The Dow Chemical Company

Other

Donald W Pennington

Joseph L Allison

Stephen A Noding

Gaylon L Dighton

Sanford A Siegel

Jane K McLemore

An oxidized halogenated polymer is prepared by a process comprising (a) forming an admixture of an acidic oxidizing agent and a suspension of a particulate halogenated polymer in a polar liquid; (b) heating the admixture to a temperature sufficient to initiate the reaction between the polymer and the oxidizing agent; and (c) continuing the reaction until an oxidized polymer having a preselected extent of oxidation is obtained. At least one addition polymerizable compound is, optionally, grafted to the oxidized halogenated polymer. The oxidized halogenated polymer and graft copolymers thereof have physical properties different from the halogenated polymer and graft copolymers thereof. Certain graft copolymers are non-caking or free flowing.

Oxidation of halogenated polymers and anticaking halogenated polymers

An oxidized halogenated polymer is prepared by a process comprising (a) forming an admixture of an acidic oxidizing agent and a suspension of a particulate halogenated polymer in a polar liquid; (b) heating the admixture to a temperature sufficient to initiate the reaction between the polymer and the oxidizing agent; and (c) continuing the reaction until an oxidized polymer having a preselected extent of oxidation is obtained. At least one addition polymerizable compound is, optionally, grafted to the oxidized halogenated polymer. The oxidized halogenated polymer and graft copolymers thereof have physical properties different from the halogenated polymer and graft copolymers thereof.

Oxidation of halogenated polymers

A process for preparing reinforced thermoset articles of manufacture from a lofted composite sheet employed as a skeleton or preform which is impregnated with a thermoset resin composition and cured. A reinforced thermoset article of manufacture prepared from a lofted composite impregnated with a thermoset resin composition and cured is also provided.

Method for preparing reinforced thermoset articles

This invention relates to a static dissipative laminate film produced by: coating a surface of a first plasticized thermoplastic film with graphite or carbon; overlaying the coated surface of the first film with a second plasticized thermoplastic film; and pressing the first and second films together to form a laminate film.

Static dissipative thermoplastic laminate film

A mechanism which periodically releases a quantity of material stored in a container at predetermined intervals of time. The container is partially open and hollow, and is mounted pivotally on a first axle. The mechanism includes a counter-weight for the container. The counter-weight is sufficient to maintain the container in an upright position when empty but insufficient to maintain the container in the upright position when full. The mechanism further includes a catcher having first and second plates disposed perpendicularly or obiquely to one another. The first plate includes a closed notch near the center and an open notch at one edge of the first plate. The catcher is pivotally mounted on a second axle which passes through the closed notch. The mechanism further includes a stop member which extends from one side of the container. The stop member is disposed in the open notch of the catcher prior to release, and holds the container in an upright position until released. A rotating arm mounted on a third axle periodially contacts one face of the second plate, thereby releasing the catcher and causing the container to tip forward and discharge its contents.

Periodic release mechanism

A porous polymer article for use as a filter medium or battery separator is prepared by admixing a cellulosic compound and a thermoplastic polymer, both usually in powder form, forming the article under pressure and heat to melt and flow the thermoplastic polymer into a continuous phase and after cooling to set the polymer matrix, contacting the set admixture with a solvent, e.g. water, for the cellulosic compound which will not also dissolve the polymer matrix to produce a porous polymer which has a predetermined degree of porosity and is free from residual salt. The article so produced is also disclosed.

Growing community of inventors

Baton Rouge, LA, United States of America

Donald W Pennington