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A kind of method for preparing general comprehensive polycarboxylate water reducer

A technology of polycarboxylic acid and water reducing agent, which is applied in the field of concrete water reducing agent preparation, can solve the problems of precipitation, inability to add materials, affecting performance, etc.

Active Publication Date: 2022-07-05
TIANSHUI NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] For the reactors in the process of preparing polycarboxylate superplasticizers for industrialization or production system design, multiple reactors are usually designed and installed in the "I" type, "L" type, "H" type or "U" mode. , the reaction raw material tank can only be erected directly above the reactor for feeding, and the reaction solid material tank can only be transported to one reactor through a belt conveyor, and one belt conveyor cannot feed several reactors, and a reaction occurs Difficulty in powder feeding
Therefore, adding powder to multiple reaction vessels requires multiple reaction raw material storage tanks and multiple belt conveyors, making the feeding system complicated
[0005] At the same time, the water reducer obtained from the reaction is put into the storage tank, and the water reducer in the storage tank will precipitate after a period of time, which will affect its performance.
However, there is no relevant report on a set of universal and efficient multi-component polymerization to prepare a general-purpose comprehensive polycarboxylate superplasticizer industrial production method and process equipment

Method used

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  • A kind of method for preparing general comprehensive polycarboxylate water reducer
  • A kind of method for preparing general comprehensive polycarboxylate water reducer
  • A kind of method for preparing general comprehensive polycarboxylate water reducer

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Effect test

Embodiment 1

[0067] The method for preparing a general-purpose comprehensive polycarboxylate water-reducing agent described in the present invention adopts multi-component copolymerization to form a general-purpose comprehensive polycarboxylate water-reducing agent, and the realization steps are as follows:

[0068] (1) Preparation of raw materials:

[0069] Preparation of unsaturated polyether macromonomer A: Weigh 800Kg (according to 50 parts) allyl alcohol polyoxyethylene ether APEG, number average molecular weight 1500 and 800Kg (according to 50 parts) polyethylene glycol monomethyl ether MPEG, The number average molecular weight is 1500, waiting for standby;

[0070] Preparation of starch and its modified starch monomer D: Weigh 5 parts of ordinary corn starch, 5 parts of gelatinized starch and 5 parts of sulfonated starch for subsequent use;

[0071] Preparation of preservative F: Weigh 0.05 part of dimethyl fumarate and put it in a beaker for later use;

[0072] The liquid dispens...

Embodiment 2

[0094] The method for preparing a general-purpose comprehensive polycarboxylate water-reducing agent described in the present invention adopts multi-component copolymerization to form a general-purpose comprehensive polycarboxylate water-reducing agent, and the realization steps are as follows:

[0095] (1) Preparation of raw materials:

[0096] Preparation of unsaturated polyether macromonomer A: Weigh 800Kg (according to 50 parts) methallyl polyoxyethylene ether (TPEG, 2400) and 800Kg (according to 50 parts) isopentenol polyoxyethylene ether (HPEG, 2400), spare;

[0097] Preparation of starch and its modified starch monomer D: Weigh 5 parts of common wheat starch, 5 parts of gelatinized starch and 5 parts of sulfonated starch for subsequent use;

[0098] Preparation of preservative F: Weigh 0.05 part of dimethyl fumarate and put it in a beaker for later use;

[0099] The liquid dispensing in the 1-8# batching storage tanks in the liquid-phase batching storage tank group 2 ...

Embodiment 3

[0119] (1) Preparation of raw materials:

[0120] Preparation of unsaturated polyether macromonomer A: Weigh 400Kg (according to 25 parts) allyl alcohol polyoxyethylene ether (APEG, number average molecular weight 1500), 400Kg (according to 25 parts) polyethylene glycol monomethyl ether (MPEG, number average molecular weight 1500), 400Kg (by 25 parts) methallyl polyoxyethylene ether (TPEG, number average molecular weight 1500) and 400Kg (by 25 parts) isoprenol polyoxyethylene ether ( HPEG, number average molecular weight 1500), for subsequent use;

[0121] Preparation of starch and its modified starch monomer D: Weigh 5 parts of ordinary potato starch, 5 parts of gelatinized starch and 5 parts of sulfonated starch for subsequent use;

[0122] Preparation of preservative F: Weigh 0.05 part of dimethyl fumarate and put it in a beaker for later use;

[0123] The liquid dispensing in the 1-8# batching storage tanks in the liquid-phase batching storage tank group 2 is as follows:...

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Abstract

The invention discloses a method and a device for preparing a general comprehensive polycarboxylate water reducer. The method of the invention adopts a multi-component copolymerization method to synthesize a general-purpose comprehensive polycarboxylate water-reducing agent. The raw materials include unsaturated polyether macromonomer, unsaturated carboxylic acid small monomer, anti-sludge functional monomer, starch and its modified starch. Monomer, tap water purifying agent, slump-preserving functional monomer, retarding functional monomer, antiseptic, initiator, chain transfer agent, oxidant, reducing agent and lye; the device of the present invention has a distributed structure of annular matrix. The method of the invention has strong operability, and the water reducing agent prepared has good comprehensive performance and working performance; the device of the invention has strong operability and can improve the working efficiency; the obtained product has uniform composition, stable quality, novel structure and covers an area of ​​space Small size, low processing cost, easy industrial production, and potential industrial value and application prospects.

Description

technical field [0001] The invention relates to the field of concrete water-reducing agent preparation, in particular to a method and a device for preparing a general-purpose comprehensive polycarboxylate water-reducing agent. Background technique [0002] Polycarboxylate superplasticizer is a new generation of high-efficiency water-reducing agent. According to its performance and application, it is divided into retarded type, slow-release type, early-strength type, slump-preserving type, mud-resistant and salt-resistant type, general-purpose comprehensive type, etc. In recent years, domestic and foreign scholars and their production technicians have carried out a lot of research on the preparation methods of polycarboxylate superplasticizers with different functions, and they have achieved good results in both theoretical research and production practice research. However, it is a pity that almost most of the research is still in the laboratory shaking flask pilot stage, an...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F283/06C08F222/02C08F228/02C08F220/06B01J19/18
CPCC08F283/065C08F251/00B01J19/18C08F220/06C08F228/02C08F222/02
Inventor 章德玉张惠琴赵爱英张建斌司长代王鹏刘岿李志锋王小芳刘新文雷新有吕玲玲唐慧安郭峰刘流左国防
Owner TIANSHUI NORMAL UNIV