Crystalline polyester

Details Crystalline polyester Crystalline polyester

2007-04-24

2007-04-24

Yoon, Tae H (Department: 1714)

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

Synthetic resins

From phenol, phenol ether, or inorganic phenolate

C528S302000, C430S109400

Reexamination Certificate

active

10758416

ABSTRACT:
A crystalline polyester prepared by polycondensing an alcohol component comprising 1,6-hexanediol in an amount of 60% by mol or more, with a carboxylic acid component comprising fumaric acid in an amount of 60% by mol or more, wherein the crystalline polyester has a ratio of a softening point to the maximum peak temperature of heat of fusion is from 0.6 to 1.3, and wherein a tetrahydrofuran-soluble component of the crystalline polyester has a number-average molecular weight of from 1500 to 10000, and the crystalline polyester has a softening point of from 50° to 120° C.; a resin binder for a toner comprising the crystalline polyester; and a toner comprising the resin binder. The crystalline polyester can be used as a resin binder for a toner used, for example, for developing electrostatic latent images formed in electrophotography, electrostatic recording method, electrostatic printing method, and the like.

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