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Polyurethane-water glass composite grouting material and preparation method thereof

A grouting material and water glass technology, applied in the field of construction materials, can solve the problems of inconvenience in actual production and construction, poor initial setting time, poor compressive strength and elastic modulus, catalyst components and water glass are prone to delamination, etc. Achieve the effect of shortening the initial setting time, good pourability and good compressive strength

Inactive Publication Date: 2018-08-17
徐冬
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention: the performance of the existing polyurethane grouting materials such as poor initial setting time, compressive strength, elastic modulus, etc., and the catalyst component and water glass are prone to delamination, which brings many problems to actual production and construction. Inconvenient problem, a polyurethane water glass composite grouting material and its preparation method are provided

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0030] Take 150g of water glass, 30g of polyoxypropylene triol, and 10g of neopentyl glycol, put them into a high-pressure reactor, seal and evacuate until the vacuum in the reactor is 100Pa, then heat to 100°C for dehydration for 2 hours, and cool to room temperature To obtain a pretreatment liquid, add 0.9g dibutyltin dilaurate, 1g silane coupling agent, 0.3g surfactant to the pretreatment liquid, stir at 300r / min for 20min, obtain A component, take polyoxypropylene triol Put it into a high-pressure reactor, seal and evacuate until the vacuum degree in the reactor is 100Pa, then heat to 100°C for dehydration treatment for 2 hours, and cool to 60°C to obtain dehydration-treated polyoxypropylene triol, take 40g of dehydration-treated polyoxypropylene triol Alcohol, 64g diphenylmethane diisocyanate, and heated to 70°C, heat preservation reaction for 6h, after cooling to 60°C, add 40g dihydroxypolydimethylsiloxane, 4g toluene, 0.6g dibutyltin dilaurate, and heat to 70°C, keep wa...

example 2

[0032]Take 180g of water glass, 35g of polyoxypropylene triol, and 12g of neopentyl glycol, put them into a high-pressure reactor, seal and evacuate until the vacuum in the reactor is 500Pa, then heat to 110°C for dehydration for 2 hours, and cool to room temperature To obtain a pretreatment solution, add 1.2g of dibutyltin dilaurate, 1g of silane coupling agent, and 0.4g of surfactant to the pretreatment solution, and stir at 350r / min for 25min to obtain component A, which is packed in polyoxypropylene triol. Put it into a high-pressure reaction kettle, seal and evacuate until the vacuum degree in the reaction kettle is 500Pa, then heat to 110°C for dehydration treatment for 2 hours, and cool to 65°C to obtain dehydration-treated polyoxypropylene triol. Take 50g of dehydration-treated polyoxypropylene triol Alcohol, 80g diphenylmethane diisocyanate, and heated to 75°C, heat preservation reaction for 7h, after cooling to 65°C, add 50g dihydroxypolydimethylsiloxane, 5g toluene, ...

example 3

[0034] Take 200g of water glass, 40g of polyoxypropylene triol, and 15g of neopentyl glycol, put them into a high-pressure reactor, seal and evacuate until the vacuum in the reactor is 1000Pa, then heat to 120°C for dehydration for 3 hours, and cool to room temperature To obtain the pretreatment solution, add 1.5g dibutyltin dilaurate, 2g silane coupling agent, 0.5g surfactant to the pretreatment solution, stir at 400r / min for 30min to obtain component A, take polyoxypropylene triol Put it into a high-pressure reaction kettle, seal and evacuate until the vacuum degree in the reaction kettle is 1000Pa, then heat to 120°C for dehydration treatment for 3 hours, and cool to 70°C to obtain dehydration-treated polyoxypropylene triol, take 60g of dehydration-treated polyoxypropylene triol Alcohol, 90g diphenylmethane diisocyanate, and heated to 80°C, heat preservation reaction for 8h, after cooling to 70°C, add 60g dihydroxypolydimethylsiloxane, 6g toluene, 0.8g dibutyltin dilaurate, ...

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Abstract

The invention relates to a polyurethane-water glass composite grouting material and a preparation method thereof, which belong to the technical field of construction materials. With lower viscosity and surface tension and high infiltration capability, silane coupling agent utilized by the invention can be rapidly spread on a constructed surface to infiltrate into cracks of a rock surface; meanwhile, inorganic groups in the silane coupling agent can react with oxide on the surfaces of the cracks to generate stable silicon-oxygen bonds, and the organic groups and NCO react to be connected onto organic macromolecules, so that the bonding strength and constructed surface infiltration of the grouting material are improved, meanwhile, a catalyst component is promoted to be uniformly dispersed into water glass, phase separation is prevented, the groutability is good, the permeability is high, and moreover, the polyurethane-water glass composite grouting material has good compressive strength;and the polyurethane-water glass composite grouting material can play the role of filling, reinforcement, waterproofing, leaking stoppage and the like for rock-soil / gravel structures, and is applicable to waterproofing and leaking stoppage for cracks and reinforcement and seepage resistance for foundations in bridges, subways, dams, rock strata, harbors, civil air defence works and the like.

Description

technical field [0001] The invention relates to a polyurethane water glass composite grouting material and a preparation method thereof, belonging to the technical field of construction materials. Background technique [0002] In recent years, my country's underground engineering and tunnel construction have developed rapidly, and the number and length of cross-mountain railways and highway tunnels built rank first in the world; large cities also vigorously build subways to solve traffic congestion problems; in order to meet my country's production and life needs for coal resources demand, and the mining of coal has also gradually intensified." All of the above will face the problem of surface water and groundwater gushing through various channels such as cracks, faults, and subsidence areas, causing floods in tunnels and mines, and affecting tunnel construction and operation. Mining production, etc. pose threats, but also bring huge economic losses. Various tunnels and underg...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/66C08G18/48C08G18/61C08G18/32C08G18/12C08K3/34C08K5/12
CPCC08G18/12C08G18/3206C08G18/4829C08G18/61C08G18/6674C08K3/34C08K5/12
Inventor 徐冬王文新史玉玲
Owner 徐冬
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