Polycarboxylate water reducer derived from environmentally friendly and odorless raw materials and its preparation method and application

A technology of polycarboxylate and water reducer, applied in polycarboxylate water reducer derived from environmentally friendly and odorless raw materials and its preparation and application fields, can solve problems such as unbearable odor, achieve convenient operation, good slump retention effect, High water reduction effect

Active Publication Date: 2021-06-04
SHANGHAI DONGDA CHEM
View PDF5 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In recent years, with the country's emphasis on green environmental protection, and the needs of various production companies for energy saving and emission reduction, shortening the production cycle, and improving efficiency, the synthesis of polyacid water reducers by traditional high-temperature reactions has also gradually developed a normal temperature synthesis method, but The conventional small materials used, such as mercaptopropionic acid, mercaptoacetic acid, mercaptoethanol, etc., have a strong sulfide smell, especially in the hot summer, the smell is even more unbearable

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
  • Polycarboxylate water reducer derived from environmentally friendly and odorless raw materials and its preparation method and application
  • Polycarboxylate water reducer derived from environmentally friendly and odorless raw materials and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0063] The present invention also provides a preparation method of the polycarboxylate water reducer quickly synthesized from odorless and environmentally friendly small materials, which comprises the following steps: under stirring conditions, ammonium persulfate is added to the mixture A, and then the solution B is added dropwise , solution C, and solution D, carry out polymerization reaction, after aging for a period of time, adjust the solid content to 30wt% ~ 50wt% with water, which is a polycarboxylate water reducer quickly synthesized from a tasteless and environmentally friendly small material;

[0064] The mixture A is obtained by mixing unsaturated polyether, sodium hypophosphite and water;

[0065] The solution B is obtained by mixing L-ascorbic acid, E51, sodium formaldehyde sulfoxylate and water;

[0066] The solution C is obtained by mixing hydrogen peroxide and water;

[0067] The solution D is obtained by mixing acrylic acid, sodium methacrylate and water.

...

Embodiment 1

[0089] (1) Preparation before polymerization:

[0090] Preparation of mixture A: Weigh 100 parts by weight of methallyl polyoxyethylene ether with a number average molecular weight of 2400, 50 parts by weight of water, and 1.5 parts of sodium hypophosphite, put them into a polymerization reactor, stir evenly, and keep at 25°C ,spare;

[0091] Preparation of solution B: Weigh 1.0 parts by weight of L-ascorbic acid, 0.9 parts by weight of sodium formaldehyde sulfoxylate and 23 parts by weight of water, stir evenly, and prepare dropwise;

[0092] Preparation of solution C: weigh 2.0 parts by weight of hydrogen peroxide and 20 parts by weight of water, stir evenly, and prepare to add dropwise;

[0093] Preparation of solution D: Weigh 24 parts by weight of acrylic acid and 1 part by weight of sodium methacryl sulfonate for dropwise addition;

[0094] (2) Polymerization: In step (1) the polymerization reactor that has been put into mixture A, start stirring, when the temperature ...

Embodiment 2～5

[0098] The preparation methods of Examples 2-5 are the same as those of Example 1, and the differences are specifically marked in Table 1 below.

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

This application relates to a polycarboxylate water reducer derived from environmentally friendly and odorless raw materials, which is made of the following raw materials in parts by weight: 100 parts of unsaturated polyether, 8 to 24 parts of acrylic acid, 1 to 6 Parts of sodium methacrylate, 0.6-3.0 parts of ammonium persulfate, 1.0-2.0 parts of hydrogen peroxide, 0.6-1.0 parts of L-ascorbic acid, 0.2-0.7 parts of E51, 0.3-0.9 parts of sodium formaldehyde sulfoxylate, 1.5-7.5 parts sodium phosphite and 123 to 294 parts of water, the number average molecular weight of the unsaturated polyether is 2000 to 3000, and it is one or more of the following: methallyl polyoxyethylene ether, methyl Enyl butyl polyoxyethylene ether or vinyl glycol ether polyoxyethylene ether. The present application also relates to the preparation method and use method of the polycarboxylate water reducer and its application in construction engineering. The polycarboxylate water reducer of the present application has a simple preparation process, is convenient to operate, has good initial fluidity and good slump retention, and has remarkable economic, social and environmental benefits.

Description

technical field [0001] This application relates to the technical field of building materials, in particular to a polycarboxylate water reducer derived from environmentally friendly and odorless raw materials, a preparation method of the polycarboxylate water reducer derived from environmentally friendly The use method of the polycarboxylate water reducer and the application of the polycarboxylate water reducer derived from environmentally friendly and odorless raw materials in construction projects that require high concrete initial fluidity and slump retention effect. Background technique [0002] Due to its unique comb structure, the polycarboxylate superplasticizer has multiple charged groups on the main chain and hydrophilic active groups on the side chains, thus playing the role of dispersing cement particles. It has the advantages of low dosage, high water reducing rate, and small loss of slump over time. It has become the most widely used concrete water reducing agent...

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): C08F283/06C08F220/06C08F228/02C04B24/16C04B103/30
CPCC04B24/165C04B2103/302C08F283/065C08F220/06
Inventor 翟立杰王宜慧罗琼陈洁刘洪锦
Owner SHANGHAI DONGDA CHEM
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