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Efficient builder and preparation method thereof

A kind of builder and high-efficiency technology, which is applied in the direction of detergent composition, detergent compounding agent, chemical equipment and methods, etc., can solve the problems of low conversion rate, influence on builder performance, poor dispersion of polymer products, etc., and achieve Reduce the harm of environmental pollution, improve the anti-redeposition ability, and increase the effect of dispersion retention ability

Inactive Publication Date: 2020-05-01
SHANGHAI DONGSHENG NEW MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The shortcoming of existing synthetic method is: the price of initiator is expensive, and consumption is large; The solvent that adopts is poisonous, and needs to recycle after distillation again, so process complex equipment investment is big, and the time used is long and energy consumption is high, causes cost relatively high. High; without pre-neutralizing acrylic acid, the solution of acrylic acid added dropwise is directly polymerized. This production process has a low conversion rate of monomers, a relatively wide molecular weight and distribution, and the synthesized polymer product has poor dispersibility, which affects auxiliary production. washing performance

Method used

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  • Efficient builder and preparation method thereof
  • Efficient builder and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] A kind of preparation method of efficient builder:

[0027] Partially react 1 mol of acrylic acid and 0.6 mol of neopentyl glycol phosphorus oxychloride to obtain unsaturated monomer I containing phosphate groups, and then add 0.6 mol of 2-amphetamine to the above reaction system for reaction to obtain amide group-containing The unsaturated monomer II, and 3 mol of acrylic acid, under the action of 0.01 mol of sodium persulfate and 0.03 mol of sodium bisulfite, were kept at 70°C for free radical reaction for 3 hours to obtain a polymer with a mass concentration of 30 % to obtain potassium hydroxide solution to adjust the pH to be neutral, add water to obtain a builder solution with a mass concentration of 40%.

[0028] The high-efficiency builder prepared according to the above-mentioned preparation method.

Embodiment 2

[0030] A kind of preparation method of efficient builder:

[0031] Partially react 1.2 mol of butyl acrylate and 0.6 mol of neopentyl glycol phosphorous oxychloride to obtain unsaturated monomer I containing phosphate groups, and then add 0.6 mol of 2-amphetamine to the above reaction system for reaction to obtain The unsaturated monomer II containing amide group, and 3 mol of acrylic acid, under the action of 0.01 mol of ammonium persulfate and 0.03 mol of sodium pyrophosphite, kept at 75°C for free radical reaction for 3.5 hours to obtain a polymer, with a mass concentration of The pH of the 40% sodium hydroxide solution is adjusted to be neutral, and water is added to obtain a builder solution with a mass concentration of 40%.

[0032] The high-efficiency builder prepared according to the above-mentioned preparation method.

Embodiment 3

[0034] A kind of preparation method of efficient builder:

[0035] Partially react 1 mol of acrylic acid and 0.6 mol of neopentyl glycol phosphorus oxychloride to obtain unsaturated monomer I containing phosphate groups, and then add 0.6 mol of 2-amphetamine to the above reaction system for reaction to obtain amide group-containing The unsaturated monomer II, and 3 mol of acrylic acid, under the action of 0.01 mol of potassium persulfate and 0.03 mol of sodium bisulfite, kept at 80 ℃ for free radical reaction for 4 hours to obtain a polymer, with a mass concentration of 30% Liquid ammonia is used to adjust the pH to be neutral, and water is added to obtain a builder solution with a mass concentration of 40%.

[0036] The high-efficiency builder prepared according to the above-mentioned preparation method.

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Abstract

The invention discloses a preparation method of an efficient builder. The method comprises the following steps: (1) preparation of an unsaturated monomer I: reacting neopentyl glycol phosphoryl chloride with an unsaturated carboxylic acid monomer to prepare the unsaturated monomer I containing a phosphate group; (2) preparation of an unsaturated monomer II: adding a 2-amphetamine micromolecular monomer into the unsaturated monomer I prepared in the step (1), and performing reacting with a phosphate group to prepare the unsaturated monomer II containing an amide group; and (3) preparation of abuilder: slowly dropwise adding acrylic acid and an initiator into the unsaturated monomer II prepared in the step (2), carrying out a free radical polymerization reaction to prepare a polymer, addingan alkaline solution to adjust the polymer to be neutral, and adding water to adjust the polymer to obtain the builder solution. The builder prepared by the invention has higher anion charge density,the dispersing capacity of the builder is improved, and the scale inhibition and redeposition resistance of the builder are improved; in addition, along with the prolonging of the washing time, the washing assisting properties such as chelating force and dispersing force are obviously improved.

Description

technical field [0001] The invention relates to the field of detergents, in particular to a high-efficiency builder and a preparation method thereof. Background technique [0002] Polycarboxylate polymers have excellent chelating and dispersing effects, and are widely used in the fields of detergents and water treatment. In the field of washing, they mainly have dispersing effects. As a washing aid, it has the following characteristics: it has an alkaline buffering effect, and even if there is a small amount of acidic substances, the pH of the washing liquid does not change significantly due to the action of the aid, and it still has a strong decontamination effect; it has the ability to make dirt Disperse in water and prevent dirt from reattaching and depositing on fabrics; polycarboxylate polymers have a large number of carboxylate groups on the side chains, so they have strong particle chelating ability and soften hard water ability. In view of the excellent cleaning per...

Claims

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Application Information

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IPC IPC(8): C08F220/06C08F230/02C08F2/04C11D3/37
CPCC08F2/04C08F220/06C11D3/0036C11D3/3784C08F230/02
Inventor 施晓旦王虎金霞朝
Owner SHANGHAI DONGSHENG NEW MATERIALS
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