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Monocomponent polyurethane waterproof paint and preparation method thereof

A polyurethane waterproof, one-component technology, applied in the field of coatings, can solve the problems of two-component coatings construction trouble, environmental protection threats, affecting the waterproof effect, etc., to achieve good chemical storage stability, small elongation, and improved workability. Effect

Inactive Publication Date: 2014-10-08
STATE GRID CORP OF CHINA +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the existing solvent-free one-component asphalt-based polyurethane waterproof coating avoids the problem of troublesome construction of two-component coatings, it still poses a threat to environmental protection because it is based on asphalt.
In addition, the existing one-component waterproof coating is cured by moisture absorption, and the curing time is long. In the thick coating, it is easy to generate air bubbles and affect the waterproof effect.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Embodiment 1. A kind of one-component polyurethane waterproof paint, comprises the component of following weight part:

[0028] 200 parts of a mixture of polyoxypropylene diol (N-220) and polyoxypropylene triol (N-330) in a ratio of 8:1, 100 parts of toluene diisocyanate (TDI), 60 parts of organic solvent, 240 parts of filler, 30 parts of defoamer, 200 parts of plasticizer, 50 parts of dispersant, and 5 parts of catalyst.

[0029] The preparation method is:

[0030] (1) Add polyether polyol to plasticizer and dispersant, stir evenly and heat to 75°C-80°C;

[0031] (2) Slowly add fillers and pigments, stir evenly, heat up to 115°C-120°C, and dehydrate for 2.5h under vacuum-0.08MPa--0.09MPa;

[0032] (3) Add 2 / 3 of the organic solvent after dehydration and cool down to 75°C-80°C, then add TDI and stir for 2-2.5 hours at normal pressure and 80°C-85°C;

[0033] (4) Add catalyst, defoamer and curing agent, stir evenly and keep warm at 105°C-110°C for 1.5h;

[0034] (5) C...

Embodiment 2

[0035] Embodiment 2. A kind of one-component polyurethane waterproof coating, comprises the component of following parts by weight: polyoxypropylene diol (N-220) and polyoxypropylene triol (N-330) mix according to the ratio of 10:1 Mixture 300 parts, TDI 200 parts, organic solvent 100 parts, filler 400 parts, defoamer 50 parts, plasticizer 250 parts, dispersant 80 parts, catalyst 10 parts.

[0036] The preparation method is the same as in Example 1.

Embodiment 3

[0037] Embodiment 3. A kind of one-component polyurethane waterproof coating, comprises the component of following parts by weight: polyoxypropylene diol (N-220) and polyoxypropylene triol (N-330) mix according to the ratio of 9:1 250 parts of mixture, 150 parts of TDI, 70 parts of organic solvent, 300 parts of filler, 40 parts of defoamer, 230 parts of plasticizer, 60 parts of dispersant, and 8 parts of catalyst.

[0038] The preparation method is the same as in Example 1.

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PUM

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Abstract

The invention provides a monocomponent polyurethane waterproof paint and a preparation method thereof. The monocomponent polyurethane waterproof paint comprises the following components in parts by weight: 200 to 300 parts of polyether polyol, 100 to 200 parts of toluene diisocyanate (TDI), 60 to 100 parts of organic solvent, 240 to 400 parts of filling material, 30 to 50 parts of defoaming agent, 200 to 250 parts of plasticizer, 50 to 80 parts of dispersing agent and 5 to 10 parts of catalyst. The monocomponent polyurethane waterproof paint is nontoxic, free of pollution, high in curing speed, short in construction period, low in cost and good in paintcoat performance.

Description

technical field [0001] The invention relates to a coating, in particular to a one-component polyurethane waterproof coating and a preparation method thereof. Background technique [0002] Polyurethane waterproof coating has become one of the fastest-growing varieties in the global coating industry in the past ten years due to its excellent product performance and processing diversity. The average annual growth rate of polyurethane in foreign countries has reached twice the average growth rate of the coatings industry. In my country, the annual output of polyurethane coatings has exceeded 200,000 tons, accounting for about 8-10% of the total production of coatings in the country. The 3rd place in the total amount of paint. [0003] At present, polyurethane waterproof coatings have been widely recognized and applied in the waterproof industry because of their superior physical and chemical properties. Polyurethane waterproof coatings can be divided into one-component and two-...

Claims

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Application Information

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IPC IPC(8): C09D175/08C09D7/12C08G18/48
Inventor 周金宝牟泽刚汪培月崔立勇廉磊朱秀杰
Owner STATE GRID CORP OF CHINA
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