The Dow Chemical Company

Wilfred W Wilson

David A Wilson

John L Burba, Iii

Herman W Schlameus

Donald J Mangold

Arthur E Read, Jr

William W Harlowe, Jr

Jimmy Myers

Sotiros C Polemenakos

John L Alexander

J Larry Potter

Formulations or products are caused to be active antimicrobials by the addition thereto of at least one effective amount of at least one crystalline mixed metal hydroxide (MMOH) conforming substantially to the formula

Antimicrobial positively charged particles

Amino piperazine esters, preferably of the formula: ##STR1## wherein x is 0 or 1 and each R is independently hydrogen or inert substitution, are produced by reacting an (optionally substituted) N-(2-aminoethyl) piperazine with an (optionally substituted) alkylene carbonate. The novel compounds are biocides that retard the growth of fungi and are also useful in preparing polymers.

Amino piperazine esters showing biocidal activity

A method of manufacture and the product made thereby are set forth; in the preferred and illustrated embodiment, a core including an insect poison is encapsulated by shell material melting and hardening for encapsulation. The core is primarily soybean extract mixed with DURSBAN.RTM. insecticide, an example of a toxicant. The surrounding shell or encapsulation is formed by melt extrusion of shell material. The surrounding shell encloses the core material to form an impervious shell. The surrounding shell includes soy protein as an insect attractant mixed in gelatin or poly(vinyl alcohol). A gelling agent such as carrageenan and the attractant were added to the shell. The beads formed by the melt extrusion encapsulation has sufficient shell strength to enable mechanical handling for dispensing, are resistant to water, do not bleed from the inside to the outside, and yet can be penetrated by the insect.

Microencapsulated ant bait

A method of manufacturing and the product formed thereby are set forth; the product relates to an encapsulated insecticidal bait which in the preferred and illustrated embodiment has a surrounding shell about a core. The core is formed of a volatile fumigant or ingested toxicant mixed with an insect species attractant food such as soybean oil. The core is enclosed in a shell formed by a two part polycondensate system forming the shell about the core. A first part and a liquid define an interfacial contact around a bead of the first part wherein beads of the core material form droplets in the water. The polycondensate system is defined by the two-part intermediates, where the second part is added to the liquid ratably to encapsulate the droplets.

Microencapsulated insecticidal bait formulations as fumigants

Compounds having improved properties of inhibiting the precipitation of metal ions when used in threshold amounts have been made which are derivatives of ammonia or di- or polyamines in which the amine hydrogens have been substituted with both methylenephosphonic acid groups or their salts and hydroxypropyl quaternaryammonium halide groups. Thus, ammonia can have two hydrogens replaced with methylenephosphonic groups while the third is replaced with a hydroxypropyltrimethylammonium chloride group; and three hydrogens of ethylenediamine can be replaced with methylenephosphonic groups, the fourth being replaced with a hydroxypropyltrimethylammonium chloride group.

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Lake Jackson, TX, United States of America

Wilfred W Wilson