Dow Global Technolgoies LLC

Allan James

Stephen R Burks

Helmut Stegt

James R Porter

Jason A Reese

Mark P Allen

David J Honkomp

George A Klumb

John W McLaren

Issam Lazraq

Daniele Paolini

Kenneth B Arnold

Stephen Burks

Stephen A Burks

A process for producing resilient, flexible polyurethane foams that function well in noise and vibration absorption applications for vehicle applications that are made from a blend of polyols (i) and an isocyanate (ii), wherein the blend of polyols (i) comprises a mixture of polyether polyols (i.a) that each has a hydroxyl equivalent weight of from 1200 to 3000 and at least 70% primary hydroxyl groups, from 5 to 80% by weight of the ethylene oxide-capped polypropylene oxides are nominally difunctional, from 0.5 to 20% by weight of the ethylene oxide-capped polypropylene oxides have a nominal functionality of four or higher, and the balance of the ethylene oxide-capped polypropylene oxides, but not less than 1.5% by weight thereof, are nominally trifunctional; an autocatalytic polyol (i.b) having a functionality in the range of 2 to 8 and a hydroxyl number in the range of 15 to 200, wherein said autocatalytic polyol compound comprising at least one tertiary amine group; and a low unsaturation polyol (i.c) having a functionality equal to or greater than 2, a hydroxyl equivalent weight of from 1800 to 2800, and a total unsaturation value of equal to or less than 0.06 meq/g.

Process for making low density high resiliency flexible polyurethane foam

Flexible polyurethane foams that function well in noise and vibration absorption applications are made from a mixture of polyether polyols oxides that each has a hydroxyl equivalent weight of from 1200 to 3000 and at least 70% primary hydroxyl groups. From 5 to 80% by weight of the ethylene oxide-capped polypropylene oxides are nominally difunctional, from 0.5 to 20% by weight of the ethylene oxide-capped polypropylene oxides have a nominal functionality of four or higher, and the balance of the ethylene oxide-capped polypropylene oxides, but not less than 1.5% by weight thereof, are nominally trifunctional.

Method for making low density polyurethane foam for sound and vibration absorption

The present invention is a method to make an environmentally friendly polyurethane molded article () comprising at least 20 percent renewable materials and molded articles made therefrom. Specifically, the method provides for molding a polyurethane coated sandwich structure () comprising a honey comb core () having fiber reinforcing layers () to provide an environmentally friendly polyurethane molded article with a desired shape such as an automobile load floor. The polyurethane coating is derived from a polyurethane&#x2014;forming mixture comprising an isocyanate component and a polyol component. Specifically, the polyol component comprises one or more natural oil based polyol, preferably comprising at least one of a hydroxymethylated fatty acid or a hydroxymethylated fatty acid (methyl) ester.

Environmentally friendly polyurethane composite panel

There is disclosed a closure panel. The panel finds particular utility as a liftgate or endgate for automotive vehicles. Typically, the assembly includes a first panel portion opposite a second panel portion and an intermediate material therebetween. Preferably, one or more of the panel portions is formed of a polymeric material and the intermediate material is preferably a structural foam that can bond to both the first and the second panel portions.

Composite panel and method of forming the same

A polyurethane composition useful for the manufacture of an elastomeric part is provided. The polyurethane composition comprises a polyisocyanate prepolymer and an active hydrogen containing compound, wherein from about 10 to about 60 percent by weight of the composition is a butylene oxide adduct and from about 70 to about 100 percent of the butylene oxide adduct is present in the polyisocyanate prepolymer. A method for preparing a polyurethane polymer from the polyurethane composition is also provided. Also, a method for preparing a polyurethane article from the polyurethane composition is provided.

High temperature resistant polyurethane polymers

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Oxford, MI, United States of America

Allan James