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Self-healing polyurethane waterproof coating and preparation method thereof

A polyurethane waterproofing and coating technology, applied in polyurea/polyurethane coatings, wax coatings, coatings, etc., can solve the problems of weak waterproof coating strength and inability to be used in combination, and achieve high solid content, good self-healing properties, and adhesion powerful effect

Active Publication Date: 2020-04-28
大禹九鼎新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the polyurethane waterproof coating of the prior art still has the following problems: it cannot be used in combination with existing coils, and the strength of the non-cured rubber asphalt waterproof coating is weak.

Method used

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  • Self-healing polyurethane waterproof coating and preparation method thereof
  • Self-healing polyurethane waterproof coating and preparation method thereof
  • Self-healing polyurethane waterproof coating and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0058] See Table 1 for the proportions of the raw materials of the self-healing polyurethane waterproof coating in this example.

[0059] The raw material composition of table 1 embodiment 1 self-healing polyurethane waterproof coating

[0060]

[0061]

Embodiment 2

[0063] Table 2 shows the raw material component ratio of the self-healing polyurethane waterproof coating in this example.

[0064] The raw material composition of table 2 embodiment 2 self-healing polyurethane waterproof coating

[0065]

Embodiment 3

[0067] The proportions of the raw materials of the self-healing polyurethane waterproof coating in this example are shown in Table 3.

[0068] The raw material composition of table 3 embodiment 3 self-healing polyurethane waterproof coating

[0069]

[0070]

[0071] The preparation method of the self-healing polyurethane waterproof coating of embodiments 1-3 is as follows:

[0072] Preparation process of component A: According to the compositions in Tables 1 to 3, add terpene phenolic resin, chlorinated paraffin, poly-1,4-butanediol adipate diol HKP-456, and polyether triol accurately. DL-3000D was heated to (115±2)℃, and vacuumed to (-0.095~-0.1)MPa. After 2 hours, the vacuum was stopped. When the temperature dropped to 70℃, TDI-80 and MDI were added accurately, and the temperature was increased to 80°C, react for 2h, when the temperature is lowered to 70°C, add catalyst T-12, react for 30min, cool down to 60°C and vacuumize to (-0.095~-0.1)MPa, and discharge after 10...

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Abstract

The invention discloses self-healing polyurethane waterproof coating and a preparation method thereof. The self-healing polyurethane waterproof coating comprises a component A and a component B, wherein the component A comprises terpene phenolic resin, a plasticizer, polyester polyol, polyether polyol A, diisocyanate and a catalyst; the component B is prepared from the following components: a plasticizer, asphalt, polyether polyol A, polyether polyol B, filling oil, a filler, a thixotropic agent, a dispersing agent, a chain extender, a defoaming agent and a catalyst; the number-average molecular weight of the polyether polyol A is 2,000 to 4,000; the number-average molecular weight of the polyether polyol B is 300 to 500; the filler is alkaline earth metal hydroxide; the mass ratio of thecomponent A to the component B is 1:(2-4). The self-healing polyurethane waterproof coating disclosed by the invention has the tensile strength of polyurethane coating and the self-healing property ofnon-cured rubber asphalt waterproof coating, and also has the characteristics of excellent adhesion with the existing waterproof coiled material and the like.

Description

technical field [0001] The invention relates to the technical field of waterproof materials, in particular to a self-healing polyurethane waterproof coating and a preparation method thereof. Background technique [0002] The leakage problem of modern buildings is ubiquitous, and building waterproofing has become a common concern in modern construction projects. In particular, modern buildings have higher requirements for waterproof material performance, more comprehensive functions, and no pollution to the environment. [0003] Polyurethane waterproof coating is a relatively common waterproof material. It is mainly a prepolymer containing isocyanate groups formed by addition polymerization of isocyanates, polyethers, etc., together with catalysts, additives, fillers, etc., after mixing Waterproof coating made by process. [0004] In the prior art, CN108276895A discloses a new type of polyurethane non-curing waterproof coating and its production process. The waterproof coat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D175/08C09D191/06C09D7/61C08G18/42C08G18/48C08G18/54
CPCC08G18/4027C08G18/4238C08G18/4804C08G18/542C08K2003/2206C08L2205/035C09D175/08C09D7/61C09D7/70C08L91/06C08L95/00C08K3/22C08K7/26
Inventor 龙木钦
Owner 大禹九鼎新材料科技有限公司
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