Ultraviolet absorbing copolymers
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United States of America Patent
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-
Jan 12, 1982
Grant Date -
N/A
app pub date -
Mar 3, 1980
filing date -
Mar 3, 1980
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
Photostable and weather stable absorping copolymers have been prepared from acrylic esters such as methyl methacrylate containing 0.1 to 5% of an 2-hydroxy-allyl benzophenone, preferably the 4,4' dimethoxy derivative thereof. The pendant benzophenone chromophores protect the acrylic backbone and when photoexcited do not degrade the ester side chain, nor abstract hydrogen from the backbone.
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