Process for the color recovery of vinyl plastics

Details Process for the color recovery of vinyl plastics Process for the color recovery of vinyl plastics

1996-12-03

1998-07-28

Warden, Jill

Cleaning and liquid contact with solids

Processes

Using sequentially applied treating agents

134 26, 427 64, 427140, 427151, 427158, 427322, 427379, B08B 300

Patent

active

057857660

ABSTRACT:
A process for the color recovery of vinyl plastics in which fluorescent optical whiteners are used to recover color from a vinyl plastic surface. A mild detergent and solvent is used to clean the surface and remove any accumulated films on the surface, after which the surface is dried. Coat(s) of a fluorescent solution is(are) then applied to the surface. The appearance of weathered and/or discolored vinyl plastics is restored with fluorescence in the blue to violet region of visible light without loss of reflectance when a UV absorbing fluorescent agent is used.

REFERENCES:
patent: 3660125 (1972-05-01), Buell
patent: 3791845 (1974-02-01), Tuite
patent: 3922232 (1975-11-01), Schein
patent: 4460374 (1984-07-01), Abel et al.
patent: 4741860 (1988-05-01), Hartman
patent: 4945121 (1990-07-01), Micale et al.
patent: 5064570 (1991-11-01), Rohringer
patent: 5094777 (1992-03-01), DiPietro
patent: 5401438 (1995-03-01), Otsuka
patent: 5646207 (1997-07-01), Schell

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