Surfaces coated with fluorocarbon resins upon which insects cannot climb or alight and methods and means for their establishment
AssigneeBend Research, Inc.
InventorRoger H. Long
Life of this patent
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Abstract
A dispersion of a polytetrafluoroethylene resin having a particle size between about 0.05 and 0.5 microns, a suspending agent and a viscosity less than 15 centipoise. The dispersion has long shelf life, a reduced tendency to fibrillate and is comparatively stable when acted upon by shear forces and elevated temperatures. The dispersion is well adapted to be sprayed onto surfaces to form a dried film upon which insects can not climb, alight or affix nests or webs. The dispersion can be sprayed without fibrillation dispersion and the dried coatings are adherent, may be washed and remain effective over long periods of time.
Claims9
A method for restricting the movement of insects on a skewed surface comprising the steps of:
- forming a dispersion of finely divided particles of a fluorocarbon resin having an average size of less than 0.5 microns and a surfactant;
- applying the dispersion to the surface as a wet, continuous, thin coating of substantially uniform thickness;
- and
- evaporating the liquid from the coating to form a continuous film that is free from cracks and discontinuities and which film is adherent to the surface;
- the improvement comprising:
- adjusting the viscosity of the dispersion to less than 15 centipoise.
An article of manufacture having a surface coating which cannot be gripped by insects when the surface is exposed to water, the surface coating comprising a dispersion of finely divided particles of a fluorocarbon resin having an average size of less than 0.5 micron and a surfactant, the viscosity of said coating being less than 15 centipoise, and the surfactant having been leached out of said coating after application thereof.
Dependencies are inferred from the claim text.