METHOD FOR PRODUCING URETHANE OPTICAL MEMBER

Title:

METHOD FOR PRODUCING URETHANE OPTICAL MEMBER

Document Type and Number:

WIPO Patent Application WO/2013/039114

Kind Code:

A1

Abstract:

The present invention is a method for producing a urethane optical member whereby a mixture comprising an aromatic polyisocyanate compound having a melting point of 25ºC or higher and a polythiol compound is cured, the method for producing a urethane optical member being such that after the aromatic polyisocyanate compound is heated and melted to a temperature that is the melting point thereof or higher, the product is mixed with a polythiol compound to obtain a mixed liquid, and the mixed liquid is cured without being heated by maintaining the liquid temperature of the mixed liquid at a temperature that is greater than the precipitation temperature of the aromatic polyisocyanate compound but is lower than the decomposition temperature of the cured product. The present invention provides a method for producing, with high productivity, a urethane optical member that does not fog and has excellent transparency by using an aromatic polyisocyanate that is a solid at 25ºC (normal temperature) and a polythiol compound.

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Inventors:

KOUSAKA MASAHISA (JP)
OKAMOTO YASUHISA (JP)

Application Number:

PCT/JP2012/073356

Publication Date:

March 21, 2013

Filing Date:

September 12, 2012

Export Citation:

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Assignee:

HOYA CORP (JP)
KOUSAKA MASAHISA (JP)
OKAMOTO YASUHISA (JP)

International Classes:

C08G18/08; G02B1/04; G02B3/00

Domestic Patent References:

WO2009098887A1	2009-08-13
WO2009098887A1	2009-08-13

Foreign References:

JP2005121679A	2005-05-12
JP2001330701A	2001-11-30
JPH02232603A	1990-09-14
JP2001330701A	2001-11-30

Other References: