Unlock instant, AI-driven research and patent intelligence for your innovation.

A kind of high anti-mud type polycarboxylate water reducer and preparation method thereof

A technology of polycarboxylic acid and water reducing agent, applied in the field of building admixtures, can solve problems such as sensitivity to mud content, and achieve the effects of easy operation, good material adaptability and remarkable effect

Active Publication Date: 2019-01-08
ZHEJIANG KZJ NEW MATERIALS CO LTD
View PDF6 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The problem that traditional polycarboxylate superplasticizer products are too sensitive to mud content has gradually been exposed, which has been greatly restricted in practical applications

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 high anti-mud type polycarboxylate water reducer and preparation method thereof
  • A kind of high anti-mud type polycarboxylate water reducer and preparation method thereof
  • A kind of high anti-mud type polycarboxylate water reducer and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Configure the first mixed solution and the second mixed solution respectively, and the ratio is as follows:

[0025] The first mixed solution: acrylic acid (120g)+tripropylene phosphite (15g)+water (350g)

[0026] The second mixed solution: thioglycolic acid (14g)+L~ascorbic acid (2g)+sodium hypophosphite (3g)+water (500)g

[0027] (1) Add 1800g of water to the reaction kettle, raise the temperature to about 65°C, then add 1900g of methallyl polyoxyethylene ether (TPEG) into the reaction kettle, control the temperature to stabilize at 60-65°C, fully stir and dissolve.

[0028] (2) Add 30 g of hydrogen peroxide and 40 g of dimethylaminopropyl acrylamide into the reaction kettle, stir well, and keep warm for 20 minutes.

[0029] (3) Adding the first mixed solution and the second mixed solution dropwise to the reactor respectively, the time for adding the first mixed solution is controlled within 2.5 hours, and the time for adding the second mixed solution is controlled w...

Embodiment 2

[0032] Configure the first mixed solution and the second mixed solution respectively, and the ratio is as follows:

[0033] The first mixed solution: acrylic acid (135g)+tripropylene phosphite (10g)+water (350g)

[0034] The second mixed solution: thioglycolic acid (14g)+L~ascorbic acid (2g)+sodium hypophosphite (3g)+water (500)g

[0035] (1) Add 1800g of water to the reaction kettle, raise the temperature to about 65°C, then add 1900g of methallyl polyoxyethylene ether (TPEG) into the reaction kettle, control the temperature to stabilize at 60-65°C, fully stir and dissolve.

[0036] (2) Add 25g of hydrogen peroxide and 30g of dimethylaminopropylacrylamide into the reaction kettle, stir well, and keep warm for 20min.

[0037] (3) Adding the first mixed solution and the second mixed solution dropwise to the reactor respectively, the time for adding the first mixed solution is controlled within 2.5 hours, and the time for adding the second mixed solution is controlled within 3 ...

Embodiment 3

[0040] Configure the first mixed solution and the second mixed solution respectively, and the ratio is as follows:

[0041] The first mixed solution: acrylic acid (120g)+tripropylene phosphite (15g)+water (350g)

[0042] The second mixed solution: sodium methacrylate (25g) + L ~ ascorbic acid (2g) + sodium formaldehyde sulfoxylate (5g) + water (500) g

[0043] (1) Add 1800g of water to the reaction kettle, raise the temperature to about 65°C, then add 1900g of methallyl polyoxyethylene ether (TPEG) into the reaction kettle, control the temperature to stabilize at 60-65°C, fully stir and dissolve.

[0044] (2) Add 30 g of hydrogen peroxide and 40 g of dimethylaminopropyl acrylamide into the reaction kettle, stir well, and keep warm for 20 minutes.

[0045] (3) Adding the first mixed solution and the second mixed solution dropwise to the reactor respectively, the time for adding the first mixed solution is controlled within 2.5 hours, and the time for adding the second mixed so...

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 high-mud-resistance polycarboxylic acid water reducing agent and a preparation method thereof. The weight average molecular weight is 40000-90000. The high-mud-resistance polycarboxylic acid water reducing agent is prepared by carrying out dissolution, free radical polymerization and neutralization on the following components in parts by weight: 1900-2100 parts of isopentene alcohol polyoxyethylene ether with the molecular weight of 2000-3000,, 110-150 parts of acrylic acid, 10-20 parts of tripropenyl phosphite, 20-50 parts of dimethylaminopropyl acrylamide, 15-40 parts of initiator, 8-30 parts of chain-transfer agent, 2-10 parts of composite reducer, 100-150 parts of liquid caustic soda and 3000-3100 parts of deionized water. When the sandstone material has higher mud content, the high-mud-resistance polycarboxylic acid water reducing agent still has equivalent concrete water reducing rate to the common polycarboxylic acid under the condition of lowering the doping amount in the same experimental environment, has better concrete slump retaining effects, and can enhance the concrete strength by 1-2 levels. The high-mud-resistance polycarboxylic acid water reducing agent has the same effect when being compounded with other polycarboxylic acid water reducing agents.

Description

technical field [0001] The invention belongs to the technical field of building admixtures, and in particular relates to a highly mud-resistant polycarboxylate water reducer and a preparation method thereof. Background technique [0002] Polycarboxylate superplasticizer is an emerging high-performance superplasticizer, which is environmentally friendly and pollution-free. It is currently in a stage of rapid development, and its market share continues to increase year by year. It will also lead the entire superplasticizer industry in the future. However, as the country continues to expand its infrastructure, high-quality sand and gravel materials are gradually decreasing, and sand and gravel materials with high mud content are gradually applied to the concrete industry. The problem that traditional polycarboxylate superplasticizer products are too sensitive to mud content has gradually been exposed, which has been greatly restricted in practical application. Therefore, the p...

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): C08F283/06C08F220/06C08F230/02C08F220/60C08F2/38
CPCC04B2103/302C08F2/38C08F283/065C08F220/06
Inventor 张乐朱巧勇于飞宇曾贤华
Owner ZHEJIANG KZJ NEW MATERIALS CO LTD