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US 6,642,341 B1Granted
Molded articles having improved flex modulus and impact strength and a process for the production thereof
AssigneeBayer Aktiengesellschaft
InventorsKieth G. Spitler, Allison E. Yeske
Life of this patent
Estimating the term…
Abstract
Molded polyurethane articles having improved flex modulus and impact strength are produced by subjecting a polyurethane-forming reaction mixture which has been introduced into a mold to a static electric field. The static electric field must have a field strength which is less than the dielectric strength of the polyurethane being produced but sufficiently strong to align the hard segment dipoles of the polyurethane.
Claims7
A process for the production of a molded polyurethane comprising
- a) introducing a polyurethane-forming reaction mixture into a mold, and
- b) applying a static electric field having an electric field strength less than that of the polyurethane produced from the reaction mixture but strong enough to align the dipole of the polyurethane being formed to the mold until the reaction mixture has been substantially completely reacted.
Dependencies are inferred from the claim text.