Stock material or miscellaneous articles – Surface property or characteristic of web – sheet or block
Patent
1990-10-09
1993-02-09
Robinson, Ellis P.
Stock material or miscellaneous articles
Surface property or characteristic of web, sheet or block
428500, 428543, B32B 2700, B32B 2716
Patent
active
051851911
ABSTRACT:
A surface modified, U.V. stabilized opaque polyvinyl chloride resin article and process for making same is described. The article includes a white pigment, such as titanium dioxide, in low amounts. The modified surface is substantially free of residual stabilizer and solvent, and its appearance and degree of surface perfection is substantially the same as an unmodified side of the article.
The process of the invention is characterized by the steps of immersing the polyvinyl chloride article is immersed in a suitable liquid media, then contacted with a solution of an ultraviolet light stabilizer in a suitable organic solvent, and residual stabilizer and solvent are displaced in situ, i.e. in a non-evaporative environment without contacting the air.
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Burchill Michael T.
Silbermann Joseph
Elf Atochem North America Inc.
Robinson Ellis P.
Turner Archene
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