Radiation imagery chemistry: process – composition – or product th – Electric or magnetic imagery – e.g. – xerography,... – Post imaging process – finishing – or perfecting composition...
Patent
1998-02-27
2000-02-08
Goodrow, John
Radiation imagery chemistry: process, composition, or product th
Electric or magnetic imagery, e.g., xerography,...
Post imaging process, finishing, or perfecting composition...
430137, G03G 909
Patent
active
060226595
ABSTRACT:
A yellow toner for developing electrostatic images is formed of yellow toner particles containing a binder resin and a yellow colorant. The yellow toner has a storage modulus G'.sub.180 at 180.degree. C. and a minimum storage modulus G'.sub.min(120-170) in a temperature range of 120-170.degree. C. giving a ratio [G'.sub.180 /G'.sub.min(120-170) ] of 2.0-8.0. The binder resin comprises a polyester resin having a glass transition temperature of 50-65.degree. C. and an acid value of 2.0-25.0 mgKOH/g. The yellow toner is a compound represented by Formula (1) below:
Formula (1): ##STR1## The primary particles of the yellow colorant exhibit a length/breadth ratio of at most 1.5. The yellow colorant is dispersed in the toner particles as independent particles (including primary particles and secondary particles) providing a number-average particle size of 0.1-0.7 .mu.m. The yellow toner is provided with improved fixability and anti-offset property as well as good color toner performances.
REFERENCES:
patent: 5578407 (1996-11-01), Kasuya et al.
patent: 5578408 (1996-11-01), Kohtaki et al.
patent: 5843605 (1998-12-01), Anno et al.
Patent Abstracts, Japan, vol. 18, No. 674 (p. 1846) Dec. 1994 for JP 06-266163.
Ida Tetsuya
Iida Wakashi
Kanbayashi Makoto
Taya Masaaki
Canon Kabushiki Kaisha
Goodrow John
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