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Blocked polyisocyanate composition and its application

A technology of polyisocyanate and diisocyanate, applied in the direction of polyurea/polyurethane adhesive, adhesive type, polyurea/polyurethane coating, etc., can solve the problem of shortening the heat treatment process of the easy-bonding treatment layer and failing to find the initial adhesion , Adhesion and other problems after the heat and humidity resistance test, to achieve the effects of excellent adhesion, excellent viscosity stability, hardness retention and excellent water resistance

Active Publication Date: 2022-07-19
ASAHI KASEI KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Along with this, the heat treatment process for forming the easy-adhesion treatment layer is also shortened, and sufficient initial adhesion and adhesion after the heat and humidity resistance test may not be found.

Method used

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  • Blocked polyisocyanate composition and its application
  • Blocked polyisocyanate composition and its application
  • Blocked polyisocyanate composition and its application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-1～1-13 and comparative example 1-1

[0635]

[0636] For the polyisocyanates obtained in the synthesis examples, the blocked polyisocyanate compositions produced in the examples and the comparative examples, the coating compositions containing the blocked polyisocyanate compositions, and the coating films obtained from the coating compositions, according to the following The measurement of each physical property and each evaluation were performed by the method shown.

[0637] [Property 1-1] Isocyanate group (NCO) content of polyisocyanate

[0638]Precisely weigh 1 to 3 g (Wg) of polyisocyanate in an Erlenmeyer flask. Next, 20 mL of toluene was added to dissolve the polyisocyanate. Next, 10 mL of a 2N toluene solution of di-n-butylamine was added, and after mixing, it was left at room temperature for 15 minutes. Next, 70 mL of isopropanol was added and mixed. Next, this solution was titrated with an indicator using 1N hydrochloric acid solution (Factor F). The resulting titer was V2mL. Next, the same operat...

Synthetic example 1-1

[0740] [Synthesis Example 1-1] Synthesis of Polyisocyanate P1-1

[0741] To a four-necked flask equipped with a thermometer, a stirring blade and a reflux cooling pipe, HDI: 1000 parts and trimethylolpropane: 33 g were charged under nitrogen flow, and the temperature in the reactor was maintained at 70°C while stirring. To this, tetramethylammonium hydroxide was added, and phosphoric acid was added to stop the reaction when the yield was 48%. After filtering the reaction liquid, unreacted HDI was removed by a thin-film distillation apparatus to obtain an isocyanurate-type polyisocyanate (hereinafter, sometimes referred to as "polyisocyanate P1-1").

[0742] The NCO content of the obtained polyisocyanate P1-1 was 19.9 mass %, the number average molecular weight was 1080, and the average number of isocyanate groups was 5.1.

Synthetic example 1-2

[0743] [Synthesis Example 1-2] Synthesis of Polyisocyanate P1-2

[0744] To a four-necked flask equipped with a thermometer, a stirring blade, and a reflux cooling pipe, HDI: 800 parts, IPDI: 200 g, and trimethylolpropane: 75 g were added under nitrogen flow, and the temperature in the reactor was kept at 70 while stirring. °C. To this, tetramethylammonium hydroxide was added, and phosphoric acid was added to stop the reaction when the yield was 46%. After filtering the reaction liquid, unreacted HDI and IPDI were removed by a thin-film distillation apparatus to obtain an isocyanurate-type polyisocyanate (hereinafter, sometimes referred to as "polyisocyanate P1-2").

[0745] The NCO content of the obtained polyisocyanate P1-2 was 18.5 mass %, the number average molecular weight was 1200, and the average number of isocyanate groups was 5.3.

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Abstract

The blocked polyisocyanate composition contains a blocked polyisocyanate obtained from a polyisocyanate and one or more blocking agents, wherein the blocking agent contains a compound represented by the following general formula (I), and the following block polyisocyanates are: The content of the methane tetracarbonyl structure represented by the general formula (II) is 0.5 mol% or more with respect to the total molar amount of the bonding structure formed by bonding the compound represented by the general formula (I) to the polyisocyanate and 10 mol% or less.

Description

technical field [0001] The present invention relates to blocked polyisocyanate compositions and uses thereof. Specifically, the present invention relates to a blocked polyisocyanate composition, a coating composition, a coating film, an article, an adhesive composition, an easy-adhesion treatment laminate, a multilayer coating film laminate, and a method for forming a coating film. This application is based on Japanese Patent Application No. 2017-187525 filed in Japan on September 28, 2017, Japanese Patent Application No. 2017-239083 filed in Japan on December 13, 2017, and Japanese Patent Application No. 2017-239083 filed in Japan on March 28, 2018 Japanese Patent Application No. 2018-062035, and Japanese Patent Application No. 2018-154117, Japanese Patent Application No. 2018-154118, and Japanese Patent Application No. 2018-154119, which were filed in Japan on August 20, 2018, claim priority, the contents of which are hereby incorporated herein by reference . Background t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G18/80C08G18/28C08G18/73C08G18/75C09D175/04
CPCC08G18/73C09D175/04C08G18/8025C08G18/755C08G18/3206C08G18/4833C08G18/8093C08G18/10C09J175/04C09J175/06C08G18/44C08G18/282C08G18/348C08G18/48C08G18/42C08G18/8045
Inventor 田中瑛子三轮祐一山内理计篠宫希绘
Owner ASAHI KASEI KK
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