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Compound thickening agent and preparation method thereof

A thickening agent and matching technology, which is applied in the field of printing and dyeing auxiliaries, can solve the problems of increasing the volume of aggregates and difficulty of movement, low paste-forming rate of thickener white paste, and low efficiency of de-paste, etc. Improve thickening efficiency, improve the effect of thickening effect

Pending Publication Date: 2022-03-04
HANGZHOU TRANSFAR FINE CHEM CO LTD +2
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  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

[0009] Aiming at the defects of the prior art, the present invention provides a composite thickener and a preparation method thereof, by introducing a cationic emulsion into the existing acrylic anionic emulsion for compounding, utilizing the anion and cation emulsions between the cationic emulsion and the anionic emulsion. The electrostatic interaction of ions attracting each other increases the aggregate volume and movement difficulty of the anionic emulsion after swelling, thereby improving the thickening effect of the thickener and solving the problem of low paste rate of white paste in the prior art acrylic anionic emulsion thickener, Technical problems such as poor salt tolerance and low depaste efficiency

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  • Compound thickening agent and preparation method thereof
  • Compound thickening agent and preparation method thereof

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preparation example Construction

[0059] The present invention also provides a kind of preparation method of described composite thickener, comprises the steps:

[0060] (1) Carry out reverse-phase suspension polymerization of unsaturated cationic monomers, crosslinking agents and functional monomers in hydrocarbon solvents under the action of initiators and emulsifiers, and then invert phases to obtain cationic emulsions;

[0061] (2) Under the action of initiator and emulsifier, unsaturated acidic monomers, crosslinking agents and functional monomers are subjected to reverse phase suspension polymerization in hydrocarbon solvents and then phase inversion to generate acrylic anionic emulsions;

[0062] (3) Compounding the cationic emulsion described in step (1) with the acrylic anionic emulsion described in step (2) to obtain the composite thickener.

[0063] In some embodiments, step (1) includes the following sub-steps:

[0064] (1-1) Preparation of water phase: dissolve unsaturated cationic monomers and f...

Embodiment 1

[0078] Preparation of the cationic emulsion: 14 g of dimethyl diallyl ammonium chloride, 2 g of potassium persulfate, 34 g of acrylamide and 30 g of deionized water were uniformly mixed under stirring at room temperature to prepare an aqueous phase. 2g of diallyl phthalate, 5g of sorbitan monooleate, and 35g of kerosene were uniformly mixed to form an oil phase. Add the water phase to the oil phase, stir and emulsify at 700rpm for 10min to obtain a stable emulsion. Under the protection of nitrogen, raise the temperature of the emulsion in the flask to 50-60°C, the reaction will start gradually, and the temperature of the system will gradually rise. After reaching room temperature, 3 g of Pingpinga O was added and stirred for 10 min. The average particle size Z-average of the cationic emulsion was measured to be 3.5um.

[0079] Preparation of anionic emulsion: neutralize 50g of acrylic acid with 70g of liquid caustic soda under stirring at room temperature, and add 0.5g of po...

Embodiment 2

[0082] Preparation of the cationic emulsion: 10 g of methacryloyloxyethyltrimethylammonium chloride, 3 g of ammonium persulfate and 30 g of deionized water were uniformly mixed under stirring at room temperature to obtain an aqueous phase. 3g of divinylbenzene, 34g of ethyl acrylate, 5g of sorbitan monostearate, and 35g of kerosene were uniformly mixed to form an oil phase. Add the water phase to the oil phase and stir at 600rpm for 15min to obtain a stable emulsion. Under the protection of nitrogen, raise the temperature of the emulsion in the flask to 50-60°C, the reaction will start gradually, and the temperature of the system will gradually rise. To room temperature, add 3g Pingpingjia A-25, and stir for 10min. The average particle diameter Z-average=4.8um of the cationic emulsion was measured.

[0083] Preparation of anionic emulsion: 60g of methacrylic acid was neutralized with 70g of liquid caustic soda under stirring conditions at room temperature, and 0.7g of ammoni...

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Abstract

The invention belongs to the technical field of printing and dyeing auxiliaries, and particularly relates to a compound thickening agent and a preparation method thereof. According to the compound thickening agent provided by the invention, the cationic emulsion is introduced into the acrylic acid series anionic emulsion, and the electrostatic interaction of mutual attraction of anions and cations of the acrylic acid series anionic emulsion and the cationic emulsion is utilized, so that the aggregate volume after swelling of the anionic emulsion is increased, and the movement difficulty of polymer particles is increased; the thickening effect of the thickening agent is improved, and experiments prove that the compound thickening agent not only improves the white slurry viscosity, but also greatly improves the salt tolerance and the paste removal rate of the thickening agent. By adopting the method disclosed by the invention, the demulsification instability phenomenon generated during conventional anion / cation compounding can be avoided, and the compounded thickening agent emulsion has good thickening and de-pasting effects.

Description

technical field [0001] The invention belongs to the technical field of printing and dyeing auxiliaries, and more specifically relates to a compound thickener and a preparation method thereof. Background technique [0002] Printing is a comprehensive process of obtaining colored patterns on local parts of the fabric. In addition to the necessary chemical auxiliaries, there is a very important component in the printing paste - thickener. Thickener is a kind of hydrophilic substance that can increase the viscosity of the system. There are many types of thickeners, including natural hydrophilic polymers and their modified products, emulsified or semi-emulsified pastes, and synthetic thickeners. A long time ago, thickeners for printing and dyeing were mostly natural hydrophilic polymers and their modified products, such as starch, cellulose, sodium alginate, xanthan gum, etc. The consumption is large, and it is greatly affected by the source, purity, cost, storage, etc. In the...

Claims

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Application Information

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IPC IPC(8): D06P1/52C08F220/56C08F226/02C08F220/06C08F220/18C08F220/34C08F212/08C08F222/02
CPCD06P1/525D06P1/5221C08F220/56C08F220/06C08F220/1802C08F212/08C08F222/02C08F220/1804C08F226/02C08F220/34
Inventor 于本成柴宇伦王静昌卢奕江袁国伟陈八斤姚从春游爱鸳王胜鹏
Owner HANGZHOU TRANSFAR FINE CHEM CO LTD
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