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Curable polyester latex made by phase inversion emulsification

A phase inversion method, polyester-based technology, applied in the direction of instruments, optics, developer, etc., can solve the problems of low overall batch yield, uneconomical, etc.

Inactive Publication Date: 2013-02-06
XEROX CORP
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This approach is generally uneconomical as it uses a solvent-to-resin ratio of 10 to 1 and has low overall bulk yields (<15% solids)

Method used

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  • Curable polyester latex made by phase inversion emulsification

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Embodiment

[0086] To optimize the preparation of curable unsaturated polyester emulsions by the phase inversion technique, a full factorial analysis with 3 replicates was performed2 3 L-8 design. The three variables studied were temperature, solvent ratio (SR) and neutralization ratio (NR). The polyester resin used was poly(propoxylated bisphenol-A co-fumarate), available from Reichold Chemicals as XP777. The phase inversion reagent is isopropanol, and the neutralizing agent is ammonium hydroxide.

[0087] 192 grams of polyester resin XP777 purchased from Reichold with an acid value of 14.08 g / KOH, 8 grams of Irgacure 814 purchased from Ciba Geigy, 100 grams of methyl ethyl ketone (MEK) and 25 grams of isopropanol were charged into a in a 1-liter kettle with a mechanical stirrer and distillation apparatus.

[0088] The solvent ratio (SR) was calculated as the ratio of solvent to solids. In Experiment I-Y1, the ratio of methyl ethyl ketone solvent (100 grams) to solids (200 grams, co...

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Abstract

A process for preparing a curable polyester based emulsion is provided in embodiments, containing one or more unsaturated polyesters and one or more photoinitiators obtained by a phase inversion process, in which the particle size and particle size distribution is controlled by process parameters, such as solvent, solvent ratio, neutralization ratio of the resin and temperature.

Description

technical field [0001] The present disclosure relates to methods of making curable polyester-based emulsions. Background technique [0002] There is a need for robust toner images and clear curable toner overcoats, especially heat, chemical and mechanical resistant. A curable toner composition including an unsaturated polyester resin and a UV photoinitiator produces robust image properties after fusing with a fixing device including a UV lamp. However, such toners have been prepared by the emulsion aggregation ("EA") method utilizing emulsions prepared by the solvent flash method. This approach is generally uneconomical as it uses a solvent to resin ratio of 10 to 1 and has low overall batch yields (<15% solids). There is a need for a more economical method for preparing emulsions comprising one or more unsaturated resins and one or more photoinitiators. [0003] The present disclosure is a method of preparing curable unsaturated polyester emulsions by phase inversion ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08J3/03C08L67/06G03G9/08
CPCC08J2367/02C08J3/07
Inventor G·G·萨克里潘特G·利伯曼N·贝利沃S·S·邱
Owner XEROX CORP