Cycloolefin resin composition, molded article thereof, and mirror
AssigneeCanon Kabushiki Kaisha
InventorsKatsumoto Hosokawa, Takahiro Kojima
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Abstract
A molded article is formed by molding a cycloolefin resin composition, in which the cycloolefin resin composition contains a cycloolefin resin and silica particles, the silica particles have an average primary particle size of 10 nm to 150 nm, the cycloolefin resin composition has a silica particle content of 15% by weight to 70% by weight, and the molded article has a linear expansion coefficient of 50×10−6/degrees (Celsius) or less in the temperature range of 0 degrees (Celsius) to 80 degrees (Celsius).
Claims10
A molded article formed by molding a cycloolefin resin composition,
- wherein the cycloolefin resin composition contains a cycloolefin resin and silica particles,
- wherein the silica particles have an average primary particle size of 10 nm to 150 nm,
- the cycloolefin resin composition has a silica particle content of 15% by weight to 70% by weight, and
- the molded article has a linear expansion coefficient of 50×10−6/degrees (Celsius) or less in the temperature range of 0 degrees (Celsius) to 80 degrees (Celsius).
A mirror comprising:
- a molded article formed by molding a resin composition;
- and
- a reflective layer arranged on an optically effective surface of the molded article,
- wherein the resin composition is a cycloolefin resin composition containing a cycloolefin resin and silica particles,
- wherein the silica particles have an average primary particle size of 10 nm to 150 nm,
- the cycloolefin resin composition has a silica particle content of 15% by weight to 70% by weight, and
- the molded article has a linear expansion coefficient of 50×10−6/degrees (Celsius) or less in the temperature range of 0 degrees (Celsius) to 80 degrees (Celsius).
A cycloolefin resin composition comprising:
- a cycloolefin resin;
- and
- silica particles,
- wherein the silica particles have an average primary particle size of 10 nm to 150 nm, and
- the cycloolefin resin composition has a silica particle content of 15% by weight to 70% by weight.
Dependencies are inferred from the claim text.