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Polyaspartic acid coating composition, coating film, and coated article

A technology of polyaspartic acid and aspartic acid ester, applied in polyurea/polyurethane coatings, polyamide coatings, anti-corrosion coatings, etc., to achieve the effects of maintaining dryness, excellent chemical resistance, and excellent weather resistance

Active Publication Date: 2022-04-19
ASAHI KASEI KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage of aromatic polyurea coating compositions is that the yellowing of the coating film under exposure to ultraviolet light is greatly reduced, and it has been used in a wide range of applications such as various coatings, flooring materials, and waterproofing materials.

Method used

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  • Polyaspartic acid coating composition, coating film, and coated article
  • Polyaspartic acid coating composition, coating film, and coated article
  • Polyaspartic acid coating composition, coating film, and coated article

Examples

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Embodiment

[0324] Hereinafter, although an Example demonstrates this embodiment in more detail, this embodiment is not limited to these Examples. Hereinafter, methods for measuring various physical properties and various evaluations will be described. In addition, "part" and "%" mean "part by mass" and "% by mass" unless otherwise specified.

[0325] (Physical properties 1) NCO content (mass%)

[0326] The NCO content (isocyanate content, mass %) of the polyisocyanate was measured as follows. Accurately weigh (Wg) 1-3 g of the polyisocyanate produced by the production example in the Erlenmeyer flask, add 20 mL of toluene, and dissolve the polyisocyanate completely. Thereafter, 10 mL of a toluene solution of 2 equivalents of di-n-butylamine was added, mixed completely, and then left to stand at room temperature for 15 minutes. Furthermore, 70 mL of isopropanol was added to this solution, and it mixed completely. Titrate the solution with 1 N hydrochloric acid solution (factor F) using...

manufacture example 1-1

[0399] A 4-necked flask equipped with a stirrer, a thermometer, a reflux condenser, a nitrogen blowing tube, and a dropping funnel was made into a nitrogen atmosphere, and 100 parts of HDI were put into it, and the temperature in the reactor was kept at 60° C. while stirring. 0.15 parts of a solution obtained by diluting tetrabutylammonium acetate, an isocyanurate reaction catalyst, to 10% by mass with 2-ethyl-1-hexanol was added thereto, and the isocyanurate reaction was carried out. When the NCO content of the liquid became 43.8% by mass, phosphoric acid was added to stop the reaction. Thereafter, the reaction solution was kept at 90° C. for 1 hour. After the cooled reaction solution was filtered, the unreacted HDI was removed with a thin film evaporation tank. The obtained NCO content is 23.1% by mass, the viscosity at 25°C is 1350mPa.s, the number average molecular weight is 590, the average number of isocyanate groups is 3.2, the mass concentration of HDI monomer is 0.1%...

manufacture example 1-2

[0401]Make a nitrogen atmosphere in the 4-neck flask equipped with a stirrer, a thermometer, a reflux condenser, a nitrogen blowing pipe, and a dropping funnel, and drop 100 parts of HDI and 33.7 parts of polycaprolactone triol with a number average molecular weight of 850, and react under stirring. The temperature in the vessel was kept at 95° C. for 90 minutes to carry out the urethanization reaction. After the cooled reaction solution was filtered, the unreacted HDI was removed with a thin film evaporation tank. The obtained NCO content is 9.0% by mass, the viscosity at 25°C is 4980mPa.s, the number average molecular weight is 1520, the average number of isocyanate groups is 3.3, the mass concentration of HDI monomer is 0.2% by mass, and the content of isocyanurate trimer is 0.0% by mass % of polyisocyanate P1-2.

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Abstract

The present invention provides polytramine coatings compositions, etc., which contains: (A) (I) [in the formula, X is an N price organ group.R 1 R 2 In response, the organic group of non -active is an integer above 2.〕 Skywincharides shown in the category; and (B) polytychenate ingredients, the polykeexate ingredients consisting of a group of diisocyanate in a group consisting of a group composed of free alipher and lipotrophic diisocyanateThe average molecular weight of more than 500 and below 1500 polycophactone polymirol is obtained. The proportion of the aforementioned polycophactone polyol is 20 % or more.Three clusters.

Description

technical field [0001] The present invention relates to a polyaspartic acid coating composition, a coating film, and a coated article. [0002] This application claims priority based on Patent No. 2017-043141 filed in Japan on March 7, 2017 and Patent No. 2017-169741 filed in Japan on September 4, 2017, the contents of which are incorporated herein. Background technique [0003] The aliphatic polyaspartic acid coating composition in the polyurea coating composition is formed from an amino group-containing aspartic acid ester compound and an isocyanate group-containing aliphatic and / or alicyclic polyisocyanate composition. Aromatic polyurea coating compositions have been used in a wide range of applications such as various coatings, flooring materials, and waterproofing materials due to their greatly reduced yellowing of the coating film when exposed to ultraviolet rays, which has a disadvantage. [0004] The viscosity of the aspartic acid ester compound is lower than that o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D175/04B05D7/00B05D7/24B32B27/18B32B27/40C08G18/32C08G18/79
CPCB05D7/00B05D7/24B32B27/18B32B27/40C08G18/32C08G18/79C09D175/04C09D175/06C08G18/10C08G18/73C08G18/4277C08G18/792C08G18/022C08G18/092C08G18/7837Y02E10/72C09D5/08C09D177/04
Inventor 竹野聪志
Owner ASAHI KASEI KK
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