Anti-mud slump-loss-resistant multifunctional unsaturated monomer for production of polycarboxylate slump-loss-resistant mother liquor

A technology of unsaturated polycarboxylic acid, which is applied in the field of slump-preserving, slow-release unsaturated functional monomers, and anti-sludge, which can solve the problems of high preparation cost and limited effect of anti-sludge anti-slump, and achieves quick results and is not easy to segregate , reduce the effect of grasping the bottom

Active Publication Date: 2019-04-16
YANTAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0016] However, the above-mentioned preparation method has the defects of relatively high preparation cost and limited anti-sludge effect.

Method used

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  • Anti-mud slump-loss-resistant multifunctional unsaturated monomer for production of polycarboxylate slump-loss-resistant mother liquor
  • Anti-mud slump-loss-resistant multifunctional unsaturated monomer for production of polycarboxylate slump-loss-resistant mother liquor
  • Anti-mud slump-loss-resistant multifunctional unsaturated monomer for production of polycarboxylate slump-loss-resistant mother liquor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0061] 1. Synthesis of anti-mud functional monomer 1:

[0062] (1) Add 738 grams of polyols (sorbitol: ethylene glycol: polyethylene glycol 200: polyethylene glycol 1000 = 20:50:10:20) into a three-necked flask, start heating in an oil bath and Stir.

[0063] (2) Heat up to 40°C, add 0.7 g of polymerization inhibitor (phenothiazine: p-benzoquinone = 60:40), and stir for 5 minutes.

[0064] (3) Heat up to 60°C, add 252.3 g of unsaturated carboxylic acid (acrylic acid: methacrylic acid = 60:40).

[0065] (4) After heating up to 75°C, add 9 grams of catalyst (concentrated hydrochloric acid: p-toluenesulfonic acid = 30:70).

[0066] (5) Heat up to 110°C and keep warm for 2.5 hours.

[0067] (6) Cool to below 60°C and discharge to obtain anti-sludge functional monomer 1.

[0068] This mud-resistant functional monomer 1 is used for the synthesis of the following slump-preserving mother liquor 1.

[0069] 2. Synthesis of Baosteel Mother Solution 1:

[0070] (1) Add 365 grams of...

Embodiment 2

[0082] 1. Synthesis of anti-mud functional monomer 1:

[0083] Consistent with that described in Example 1. This mud-resistant functional monomer 1 is also used in the synthesis of the following slump-preserving mother liquor 2.

[0084] 2. Synthesis of slump-proof mother liquor 2:

[0085] (1) Add 365 grams of isobutenol polyoxyethylene ether and 350 grams of deionized water into a three-necked flask, and stir at room temperature for 20 minutes to ensure that the isobutenol polyoxyethylene ether is completely dissolved.

[0086] (2) Add 5 grams of hydrogen peroxide and stir for 5 minutes.

[0087] (3) Prepare liquid A and liquid B. Solution A: 1.6 grams of mercaptopropionic acid, 1.4 grams of vitamin C (VC), 82 grams of deionized water. Solution B: 25 grams of acrylic acid, 40 grams of anti-mud functional monomer 1, 23 grams of deionized water. Both liquid A and liquid B are added dropwise into the three-necked flask, wherein liquid A is added dropwise for 3.5 hours, and...

Embodiment 3

[0093]1. Synthesis of anti-mud functional monomer 2:

[0094] (1) Add 613 grams of polyols (sorbitol: ethylene glycol: polyethylene glycol 600: polyethylene glycol 1500 = 30:30:20:20) into a three-necked flask, start heating in an oil bath and to stir;

[0095] (2) Heat up to 50°C, add 1 g of polymerization inhibitor (2-tert-butylhydroquinone: hydroquinone: p-benzoquinone = 30:20:50), and stir for 5 minutes;

[0096] (3) Heat up to 65°C, add 378 grams of unsaturated carboxylic acid (acrylic acid: methacrylic acid = 30:70);

[0097] (4) After heating up to 80°C, add 8 grams of catalyst (concentrated sulfuric acid: p-toluenesulfonic acid = 40:60);

[0098] (5) Heat up to 135°C and keep warm for 3 hours;

[0099] (6) Cool to below 60°C and discharge to obtain mud-resistant functional monomer 2.

[0100] This mud-resistant functional monomer 2 is used for the synthesis of the following slump-preserving mother liquor 3.

[0101] 2. Synthesis of slump-proof mother liquor 3:

...

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Abstract

The invention relates to an anti-mud slump-loss-resistant multifunctional unsaturated monomer for production of a polycarboxylate slump-loss-resistant mother liquor, in particular to an unsaturated functional monomer with the functions of mud prevention, slump loss resistance, sustained release and the like. The monomer is characterized in that common chemical raw materials or chemical reagents are selected, and the unsaturated monomer is prepared through a reaction at a certain temperature. The unsaturated functional monomer can effectively improve the mud prevention, slump loss resistance and sustained release performance of a polycarboxylate superplasticizer and the workability of concrete, for example, the water retention and slurry retention performance of the concrete can be significantly improved; the segregation of the concrete does not easily occur, and wrapping performance to gravels is good; the doping amount of the superplasticizer or the water consumption amount is appropriately increased, and the segregation and bleeding phenomenon cannot occur; the ground gripping phenomenon of the concrete can be effectively reduced.

Description

technical field [0001] The invention relates to a multifunctional liquid substance, in particular to a mud-resistant, slump-preserving and slow-release unsaturated functional monomer used in the production of polycarboxylic acid slump-preserving mother liquor. Background technique [0002] Water reducer is a concrete admixture that can significantly reduce the amount of mixing water while maintaining the slump of concrete basically unchanged. After years of development, concrete water reducers have gone through varieties such as lignosulfonate, naphthalene, sulfamate, aliphatic and polycarboxylic acid. Polycarboxylate superplasticizers have the advantages of high water-reducing rate and good adaptability to cementitious materials. Therefore, in recent years, the proportion of sales of polycarboxylate superplasticizers has gradually increased. In 2016, it reached 74% in China. However, clay minerals in sand and gravel will preferentially adsorb polycarboxylate superplasticiz...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G65/332C08F283/06C08F220/06C04B24/26C04B103/30
CPCC04B24/2694C04B2103/302C08F283/065C08G65/3322C08F220/06
Inventor 王志娟宋远明
Owner YANTAI UNIV
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