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Two component spray polyurea waterproof paint and preparation method and construction method of same

A waterproof coating, two-component technology, applied in antifouling/underwater coatings, polyurea/polyurethane coatings, coatings, etc., can solve the problem of not being able to form a good appearance, and liquid materials cannot effectively wet and penetrate the substrate and other issues, to achieve the effect of good appearance, excellent aging resistance and simple process

Active Publication Date: 2009-09-16
中建材苏州防水研究院有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the aging resistance of aliphatic sprayed polyurea materials has been improved to a certain extent, due to the rapid gelation and curing of the coating, the liquid material cannot effectively wet and penetrate the substrate, and cannot form a good appearance.

Method used

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  • Two component spray polyurea waterproof paint and preparation method and construction method of same
  • Two component spray polyurea waterproof paint and preparation method and construction method of same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] The two-component spray polyurea waterproof coating according to this embodiment includes A component and B component. The raw material system formula of component A is 55 parts (by weight) of isophorone diisocyanate, 35 parts of polypropylene glycol ether and 10 parts of hydroxyl-terminated polymethylsilane; the raw material system formula of component B includes 50 parts of amino-terminated polyether D-2000, 30 parts of amine chain extender Jeffling TM 754 and 20 parts of amino-terminated polymethylsilane.

[0030] The preparation method of above-mentioned waterproof coating is as follows:

[0031] (1) Preparation of component A: put 35 parts of polypropylene glycol ether (hydroxyl value 56KOHmg / g) and 10 parts of hydroxyl-terminated polymethylsilane into the reaction kettle and start stirring while raising the temperature to 110±5°C, vacuum pressure Dehydrate at -0.08MPa for 2h, then fill with nitrogen protection, cool down to 70°C, add 55 parts of isophorone dii...

Embodiment 2

[0035] The two-component spray polyurea waterproof coating according to this embodiment includes A component and B component. The raw material system formula of component A is: 45 parts of hexamethylene diisocyanate, 40 parts of polyethylene glycol ether and 15 parts of hydroxyl-terminated polymethylsilane; the raw material system formula of component B is 55 parts of amino-terminated polyether Jeffamine D-400, 35 parts amine chain extender Versalink TM 1000 and 20 parts of amino-terminated polymethylsilane.

[0036]The preparation method of above-mentioned waterproof coating is as follows:

[0037] (1) Preparation of component A: Put 40 parts of polyethylene glycol ether (hydroxyl value 56KOHmg / g) and 15 parts of hydroxyl-terminated polymethylsilane into the reactor and start stirring while heating up to 110±5°C. Dehydrate under vacuum pressure -0.08MPa for 2h. Fill with nitrogen protection, lower the temperature to 70°C, add 45 parts of hexamethylene diisocyanate, stir ...

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Abstract

The invention relates to a two component spray polyurea waterproof paint and a preparation method and a construction method of the same. The waterproof paint comprises a component A and a component B, wherein by weight portion, the raw material system of the component A comprises 40 to 60 portions of polyisocyanates, 30 to 45 portions of polyether polyols, 5 to 15 portions of hydroxy silicone oil; and the raw material system of the component B comprises 35 to 60 portions of amino terminated polyethers, 20 to 45 portions of amine chain extenders and 5 to 20 portions of amino silicone oil. Waterproof materials made of the waterproof paint have the combined high performance of a polyurea elastomer and an organosilicon material, high overall physical properties, excellent color retention and ultraviolet radiation resistance, can be used in waterproofing work exposed in atmospheric environment, and are particularly applicable to waterproof coatings of roads and bridges on a passenger special line. The preparation method of the waterproof paint has the advantages of simple process and environmental protection. The construction method of the waterproof paint can allow the paint to moisten and penetrate into substrate materials effectively from the surfaces of the substrate materials, so that the waterproof coatings have better appearance.

Description

technical field [0001] The invention relates to a two-component spray polyurea waterproof coating, in particular to a coating suitable for the waterproof coating of bridges for passenger dedicated lines. The invention also relates to a preparation method and a construction method of the waterproof coating. Background technique [0002] The two-component spray polyurea waterproof coating is a 100% solid content spray material, which uses the -NCO of the A component and the -NH of the B component 2 It is solidified into a film by the reaction between them, and is applied by two-component mixed spraying. It has the advantages of water resistance, oil resistance, corrosion resistance, aging resistance, wear resistance, fast construction speed and high strength. [0003] In the prior art, polyurea waterproof coatings are mainly based on aromatic sprayed polyurea elastomers, and traditional sprayed polyurea elastomers use aromatic isocyanates (TDI, MDI, PAPI) as main raw materials...

Claims

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Application Information

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IPC IPC(8): C09D175/02C09D5/16C08G18/72C08G18/66
Inventor 沈春林褚建军康杰分王玉峰杨炳元杨乃浩
Owner 中建材苏州防水研究院有限公司
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