Spiro-pyranic compounds endowed with photochromic characteristic

Details Spiro-pyranic compounds endowed with photochromic characteristic Spiro-pyranic compounds endowed with photochromic characteristic

1996-05-15

1997-11-18

Zemel, Irina S.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Processes of preparing a desired or intentional composition...

524109, 524110, 544 70, 544230, 549331, C07D41308, C07D31196, C08K 515, C08K 53417

Patent

active

056888465

ABSTRACT:
Polymeric compositions comprising a polymer and photochromic compounds belonging to the class of spiro-pyrans, having the general formula (I): ##STR1##

REFERENCES:
patent: 3413234 (1968-11-01), Taylor et al.
patent: 3578602 (1971-05-01), Ono et al.
patent: 4931221 (1990-06-01), Heller
patent: 5066818 (1991-11-01), Gemert et al.
Grant, R. et al. Grant & Hackh's Chemical Dictionary (McGraw-Hill, New Yo, p. 115 (1987).
Rigaudy, J. et al., IUPAC Nomenclature of Organic Chemistry (Pergamon, Oxford), p. 265 (1979).

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