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Acrylamide crosslinking copolymer emulsion and preparation method thereof

A technology of cross-linked copolymer and acrylamide, which is used in pharmaceutical formulations, cosmetic preparations, cosmetic preparations, etc., can solve the problems of poor salt resistance of inverse emulsions, limited use, slow inversion speed, etc., and achieve residual The effect of low monomer content, good reversal speed and salt tolerance

Active Publication Date: 2007-02-07
GUANGZHOU TINCI MATERIALS TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] The thickening performance of the acrylamide and sodium acrylate cross-linked copolymer emulsion thickener synthesized by inverse emulsion polymerization has a strong pH-dependent type, and generally requires the pH of the thickened system to be above 6. EP 0503853 describes A cross-linked copolymer of acrylamide and 2-acrylamide-2-methylpropanesulfonic acid obtained by inverse emulsion polymerization, the thickener has a wide range of pH values ​​(pH value = 4-12) Good thickening ability, but the salt resistance of the inverse emulsion prepared by this patent is poor and the inversion speed is slow, which limits its use in some cosmetic formulations. At the same time, the patent does not propose The elimination scheme of residual monomers of acrylamide, and there is no necessary restriction on the use of oil phase

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] A. Containing 44% of acrylamide cross-linked copolymer;

[0038] B. Contains isoparaffins, or 18% silicone oil;

[0039] C. Contains 1.6% of water-in-oil emulsifier;

[0040] D. Contains 2.5% of oil-in-water emulsifier;

[0041] E, the rest is water.

Embodiment 2

[0043] A. Containing 35% of acrylamide cross-linked copolymer;

[0044] B. Contains isoparaffin or 30% silicone oil;

[0045] C. Contains 3.5% of water-in-oil emulsifier;

[0046] D. Contains 5% of oil-in-water emulsifier;

[0047] E, the rest is water.

Embodiment 3

[0049] A. Contains 39.5% of acrylamide cross-linked copolymer;

[0050] B. Contains isoparaffins, or 24% silicone oil;

[0051] C. Contains 2.55% of water-in-oil emulsifier;

[0052] D. Contains 3.75% of oil-in-water emulsifier;

[0053] E, the rest is water.

[0054] The preparation method of acrylamide cross-linked copolymer emulsion:

[0055] Example 1

[0056] A, add 316g water in the 2000ml beaker that is equipped with magnetic stirring bar, under stirring state, add the comonomer 155g acrylamide and 453g 2-acrylamido-2-methylpropanesulfonic acid successively, stir to dissolve, Add 0.16g of N'N-methylenebisacrylamide as a cross-linking monomer and 0.45g of pentasodium ethylene triamine pentaacetic acid as a chelating agent, stir to dissolve, and then use alkaline additive 45 % NaOH aqueous solution about 218g to adjust the pH value of the above solution to 7.0±0.2.

[0057] B. Add 354.0 g of isohexadecane in the oil phase into a 2000 ml beaker equipped with a magnet...

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Abstract

the invention discloses a acrylamide crosslinking copolymer emulsion with 35-44% acrylamide crosslinking copolymer and water and preparing method in the reversed phase emulsion-typed macromolecular thickener of cosmetic, drug and ink industry, which comprises the following steps: blending acrylamide and 2-acrylamide-2-methanesulfonic acid; adding adjuvant to mix with oil phase; adding emulsifier of water-in-oil type and adjuvant emulsion; adding emulsifier of the oil-in-water type to obtain the product.

Description

technical field [0001] The invention relates to an inverse emulsion type polymer thickener and a preparation method thereof, and is especially suitable for the industries of cosmetics, pharmacy and printing ink. Background technique [0002] There are two main types of polymer thickeners, one is natural polymers or their modified products, and the other is synthetic polymers. Natural polymers (such as gum arabic, guar gum and starch) have the disadvantages of unstable performance and short shelf life, while synthetic polymers can completely overcome the above disadvantages, and at the same time have the advantages of less dosage, high efficiency, low toxicity, and storage resistance. , non-deteriorating advantages, in recent years, many research institutions and research institutes have begun to engage in related research. [0003] In our country, the research and application of polymer thickeners are mainly concentrated in the fields of oil exploration and textile printing...

Claims

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Application Information

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IPC IPC(8): C08F265/10C08F2/32C08K5/20C09D11/02A61K31/78A61K8/81A61Q1/00C09D11/00
Inventor 王飞张若昕袁立新金永红岑华杰
Owner GUANGZHOU TINCI MATERIALS TECH
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