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Preparation method of novel efficient thickener polyacrylate copolymer

A polyacrylate and thickener technology, which is applied in the field of preparation of new high-efficiency thickener polyacrylate copolymers, can solve the problems of dispersion and post-neutralization, and achieve high alcohol tolerance, high product quality, Huge application prospects and the effect of market economic benefits

Pending Publication Date: 2022-04-08
HEFEI ALL PLUS ENVIRONMENTAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the water and dispersion of the carbomer resin powder prepared by this method are acidic. In the process of use, it is required to carry out post-neutralization with an inorganic base or an organic base to form a neutralized gel to achieve the thickening effect. The diffusion of alkaline neutralizer inside the polymer does not immediately form a gel, and there are components incompatible with the acidic form of the acrylic polymer in the formulation composition, so there is a typical dispersion of carbomer during use and post-neutralization problem

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Add 140g of tert-butanol, 10g of deionized water, 35g of sodium bicarbonate, and 0.18g of pentaerythritol triallyl ether to a 500ml four-necked flask in sequence, keeping the temperature below 25°C; blowing nitrogen gas and stirring for 20-30min; heat up To 60°C, add 0.1g of lauryl peroxide, and slowly add 30g of acrylic acid monomer within 1h, about 10-20Min the polymerization reaction starts, the solid precipitates out, and the system gradually thickens; after reacting at 60°C for 4h, the temperature is raised to 65°C, add 0.05g of lauryl peroxide, continue to react for 2h, the reaction is over, the system exists in a viscous form; finally, the temperature is further raised to 90°C, until all the solvent is evaporated, and a white fluffy powder is obtained in a four-necked flask.

Embodiment 2

[0022] Add 145g tert-butanol, 5g deionized water, 32.9g ammonium bicarbonate (other steps of polymerization method 2 are carried out similarly to polymerization method 1) and 0.18g pentaerythritol triallyl ether to a 500ml four-necked flask successively, keeping The temperature does not exceed 25°C; mix and stir with nitrogen for 20-30min; heat up to 60°C, add 0.1g lauryl peroxide, and add 30g acrylic acid monomer within 1h, the polymerization reaction starts in about 10-20Min, and the solid precipitates out. The system gradually thickened; after reacting at 60°C for 4 hours, the temperature was raised to 65°C, 0.05g of lauryl peroxide was added, and the reaction was continued for 2h. The solvent was all evaporated, and a white fluffy powder was obtained in a four-neck flask.

Embodiment 3

[0024] Add 145g of tert-butanol, 5g of deionized water, 32.9g of ammonium bicarbonate, and 0.18g of trimethylolpropane triacrylate to a 500ml four-necked flask in sequence, keeping the temperature below 25°C; blowing nitrogen and stirring for 20-30min ;Heat to 60°C, add 0.1g of azobisisobutyronitrile, and add 30g of acrylic acid monomer within 1h, the polymerization reaction starts in about 10-20Min, the solid precipitates out, and the system gradually thickens; react at 60°C for 4h Finally, raise the temperature to 65°C, add 0.05g of azobisisobutyronitrile (the other steps of polymerization method 3 are similar to polymerization method 1), and continue the reaction for 2 hours. After the reaction is completed, the system exists in a viscous form; to 90°C until the solvent was completely evaporated, and a white fluffy powder was obtained in a four-neck flask.

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Abstract

The invention discloses a preparation method of a novel efficient thickening agent polyacrylate copolymer, which is characterized by comprising the following steps: step 1, mixing an organic solvent and water according to a certain proportion, and adding into a reaction kettle; 2, sequentially adding a second active monomer, a neutralizer and a cross-linking agent into the mixed solvent, stirring, introducing nitrogen, and bubbling for 20-30 minutes; step 3, heating to 60-65 DEG C, adding an initiator, slowly adding an acrylic monomer at the same time, and reacting for 4-8 hours to obtain a viscous polymerization product in a suspension form; and 4, continuously heating to 85-90 DEG C, and directly stirring in the reaction kettle to evaporate the solvent to obtain fluffy white powder. No extra alkali needs to be added for pre-dispersion and neutralization, the product can be directly and rapidly dispersed and swelled in a formula system, and the pH value is stable; the method can also be widely applied to the fields of daily chemicals, medicines, foods, printing, coatings and the like, is simple to operate, stable in process, high in product quality and good in performance, and has huge application prospects and market economic benefits.

Description

technical field [0001] The invention relates to the technical field of polymer preparation, in particular to a preparation method of a novel high-efficiency thickener polyacrylate copolymer. Background technique [0002] Polyacrylic acid thickener (carbomer resin) is a high molecular polymer with a certain degree of crosslinking and network structure, and its homopolymer and copolymer form a hydrogel after alkali neutralization, which has good thickening suspension Function, high stability, good transparency and adjustable rheological properties can meet the various needs of consumers. Now it has been widely used in daily chemical, pharmaceutical, food, printing, coating and other fields. [0003] At present, most of the carbomer resins circulating at home and abroad are prepared by precipitation polymerization, that is, in solvents such as dimethylformamide, ethyl acetate, cyclohexane, n-hexane, tert-butanol, methanol, water, etc., adding acrylic acid mono The polyacrylic ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F220/06C08F216/12C08F222/14C08F220/56C08F220/54C08F226/10C08F220/38C08F222/38C08F220/20C08F220/18C08F220/28
Inventor 陈宇梅龙渊
Owner HEFEI ALL PLUS ENVIRONMENTAL TECH CO LTD