polyurethane resin composition

A technology of polyurethane resin and composition, which is applied in the direction of plastic/resin/wax insulator, other chemical processes, chemical instruments and methods, etc. It can solve problems such as cracks and loss of flexibility of polyurethane resin, and achieve hardness suppression and excellent volume resistance value , the effect of high reliability

Active Publication Date: 2021-07-30
三悠瑞克株式会社
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The polyurethane resin used for the sealing of these parts has the problem that it loses its flexibility due to long-term cooling and heating cycles, and cracks occur. It is urgent to develop a part that can further reduce the temperature dependence of the elastic modulus and maintain it for a long time

Method used

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  • polyurethane resin composition
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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～11 and comparative example 1～6

[0267] Each component and 0.01 weight% of SC-5570 (silicone antifoaming agent) as an antifoaming agent were mix|blended according to the composition shown in Table 1, and various polyurethane resin compositions were prepared according to the following procedure.

[0268] The (B) polyol compound, (C) inorganic filler, (D) plasticizer, and (E) crosslinking shown in Table 1 were carried out at 2000 rpm using an autorotation / revolution mixer (degassing Rentaro, manufactured by THINKY Co., Ltd. agent, (F) defoamer and (G) polymerization catalyst were mixed for 1 minute.

[0269] The (A) polyisocyanate compound shown in Table 1 was added to the said mixing component, and it mixed for 1 minute at 2000 rpm using the autorotation / revolution mixer (defoaming Rentaro, manufactured by THINKY company). The obtained mixture was degassed, and each polyurethane resin composition of Examples 1-11 and Comparative Examples 1-6 was obtained.

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Abstract

The object of the present invention is to provide a polyurethane resin having excellent compatibility and workability and excellent cooling and heating cycle characteristics using a polybutadiene polyol having a hydroxyl value of 60 mgKOH / g or less. The present invention relates to a polyurethane resin composition containing (A) a polyisocyanate compound, (B) a polyol compound, (C) an inorganic filler, and (D) a plasticizer, the (B) polyol compound comprising (b1 ) a polybutadiene polyol having a hydroxyl value of 60 mgKOH / g or less, containing (C) 50 to 85 mass % of an inorganic filler, and (D) 1 to 30 mass % of a plasticizer relative to 100 mass % of the polyurethane resin composition. quality%.

Description

technical field [0001] The present invention relates to polyurethane resin compositions. Background technique [0002] In recent years, with the advancement of electronic circuit boards and electronic components, the stress on components caused by cooling and heating cycles has increased, and components that can maintain high heat resistance and long-term heat dissipation are required. [0003] The polyurethane resin used for the sealing of these parts has the problem that it loses its flexibility due to long-term cooling and heating cycles, resulting in cracks. There is an urgent need to develop a part that can further reduce the temperature dependence of the elastic modulus and maintain it for a long time. [0004] For example, Patent Documents 1 to 3 describe the use of polybutadiene polyols having a hydroxyl value of 20 to 120 mgKOH / g. However, these documents do not specifically disclose polyurethane resins using polybutadiene polyols having a hydroxyl value of 60 mgKO...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L75/04H01B3/30C08G18/08C08G18/65C08G18/69C08K3/013C08K5/11C09K3/10
CPCC08G18/08C08G18/65C08G18/69C08G18/75C08G18/76C08G18/79C08K3/013C08K5/11C08L75/04C09K3/10H01B3/30
Inventor 农宗辰己森崎晃叶狩奈津美
Owner 三悠瑞克株式会社
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