Composite polymerization inhibitor and application thereof, high-stability polyether for polycarboxylate superplasticizer and preparation method of high-stability polyether

A composite polymerization inhibitor and high-stability technology, used in composite polymerization inhibitor and its application, high-stability polyether for polycarboxylate water reducer and its preparation field, can solve the problem that polyether macromonomer is easy to degrade, Poor stability and other problems, to achieve the effect of not easy to decompose, high stability, good polymerization inhibition efficiency

Active Publication Date: 2022-01-11
KZJ NEW MATERIALS GROUP CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the problems of easy degradation and poor stability in the storage or transfer process of the polyether macromonomer mentioned in the above-mentioned background technology

Method used

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  • Composite polymerization inhibitor and application thereof, high-stability polyether for polycarboxylate superplasticizer and preparation method of high-stability polyether
  • Composite polymerization inhibitor and application thereof, high-stability polyether for polycarboxylate superplasticizer and preparation method of high-stability polyether
  • Composite polymerization inhibitor and application thereof, high-stability polyether for polycarboxylate superplasticizer and preparation method of high-stability polyether

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Experimental program
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Effect test

preparation example Construction

[0024] The present invention also provides a method for preparing a compound inhibitor and a highly stable polyether for polycarboxylate water reducing agent, which comprises the following steps:

[0025] (1) In parts by weight, weigh 10 to 50 parts of phenolic polymerization inhibitors, 10 to 50 parts of hindered amine polymerization inhibitors, 1 to 10 parts of auxiliary polymerization inhibitors, 0.1 to 5 parts of metal salts and 0.5 to 5 parts of part emulsifier;

[0026] (2) Put the above-mentioned raw material components into the preparation tank, raise the temperature to 40-60°C, use a high-speed dispersing shearer to stir the raw material components, and form a homogeneous composite inhibitor after stirring for 30-60 minutes, wherein , the stirring speed is 500~8000rpm / min.

[0027] (3) In parts by weight, add 100 parts of solvent to the composite polymerization inhibitor obtained in step (2), and continue stirring for 30 to 60 minutes to obtain a composite polymeriza...

Embodiment 1

[0041] (1) Add phenolic polymerization inhibitors, hindered amine polymerization inhibitors, auxiliary polymerization inhibitors, metal salts and emulsifiers to the polymerization inhibitor preparation tank, raise the temperature to 40 ° C, and use a high-speed dispersing shear to stir , the stirring speed is 6000rpm / min, and after stirring for 30min, a composite inhibitor in a homogeneous state is formed. Then add 100 parts of deionized water in above-mentioned composite polymerization inhibitor, continue to stir 60min, obtain the composite polymerization inhibitor emulsion that is emulsion state;

[0042] Among them, the composite inhibitor is compounded according to the following mass ratio: 10 parts of 2-(5-chloro-2-benzenetriazolyl)-6-tert-butyl-4-methylphenol, 50 parts of 4-hydroxy-2 , 2,6,6-tetramethylpiperidine-1-oxyl radical, 10 parts of dilauryl thiodipropionate, 0.1 part of bis(N,N-dibutyldithiocarbamate) copper and 5 Parts Emulsifier 1360.

[0043] (2) Carry out ...

Embodiment 2

[0046] (1) Add phenolic polymerization inhibitors, hindered amine polymerization inhibitors, auxiliary polymerization inhibitors, metal salts and emulsifiers to the polymerization inhibitor preparation tank, raise the temperature to 40 ° C, and use a high-speed dispersing shear to stir , the stirring speed is 8000rpm / min, and after stirring for 60min, a composite inhibitor in a homogeneous state is formed. Then add 100 parts of deionized water in above-mentioned composite polymerization inhibitor, continue to stir 60min, obtain the composite polymerization inhibitor emulsion that is emulsion state;

[0047] Among them, the composite polymerization inhibitor is compounded according to the following mass ratio: 20 parts of 2,4-dimethyl-6-tert-butylphenol, 40 parts of 4-benzoyloxy-2,2,6,6-tetra Methylpiperidine-1-oxyl radical, 5 parts ditetradecyl 3,3'-thiodipropionate, 1 part basic copper carbonate, and 0.5 parts Emulsifier 1340.

[0048] (2) Carry out air tightness inspection ...

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Abstract

The invention relates to the technical field of concrete admixtures, in particular to a composite polymerization inhibitor and an application thereof, high-stability polyether for a polycarboxylate superplasticizer and a preparation method of the high-stability polyether. The composite polymerization inhibitor comprises the following components in parts by weight: 10-50 parts of a phenol polymerization inhibitor, 10-50 parts of a hindered amine polymerization inhibitor, 1-10 parts of an auxiliary polymerization inhibitor, 0.1-5 parts of metal salt and 0.5-5 parts of an emulsifier, wherein the auxiliary polymerization inhibitor is a thioester antioxidant. The composite polymerization inhibitor can efficiently inhibit the generation of a polymer through the synergistic polymerization inhibition effect of all the components, and has better polymerization inhibition efficiency; when being applied to a polyether macromonomer for a polycarboxylate superplasticizer, the polyether macromonomer can efficiently inhibit the generation of a polymer in the polyether macromonomer, and can be used for preparing polyether which is not easy to decompose and has high stability.

Description

technical field [0001] The invention relates to the technical field of concrete admixtures, in particular to a composite polymerization inhibitor and its application, a high-stability polyether for polycarboxylate water reducer and a preparation method thereof. Background technique [0002] Polycarboxylate superplasticizer is widely used in various concrete construction projects. It is mainly prepared by free radical copolymerization of polyether macromonomer, unsaturated small monomer, initiator and chain transfer agent in aqueous solution. Commonly used polyether macromonomers contain unsaturated double bonds on the end groups. Common varieties include methallyl polyoxyethylene ether, isopentenyl polyoxyethylene ether, 4-hydroxybutyl vinyl Polyoxyethylene ether, ethylene glycol monovinyl polyoxyethylene ether, diethylene glycol monovinyl polyoxyethylene ether, allyl polyoxyethylene ether, polyethylene glycol monomethyl ether methacrylic acid Esters, etc., are generally pr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F2/42C08G65/28
CPCC08F2/42C08G65/2609Y02W30/91
Inventor 方云辉陈展华肖悦林晓森李跃容郭元强
Owner KZJ NEW MATERIALS GROUP CO LTD
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