Dow Global Technolgoies LLC

Rohm and Haas Company

Dow Silicones Corporation

Aou, Kaoru

Kaoru Aou

Rogelio Gamboa

Qinghao Meng

Christopher Thiede

William J Harris

Gary Robert Marchand

Colin Li Pi Shan

Ralph Craig Even

Antony Keith Van Dyk

Juan Carlos Medina

Dwight D Latham

Arjun Raghuraman

Sachit Goyal

Jeffrey C Munro

Raymond Lynn Laakso, Jr

Daniel Lawrence Dermody

Bernard E Obi

Rajesh P Paradkar

Hongming Ma

Lenin J Petroff

Marc S Black

Alan K Schrock

Felipe A Donate

William Hoy Heath

Marvin L Dettloff

William Aaron Koonce

Rajat Duggal

Paul A Cookson

Thomas H Kalantar

William Bryan Griffith, Jr

Harpreet Singh

Eddy I Garcia-Meitin

H Robert Goltz

Gary William Dombrowski

Yasmin N Srivastava

Laura J Dietsche

Gregoire Cardoen

Fabio Aguirre Vargas

John Klier

Joseph Jacobs

Amarnath Singh

Helge Braun

Nikhil Eapen Verghese

Adam L Grzesiak

Stephanie L Potisek

Carola Rosenthal

James W Young, Jr

Avery L Watkins

Adam C Colson

Van Delk

An Kaga

Kathleen Barnes

Armin Hassanzadeh

Meagan Broadway

Wenbo Xu

Hari Katepalli

Morgan A Springs

Douglas A Brune

Melissa M Rose

Theofanis Theofanous

Marcin Grigoriew

Asjad Shafi

Yibei Gu

Aiping Hu

David A Reuschle

Robert S York

Arne Anderson

Ann F Johnson

David K Mulkey

Randal E Autenrieth

Jillian Charon

Michelle Tipps-Thomas

Ragat Duggal

Doug Todd

Van M Delk, Jr

Asfar N Chowdhury

Randal Autenrieth

Scott Snyder

Yin Tang

Adebola O Ogunniyi

Rogelio R Gamboa

William Griffith

Douglas Brune

An N Kaga

Chrisopher P Thiede

Asfar Nurul Chowdhury

Recovery times of flexible polyurethane foams are increased by treatment with a pressure sensitive adhesive. An emulsion or dispersion of the adhesive in an aqueous carrier liquid is impregnated into the foam, with subsequent removal of the carrier. This invention is of special interest when the glass transition temperature of the starting foam is 16° C. or lower.

Viscoelastic foam with slow recovery time

The present disclosure provides for a coated flexible open-cell polyurethane foam structure. The coated flexible open-cell polyurethane foam structure includes a flexible open-cell polyurethane foam having a first major surface and a second major surface opposite the first major surface. The coated flexible open-cell polyurethane foam structure further includes a flexible heat conductive material covering 30 to 90 percent (cov., expressed in %) of a surface area of the first major surface of the flexible open-cell polyurethane foam in a predefined shape to provide one or more gaps exposing the flexible open-cell polyurethane foam between defined edges of the flexible heat conductive material, where each gap of the one or more gaps has a gap width according to Formula I: gap width (mm)&#x2264;&#x2212;0.196&#xd7;cov. (%)+20.6 (Formula I) where a total surface area of the one or more gaps provides 70 to 10 percent of the surface area of the first major surface of the flexible open-cell polyurethane foam.

Coated open-cell polyurethane foam structures with thermal absorption capabilities

Polyurethane-polyisocyanurate foams are prepared using a polyether polyol made from an alkylene oxide mixture that contains a specified proportion of ethylene oxide. The selection of proper polyol equivalent weight and ethylene oxide content leads to the production of foams having a useful combination of properties.

Polyurethane-polyisocyanurate foam

Recovery times and/or airflow of flexible polyurethane foam is increased by including certain tackifiers in the foam formulation. The tackifiers are formed into an emulsion that includes a polyether containing oxyethylene groups, a nonionic surfactant and certain fumed silica, carbon black or talc particles.

Flexible polyurethane foam having prolonged recovery time

Recovery time and/or airflow of flexible polyurethane foam is increased by including certain tackifiers in the foam formulation. The tackifiers are characterized in being incompatible with polyol or polyol mixture used to make the foam, having a viscosity of at least 10,000 centipoise at 25&#xb0; C., having a glass transition temperature of at most 15&#xb0; C. and being inert to other components of the foam formulation.

Viscoelastic foam

Recovery times and/or airflow of flexible polyurethane foam is increased by including certain tackifiers in the foam formulation. The tackifiers are characterized in being incompatible with polyol or polyol mixture used to make the foam, having a viscosity of at least 5,000 centipoise at 25 #C and having a glass transition temperature of at most 20 #C. The tackifier is pre-blended with certain monols to form a lower-viscosity blend that is combined with one or more other polyols and a polyisocyanate to form a reaction mixture for producing a polyurethane foam.

