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Carbomer and preparation method thereof

An acrylic and monomer technology, applied in the field of carbomer and its preparation, can solve the problems of low production efficiency, limited swelling conditions, long wetting time and the like

Active Publication Date: 2022-03-25
湖北新德晟材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore extremely long wetting times lead to lower production efficiency of further products and swelling conditions limit the use of traditional carbomers

Method used

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  • Carbomer and preparation method thereof
  • Carbomer and preparation method thereof
  • Carbomer and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] A kind of carbomer, its raw material formula composition is as table 1:

[0032] Table 1

[0033] raw material Dosage (parts by mass) acrylic acid 100 Acrylamide 5.0 Hydroxyethyl Acrylate 2.0 Benzoyl peroxide 0.6 Triallyl cyanurate 0.6 Hypermer B246 0.4 Propyl formate 429 n-Hexane 571

[0034] The method steps for preparing carbomer by adopting the raw material combination of the carbomer are:

[0035] (1) Weigh the mixed solvent at 1 g per part by mass, mix it evenly, add it to the reaction kettle, turn on the electric stirring, and heat the reaction kettle to 80-85°C and keep it warm;

[0036] (2) After mixing the mixed monomer (acrylic acid monomer, acrylamide, hydroxyethyl acrylate), crosslinking agent, initiator and stabilizer evenly, to obtain solution A, the reactor is provided with a high-level tank, and the high-level tank Add solution A to the reactor, add solution A dropwise to the reactor, and ...

Embodiment 2

[0042] A kind of carbomer, its raw material formula composition is as table 2:

[0043] Table 2

[0044] raw material Dosage (parts by mass) acrylic acid 100 Acrylamide 5.0 Hydroxyethyl Acrylate 2.0 Benzoyl peroxide 0.6 Allyl Sucrose Ether 0.6 Hypermer B246 0.4 Propyl formate 429 n-Hexane 571

[0045] The method steps of preparing the carbomer by using the raw material combination of the carbomer are the same as in Example 1.

[0046] The prepared carbomer is formulated into a 0.5% carbomer aqueous solution with a mass fraction of 0.5%, and the wetting time is 189s, and then the pH value of the 0.5% carbomer aqueous solution is adjusted to 6.8-7.5 with a 15% mass fraction of NaOH solution, The measured viscosity is 5500mPa·s.

[0047] Weigh 1.0 g of the carbomer prepared in this example and add it to 200.0 g of 80v / v% ethanol aqueous solution to observe the swelling of the carbomer. After 6 hours, it was found that...

Embodiment 3

[0049] A kind of carbomer, its raw material formula composition is as table 3:

[0050] table 3

[0051]

[0052]

[0053] The method steps of preparing the carbomer by using the raw material combination of the carbomer are the same as in Example 1.

[0054] The prepared carbomer is formulated into a 0.5% carbomer aqueous solution with a mass fraction of 0.5%, and the wetting time is 152s, and then the pH value of the 0.5% carbomer aqueous solution is adjusted to 6.8-7.5 with a 15% mass fraction of NaOH solution, The measured viscosity is 25000mPa·s.

[0055] Weigh 1.0 g of the carbomer prepared in this example and add it to 200.0 g of 80v / v% ethanol aqueous solution to observe the swelling of the carbomer. After 6 hours, it was found that all the carbomer swelled.

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Abstract

The invention relates to the technical field of thickeners, in particular to carbomer and a preparation method thereof. The carbomer disclosed by the invention is prepared from the following raw materials in parts by mass: 100 parts of an acrylic monomer, 5.0 to 8.0 parts of acrylamide, 0.5 to 2.0 parts of hydroxyethyl acrylate, 0.4 to 0.6 part of an initiator, 0.6 to 1.4 parts of a cross-linking agent, 0.4 to 1.0 part of a stabilizer and 800 to 1000 parts of a mixed solvent. The method specifically comprises the following steps: uniformly mixing a mixed solvent, adding the mixed solvent into a reaction kettle, starting stirring, and heating to 80-85 DEG C; uniformly mixing the mixed monomer, the cross-linking agent, the initiator and the stabilizer, and adding the mixture into the reaction kettle for 2-2.5 hours; continuously keeping the temperature and reacting for 3-5 hours after dropwise adding; and filtering, washing and drying the obtained product to obtain the product. The prepared carbomer is prepared into an aqueous solution with the mass fraction of 0.5%, the wetting time is only 55-178 s, after the pH value is adjusted to 6.8-7.5 through a NaOH solution with the mass fraction of 15%, the viscosity is 5000-80000 mPa.s, and the carbomer can swell in an ethanol aqueous solution with the volume fraction of 80%.

Description

technical field [0001] The invention relates to the technical field of thickeners, in particular to a carbomer and a preparation method thereof. Background technique [0002] Carbomer is an important polymer thickener. It is a homopolymer or copolymer polymer with acrylic acid or acrylate as a monomer. It uses allyl sucrose ether or pentaerythritol allyl ether as a crosslinking agent. aggregated. Its appearance is white loose powder, and its molecular structure contains 52-68% of acid groups, so it has a certain acidity, has hydrophilic properties, and is soluble in water, glycerin and ethanol, etc. [0003] There are two main thickening principles of carbomer, which are neutralization thickening and hydrogen bond thickening. Neutralization and thickening refers to the carbomer after alkaline neutralization, its carboxyl group is ionized, and due to the mutual repulsion of negative charges, the curled up molecular chains are stretched in a greatly expanded state, increasin...

Claims

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Application Information

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IPC IPC(8): C08F220/06C08F220/56C08F220/20C08F216/12C08F222/14C08F2/06
CPCC08F220/06C08F2/06C08F220/56C08F220/20C08F216/125C08F222/103
Inventor 王中喜王安琪肖磊
Owner 湖北新德晟材料科技有限公司
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