Dow Global Technolgoies LLC

George A Klumb

Parvinder Singh Walia

Luigi L Bertucelli

Mark P Allen

Amit K Chaudhary

Gianluca Casagrande

Jack E Hetzner

Allan James

Paolo Diena

John W McLaren

A process for producing a sealed stitched skin structure including the steps of: (a) providing a stitched skin member; (b) providing an aqueous thermoplastic polyolefin dispersion sealant coating composition; (c) applying the aqueous thermoplastic polyolefin dispersion sealant coating composition from step (a) to at least a portion of the surface of at least one side of the skin member to form a wet film or coating of the thermoplastic polyolefin dispersion sealant coating composition on the surface of the skin member; (d) drying the wet coating from step (c) on the skin member surface; and (e) heating the dried skin member from step (d) at a temperature sufficient to form a film or coating of the aqueous thermoplastic polyolefin dispersion sealant coating composition on the stitches of the seam in the skin member; wherein the film or coating seals the stitches in the skin member; a sealed stitched skin structure made by the process above; and a polyurethane foamed article.

Sealant composition

The present invention relates to method to make a spray skin from an aqueous polyolefin dispersion composition comprising a an olefin block copolymer, a dispersing agent, preferably an ethylene acrylic acid, and water, wherein said aqueous dispersion preferably has a pH less than 12 and is derived from the melt blending. The method comprises the steps of spraying the aqueous polyolefin dispersion onto a heated mold forming the skin and then allowing it to dry.

Method to make an elastomeric polyolefin skin

Fiber-reinforced polyurethane structures are made with a polyol composition that contains a particulate filler such as calcium carbonate, in addition to the fibers. The polyol composition and the polyisocyanate composition are selected such that the polymer formed in their reaction has a calculated molecular weight between crosslinks (M) of from 300 to 420. The polyisocyanate component contains a urethane-modified MDI and/or a urethane-modified polymeric MDI.

Process for making long fiber-reinforced polyurethanes that contain particulate fillers

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.

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Novi, MI, United States of America

George A Klumb