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High-temperature resistant water spray coating polyurea flexible composition, preparation, construction method and uses thereof

A composition and high-temperature-resistant technology, applied in polyurea/polyurethane coatings, coatings, anti-corrosion coatings, etc., can solve the problems of limited application range, poor high-temperature water resistance, etc., to enhance mechanical properties and improve high-temperature water resistance , Improve the effect of mixing degree

Inactive Publication Date: 2009-02-18
MARINE CHEM RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The invention provides a polyurea flexible composition for spraying with high temperature resistant water and its preparation, construction method and application, which can solve the problem that the polyurea elastomer in the prior art has poor high temperature water resistant performance and its application range is limited question

Method used

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  • High-temperature resistant water spray coating polyurea flexible composition, preparation, construction method and uses thereof
  • High-temperature resistant water spray coating polyurea flexible composition, preparation, construction method and uses thereof
  • High-temperature resistant water spray coating polyurea flexible composition, preparation, construction method and uses thereof

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Effect test

Embodiment 1

[0041] Several typical examples are given below, but the present invention is not limited to the following examples.

[0042] According to the method specified in GB / T 1690-1992, soak the polyurea coating in water at 80°C for 21 days, take out the sample, place it at room temperature for 30 minutes, wipe off the liquid on the surface of the sample with filter paper, and perform mechanical tests on the sample. Performance Testing.

[0043] Take the average value of three samples as the measurement result.

[0044] The mass units of various substances in the following examples are Kg; MDI-50 wherein is 50% 4,4'-diphenylmethane diisocyanate and 50% 2,4'-diphenyl Composition of methyl methane diisocyanate.

[0045] Example 1:

[0046] Synthesize 54.5 parts of MDI-50 and 45.5 parts of polyoxypropylene ether glycol 210 according to the process of the present invention to obtain a prepolymer with an NCO% of 14.5%, which is component A. The R component is composed of 10 parts of J...

Embodiment 2

[0048] Synthesize 49.5 parts of MDI-50 and 50.5 parts of polyoxypropylene ether glycol 220 according to the process of the present invention to obtain a prepolymer with an NCO% of 14.5%, which is component A. The R component is composed of 10 parts of JEFFAMINE T-5000, 64 parts of JEFFAMINE D-2000, 25 parts of diethyltoluenediamine (DETDA), 0.5 part of Irganox 1076 and 0.5 part of Tinuvin 328, and the ratio of A and R components is 1: 1 (volume ratio), spray to form polyurea flexible material.

Embodiment 3

[0050] Synthesize 54.5 parts of MDI-50 and 45.5 parts of polytetrahydrofuran polyol PolyTHF1000 according to the process of the present invention to obtain a prepolymer with an NCO% of 14.5%, which is component A. The R component is composed of 10 parts of JEFFAMINET-5000, 64 parts of JEFFAMINE D-2000, 25 parts of diethyltoluenediamine (DETDA), 0.5 part of Irganox1076 and 0.5 part of Tinuvin 328, A and R components are 1:1 ( volume ratio), spraying to form polyurea flexible material.

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Abstract

The invention provides a high temperature resistant water spray polyurea elastic combination, a preparation and construction method and an applications thereof. The high temperature resistant water spray polyurea elastic combination solves the problem that the high temperature resistance and the water resistance of the prior art are poor, and the scope of application is limited. In the technical proposal, the high temperature resistant water spray polyurea elastic combination comprises a component A and a component R; the component A is a semi-prepolymer which is synthesized by using 35 to 65 portions of polyisocyanates and 35 to 65 portions of polyhydric alcohol; the component R comprises 20 to 50 portions of amine chain extenders and 45 to 80 portions of amine-terminated polyethers. The component A and the component R are used according to the isocyanate index of 1.1. By adopting the high temperature resistant water spray polyurea elastic combination, not only the high temperature resistance and the water resistance of the polyurea elastomer are improved; but also the miscibility and the mechanical property of the material are improved as a whole.

Description

technical field [0001] The invention belongs to the technical field of polyurea elastomers, and in particular relates to a high-temperature-resistant water-sprayed polyurea flexible composition and its preparation, construction method and application. Background technique [0002] Spray polyurea elastomer technology uses amine-terminated polyether and amine chain extender as the active hydrogen component, which has high activity when reacting with isocyanate, and can be quickly cured and molded at room temperature without a catalyst. Compared with the traditional environment-friendly coating technology, spraying polyurea elastomer technology has the advantages of solvent-free, fast curing, insensitive to temperature and humidity, excellent physical and chemical properties, high temperature resistance, and aging resistance. Therefore, as soon as the technology came out, it has developed rapidly. [0003] Polyurea elastomers have been widely used in the fields of petrochemica...

Claims

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Application Information

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IPC IPC(8): C09D175/02C09D5/08B05D1/02B05D7/24B05D3/00
Inventor 陈酒姜宋庆功卢敏
Owner MARINE CHEM RES INST
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