A method and device for preparing mud-resistant polycarboxylate superplasticizer

Abstract

The invention discloses a method and a device for preparing an anti-mud type polycarboxylate water reducer. This method adopts multi-component copolymerization method to synthesize mud-resistant polycarboxylate water reducer, and the synthetic raw materials adopted include unsaturated polyether macromonomer, unsaturated carboxylic acid small monomer, starch and its modified starch monomer, It is composed of mud-type functional monomer, tap water purifying agent, preservative, initiator, chain transfer agent, oxidizing agent, reducing agent and lye. The invention improves the operability of the production system for producing mud-resistant polycarboxylate superplasticizer by multi-component polymerization, and improves the work efficiency, product composition uniformity and quality stability. At the same time, the device has novel structure, simple and continuous operation, and The invention has the characteristics of convenience, small occupied area, low processing cost and easy industrialization, and has potential industrialization value and application prospect.

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 mud-resistant 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 type, salt-resistant type, 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 have achieved good results in both theoretical research and production practice research. [0003] Regarding the research progress of anti-mud / mud-resistant polycarboxylate water-reducing agent, because the water-reducing agent is very ...

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Problems solved by technology

[0006] For the reactors in the production process or production system design process, usually "I", "L", "H" or "U" methods are used to design and install multiple reactors, and the reaction raw material tanks can only be erected on Feeding directly above the reaction kettle, in which the reaction solid material tank can only be transported to one reaction kettle through a belt conveyor, and one belt conveyor cannot feed several reactors, and there is a problem of difficulty in feeding the reaction powder

Therefore, adding powder to multiple reaction vessels requires multiple reaction raw material storage tanks and multiple belt conveyors, making the feeding system complicated

[0007] 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 industrialized production methods and production systems for the preparation of mud-resistant polycarboxylate superplasticizers with universal and efficient multi-component polymerization.

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