E.i. Dupont De Nemours and Company

Other

Design Technology and Innovation Limited

Design Technology and Irrigation

Olaf Norbert Kirchner

Mark Christopher Tonkin

Mark Andrew Young

Andri E Elia

Martyn Douglas Wakeman

Jean-Michel Philippoz

Shengmei Yuan

Kathy Lynn Fortmann

Charles William Cahill

Marion G Waggoner

David V Mesaros

Disclosed herein are composite structures having improved heat aging and interlayer adhesion properties, processes for making them, and end use articles. The composite structures comprise a second component overmolded onto a first component and wherein the surface of the first and optionally of second component comprise a copper based heat stabilizer thereby providing superior bond strength between components compared to polyhydric alcohol based heat stabilizers.

Composite structures having improved heat aging and interlayer bond strength

Disclosed are composite structures having improved heat aging, processes for making them, and end use articles. The composite structures comprise a polyamide matrix resin composition comprising copper based heat stabilizer; a fibrous material and a polyamide surface resin composition comprising surface heat stabilizer; wherein the surface heat stabilizer is different than the copper based heat stabilizer.

The present invention relates to the field of overmolded polyamide composites structures and processes for their preparation. The disclosed overmolded composite structures comprise a first component having a surface, which surface has at least a portion made of a surface polyamide resin composition, and having a fibrous material impregnated with a matrix resin composition, and comprise a second component comprising an overmolding resin composition. The second component is adhered to the first component over at least a portion of the surface of said first component. One of the overmolding resin composition and the surface polyamide resin composition is made of a polyamide composition comprising a blend of one or more semi-aromatic polyamides (A) and one or more fully aliphatic polyamides (B) and the other of the overmolding resin composition and the surface polyamide resin composition is made of one or more polyamides.

Overmolded polyamide composite structures and processes for their preparation

A liquid crystal polymer composition comprising specified amounts of unsized glass filler and a liquid crystalline polymer having a melting point of about 280&#xb0; C. or more has improved high temperature stability compared with similar compositions containing sized glass fillers. The compositions are particularly useful where the composition is exposed for long time periods to high temperatures, such as parts in electrical and electronic apparatus, and cookware.

Liquid crystalline polymer composition

The present invention relates to the use of a hydrophilic membrane to provide by the process of pervaporation through the membrane water suitable for agricultural irrigation, industrial use, hydrating or rehydrating of food or agricultural or pharmaceutical compositions. The present invention also relates to a water purification apparatus which includes the hydrophilic membrane, comprising one or more layers of hydrophilic polymers, to purify water which may contain suspended or dissolved impurities and solids, including but not limited to seawater, brackish water and other kinds of polluted water.

Water purification apparatus

A process for forming molded articles, partcularly for forming by blow molding, by providing and forming articles from compositions made from blends containing (A) two copolyether ester elastomers that include acid end-groups, (B) an ethylene copolymer that includes at least one unsaturated epoxide group and acrylate and/or (meth) acrylate groups, at least one of (C) or (D) wherein (C) is an ethylene copolymer having acrylate and/or methacrylate groups and at least one anhydride of an unsaturated carboxylic acid and (D) is a rubbery polymer that can be finely dispersed and (E) a calcium compound capable of reacting with the acid end-groups of (A), preferably calcium oxide or calcium hydroxide.

Process for forming molded articles, particular by blow molding, utilizing compositions that include calcium reactants in blends containing copolyether ester elastomers and ethylene(meth)acrylate/unsaturated epoxide copolymers

Compositions that are particularly well-suited for blow molding are made from blends containing (A) two copolyether ester elastomers that include acid end-groups, (B) an ethylene copolymer that includes at least one unsaturated epoxide group and acrylate and/or (meth)acrylate groups, at least one of (C) or (D) wherein (C) is an ethylene copolymer having acrylate and/or methacrylate groups and at least one anhydride of an unsaturated carboxylic acid and (D) is a rubbery polymer that can be finely dispersed and (E) a calcium compound capable of reacting with the acid end-groups of (A), preferably calcium oxide or calcium hydroxide.

Calcium reactants in blends containing copolyether ester elastomers and ethylene(meth)acrylate/unsaturated epoxide copolymers

A method of modifying the growth of plant roots is provided in which the roots are grown in proximity to a membrane from which water is released during the growth of the roots, wherein the membrane is a hydrophobic porous membrane or a hydrophilic non-porous membrane. The method may also be used to collect materials exuded from plant roots by growing the plant roots in a growing medium that is surrounded by a membrane such that moisture is released into the growing medium from the membrane whilst materials exuded from the plant roots are retained within the growing medium by the membrane, wherein the membrane is a hydrophobic porous membrane or a hydrophilic non-porous membrane.

Method of collecting materials exuded from plant roots

An irrigation device is provided, the device comprising a container for water consisting of a plurality of surfaces, each surface substantially being either a hydrophilic membrane or impervious to water in all forms, and wherein at least one of the surfaces is substantially a hydrophilic membrane and at least one of the surfaces is substantially impervious to water in all forms.

Irrigation device

A method of modifying the growth of plant roots is provided in which the roots are grown in proximity to a membrane from which water is released during the growth of the roots, wherein the membrane is a hydrophobic porous membrane or a hydrophilic non-porous membrane. The method may also be used to collect materials exuded from plant roots by growing the plant roots in a growing medium that is surrounded by a membrane so that moisture is released into the growing medium from the membrane while materials exuded from the plant roots are retained within the growing medium by the membrane, wherein the membrane is a hydrophobic porous membrane or a hydrophilic non-porous membrane.

Growing community of inventors

Genolier, Switzerland

Olaf Norbert Kirchner