Method for preparing novel polycarboxylic acid retarded high-performance water reducer

A polycarboxylic acid, high-performance technology, used in the preparation of new CM-8 polycarboxylic acid retarding high-performance water reducing agent, can solve the problems of insufficient dispersibility, poor fluidity, low strength, etc. Many variables, strong slump retention ability, good dispersion effect

Inactive Publication Date: 2014-06-18
薛成明
View PDF3 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When pumping concrete needs to be transported over long distances or constructed under high temperature conditions, it will inevitably lead to slump loss of freshly mixed concrete, which will affect the quality of concrete engineering
However, the dispersibility of traditional concrete plasticizers is not good enough, resulting in poor slump, low strength, poor fluidity, low durability, etc.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0007] A preparation method of a novel CM-8 polycarboxylic acid retarding high-performance water reducer, comprising a first reaction kettle, a second reaction kettle, and 0.31% to 0.51% of ammonium persulfate and 0.11% to 0.32% of mercaptoethanol A material made of 54% to 60% deionized water is characterized in that 12.5% ​​to 14.5% of methoxypolyethylene glycol and 2.7% to 3.5% of methacrylic acid, add 0.055% to 0.093% phenothiazine to the first reaction kettle after adding the temperature to 75°C, add 0.059% to 0.091% phenothiazine, and then heat up to 85°C to the first reaction kettle Add 0.188% to 0.235% sulfuric acid (98%) to the kettle. After adding 0.188% to 0.235% sulfuric acid (98%), continue to heat up to 125°C and start constant temperature for 5 hours. The constant temperature is controlled at 125±6°C After the constant temperature is completed, the intermediate product of the ester macromonomer containing unsaturated double bonds is obtained, the macromonomer int...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention discloses a method for preparing a novel polycarboxylic acid retarded high-performance water reducer. The novel polycarboxylic acid retarded high-performance water reducer is prepared from a first reaction kettle, a second reaction kettle, methoxy polyethylene glycol, a methacrylic acid, a sulfuric acid (98%), phenothiazine,, hydroxyethyl acrylate, a crylic acid and the like as raw materials by esterification reaction, polymerization reaction and neutral reaction. The preparation method has the characteristics of simple process, good product dispersity, strong slump retention capacity, multiple variable factors of the molecular structure and the like, and is environmental friendly.

Description

technical field [0001] The invention relates to a preparation method of a novel CM-8 polycarboxylic acid retarding high-performance water reducer, in particular to a preparation method of a novel CM-8 polycarboxylate retarding high-performance water reducer. Background technique [0002] At present, with the development of transportation, hydropower, municipal construction and other construction projects, the gradual rise of high-span bridges, high-rise buildings, high-speed railways, expressways, urban rail transit and other engineering constructions have higher and higher requirements for concrete construction performance, and almost all require Use pumpable concrete, and high-efficiency water reducer is the fifth component that is necessary to prepare pumpable concrete. When pumped concrete needs to be transported over long distances or constructed under high temperature conditions, it will inevitably lead to slump loss of freshly mixed concrete, which will affect the qua...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Applications(China)
IPC IPC(8): C08F291/06C08F220/28C08F220/06C08F220/56C04B24/32C04B103/30
Inventor 薛成明
Owner 薛成明
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap