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Polycarbonate resin composition

A technology of polycarbonate resin and composition, which is applied in the fields of instruments, organic chemistry, optics, etc., and can solve problems such as ignorance of polycarbonate resin composition, large amount of gas generation, large compounding volume, etc.

Pending Publication Date: 2019-07-16
MITSUBISHI ENG PLASTICS CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, there is no known polycarbonate resin composition that is actually effective in absorbing and blocking wavelengths of 400 to 420 nm
[0006] In addition, when it has been obtained to block light with a wavelength of 420 nm using a conventional ultraviolet absorber such as the above, its large compounding amount causes a problem of a large amount of gas generation at the time of molding
[0007] A resin composition comprising a polycarbonate resin and such an ultraviolet absorber is known, but a polycarbonate resin composition capable of effectively absorbing and blocking a wavelength of 400 to 420 nm while having no problem of gas generation during molding is currently unknown

Method used

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  • Polycarbonate resin composition
  • Polycarbonate resin composition
  • Polycarbonate resin composition

Examples

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example

[0140] The following are preferred examples of compounds represented by the general formula (2) and having a maximum absorption wavelength of 360 nm or more and less than 375 nm: 6-(2H-benzotriazol-2-yl)benzo[1,3]dioxa Cyclopenten-5-ol, 6-(5-n-heptylcarbonyloxyethyl-2H-benzotriazol-2-yl)benzo[1,3]dioxol-5-ol , 6-(5-isoheptylcarbonyloxyethyl-2H-benzotriazol-2-yl)benzo[1,3]dioxol-5-ol, 6-(5-methyl Base-2H-benzotriazol-2-yl)benzo[1,3]dioxol-5-ol, 6-(5-methoxy-2H-benzotriazol-2-yl ) benzo[1,3]dioxol-5-ol, 6-(5-hydroxy-2H-benzotriazol-2-yl)benzo[1,3]dioxol -5-ol, 6-(5-octyloxy-2H-benzotriazol-2-yl)benzo[1,3]dioxol-5-ol, 6-(5-carboxy- 2H-benzotriazol-2-yl)benzo[1,3]dioxol-5-ol, 6-(5-hydroxyethyl-2H-benzotriazol-2-yl)benzene And[1,3]dioxol-5-ol, and 6-(5-methylcarbonyloxyethyl-2H-benzotriazol-2-yl)benzo[1,3]di Oxol-5-ol.

[0141] Among the foregoing, 6-(2H-benzotriazol-2-yl)benzo[1,3]dioxol-5-ol, 6-(5-n-heptylcarbonyloxyethyl- 2H-Benzotriazol-2-yl)benzo[1,3]dioxol-5-ol, and 6-(...

specific example

[0152] The ultraviolet absorber (B3) is more preferably a benzotriazole-based ultraviolet absorber and particularly preferably a benzotriazole-based compound not having a sesamol group. The following are preferred specific examples of such benzotriazole compounds: 2-(2-hydroxy-5-tert-octylphenyl)-2H-benzotriazole, 2-(3-tert-butyl-2-hydroxy -5-methylphenyl)-5-chloro-2H-benzotriazole, 2-[5-chloro(2H)-benzotriazol-2-yl]-4-methyl-6-(tert-butyl base) phenol, 2,4-di-tert-butyl-6-(5-chlorobenzotriazol-2-yl)phenol, (2-[5-chloro(2H)-benzotriazol-2-yl ]-4,6-di(tert-amyl)phenol), 3-[3-tert-butyl-5-(5-chloro-2H-benzotriazol-2-yl)-4-hydroxyphenyl]octyl Propionate, 2-(3-tert-butyl-5-methyl-2-hydroxyphenyl)-5-chlorobenzotriazole, 2-(2H-benzotriazol-2-yl)- 6-dodecyl-4-methylphenol, 2-(2H-benzotriazol-2-yl)-p-cresol, 2-[(2H)-benzotriazol-2-yl]-4 ,6-bis(1-methyl-1-phenethyl)phenol.

[0153] The preferred content of the ultraviolet absorber (B3) is 0.01 to 0.02 parts by mass relative to 100 pa...

Embodiment 1 to 22、 comparative example 1 to 9

[0227] [Manufacture of resin composition pellets]

[0228] The components given in Table 1 were blended in the ratios (parts by mass) indicated in Tables 2 to 4 and mixed with a tumbler mixer for 20 minutes. Then melt kneading was carried out by a vented single-screw extruder ("VS-40" of Tanabe Plastics Machinery Co., Ltd.) having a screw diameter of 40 mm at a barrel temperature of 280° C., and the polymer was obtained by strand cutting. Pellets of carbonate resin composition.

[0229] [Measurement of transmittance and absorbance]

[0230] The obtained pellets were dried at 120° C. for 5 hours using a hot air circulation dryer, followed by molding at a resin temperature of 280° C., a mold temperature of 80° C., and 30 seconds by an injection molding machine ("SE50DUZ" of Sumitomo Heavy Industries, Ltd.) Under cyclic conditions, a stepped flat-shaped test piece with a width of 50 mm, a length of 90 mm, and three thicknesses of 1 mm, 2 mm, and 3 mm was formed.

[0231] The t...

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Abstract

Provided is a polycarbonate resin composition which is capable of blocking, in addition to ultraviolet light, light closer to visible light and having a wavelength of 400 to 420 nm, and which does nothave the problem of gas generation when being molded. The polycarbonate resin composition is characterized by comprising, with respect to 100 parts by mass of a polycarbonate resin (A): (i) 0.02 to 1part by mass of a benzotriazole ultraviolet absorber (B1) which has a sesamol group, conforms to JIS K7105, and has a maximum absorption wavelength of an absorption curve determined from the formulaof 375 nm or greater, or (ii) 0.08 to 1 part by mass of a benzotriazole ultraviolet absorber (B2) which has a sesamol group, conforms to JIS K7105, and has a maximum absorption wavelength of an absorption curve determined from the formula of 360 nm or greater and less than 375 nm; and 0.01 to 0.5 parts by mass of a stabilizer (C).

Description

technical field [0001] The present invention relates to a polycarbonate resin composition, and more particularly, to a polycarbonate resin composition capable of blocking light having a wavelength of 400 to 420 nm on the visible side of ultraviolet light and having no problem of gas generation during molding. Background technique [0002] The eyes are often exposed to damage from sunlight, so it is important to protect the eyes from ultraviolet light whose wavelength extends to 400nm. In addition, recent studies have shown that the wavelength band on the visible side near ultraviolet light can also damage eye tissues and be the cause of, for example, cataracts. Furthermore, as machines or lighting using LEDs as light sources become more common, blue light present in large quantities in LED light sources has also been reported as a cause of eye diseases. [0003] Therefore, there is a need for a material that blocks ultraviolet light as well as light of a wavelength of 400 t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L69/00C08K5/3475C08K5/49C07D405/04
CPCC08K5/3475C08K5/527C08K2201/014C08L2201/08C08L69/00C07D405/10G02B1/041C08K5/005C08G64/06G02B1/04G02B5/22G02B5/208C07D405/04C08K5/49
Inventor 茂木笃志
Owner MITSUBISHI ENG PLASTICS CORP
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