Patent ID: 8728506

Claim:
A durable pest repellent in which a pest repellent chemical containing as an essential component at least one selected from N,N-diethyl-m-toluamide, 1-piperidinecarboxylic acid-2-(2-hydroxyethyl)-1-methylpropyl ester, and N,N-diethyl-m-toluamide and 1-piperidinecarboxylic acid-2-(2-hydroxyethyl)-1-methylpropyl ester is supported within layers of a layered silicate represented by Formula [2] or Formula [3] below: (M 1 ) a [Mg b ,(Na) c ](SiO 4 O 10 )F 2 [2] (M 1 ) a [Mg b ,(Li) c ](SiO 4 O 10 )(A) 2 [3] wherein (M 1 ) is Ca and/or Zn, (A) means F and/or OH, 2a+2b+c=6, 0.001<c≦0.55, and 0.2<a<3.