Process for treating dyed and undyed polyester materials with an

Details Process for treating dyed and undyed polyester materials with an Process for treating dyed and undyed polyester materials with an

1971-12-07

1976-03-09

Lee, Lester L.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

260 458N, 260 4595G, 260 4595H, 260 63R, 260 75T, C08G 6370

Patent

active

039431053

ABSTRACT:
A process for treating dyed and/or undyed polyester materials with an ultraviolet absorber to overcome or inhibit the destructive effects of ultraviolet light is disclosed. The polyester materials may be in the form of a film, yarn, textile products which are woven or non-woven. The process includes the steps of contacting or immersing the polyester material in either an undyed or dyed condition in a bath containing a non-volatile liquid polyhydric alcohol and an agent which is soluble in the polyhydric alcohol and compatible with the polyester material in effective concentrations such that effective amounts of the agent are incorporated into the polyester material together with the polyhydric alcohol to ensure substantially complete penetration of the agent in the polyester material and then removing excess bath solution by washing. The treated polyester material is then subjected to a heat treatment in which the absorbed polyhydric alcohol is removed by either vaporization or flashing from the polyester material whereby the absorbed treating agent remains in the polyester material to render the polyester material substantially stable to ultraviol light.

REFERENCES:
patent: 2920978 (1960-01-01), Randall
patent: 3211729 (1965-10-01), Siegrist et al.
patent: 3389004 (1968-06-01), Dressler

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