Ethers early strength type polycarboxylate water reducer and preparation method thereof

An early-strength polycarboxylate technology, which is applied in the field of ether-based early-strength polycarboxylate water reducers and their preparation, can solve the problems of reducing 28d strength, achieve superior early-strength performance, stable performance, and easy control of conditions Effect
CN103450408AActive Publication Date: 2013-12-18KZJ NEW MATERIALS GROUP CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
KZJ NEW MATERIALS GROUP CO LTD
Publication Date
2013-12-18

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Abstract

The invention discloses an ethers early strength type polycarboxylate water reducer and a preparation method thereof. The water reducer regards unsaturated esters, N,N-bis(2-hydroxyethyl)isopropanolamine (DIEPA), 2-acrylamide-2-methylpropanesulfonic acid (AMPS), methyl allyl polyoxyethylene polyoxypropylene ether (TPEG) and the like as main chemical synthesis raw materials, and the main chemical synthesis raw materials are subjected to amidation and copolymerization in certain conditions under the action of a catalyst, an initiator, a chain transfer agent and the like, so that a high-molecular polymer with an amphoteric structure is obtained. The molecular structure of the water reducer comprises hydrophilic hydroxyl, hydrophilic carboxyl, hydrophilic acylamino, hydrophilic sulfonyl, hydrophobic carbon chains and a polyoxyethylene polyoxypropylene ether long-chain structure with certain stereo-hindrance effects, wherein an N containing group can improve early strength of concrete obviously. Therefore, the ethers early strength type polycarboxylate water reducer is applicable to pre-cast concrete components which need improvement of early strength.
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Description

technical field

[0001] The invention belongs to the technical field of building materials, and in particular relates to an ether early-strength polycarboxylate water reducer and a preparation method thereof. Background technique

[0002] Polycarboxylate superplasticizer, as a new type of high-performance superplasticizer, has low dosage, high water reducing rate, good slump retention, small shrinkage, relatively good adaptability to cement and admixtures, and enhanced effect Obviously, a series of outstanding performance. At the same time, the production process is environmentally friendly and has been widely used in various engineering fields.

[0003] With the increasing demand for prefabricated components in the construction of railways, highways, subways, etc., it is very important to study the early-strength polycarboxylate superplasticizer that is suitable for precast concrete, can significantly improve the early strength of concrete, and accelerate the turnover speed...

Claims

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