Polyurethane resin composition for sealing optoelectric conversion devices

A technology of polyurethane resin and resin composition, which is applied in the field of polyurethane resin, and can solve problems such as poor weather resistance stability and blackening of silver parts

Inactive Publication Date: 2002-08-21
MITSUI CHEM INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since it contains sulfur, it has poor weather resistance stability, and when introduced into LEDs, silver parts used in LED lamps tend to be vulcanized and turn black when a voltage is applied to the LEDs

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation Embodiment 1

[0235] Preparation Example 1 (Synthesis of Polyol A)

[0236] 680.2 g of pentaerythritol and 86.23 g of potassium hydroxide were added to a pressure vessel (hereinafter referred to as an autoclave) under a nitrogen atmosphere equipped with a stirrer, a temperature controller, a barometer, a nitrogen introduction tube, and a monomer introduction tube. . The autoclave was then replaced with nitrogen at room temperature, thereby reducing the internal pressure to 6.55 kPa. Then 897.3 g of propylene oxide was added in one portion, and the mixture was gradually heated to 115° C. with stirring, at which temperature the reaction was continued until no change in autoclave pressure was observed. Then, the pressure of the autoclave was lowered at the same temperature and kept at 665 Pa for 30 minutes to recover unreacted propylene oxide, and thus, crude polyol A was obtained.

[0237] Then, the crude polyol A was added to a separable flask (hereinafter referred to as "separable flask")...

preparation Embodiment 2

[0239] Preparation Example 2 [Synthesis of Polyurethane Prepolymer Terminated with Isocyanate Group (A-1)]

[0240] Mix 893.4g of "'COSMONATE' (registered trade name) NBDI" (2,5-diisocyanatomethylbicyclo[2.2.1]heptane and 2,6-diisocyanatomethylbicyclo[2.2.1]heptane A mixture of cyclo[2.2.1]heptane, produced by Mitsui Chemicals, Inc., hereinafter referred to as "NBDI") was added to a 1-liter separable flask equipped with a stirrer which had been dried and replaced with nitrogen, and 106.6 g Polyol A obtained in Preparation Example 1. Under the protection of nitrogen flow, the mixture was reacted at 100° C. for 8 hours, and then stored at room temperature for one day. Therefore, an isocyanate group-terminated polyurethane prepolymer (A-1) with an NCO% of 30.0 was obtained.

preparation Embodiment 3

[0241] Preparation Example 3 [Synthesis of isocyanate group-terminated polyurethane prepolymer (A-2)]

[0242] 833.6 g of NBDI was charged into the same apparatus as in the above preparation of the isocyanate group-terminated polyurethane prepolymer of Preparation Example 1, and 166.4 g of Polyol A obtained in Preparation Example 1 was added thereto. Under the protection of nitrogen flow, the mixture was reacted at 100° C. for 8 hours, and then stored at room temperature for one day. Therefore, an isocyanate group-terminated polyurethane prepolymer (A-2) with an NCO% of 24.0 was obtained.

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Abstract

A urethane resin composition for sealing optoelectric conversion devices which is prepared from a component (A) containing an isocyanate compound and a component (B) containing a hydroxyl compound, characterized in that the isocyanate compound is at least one compound selected from the group consisting of aromatic isocyanates having structures where none of the isocyanate groups are bonded directly to the benzene rings, aliphatic isocyanates, alicyclic isocyanates, and mixture of them.

Description

technical field [0001] The present invention relates to a polyurethane resin used in a photoelectric conversion element sealant, a polyurethane resin composition, its use and a preparation method. More specifically, the present invention relates to a polyurethane resin for a photoelectric conversion element sealant having excellent weather resistance and little discoloration, a polyurethane resin composition for a photoelectric conversion element sealant having good workability, the polyurethane resin being A photoelectric conversion device and a light-emitting or light-receiving device used as a sealant, and uses of the device and a production method thereof, and a light-emitting diode lamp and a production method thereof. technical background [0002] Hitherto, to prevent optical semiconductors such as diodes, transistors, or ICs from being exposed to air, hermetic sealing using metal, ceramics, glass, etc., or resin sealing using resin has been performed. Of course, herm...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/10C08G18/75C08G18/76C08G18/79H01L33/56
CPCC08G18/7621C08G18/792H01L2924/0002C08G2190/00C08G18/76C08G18/758C08G18/7642C08G18/757C08G18/10H01L33/56C08G18/48H01L2924/00C08G18/73C08G18/75
Inventor 川那部恒女鹿泉山崎聪山田国博岛巢正昭伊藤尚登
Owner MITSUI CHEM INC
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