Dow Global Technolgoies LLC

Luis G Zalamea

Thomas Allgeuer

Adrian J Birch

Rudolf J Koopmans

Miguel A Prieto Goubert

Herbert Bongartz

Hans Kramer

Roberto Rigobello

Gerd Lohse

A method of reducing the number or size of voids in a polyurethane comprises reacting the formulation components in a container having an inner surface, or having a liner that has an inner surface, that has been modified to reduce the shear forces that normally accompany introduction of such components into a container. This is done by modifying the inner container's or container liner's surface by profiling and/or engraving it, or by including as a liner a mesh. The profiling and/or engraving or mesh serves to alter the formulation's flow dynamics such that the polyurethane has fewer and/or smaller voids, i.e., has a more uniform density, than polyurethanes formed without the modification.

Container modifications to minimize defects during reactive polyurethane flow

The instant invention provides reinforced microcapillary films and/or foams. The inventive reinforced film and/or foam have a first end and a second end, wherein the film and/or foam comprises: (a) a matrix comprising a first thermoplastic material, (b) at least one or more channels disposed in parallel in said matrix from the first end to the second end of the film or foam, wherein said one or more channels are at least 1 &#x3bc;m apart from each other, and wherein each said one or more channels have a diameter in the range of at least 1 &#x3bc;m; and (c) a second thermoplastic material disposed in said one or more channels, wherein said second thermoplastic material is different than the first thermoplastic material; wherein said film has a thickness in the range of from 2 &#x3bc;m to 2000 &#x3bc;m.

Reinforced microcapillary films and foams

The instant invention provides a rotomolding composition. The a rotomolding composition comprises at least 95 percent by weight of a thermoplastic polymer; and from 0.1 to 3 percent by weight of metal oxide lamellae; wherein the rotomolding composition is characterized by at least one of the following properties: (a) having a retention at elongation at break of at least 85 percent after 4000 hours of accelerated aging; or (b) having a ductility improvement of at least 50 percent relative to a similar composition free of said metal oxide lamellae.

Rotomolding composition

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Richterswill, Switzerland

Luis G Zalamea