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A kind of preparation method of water-soluble superabsorbent resin inner curing agent

A super absorbent resin, water-soluble technology, used in climate sustainability, sustainable waste treatment, solid waste management, etc., can solve the problems of uneven film formation, reduce early shrinkage of concrete, and unfavorable direct brushing use, etc. To achieve the effect of enhanced adhesion and surface energy, improved penetration, and rapid film formation

Active Publication Date: 2022-05-20
鹤壁宝来化工科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The modified superabsorbent resin internal curing agent prepared by this method can effectively control the water absorption rate of the water-absorbing resin used for concrete curing, reduce the early shrinkage of concrete, and improve the working performance and compressive strength of concrete. However, the curing agent product needs to be dehydrated, separated, The powder material obtained after drying is not conducive to direct brushing and use, and the film-forming effect is uneven

Method used

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  • A kind of preparation method of water-soluble superabsorbent resin inner curing agent
  • A kind of preparation method of water-soluble superabsorbent resin inner curing agent
  • A kind of preparation method of water-soluble superabsorbent resin inner curing agent

Examples

Experimental program
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Effect test

Embodiment 1

[0023] (1) First, 35 parts of dioctyl methyl tertiary amine were dissolved in 865 parts of n-propanol, and then 100 parts of 4-phenyl-3-butene-2-ketone were stirred at 35 °C for 3h to obtain unsaturated enylamine monomers; then 100 parts of unsaturated enylamine monomers, 35 parts of tetrafluoroethylene and 450 parts of isomeric trihydroster polyoxyethylene ether phosphate were dissolved in 414.5 parts of water, and the free radical polymerization reaction was carried out under the action of 0.5 parts dimethylaminopyridine, and the water-soluble superabsorbent resin was obtained by stirring at 30 °C for 3h to obtain a water-soluble superabsorbent resin.

[0024] (2) 100 parts of octamethylcyclotetrasiloxane was dissolved in 230 parts of diisopropylfluorophosphate, and 0.2 parts of neocapric acid peroxide were added while stirring to react for 1h to give a modified silicon propylene solution.

[0025] (3) 26 parts of modified silicon propylene emulsion dropwise added to 100 parts o...

Embodiment 2

[0027] (1) First, 46 parts of N, N'-di-tert-butylethylenediamine were dissolved in 854 parts of glycerin, and then 100 parts of 3-penten-2-ketones were stirred at 15 °C for 6h to obtain unsaturated enuremide monomers; then 100 parts of unsaturated enurem monomers, 72 parts octafluoroisobutene and 520 parts of isooctanol polyoxyethylene ether phosphate were dissolved in 307.2 parts of water, and the free radical polymerization reaction was carried out under the action of 0.8 parts of toliesulfonic acid, and the water-soluble superabsorbent resin was obtained by stirring at 10 °C for 6 hours.

[0028] (2) 100 parts of octamethylcyclotetrasiloxysiloxane was dissolved in 360 parts of diisopropyl fluorophosphate, and 0.3 parts of tert-butyl peroxyprovalerate were added while stirring for 3 h to give a modified silicon propylene solution.

[0029] (3) 57 parts of modified silicon propylene emulsion dropwise added to 100 parts of water-soluble superabsorbent resin and 843 parts of water ...

Embodiment 3

[0031] (1) First, 42 parts of N-tert-butoxycarbonyldiamine were dissolved in 858 parts of n-propanol, and then 100 parts of 2-butenal were stirred at 20 °C for 4h to obtain unsaturated enuremide monomers; then 100 parts of unsaturated enalamine monomers, 63 parts of tetrafluoroethylene and 480 parts of isooctanol polyoxyethylene ether phosphate were dissolved in 356.38 parts of water, and the free radical polymerization reaction was carried out under the action of 0.62 parts of trifluoroacetic anhydride, and the water-soluble superabsorbent water resin was obtained by stirring for 5 hours at 20 °C.

[0032] (2) 100 parts of octamethylcyclotetrasiloxane dissolved in 325 parts of diisopropylfluorophosphate, while stirring while adding 0.26 parts of neocapric peroxide reaction for 2h, to give a modified silicon propylene solution.

[0033] (3) 32 parts of modified silicon propylene emulsion dropwise added to 100 parts of water-soluble superabsorbent resin and 868 parts of water mixed...

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Abstract

The invention relates to a preparation method of a water-soluble superabsorbent resin internal curing agent. The following specific steps are adopted: first, unsaturated aldehydes and ketones are used to modify unsaturated enamines in tertiary amines to obtain unsaturated enamine monomers; Monomer monomers, organic fluorine monomers, and unsaturated polyphosphates are subjected to free radical polymerization under the action of a catalyst. After the reaction is completed, modified silicon-acrylic emulsion is used for secondary modification to obtain a water-soluble superabsorbent Resin internal curing agent. The water-soluble superabsorbent resin internal curing agent prepared by the method of the invention can rapidly fuse with concrete surface moisture, can effectively control the water absorption rate in the concrete curing process, significantly reduce the early shrinkage of the concrete, and improve the durability of the concrete.

Description

Technical field [0001] The present invention relates to a technical field of an internal curing agent, in particular to a method for preparing a water-soluble superabsorbent resin internal curing agent. Background [0002] Concrete is one of the building materials in modern society, mainly used in highways, bridges, tunnels and civil buildings, and its strength development and durability are crucial to buildings. The guarantee of concrete strength is inseparable from cement grade, amount of rubber, water-glue ratio, age and other factors, and is more related to the maintenance mode of concrete, and a good maintenance method can ensure the full hydration of cement and promote strength growth. However, the maintenance is not timely, the moisture evaporation on the surface of the concrete is too fast, which will cause the moisture in the internal pores to rise to the surface, and the moisture will gradually affect the hydration of the cement particles inside the concrete after furth...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B24/42C08F283/06C08F214/26C08F214/18C08F226/02C04B24/24
CPCC04B40/0039C08F283/06C04B24/246C04B24/42C04B22/002C08F214/265C08F214/186C08F226/02Y02W30/91
Inventor 孙新建孟杰陈召华朱安玉刘久玉孙坡坡
Owner 鹤壁宝来化工科技有限公司
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