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

Patent · Tue Dec 31 23:00:00 EST 1991

OSTI ID:868441

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

---

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
• 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

--ch
/522/524/526/
absorber
acrylic
acryloxy
actinic
actinically
activated
acyl
alkyl
alkyl containing
atoms
carbon
carbon atom
carbon atoms
composition
compound
containing
curing
dbd
formed
formula
frequency
hydrogen
hydroxy-phenyl-triazole
hydroxyl
in-situ
light
photocurable
polymerization
protective
protects
provided
reaction
removed
replacing
str1
ultraviolet