Polycarbonate resin composition, and molded article and method for manufacturing same

Patent metadata

Field	Value
Publication number	US-10035899-B2
Application number	US-201515315126-A
Country	US
Kind code	B2
Filing date	Apr 2, 2015
Priority date	Jun 11, 2014
Publication date	Jul 31, 2018
Grant date	Jul 31, 2018

Abstract

According to an embodiment, provided is a polycarbonate resin composition containing a polycarbonate resin, wherein a molded product of the polycarbonate resin composition has an integrated value of an amount of chemiluminescence derived from organic peroxide of 4,000 to 12,000 counts per mg of the molded product, and the integrated value of the amount of chemiluminescence is a value obtained by integrating the amount of chemiluminescence at a wavelength of 405 to 650 nm that is measured during 480 seconds in which under a nitrogen atmosphere the temperature is raised from 100° C. to 350° C. at a rate of 50° C./minute and thereafter is maintained at 350° C. for 180 seconds.

First claim

The invention claimed is:

1. A polycarbonate resin molded product, comprising a polycarbonate resin composition wherein
the integrated value of the amount of chemiluminescence derived from organic peroxide is 4,000 to 12,000 counts per mg of the molded product, and
the integrated value of the amount of chemiluminescence is a value obtained by integrating the amount of chemiluminescence at a wavelength of 405 to 650 nm that is measured during 480 seconds in which under a nitrogen atmosphere the temperature is raised from 100° C. to 350° C. at a rate of 50° C./minute and thereafter is maintained at 350° C. for 180 seconds,
transmittance of light in the ultraviolet region and light in the short wavelength region of visible light is 70% or less, and yellowness (YI value) is 29 or less,
molding is performed by extrusion with an extrusion screw, and
a ratio (Q/Ns value) of discharge rate (Q in kg/hr) during extrusion with respect to rotational speed (Ns in rpm) of the extruder screw is 0.2 to 0.7 when the screw has a diameter of 50 mm or less, and 1 to 2 when the screw has a diameter exceeding 50 mm.

2. A method for producing the polycarbonate resin molded product according to claim 1 , comprising:
(a) mixing the polycarbonate resin with an additive including an antioxidant to obtain a mixture;
(b) molding the mixture in the presence of an inert gas to obtain pellets; and
(c) molding the pellets to obtain the polycarbonate resin molded product.

3. An eyeglass lens comprising the polycarbonate resin molded product according to claim 1 .

4. A front surface plate for a display, comprising the polycarbonate resin molded product according to claim 1 .

5. A substrate for fluorescence detection analysis, comprising the polycarbonate resin molded product according to claim 1 .

6. A light guide plate comprising the polycarbonate resin molded product according to claim 1 .

Assignees

• Mitsubishi Gas Chemical Co

Inventors

• Tokita Atsuhiro

Classifications

• G02B6/0065

  Manufacturing aspects; Material aspects · CPC title

• C08G64/00

  Macromolecular compounds obtained by reactions forming a carbonic ester link in the main chain of the macromolecule (polycarbonate-amides C08G69/44; polycarbonate-imides C08G73/16) · CPC title

• C09K11/02 Primary

  Use of particular materials as binders, particle coatings or suspension media therefor · CPC title

• C09K11/07

  having chemically-interreactive components, e.g. reactive chemiluminescent compositions · CPC title

• B29B9/10

  by moulding the material, i.e. treating it in the molten state · CPC title