Graft copolymers and colorless, transparent electrophotographic

Details Graft copolymers and colorless, transparent electrophotographic Graft copolymers and colorless, transparent electrophotographic

1995-12-27

1998-05-12

Goodrow, John

Radiation imagery chemistry: process, composition, or product th

Electric or magnetic imagery, e.g., xerography,...

Post imaging process, finishing, or perfecting composition...

430114, G03G 913

Patent

active

057503060

ABSTRACT:
A graft copolymer of recurring units of (C.sub.6 -C.sub.18)alkyl (meth)acrylate (A), N-vinylpyrrolidone (B), glycidyl (meth)acrylate (C), and glycidyl (meth)acrylate units esterified with (meth)acrylic acid (D) onto which polymeric side chains of units of N-vinylpyrrolidone, (C.sub.1 -C.sub.3)alkyl acrylate and, if appropriate, (C.sub.1 -C.sub.3)alkyl methacrylate are grafted. The polymer is suitable as a binder for colorless, negatively chargeable liquid toners, in particular in combination with graft copolymers of (C.sub.1 -C.sub.6)alkyl (meth)acrylate, (C.sub.6 -C.sub.18)alkyl (meth)acrylate and units in which chains of N-vinyl-pyrrolidone units are grafted onto one of the units mentioned, as a charge control agent. 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.

REFERENCES:
patent: 3880656 (1975-04-01), Nagashima et al.
patent: 4148968 (1979-04-01), Nagashima et al.
patent: 5334475 (1994-08-01), Kato
patent: 5478688 (1995-12-01), Spiewak et al.
patent: 5565297 (1996-10-01), Larson et al.

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