The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 05, 1992
Filed:
Jun. 29, 1989
Michael T Burchill, Cranbury, NJ (US);
Joseph Silbermann, Old Bridge, NJ (US);
Atochem North America, Inc., Somerville, NJ (US);
Abstract
What is described herein is a surface modified U.V. stabilized article which includes a resinous sheet whose sides are both exposed to the air. The surface region of one side of the sheet is substantially fully modified in situ with a stabilizing amount of an ultraviolet light stabilizer material, while the exposed surfaces are substantially free of residual stabilizer and solvent material, and the appearance and degree of surface perfection of the modified side are substantially the same as that of the unmodified side of the sheet. The U.V. stabilized resin article is made by a continuous process comprising immersing a resin body in a suitable liquid media, contacting the surface of the immersed body through the liquid with a solution of a ultraviolet light stabilizer in a suitable organic solvent, and displacing residual stabilizer and solvent from the modified surface in situ.