Optical Resin Material and Optical Element

• US 20100216930A1
• Filed: 10/01/2008
• Published: 08/26/2010
• Est. Priority Date: 10/19/2007
• Status: Abandoned Application

• Current Assignee: Konica Minolta OPTO Incorporated (Konica Minolta Inc.)
• Original Assignee: Konica Minolta OPTO Incorporated (Konica Minolta Inc.)
• Inventors: Ihara, Kazuhito, Kikuchi, Masako
• Application Number:
  US12/738,423
• Publication Number:
  US 20100216930A1
• Time in Patent Office: Days
• US Class Current: 524/430
• CPC Class Codes: C08K 9/06 with silicon-containing compounds
• CPC Class Codes: C08L 83/04 Polysiloxanes
• CPC Class Codes: G02B 1/04 made of organic materials, e.g. plastics G02B1/08 takes precedence

Abstract

An optical resin material, which, while able to form a plastic optical element produceable at low cost, has excellent heat resistance and, at the same time, has excellent optical stability high enough to avoid a change in optical properties even after use for a long period of time, and an optical element using the optical resin material. The optical resin material contains a curable resin and hydrophobic oxide particles and is characterized in that it satisfies an absorbance intensity ratio B/A of not less than 0.01 and not more than 0.25, wherein A represents an absorbance intensity at 1720 cm⁻¹ in an infrared absorption spectrum of the optical resin material after curing; and B represents an absorbance intensity at 1637 cm⁻¹, and the volume average particle diameter of the hydrophobic oxide particles is not less than 1.0 nm and not more than 50 nm.

Claims

1. An optical resin material comprising a curable resin and hydrophobic oxide particles,

wherein

an absorbance intensity ratio B/A is 0.01 to 0.25, provided that A represents an absorbance intensity at 1720 cm⁻

1 of an infrared absorption spectrum of the optical resin material after cured, and B represents an absorbance intensity at 1637 cm<sup>−

1</sup> of the infrared absorption spectrum of the optical resin material after cured; and

a volume average particle diameter of the hydrophobic oxide particles is 1.0 nm to 50 nm.

2. The optical resin material of claim 1, wherein the curable resin is a thermally curable resin.

3. The optical resin material of claim 1, wherein the curable resin comprises an acryl monomer.

4. The optical resin material of claim 1, wherein surfaces of the hydrophobic oxide particles are subjected to a hydrophobic treatment with a silazane.

5. The optical resin material of claim 1, wherein surfaces of the hydrophobic oxide particles are subjected to a hydrophobic treatment with a silane coupling agent having a reactive group.

6. The optical resin material of claim 1, wherein surfaces of the hydrophobic oxide particles are subjected to a hydrophobic treatment with a chlorosilane.

7. An optical element molded by employing the optical resin material of claim 1.