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Polyisocyanate composition, method for producing same, blocked polyisocyanate composition, method for producing same, resin composition, and cured article

A technology of polyisocyanate and production method, applied in the field of polyisocyanate composition and its production, blocked polyisocyanate composition and its production, resin composition, and cured products, can solve the problems such as polyisocyanate is difficult to disperse, and achieve excellent Effects of Water Resistance and Heat Resistance Strength

Active Publication Date: 2017-08-29
ASAHI KASEI KOGYO KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the two-component urethane coating composition, polyisocyanate used as a curing agent is difficult to disperse in water

Method used

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  • Polyisocyanate composition, method for producing same, blocked polyisocyanate composition, method for producing same, resin composition, and cured article
  • Polyisocyanate composition, method for producing same, blocked polyisocyanate composition, method for producing same, resin composition, and cured article
  • Polyisocyanate composition, method for producing same, blocked polyisocyanate composition, method for producing same, resin composition, and cured article

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0182] The present embodiment will be described in more detail by showing specific examples and comparative examples below, but the present embodiment is not limited at all by the following examples and comparative examples within the scope not exceeding the gist. Various properties and evaluations in Examples and Comparative Examples were measured and evaluated as follows.

[0183] (Physical property 1) Yield

[0184] The polyisocyanate precursor was used as a sample, and the yield of the polyisocyanate precursor was determined by measuring the refractive index of the reaction solution.

[0185] (Physical property 2) Viscosity

[0186] Using the polyisocyanate precursor as a sample, the viscosity of the polyisocyanate precursor at 25° C. was determined using an E-type viscometer RE-80U (manufactured by Toki Sangyo Co., Ltd.).

[0187] (Physical property 3) Isocyanate group concentration

[0188] 1 to 3 g (Wg) of a polyisocyanate precursor was accurately weighed in an Erlen...

Embodiment 28～42

[0236] Examples 28-42, Comparative Examples 10-14: 80°C, 60 minutes

Embodiment 43～54

[0237] Examples 43-54, Comparative Examples 15-19: 160°C, 60 minutes

[0238] A rubber ring with a diameter of 2 cm was placed on the obtained coating film, and water was dripped there. In order to prevent volatilization, a watch glass was placed on the top, and it left still at 23 degreeC for 2 days. After 2 days, water was removed, and the haze before and after adding water was measured. About the haze value of a coating film, it measured using the brand name Haze meter by Suga Test Instruments Co., Ltd. based on JISK7361.

[0239] The evaluation criteria are as follows. In addition, when precipitation etc. generate|occur|produced in the said coating composition, it described as "unable to evaluate".

[0240] ◯: The difference in haze value before and after adding water is less than 0.5, and the water resistance is good.

[0241] ×: The difference in the haze value before and after adding water is 0.5 or more, and the water resistance is poor.

[0242] (Evaluation 3) He...

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PUM

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Abstract

The present invention provides a polyisocyanate composition obtained from a polycarbonate diol, a hydrophilic compound, and a polyisocyanate that is obtained from at least one type of diisocyanate selected from the group consisting of aliphatic diisocyanates and alicyclic diisocyanates, the hydrophilic compound being capable of reacting with one isocyanate group per molecule of hydrophilic compound.

Description

technical field [0001] The present invention relates to a polyisocyanate composition and its production method, a blocked polyisocyanate composition and its production method, a resin composition, and a cured product. Background technique [0002] In recent years, from the viewpoint of environmental protection, it is desired that the room-temperature crosslinking type two-component urethane coating composition used as a solvent-based coating is an aqueous system. However, in a two-liquid urethane coating composition, polyisocyanate used as a curing agent is difficult to disperse in water. Therefore, polyisocyanates having hydrophilic groups are being developed (for example, Patent Document 1 and Patent Document 2). [0003] prior art literature [0004] patent documents [0005] Patent Document 1: Japanese Patent Application Laid-Open No. 9-328654 [0006] Patent Document 2: International Publication No. 2001 / 088006 Pamphlet Contents of the invention [0007] The pro...

Claims

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Application Information

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IPC IPC(8): C08G18/12C08G18/44C08G18/80
CPCC08G18/44C08G18/792C08G18/8077C08G18/808C08G18/283
Inventor 三轮祐一辻田隼也
Owner ASAHI KASEI KOGYO KK
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