Weather-resistant hard coat composition for metal, cured product and coated metal substrate

A weather resistance and composition technology, applied in metal layered products, devices for coating liquid on the surface, coatings, etc. The effect of improving manufacturing efficiency, excellent surface hardness, and excellent flexibility

Inactive Publication Date: 2021-07-23
DAICEL CHEM IND LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, if the softness and flexibility of the coating film are insufficient, the deformation of the metal substrate cannot be followed, and cracks may occur on the surface of the coating film, or rust may be generated on the cracked part.
[0004] In particular, the surface hardness and flexibility of the coating film are generally in a trade-off relationship, and currently there is no coating agent for metals that satisfies both of them.

Method used

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  • Weather-resistant hard coat composition for metal, cured product and coated metal substrate
  • Weather-resistant hard coat composition for metal, cured product and coated metal substrate
  • Weather-resistant hard coat composition for metal, cured product and coated metal substrate

Examples

Experimental program
Comparison scheme
Effect test

manufacture example 1

[0388] Production Example 1: Production of epoxy group-containing low molecular weight polyorganosilsesquioxane

[0389] In a 1000ml flask (reaction vessel) equipped with a thermometer, a stirring device, a reflux condenser and a nitrogen inlet tube, add 277.2mmol (68.30g) of 2-(3,4-epoxycyclohexyl) ethyl Trimethoxysilane, 3.0 mmol (0.56 g) of phenyltrimethoxysilane and 275.4 g of acetone, the temperature was raised to 50°C. After adding 7.74 g of a 5% potassium carbonate aqueous solution (2.8 mmol as potassium carbonate) to the thus obtained mixture over 5 minutes, 2800.0 mmol (50.40 g) of water was added over 20 minutes. It should be noted that during the addition, the temperature did not increase significantly. Thereafter, polycondensation reaction was performed for 5 hours under nitrogen flow while maintaining 50°C.

[0390] Thereafter, while cooling the reaction solution, 137.70 g of methyl isobutyl ketone and 100.60 g of 5% saline were injected. This solution was tr...

manufacture example 2

[0393] Production Example 2: Production of Epoxy Group-Containing High Molecular Weight Polyorganosilsesquioxane (1)

[0394] In a 1,000-ml flask (reaction vessel) equipped with a thermometer, a stirring device, a reflux condenser, and a nitrogen gas introduction tube, the epoxy-containing low-molecular-weight polyorganosilsesquioxane obtained in Production Example 1 was added under nitrogen flow. The mixture (75g), with respect to the net content (56.2g) of low molecular weight polyorganosilsesquioxane containing epoxy group, add the potassium hydroxide of 100ppm (5.6mg), and add the water of 2000ppm (112mg), After heating at 80°C for 18 hours, a sample was taken and the molecular weight was measured. As a result, the number average molecular weight Mn rose to 6000, then cooled to room temperature, 300 mL of methyl isobutyl ketone was added, and 300 mL of water was added, and washed with water repeatedly. As a result of concentration after removing the alkali component, 74....

manufacture example 3

[0397] Production Example 3: Production of epoxy group-containing high molecular weight polyorganosilsesquioxane (2)

[0398] In a 1,000-ml flask (reaction vessel) equipped with a thermometer, a stirring device, a reflux condenser, and a nitrogen gas introduction tube, the epoxy-containing low-molecular-weight polyethylene oxide obtained by the same method as in Production Example 1 was added under nitrogen flow. A mixture of organosilsesquioxanes (75 g), with respect to the net content (56.2 g) of epoxy-containing low molecular weight polyorganosilsesquioxanes, 100 ppm (5.6 mg) of potassium carbonate was added, and 2000 ppm ( 112mg) of water was sampled at 80°C for 18 hours and the molecular weight was measured. As a result, the number average molecular weight Mn rose to 4800, then cooled to room temperature, 300mL of methyl isobutyl ketone was added, and 300mL of Water, as a result of concentration after repeated washing with water to remove the alkali component, 74.5 g of...

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Abstract

The purpose of the present invention is to provide a weather-resistant hard coat composition for a metal, from which it is possible to efficiently form a coating film having excellent weather resistance, scratch resistance and flexibility. The present invention provides the following: a weather-resistant hard coat composition for a metal, which is characterized by containing a polyorganosilsesquioxane having a constituent unit represented by formula (1); a cured product of the hard coat composition; and a coated metal substrate which has a metal substrate and a coating film formed on at least one surface of the metal substrate and in which the coating film is a layer of a cured product of the weather-resistant hard coat composition for a metal. [In formula (1), R1 denotes a group containing an active energy ray-curable functional group.].

Description

technical field [0001] The present invention relates to a weather-resistant hard coating composition for metals capable of forming a coating film excellent in weather resistance, scratch resistance, and flexibility on the surface of metal substrates used for building components, automobile parts, and electrified products, and the metal coating composition. A cured product of the weather-resistant hard-coat composition, and a coated metal substrate whose surface is covered with a coating film formed of a layer of the cured material of the weather-resistant hard-coat composition for metal. This application claims the priority of Japanese Patent Application No. 2018-218304 for which it applied to Japan on November 21, 2018, and uses the content here. Background technique [0002] For coating agents used to protect the surface of metal substrates used in building components, automobile parts, electrical products, etc., it is required not only to impart design properties to vario...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B05D7/24B32B27/00C08F290/06C08F290/08C08G59/20C08G77/14C08G77/20C09D183/04C09D183/06C09D183/07B32B15/08C09D7/48
CPCC08G77/14C08G77/20C09D183/06C08G77/80B05D2202/10B05D3/0209B05D3/067C09D163/00C08G59/68C08G59/3281C09D5/00C09D7/48C08F290/068C09D151/085C08F299/08C08K5/0025C08L63/00C08F222/102C09D183/04B32B15/08B32B27/00B32B27/16B05D7/24C08F290/06C08F290/08C08G59/20C08G77/70Y10T428/26Y10T428/31Y10T428/31663
Inventor 清水邦雄高桥启司芝本明弘
Owner DAICEL CHEM IND LTD
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