Title:
INJECTION MOLDED BODY AND MIRROR
Document Type and Number:
Japanese Patent JP2017129874
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide an injection molded body having small thermal expansion property and smooth surface, and to provide a mirror.SOLUTION: There are provided an injection molded body obtained by injection molding a cycloolefin resin composition, where the cycloolefin resin composition contains at least a cycloolefin resin and silica particles surface treated with hexamethyldisilazane, an average primary particle diameter of the silica particles is 10 nm or more and 150 nm or less (excluding 10 nm or more and 30 nm or less), the cycloolefin resin composition contains 15 mass% or more and 70 mass% or less of the silica particles, and the molded body has a coefficient of linear expansion at 0°C-80°C of 50×10/°C or less and square average surface roughness (Rq) of 4 nm or less.SELECTED DRAWING: None
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Inventors:
HOSOKAWA KATSUMOTO
KOJIMA TAKAHIRO
KOJIMA TAKAHIRO
Application Number:
JP2017046634A
Publication Date:
July 27, 2017
Filing Date:
March 10, 2017
Export Citation:
Assignee:
CANON KK
International Classes:
G02B5/08; C08K9/06; C08L45/00; C08L65/00; G02B1/04
Domestic Patent References:
| JP2007070564A | 2007-03-22 | |||
| JP2007187840A | 2007-07-26 | |||
| JP2008033188A | 2008-02-14 | |||
| JP2006188677A | 2006-07-20 |
Foreign References:
| WO2006051699A1 | 2006-05-18 | |||
| WO2011040186A1 | 2011-04-07 | |||
| WO2008035521A1 | 2008-03-27 | |||
| WO2008120745A1 | 2008-10-09 | |||
| US20050040376A1 | 2005-02-24 |
Attorney, Agent or Firm:
Takuma Abe
Sogo Kuroiwa
Sogo Kuroiwa