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Preparation method of polyaspartate polyurea waterproof coating

A technology of polyaspartic acid ester and polyaspartic acid, applied in antifouling/underwater coatings, polyurea/polyurethane coatings, coatings, etc., can solve low adhesion, large thermal shrinkage, and internal stress Large and other problems, to achieve the effect of good weather resistance, good toughness and strong adhesion

Inactive Publication Date: 2011-12-21
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 method of polyaspartate polyurea waterproof coating

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] The first step is to prepare polyaspartic acid ester (code name 230):

[0024] Add 100 parts by weight of JeffamineD-230, 198 parts by weight of dibutyl maleate dropwise in the reaction kettle equipped with agitator, heating temperature control device and condenser, the time for dropping is 30 minutes, 60 ℃ of insulation 12 hours, excess The dibutyl maleate can be distilled off under reduced pressure. The measured amine value is 152.

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

[0026] Weigh 100 parts of polyaspartic acid ester 230, 60 parts of titanium dioxide, 140 parts of barium sulfate, 10 parts of pigment dispersant (BYK-110 produced by German BYK company - a kind of copolymer solvent containing acidic functional groups - The same below), grind to 25μm by three-roll machine, filter the material, and use it as the B component of the coating; Components = 4.7:1 (by weight) for mixing.

Embodiment 2

[0028] The first step is to prepare polyaspartic acid ester (code 400):

[0029] Add 100 parts by weight of JeffamineD-400, 114 parts by weight of dibutyl maleate dropwise in the reaction kettle equipped with agitator, heating temperature control device and condenser, the time for dropping is 30 minutes, 60 ℃ of insulation 12 hours, excess The dibutyl maleate can be distilled off under reduced pressure. The measured amine value was 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 powder and 10 parts of pigment dispersant BYK-110, grind to a fineness of 25 μm with a three-roller machine, and filter out the material. As the B component of the coating; the A component is N3390 (HDI trimer) produced by Bayer Company of Germany, which is mixed according to B component / A component=5:1 (by weight) during use.

Embodiment 3

[0033] The first step is to prepare polyaspartic acid ester (code 403):

[0034] Add 100 parts by weight of JeffamineT-403, 171 parts by weight of dibutyl maleate dropwise in a reaction kettle equipped with a stirrer, a heating temperature control device and a condenser. The dibutyl maleate can be distilled off 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 powder and 10 parts of pigment dispersant BYK-110, grind to a fineness of 25 μm with a three-roller machine, and filter out the material. As the B component of the coating; the A component is N3390 (HDI trimer) produced by Bayer Company of Germany, which is mixed according to B component / A group=4.5:1 (by weight) during use.

[0037] Polyaspartic acid ester polyurea waterproof coating performance index of the present invent...

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Abstract

A preparation method of a polyaspartic ester polyurea waterproof coating is characterized in that the coating is based on polyaspartic acid ester and polyisocyanate is used as a curing agent. This coating material not only preserves the excellent performance of traditional polyurea coatings, but also overcomes the shortcomings of traditional polyurea gelation time being too fast and requiring special equipment for construction. The coating has the advantages of strong adhesion, good toughness, wear resistance, and good weather resistance, and it does not contain solvents, is environmentally friendly, and can reach the required thickness in one spraying.

Description

technical field [0001] The invention relates to the paint industry in the field of chemical industry, in particular to a preparation method of waterproof paint. Background technique [0002] At present, the waterproof coatings used in the market mainly include polyurethane, acrylic 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 that they are relatively stable in performance, easy to store, and less affected by ambient temperature. The disadvantage is that construction is not very convenient. [0003] Although general coatings have the advantages of overall seamlessness and easy construction, they also have disadvantages. Fo...

Claims

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Application Information

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Patent Type & Authority Patents(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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