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One-component polyurethane waterproof coating and preparation method thereof

A polyurethane waterproof, one-component technology, applied in polyurea/polyurethane coatings, coatings, etc., can solve the problems of poor weather resistance and water resistance, low bonding strength, easy foaming of the coating film, etc., to reduce foaming The effect of drumming, high bonding strength, and excellent bonding performance

Active Publication Date: 2022-08-05
荆门科顺新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The bonding strength of traditional one-component polyurethane waterproof coatings with cement substrates is not high during use. Under the long-term action of outdoor environmental conditions such as ultraviolet rays and rain, the coating film is easy to foam and bulge. Its weather resistance and poor water resistance

Method used

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  • One-component polyurethane waterproof coating and preparation method thereof
  • One-component polyurethane waterproof coating and preparation method thereof
  • One-component polyurethane waterproof coating and preparation method thereof

Examples

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preparation example Construction

[0073] A second aspect of the embodiments of the present application provides a method for preparing a one-component polyurethane waterproof coating, comprising:

[0074] The first slurry is obtained by mixing the organosilicon double-ended diol, the organosilicon single-ended diol and the filler;

[0075] adding an additive whose main raw material is diisocyanate to the first slurry and reacting for a first preset time to obtain a polyurethane prepolymer;

[0076] A silane end-capping agent and a tackifier are added to the polyurethane prepolymer and reacted for a second preset time to obtain a one-component polyurethane waterproof coating.

[0077] In some embodiments, the molecular weight of the organosilicon double-ended diol in the above preparation method can be selected as 1000-4000, and its molecular structure is shown in the following formula (3):

[0078]

[0079] In formula (3), R1 is an alkyl group; preferably, n is 8 to 50; more preferably, the organosilicon d...

Embodiment 1

[0104] A one-component polyurethane waterproof coating, the proportions of raw materials are as follows: tech-2120, 26 parts by weight; tech-2176, 12 parts by weight; diisononyl phthalate, 6 parts by weight; talc, 26 parts by weight ; Fumed silica, 10 parts by weight; IPDI (isophorone diisocyanate), 6 parts by weight; HDI trimer (hexamethylene diisocyanate trimer), 2 parts by weight; Neopentyl glycol, 1.2 parts by weight; γ-isocyanatopropyltriethoxysilane, 16 parts by weight; tackifier, 2 parts by weight; stannous octoate, 0.2 parts by weight; propylene glycol methyl ether acetate, 8 parts by weight.

Embodiment 2

[0106]A one-component polyurethane waterproof coating, the proportions of raw materials are as follows: tech-2120, 23 parts by weight; tech-2176, 14 parts by weight; diisononyl phthalate, 6 parts by weight; talc, 25 parts by weight ; Fumed silica, 12 parts by weight; IPDI (isophorone diisocyanate), 6 parts by weight; HDI trimer (hexamethylene diisocyanate trimer), 2.5 parts by weight; Neopentyl glycol, 1.2 parts by weight; γ-isocyanatopropyltriethoxysilane, 16 parts by weight; tackifier, 2 parts by weight; stannous octoate, 0.2 parts by weight; propylene glycol methyl ether acetate, 8 parts by weight.

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Abstract

The present application discloses a one-component polyurethane waterproof coating and a preparation method thereof. The main raw materials of the one-component polyurethane waterproof coating are as follows: organosilicon double-end diol, 100 parts by weight; organosilicon single-end diol, 28-47 parts by weight; diisocyanate, 27-28 parts by weight; silane end-capping agent, 55.5-73 parts by weight; tackifier, 5.5-10 parts by weight; tackifier includes silicone oligomer, epoxy resin and The reaction product of a secondary aminosilane reaction. The one-component polyurethane waterproof coating provided by this application introduces a silane end-capping agent and a tackifier, which can realize the product has excellent weather resistance and water immersion resistance, and the construction coating film does not foam, which solves the problem of the traditional one-component polyurethane waterproof coating. Poor adhesion to cement substrates and poor water resistance.

Description

technical field [0001] The present application relates to the technical field of waterproof coatings, in particular to a one-component polyurethane waterproof coating and a preparation method thereof. Background technique [0002] One-component polyurethane waterproof coating has the characteristics of excellent overall waterproof effect, excellent mechanical properties, good low temperature flexibility, and convenient use. As a new type of waterproof coating, it is widely used in the field of building waterproofing. The traditional one-component polyurethane waterproof coating has low bonding strength with the cement substrate during use. Under the long-term action of outdoor environmental conditions such as ultraviolet rays and rainwater, the coating film is easy to foam and bulge, and its weather resistance and Poor water resistance. SUMMARY OF THE INVENTION [0003] In view of this, the present application provides a one-component polyurethane waterproof coating with ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D175/04C09D7/61C09D7/65C09D7/63
Inventor 何宏林陈立义
Owner 荆门科顺新材料有限公司
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