Polyisocyanate composition, coating composition and method of manufacturing coating material

A technology of polyisocyanate and diisocyanate, which is applied in the field of polyisocyanate composition, can solve the problems of bad influence of combustion catalyst and different effects, and achieve excellent moisture stability and high drying effect

Active Publication Date: 2017-09-22
ASAHI KASEI KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to improve the curability, for example, there is a method of adding an organic tin compound, etc., but this method has the following problems: the effect may vary depending on the composition of the paint, and the organic solvent volatilized in the coating, etc. will affect the combustion catalyst of the processing device. cause adverse effects, etc.

Method used

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  • Polyisocyanate composition, coating composition and method of manufacturing coating material
  • Polyisocyanate composition, coating composition and method of manufacturing coating material
  • Polyisocyanate composition, coating composition and method of manufacturing coating material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0135] A nitrogen atmosphere was formed in a four-necked flask equipped with a stirrer, a thermometer, a reflux cooling pipe, and a nitrogen blowing pipe, and 600 parts of HDI, 10.8 parts of 1,3-butanediol as a glycol, and 0.24 parts of water (relative to HDI 400 ppm), the temperature inside the reactor was kept at 90° C. for 1 hour under stirring, and the carbamate reaction was carried out. Then, the temperature in the reactor was kept at 80° C., 0.03 parts of tetramethylammonium caprate was added as an isocyanurate catalyst, and the refractive index of the reaction liquid was measured. Phosphoric acid was added at the point when the yield was 55%. Stop responding. After filtering the reaction solution, unreacted HDI was removed using a thin film evaporation tank. The obtained 343 g polyisocyanate composition had a non-volatile content of 99.8% by mass, a viscosity of 20800 mPa·s at 25°C, an isocyanate group concentration of 19.2% by mass, a diisocyanate monomer concentratio...

Embodiment 2

[0137] A nitrogen atmosphere was formed in a four-necked flask equipped with a stirrer, a thermometer, a reflux cooling tube, and a nitrogen blowing tube, and 600 parts of HDI, 24 parts of 1,3-butanediol as a glycol, and 0.24 parts of water (relative to HDI 400 ppm), the temperature inside the reactor was kept at 90° C. for 1 hour under stirring, and the carbamate reaction was carried out. Then, the temperature in the reactor was kept at 80° C., 0.03 parts of tetramethylammonium caprate was added as an isocyanurate catalyst, and the refractive index of the reaction liquid was measured. Phosphoric acid was added at the point when the yield was 55%. Stop responding. After filtering the reaction solution, unreacted HDI was removed using a thin film evaporation tank. The obtained 343 g polyisocyanate composition had a non-volatile content of 99.8% by mass, a viscosity of 14500 mPa·s at 25°C, an isocyanate group concentration of 19.0% by mass, a diisocyanate monomer concentration ...

Embodiment 3～5

[0139] The compositions and reaction conditions of the raw materials to be charged were changed as shown in Table 1, but were synthesized in the same manner as in Example 1. Table 1 shows the composition of the raw materials added, the reaction conditions and the physical properties of the polyisocyanate composition.

[0140] Table 2 shows the results of compatibility evaluation and moisture stability of the polyisocyanate compositions obtained in Examples 1 to 5.

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Abstract

A polyisocyanate composition, coating composition and method of manufacturing coating material are provided. A polyisocyanate composition exhibiting high dryness, and further excellent in moisture stability and compatibility with a polyol, a coating composition containing the same, and a coating method thereof are provided. A polyisocyanate composition comprises a polyisocyanate composition obtained from one or more diisocyanates selected from the group consisting of aliphatic diisocyanates and alicyclic diisocyanates and one or more diols; in the polyisocyanate composition, the molar ratio of the ureido group / (ureido + isocyanurate group) is from 0.0001 to 0.1, and the allophanate group / (isocyanurate group + urea Carboxylate group) is in the range of 0.2 to 0.9.

Description

technical field [0001] The present invention relates to a polyisocyanate composition, a coating composition, and a method for producing a coated body. Background technique [0002] Conventional polyurethane resin coatings are known to have excellent abrasion resistance, chemical resistance, and stain resistance, and in particular non-yellowing polyisocyanates derived from hexamethylene diisocyanate and isophorone diisocyanate are used The polyurethane resin coating has further excellent weather resistance. Therefore, the use of this polyisocyanate involves many aspects such as construction, heavy defense, automobile, industrial use and its repair in the form of a two-component urethane coating at room temperature or heat curing. In each use, in order to shorten the process, etc., it is expected to improve curability. [0003] In order to improve the curability, for example, there is a method of adding an organic tin compound, etc., but this method has the following problem...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/78C08G18/79C08G18/73C08G18/32C09D175/04C09D5/08B05D7/24
CPCB05D7/24C08G18/3206C08G18/73C08G18/7825C08G18/7837C08G18/7843C08G18/792C09D5/08C09D175/04
Inventor 福地崇史洪昌峰
Owner ASAHI KASEI KK
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