PHOTO-INITIATED, NON- AQUEOUS, TEMPERATURE INDEPENDENT GELS, AND METHOD OF PREPARATION THEREOF
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United States of America Patent
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Issued Date -
May 27, 2010
app pub date -
May 8, 2008
filing date -
May 9, 2007
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A liquid precursor for a gel comprises liquid polyethylene glycol (PEG), a gelling component such as a mixture of acrylic derivatives and optionally a polymerization initiator. A suitable polymerization initiator is the photoinitiator diphenyl-(2,4,6-trimethylbenzoyl)phosphine oxide. Gelation may be achieved by irradiation with UV. The resulting gel may be free from water and exhibits high viscosity over a wide range of operating conditions. The gel is suitable for use in an indication device suitable for indicating exposure to an accelerating force above a desired threshold. The indication device may be used to indicate whether an information carrier (such as a computer-readable optical disc) has previously been accessed.
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