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Water-absorbing high polymer modified polyurethane grouting material and preparation method thereof

A technology of polymer modification and polyurethane, applied in polyurea/polyurethane adhesives, graft polymer adhesives, acidic copolymer adhesives, etc., can solve the problem of reducing the drying shrinkage speed of the consolidated body, Insufficient repair effect, poor structural elasticity and other problems, to achieve good water affinity effect, reduce foaming ratio, and complete foaming effect when encountering water

Active Publication Date: 2021-07-23
浙江鲁班建材科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] In order to overcome the waterproof failure problems caused by the long reaction time of the existing polyurethane grouting materials, large expansion and contraction rate, poor structural elasticity effect and insufficient single repair effect, the first purpose of the present invention is to provide a water-absorbing high polymer Modified polyurethane grouting material; the grouting material is injected into concrete cracks with a grouting machine, and under the action of the water-absorbing polymer, the grouting material can quickly complete foaming and consolidation during the pouring process; the water-absorbing polymer can also be used during the process Water absorption speeds up the consolidation and expansion speed of the grouting material, forming an elastic consolidated body mixed with water-absorbing polymer and polyurethane with a high water content, which can dynamically fill the cracks and reduce the drying shrinkage of the consolidated body; state, and can expand repeatedly to self-seal the cracks to achieve self-waterproof repair
The second purpose is to provide a water-absorbing polymer modified polyurethane grouting material and its preparation method

Method used

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  • Water-absorbing high polymer modified polyurethane grouting material and preparation method thereof
  • Water-absorbing high polymer modified polyurethane grouting material and preparation method thereof
  • Water-absorbing high polymer modified polyurethane grouting material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0072] A water-absorbing high polymer modified polyurethane grout is made of the following components and their weight components;

[0073] Polyether polyol 460 13 parts

[0074] Polyether polyol 480 22 parts

[0075] 16 parts of toluene diisocyanate

[0076] Starch grafted methyl acrylate water-absorbing resin 5 parts

[0077] Non-ionic polyacrylamide absorbent resin 7 parts

[0078] 13 parts of water-soluble silicone oil

[0079] Carbon tetrachloride 7 parts

[0080] Dimethyl carbonate 6 parts

[0081] The preparation method of the low-foaming strong adhesive elastic polyurethane grouting material:

[0082] 1) Put 13 parts of polyether polyol 460 and 22 parts of polyether polyol 480 into a reaction kettle equipped with a vacuum distillation device and a stirrer and raise the temperature to 115°C, and dehydrate continuously for 2 hours under a vacuum of 0.093 MPa. After the dehydration is completed, reduce the temperature to 80°C, add 16 parts of toluene diisocyanate w...

Embodiment 2

[0089] A water-absorbing high polymer modified polyurethane grout is made of the following components and their weight components;

[0090] Polyether polyol 460 46 parts

[0091] 14 parts toluene diisocyanate

[0092] 12 parts of starch-grafted acrylonitrile water-absorbing resin

[0093] 13 parts dibutyl phthalate

[0094] Dimethyl carbonate 15 parts

[0095] The preparation method of the low-foaming strong adhesive elastic polyurethane grouting material:

[0096] 3) Put 46 parts of polyether polyol 460 into a reaction kettle equipped with a vacuum distillation device and a stirrer and raise the temperature to 115°C, and continuously dehydrate for 2 hours under the condition of a vacuum degree of 0.093MPa. After the dehydration is completed, reduce the temperature to 80°C, add 14 parts of toluene diisocyanate under normal pressure, and control the temperature at 87°C for 2.5 hours;

[0097] 4) Put 12 parts of 325-mesh starch-grafted acrylonitrile and 13 parts of dibutyl ...

Embodiment 3

[0103] A low-foaming strong adhesive elastic polyurethane grout is made of the following components and their weight components;

[0104] Polyether polyol 480 44 parts

[0105] 16 parts of diphenylmethane diisocyanate

[0106] 7 parts starch grafted sodium acrylate

[0107] Cationic sodium polyacrylate 6 parts

[0108] 14 parts of 52# chlorinated paraffin

[0109] Xylene 13 parts

[0110] The preparation method of the low-foaming strong adhesive elastic polyurethane grouting material:

[0111] 1) Put 44 parts of polyether polyol 480 into a reaction kettle equipped with a vacuum distillation device and a stirrer and raise the temperature to 118°C, with a vacuum degree of 0.092MPa, and continue vacuum dehydration at this temperature for 2 hours. After the dehydration is completed, reduce the temperature to 80°C, add 16 parts of diphenylmethane diisocyanate under normal pressure, and control the temperature at 90°C for 2.5 hours;

[0112] 2) Put 7 parts of starch-grafted so...

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Abstract

The invention discloses a water-absorbing high polymer modified polyurethane grouting material and a preparation method thereof. The water-absorbing high polymer modified polyurethane grouting material is prepared from the following raw materials in limited amounts: polyether polyol, isocyanate, a water-absorbing high polymer, liquid filler and a solvent. The preparation method comprises the following steps: firstly, reacting polyether polyol with isocyanate to prepare a polyurethane grouting material prepolymer; and mixing the water-absorbing high polymer with the liquid filler, exhausting air, adding the mixture into the polyurethane grouting material prepolymer, and adjusting the viscosity by using a solvent to obtain the water-absorbing high polymer modified polyurethane grouting material. The water-absorbing high polymer modified polyurethane grouting material provided by the invention can quickly and completely foam when meeting water, the foaming shrinkage effect of polyurethane is reduced, the elastic effect is good, the purpose of quick leaking stoppage is ensured, the leaking stoppage effect of secondary and multiple circulating water is achieved in a repeated water environment, and under the condition that gas and water of a consolidated body are lost, the grouting joint cannot be damaged or separated from the consolidated body, the aim of leaking stoppage can be achieved through one-time grouting, and great significance is achieved for building waterproof engineering.

Description

technical field [0001] The invention belongs to the technical field of building waterproof materials, and in particular relates to a water-absorbing polymer-modified polyurethane grouting material and a preparation method thereof. The water-absorbing polymer-modified polyurethane grouting material is a material for building structure crack repair and water blocking. Background technique [0002] Polyurethane grouting material is one of the commonly used grouting materials for building crack plugging and repairing. Polyurethane grouting material is made by reacting polymer polyol and polyisocyanate, with excess isocyanate prepolymer as the main body, and other additives are added. According to the difference of raw materials, it can be divided into water-soluble polyurethane grout and oil-soluble polyurethane grout. Both types of polyurethane grouts can be used for building crack plugging and repairing. [0003] The polyurethane grouting material is injected into the cracks...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J175/08C09J151/02C09J133/26C09J183/04C09J133/02C08J9/00
CPCC09J175/08C08J9/0061C08L2205/035C08J2375/08C08J2451/02C08J2433/26C08J2483/04C08L51/02C08L33/26C08L33/02C08L83/04
Inventor 魏红超李宝项晓睿
Owner 浙江鲁班建材科技股份有限公司
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