Curable composition and cured product

a composition and composition technology, applied in the field of curable composition and cured products, can solve the problems of poor yield, and achieve the effects of high abbe number, excellent crack resistance and releasability, and high abbe number

Active Publication Date: 2020-05-21
ASAHI GLASS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0026]According to the curable composition of the present invention, it is possible to obtain a cured product having a high Abbe number and being excellent in transparency, crack resistance and releasability. The cured product of the present invention has a high Abbe number and is excellent in transparency, crack resistance and releasability.

Problems solved by technology

Heretofore, a thermoplastic resin has also been used for similar reasons, but poor yield has been pointed out due to a spool or runner in its injection molding process.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

examples

[0166]The present invention will be described in detail with reference to Examples, but the present invention is not limited thereto. Ex. 1 to 18 are Examples of the present invention, and Ex. 19 to 26 are Comparative Examples.

[0167](Median Diameter of Surface-Modified Metal Oxide Particles (A))

[0168]The median diameter was obtained by using a particle size distribution measuring apparatus by a dynamic light scattering method (manufactured by Otsuka Electronics Co., Ltd., FPAR1000).

[0169](Mass Average Molecular Weight of Compound (C))

[0170]The mass average molecular weight was measured by using the following device under the following conditions.

[0171]GPC system: HLC-8220GPC (manufactured by Tosoh Corporation),

[0172]Column: TSK guard Column Super MZ-L, TSK gel HZ4000, TSK gel HZ3000, TSK gel HZ2500, TSK gel HZ2000 (connected in this order for use),

[0173]Column oven temperature: 40° C., solvent: tetrahydrofuran, flow rate: 0.35 mL / min,

[0174]Standard sample: polystyrene.

[0175](Viscosi...

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Abstract

To provide a curable composition whereby it is possible to obtain a cured product having a high Abbe number and being excellent in transparency, crack resistance and releasability; and such a cured product. A curable composition comprises, in specific ratios, surface-modified metal oxide particles (A) having (meth)acryloyl-group-containing surface-modifying groups on the surface of the metal oxide particles, a compound (B) having a fluorine atom and at least one (meth)acryloyl group, a compound (C) having a urethane bond or —OCH2CH(OH)CH2—, having at least two (meth)acryloyl groups and having a mass-average molecular weight of at least 1,000, a compound (D) having no unsaturated bond-containing ring structure and having at least one (meth)acryloyl group, and a polymerization initiator (E).

Description

TECHNICAL FIELD[0001]The present invention relates to a curable composition and a cured product formed by curing the curable composition.BACKGROUND ART[0002]A cured product formed by curing a curable composition has such merits that (i) by an imprinting method, an injection molding method or the like, it is possible to form a cured product of a variety of shapes from a curable composition in a short time, that (ii) it is less likely to break as compared to glass and that (iii) it is light in weight as compared to glass, and thus, it has attracted attention as a material for optical members in place of glass. Heretofore, a thermoplastic resin has also been used for similar reasons, but poor yield has been pointed out due to a spool or runner in its injection molding process.[0003]For an optical member, particularly for a lens, it may sometimes be desired to reduce the chromatic aberration. Therefore, the curable composition may sometimes be required to be one capable of obtaining a c...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): C08F20/14C08F20/22C08F20/28C08F20/56C08F30/08C08F2/48C09C1/30
CPCC08F20/14C08F20/22C08F20/28C09C1/3063C08F30/08C08F2/48C08F20/56C08F220/22C08F292/00C09C1/3669C09C3/08C09C1/36C01P2004/64C08F222/10C08F222/1065C08F222/102C08F222/18
Inventor TAKAGI, KEISUKEYOSHIDA, JUNMUROFUSHI, HIDENOBU
Owner ASAHI GLASS CO LTD
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