Dow Global Technolgoies LLC

Rohm and Haas Company

Qinghao Meng

William J Harris

Colin Li Pi Shan

Ralph Craig Even

Antony Keith Van Dyk

Kaoru Aou

Meagan Broadway

Van Delk

Felipe A Donate

Rajat Duggal

Daniel Lawrence Dermody

Morgan A Springs

William Aaron Koonce

Thomas H Kalantar

Paul A Cookson

William Bryan Griffith, Jr

Gary William Dombrowski

Yasmin N Srivastava

Gregoire Cardoen

Helge Braun

John Klier

Christopher Thiede

Adam L Grzesiak

Lucie Porcelli

An Kaga

Kathleen Barnes

David J Honkomp

Anja Arlt

Joseph Jacobs

Hari Katepalli

Yibei Gu

William L Ritter

Jillian Charon

Doug Todd

Van M Delk, Jr

Scott Snyder

Yin Tang

William Griffith

An N Kaga

Chrisopher P Thiede

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

Embodiments of the present disclosure are directed towards formulated polyol compositions that include a first polyether polyol having an average hydroxyl number from 112 to 280 mg KOH/g, a second polyether polyol having an average hydroxyl number from 18.5 to 51 mg KOH/g, a third polyether polyol having an average hydroxyl number from 20 to 70 mg KOH/g, and at least one of: fourth polyether polyol having an average hydroxyl number from 112 to 280 mg KOH/g; and a methoxypolyethylene glycol having an average hydroxyl number from 56 to 190 mg KOH/g.

Formulated polyol compositions

Flexible polyurethane foams having high airflows and excellent viscoelastic properties are made using a polyol mixture that includes a certain liquid polyester, certain ethylene oxide polyols and certain propylene oxide polyols, and a polymeric MDI. When used in applications such as bedding, the high airflows contribute to an improved sense of comfort by the user.

Viscoelastic polyurethane foams

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 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

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Angleton, TX, United States of America

Qinghao Meng