(meth) acrylic acid type polymer and unsaturated polyalkylene glycol type copolymer, and methods for production thereof

A technology based on polyalkylene glycol and acrylic acid, which is applied in the field of detergents and unsaturated polyalkylene glycol copolymers, and can solve the problems of poor compatibility between polymers and liquid detergents, insufficient color tone and productivity, etc.

Inactive Publication Date: 2009-12-02
NIPPON SHOKUBAI CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0035] The unsaturated polyalkylene glycol-type copolymer disclosed in JP-A-2002-60785 is indeed excellent in compatibility and dispersibility with liquid detergents, but it also reveals shortcomings in color tone and productivity
Meanwhile, the polymer disclosed in JP-A-11-315115 has poor compatibility with liquid detergents

Method used

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  • (meth) acrylic acid type polymer and unsaturated polyalkylene glycol type copolymer, and methods for production thereof
  • (meth) acrylic acid type polymer and unsaturated polyalkylene glycol type copolymer, and methods for production thereof
  • (meth) acrylic acid type polymer and unsaturated polyalkylene glycol type copolymer, and methods for production thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0286] 156.5 g of pure water (the first charge) was placed in a separable flask with a capacity of 2.5 liters made of SUS and equipped with a reflux condenser and a stirrer, and heated to 90° C. under stirring.

[0287] Then, in the constant stirring polymerization reaction system at a temperature of about 90° C., 427.5 g (4.75 mol) of 80% acrylic acid aqueous solution (hereinafter referred to as “80% AA”) was added dropwise through separate drip nozzles. , 63.5g (0.25mol) 37% sodium acrylate aqueous solution (hereinafter abbreviated as "37%SA"), 66.7g (2.0g / mol, reduced to relative to the amount of monomer added (wherein, in this term "the added monomer Volume" refers to the total amount of all added monomers; hereinafter, its meaning is similar)) 15% sodium persulfate aqueous solution (hereinafter referred to as "15% NaPS"), and 71.4g (5.0g / mol, reduced to relative 35% sodium bisulfite aqueous solution (hereinafter referred to as "35% SBS"). The time for the dropwise additi...

Embodiment 2-14

[0291] The polymkeric substance of described embodiment obtains by embodiment 1 steps. The conditions for these polymers are summarized in Tables 1 and 2 below.

[0292] The polymers (2)-(14) thus obtained were measured for their molecular weight, S value, R value, Q value, iron ion concentration, calcium binding ability, gas amount, and precipitation amount at low temperature. The results are shown in Table 11.

[0293] Table 1

[0294]

[0295] Table 2

[0296]

Embodiment 15-17

[0298] The polymkeric substance of described embodiment is obtained by embodiment 1 step, adds 7.1g (0.5g / mol, reduction to 35% SBS relative to the amount of polymer added). The conditions for these polymers are summarized in Table 3 below.

[0299] The polymers (15)-(17) thus obtained were each measured for molecular weight, S value, R value, Q value, iron ion concentration, calcium binding ability, gas amount, and precipitation amount at low temperature. The results are shown in Table 11.

[0300] table 3

[0301]

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Abstract

This invention concerns a (meth)acrylic acid type polymer, wherein the value S representing the quantity of an sulfur element introduced which is defined by the formula, S = (quantity of S contained in polymer) / (total quantity of S) x 100, is not less than 35. This (meth)acrylic acid type polymer is a water-soluble polymer of a low molecular weight which has only a small impurity content, entails no precipitation of an impurity during the preservation at a low temperature, and excels in dispersibility, chelating ability, and an anti-gelling property.

Description

[0001] This application is a divisional application of an invention patent application. The application date of the parent application is October 3, 2002, the application number is 02154505.7, and the invention name is "(meth)acrylic polymer and unsaturated polyalkylene Glycol type copolymer and its production method". technical field [0002] The present invention relates to (meth)acrylic polymers which can be advantageously used in applications such as water-based dispersants, detergents, and detergent builders, a process for their production, and methods using the polymers detergent. [0003] The present invention also relates to unsaturated polyalkylene glycol-type copolymers which can be advantageously used in applications such as water-based dispersants, detergents, cement additives and detergent builders, a process for their production, and Detergent using this polymer. Background technique [0004] [Prior art concerning (meth)acrylic polymers] [0005] Water-solub...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F220/06C11D3/37
Inventor 米田淳郎津守隆弘藤井义一山口繁
Owner NIPPON SHOKUBAI CO LTD
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