Dip dyeing of plastic articles and the dye bath composition ther

Details Dip dyeing of plastic articles and the dye bath composition ther Dip dyeing of plastic articles and the dye bath composition ther

1979-12-12

1981-01-20

Clingman, A. Lionel

Bleaching and dyeing; fluid treatment and chemical modification

Nontextile, dyeing process or product, including inorganic...

8611, D06P 300, C09B 6700

Patent

active

042459915

ABSTRACT:
Dyeing of plastic articles, particularly sunglass lenses is conducted by use of a dye bath composition comprising a dye and a mixed solvent. At least about 70 weight % of the mixed solvent consists of glycerol and ethylene glycol whose relative ratio is in the range of from 95:5 to 20:80. The dyeing method and the dye bath composition are very advantageous for manufacturing sunglass lenses having high optical and aesthetic quality, particularly for dyeing hard-coated polarized lenses.

REFERENCES:
patent: 3532454 (1970-10-01), Fuhr et al.
patent: 3545998 (1970-12-01), Buzzell
patent: 3771949 (1973-11-01), Hermes
patent: 3901648 (1975-08-01), Arbaud
patent: 3989452 (1976-11-01), Hugelshoffer
patent: 4043637 (1977-08-01), Hovey
patent: 4047889 (1977-09-01), Hermes
patent: 4076496 (1978-02-01), Hamand
patent: 4115054 (1978-09-01), Hermes

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