Method for synthesizing coating printing thickening agent

A technology of pigment printing and synthesis method, which is applied in the field of chemical synthesis and fabric printing additive synthesis, which can solve the problems of application limitation of acrylic inverse emulsion thickener and achieve high thickening ability and high anti-seepage effect

Active Publication Date: 2012-08-08
成都德美精英化工有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The most commonly used acrylic reverse emulsion thickener in the domestic printing industry has been difficult to achieve a major breakthrough in the two core indicators of both thickening ability and anti-seepage effect, making my country's acrylic reverse emulsion thickener a high-end product in the printing industry. The application of the larger limit makes the

Method used

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  • Method for synthesizing coating printing thickening agent

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Effect test

preparation example Construction

[0013] Preparation steps of the present invention are:

[0014] Include the following steps:

[0015] (1) Polyurethane prepolymer preparation, take the polyether glycol 5-25 weight part of dehydration, 1,4-butanediol 2-7 weight part and toluene diisocyanate 20-40 weight part, in 70-100 ℃ for 2-4 hours, then lower the temperature to below 40 ℃, add 2-6 parts by weight of triethylamine to neutralize the pH value to 7, and add 0.15-1 part by weight of ethylenediamine under high-speed shearing to prepare polyurethane pre- Polymers; high-speed shearing generally requires a shearing speed greater than 1000 rpm.

[0016] (2) preparation of polyurethane-polyacrylic acid composite emulsion, adding in the prepolymer prepared in step (1): 40-80 parts by weight of acrylic acid, 10-20 parts by weight of acrylamide, 10-20 parts by weight of ethyl methacrylate and 0.1-0.3 parts by weight of ammonium persulfate, reacted at 30-90° C. for 1-3 hours, and then vacuumized to remove acetone to pr...

Embodiment 1

[0020] Weigh 5 parts by weight of dehydrated polyether diol, 2 parts by weight of 1,4-butanediol and 20 parts by weight of toluene diisocyanate, react at 70°C for 2 hours, then cool down to 40°C, add 2 parts by weight of triethylamine 0.15 parts by weight of ethylenediamine under high-speed shearing to obtain a polyurethane prepolymer;

[0021] Add to the prepolymer prepared above: 40 parts by weight of acrylic acid, 10 parts by weight of acrylamide, 10 parts by weight of ethyl methacrylate, 0.1 part by weight of ammonium persulfate, react at 30°C for 1 hour, and then vacuumize and remove In addition to acetone, the polyurethane-polyacrylic acid composite emulsion is obtained;

[0022] Ammonia water is added dropwise to the above compound emulsion, and the pH value of the emulsion is adjusted to 5.0, thereby preparing a novel pigment printing thickener with high thickening ability and high anti-seepage effect.

Embodiment 2

[0024] Weigh 25 parts by weight of dehydrated polyether diol, 7 parts by weight of 1,4-butanediol and 40 parts by weight of toluene diisocyanate, react at 100°C for 4 hours, then cool to 20°C, add triethylamine 6 Parts by weight are neutralized, and 1 part by weight of ethylenediamine is obtained under high-speed shear to obtain a polyurethane prepolymer;

[0025] Add to the prepolymer prepared above: 80 parts by weight of acrylic acid, 20 parts by weight of acrylamide, 20 parts by weight of ethyl methacrylate, 0.3 parts by weight of ammonium persulfate, react at 90°C for 3 hours, and then vacuumize and remove In addition to acetone, the polyurethane-polyacrylic acid composite emulsion is obtained;

[0026] Ammonia water is added dropwise to the above composite emulsion, and the pH value of the emulsion is adjusted to 6.0, thereby preparing a new type of pigment printing thickener with high thickening ability and high anti-seepage effect.

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Abstract

The invention discloses a method for synthesizing a coating printing thickening agent. The method comprises the steps of: preparation of polyurethane prepolymer, preparation of polyurethane-polyacrylic acid composite emulsion, dropwise addition of ammonia water into the composite emulsion for pH regulation, and the like. The high thickening capability of polyacrylic acid and the good diffusion resistant effect of polyurethane are utilized, an interpenetrating polymer network synthesis technology is adopted, and a novel coating printing thickening agent with high thickening capability and a good diffusion resistant effect is prepared by stepwise synthesis and accurate control over a reaction condition.

Description

technical field [0001] The invention belongs to the technical field of chemical synthesis, in particular to the technical field of fabric printing additive synthesis, in particular to a method for synthesizing a novel pigment printing thickener. Background technique [0002] Thickener is a rheological additive that plays a decisive role in controlling the rheology of the system. Pigment printing is a printing method in which polymer compounds are used to form a thin film on the fabric and the pigment is fixed on the fabric. Adding a thickener to the printing paste can increase its viscosity, reduce its fluidity, and make it pseudoplastic. Under the action of shear force, the viscosity decreases, and it is easy to leak from the mesh of the printing and dyeing screen to the printing and dyeing fabric. After losing the shear force, the viscosity increases, and it can remain in place without penetrating to other parts of the fabric. Secondly, the printing paste is distributed ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06P1/52C08G18/66C08G18/48C08G18/12C08F220/06C08F220/56C08F220/18D06P3/82
Inventor 陈荣义周波刘钢
Owner 成都德美精英化工有限公司
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