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Polyisocyanate composition

A polyisocyanate and isocyanurate technology, applied in the direction of polyurea/polyurethane coatings, coatings, etc., can solve the problems of poor curing and achieve the effect of inhibiting coloration

Active Publication Date: 2014-12-31
ASAHI KASEI KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, polyisocyanate compositions obtained from 1,6-diisocyanatohexane have inferior curability compared to aromatic polyisocyanate compositions such as MDI (diphenylmethane diisocyanate) and TDI (toluene diisocyanate). this question

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0147] Hereinafter, the present invention will be described in more detail based on examples and comparative examples, but the present invention is not limited to the following examples.

[0148]

[0149] The viscosity was measured at 23° C. using an E-type viscometer (manufactured by Tokyo Keiki Co., Ltd.). In the measurement, a standard rotor (1°34'×R24) was used. The rotation speed is as follows.

[0150] 100rpm (less than 128mPa·s)

[0151] 50rpm (over 128mPa·s and less than 256mPa·s)

[0152] 20rpm (over 256mPa·s and less than 640mPa·s)

[0153] 10rpm (over 640mPa·s and less than 1280mPa·s)

[0154] 5rpm (over 1280mPa·s and less than 2560mPa·s)

[0155] In addition, the non-volatile content of the polyisocyanate composition produced in each Example and each comparative example mentioned later was investigated by the method described below, and when the value was 98 mass % or more, it measured it as it was. When it is less than 98% by mass, the concentration of the...

Synthetic example 1

[0250] (Synthesis Example 1: Synthesis of Catalyst)

[0251] Into a 500 mL eggplant-shaped flask replaced with nitrogen, 200 g (0.116 mol) of tetramethylammonium hydroxide (10% by mass methanol solution) (manufactured by Tokyo Chemical Industry Co., Ltd.) was charged at room temperature, and capric acid was added dropwise with a dropping funnel (manufactured by Tokyo Chemical Industry Co., Ltd.) 12.1 g (tetramethylammonium hydroxide / capric acid=1 / 1.1 (molar ratio)), and stirred at room temperature for 30 minutes. Thereafter, methanol was distilled off under conditions of 10 Torr, 50° C., and 30 minutes. 32 g of n-butanol was added thereto to obtain a 50% by mass butanol solution of tetramethylammonium caprate. Then, 40 g of n-butanol was further added to 10 g of the 50 mass % butanol solution of tetramethylammonium caprate, to obtain a 10 mass % butanol solution of tetramethylammonium caprate. Further, 15 g of n-butanol was further added to 10 g of this 10 mass % butanol sol...

Synthetic example 2

[0252] (Synthesis Example 2: Synthesis of Acrylic Polyol)

[0253] Into a four-necked flask equipped with a stirrer, a thermometer, and a condenser, 120.0 g of "SOLVESSO #150" (an aromatic solvent manufactured by Exxon Corporation Chemical Co., Ltd.) and 60.0 g of xylene were charged, and after the inside was replaced with nitrogen, the temperature was raised to 120°C. Thereafter, (meth)acrylic monomers (128.8 g of methyl methacrylate, 84.8 g of n-butyl acrylate, 80.0 g of cyclohexyl methacrylate, 74.4 g of 2-hydroxyethyl methacrylate) were added dropwise over 2 hours. g, styrene 32.0g) and benzoyl peroxide 8.0g, make it carry out stirring reaction. After completion of the dropwise addition, the reaction was further continued at 120° C. for 4 hours to obtain acrylic polyol Ac-1.

[0254] The obtained acrylic polyol Ac-1 had a non-volatile content of 70% by mass, a hydroxyl value of 80 mgKOH / g (value calculated from the feed ratio to the resin component, JIS K1557), and a gla...

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Abstract

The invention provides a polyisocyanate composition which can restrain coloring even adding and storing compounds including tin. The polyisocyanate composition at least employes 1,6-diisocyanato and includes ppm chlorinated compounds with 1-100 mass of chlorine.

Description

technical field [0001] This invention relates to polyisocyanate compositions. Background technique [0002] Polyisocyanate compositions containing an isocyanurate structure obtained from 1,6-diisocyanatohexane (HDI; also called hexamethylene diisocyanate.) are known (for example, Patent Documents 1 to 3). Such a polyisocyanate composition having an isocyanurate structure is widely used. [0003] However, polyisocyanate compositions obtained from 1,6-diisocyanatohexane have inferior curability compared to aromatic polyisocyanate compositions such as MDI (diphenylmethane diisocyanate) and TDI (toluene diisocyanate). this problem. [0004] prior art literature [0005] patent documents [0006] Patent Document 1: Japanese Patent Application Publication No. 45-027982 [0007] Patent Document 2: Japanese Patent Application Laid-Open No. 55-038380 [0008] Patent Document 3: Japanese Patent Laid-Open No. 57-150677 Contents of the invention [0009] The problem to be sol...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/79C08G18/62C09D175/04
CPCC08G18/792C09D175/04
Inventor 山内理计
Owner ASAHI KASEI KK
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