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New light stabilizer for coextruded polycarbonate sheet
Author(s) -
Botkin James H.,
Schmitter Andre
Publication year - 2000
Publication title -
journal of vinyl and additive technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.295
H-Index - 35
eISSN - 1548-0585
pISSN - 1083-5601
DOI - 10.1002/vnl.10223
Subject(s) - polycarbonate , absorbance , materials science , viscosity , stabilizer (aeronautics) , layer (electronics) , composite material , optics , mechanical engineering , physics , engineering
Weatherable polycarbonate sheet can be produced by coextruding a cap layer containing a UV absorber over a minimally stabilized bulk layer. A new UV absorber based on hydroxyphenyltriazine chemistry has been developed that is especially suited to this application. The product provides superior long term weatherability because of its strong UV absorbance and its excellent photostability. It is also relatively nonvolatile and has only a minimal effect on melt viscosity.