Composition for optical material, optical material, process for producing the same, and lens

A technology of optical materials and compositions, applied in optics, optical components, instruments, etc., can solve problems such as the decrease in transparency of optical materials

Inactive Publication Date: 2005-10-19
NOF CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, since the pigment cannot be dissolved in the monomer composition when preparing the optical m...

Method used

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  • Composition for optical material, optical material, process for producing the same, and lens
  • Composition for optical material, optical material, process for producing the same, and lens
  • Composition for optical material, optical material, process for producing the same, and lens

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-8

[0086] After mixing the monomer components, ultraviolet absorber, pigment and surfactant shown in Table 1, impurities in the mixture were removed with a nylon filter (5 μm) to prepare an optical material composition. In addition, pigments and surfactants are mixed in advance to prepare a concentrated pigment solution by the following method. The stability of the prepared composition for optical materials was measured from the rate of change of the pigment concentration before and after filtering through the filter, and expressed in terms of visible light transmission (460 nm). The compositions prepared in Examples 1-8 are stable, and there is no change in pigment concentration after being placed at 40° C. for 30 days.

[0087] Next, after adding 0.6 g of IPP or 0.7 g of NPP as a polymerization initiator to 20 g of each of the prepared compositions, the mixture was poured into a mold consisting of two glass discs with a diameter of 7 cm and a glass disk with a thickness of 1.5 ...

Embodiment 9-17

[0101] Use the thick pigment solution that is prepared as pigment by the mixed system of 0.9g PB-100 (produced by Daiichi Chemical Industry Co., Ltd., particle size 0.3-2 μm) and 0.1g ルビクロン red 500RS (Tonn-Co., Ltd.), except press Except for the compositions shown in Table 2, compositions for optical materials were prepared in the same manner as in Examples 1-8, resin plates, test pieces, etc. were prepared from the compositions, and their physical properties were measured. The results are shown in Table 2.

[0102] In addition, the compositions for optical materials prepared in Examples 9-17 were stable, and there was no change in pigment concentration when left at 40° C. for 30 days. Moreover, the resin board has not been yellowed after being placed for 2 years.

[0103] Example

Embodiment 18-22

[0105] Except for the composition shown in Table 3, compositions for optical materials were prepared in the same manner as in Examples 9-17, resin plates, test pieces, etc. were prepared from the compositions, and their physical properties were measured. The results are shown in Table 3.

[0106] In addition, the compositions for optical materials prepared in Examples 18-22 were stable, and there was no change in pigment concentration when left at 40° C. for 30 days. Moreover, the resin board has not been yellowed after being placed for 2 years.

[0107] Example

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Abstract

An optical material which is reduced in coloration due to an ultraviolet absorber, is highly colorless and transparent, and has an excellent balance among material properties required of optical materials; a process for producing the optical material; a lens; and a composition to be used as a raw material for these optical materials. The composition comprises one or more monomers including a diallyl compound and additives including an ultraviolet absorber and an alcohol compound (1) represented by the formula (1): (1) wherein R<1>; is phenyl or substituted phenyl; and R<2> and R<3> each represents C1-3 alkyl or hydrogen.

Description

technical field [0001] The present invention relates to an optical material and a lens which are excellent in colorless transparency and can suppress coloring caused by an ultraviolet absorber, and to a method for preparing the optical material and the optical material used as a raw material for the above product with composition. Background technique [0002] In recent years, the lightness, safety, and fashionability of optical materials used for lenses have become more and more important, and the optical materials used have also shifted from traditional inorganic glasses to synthetic resins. As representative synthetic resin materials therein, generally known examples include: polydiethylene glycol diallyl carbonate (hereinafter referred to as PADC), polymethyl methacrylate (hereinafter referred to as PMMA), polycarbonate (hereinafter referred to as PC) etc. [0003] PADC and PMMA are superior to inorganic glass in terms of low specific gravity, impact resistance, and dy...

Claims

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Application Information

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IPC IPC(8): C08F2/44C08F18/00C08F18/18C08F299/04G02B1/04
CPCC08F18/18G02B1/041C08L31/00C08F2/44C08F290/06G02B1/04
Inventor 藤田隆范田中克佳高冈利明
Owner NOF CORP
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