Pennwalt Corporation

United States of America As Represented by the Secretary of the Air Force

Joseph Simkin

James P King

Peter F Radice

Gerd H Dahl

A sprayable insecticidal composition of low fish toxicity of a mixture in water of microcapsules comprised of a pyrethroid (synthetic pyrethrin) contained within an encapsulating wall of a cross-linked polymeric material, and methods of preparation and method of use of the composition on a wide variety of crops and aquatic sites infested with a broad spectrum of undesirable insects.

Microencapsulated pyrethroids

A process for microencapsulating naturally-occurring pyrethrins with a polyamide-polyurea shell by interfacial condensation which includes slowly adding an amine reactant to an aqueous emulsion containing the pyrethrin, an isocyanate, and an acyl halide with the requirement that at least one of said isocyanate or said acyl halide is polyfunctional, to provide free flowing capsules having a polyamide-polyurea wall encapsulating the natural pyrethrin.

Microencapsulated naturally occuring pyrethrins

A high temperature coating composition composed of a solvent mixture of zinc chloride, titanium dioxide, and an organo-substituted phosphinic acid.

High temperature coatings based on poly (zinc phosphinates)

Improved coatings having resistance to high temperature degradation are obtained by modifying a zirconium phosphinate polymer with phosphinic acid and a pigment. Acrylate or alkyd resins may also be included in the formulation.

High temperature pigmented coatings based on zirconium phosphinate

The process of freeze-drying vegetable, farm-crop, and flower seeds to increase storage life and germination rate of the seeds.

Growing community of inventors

Lafayette Hill, PA, United States of America

Joseph Simkin