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Waterproof material based on polyurea and its preparation method

A waterproof material, polyurea technology, applied in the direction of polyurea/polyurethane coating, coating, etc., can solve the problems of easy aging and unsatisfactory, and achieve the effect of excellent performance, simple and environmentally friendly preparation method

Inactive Publication Date: 2012-05-23
天津市耀新科技发展有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The polyurea waterproof coating mainly made of aromatic sprayed polyurea elastomer uses aromatic isocyanate as the main raw material to synthesize isocyanate prepolymer or semi-prepolymer, and diethyltoluenediamine is used as the chain extender. It is easy to age and cannot meet the requirements of a waterproof surface layer that is exposed to the environment for a long time and requires high color retention

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] (1) Add 70g of xylylene isocyanate into the reaction vessel, flush it with nitrogen for protection, heat to 80°C, add 50g of polyether diol dropwise to it, and keep it at 80°C for 1 hour to react After 1 hour, add 10g of hydroxy silicone oil and continue stirring for 30 minutes, then cool and discharge to obtain component A;

[0022] (2) Add 50g of amino-terminated polyether, 20g of diethyltoluenediamine and 10g of amino silicone oil into the reaction vessel, stir and mix until uniform, and obtain component B;

[0023] (3) The waterproof material can be obtained by directly mixing the two components of A and B.

Embodiment 2

[0025] (1) Add 60g of hexamethyl diisocyanate into the reaction vessel, flush with nitrogen for protection, heat to 85°C, add 50g of polyether diol dropwise to it, and keep it at 85°C for 2 hours hour, then add 15g of hydroxyl silicone oil and continue to stir and react for 40 minutes, cool and discharge to obtain component A;

[0026] (2) Add 55g of amino-terminated polyether, 30g of hexamethylenediamine and 15g of amino silicone oil into the reaction vessel, stir and mix until uniform, and obtain component B;

[0027] (3) The waterproof material can be obtained by directly mixing the two components of A and B.

Embodiment 3

[0029] (1) Add 55g of cyclohexane dimethylene diisocyanate into the reaction vessel, flush it with nitrogen for protection, heat to 85°C, add 55g of polyether triol dropwise therein, and keep it at 80°C for 3 hours. React at ℃ for 1 hour, then add 15g of hydroxy silicone oil and continue to stir and react for 30 minutes, then cool and discharge to obtain component A;

[0030] (2) Add 65g of amino-terminated polyether, 35g of cyclohexanediamine and 5g of amino silicone oil into the reaction vessel, stir and mix until uniform, and obtain component B;

[0031] (3) The waterproof material can be obtained by directly mixing the two components of A and B.

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Abstract

The invention discloses a waterproof material based on polyurea and its preparation method, which comprises a first component and a second component, wherein the first component is a prepolymer formed by reacting polyisocyanates, polyether polyol and hydroxyl silicone oil; and the second component is composed of amine terminated polyether, amine chain extender and amino silicone oil. The components comprise the following ingredients by mass part: 30-70 parts of polyisocyanate, 30-60 parts of polyether polyol, 5-15 parts of hydroxyl silicone oil, 55-65 parts of amine terminated polyether, 20-35 parts of amine chain extender and 5-15 parts of amino silicone oil. Compared with prior art, the invention has the following advantages: organosilicon-containing large molecule is used in the formula, a silicon-oxygen chain structure is stable, the waterproof material has merits of oxidation resistance, water resistance and corrosion resistance. The waterproof material has excellent performance, and can be used for the engineering exposed in atmosphere environment.

Description

technical field [0001] The invention relates to a waterproof material in the field of construction engineering and a preparation method thereof, in particular to a polyurea-based waterproof material and a preparation method thereof. Background technique [0002] With the development of my country's economic construction, there is an urgent need for an advanced waterproof material in the difficult waterproofing of large-scale infrastructure construction such as high-speed railways, subways, tunnels, and water conservancy projects. This kind of waterproof coating should overcome the shortcomings of traditional waterproof materials such as aging resistance, no exposure, low strength, no puncture resistance, high requirements on the construction environment, slow curing, and low work efficiency. [0003] The polyurea waterproof material in the prior art is a material with a 100% solid content, which utilizes the -NCO of the A component and the -NH of the B component 2 It is sol...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/66C08G18/61C08G18/67C08G18/48C08G18/50C08L75/02C09D175/02
Inventor 刘耀俭吕向阳冀耀辉谢辉刘群
Owner 天津市耀新科技发展有限公司
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