Ionic spiropyran and photochromic clay conjugate comprising the

Details Ionic spiropyran and photochromic clay conjugate comprising the Ionic spiropyran and photochromic clay conjugate comprising the

1996-03-19

1998-07-21

Bell, Mark L.

Compositions: coating or plastic

Materials or ingredients

Pigment, filler, or aggregate compositions, e.g., stone,...

106487, 252586, 252589, 430345, 548409, C08K 500

Patent

active

057829691

ABSTRACT:
Present invention provides ionic spiropyran compounds having a C10-C22 alkyl group or groups at the 1'- and/or 8-positions of composite material made by conjugating the said ionic spiropyrans with clay mineral, the said composite material being capable of forming a transparent thin film which is photo-interconvertible between the said spiropyrans and the corresponding merocyanines.

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patent: 5474715 (1995-12-01), Tagaya et al.
patent: 5581090 (1996-12-01), Goudjil
Chemical Abstract 114:111676 of J. Chem. Soc., Faraday Trans., 86 (21), 3616-21, Dec. 1990.
Japanese Patent Office Abstract, JP 02-264246, vol. 16, No. 20, Jan. 1991.
Macromolecules, vol. 20, No. 11, pp. 2958-2959 (1987) (American Chemical Society). (no month avail.).
Macromolecules, vol. 23, No. 1, pp. 31-35 (1990) (American Chemical Society). (no month avail.).

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