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Preparation of polyaspartate polyurea waterproof coating material

A technology of polyaspartic ester and waterproof coatings, which is applied in antifouling/underwater coatings, polyurea/polyurethane coatings, coatings, etc., and can solve problems such as low adhesion, short gel time, and large thermal shrinkage problems, to achieve the effect of good weather resistance, obvious effect and good toughness

Inactive Publication Date: 2009-07-01
SHANGHAI HUAYI FINE CHEM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, because the gel time of polyurea reaction is very short, only a few seconds, the traditional spray polyurea coating construction must use special high temperature and high pressure impact mixing equipment, which not only increases the construction cost, but also is not conducive to general construction personnel operation
A series of problems are also exposed during the application process, such as pitting, orange peel, etc. on the surface of the coating, poor appearance; poor wettability to the substrate, low adhesion; concentrated reaction heat release, thermal shrinkage Large rate, large internal stress; poor color retention and UV resistance, etc.

Method used

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  • Preparation of polyaspartate polyurea waterproof coating material
  • Preparation of polyaspartate polyurea waterproof coating material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] The first step is to prepare polyaspartate (Code 230):

[0024] Add 100 parts by weight of Jeffamine D-230 and 198 parts by weight of dibutyl maleate to a reactor equipped with a stirrer, heating and temperature control device and a condenser. The addition time is 30 minutes and the temperature is kept at 60°C for 12 hours. The dibutyl maleate can be removed by distillation under reduced pressure. The measured amine value is 152.

[0025] The second step is to prepare waterproof coating:

[0026] Weigh out 100 parts of polyaspartate 230, 60 parts of titanium dioxide, 140 parts of barium sulfate, 10 parts of pigment dispersant (BYK-110 produced by BYK, Germany-a copolymer solvent containing acidic functional groups- The same below), grind the fineness to 25μm by a three-roller, and filter out the material as the B component of the coating; the A component is N3390 (HDI trimer) produced by Bayer, Germany, and it is used according to the B component / A Component = 4.7:1 (by wei...

Embodiment 2

[0028] The first step is to prepare polyaspartate (code 400):

[0029] Add 100 parts by weight of Jeffamine D-400 and 114 parts by weight of dibutyl maleate to a reactor equipped with a stirrer, heating temperature control device and condenser. The addition time is 30 minutes, and the temperature is kept at 60°C for 12 hours. The dibutyl maleate can be removed by distillation under reduced pressure. The measured amine value is 131.

[0030] The second step is to prepare waterproof coating:

[0031] Weigh 100 parts of polyaspartic acid ester 400, 60 parts of titanium dioxide, 70 parts of barium sulfate, 70 parts of talc and 10 parts of pigment dispersant BYK-110, grind the fineness to 25μm by a three-roller machine, and filter out. As the B component of the coating; the A component is N3390 (HDI trimer) produced by Bayer, Germany, and it is mixed according to the B component / A component = 5:1 (by weight) when used.

Embodiment 3

[0033] The first step is to prepare polyaspartate (code 403):

[0034] Add 100 parts by weight of Jeffamine T-403 and 171 parts by weight of dibutyl maleate to the reactor equipped with agitator, heating temperature control device and condenser. The dripping time is 30 minutes and the temperature is kept at 60°C for 12 hours. The dibutyl maleate can be removed by distillation under reduced pressure. The measured amine value is 155.

[0035] The second step is to prepare waterproof coating:

[0036] Weigh 100 parts of polyaspartic acid ester 403, 60 parts of titanium dioxide, 70 parts of barium sulfate, 70 parts of talc and 10 parts of pigment dispersant BYK-110, grind the fineness to 25μm with a three-roller machine, and filter out. As the B component of the coating; the A component is N3390 (HDI trimer) produced by Bayer, Germany, and it is mixed according to the B component / A component=4.5:1 (by weight) when used.

[0037] The performance indexes and measured values ​​of the pol...

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Abstract

The invention discloses a method for preparing a polyaspartate polyurea waterproof coating, which is characterized in that the coating is based on polyaspartate polyurea and takes polyisocyanates as a curing agent. The coating material maintains the excellent performance of the prior polyurea coating, and also overcomes the disadvantages that the prior polyurea has overquick gelation time and needs special equipment for construction at the same time. The coating has the advantages of strong adhesion force, good toughness and wear resistance, good weather performance and so on, does not contain a solvent, is green and environment-friendly, and can reach the needed thickness through spray coating at one time.

Description

Technical field [0001] The invention relates to the coating industry in the chemical industry field, and specifically relates to a method for preparing a waterproof coating. Background technique [0002] The waterproof coatings currently used in the market mainly include polyurethane, acrylate waterproof coatings and polymer modified emulsified asphalt waterproof coatings. Among them, polyurethane waterproof coatings occupy an important share in the field of waterproof coatings due to their excellent performance and moderate price. Polyurethane waterproof coatings are divided into two-component and one-component polyurethane waterproof coatings. The advantages of two-component coatings are relatively stable performance, easy storage, and low degree of influence by ambient temperature. The disadvantage is that the construction is not convenient. [0003] Although general coatings have the advantages of being seamless and easy to construct, they also have shortcomings. For example,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D175/02C09D5/16
Inventor 葛喨孙凌潘达力
Owner SHANGHAI HUAYI FINE CHEM CO LTD
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