Photocurable acrylic composition, and U.V. curing with development of U.V. absorber

Patent · Wed Jan 01 00:00:00 EST 1992

OSTI ID:868441

McKoy, Vincent B ^[1]; Gupta, Amitava ^[2]

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1. Flintridge, CA
2. Pasadena, CA

In-situ development of an ultraviolet absorber is provided by a compound such as a hydroxy-phenyl-triazole containing a group which protects the absorber during actinically activated polymerization by light at first frequency. After polymerization the protective group is removed by actinic reaction at a second frequency lower than the first frequency. The protective group is formed by replacing the hydrogen of the hydroxyl group with an acyl group containing 1 to 3 carbon atoms or an acryloxy group of the formula: ##STR1## where R.sup.1 is either an alkyl containing 1 to 6 carbon atoms or --CH.dbd.CH.sub.2.

• Research Organization: California Institute of Technology (CalTech), Pasadena, CA (United States)
• DOE Contract Number: AC03-83SF11944
• Assignee: California Institute of Technology (Pasadena, CA)
• Patent Number(s): US 5141990
• OSTI ID: 868441
• Country of Publication: United States
• Language: English

Related Subjects

photocurable
acrylic
composition
curing
absorber
in-situ
ultraviolet
provided
compound
hydroxy-phenyl-triazole
containing
protects
actinically
activated
polymerization
light
frequency
protective
removed
actinic
reaction
formed
replacing
hydrogen
hydroxyl
acyl
carbon
atoms
acryloxy
formula
str1
alkyl
-ch
dbd
carbon atoms
carbon atom
alkyl containing
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