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Polymonoether for polycarboxylate superplasticizer and polycarboxylate superplasticizer, and preparation methods thereof

A technology of polycarboxylic acid series and monomer polyether, which is applied in the field of polycarboxylate water reducing agent monomer polyether, can solve the problem of high impurity content, unsaturation not meeting the requirements, number average molecular weight not increasing, etc. problems, to achieve the effect of low impurity content, reduced impurity content, and improved application performance

Active Publication Date: 2017-07-04
SHANGHAI DONGDA CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is that, in order to overcome the disadvantages of polycarboxylate water reducer monomer polyether in the prior art that the number average molecular weight does not increase during synthesis, the degree of unsaturation does not meet the requirements and the impurity content is too high, etc., And provide a kind of polycarboxylate water reducer monomer polyether, polycarboxylate water reducer and preparation method thereof

Method used

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  • Polymonoether for polycarboxylate superplasticizer and polycarboxylate superplasticizer, and preparation methods thereof
  • Polymonoether for polycarboxylate superplasticizer and polycarboxylate superplasticizer, and preparation methods thereof
  • Polymonoether for polycarboxylate superplasticizer and polycarboxylate superplasticizer, and preparation methods thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0083] The raw material formula that present embodiment adopts is as follows:

[0084] Preparation:

[0085] Intermediate A→Intermediate B steps:

[0086]

[0087] Mix the intermediate A, the main catalyst and the co-catalyst, vacuum the ethoxylation device, turn on the canned pump, then raise the temperature to 95-105°C, vacuum dehydrate for 1 hour, and add ethylene oxide under the pressure of -0.095MPa One-third of the total amount of alkanes, mature, then add one-half of the total amount of propylene oxide, mature; then add one-third of the total amount of ethylene oxide, mature, then add the total amount of propylene oxide One-half of the ethylene oxide is added for curing; then the remaining ethylene oxide is added for curing. During the whole reaction process, the pressure of the reaction system is controlled at 0.2-0.4 MPa;

[0088] Intermediate B→monomer polyether:

[0089] Intermediate B

[0090]

[0091]Mix the intermediate B, the main catalyst and the co-c...

Embodiment 2

[0094] The raw material formula that present embodiment adopts is as follows:

[0095] Preparation:

[0096] Intermediate A→Intermediate B steps:

[0097]

[0098] Mix the intermediate A, the main catalyst and the co-catalyst, vacuum the ethoxylation device, turn on the canned pump, then raise the temperature to 95-105°C, vacuum dehydrate for 1 hour, and add ethylene oxide under the pressure of -0.095MPa One-third of the total amount of alkanes, mature, then add one-half of the total amount of propylene oxide, mature; then add one-third of the total amount of ethylene oxide, mature, then add the total amount of propylene oxide One-half of the ethylene oxide is added for curing; then the remaining ethylene oxide is added for curing. During the whole reaction process, the pressure of the reaction system is controlled at 0.2-0.4 MPa;

[0099] Intermediate B→monomer polyether:

[0100] Intermediate B

[0101]

[0102] Mix the intermediate B, the main catalyst and the co-...

Embodiment 3

[0105] The raw material formula that present embodiment adopts is as follows:

[0106] Preparation:

[0107] Intermediate A→Intermediate B steps:

[0108]

[0109] Mix the intermediate A, the main catalyst and the co-catalyst, vacuum the ethoxylation device, turn on the canned pump, then raise the temperature to 95-105°C, vacuum dehydrate for 1 hour, and add ethylene oxide under the pressure of -0.095MPa One-third of the total amount of alkanes, mature, then add one-half of the total amount of propylene oxide, mature; then add one-third of the total amount of ethylene oxide, mature, then add the total amount of propylene oxide One-half of the ethylene oxide is added for curing; then the remaining ethylene oxide is added for curing. During the whole reaction process, the pressure of the reaction system is controlled at 0.2-0.4 MPa;

[0110] Intermediate B→monomer polyether:

[0111] Intermediate B

[0112]

[0113] Mix the intermediate B, the main catalyst and the co-...

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Abstract

The invention discloses polymonoether for a polycarboxylate superplasticizer and the polycarboxylate superplasticizer, and preparation methods thereof. The polymonoether for the polycarboxylate superplasticizer has a hydroxyl value of 9.5 to 11.5 mg KOH / g and is allylalcohol polyoxyethylene polyoxypropylene ether, methylallylalcohol polyoxyethylene polyoxypropylene ether, isopentenol polyoxyethylene polyoxypropylene ether or 4-hydroxybutylvinyl polyoxyethylene ether. The polymonoether for the polycarboxylate superplasticizer has high molecular weight, high degree of unsaturation and low impurity content, so the later application performance of the polymonoether is obviously improved; and the polymonoether enables cost for raw materials to be reduced compared with the prior art, so the profit rate of the produced polycarboxylate superplasticizer is increased, and the polymonoether has good industrial value.

Description

technical field [0001] The invention relates to a polycarboxylate water reducer monomer polyether, a polycarboxylate water reducer and a preparation method thereof. Background technique [0002] The existing polycarboxylate water-reducing agent monomer polyether mainly uses allyl alcohol, methallyl alcohol, prenyl alcohol and 4-hydroxybutyl vinyl ether as initiators, and ethoxylates are generated from them. Chemical reaction to obtain a monomeric polyether with a number average molecular weight of 2400, such as: HPEG2400 and TPEG2400, etc. The highest number average molecular weight common in the market is not more than 3000. This is because on the one hand, under the conditions of alkaline hydroxide, alkali metal, and alkali metal oxide as a catalyst, the number average molecular weight of monofunctional enol polyether is not easy to exceed 3500, which is technically difficult; After the number average molecular weight of enol polyether goes up, the degree of unsaturation...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G65/28C08F283/06C08F220/06C04B24/26C04B103/30
CPCC04B24/2605C04B2103/302C08F283/065C08G65/2606C08G65/2648C08G65/2687C08F220/06
Inventor 董建国涂天平赵鑫罗琼杜辉王振波
Owner SHANGHAI DONGDA CHEM
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