Light-shielding paint, light-shielding paint set, light-shielding film, optical element, method for producing light-shielding film, and method for producing optical element
AssigneeCanon Kabushiki Kaisha
InventorsReiko Kubota, Yoji Teramoto, Shuhei Yamamoto
Life of this patent
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Abstract
A light-shielding paint includes an epoxy group-containing compound, an inorganic fine particle, a coloring agent, and an amine curing agent. The ratio (A′/A) of the mass (A′) of the amine curing agent to the active hydrogen equivalent (A) of the amine curing agent and the ratio (E′/E) of the mass (E′) of the epoxy group-containing compound to the epoxy equivalent (E) of the epoxy group-containing compound satisfy 0.1≤[(A′/A)/(E′/E)]≤0.45.
Claims13
A light-shielding film produced from a light-shielding paint that comprises an epoxy group-containing compound, an inorganic fine particle, a coloring agent, and an amine curing agent,
- wherein a ratio (A′/A) of a mass (A′) of the amine curing agent to an active hydrogen equivalent (A) of the amine curing agent and a ratio (E′/E) of a mass (E′) of the epoxy group-containing compound to an epoxy equivalent (E) of the epoxy group-containing compound satisfy formula (1) below
- 0.1≤[(A′/A)/(E′/E)]≤0.45 Formula (1).
An optical element comprising a light-shielding film disposed on a portion of a base made of an optical material,
- wherein the light-shielding film is produced from a light-shielding paint that comprises an epoxy group-containing compound, an inorganic fine particle, a coloring agent, an amine curing agent, and a curing catalyst, and
- a ratio (A′/A) of a mass (A′) of the amine curing agent to an active hydrogen equivalent (A) of the amine curing agent and a ratio (E′/E) of a mass (E′) of the epoxy group-containing compound to an epoxy equivalent (E) of the epoxy group-containing compound satisfy formula (1) below
- 0.1≤[(A′/A)/(E′/E)]≤0.45 Formula (1).
A method for producing a light-shielding film, comprising:
- applying, onto a base, a light-shielding paint comprising an epoxy group-containing compound, an inorganic fine particle, a coloring agent, and an amine curing agent;
- and
- curing the applied light-shielding paint in an atmosphere of 20° C. or more and 200° C. or less,
- wherein a ratio (A′/A) of a mass (A′) of the amine curing agent to an active hydrogen equivalent (A) of the amine curing agent and a ratio (E′/E) of a mass (E′) of the epoxy group-containing compound to an epoxy equivalent (E) of the epoxy group-containing compound satisfy formula (1) below
- 0.1≤((A′/A)/(E′/E))≤0.45 Formula (1).
A method for producing an optical element comprising a light-shielding film disposed on a peripheral surface of a base made of an optical material, the method comprising:
- applying, onto the peripheral surface of the base, a light-shielding paint comprising an epoxy group-containing compound, an inorganic fine particle, a coloring agent, and an amine curing agent;
- and
- curing the applied light-shielding paint in an atmosphere of 20° C. or more and 200° C. or less,
- wherein a ratio (A′/A) of a mass (A′) of the amine curing agent to an active hydrogen equivalent (A) of the amine curing agent and a ratio (E′/E) of a mass (E′) of the epoxy group-containing compound to an epoxy equivalent (E) of the epoxy group-containing compound satisfy formula (1) below
- 0.1≤((A′/A)/(E′/E))≤0.45 Formula (1).
Dependencies are inferred from the claim text.