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:
Aug. 10, 1993
Filed:
Sep. 27, 1991
Tetsuo Ito, Oi, Kukizakimachi, Inashiki gun, Ibaraki-ken, JP;
Osamu Kurita, Tsuchiura-shi, JP;
Kenji Yasuda, Ushiku-shi, JP;
Masayuki Takahashi, Tsukuba-shi, JP;
Other;
Abstract
An oxygen-permeable polymer is prepared by polymerizing (1) at least one first monomer selected from the group consisting of alkenes of 6-10 carbon atoms having one double bond and one side chain methyl group, and (2) at least one second monomer selected from the group consisting of (fluoro)siloxanylalkyl mono(meth)acrylates, (fluoro)siloxanylalkyl di(meth)acrylates, fluoroalkyl (meth)acrylates, alkyl (meth)acrylates, .alpha.-alkyl- or .alpha.-fluoroalkyl-acrylic acids, alkyl .alpha.-alkylacrylates, alkyl .alpha.-fluoroalkylacrylates, fluoroalkylacrylates, fluoroalkyl .alpha.-fluoroalkylacrylates and fluoroalkyl .alpha.-ackylacrylates, the copolymerization proportions of the first monomer and the second monomer being such that the first monomer ranges from 5-80% by weight and the second monomer ranges from 20-95% by weight. The polymer produced by the process has very high oxygen permeability, is resistant to adhesion and adsorption of staining substances present in lacrima or intraocular solution, and has excellent machinability and grindability.