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Polyisocyanate composition

A polyisocyanate and composition technology, applied in polyurea/polyurethane coatings, coatings, etc., can solve problems such as difficult dispersion and carbon dioxide generation

Active Publication Date: 2019-06-04
ASAHI KASEI KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the polyisocyanate used as a curing agent in the two-component urethane coating composition has the problem that it is not easy to disperse in water, and it is easy to react with water to generate carbon dioxide.

Method used

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  • Polyisocyanate composition
  • Polyisocyanate composition
  • Polyisocyanate composition

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0270] Hereinafter, specific examples and comparative examples are given to describe the present embodiment in more detail, but the present embodiment is not limited to the following examples and comparative examples unless the gist is exceeded. In Examples and Comparative Examples, the physical properties and evaluation of the polyisocyanate composition were measured as follows. In addition, unless otherwise stated, "part" and "%" mean "part by mass" and "% by mass".

[0271]

[0272] [Physical properties 1] Non-volatile components

[0273] When diluting with a solvent using the polyisocyanate composition obtained in the Example and the comparative example as a sample, the non-volatile matter was computed by the method shown below. First, accurately weigh the mass of the aluminum cup, put about 1 g of the sample, and precisely weigh the mass of the cup before heating and drying. Next, the cup containing the sample was heated in a dryer at 105° C. for 3 hours. Next, after...

manufacture example 1

[0370] [Production Example 1] Production 1 of amine salt of sulfonic acid

[0371] 10 mass parts of 1-propanol was added and stirred to 20 mass parts of 2-hydroxyethanesulfonic acid 70 mass % aqueous solutions, and the solution was obtained. Furthermore, triethylamine was measured so that the molar ratio with respect to 2-hydroxyethanesulfonic acid might become 1, and it diluted with 10 mass parts of 1-propanol. Next, a dilute solution of triethylamine was added dropwise to the stirred 2-hydroxyethanesulfonic acid solution. Stirring was stopped 1 hour after the start of the dropwise addition, and dehydration and desolventization were performed in an evaporator to obtain triethylamine salt of 2-hydroxyethanesulfonic acid with a solid content of 99.8% by mass.

manufacture example 2

[0372] [Production Example 2] Production 2 of amine salt of sulfonic acid

[0373]Except for using N,N-diisopropylethylamine instead of triethylamine, N,N-diisopropylethylamine 2-hydroxyethanesulfonic acid with a solid content of 99.8% by mass was obtained in the same manner as in Production Example 1. Salt.

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Abstract

This polyisocyanate composition comprises: a polyisocyanate that contains a sulfonate anion group in the molecule; and either at least one member selected from tertiary ammonium cations of an amine compound represented by general formula (1) and at least one member selected from tertiary ammonium cations of an amine compound represented by general formula (2), or at least two members selected fromtertiary ammonium cations of amine compounds represented by general formula (1) in which the total number of carbon atoms in R11, R12, and R13 differ from one another.

Description

technical field [0001] This invention relates to polyisocyanate compositions. [0002] This application claims priority based on Japanese Patent Application No. 2016-200342 for which it applied to Japan on October 11, 2016, and takes in the content here. Background technique [0003] In recent years, from the viewpoint of environmental protection, the water-based conversion of room-temperature crosslinkable two-component urethane coating compositions conventionally used as solvent-based coatings has been desired. However, the polyisocyanate used as a curing agent in the two-component urethane coating composition has the problem that it is not easily dispersed in water and easily reacts with water to generate carbon dioxide. Therefore, the development of polyisocyanates having high emulsifiability and suppressing the reaction between isocyanate groups and water in a water-dispersed state has been advanced. [0004] Patent Document 1 discloses a reaction product of a polyiso...

Claims

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Application Information

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IPC IPC(8): C08G18/28C08G18/08C09D175/04
CPCC08G18/0828C08G18/6229C08G18/706C08G18/792C09D175/04C08G18/28
Inventor 中岛和子
Owner ASAHI KASEI KK