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Polyisocyanate composition, coating composition, and coated substrate

A polyisocyanate and diisocyanate technology, applied in the field of polyisocyanate compositions, can solve the problems of being difficult to disperse, easily reacting with water, and having a short period of validity, and achieve the effect of excellent water resistance and solvent resistance

Active Publication Date: 2021-04-27
ASAHI KASEI KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the case of a water-based two-component polyurethane composition, when compared with a solvent-based two-component polyurethane composition in terms of composition composition, there are problems such as being difficult to disperse in water and easily reacting with water, and the pot life short question point

Method used

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  • Polyisocyanate composition, coating composition, and coated substrate
  • Polyisocyanate composition, coating composition, and coated substrate
  • Polyisocyanate composition, coating composition, and coated substrate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0275] Hereinafter, although an Example demonstrates this invention, this invention is not limited to a following Example.

[0276] Hereinafter, although an Example and a comparative example are given and this invention is demonstrated more concretely, unless this invention exceeds the summary, it is not limited to a following example.

[0277] The physical properties and evaluations of the polyisocyanate compositions in Examples and Comparative Examples were measured and evaluated as follows. In addition, unless otherwise stated, "part" and "%" mean "part by mass" and "% by mass".

[0278]

[0279] [Physical property 1]

[0280] (viscosity)

[0281] The viscosity was measured at 25° C. with an E-type viscometer (manufactured by TOKIMEC). A standard rotor (1°34' x R24) was used. The rotation speed is as follows.

[0282] (Rotating speed)

[0283] 100r.p.m. (less than 128mPa·s)

[0284] 50r.p.m. (128mPa·s or more and less than 256mPa·s)

[0285] 20r.p.m. (over 256mPa·...

Synthetic example 1-1

[0349] (Synthesis of HES / TBA)

[0350] 10 mass parts of 1-propanol was added to 20 mass parts of 70 mass % 2-hydroxyethanesulfonic acid (it may abbreviate as "HES" hereafter) aqueous solution, and it stirred and obtained the solution. Furthermore, tributylamine (hereinafter sometimes abbreviated as "TBA") was dropped into the stirring solution so that the molar equivalence ratio with respect to HES became 1, and diluted with the same mass part of 1-propanol to obtain obtained liquid. Stirring was stopped after 1 hour from the start of the dropwise addition, and dehydration and solvent removal were performed using an evaporator to obtain 2-hydroxyethanesulfonic acid tributylamine salt (hereinafter sometimes abbreviated as "HES / TBA") with a solid content of 99.8% by mass. .

Synthetic example 1-2

[0352] (Synthesis of HBS / DMCHA)

[0353] 10 mass parts of 1-propanol was added to 20 mass parts of 85 mass % 4-hydroxybenzenesulfonic acid (it may abbreviate as "HBS" hereafter) aqueous solution, and it stirred and obtained the solution. Furthermore, dimethylcyclohexylamine (hereinafter sometimes abbreviated as "DMCHA") was measured dropwise to the aforementioned solution under stirring so that the molar equivalence ratio with respect to HBS became 1, and the same mass part of 1-propanol was used. Diluted liquid. Stirring was stopped after 1 hour from the start of the dropwise addition, and dehydration and solvent removal were carried out by an evaporator to obtain 4-hydroxybenzenesulfonic acid dimethylcyclohexylamine (hereinafter sometimes abbreviated as "HBS / DMCHA") with a solid content of 99.8% by mass. ).

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Abstract

The invention relates to a polyisocyanate composition, a coating composition and a coated substrate. The present invention provides a polyisocyanate composition containing (A) a hydrophilic polyisocyanate compound derived from a polyisocyanate compound and a hydrophilic compound, and (B) a silicon-containing compound, the polyisocyanate compound is derived from one or more types of diisocyanate selected from the group consisting of aliphatic diisocyanates, alicyclic diisocyanates, and aromatic diisocyanates, and the content of the (B) silicon-containing compound is 1-50 parts by mass per 100 parts by mass of the polyisocyanate compound.

Description

technical field [0001] The present invention relates to polyisocyanate compositions, coating compositions and coated substrates. Background technique [0002] A coating film obtained from a two-component polyurethane composition using a polyisocyanate composition derived from aliphatic diisocyanate or alicyclic diisocyanate as a curing agent exhibits excellent weather resistance, chemical resistance, abrasion resistance, etc. Performance, therefore, is widely used as coatings, inks and adhesives, etc. In recent years, global environmental issues have been highly valued, and water-based two-component polyurethane compositions that do not use or reduce the amount of organic solvents have been proposed. However, in the case of the water-based two-component polyurethane composition, when compared with the solvent-based two-component polyurethane composition in terms of the composition, there are problems such as being difficult to disperse in water and easily reacting with wate...

Claims

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Application Information

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IPC IPC(8): C08G18/80C09D175/04
CPCC08G18/80C09D175/04C08G18/706C08G18/6229C08G18/0828C08G18/8064C08G18/0819C08G18/2835C08G18/61C08G18/792
Inventor 李冠山内理计
Owner ASAHI KASEI KK
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