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Water-soluble thickener and liquid acidic detergent

A technology of water-soluble thickeners and water-soluble copolymers, which is applied in the direction of inorganic non-surface active detergent compositions, organic non-surface active detergent compositions, and other chemical processes, and can solve unsatisfactory thickening effects and difficult Problems such as complete control of reaction, thickening effect of thickener, or insufficient stability over time

Active Publication Date: 2005-11-30
TOAGOSEI CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, their thickening effect is unsatisfactory under strongly acidic conditions, for example, containing about 10% by weight of hydrochloric acid and having a pH of 1 or less
[0006] In addition, in the process of preparing copolymers using crosslinkable monomers as described in JP-A-9-157130, JP-A-2001-114642, JP-A-2001-115135, etc., there are problems such as In order to obtain a high-molecular-weight water-soluble polymer with a weight-average molecular weight exceeding 5,000,000, it is difficult to completely control the reaction, so a water-insoluble polymer with a molecular structure in the form of a three-dimensional network may be produced
[0007] Thus, conventional thickeners are not sufficient in thickening effect or stability over time in an aqueous solution exhibiting strong acidity.
In order to improve the thickening effect of the detergent, improvements such as increasing the amount of thickener added can be considered, but this will lead to a decrease in the fluidity of the liquid acidic detergent and make it difficult for the detergent to flow from the nozzle in the detergent container. outflow, resulting in poor sense of use
In addition, the detergent produced also contains a large amount of organic matter, which is not preferable from an environmental point of view
And, on the other hand, when the fluidity of the acidic detergent is improved by adjusting the amount of the thickener added, there is a problem that the detergent does not have sufficient anti-dripping performance on ceramic surfaces and the like

Method used

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  • Water-soluble thickener and liquid acidic detergent
  • Water-soluble thickener and liquid acidic detergent
  • Water-soluble thickener and liquid acidic detergent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0077] 645.9 (equivalent to 50 mol%) of 50% by weight of 2-acrylamido-2-methylpropanesulfonate aqueous solution, 184.1g (equivalent to 25% by mol) of 36% by weight of sodium acrylate aqueous solution, 50.8 g (equivalent to 25 mol%) of acrylic acid and 119.2 g of pure water were mixed to prepare 1 kg of an aqueous monomer solution having a monomer concentration of 44% by weight. The monomer aqueous solution was placed in a stainless steel Dewar vacuum flask, and the temperature in the reaction vessel was cooled to 5° C., and nitrogen gas was bubbled for 30 minutes. Then, 10 ppm (based on the total weight conversion of the monomer, the same below) of tert-butyl hydroperoxide, 200 ppm of sodium persulfate and 20 ppm of sodium erythorbate were added as polymerization initiators, and the reaction mixture was left to stand 8 hours for adiabatic static redox polymerization. After the 8-hour reaction was completed, the thus-produced hydrogel-like polymer was taken out of the reaction...

Embodiment 2

[0079] 916.8g (corresponding to 80 mol%) of 50% by weight of 2-acrylamido-2-methylpropanesulfonate aqueous solution, 65.2g (corresponding to 10 mol%) of 36% by weight of sodium acrylate aqueous solution, 18.0 g (corresponding to 10 mol%) of acrylic acid was mixed to prepare 1 kg of an aqueous monomer solution having a monomer concentration of 50% by weight. This monomer aqueous solution was placed in a stainless steel Dewar vacuum flask, and the temperature in the reaction vessel was cooled to 10° C., and nitrogen gas was bubbled for 30 minutes. Then, 30 ppm of t-butyl hydroperoxide, 200 ppm of sodium persulfate and 20 ppm of sodium erythorbate were added thereto as polymerization initiators. Carry out remaining steps in the same manner as in Example 1 to obtain the desired polymer in powder form. This polymer is designated A2.

Embodiment 3

[0081]419.4 g (corresponding to 30 mol %) of 50% by weight of 2-acrylamido-2-methylpropanesulfonate aqueous solution, 159.3 g (corresponding to 30 mol %), and 159.3 g (corresponding to 20 mole %) of 36% by weight of sodium acrylate aqueous solution, 107.7g (corresponding to 49 mole %) of acrylic acid, 5.3g (corresponding to 1 mole %) of acrylic acid dimer (product name "Aronix M-5600"; East Asia Co., Ltd.) and 308.3 g of pure water were mixed to prepare 1 kg of an aqueous monomer solution having a monomer concentration of 38% by weight. The temperature in the reaction vessel was cooled to 10°C and sparged with nitrogen for 30 minutes. Then, 30ppm (based on the conversion of the total weight of the monomer, the same below) of tert-butyl hydroperoxide, 200ppm of sodium persulfate and 20ppm of sodium erythorbate as a polymerization initiator was added thereto, and the reaction mixture was left to stand 8 hours for adiabatic static redox polymerization. After the 8-hour reaction...

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PUM

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Abstract

A water-soluble thickener which is highly effective even in thickening strongly acidic aqueous solutions and has excellent stability in such solutions. It comprises a water-soluble copolymer having a weight-average molecular weight of 6,000,000 or higher obtainable by polymerizing a monomer mixture which comprises 2-acrylamido-2-methylpropanesulfonic acid and / or a salt thereof and acrylic acid and / or a salt thereof as essential components and optionally one or more other copolymerizable monomer components including the compound represented by the following Formula (1) and / or a salt thereof, wherein the 2-acrylamido-2-methylpropanesulfonic acid and / or a salt thereof represents 20 mol% or more of all the monomers. (wherein n is an integer of 1 to 12).

Description

technical field [0001] The present invention relates to a thickener having a thickening effect and stability even in a solution showing strong acidity, and to a liquid-like acidic detergent composed of the thickener, which can be generally used in related art field. Background technique [0002] For detergents used to remove stains on ceramic products such as bathroom tiles, washstands, toilet bowls, interior decorative tiles, etc., acidic detergents including hydrochloric acid, citric acid, etc. detergent or chlorine-based detergents. Generally, for such detergents, water-soluble thickeners that work effectively when mixed into a liquid detergent to properly adjust its viscosity are generally researched so that when the adhesive is applied to tiles or vertical surfaces of toilet bowls, Liquid detergent drips slowly over the wash surface. [0003] For example, in a liquid acid detergent for washing tiles in which sulfamic acid and glycolic acid are used in combination as ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K3/00
Inventor 伊藤贤司森嘉男
Owner TOAGOSEI CO LTD
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