Solvent-free polyaspartate polyurea elastic waterproof coating

A technology of aspartic acid ester and waterproof coating, which is applied in the direction of polyurea/polyurethane coating, coating, etc., can solve the problems of polyurea color retention and aging resistance, low adhesion, poor surface effect, etc., to achieve Excellent elongation at break, environmental friendliness, and convenient construction

Active Publication Date: 2015-08-19
SHENZHEN FEIYANG JUNYAN TECH DEV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the spray polyurea elastomer (SPUA) on the market has already shown superior performance as a waterproof material, some problems have been exposed during use, such as the reaction speed is too fast and the gel time is only a few seconds to more than ten seconds, which requires special Large-scale spraying equipment, it is difficult to apply to small areas or irregular surfaces, and the surface effect is poor; due to the fast reaction speed, the wettability of this polyurea to the base material is not good; the adhesion is low; and the reaction is exothermic Concentration; large thermal shrinkage rate; large internal stress; at the same time, this polyurea has poor color retention and aging resistance, poor decorative performance; it is not easy to repair after problems occur.

Method used

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  • Solvent-free polyaspartate polyurea elastic waterproof coating
  • Solvent-free polyaspartate polyurea elastic waterproof coating
  • Solvent-free polyaspartate polyurea elastic waterproof coating

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] A solvent-free polyaspartate polyurea elastic waterproof coating consists of two components. Component A is prepared from 34.8 parts of toluene diisocyanate (TDI) and 100 parts of polyoxypropylene diol with a molecular weight of 1000 to prepare a prepolymer with a content of 6.2% NCO, add 15 parts of diphenylmethane diisocyanate (MDI), and mix well. The NCO content is 9-11% of the A component.

[0022] After component B of the coating is added accurately in sequence according to the formula, disperse on a high-speed disperser for at least 30 minutes;

[0023] The formula is as follows:

[0024]

[0025] Mix the dispersed A component and B component according to the ratio of NCO equivalent and NH equivalent respectively, and then make a board for testing. The coating thickness is 0.5-0.6mm, and the testing standard GB / T23446-2009 (spray polyurea waterproof material) And GB / T19250 (polyurethane waterproof coating), the test results are as follows;

[0026] ...

Embodiment 2

[0029] A solvent-free polyaspartate polyurea elastic waterproof coating consists of two components. Component A is prepared from 34.8 parts of toluene diisocyanate (TDI) and 100 parts of polyoxypropylene diol with a molecular weight of 1000 to prepare a prepolymer with an NCO content of 6.2%, adding 7.5 parts of a HDI trimer with an NCO content of 21% and 7.5 parts of diphenyl Methyl methane diisocyanate (MDI), after mixing evenly, the A component with NCO content of 9-11% is prepared.

[0030] After component B of the paint is accurately added in sequence according to the formula, disperse on the high-speed disperser for at least 30 minutes;

[0031] The formula is as follows

[0032]

[0033]

[0034] Mix the dispersed components A and B according to the ratio of NCO equivalent and NH equivalent respectively, and then make a board for testing. The coating thickness is 0.5-0.6mm, and the testing standard GB / T23446-2009 (spray polyurea waterproof material) And GB / T1925...

Embodiment 3

[0037] A solvent-free polyaspartate polyurea elastic waterproof coating consists of two components. Component A is prepared from 44.4 parts of isophorone diisocyanate (IPDI) and 100 parts of polyoxypropylene diol with a molecular weight of 1000 to prepare a prepolymer with an NCO content of 5.8%, add 36 parts of dicyclohexylmethane diisocyanate, and mix well A component A with an NCO content of 11.0% was prepared.

[0038] After component B of the paint is accurately added in sequence according to the formula, disperse on the high-speed disperser for at least 30 minutes;

[0039] The formula is as follows:

[0040] Material composition

[0041] Mix the dispersed components A and B according to the ratio of NCO equivalent and NH equivalent respectively, and then make a board for testing. The coating thickness is 0.5-0.6mm, and the testing standard GB / T23446-2009 (spray polyurea waterproof material) And GB / T19250 (polyurethane waterproof coating), the test results ar...

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Abstract

The invention relates to paint and a preparation method thereof and discloses solvent-free polyaspartic acid ester polyurea elastic waterproof paint. The solvent-free polyaspartic acid ester polyurea elastic waterproof paint is composed of a component A and a component, wherein the component A comprises 2%-35% of polyisocyanate and 65%-98% of end seal isocyanate prepolymer by weight percent; and the component B comprises 20%-60% of polyaspartic acid ester, 10%-40% of polymeric modified poly aspartic acid ester, 5%-30% of stuffing and a small amount of additives by weight percent. Compared with the polyurea paint processed by the polyaspartic acid ester, the solvent-free polyaspartic acid ester polyurea elastic waterproof paint processed by raw materials has the advantages that the construction is convenient, a special large-scale spraying device is not needed, the gelation time is prolonged, the surface drying time is shortened, the tensile strength is enhanced, the elongation at break is increased, and the elastic coating film hardness is increased, does not have a solvent, is environment-friendly and harmless to a human body.

Description

technical field [0001] The invention relates to a waterproof coating, in particular to a solvent-free polyaspartic acid with good waterproof performance, excellent mechanical properties, acid and alkali resistance, salt resistance, water resistance, aging resistance, corrosion resistance, convenient construction and no need for special large-scale spraying equipment. Urethane polyurea elastic waterproof coating. Background technique [0002] Polyaspartic ester coating is an aliphatic, slow response, high weather resistance and high performance coating developed in the field of polyurea in recent years, known as the third generation of polyurea. Compared with traditional polyurethane coatings, its main resin, polyaspartic acid ester, is secondary aminodiamine, which has a faster reaction speed, is easy to achieve thick coating, reduces construction time and times, and has excellent performance; at the same time, it has high solid and low viscosity Especially suitable for the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D175/02
Inventor 崔治清张余英邬茳蒋茶罗善锴刘小卿肖增钧傅民
Owner SHENZHEN FEIYANG JUNYAN TECH DEV
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