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:
Jan. 11, 2005
Filed:
May. 30, 2000
Richard Paul Redman, Surrey, GB;
Laurence Gerald Hughes, Surrey, GB;
Richard Neil Templar Freeman, Surrey, GB;
Andrew Lennard Lewis, Surrey, GB;
Richard Paul Redman, Surrey, GB;
Laurence Gerald Hughes, Surrey, GB;
Richard Neil Templar Freeman, Surrey, GB;
Andrew Lennard Lewis, Surrey, GB;
Biocompatibles UK Limited, Surrey, GB;
Abstract
Copolymers of zwitterionic monomer, especially 2-methacryloyloxyethyl-2'-trimethylammoniumethyl phosphate inner salt, and hydrophobic comonomer, especially dodecylmethacrylate, are made in a monomer starved polymerization process in which solutions of monomers are fed to the reaction vessel in which initiator is present over an extended period. The copolymers have improved compositional uniformity and provide better coatings on a range of substrates. The novel copolymers can be distinguished from prior art batch type bulk solution polymerization polymers of the same monomer composition by solubility characteristics especially in alcohol/water mixtures. Particularly preferred coating compositions comprise an alcohol:water mixture containing around 20 to 40% by volume alcohol.