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Solvent-free single-component polyurethane waterproof coating and preparation method thereof

A polyurethane waterproof, one-component technology, applied in the field of coatings, can solve the problems of rising coating viscosity and unfavorable construction, and achieve the effects of improving viscosity, convenient construction and smooth surface

Active Publication Date: 2020-04-03
上海凯矜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

In 2017, the Beijing-Tianjin-Hebei region and the Shenzhen region first issued regional standards for VOC of polyurethane coatings. The Beijing-Tianjin-Hebei region requires polyurethane coatings to meet VOC ≤ 100g / L ， The Shenzhen area requires polyurethane coatings to meet VOC ≤ 150L, ​​while the existing standard requires VOC ≤ 200g / L. Reducing the amount of solvent to meet environmental protection standards will lead to an increase in the viscosity of the coating, which is not conducive to construction
The method includes the ratio of raw materials and the production process. The solvent-free one-component polyurethane waterproof coating prepared by the method of the invention is characterized by no pollution, convenient construction, and belongs to a waterproof material that meets environmental protection requirements. However, the waterproof effect of the coating is and mechanical properties need to be further improved

Method used

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  • Solvent-free single-component polyurethane waterproof coating and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] This embodiment provides a solvent-free one-component polyurethane waterproof coating, which includes the following components in parts by weight: 35 parts of mixed polyether polyols, 12 parts of diphenylmethane diisocyanate, 9 parts of hexamethylene diisocyanate, three 15 parts of glycerol acetate, 12 parts of acetyl tributyl citrate, 5 parts of 1-butyl-3-methylimidazolium dicyanamide salt, 30 parts of calcium oxide, 20 parts of titanium dioxide, 1 part of single-layer graphene , 0.5 parts of dibutyltin silicate catalyst in February;

[0020] The mixed polyether polyol is a mixture of polyether DL-2000D, polyether EP-330N and hydroxyl-terminated polybutadiene R-15M, and the mass ratio of the three is 3:2:0.8; the mixed polyether polyol The hydroxyl value of alcohol is 0.43; the molecular weight of the hydroxyl-terminated polybutadiene prepolymer is 2213Mn, and the hydroxyl value is 0.51; the dibutyltin dilaurate catalyst is the glycerol triacetate solution of dibutylti...

Embodiment 2

[0028] This embodiment provides a solvent-free one-component polyurethane waterproof coating, comprising the following composition in parts by weight: 50 parts of mixed polyether polyols, 10 parts of diphenylmethane diisocyanate, 10 parts of hexamethylene diisocyanate, three 20 parts of glycerol acetate, 15 parts of acetyl tributyl citrate, 8 parts of 1-butyl-3-methylimidazolium dicyanamide salt, 40 parts of calcium oxide, 15 parts of titanium dioxide, 2 parts of single-layer graphene , 1 part of dibutyltin silicate catalyst in February;

[0029] The mixed polyether polyol is a mixture of polyether DL-2000D, polyether EP-330N and hydroxyl-terminated polybutadiene R-15M, and the mass ratio of the three is 3:2:0.6; the mixed polyether polyol The hydroxyl value of alcohol is 0.42; The molecular weight of the hydroxyl-terminated polybutadiene prepolymer is 2213Mn, and the hydroxyl value is 0.51; The dibutyltin dilaurate catalyst is the glycerol triacetate solution of dibutyltin di...

Embodiment 3

[0032]This embodiment provides a solvent-free one-component polyurethane waterproof coating, comprising the following components in parts by weight: 40 parts of mixed polyether polyols, 12 parts of diphenylmethane diisocyanate, 8 parts of hexamethylene diisocyanate, three 18 parts of glycerol acetate, 12 parts of acetyl tributyl citrate, 5 parts of 1-butyl-3-methylimidazolium dicyanamide salt, 30 parts of calcium oxide, 20 parts of titanium dioxide, 3 parts of single-layer graphene , 0.8 parts of dibutyltin silicate catalyst in February;

[0033] The mixed polyether polyol is a mixture of polyether DL-2000D, polyether EP-330N and hydroxyl-terminated polybutadiene R-15M, and the mass ratio of the three is 3:2:1; the mixed polyether polyol The hydroxyl value of alcohol is 0.44; the molecular weight of the hydroxyl-terminated polybutadiene prepolymer is 2213Mn, and the hydroxyl value is 0.51; the dibutyltin dilaurate catalyst is the glycerol triacetate solution of dibutyltin dila...

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Abstract

The invention belongs to the technical field of coatings, in particular to a solvent-free single-component polyurethane waterproof coating. The coating is prepared from the following components in parts by weight: 30 to 60 parts of mixed polyether polyol; 5 to 15 parts of diphenylmethane diisocyanate; 7 to 15 parts of hexamethylene diisocyanate, 10 to 24 parts of glycerol triacetate, 8 to 16 partsof acetyl tributyl citrate, 3 to 8 parts of 1-butyl-3-methylimidazolium dicyandiamide salt, 20 to 50 parts of calcium oxide, 10 to 30 parts of titanium dioxide, 1 to 3 parts of single-layer grapheneand 0.2 to 1 part of dibutyltin dilaurate catalyst. The coating has the following beneficial effects: (1) the viscosity of the coating system is improved through the combination of mixed ethers and the adjustment of a plasticizer, so that the purpose of easy film scraping and brushing is achieved, no solvent is added, the coating is more environment-friendly, and the construction is more convenient; (2) the prepared coating is low in water content and long in storage life; and (3) the coating is strong in mechanical property, smooth in surface after construction and more attractive.

Description

technical field [0001] The invention belongs to the technical field of coatings, in particular to a solvent-free one-component polyurethane waterproof coating and a preparation method thereof Background technique [0002] Due to its excellent physical properties and unique waterproof performance, polyurethane waterproof coating has become an important architectural coating in the field of architectural waterproof applications. Most of the polyurethane waterproof coatings currently on the market are solvent-based nets, especially the one-component polyurethane waterproof coatings. Various organic solvents are added to the coating system to reduce the viscosity of the coating and achieve the effect of convenient construction, but the volatilization of organic solvents And inevitably caused VOC pollution. [0003] With the continuous improvement of the country's environmental protection requirements, the control of VOC content is becoming more and more stringent. Polyurethane ...

Claims

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Application Information

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IPC IPC(8): C09D175/14C09D7/61C09D7/63C08G18/69C08G18/48
CPCC08G18/4804C08G18/698C08K2003/2206C08K2003/2241C09D175/14C09D7/61C09D7/63C08K13/02C08K3/042C08K3/22C08K5/11
Inventor 匡礼彬金幺娥
Owner 上海凯矜新材料科技有限公司
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