Toner for development of electrostatic images and image forming

Details Toner for development of electrostatic images and image forming Toner for development of electrostatic images and image forming

1988-12-22

1990-07-10

Welsh, J. David

Radiation imagery chemistry: process, composition, or product th

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

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

430904, 525934, G03G 910

Patent

active

049406442

ABSTRACT:
This invention relates to a toner for development of electrostatic images to be used for development of electrostatic images formed in electrophotography, electrostatic printing, electrostatic recording, etc., and an image forming method by use thereof.
The toner of the present invention uses a resin constituted mainly of a copolymer comprising a crystalline polymer block and an amorphous polymer block chemically bound together, the cyrstalline polymer block has a specific melting point, the amorphous polymer block has a specific glass transition point, the moduli of the toner has a value with a specific range, and therefore according to the present invention, a toner excellent in durability can be provided, which is capable of fixing sufficiently even at a low temperature and yet also good in off-set resistance within such a temperature range, further having excellent anti-blocking characteristic, flowability, charging characteristic, anti-filming characteristic, cleaning property, thus being capable of forming good visible images stably.

REFERENCES:
patent: 3740334 (1973-06-01), Jacknow et al.
patent: 4002570 (1977-01-01), Lindblad
patent: 4012363 (1977-03-01), Bruning et al.
patent: 4145300 (1979-03-01), Hendriks

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