Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

A kind of synthetic method of modified sulfamate water reducer

A technology of sulfamate and synthesis method, which is applied in the field of synthesis of modified sulfamate water reducer, can solve the problems of high raw material price, poor water retention performance, high production cost, etc., to reduce production cost and maintain collapse Excellent performance, the effect of improving water retention performance

Active Publication Date: 2019-08-23
上海宇砼建筑科技股份有限公司
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the many branches, sodium sulfamate molecules are generally adsorbed vertically on the surface of concrete particles. This three-dimensional effect can make concrete maintain its slump and fluidity for a long time; but the molecular chain of the hydrophobic group in the molecule is short, The strong polar structure determines its poor water retention performance and easy bleeding when it is applied to concrete; and there are volatile phenol, formaldehyde and other toxic substances in the raw materials, the raw materials are relatively expensive, and the production cost is high

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

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A kind of synthetic method of modified sulfamate water reducer
  • A kind of synthetic method of modified sulfamate water reducer
  • A kind of synthetic method of modified sulfamate water reducer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] A kind of synthetic method of modified sulfamate water reducer, comprises the steps:

[0020] (1) The weight ratio of raw materials is: sodium p-aminobenzenesulfonate 17.37%; phenol 7.07%; formaldehyde 21.9%; sodium hydroxide 0.26%; urea 1.56%; melamine 14.6%; water 37.24%;

[0021] (2) Methylolation of melamine: put 85g of water, 97.4g of melamine, and 52.5g of formaldehyde into the reaction kettle A, heat up to 60°C, after the melamine is completely dissolved, continue the reaction for 15 minutes and then terminate the reaction;

[0022] (3) Dissolution and neutralization: Weigh 92.5g of water, 115.6g of sodium p-aminobenzenesulfonate, and 47g of phenol into the reactor and stir to raise the temperature to 73°C; weigh 1.5g of sodium hydroxide and dissolve it in 20g of water; dissolve the sodium hydroxide solution Add to the reaction kettle and stir for 15 minutes;

[0023] (4) Hydroxymethylation condensation: Weigh 93.2g formaldehyde solution (the mass fraction of th...

Embodiment 2

[0026] A kind of synthetic method of modified sulfamate water reducer, comprises the steps:

[0027] (1) The weight ratio of raw materials is: 18.9% of sodium p-aminobenzenesulfonate; 9.1% of phenol; 25.3% of formaldehyde; 0.33% of sodium hydroxide; 0.93% of urea; 15.9% of melamine;

[0028] (2) Methylolation of melamine: put 80g of water, 97.4g of melamine, and 52.5g of formaldehyde into the reaction kettle A, heat up to 60°C, after the melamine is completely dissolved, continue the reaction for 15 minutes and then terminate the reaction;

[0029] (3) Dissolving and neutralizing: Weigh 87.5g of water, 115.6g of sodium p-aminobenzenesulfonate, and 67.7g of phenol into the reactor and stir to raise the temperature to 73°C; weigh 1.8g of sodium hydroxide and dissolve it in 10g of water; The solution was added to the reaction kettle and stirred for 15 minutes;

[0030] (4) Hydroxymethylation condensation: Weigh 102.5g formaldehyde solution (the mass fraction of the formaldehyde ...

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 belongs to the field of water reducer for concrete, and particularly relates to a synthetic method of modified sulfamate water reducer. The synthetic method includes steps of 1), melamine hydroxymethylation; 2), dissolution and neutralization, hydroxymethylation condensation; 3), molecular chain rearrangement. The water reducer prepared by the invention is well-adapted to mineral additive (fly ash, mineral powder, silica fume) in the concrete, and able to significantly improve water retention capacity of the sulfamate water reducer and reduce the concrete sensitivity to the water reducer dosage; the water reducer prepared by the invention is excellent in slump retaining performance; the fluidity of net paste of a cementing material is basically free from loss within 4h, and the mortar fluidity is basically free from loss within 4h; the water reducer is applied to prepare commercial concrete and large fluidity concrete, the water reducer has the advantages of being high in water reducing rate and significantly promoting the intensity.

Description

technical field [0001] The invention belongs to the field of water reducers for concrete, and in particular relates to a synthesis method of a modified sulfamate water reducer. Background technique [0002] With the development of concrete technology, concrete admixtures have become an indispensable part and an important part of promoting the development of concrete. One of the most used admixtures in concrete admixtures is concrete water reducer, which is a very important component. High-efficiency water-reducing agents occupy an important position because of their good effects and slump-preserving properties. At present, the most widely used high-efficiency water-reducing agents in China include: Water agent, naphthalene-based superplasticizer, melamine-based superplasticizer and sulfamate-based superplasticizer. [0003] Among them, the sulfamate-based water-reducer is one of the very important non-naphthalene-based water-reducers. Sulfamate-based high-efficiency water...

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 Patents(China)
IPC IPC(8): C04B24/16C08G12/40
Inventor 陈友治卢尧王云
Owner 上海宇砼建筑科技股份有限公司
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com