Process for making a surface modified polymer article

Details Process for making a surface modified polymer article Process for making a surface modified polymer article

1989-05-01

1992-05-05

Beck, Shrive

Coating processes

Immersion or partial immersion

427160, 427336, 427352, 427353, 4274342, B05D 118

Patent

active

051106345

ABSTRACT:
A surface modified U.V. stabilized article is described which includes a resinous sheet whose sides are both exposed to the air. The surface regions of both sides of the sheet are substantially fully modified in situ with a stabilizing amount of an ingredient such as an ultraviolet light stabilizer material, while the exposed surfaces are substantially free of residual stabilizer and solvent material. The appearance and degree of surface perfection of the modified sides of the sheet are substantially the same as that of an untreated sheet. The U.V. stabilized resin article is made by a continuous process in which the resin body is immersed in a solution of an ultraviolet light stabilizer in a suitable organic solvent, and thereafter, residual stabilizer and solvent are displaced from the modified surfaces in situ. Both steps in the process are carried out in an environment which is non-evaporative of the solvent.

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