CH(OH)CH.sub.3, OCH.sub.2 CH(OH)CH.sub.2 OH, (OCH.sub.2 CH.sub.2).sub.3 OH, (OCH.sub.2 CH.sub.2).sub.2 OH, alkoxyl from OCH.sub.3 to OC.sub.16 H.sub.33, NH.sub.2, NHCH.sub.2 (OH)CH.sub.3, N(C.sub.2 H.sub.5).sub.2, and NH-tert-C.sub.4 H.sub.9, whereas the content of monomers of the general formula I and II amounts to 40 to 99.99 wt.-% of the entire mixture, where at least 5 wt.-% form the monomers of general formula I, with 0.01 to 60 wt.-% of a crosslinking agent, related to the entire monomer mixture, which has at least two olefinic double bonds, in the presence of radical initiators. ##STR1##