Developer composition for developing electrostatic image and toner image forming process
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United States of America Patent
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Oct 2, 1990
Issued Date -
N/A
app pub date -
Sep 25, 1989
filing date -
Jul 31, 1986
priority date (Note) -
Expired
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Abstract
A toner for developing an electrostatic latent image containing a polyester resin binder obtained by condensation polymerization of a diol component and a mixture of acid components. The acid components are an aliphatic unsaturated dicarboxylic acid or an acid anhydride thereof and a polybasic carboxylic acid having not less than three carboxylic acid groups or an acid anhydride thereof. A ratio of the polybasic carboxylic acid having not less than three carboxylic acid groups or the acid anhydride thereof to the total acid components is in the range of from 5 mol % to less than 30 mol %.
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