Cross-linking reaction during melt kneading produces resinous el

Details Cross-linking reaction during melt kneading produces resinous el Cross-linking reaction during melt kneading produces resinous el

1978-07-31

1980-08-12

Welsh, John D.

Radiation imagery chemistry: process, composition, or product th

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

Process of making developer composition

430109, 528503, 428402, 260 42, 260 4229, G03G 914

Patent

active

042174066

ABSTRACT:
A process for producing an electrophotographic toner composition comprising melt-kneading (a) a cross-linkable functional group-containing resin and (b) a colorant, with (c) a polyfunctional resin capable of reacting with the cross-linkable functional group-containing resin (a) or a low molecular weight cross-linking agent capable of cross-linking the cross-linkable functional group-containing resin (a), the amount of the polyfunctional resin or the low molecular weight cross-linking agent (c) being such that the amount of the functional groups present in the polyfunctional resin or the low molecular weight cross-linking agent (c) being equivalent to or less than equivalent to the amount of the functional group present in the cross-linkable functional group-containing resin (a); cross-linking by heating and generating a shearing force during melt-kneading to produce a slightly cross-linked colored resin such that the adhesion properties and the grindability of the slightly cross-linked colored resin are not deteriorated, and pulverizing the slightly cross-linked colored resin to produce the electrophotographic toner composition.

REFERENCES:
patent: 2418688 (1947-04-01), Atwood
patent: 3740334 (1973-06-01), Jacknow et al.
patent: 3775326 (1973-11-01), Westdale

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