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Film and uses thereof

a technology of film and resin, applied in the field of film, can solve the problems of difficulty in controlling the degree of polymerization and thickness, difficulty in maintaining the quality and cost of resin made films, and difficulty in maintaining the degree of polymerization and cost, etc., and achieves excellent balance of mechanical characteristics toughness, hardness, dimensional stability, and the effect of small deformation and the like during processing

Inactive Publication Date: 2012-09-06
MITSUI CHEM INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0024]The film of the present invention is excellent in a balance among high refractive index, low birefringence and light transmittance, and further excellent in a balance of mechanical characteristics toughness, hardness, dimensional stability and the like, so that effects of deformation and the like during processing are very small, while the film is further excellent in solvent resistance as well, so that the film can be used as various optical films.

Problems solved by technology

However, the resin as disclosed in the above document 3 involves many steps in synthesis, so that there are problems in maintenance of a quality and the cost when the resin is made into a film.
Furthermore, a method of forming a film from the resin described in the above document 3 also requires extra effort and the cost for removing the solvent at the time of production thereof due to cast (solution casting) with a solution after completion of polymerization, there are difficulties in controlling the degree of polymerization and thickness, and there are many rooms for improvement in a balance among refractive index, birefringence and light transmittance of the formed film.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

production example 1

[0097]A polythiol compound (B-2) containing 5,7-dimercaptomethyl-1,11-dimercapto-3,6-trithiaundecane, 4,7-dimercaptomethyl-1,11-dimercapto-3,6-trithiaundecane and 4,8-dimercaptomethyl-1,11-dimercapto-3,6-trithiaundecane was synthesized in accordance with the method described in Example 1 of Japanese Laid-open Patent Publication No. 1995-252207.

production example 2

[0098]A polythiol compound (B-3) containing 1, 1, 3, 3-tetrakis (mercaptomethylthio) propane, 4, 6-bis (mercaptomethylthio) -1, 3-dithiane and 2-(2, 2-bis (mercaptomethylthio) ethyl) -1, 3-dithiethane was synthesized in accordance with the method described in Production Example 2 of Japanese Laid-open Patent Publication No. 2004-2820.

example 1

[0099]10.5 mg of dibutyltin dichloride as a catalyst and 70 mg of Zelec UN (product name, acid phosphoric acid alkyl ester, a product of Stepan Company) as an internal release agent were added to 36.4 g of m-xylylene diisocyanate in advance, and the contents were dissolved to give a monomer mixed solution. Next, 33.6 g of 4-mercaptomethyl-1,8-dimercapto-3,6-dithiaoctane was added thereto, and the contents were well mixed to give a monomer mixed solution. The monomer mixed solution was degassed under reduced pressure for 1 hour. A Kapton tape of 80 μm was affixed to four sides of a blue plate glass in a frame shape to build a wall, the monomer mixed solution was added dropwise to the inside of the wall, and a plate glass of the same size was further placed from the top. It was confirmed that the inside of the Kapton tape wall was filled with the monomer mixed solution, and then two plates of glasses with the solution sandwiched between them were fixed with a clip. The resulting mater...

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Abstract

Disclosed is a film composed of a resin having a thiourethane bond, wherein the molar ratio (S / N) of sulfur to nitrogen contained in the resin is equal to or more than 0.8 and less than 3. According to the present invention, the film is excellent in a balance among high refractive index, low birefringence and light transmittance, and further excellent in a balance of mechanical characteristics such as toughness, hardness and dimensional stability, so that effects of deformation and the like during processing are very small, and the film is further excellent in solvent resistance as well.

Description

TECHNICAL FIELD[0001]The present invention relates to a film and uses of the film.BACKGROUND ART[0002]Patent Document 1 discloses an optical material composed of a thiourethane resin. Furthermore, Patent Document 2 discloses an optical material composed of polythiourethane produced by the use of a prescribed catalyst. According to the documents, these resins have a high refractive index and high transparency, and can be suitably used for optical lenses among optical materials.[0003]However, the documents do not disclose physical properties when a thiourethane resin is formed into a film at a thickness of equal to or less than 1 mm, and a method of controlling transmission of light as a whole by the use in contact with other materials in a thin film form. Furthermore, when these resins are made into a thin film, there are difficulties in coating from the viewpoint of reactivity of a raw material, and a method of obtaining a stable film or thin film is not reviewed either.[0004]Patent...

Claims

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Application Information

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IPC IPC(8): B32B27/40B29C45/00C08G18/38B29C39/00
CPCC08G18/3876C08J5/18C08J2375/04C09D175/04G02B1/111G02B5/021C08G18/7671G02B5/0841G02B5/208G02B5/3033C08G18/7621C08G18/7642G02B5/045Y10T428/31551C08G18/38G02B5/30G02F1/1335B29C41/003B29D11/00788B29K2075/00B29L2011/00G02B5/3083G02B1/18
Inventor ISHIKAWA, HISAKOMATSUDA, TOSHINORIONO, YOSUKEYAGI, KAZUOKAGAYAMA, AKIFUMI
Owner MITSUI CHEM INC