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Polyaspartic acid coating composition, coating film, and coated article

A technology of polyaspartic acid and aspartic acid ester, which is applied to polyurea/polyurethane coatings, synthetic resin layered products, and devices for coating liquid on the surface, etc., to achieve excellent pot life, maintenance of curing properties, and hardness and excellent weather resistance

Active Publication Date: 2022-01-04
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

[0314] Hereinafter, although an Example demonstrates this embodiment in more detail, this embodiment is not limited to these Examples. The measurement of various physical properties and the method of various evaluation are demonstrated below. In addition, unless otherwise indicated, "part" and "%" mean "part by mass" and "% by mass".

[0315] (Physical properties 1) NCO content (mass%)

[0316] The NCO content (isocyanate content, mass %) of the polyisocyanate was measured as follows. 1 to 3 g of the polyisocyanate produced in the production example was accurately weighed (Wg) in a Erlenmeyer flask, and 20 mL of toluene was added to completely dissolve the polyisocyanate. 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 solutio...

manufacture example 1-1

[0416] 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. Add 0.15 parts of a solution obtained by diluting tetrabutylammonium acetate, an isocyanuration reaction catalyst, to 10% by mass with 2-ethyl-1-hexanol to carry out isocyanuration reaction. 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. Polyisocyanate P-1 with an NCO content of 23.1% by mass, a viscosity at 25°C of 1350 mPa.s, a number average molecular weight of 590, an average number of isocyanate groups of 3.2 and a mass concentration of HDI monomer of 0.1% by mass wa...

manufacture example 1-2

[0418] Make the 4-necked flask equipped with a stirrer, a thermometer, a reflux condenser, a nitrogen blowing pipe, and a dropping funnel a nitrogen atmosphere, put in 100 parts of HDI and 0.12 parts of isobutanol, and keep the temperature in the reactor at 80°C for 2 Hour. 0.08 parts of a solution obtained by diluting the isocyanuration reaction catalyst trimethyl-2-methyl-2-hydroxyethylammonium hydroxide to 5% by mass with isobutanol was added thereto to carry out isocyanuric acid For the esterification reaction, phosphoric acid was added when the conversion rate became 20% to stop the reaction. Thereafter, the reaction liquid was kept at 160° C. for 1 hour. After the cooled reaction solution was filtered, the unreacted HDI was removed with a thin film evaporation tank. Polyisocyanate P-2 with an NCO content of 23.2% by mass, a viscosity at 25°C of 470 mPa.s, a number average molecular weight of 540, an average number of isocyanate groups of 3.0, and a mass concentration o...

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Abstract

The application provides a polyaspartic acid coating composition, which comprises an aspartic acid ester compound and a polyisocyanate composition, and the polyisocyanate composition comprises a compound selected from the group consisting of aliphatic and / or alicyclic diisocyanate A polyisocyanate obtained from one or more diisocyanate monomers in the group, wherein the molar ratio x represented by the formula (1) is 0.05 or more and 0.5 or less, and the molar ratio d represented by the formula (4) is 0.02 or more and 0.5 or less, and the molar ratio e represented by the formula (5) is 0.02 or more and 0.5 or less. Molar ratio x=(B+C+D) / (A+B+C+D) (1) molar ratio d=D / (A+B+C+D) (4) molar ratio e=E / A ( 5) In the above formula, in the polyisocyanate composition, A represents the content of isocyanurate groups, B represents the content of iminooxadiazinedione groups, C represents the content of uretdione groups (mol%), D represents the content (mol%) of allophanate groups, and E represents the content (mol%) of biuret groups.

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. 2017-043117 and patent No. 2017-043140 filed in Japan on March 7, 2017, and patent No. 2017-132041 filed in Japan on July 5, 2017, and the contents thereof 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 c...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D175/04B05D7/00B05D7/24B32B27/40C08G18/32C08G18/79
CPCC09D175/02C08G18/6415C08G18/792C08G18/794C08G18/797C08G18/798C08G2150/00B05D7/00B05D7/24B32B27/40C08G18/32C08G18/79C09D175/04C08G18/73C08G18/7837C08G18/10C08G18/022C08G18/092C08G18/3206C08G18/4833C08G18/3821C09D175/12C08G18/7831
Inventor 竹野聪志福地崇史
Owner ASAHI KASEI KK
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