High-performance environment-friendly single-component hydrophobic polyurethane grouting material and preparation method thereof

An environmentally friendly, polyurethane technology, used in the field of grouting and waterproof plugging materials, can solve problems such as poor hydrophilicity, and achieve the effects of good plasticizing effect, high dimensional stability and moderate viscosity

Active Publication Date: 2015-05-06
JIANGSU SOBUTE NEW MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention aims to provide a high-performance environment-friendly one-component hydrophobic polyurethane grouting material. By adding porous fillers in the system, the hydrophobic slurry material can absorb water when it encounters water, and solve the problem of the interface of the slurry material due to its strong hydrophobicity. For the defect of poor hydrophilicity, through the design and adjustment of the molecular structure of the pulp material, while ensuring its better mechanical properties, it has high dimensional stability and excellent acid, alkali and salt resistance. It greatly improves the acid, alkali and salt corrosion resistance and engineering durability of the product

Method used

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  • High-performance environment-friendly single-component hydrophobic polyurethane grouting material and preparation method thereof
  • High-performance environment-friendly single-component hydrophobic polyurethane grouting material and preparation method thereof
  • High-performance environment-friendly single-component hydrophobic polyurethane grouting material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] Add 100g of polyether polyol N204 to 90.4g of hexamethylene-1,6-diisocyanate, raise the temperature to 75°C for 3 hours, then add 40.5g of n-butanol, continue the reaction for 2 hours, cool down and discharge to obtain liquid polyurethane plasticized agent.

[0046] Weigh 12g polyether polyol N210, 5g polyether polyol N220, 10g polyester polyol PS-3152, 3g polyether polyol 303, 1g polytetramethylene ether glycol 1000, 1g hydroxyl-terminated polybutadiene together Put it into the reaction kettle, vacuum dehydration at -0.08~-0.1MPa, 110~120°C for 2 hours (raw material moisture content ≤0.05%), cool down to 55°C, add 113g polyphenyl polymethylene poly Isocyanate (-NCO content 30.5~32%), after stirring for 30 minutes under nitrogen atmosphere, heat up to 70 ° C, react for 3 hours, after the reaction is completed, the temperature drops to 50 ° C to obtain a polyurethane prepolymer; to the above polyurethane prepolymer Add 7.5g liquid polyurethane plasticizer, 15g diatomit...

Embodiment 2

[0050] Add 100g of polyether polyol N210 into the reaction vessel, vacuum dehydrate at -0.08~-0.1MPa, 110~120°C for 2 hours, cool down to 60~65°C, add 33.6g of 1,6-hexamethylene diisocyanate, and heat up to 80°C React for 2 hours, then add 14.4g of n-butanol, continue to react for 2 hours, cool down and discharge to obtain a liquid polyurethane plasticizer;

[0051] Weigh 20g polyether polyol N204, 10g polyether polyol 303, 5g PTMEG1800, 1g hydroxyl-terminated polybutadiene Polybd R-45HT (molecular weight 2700~2900, hydroxyl value 42~50mgKOH / g,), 1g hydroxyl-terminated polybutadiene Add epichlorohydrin (molecular weight 2800~3000, hydroxyl value 33~40mgKOH / g, functionality 1.8~2) into the reaction vessel together, vacuum dehydration for 2 hours, after dehydration (moisture content of raw materials ≤0.05%), cool down to 55~ 80°C, add 143g of PAPI to the reaction vessel, heat and stir for 30min under nitrogen atmosphere, then raise the temperature to 70°C, react for 3 hours, aft...

Embodiment 3

[0055] Add 100g of polyether polyol N220 into the reaction kettle, dehydrate at -0.08~-0.1MPa, 110~120°C for 2 hours, cool down to 60°C, add 16.8g of hexamethylene-1,6-diisocyanate, Raise the temperature to 80°C for 2 hours, then add 10 g of n-hexanol, continue the reaction for 2 hours, cool down and discharge to obtain a liquid polyurethane plasticizer;

[0056] Weigh 12g polyether polyol N204, 5g polyether polyol N220, 10g polypropylene carbonate polyol (molecular weight 1800~2200, hydroxyl value 45~55mgKOH / g), 3g polyether polyol 303, 1.1g PTMEG650, 5g hydroxyl-terminated polybutadiene Polybd CS-15 (molecular weight 2800~3600, hydroxyl value 34~48mgKOH / g), 1g hydroxyl-terminated polyepichlorohydrin (molecular weight 2800~3000, hydroxyl value 33~40mgKOH / g), together Put it into the reaction vessel, vacuum dehydrate for 2 hours, after dehydration (moisture content of raw materials ≤ 0.05%), cool down to 55~80°C, add 250g of PAPI to the reaction kettle, keep stirring for 30min...

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Abstract

The invention relates to a high-performance environment-friendly single-component hydrophobic polyurethane grouting material. The high-performance environment-friendly single-component hydrophobic polyurethane grouting material comprises the following substances: 100 parts of a polyurethane prepolymer, 1-10 parts of diatomaceous earth powder, 5-25 parts of polyurethane plasticizer, 5-25 parts of environment-friendly plasticizer, 10-35 parts of an environment-friendly solvent, 2-10 parts of a foam stabilizer, 0.2-2 parts of a catalyst and 0-0.2 part of a storage stabilizer. During construction, the hydrophobic polyurethane grouting material is single liquid grouting, the grouting material is environmentally friendly and free of pollution and can permeate inside various leakage water channels by virtue of grouting pressure and low viscosity, is in contact with water in the leakage gaps to rapidly absorb moisture by virtue of a porous filler and rapidly react with water for foaming. The grouting material and water are rapidly reacted and cured, the more excellent mechanical properties of the grouting material is ensured and the grouting material is high in dimensional stability so that the acid, salt alkali salt corrosion resistance of a product and engineering durability are increased to an utmost extent.

Description

technical field [0001] The invention belongs to the field of grouting and waterproof plugging materials, in particular to a high-performance and environment-friendly single-component hydrophobic polyurethane grouting material and a preparation method thereof. Background technique [0002] Polyurethane grouting material is a new type of polymer chemical grouting material. It has many excellent properties such as good permeability, good water blocking effect, and strong adhesion. It has gradually become one of the most widely used chemical grouting materials. It is generally divided into pro- There are two types of water-based (water-soluble) and hydrophobic (oil-soluble), among which hydrophobic polyurethane grouting materials have high strength and strong impermeability. Engineering durability (hydrophilicity prone to shrinkage) is better. [0003] However, there are still some problems in the mainstream products of hydrophobic polyurethane grouting materials currently used...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L75/04C08L75/08C08L75/14C08K13/04C08K7/26C08G18/76C08G18/69C08G18/48C08G18/42C08G18/44C08G18/12
Inventor 刘玉亭孙德文冉千平杨冲万赟李波尹浩
Owner JIANGSU SOBUTE NEW MATERIALS
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