Insect repellent
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United States of America Patent
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-
Mar 29, 1994
Grant Date -
N/A
app pub date -
Feb 5, 1993
filing date -
Aug 6, 1990
priority date (Note) -
Expired
status (Latency Note)
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Abstract
An insect-repellent composition is disclosed which includes an insect repellent such as p-menthane-3,8-diol and a synergistic amount of an acetal of formula (Z). A method of forming a preferred composition is also disclosed in which citronellal undergoes an acid-cyclization reaction to yield an impure mixture of p-menthane-3,8-diols and acetals. The impure mixture is subjected to fractional distillation to remove a low boiling point fraction and to thereby yield a remaining fraction which constitutes the preferred composition.
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