Patent · US Expired

Graft copolymers and colorless, transparent electrophotographic toners thereof

US5714296A · kind A · utility

5Cited by

5References

15Claims

0Family size

Assignee

Agfa-Gevaert NV · BE

Inventors

Raimund J. Faust · Wiesbaden, DE
Danuta Eva Allen · Wiesbaden, DE

Key dates

Filing date	Dec 27, 1995
Grant date	Feb 3, 1998
Priority date	—
Expiry date	Dec 27, 2015

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10S430/105
WIPO fieldOptics
WIPO sectorInstruments

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.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.