Binder resin for a toner for developing electrostatic images, an

Details Binder resin for a toner for developing electrostatic images, an Binder resin for a toner for developing electrostatic images, an

1990-04-23

1993-06-15

Seidleck, James J.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Mixing of two or more solid polymers; mixing of solid...

525265, 525279, 525285, 525289, 525308, 525292, 525302, 525303, 525267, 430109, C08F25702, G03G 908

Patent

active

052199479

ABSTRACT:
A toner for developing electrostatic latent images with a good combination of fixability, anti-offset characteristic, anti-sticking characteristic and pulverizability is provided as a composition comprising a colorant or magnetic material and a binder resin. The binder resin has 0.1 to 60 wt. % of a chloroform-insoluble or a THF (tetrahydrofuran)insoluble and a THF-soluble, the THF-soluble providing a molecular weight distribution in the chromatogram of GPC (gel permeation chromatography) thereof such that there are a main peak in the molecular weight range of 1,000 to 25,000 and a sub-peak or shoulder in the molecular weight range of 2,000 to 150,000. The binder resin may suitably be obtained through two polymerization steps including a solution polymerization step and a suspension polymerization step.

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Patent Abstracts of Japan, vol. 7, No. 87 (P-190)[1232] Apr. 12, 1983, JP-A-58 14 147 (Konishiroku Shashin Kogyo K.K.) Jan. 26, 1983.
Patent Abstracts of Japan, vol. 7, No. 184 (P-216) [1329] Aug. 13, 1983, JP-A-58 86 558 (Nippon Carbide Kogyo K.K.) May 24, 1983.
Patent Abstracts of Japan, vol. 9, No. 170 (P-373) [1893] Jul. 16, 1985, JP-A-60 46 566 (Hitachi Kasei Kogyo K.K.) Mar. 13, 1985.
Patent Abstracts of Japan, vol. 9, No. 253 (P-395) [1976] Oct. 11, 1985, JP-A-60 104 956 (Canon K.K.) Jun. 10, 1985.
Japan Patent Abstract 2930550 from Japanese Laid-Open Appln. 56-158340 published Dec. 7, 1981.

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