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Water-cured polyurethane waterproof coating

A polyurethane waterproof and water-curing technology, used in the field of polyurethane waterproof coatings and environmentally friendly polyurethane waterproof coatings, can solve the problems of rare products on the market and difficult to meet customer needs, and achieve excellent mechanical and chemical properties. Excellent waterproof performance , cost-effective effect

Inactive Publication Date: 2011-09-14
BEIJING ORIENTAL YUHONG WATERPROOF TECH CO LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Water-cured polyurethane waterproof coating is a polyether-type, solvent-free and environmentally friendly high-grade synthetic polymer waterproof coating. Compared with traditional tar-type and petroleum asphalt polyurethane waterproof coatings, it has no solvent volatilization, non-toxic, tasteless, and no pollution during construction. It has the advantages of fast curing and meets the requirements of ecological development and environmental protection. Water is used as the curing agent in the construction of paint, which is obviously different from other single or two-component polyurethane waterproof coatings. It reflects the new thinking of polyurethane waterproof coatings. New technology has broad market prospects, but commercially available products are rare, and it is difficult to meet customer needs

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Add 1253g polyether diol, 210g polyether triol, 853g plasticizer, and 8.4g dispersant to a 5L four-necked reaction flask, heat up to 80°C, add 259g talcum powder and 259g heavy calcium, and heat up to 100 ℃~120℃, vacuum dehydration for 4 hours, lower the temperature below 50℃, add 224g of toluene diisocyanate, heat up slowly, control the temperature at 80~85℃, react under vacuum for 2.5h, lower the temperature at 50~60℃, add defoamer and catalyst , coupling agent, water-absorbing agent, and gas-absorbing agent, stirred for 1 hour, and discharged and sealed to obtain the waterproof coating of the present invention.

Embodiment 2

[0023] Add 1253g polyether diol, 210g polyether triol, 853g plasticizer, and 8.4g dispersant to a 5L four-necked reaction flask, heat up to 80°C, add 259g talcum powder and 259g heavy calcium, and heat up to 100 ℃~120℃ vacuum dehydration for 4 hours, lower the temperature below 50℃, add 322g of diphenylmethane diisocyanate, heat up slowly, control the temperature at 80~85℃, react under vacuum for 2.5h, lower the temperature at 50~60℃, add defoaming agent, catalyst, coupling agent, water absorbing agent, gas absorbing agent, stirred for 1 hour, and then discharged and sealed to obtain the waterproof coating of the present invention.

Embodiment 3

[0025] Add 1253g polyether diol, 210g polyether triol, 853g plasticizer, and 8.4g dispersant to a 5L four-necked reaction flask, heat up to 80°C, add 318g kaolin and 318g heavy calcium, and heat up to 100°C Vacuum dehydration at ~120°C for 4 hours, lower the temperature below 50°C, add 224g of toluene diisocyanate, heat up slowly, control the temperature at 80-85°C, react under vacuum for 2.5h, cool down at 50-60°C, add defoamer, catalyst, The coupling agent, the water absorbing agent and the gas absorbing agent are stirred for 1 hour, and the material is discharged and sealed to obtain the waterproof coating of the present invention.

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Abstract

The invention discloses a single-component water-cured polyurethane waterproof coating. The single-component coating is a NCO group terminated prepolymer obtained by the reaction of polyether polyol and polyisocyanate after the polyether polyol is hydrated in vacuum; and the weight ratio of the polyether polyol to the polyisocyanate is (2-10): 1. The coating is ecological and environment-friendly, has excellent mechanical property, good high and low temperature resistance and good solvent resistance and corrosion resistance, can be constructed on moist basal planes, does not affect adhesive property, and has high cost performance, low specific weight, low consumption in unit area and low comprehensive manufacturing cost.

Description

Technical field: [0001] The invention relates to a polyurethane waterproof coating applied in the field of architectural coatings, especially a polyurethane waterproof coating that can be applied on a wet base surface, in particular to an environment-friendly polyurethane waterproof coating using water as a curing agent and a preparation process thereof. Background technique: [0002] Polyurethane waterproof coating is a new type of high-grade waterproof material. It has excellent overall waterproof effect, high strength, good elasticity, strong adhesion, high and low temperature resistance, corrosion resistance, and easy construction. It is favored by domestic and foreign waterproofing circles. [0003] Polyurethane waterproof coating is a new type of polymer waterproof material that appeared in Europe, America and Japan in the 1960s. It was originally a two-component liquid rubber type polyurethane waterproof coating developed by the American Tire Rubber Company, and was la...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D175/08C09D7/12
Inventor 田凤兰段文锋孙金梅
Owner BEIJING ORIENTAL YUHONG WATERPROOF TECH CO LTD
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