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Humidity-sensitive element

  • US 4,642,601 A
  • Filed: 03/18/1982
  • Issued: 02/10/1987
  • Est. Priority Date: 07/21/1980
  • Status: Expired due to Fees
First Claim
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1. A humidity-sensitive element comprising an insulating substrate, a pair of electrodesformed thereon apart from each other by a definite distance, and a coating of humidity-sensitive organic material formed to cover said electrodes, said coating of humidity-sensitive organic material being a synthetic polymer having both a hydrophobic moiety and another moiety selected from the group consisting of an ionic moiety and a hydrophilic moiety, to give the material a property to change its electric resistance depending upon the moisture content in the atmosphere, characterized in that said coating is formed by applying a latex comprising the synthetic polymer to said electrodes, the particles forming said latex having the hydrophobic moiety forming a core of each latex particle and the another moiety forming a surface layer on the core of each latex particle, the material being an aggregate of said particles, with the particles adhering to each other to form a continuous film for the coating.

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