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Polyisocyanate composition and its production method, blocked polyisocyanate composition and its production method, resin composition, and cured product

A polyisocyanate and diisocyanate technology, applied in the fields of polyisocyanate composition and its manufacture, blocked polyisocyanate composition and its manufacture, resin composition, and cured products, can solve the problems such as polyisocyanate is difficult to disperse, and achieve excellent Effect of water resistance and heat resistance strength

Active Publication Date: 2020-02-11
ASAHI KASEI 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 and its production method, blocked polyisocyanate composition and its production method, resin composition, and cured product
  • Polyisocyanate composition and its production method, blocked polyisocyanate composition and its production method, resin composition, and cured product
  • Polyisocyanate composition and its production method, blocked polyisocyanate composition and its production method, resin composition, and cured product

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0182] Specific examples and comparative examples are shown below, and the present embodiment is described in more detail, but the present embodiment is not limited at all by the following examples and comparative examples within the scope not exceeding the gist thereof. Various physical properties and evaluations in Examples and Comparative Examples were measured and evaluated as follows.

[0183] (Properties 1) Yield

[0184] Using the polyisocyanate precursor as a sample, the yield of the polyisocyanate precursor was determined by measuring the refractive index of the reaction liquid.

[0185] (Properties 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] (Property 3) Isocyanate group concentration

[0188] In the Erlenmeyer flask, 1 to 3 g (Wg) of the polyisocyanate precursor was precisely weighed, an...

Embodiment 28～42

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

Embodiment 43～54

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

[0238] A rubber ring having a diameter of 2 cm was placed on the obtained coating film, and water was added dropwise thereto. In order to prevent volatilization, a watch glass was placed on the top, and it was left to stand at 23°C for 2 days. After 2 days, the water was removed, and the haze before and after the dropwise addition of water was measured. The haze value of the coating film was measured according to JIS K7361 using a trade name Haze meter manufactured by Suga Test Instruments Co., Ltd.

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

[0240] ○: The difference between the haze values ​​before and after the dropwise addition of water is less than 0.5, and the water resistance is good.

[0241] ×: The difference between the haze values ​​before and afte...

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PUM

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Abstract

The present invention provides a polyisocyanate composition obtained from polyisocyanate, polycarbonate diol and hydrophilic compound, said polyisocyanate is selected from the group consisting of aliphatic diisocyanate and alicyclic diisocyanate at least One type of diisocyanate is obtained, and one isocyanate group can react with one molecule of the hydrophilic compound in relation to the 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 two-component urethane coating composition of the normal temperature crosslinking type used as a solvent-based paint be water-based. However, in the two-liquid urethane coating composition, the polyisocyanate used as the curing agent is difficult to disperse in water. Therefore, polyisocyanates having a hydrophilic group are being developed (for example, Patent Document 1 and Patent Document 2). [0003] prior art literature [0004] Patent Literature [0005] Patent Document 1: Japanese Patent Application Laid-Open No. 9-328654 [0006] Patent Document 2: International Publication No. 2001 / 088006 Pamphlet SUMMARY OF THE INVENTION [0007...

Claims

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Application Information

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Patent Type & Authority Patents(China)
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 KK
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