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Composition and cured product thereof

A composition and cured product technology, applied in coatings, polyurea/polyurethane coatings, etc., can solve the problems of film appearance deterioration, film peeling, etc., and achieve excellent appearance, excellent scratch resistance and chemical resistance, The effect of high surface hardness

Pending Publication Date: 2022-07-22
DAICEL CHEM IND LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, in recent years, when chemicals such as sunscreens come into contact with a coating made of polyurethane resin, peeling of the coating or deterioration of the appearance of the coating has become a problem.

Method used

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  • Composition and cured product thereof
  • Composition and cured product thereof
  • Composition and cured product thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0130] Hereinafter, the present disclosure will be described more specifically with reference to examples, but the present disclosure is not limited by these examples.

Synthetic example 1

[0132] Under a nitrogen atmosphere, a five-necked flask was charged with tris(2-hydroxyethyl)isocyanurate (783.6 g), ε-caprolactone (CLM) (2216.4 g), and stannous octoate (5 ppm) , the temperature was raised to 170 °C to carry out the polymerization reaction. After confirming that the residual CLM concentration was less than 1.0% by analysis by gas chromatography, cooling was performed. Thus, compound (a1-1) was obtained (Mw / Mn=1.3, Mn=1068, viscosity 4.4 [Pa·s / 25°C], hydroxyl value 169.2 [KOHmg / g]).

Synthetic example 2

[0134] Compound (a1-2) was obtained in the same manner as in Synthesis Example 1, except that tris(2-hydroxyethyl)isocyanurate (209.0 g), CLM (791.0 g), and stannous octoate (5 ppm) were used. (Mw / Mn=1.5, Mn=1241, viscosity 3.7 [Pa·s / 25°C], hydroxyl value 135.1 [KOHmg / g]).

[0135]In addition, the molecular weight distribution of the obtained compound was measured using a high-efficiency GPC apparatus, and the number-average molecular weight (Mn) and the weight-average molecular weight (Mw) were obtained from comparison with a polystyrene standard, and the molecular weight dispersion was calculated. (Mw / Mn).

[0136] The measurement conditions are as follows.

[0137] Measurement apparatus: High-efficiency GPC apparatus "HLC-8220GPC", manufactured by Tosoh Co., Ltd.

[0138] Mobile phase: tetrahydrofuran.

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PUM

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Abstract

The present disclosure provides a composition capable of forming a cured product having excellent adhesion to a substrate, hardness, scratch resistance, and drug resistance. This composition contains: a polyol compound (A) containing a compound (a1) that is a compound represented by formula (1) and has a number average molecular weight (in terms of standard polystyrene) of 800 or more, in which R1 to R3 are groups represented by formula (1a); the isocyanate compound (B) contains a polyisocyanate compound having an isocyanurate skeleton.

Description

technical field [0001] The present disclosure relates to a composition for forming a polyurethane resin and a cured product thereof. This application claims the priority of Japanese Patent Application No. 2019-168878 for which it applied in Japan on September 17, 2019, The content is used here. Background technique [0002] Polyurethane resin has flexibility, stretchability, and strength. A composition forming a urethane resin having such properties is used, for example, for a coating agent or the like. [0003] As the coating agent, for example, a coating agent for use in covering a plastic substrate such as a vehicle member and an electronic device is required to have adhesion to the substrate, hardness, and scratch resistance. of the coating. As such a coating agent, there are known ε-caprolactone modified products containing tris(2-hydroxyethyl)isocyanurate and alicyclic, aliphatic, or Compositions of aromatic diisocyanates. [0004] However, in recent years, when a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/66C08G18/42C08G18/32C08G18/79C09D175/06
CPCC08G18/6633C08G18/3853C08G18/4277C08G18/791C09D175/06C09D7/20C08L83/04C09D7/47C08G18/792C08G18/4661C08G18/4202C08K5/04C08J2475/04C08J2367/02C08J7/0427C08G18/10C09D175/08C08J7/04C09D7/65C08G18/244C08G18/34C09D175/04
Inventor 绀野贵史前津成俊渡部淳畑中慎太郎
Owner DAICEL CHEM IND LTD