Surface modified polymer article and process for making same

Details Surface modified polymer article and process for making same Surface modified polymer article and process for making same

1987-07-23

1990-05-15

Buffalow, Edith

Stock material or miscellaneous articles

Composite

Of addition polymer from unsaturated monomers

428911, 428913, B32B 2730

Patent

active

049257390

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 a 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 a ultraviolet light stabilizer in a suitable organic solvent, and thereafter, residual stabilizer and solvent are displaced from the modified surface in situ. Both steps in the process are carried out in an environment which are non-evaporative of the solvent.

REFERENCES:
patent: 3043709 (1962-07-01), Ambroski
patent: 3297462 (1967-01-01), Fanning
patent: 3519462 (1970-07-01), Bristol et al.
patent: 3783011 (1974-01-01), Chauffoureaux
patent: 4349607 (1982-09-01), Ching
patent: 4770905 (1988-09-01), Silbermann et al.

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