E.i. Dupont De Nemours and Company

Performance Materials Na, Inc.

David M Dean

Richard James Arhart

Charles J Molnar

Edmund Arthur Flexman

George Henry Hofmann

Charles J Brandenburg

Rutger D Puts

Richard Allen Hayes

Mehrdad Mehdizadeh

Donna Lynn Visioli

Stewart Carl Feinberg

David D Zhang

Elizabeth R Griffin

Steven G Dean

Randal D King

Steven F Fecanin

An energy storage and electricity generating system for alternately storing energy and producing electricity includes a framework, which is positionable proximate to a surface of a body of water and to which a motor and a turbine are attached. A cable is operationally engaged to the motor by a pair of guide pulleys. A pair of tanks is attached singly to opposed ends of the cable, positioning the motor to selectively raise one of the tanks while the other is being lowered. Actuated valves and release valves on the tanks allow pressurized air to be selectively generated within the tanks and pressurized water to be forced from the tanks, respectively, as the tanks are lowered and raised. The water is forced through a hose onto blades of the turbine to generate an electrical current.

Energy storage and electricity generating system and method of use

Provided is a method for preparing a latex composition, comprising providing an ethylene copolymer comprising copolymerized units of ethylene and copolymerized units of at least one polar comonomer; dissolving the ethylene copolymer with one or more latex monomers to prepare a solution; mixing the solution with water; optionally adding a surfactant or protectant colloid to form an aqueous emulsion; and polymerizing the latex monomer in the emulsion to form a latex composition comprising the ethylene copolymer and a latex polymer. Further provided are the emulsion polymerization product and the mini-emulsion polymerization product of at least one ethylene copolymer substantially dissolved in at least one latex monomer, such as an acrylic, styrene or vinyl monomer. Finally, formulated products comprising or produced from the emulsion or mini-emulsion polymerization product and articles comprising or produced from the formulated products are provided.

Method of incorporating ethylene copolymers into latex

The present invention is a composite composition comprising cellulosic material in a polymeric matrix comprising a thermoplastic polymer, and at least one compatibilizing copolymer prepared from an olefin and a functional comonomer, and articles prepared from such composites. The composition of the present invention can be useful as a synthetic wood.

Composite compositions comprising cellulose and polymeric components

A process is provided for preparing polymer composites from compositions comprising i) a polyolefin, ii) a polymer selected from the group consisting of polymers having hydroxyl groups and polymers having amino groups and iii) a polar ethylene copolymer having copolymerized units selected from the group consisting of C-Cunsaturated anhydrides, monoesters of C-Cunsaturated acids having at least two carboxylic acid groups, diesters of C-Cunsaturated acids having at least two carboxylic acid groups and mixtures thereof. The process is suitable for use with recycle streams that contain polymeric materials that are laminates or composites of dissimilar polymers.

Process for recycling polyolefin blend composition using an ethylene copolymer compatibilizing agent

The present invention is fluorine-containing ethylene copolymer composition and a process of preparing same. The ethylene copolymers of the present invention are melt processible fluorinated copolymers having surface energies of less than about 25 dynes/cm.

Ethylene copolymer with fluorine-containing graft and a process for preparing same

Disclosed are methods of using a transparent, luminescent polymer for transparent marking and/or labeling for identity verification purposes. Also disclosed are sheets, films, markers, labels and taggants comprising transparent, luminescent polymers. Also disclosed are articles labeled with a transparent, luminescent polymer. This invention particularly relates to use of transparent, luminescent polymer compositions comprising ethylene (meth)acrylic acid copolymers and rare earth ions and transparent, luminescent polymer compositions comprising methyl (meth)acrylate/(meth)acrylic acid copolymers, fatty acids and rare earth ions for these purposes.

Methods for identity verification using transparent luminescent polymers

Disclosed are a thermoplastic polymer-linked-asphalt composition and a process for making a thermoplastic polymer-linked-asphalt. More particularly, the present invention relates to the reaction and resultant linking of a combination of epoxide-containing polymers and anhydride-containing polymers to asphalt to form a polymer-linked-asphalt composition having higher softening points. The improved polymer-linked-asphalt product is particularly useful in roofing applications.

Polymer-linked asphalt compositions

Polymers containing &#x3b1;-methylenelact(ones)(ams) such as &#x3b1;-methylenebutyrolactones are useful in blends with other polymers. For examples such polymers which have reactive groups are toughened by mixing with a rubbery material which has complimentary reactive groups, or polymers containing repeat units derived from &#x3b1;-methylenelact(ones)(ams) are toughened by mixing with polymeric core-shell particles having an elastomeric core and a specified thermoplastic shell. The properties of thermoplastics are also improved by blending with &#x3b1;-methylenelact(ones)(ams) such as &#x3b1;-methylenebutyrolactones containing (co)polymers.

Blends of poly[&#x3b1;-methylenelact(one)(am)] homo-and copolymers

Disclosed are conductive polymeric materials comprising a resin-based structural material loaded with micron conductive fibers and/or micron conductive powders or to provide a conductive thermoplastic composition rather than an insulator. Also disclosed are antennas comprising the conductive thermoplastic compositions and methods for their fabrication.

Conductive thermoplastic compositions and antennas thereof

This invention provides a transparent, paramagnetic polymer composition in which a polymer is completed with sufficient rare earth ions, particularly ions selected from ions in the group of elements 64-69, to provide a polymer with a magnetic mass susceptibility greater than 20&#xd7;10emu/g measured at 298&#xb0; K. This invention provides optically responsive devices that employ these transparent, paramagnetic polymers as an element that is responsive to a magnetic field and a means for providing magnetic field. This invention provides transparent labels or markings employing these transparent, paramagnetic polymers.

Transparent paramagnetic polymer

The present invention relates a process for manufacturing polymer coated wire and cable and an electrically conductive wire having a metal core and an outer electrically-insulative, polymer coating capable of withstanding temperatures as high as 150&deg; C., wherein the polymer composition contains polyphenylene sulfide, a polymeric grafting agent and an ethylene copolymer. The polymeric grafting agent is a copolymer of at least about 50% by weight ethylene, about 0.5% to about 15% by weight of a reactive comonomer (e.g. unsaturated epoxide of 4-11 carbon atoms) and the ethylene copolymer comprises at least about 50% by weight ethylene and about 1% to about 35% by weight of an acid-containing unsaturated mono-carboxylic acid comonomer. The molar ratio of the reactive comonomer in the polymeric grafting agent to the unsaturated mono-carboxylic acid comonomer of the ethylene copolymer is to be maintained between 1.0 and 5.5 in order to achieve the desired polyphenylene sulfide wire coating properties.

Process for coating a wire or cable with polyphenylene sulfide alloy and resulting coated wire

This invention provides a transparent, paramagnetic polymer composition in which a polymer is complexed with sufficient rare earth ions, particularly ions selected from ions in the group of elements 64-69, to provide a polymer with a magnetic mass susceptibility greater than 20&times;10 emu/g measured at 298&deg; K. This invention provides optically responsive devices that employ these transparent, paramagnetic polymers as an element that is responsive to a magnetic field and a means for providing magnetic field. This invention provides transparent labels or markings employing these transparent, paramagnetic polymers.

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West Chester, PA, United States of America

David M Dean