Optical temperature indicator

Details Optical temperature indicator Optical temperature indicator

1997-01-15

1997-11-11

Thomas, Alexander

Stock material or miscellaneous articles

Liquid crystal optical display having layer of specified...

With charge transferring layer of specified composition

25229901, 374162, C09K 1902

Patent

active

056861532

ABSTRACT:
The invention relates to an optical temperature indicator. The indicator comprises an optically active layer of a transparent polymeric material in which liquid-crystalline material is dispersed. The molecules of the liquid-crystalline material form part of a polymeric structure via covalent bonds, for example as side-chain groups. The polymeric structure is preferably based on a siloxane. Such an indicator exhibits a good mechanical stability, while the opacity is preserved for a long period of time.

REFERENCES:
patent: 4070912 (1978-01-01), McNaughton
patent: 4246302 (1981-01-01), Benton et al.
patent: 4358391 (1982-11-01), Finkelmann et al.
patent: 4702558 (1987-10-01), Coles et al.
patent: 4868250 (1989-09-01), DeMartino et al.

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