POLYCARBONATE RESIN COMPOSITION, PROCESS FOR PRODUCING MOLDED PRODUCTS USING THE SAME, AND OPTICAL LENS

• US 20120095139A1
• Filed: 04/19/2010
• Published: 04/19/2012
• Est. Priority Date: 04/20/2009
• Status: Abandoned Application

• Current Assignee: Mitsubishi Gas Chemical Company Incorporated (Mitsubishi Electric Corporation)
• Original Assignee: Mitsubishi Gas Chemical Company Incorporated (Mitsubishi Electric Corporation)
• Inventors: Yoshida, Shu, Kato, Noriyuki, Furuhashi, Hiroki, Kaneko, Kazuaki, Kameyama, Keiichi
• Application Number:
  US13/265,232
• Publication Number:
  US 20120095139A1
• Time in Patent Office: Days
• US Class Current: 524/91
• CPC Class Codes: C08K 5/103 with polyalcohols
• CPC Class Codes: C08K 5/13 Phenols; Phenolates
• CPC Class Codes: C08K 5/3475 condensed with carbocyclic rings
• CPC Class Codes: C08L 69/00 Compositions of polycarbonates; Compositions of derivatives of polycarbonates
• CPC Class Codes: G02B 1/041 Lenses

Abstract

To provide a polycarbonate resin which is excellent in transparency, hue and ultraviolet-resistance of the molded product, is excellent in retention-stability at a high temperature, and causes sufficiently-reduced amount of the dirt on the metal mold during molding.

A polycarbonate resin composition comprising A) a polycarbonate resin which is produced according to a melt method without adding any quencher, which comprises a constitution unit derived from 9,9-bis (4-(2-hydroxy ethoxy)phenyl)fluorene and a constitution unit derived from bisphenol A, B) a benzotriazole ultraviolet absorber, C) a mold release which is a partial ester formed of a C_10-20 monovalent fatty acid and glycerol, and D) a hindered phenol antioxidant.

Claims

1. A polycarbonate resin composition, comprising:

A) 100 parts by weight of a polycarbonate resin produced by a melt method without adding any quencher, wherein the polycarbonate resin comprises

51 to 99% by mole of a constitution unit derived from 9,9-bis (4-(2-hydroxy ethoxy)phenyl)fluorene represented by formula (1), and

1 to 49% by mole of a constitution unit derived from bisphenol A represented by formula (2);

B) 0.01 to 1.0 part by weight of a benzotriazole ultraviolet absorber;

C) 0.005 to 1 part by weight of at least one species of a mold release, which is a partial ester formed from a C_10-20 monovalent fatty acid and glycerol; and

D) 0.005 to 0.20 part by weight of at least one species of a hindered phenol antioxidant

2. The composition of claim 1, wherein the a benzotriazole ultraviolet absorber B) is 2-(2′

-hydroxy-5′

-t-octyl phenyl)benzotriazole or 2,2′

-methylene bis [4-(1,1,3,3-tetrabutyl)-6-(2H-benzotriazole-2-yl)phenol].

3. The composition of claim 1, wherein the at least one species of a mold release (C) is a glycerol monostearate or a glycerol monolaurate.

4. The composition of claim 1, wherein the at least one species of a hindered phenol antioxidant D) is pentaerythrityl tetrakis[3-(3,5-di-t-butyl-4-hydroxy phenyl)propionate].

5. A process for producing a molded product, the process comprising molding an object with the polycarbonate resin composition of claim 1.

6. An optical lens, comprising the polycarbonate resin composition of claim 1.

7. A process for producing a molded product, the process comprising molding an object with the polycarbonate resin composition of claim 2.

8. A process for producing a molded product, the process comprising molding an object with the polycarbonate resin composition of claim 3.

9. A process for producing a molded product, the process comprising molding an object with the polycarbonate resin composition of claim 4.

10. An optical lens, comprising the polycarbonate resin composition of claim 2.

11. An optical lens, comprising the polycarbonate resin composition of claim 3.

12. An optical lens, comprising the polycarbonate resin composition of claim 4.