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Polycarboxylic acid copolymer, production method and use thereof

A technology of polycarboxylic acid and copolymer, which is applied in the field of polycarboxylic acid copolymer and its preparation and application, and can solve problems such as high viscosity and difficult digging work

Inactive Publication Date: 2006-07-26
NIPPON SHOKUBAI CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] However, the water-soluble amphoteric copolymers prepared by copolymerizing Compound A, Compound B, and Compound C in all the examples of this publication, when used to prepare high-strength concrete, make them relatively high in viscosity, digging soil Work becomes difficult, therefore, they have problems with construction

Method used

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  • Polycarboxylic acid copolymer, production method and use thereof
  • Polycarboxylic acid copolymer, production method and use thereof
  • Polycarboxylic acid copolymer, production method and use thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0366] In a glass reaction apparatus equipped with a thermometer, stirrer, dropping device, nitrogen inlet tube, and reflux condenser, charge 500 parts of polyethyleneimine-ethylene oxide adduct (by adding 3 moles (average) ring The compound obtained by adding ethylene oxide to the active hydrogen atom of polyethyleneimine with a Mw of 600), purging the interior of the reaction device with nitrogen while stirring, and cooling the material to 20° C. or below in a nitrogen atmosphere. While the reaction system was kept at 20°C or below, 44.3 parts of glycidyl methacrylate was added within 1 hour. After the addition was complete, stirring was continued at 20° C. or below for 1 hour to obtain a polyethyleneimine-ethylene oxide adduct monomer (polyethyleneimine-EO adduct macromonomer).

Embodiment 2

[0368] In a glass reaction apparatus equipped with a thermometer, stirrer, dropping device, nitrogen inlet tube, and reflux condenser, charge 500 parts of polyethyleneimine-ethylene oxide adduct (by adding 3 moles (average) ring The compound obtained by adding ethylene oxide to the active hydrogen atom of polyethyleneimine with a Mw of 600), purging the interior of the reaction device with nitrogen while stirring, and cooling the material to 20° C. or below in a nitrogen atmosphere. While the reaction system was kept at 20°C or below, 51.2 parts of methacrylic anhydride was added within 1 hour. After the addition was complete, stirring was continued at 20° C. or below for 1 hour to obtain a polyethyleneimine-ethylene oxide adduct monomer (polyethyleneimine-EO adduct macromonomer).

Embodiment 3

[0370] In a glass reaction device equipped with a thermometer, a stirrer, a dripping device, a nitrogen gas inlet tube and a reflux condenser, put 984.3 parts of water, and while stirring, purge the inside of the reaction device with nitrogen, and heat the material in a nitrogen atmosphere to 80°C. Added dropwise within 2 hours the poly(ethylene glycol) monomethacrylate containing 625.5 parts of methoxypolyethylene glycol (the average addition mole number of ethylene oxide: 25), 166.0 parts of methacrylic acid, and 208.5 parts of the polymer synthesized in Example 1. Ethyleneimine-EO adduct macromer, 250.0 parts of water and 15.7 parts of monomer aqueous solution of 3-mercaptopropionic acid as chain transfer agent and 200.0 parts of 10.4% ammonium persulfate aqueous solution make the aqueous solution of mixed monomer ( 503.5 grams). After completion of the dropwise addition, 50.0 parts of a 10.4% ammonium persulfate aqueous solution was further added dropwise within 0.5 hours...

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Abstract

Disclosed is polybasic carboxylic acid copolymer, a preparation method thereof, and filler for cement and cement compound, which contain the polybasic carboxylic acid copolymer. The polybasic carboxylic acid copolymer is characterized in that the polybasic carboxylic acid copolymer is prepared with the monomer component which contains unsaturated polymerize alkylene imine monomer(AI)and carboxylic monomer(B). The polybasic carboxylic acid copolymer and the filler for cement can be used to produce cement mixture which is of high water-reducing property and constructability or of the same water-reducing property and fluidity with common mixtures and is convenient to carry. The polybasic carboxylic acid and the filler for cement can also be used to produce hardened products with great intensity and durability and are suitable for producing concrete with super high strength. In certain embodiments, the polybasic carboxylic acid copolymer is of great water-reducing capability and can reduce the viscidity of the cement mixture, thus improving the constructability of the cement during the manufacturing process.

Description

[0001] This application is submitted on December 26, 2001. The national application number is 0182345.6 (the international application number is PCT / JP01 / 11437), and the invention title is "polycarboxylic acid copolymer and its preparation method and application". Divisional application. technical field [0002] The present invention relates to a polycarboxylic acid copolymer, a method for preparing the polycarboxylic acid copolymer, a cement admixture and a cement composition. More particularly, the present invention relates to a polycarboxylic acid copolymer which can be effectively used as a water reducer for ultrahigh-strength concrete, a method for preparing the polycarboxylic acid copolymer, a cement admixture containing the polycarboxylic acid copolymer, and cement combination. Background technique [0003] Polycarboxylic acid copolymers have been used as cement admixture components in cement compositions such as cement pastes, stucco and concrete. They are presentl...

Claims

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Application Information

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IPC IPC(8): C08F290/06C04B24/26C04B28/02
Inventor 汤浅务西川朋孝坂本登枚田健严樫弘子上田富康田中宏道恩田义幸宇野亨
Owner NIPPON SHOKUBAI CO LTD
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