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Organosilicone emulsion-silica gel permeable crystallization type waterproof material and preparation method thereof

A silicone emulsion and waterproof material technology, which is applied in the field of construction engineering materials, can solve the problems of poor substrate adhesion, reduced waterproof effect, and high volatility, and achieve the effects of low cost, improved surface strength, and excellent waterproof performance

Active Publication Date: 2014-12-24
QINGDAO TECHNOLOGICAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, silicone waterproof materials also have some defects, such as low strength, poor adhesion to the substrate, high volatility, and gradual decrease in waterproof effect over time, etc.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0030] The present invention also provides a preparation method of the above-mentioned waterproof material, specifically:

[0031] In the first step, the silica sol and the silane coupling agent are mixed and then added to the reactor for reaction to obtain the first reactant;

[0032] In the second step, part of the water, emulsifier and defoamer are mixed and then added to the reactor for reaction to obtain the second reactant;

[0033] In the third step, the organic silicon monomer and a small amount of water are added to the reactor for reaction, and then the second reactant obtained in the second step is added for further reaction to obtain a silicone emulsion;

[0034] In the fourth step, the reactant obtained in the first step is added to the silicone emulsion obtained in the third step, and the reaction is stirred to prepare the silicone emulsion-silica sol infiltrated crystalline waterproof material.

[0035] The first step is further specifically mixing the silica s...

Embodiment 1

[0044] In this example, 1 kg of silica sol-organosilicon monomer permeated crystalline waterproof material was prepared. The raw materials used and the preparation process are as follows:

[0045] 1) Mix 200g of silica sol prepared by hydrolysis of tetraethyl orthosilicate with 85g of γ-aminopropyltriethoxysilane, add it to the reaction kettle, stir at room temperature at a speed of 400r / min for 1 hour, take it out and wait for use.

[0046] 2) Mix 70g of water, 70g of fatty alcohol polyoxyethylene ether and 20g of defoamer polyether modified silicone defoamer, add to the reactor, adjust the temperature to 40-60°C, and stir at 400r / min for 1 hour , take it out for use;

[0047] 3) Add 500g of n-butyltriethoxysilane monomer and 40g of water into the reaction kettle, stir at room temperature at a speed of 500r / min for 1.5 hours, then adjust the temperature to 50°C and the speed to 3000r / min, the step 2) The obtained reactant is slowly dropped into the reaction kettle, and the ...

Embodiment 2

[0051] In this example, 1 kg of silica sol-organosilicon monomer permeated crystalline waterproof material was prepared. The raw materials used and the preparation process are as follows:

[0052] 1) Mix 180g of silica sol prepared by hydrolysis of tetraethyl orthosilicate with 75g of γ-aminopropyltriethoxysilane, add to the reaction kettle, stir at room temperature at a speed of 400r / min for 1 hour, take out and wait for use.

[0053] 2) Mix 50g of water, 75g of Tween 80 emulsifier and 22g of polyether-modified silicone defoamer, add to the reaction kettle, adjust the temperature to 60°C, stir at 400r / min for 1 hour, and take it out for use;

[0054] 3) Add 550g of isobutyltriethoxysilane monomer and 38g of water into the reaction kettle, stir at room temperature at a speed of 500r / min for 1.5 hours, then adjust the temperature to 50°C and the speed to 3000r / min, the step 2) The obtained reactant is slowly dropped into the reaction kettle, and the stirring is continued for 6...

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Abstract

The invention provides an organosilicone emulsion-silica gel permeable crystallization type waterproof material which is prepared from the following raw materials: an organosilicone monomer, an emulsifier, silica sol, a silane coupling agent, a defoamer, a coalescing agent and water. The waterproof material is excellent in waterproof performance, strong in resistance to harmful ion invasion and excellent in weather ability and durability, so that the surface strength of concrete is improved, and the waterproof material is suitable for surface waterproof treatment of materials such as concrete, mortar, cement paste and stones and particularly suitable for surface treatment of concrete structures in severe environments such as harbor wharfs, roads working under a condition of deicing salt and removing corrosion of salt mist, and flyovers.

Description

technical field [0001] The invention relates to the technical field of construction engineering materials, in particular to an organosilicon emulsion-silica sol infiltration crystalline waterproof material and a preparation method thereof. Background technique [0002] Concrete is the most widely used and used building material in modern civil engineering. Among building materials and structures, reinforced concrete is relatively durable. Under normal circumstances, properly prepared and well-maintained concrete can achieve long-term use. However, if the concrete is exposed to harsh environmental conditions and not adequately protected, the concrete will fail prematurely. [0003] In the process of physical damage and chemical erosion of concrete structures, water plays a very important role, which can generally be divided into three aspects: (1) water as a solvent, the hydration product of cement Ca(OH) 2 And C-S-H gel etc. dissolve gradually, and its dissolution rate re...

Claims

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Application Information

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IPC IPC(8): C04B41/50
Inventor 李绍纯赵铁军金祖权耿永娟张馨元
Owner QINGDAO TECHNOLOGICAL UNIVERSITY
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