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Patent Searching and Data


Title:
PHOTOCHROMIC POLYURETHANE LAMINATE
Document Type and Number:
WIPO Patent Application WO2005023529
Kind Code:
A3
Abstract:
A photochromic polyurethane laminate that is constructed to solve certain manufacturing difficulties involved in the production of plastic photochromic lenses is disclosed. The photochromic laminate includes at least two layers of a resinous material and a photochromic polyurethane layer that is interspersed between the two resinous layers and which contains photochromic compounds. The polyurethane layer is formed by curing a mixture of a solid thermoplastic polyurethane, at least one isocyanate prepolymer, at least one photochromic compound, and a stabilizing system.

Inventors:
QIN XUZHI (US)
SUGIMURA HIDEYO (US)
BOULINEAU MICHAEL S (US)
Application Number:
PCT/US2004/030023
Publication Date:
August 04, 2005
Filing Date:
September 09, 2004
Export Citation:
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Assignee:
VISION EASE LENS INC (US)
QIN XUZHI (US)
SUGIMURA HIDEYO (US)
BOULINEAU MICHAEL S (US)
International Classes:
B32B27/00; B32B27/18; B32B27/40; C08G18/10; C08G18/42; C08G18/75; C08L75/04; G02C7/02; B29D; (IPC1-7): G02C7/02
Foreign References:
US6367930B12002-04-09
Other References:
See also references of EP 1673655A4
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