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Photocurable material for sealing, sealing method, sealing material, and case using sealing material

A light-curable and sealing material technology, applied in chemical instruments and methods, sealing devices, transportation and packaging, etc., can solve the problems of unsuitable sealing materials for shells, and achieve good storage stability, high tensile strength, surface less viscous effect

Active Publication Date: 2015-07-01
BOSTIK SA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the contained oligomers and monomers were properly mixed and retested. As a result, as described in the comparative example of this specification, only an extremely hard sealing material with a hardness of 50 or more was obtained as a sealing material for a housing. material is not suitable

Method used

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  • Photocurable material for sealing, sealing method, sealing material, and case using sealing material
  • Photocurable material for sealing, sealing method, sealing material, and case using sealing material
  • Photocurable material for sealing, sealing method, sealing material, and case using sealing material

Examples

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Embodiment

[0125] The present invention will be described in detail below through reference examples and embodiments. Furthermore, these embodiments are only used to illustrate the present invention, and do not limit the present invention in any way.

[0126] [experiment method]

[0127] (1) Tensile strength and elongation at break

[0128] A sheet of a UV resin cured product with a thickness of 1 mm was punched into a No. 3 dumbbell in accordance with JIS K 6251 to prepare a test piece. A tensile test was carried out under the conditions of a test temperature of 23°C and a tensile speed of 100 m / min, and the tensile strength and elongation at break were measured.

[0129] ·Tensile strength at breaking point [MPa] = breaking strength / film cross-sectional area

[0130] ·Elongation [%] = (elongation at break / reference length [20mm])×100

[0131] (2) Hardness

[0132] According to JIS K 6253, the thickness of the UV resin cured product is about 1mm, and the thickness is about 10mm. The sample is meas...

Embodiment 1

[0146] 100 parts by weight of urethane acrylic oligomer A (manufactured by Nippon Synthetic Chemical Co., Ltd.: UV-3000B) with a weight average molecular weight of 18,000, and phenol acrylate as an acrylic monomer (manufactured by Daiichi Pharmaceutical Co., Ltd.: Nibe Frontea PHE-2) 60 parts by weight, pentaerythritol tetrakis(3-mercaptobutyrate) (manufactured by Showa Denko Co., Ltd.: Karena MT PE1) with a molecular weight of 544.8 as tetrafunctional (secondary) polythiol A, 8 parts by weight, viscosity Adjusting agent (manufactured by Nippon Aerosil Co., Ltd.: AEROSIL200) 8 parts by weight was uniformly vacuum-mixed with a stirrer, and then 1-hydroxy-cyclohexyl-phenyl-ketone (manufactured by BASF J. P. Co., Ltd.) was added as a photopolymerization initiator: イルガキュア 184) 2 parts by weight, 0.02 parts by weight of 1,4-benzenediol (manufactured by Mitsui Chemicals Co., Ltd.: hydroquinone) as a stabilizer, and uniformly mixed and deaerated with a stirrer to obtain the photocurable...

Embodiment 2

[0148] 100 parts by weight of urethane acrylic oligomer A (manufactured by Nippon Synthetic Chemical Co., Ltd.: UV-3000B) with a weight average molecular weight of 18,000, and phenol acrylate as an acrylic monomer (manufactured by Daiichi Pharmaceutical Co., Ltd.: Nibe Frontea PHE-2) 60 parts by weight, pentaerythritol tetrakis(3-mercaptobutyrate) (manufactured by Showa Denko Co., Ltd.: Karean MT PE1) with a molecular weight of 544.8 as tetrafunctional (secondary) polythiol A, 23 parts by weight, viscosity Adjusting agent (manufactured by Nippon Aerosil Co., Ltd.: AEROSIL200) 8 parts by weight was uniformly vacuum-mixed with a stirrer, and then 1-hydroxy-cyclohexyl-phenyl-ketone (manufactured by BASF J.P. イルガキュア 184) 2 parts by weight, 0.02 parts by weight of 1,4-benzenediol (manufactured by Mitsui Chemicals Co., Ltd.: hydroquinone) as a stabilizer, and uniformly mixed and deaerated with a stirrer to obtain the photocurable seal of the present invention material.

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Abstract

This photocurable material for sealing, which contains (A) an oligomer that contains a (meth)acryloyl group and has a weight average molecular weight of 10,000-30,000, (B) a (meth)acrylate monomer, (C) a polythiol compound, and if necessary, (D) a carbodiimide compound, has high recoverability from compression, high tensile strength, excellent flexibility, and if necessary, low hardness. Consequently, this photocurable material for sealing is capable of providing a sealing material that exhibits excellent sealing characteristics such as excellent airtightness and waterproof properties, while having less surface tackiness, and the like.

Description

Technical field [0001] The present invention relates to a photocurable sealing material, a sealing method, a sealing material, and a casing using the same. The present invention, more specifically, relates to a photocurable sealing material that can be cured to a deep part easily and instantaneously using ultraviolet rays or the like. Background technique [0002] In the housings of mobile phones, digital cameras, camcorders and other electronic products, refrigerators, air conditioners, washing machines and other home appliances, cameras, clocks and other precision equipment, etc., in recent years, customers have asked for products with high sealing characteristics such as water resistance and airtightness. The requirements are rising. In addition, for example, for mobile phones, hard resins such as nylon / GF have been used in the past. In recent years, more inexpensive general-purpose resins such as ABS or ABS / PC have been used. However, since ABS, ABS / PC, etc. are soft and ea...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K3/10C08F2/44C08F220/10C08F290/00
CPCC09K2200/0625C09K2003/1062C08F2/44C09K3/10C08F290/067C08F2/48C08F222/1065C08F220/1806C08F220/20
Inventor 中谷裕之上野精记关田和昌
Owner BOSTIK SA
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