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Copolymer thickener and preparation method thereof

A technology of thickener and copolymer, which is applied in the field of copolymer thickener and its preparation, can solve the problems of less lift-up, doubling of dispersion time, water loss and viscosity, etc., so as to improve skin affinity and resist coagulation The glue loses water and resists the effect of viscosity reduction

Inactive Publication Date: 2017-06-20
GUANGZHOU TINCI MATERIALS TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This solution can provide better film-forming performance, but the problem is that it is difficult to disperse the resin in water. It is necessary to add part of the neutralizer to the water first, and then slowly sprinkle the polymer while stirring. It takes 60 minutes to disperse. , if the polymer is "poured", the dispersion time is doubled
And it cannot form a relatively stable salt-resistant cross-linked structure, which will cause the gel to lose water and reduce viscosity after contact with the skin
[0009] In addition, traditional acrylic thickeners show that the gel is not easy to be twisted, has a small amount of lift-up, and lacks film-forming and firmness after application.

Method used

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  • Copolymer thickener and preparation method thereof
  • Copolymer thickener and preparation method thereof
  • Copolymer thickener and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] Take by weighing 3g N-lauryl acrylamide, 25g N-vinylpyrrolidone, 2.9g polyoxyethylene 30 dipolyhydroxystearate, 2.8g pentaerythritol triallyl ether, 0.5g peroxydicarbonate di( 3-methoxybutyl ester), above-mentioned raw material is dissolved in 65.8g acrylic acid and is mixed with raw material solution stand-by. Add 283.3g of cyclohexane and 283.4g of ethyl acetate into a 1000ml flask, pass nitrogen to remove oxygen under stirring, and raise the temperature to 50°C. Add the above-mentioned raw material solution dropwise to the flask for 3 hours. During the process, the solution becomes turbid, white precipitates are formed, and the viscosity of the system rises. Change the stirring speed in time to maintain a good stirring effect. After the dropwise addition, the temperature was raised to 60° C. for 2 h.

[0041] The polymer suspension was transferred to a one-necked flask, and the solvent was removed by vacuum rotary evaporation at 90-100°C to obtain a fine white copo...

Embodiment 2

[0043] Weigh 6g N-tert-butylacrylamide, 13g N-vinylpyrrolidone, 2.4g Span-80, 0.8g pentaerythritol triallyl ether, 0.3g sucrose allyl ether, 0.4g peroxydicarbonate di( 3-methoxybutyl ester), above-mentioned raw material is dissolved in 77.1g acrylic acid and is mixed with raw material solution stand-by. Add 501.9g of cyclohexane and 167.3g of butyl acetate into a 1000ml flask, pass nitrogen to remove oxygen under stirring, and raise the temperature to 45°C. Add the above-mentioned raw material solution dropwise to the flask for 3 hours. During the process, the solution becomes turbid, white precipitates are formed, and the viscosity of the system rises. Change the stirring speed in time to maintain a good stirring effect. After the dropwise addition, the temperature was raised to 60° C. for 2 h.

[0044] The polymer suspension was transferred to a one-necked flask, and the solvent was removed by vacuum rotary evaporation at 90-100°C to obtain a fine white copolymer thickener...

Embodiment 3

[0046] Weigh 5g N-tert-octyl acrylamide, 4g N-vinylpyrrolidone, 2g polyoxyethylene 30 dipolyhydroxystearate, 2.1g pentaerythritol triallyl ether, 0.3g peroxydicarbonate di(3- methoxybutyl ester), above-mentioned raw material is dissolved in 86.6g acrylic acid and is mixed with raw material solution stand-by. Add 160g of cyclohexane and 240g of ethyl acetate into a 1000ml flask, pass nitrogen to remove oxygen under stirring, and raise the temperature to 55°C. Add the above-mentioned raw material solution dropwise to the flask for 3 hours. During the process, the solution becomes turbid, white precipitates are formed, and the viscosity of the system rises. Change the stirring speed in time to maintain a good stirring effect. After the dropwise addition, the temperature was raised to 60° C. for 2 h.

[0047] The polymer suspension was transferred to a one-necked flask, and the solvent was removed by vacuum rotary evaporation at 90-100°C to obtain a fine white copolymer thickene...

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Abstract

The invention belongs to the field of thickeners, and discloses a copolymer thickener. The copolymer thickener is a poly(alpha,beta-unsaturated carboxylic acid / N-alkyl acrylamide / N-vinyl pyrrolidone) crosslinking copolymer; the mass ratio of N-alkyl acrylamide to alpha,beta-unsaturated carboxylic acid to N-vinyl pyrrolidone is (3 to 18):(65 to 87):(4 to 25). The copolymer thickener has the advantages that the copolymer thickener is easily dispersed into water; a hydrogel has proper elasticity and ductility, the sticking is easy, and the skin smoothness and tightness effects are both realized. The invention also provides a preparation method of the thickener.

Description

technical field [0001] The invention relates to the field of thickeners, in particular to a copolymer thickener and a preparation method thereof. Background technique [0002] In the field of thickeners, unsaturated carboxylic acid polymers have good thickening properties, improve the thixotropic properties and stability of the gel system, and are widely used in the fields of daily cosmetics, medicine and oil exploration. Polycarboxylic acid thickeners usually refer to polymers obtained by moderate crosslinking of monomers such as acrylic acid or methacrylic acid, and their preparation methods are mostly precipitation polymerization. [0003] Patent CN200880101748.3 discloses an associative thickener dispersion, which is obtained by aqueous solution polymerization at 75°C using methacrylic acid, ethyl acrylate and nonionic ethylenically unsaturated surfactant monomers as raw materials An associative thickener dispersion. [0004] Patent US54689797 discloses a copolymer of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F220/06C08F220/54C08F226/10C08F216/14C08F2/00
CPCC08F220/06C08F2/00C08F220/54C08F226/10C08F216/14
Inventor 户献雷麦景璋李琳李泓淼佟锐
Owner GUANGZHOU TINCI MATERIALS TECH
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