Photochromic pigment

Details Photochromic pigment Photochromic pigment

1996-08-08

1998-10-13

Morgan, Kriellion S.

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

Synthetic resins

Processes of preparing a desired or intentional composition...

544 99, 526260, C08K 534, C07D26534, C08F 2606

Patent

active

058212876

ABSTRACT:
The present invention is related to the synthesis of a novel photochromic compound. This compound is a reactive photochromic spirooxazine pigment. Its structure is shown as below: ##STR1## wherein R.sub.1 is either a hydrogen atom or an alkyl group containing 1 to 5 carbon atoms. R.sub.2 and R.sub.3 are any of the following group: an alkyl group having 1 to 10 carbon atoms, or an alkyoxy group having 1 to 10 carbon atoms, or halogen atoms, or hydrogen atoms. The range of n is from 1 to 4, which represents the number of repeated units. This synthesized compound possesses a high thermal resistant property up to 241.degree. C., and it may be added into low melting polyethylene terephthalate(PET) resins for direct melt spinning to prepare photochromic fiber. In addition, the reactive double bond of this compound can be copolymerized with other vinyl monomers, to prepare high molecular weight photochromic materials used for photochromic eye glasses and/or photochromic coating.

REFERENCES:
patent: 5246989 (1993-09-01), Iwamoto et al.

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