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Two-component polyurethane construction sealant

A two-component polyurethane and sealing paste technology, used in polyurea/polyurethane adhesives, adhesive types, adhesive additives, etc., can solve problems such as poor alkali resistance and water resistance, and achieve excellent aging resistance and construction. easy effect

Active Publication Date: 2015-12-30
广西象州天华科技防水材料有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This type of sealant has high tensile strength, excellent elasticity, abrasion resistance, oil resistance and cold resistance, etc., but poor water resistance, especially alkali water resistance

Method used

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  • Two-component polyurethane construction sealant
  • Two-component polyurethane construction sealant
  • Two-component polyurethane construction sealant

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] The two-component polyurethane building sealant is made of two components A and B, and each component is made of the following raw materials in parts by weight:

[0022] A component: 28 parts of diethylphenyl diisocyanate;

[0023]

[0024] The mass ratio of component A to component B is 1:1. Mix evenly and start construction.

[0025] The relative molecular mass of the polyoxypropylene triol is 3200; the relative molecular mass of the polypropylene glycol alkyl ether is 3200.

[0026] The preparation method of component B is: now add polyoxypropylene triol, polypropylene glycol alkyl ether, polymethyl methacrylate and ethyl acetate into the reaction kettle according to the above ratio, heat up and stir, and then add polytetrafluoroethylene in sequence , carbon black and sodium silicate, heat up to 90°C, turn on the vacuum pump for dehydration, keep the vacuum above 520mm mercury column, stir and dehydrate for more than 1 hour, cool down to 80°C, then add aluminum s...

Embodiment 2

[0028] The two-component polyurethane building sealant is made of two components A and B, and each component is made of the following raw materials in parts by weight:

[0029] A component: 22 parts of diethylphenyl diisocyanate;

[0030]

[0031] The mass ratio of component A and component B is 1:1.3 and mixed evenly, then it can be applied.

[0032] The relative molecular mass of the polyoxypropylene triol is 3500; the relative molecular mass of the polypropylene glycol alkyl ether is 2800.

[0033] The preparation method of component B is: now add polyoxypropylene triol, polypropylene glycol alkyl ether, polymethyl methacrylate and ethyl acetate into the reaction kettle according to the above ratio, heat up and stir, and then add polytetrafluoroethylene in sequence , carbon black and sodium silicate, heat up to 85°C, turn on the vacuum pump for dehydration, keep the vacuum above 520mm mercury column, stir and dehydrate for more than 1 hour, cool down to 80°C, then add a...

Embodiment 3

[0035] The two-component polyurethane building sealant is made of two components A and B, and each component is made of the following raw materials in parts by weight:

[0036] A component: 16 parts of diethylphenyl diisocyanate;

[0037]

[0038]

[0039] The mass ratio of component A and component B is 1:1.4 and mixed evenly, then it can be applied.

[0040] The relative molecular mass of the polyoxypropylene triol is 3700; the relative molecular mass of the polypropylene glycol alkyl ether is 2500.

[0041] The preparation method of component B is: now add polyoxypropylene triol, polypropylene glycol alkyl ether, polymethyl methacrylate and ethyl acetate into the reaction kettle according to the above ratio, heat up and stir, and then add polytetrafluoroethylene in sequence , carbon black and sodium silicate, heat up to 90°C, turn on the vacuum pump for dehydration, keep the vacuum above 520mm mercury column, stir and dehydrate for more than 1 hour, cool down to 80°C...

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Abstract

The invention relates to the technical field of building materials, in particular to a two-component polyurethane construction sealant. The two-component polyurethane construction sealant is prepared from a component A and a component B, wherein the component A and the component B are prepared from raw materials in parts by weight as follows: component A is prepared from diethylphenyl diisocyanate; the component B is prepared from polyoxypropylene triol, polypropylene glycol-alkyl ether, polytetrafluoroethylene, carbon black, polymethyl methacrylate, sodium silicate, ferric chloride, aluminum phosphate and ethyl acetate. The two-component polyurethane construction sealant has the advantages of high water resistance, high ageing resistance, good viscosity and long storage life.

Description

technical field [0001] The invention relates to the technical field of building materials, in particular to a two-component polyurethane building sealant. Background technique [0002] Two-component polyurethane sealant is widely used in the connection of building materials such as civil construction industry, transportation industry, concrete prefabricated parts and filling and sealing of construction joints. Advanced roads, bridges, airstrips, underground pipes, joint sealing at joints, and sealing of expansion joints and deformation joints in tunnels and buildings. Two-component polyurethane building sealant is a two-component reaction curing type, consisting of two components, A and B. A component is a milky white or light yellow viscous polyurethane prepolymer, and B component is a black paste or liquid formed by mixing and dehydrating curing agent and auxiliary agent. After curing, it has certain elasticity and cohesiveness. This type of sealant has high tensile stre...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J175/08C09J11/04C09J11/08C09K3/10C08G18/48
Inventor 黄志强王继发刘泓铭
Owner 广西象州天华科技防水材料有限责任公司
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