E.i. Dupont De Nemours and Company

Other

Robert David Wysong

Lionel S Sandell

Chuen-Ing J Tseng

George Alan Schurr

George B Beestman

William L Geigle

Arturo A Tirol

Stephen Santos

Chia-Chung Chen

Herbert Moore

William A McCollum, Iii

Emil W Shen

The present invention provides a compound comprising a quaternary ammonium salt of a sulfonylurea having the formula

Quaternary ammonium salts of a sulfonylurea

Crop protection composition comprising a crop protection solid particle

Water-dispersible granular agricultural compositions made by heat

Water-dispersible or water-soluble pesticide grandules from

A granular particulate herbicidal composition having characteristics that permit it to be effectively applied to the ground aerially.

Herbicidal composition

This invention relates to a process for preparing a one-phase, solid, controlled release pesticidal composition, said process comprising simultaneously mixing and heating a mixture of a copolymer of a hydrophobic barrier monomer and an unsaturated monomer dicarboxylic acid, a pesticide and a cross-linking agent to a temperature of about 60.degree. to 150.degree. C. but below the decomposition temperature of the pesticide until a homogenous melt is produced, followed by cooling.

Slow release pesticide formulations

An improved tracer particle is described comprising an ion exchange core having a polymer coating thereon, the coated ion exchange core having a reaction site capable of reacting with a compound containing an oxirane group, said coated ion exchange core having been treated with a compound containing an oxirane group to react with said coated ion exchange core causing an increase in mass of the tracer particle. Preferably, the ion exchange core is labelled with a radionuclide. These particles have improved characteristics including improved stability against leaching and improved handling properties. Such particles are useful in circulatory determinations involving the injection of the particles as a suspension in a physiologically acceptable carrier or medium into the circulatory system of animals.

Tracer for circulation determinations

This invention relates to a one-phase, solid controlled release pesticidal composition consisting essentially of a pesticide in homogeneous combination with a cross-linked copolymer prepared from hydrophobic monomers, selected from styrene and .alpha.-methyl styrene, and carboxylic acid-containing monomers.

Films, 0.5-10 mils thick, which are rapidly and completely soluble in cold water, and which are suitable for use as packaging film in automatic packaging equipment, can be prepared by conventional melt extrusion processes when prepared from a novel composition consisting essentially of 5-20 parts by weight of a polyethylene glycol (having an average molecular weight in the range between 325 and 550) in 100 parts by weight of a partially hydrolyzed low molecular weight polyvinyl alcohol.

Process for preparing cold water-soluble films from PVA by melt extrusion

Melt-extrudable cold water soluble films

Melt extrudable cold water-soluble films

Compositions consisting essentially of a (i) resin mixture containing a low molecular weight polyvinyl alcohol and a medium molecular weight polyvinyl alcohol, and optionally, a copolymer of vinyl alcohol and an ethylenically unsaturated ester and (ii) as a plasticizer a polyethylene glycol, are used for preparing films by melt extrusion. The compositions, in the form of powder or granules, or preferably pellets, are melted, extruded through a slit or annulus, quenched by air and then drawn down and/or blown to form a thin film. Such drawing or blowing can impart orientation to the film. The films are suitable for use as packaging film in automatic packaging equipment. They can be used to package pulverulent materials, and the film package containing the pulverulent material can be charged directly to water in which the film will dissolve, thus eliminating the problem of user contact and exact measuring of the package contents, as well as disposal of containers in which the pulverulent materials would otherwise be packaged. Moreover, the films provide enhanced resistance to breakage of packages made therefrom when such packages are handled or shipped, even under cold or dry conditions.

Method of making water-soluble films from polyvinyl alcohol compositions

Films prepared by melt extrusion or aqueous casting from compositions consisting essentially of a (i) resin mixture containing a low molecular weight polyvinyl alcohol and a medium molecular weight polyvinyl alcohol, and optionally, a copolymer of vinyl alcohol and an ethylenically unsaturated ester and (ii) as a plasticizer a polyethylene glycol. The films are suitable for use as packaging film in automatic packaging equipment. They can be used to package pulverulent materials, and the film package containing the pulverulent material can be charged directly to water in which the film will dissolve, thus eliminating the problem of user contact and exact measuring of the package contents, as well as disposal of containers in which the pulverulent materials would otherwise be packaged. Moreover, the films provide enhanced resistance to breakage of packages made therefrom when such packages are handled or shipped, even under cold or dry conditions.

Water-soluble films from polyvinyl alcohol compositions

Compositions consisting essentially of a (i) resin mixture containing a low molecular weight polyvinyl alcohol and a medium molecular weight polyvinyl alcohol, and optionally, a copolymer of vinyl alcohol and an ethylenically unsaturated ester and (ii) as a plasticizer a polyethylene glycol, which compositions can be used for preparing films by melt extrusion or aqueous casting. These films are suitable for use as packaging film in automatic packaging equipment. They can be used to package pulverulent materials, and the film package containing the pulverulent material can be charged directly to water in which the film will dissolve, thus eliminating the problem of user contact and exact measuring of the package contents, as well as disposal of containers in which the pulverulent materials would otherwise be packaged. Moreover, these films provide enhanced resistance to breakage of packages made therefrom when such packages are handled or shipped, even under cold or dry conditions.

Growing community of inventors

Wilmington, DE, United States of America

Robert David Wysong