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Latex preparation process

A technology of latex and latex particles, which is applied in the field of preparing latex emulsion and toner, and can solve problems such as difficulty in achieving batch consistency

Inactive Publication Date: 2012-10-31
XEROX CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Also, consistency between batches is often difficult to achieve because there may be variations from one batch to another

Method used

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  • Latex preparation process
  • Latex preparation process
  • Latex preparation process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0107] use figure 1 The extruder depicted in was used to continuously prepare solvent-free linear amorphous polyester emulsions.

[0108] Linear propoxylated bisphenol A fumarate polyester resin GTUF (commercially available from Kao Corporation, Japan) was charged into the extruder at a rate of about 2 lbs / hour, and deionized Water, sodium bicarbonate, and alkyl diphenyl ether disulfonate ionic surfactant (commercially available as DOWFAX® from The Dow Chemical Company) TM 2A1) in water, independently pumped into the extruder downstream of the extruder at a rate of about 100 g / min, the extruder rotating at about 900 rpm at a temperature of about 20°C. The formulations are summarized in Table 1 below:

[0109] Table 1

[0110] Linear Polyester (GTUF)

29.28％

sodium bicarbonate

0.73％

Dowfax 2A1

1.76％

Deionized water

68.23％

[0111] The emulsified particles were collected at the end of the extruder and the particle...

Embodiment 2

[0122] use figure 1 The extruder depicted in was used to continuously prepare solvent-free linear crystalline polyester emulsions.

[0123] A3C crystalline polyester (a proprietary blend of 1,4-butanediol, fumaric acid, and adipic acid obtained from Kao Corporation (Japan)) was fed to the extruder at a rate of about 4 lbs / hour , and will contain deionized water, sodium bicarbonate and DOWFAX TM An aqueous solution of 2A1 (alkyldiphenyl ether disulfonate anionic surfactant from The Dow Chemical Company) was pumped into the extruder downstream of the extruder at a rate of about 100 g / min, and the extruder was running at about 1100 rpm. Speed ​​rotation, temperature about 20°C. The formulations are summarized in Table 3 below:

[0124] table 3

[0125] Crystalline Polyester (A3C)

29.28％

sodium bicarbonate

0.73％

Dowfax 2A1

1.76％

Deionized water

68.23％

[0126] The emulsified particles were collected at the end of ...

Embodiment 3

[0132] A high molecular weight amorphous polyester resin comprising 1,4-benzenedicarboxylic acid and 1,3-dihydro-1,3-dioxo-5 was emulsified in a multi-screw extruder -isobenzofuran carboxylic acid, 3-(dodecen-1-yl)dihydro-2,5-furandione, α,α′-[(1-methylethylene)di-4,1 -phenylene]bis[Ω-hydroxypoly(oxy-1,2-ethanediyl)] and α,α′-[(1-methylethylene)bis-4,1-phenylene]bis Conjugation of [Ω-hydroxypoly[oxy(methyl-1,2-ethylenediyl)]]. The polyester resin 1 was charged into the extruder at a rate of about 6 lbs / hour, and an ionic surfactant (commercially available from Tayca Corporation (Japan)) was injected downstream at a rate of about 166 grams / minute, Next, about 10% NaOH solution was injected at a rate of about 66 g / min. The emulsion was processed in the extruder at a screw speed of about 500 rpm and a barrel temperature of about 100°C.

[0133] The emulsion particles were collected and the particle size and size distribution were measured as described in Example 1 above. Fig...

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Abstract

Processes for continuously forming latex emulsions useful in preparing toners are provided which do not require the use of solvents. The process comprises: providing at least one polyester resin possessing at least one acid group in a reaction vessel; neutralizing the at least one acid group by contacting the resin with alkali; emulsifying the neutralized resin by contacting the neutralized resinwith at least one surfactant in the absence of a toner solvent to provide a latex emulsion containing latex particles; and continuously recovering the latex particles.

Description

technical field [0001] This invention relates to methods of making latex emulsions and toners. More specifically, a continuous polymerization method of polyester using a polycondensation reaction and a continuous emulsification method of polyester are described. Background technique [0002] Methods of forming toner compositions for use in electrophotographic devices, electrophotographic devices, or xerographic printing or xerographic copying devices have been previously disclosed. For example, methods of preparing emulsion aggregation (EA) type toners are known and toners may be formed by aggregating a colorant with a latex polymer formed by a batch or semi-continuous emulsion polymerization process. For example, US Patent No. 5,853,943, the entire disclosure of which is incorporated herein by reference, relates to a semi-continuous emulsion polymerization process for preparing latex by first forming a seed polymer. Other examples of emulsion / agglomeration / coalescence pro...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08J3/12C08G63/16C08G63/91
CPCC08J3/05C08J2367/02G03G9/087C08G63/88C08G63/89C08C1/02
Inventor J·T·卓Z·赖C-M·程J·L·里奥纳德Y·童T·L·林肯S·库马C·L·迪梅
Owner XEROX CORP
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