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Urethane resin particles

一种聚氨酯树脂、颗粒的技术，应用在聚脲/聚氨酯涂料、涂层、乳胶漆等方向，能够解决不足储存稳定性、难以获得涂膜储存稳定性物理性质等问题，达到优异储存稳定性、增强储存稳定性、增强耐溶剂性的效果

Pending Publication Date: 2018-04-17
KANSAI PAINT CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] However, the polyurethane resins disclosed in PTL 2 may have insufficient storage stability when used in coating compositions and the like
Therefore, it may be difficult to obtain sufficient storage stability and desired physical properties of the resulting coating film

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0104] In terms of production stability and flexibility of the coating film obtained, the polyurethane prepolymer preferably has 0 to 100 mgKOH / g, particularly preferably 0 to 50 mg KOH / g, more particularly preferably 0 to 30 mg KOH / g and even more particularly preferably 0 to an acid value of 10mgKOH / g.

[0105] In terms of manufacturability, the polyurethane prepolymer preferably has a number-average molecular weight of 2,000 to 50,000, particularly preferably 2,000 to 30,000 and very particularly preferably 5,000 to 20,000.

[0106] Synthesis of Polyurethane Resin Particles

[0107] The present invention can be obtained by adding deionized water optionally with a neutralizing agent for ion-forming groups to a polyurethane prepolymer for water dispersion (emulsification), and if necessary, further performing a chain extension reaction and removing the solvent. An aqueous dispersion of inventive core-shell polyurethane resin particles.

[0108] The neutralizing agent is n...

Embodiment 1A

[0239] 62.3 parts of ETERNACOLL UH-100 (trade name, produced by Ube Industries, Ltd., 1,6-hexanediol-based polycarbonate diol, molecular weight: about 1,000) and 8.3 parts of dimethylolpropionic acid (the For the production of polyurethane resin (II) starting material), 0.1 part of NEOSTANN U-600 (trade name, produced by Nitto Kasei Co., Ltd., bismuth catalyst) and 200 parts of methyl ethyl ketone solvent were placed in a thermometer equipped with a thermometer , thermostat, stirrer and reflux condenser in the reaction vessel. After raising the temperature to 80°C with stirring, 29.4 parts of hydrogenated MDI (4,4'-dicyclohexylmethane diisocyanate) were added dropwise over a period of 30 minutes.

[0240] Then, while maintaining the temperature at 80° C., the reaction was performed until an NCO value of 1 mg / g or less was achieved.

[0241] The obtained polyurethane resin (II) had a number average molecular weight of 8000.

[0242] 76.7 parts of "PTMG-1000" (trade name, prod...

Embodiment 2A to Embodiment 18A and comparative example 1A to comparative example 3A

[0249] Aqueous dispersions of polyurethane resin particles No. 2A to No. 21A were obtained in the same manner as in Example 1A, but changing the composition as shown in Table 1 and Table 2 below. Tables 1 and 2 below include property values ​​of the obtained aqueous dispersions of polyurethane resin particles.

[0250] The following Tables 1 and 2 show the composition ratios of each of the polyurethane resin (II) and the polyurethane resin (I) based on the total amount of the components of the respective resins (regarded as 100).

[0251] In the production method, the NCO value at the end of the reaction and the amount of methyl ethyl ketone solvent are appropriately adjusted according to the formula.

[0252] Aqueous dispersions of polyurethane resin particles No. 19A to No. 21A were used in Comparative Examples.

[0253] assessment test

[0254] The polyurethane resin particles 1A to 21A obtained in Example 1A to Example 18A and Comparative Example 1A to Comparative Exam...

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PUM

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Abstract

The problem to be solved by the present invention is to provide urethane resin particles which enable, if used as a constituent of a coating material composition, the coating material composition to have excellent storage stability and to have excellent degree of freedom of adjustment of physical properties of a coating film. The present invention provides core / shell type urethane resin particleswhich have a core / shell structure, and which use a polyether polyol as a polyol component of a urethane resin that constitutes the core part, while using a polycarbonate polyol as a polyol component of a urethane resin that constitutes the shell part.

Description

technical field [0001] Cross References to Related Applications [0002] This application claims priority from Japanese Patent Application No. 2015-171713 filed on September 1, 2015 and Japanese Patent Application No. 2015-219582 filed on November 9, 2015 (the entire contents of which are incorporated by reference into this article). [0003] The present invention relates to polyurethane resin particles which, when used as a component of a coating composition, can provide a coating composition having excellent storage stability and capable of forming a coating film having excellent physical properties and an excellent finished appearance . The present invention also relates to a coating composition comprising the polyurethane resin particles. Background technique [0004] Polyurethane resin particles having excellent physical properties have been widely used as resin particles used in coating compositions, for example, to improve coating film properties. [0005] In orde...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/00C08G18/40C09D5/02C09D175/04C09D201/00
CPCC09D5/02C08G18/6229C08G18/6659C08G18/6677C08G18/6692C08G18/73C08G18/755C08G18/8077C08G18/0823C08G18/0828C08G18/10C08G18/12C09D175/06C09D175/08C08G18/3206C08G18/3228C08G18/348C08G18/3857C08G18/4018C08G18/4063C08G18/4216C08J3/126C08J2375/04C08G18/44C08G18/4854C09D201/00C09D175/04
Inventor 神田崇史
Owner KANSAI PAINT CO LTD
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