A coated article, such as a proppant, includes a base substrate and one or more polyurethane based coatings on an outer surface of the base substrate. The one or more polyurethane based coatings including the reaction product of an isocyanate component that has at least one isocyanate and an isocyanate-reactive component that has one or more simple polyols and one or more polyether monols at a ratio from 1:18 to 18:1. An isocyanate index is greater than 0.2 and less than 1.0.

Polyurethane based proppant coatings

A coated proppant includes a solid core proppant particle and a heavy metal recovery coating, including heavy metal recovery crystals embedded within a polymer resin matrix. A process for the manufacture of a coated proppant includes providing a solid core proppant particle, and forming on the solid core proppant particle, a heavy metal recovery coating including heavy metal recovery crystals embedded within a polymer resin matrix.

Proppant coating for heavy metal recovery

A coated proppant includes a solid core proppant particle, a first resin coating, and a second coating on the first resin coating. The second coating includes the reaction product of one or more curatives and one or more preformed aliphatic or cycloaliphatic based isocyanurate tri-isocyanates, derived from aliphatic diisocyanates, cycloaliphatic diisocyanates, or a combination of aliphatic and cycloaliphatic diisocyanates.

Proppant coating having preformed isocyanurate

A reaction system for forming a viscoelastic polyurethane foam includes an isocyanate component that has at least one isocyanate and an isocyanate-reactive component that is a mixture formed by adding at least a polyol component, an additive component, and a preformed aqueous polymer dispersion. The mixture includes, based on the total weight of the mixture, from 50.0 wt % to 99.8 wt % of a polyol component including at least one polyether polyol, from 0.1 wt % to 50.0 wt % of an additive component including at least one catalyst, and from 0.1 wt % to 6.0 wt % of a preformed aqueous polymer dispersion. The preformed aqueous polymer dispersion has a solids content from 10 wt % to 80 wt %, based on the total weight of the preformed aqueous polymer dispersion, and is one of an aqueous acid polymer dispersion or an aqueous acid modified polyolefin polymer dispersion in which the polyolefin is derived from at least one Cto Calpha-olefin.

Viscoelastic polyurethane foam with aqueous polymer dispersion

A reaction system for forming a polyurethane foam includes an isocyanate component that has at least one isocyanate and an isocyanate-reactive component that is a mixture formed by adding at least a polyol component, an additive component, and a preformed aqueous polymer dispersion. The mixture includes, based on the total weight of the mixture, from 50.0 wt % to 99.8 wt % of a polyol component including at least one polyether polyol, from 0.1 wt % to 50.0 wt % of an additive component including at least one catalyst, and from 0.1 wt % to 6.0 wt % of a preformed aqueous polymer dispersion. The preformed aqueous polymer dispersion has a solids content from 10 wt % to 80 wt %, based on the total weight of the preformed aqueous polymer dispersion, and is one of an aqueous acid polymer dispersion or an aqueous acid modified polyolefin polymer dispersion in which the polyolefin is derived from at least one Cto Calpha-olefin.

Polyurethane foam with aqueous polymer dispersion

A method for exposing a substrate to water under superatmospheric pressure at a temperature of at least 70&#xb0; C. includes (a) applying a reaction mixture to a substrate, which reaction mixture has an isocyanate index of at least 10 and includes an aromatic polyisocyanate component, a polyol component having a polyol with a hydroxyl equivalent weight of at least 500, and a catalyst component having an isocyanate trimerization catalyst, and at least partially curing the reaction mixture to form a polyisocyanurate or polyurethane-isocyanurate polymer having a glass transition temperature of at least 80&#xb0; C., and (b) exposing the substrate and the polyisocyanurate or polyurethane-isocyanurate polymer to water under superatmospheric pressure at a temperature of at least 70&#xb0; C.

Process for making urethane-isocyanurates

Solid compositions made from or coated with a non-melting organic polymer having a main glass transition temperature of at least 65&#xb0; C., few if any isocyanate groups and a wet aged glass transition temperature of up to 60&#xb0; C. are self-bonding materials that are useful in a variety of adhesive and molding operations. Under conditions of heat and moisture, these compositions will self-bond. The compositions can be used as adhesive coatings, which are solid and non-tacky and thus can be transported and stored easily under ambient conditions. These compositions are especially useful in applications in which, due to the location and/or orientation of the substrates, liquid or melting materials cannot be applied easily or will run off the substrates.

Solid, self-bondable organic polymers and methods for using same

Embodiments relate to coated proppants, a method of making the coated proppants, and a method to use coated proppants in fracturing subterranean formations around oil and gas wells to improve oil recovery. The proppants are coated with an oil well treatment agent, specifically, a wax inhibitor and/or a pour point depressant composition.

Proppant comprising an oil well treatment agent coating

The present disclosure is directed to a composition and articles containing the composition. The composition comprises a foam and a plurality of gel particles dispersed in the foam. The gel particles comprise an olefin block copolymer and an oil.

Foam composition with olefin block copolymer gel particles

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Lake Jackson, TX, United States of America

Kaoru Aou