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

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

Inactive Publication Date: 2007-01-17
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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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 additio...

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] Example

[0294] Example

Embodiment 15-17

[0296] 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.

[0297] 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.

[0298] Example

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PUM

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Abstract

The present invention relates to a (meth)acrylic type polymer, wherein the value of S representing the amount of introduced sulfur element is not less than 35, which is defined by the following formula, S=(the amount of S contained in the polymer) / (the total amount of S)× 100. The (meth)acrylic polymer is a water-soluble polymer with low molecular weight, has only a small impurity content, does not precipitate impurities during low-temperature storage, and has excellent dispersibility, chelating ability, and anti-gelling performance.

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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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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