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US 9,316,765 B2Granted
Photochromic composition
AssigneeTokuyama Corporation
InventorsKatsuhiro Mori, Toshimitsu Hiraren, Yasutomo Shimizu, Kazuhiro Teranishi
Life of this patent
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Abstract
A photochromic composition functions as an adhesive layer for bonding optical sheets or films made from a polycarbonate resin or the like, and can be used to produce a laminated sheet that exhibits excellent adhesive properties, heat resistance, photochromic properties, and perspiration resistance. The photochromic composition includes (A) a polyurethane-urea resin having a urea bond in a molecular chain, in which a tetrahydrofuran insoluble content is 20.0 to 90.0 wt %; and (B) a photochromic compound.
Claims10
A photochromic composition comprising:
- (A) a polyurethane-urea resin having a urea bond in a molecular chain, in which a tetrahydrofuran insoluble content is 20.0 to 90.0% by mass;
- and
- (B) a photochromic compound.
Dependencies are inferred from the claim text.