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:
Feb. 03, 1998
Filed:
Dec. 27, 1995
Raimund Josef Faust, Wiesbaden, DE;
Danuta Eva Allen, Wiesbaden, DE;
Agfa-Gevaert AG, Leverkusen, DE;
Abstract
A graft copolymer of recurring units of (C.sub.6 -C.sub.18)alkyl (meth)acrylate (A), vinylpyridine (B), glycidyl (meth) acrylate (C), and glycidyl (meth) acrylate units esterified with (meth)acrylic acid (D) onto which polymeric side chains of units of vinylpyridine, (C.sub.1 -C.sub.3)alkyl acrylate, and optionally (C.sub.1 -C.sub.3)alkyl methacrylate are grafted. The polymer is suitable as a binder for colorless, positively chargeable liquid toners, in particular in combination with a copolymer of (C.sub.6 -C.sub.18)alkyl (meth) acrylate and hydroxyalkyl (meth)acrylate as charge control agents. After fixing of the electrophotographically produced toner image, the toners give colorless resist masks or printing screens with a high resistance toward etching agents and solvents.