Gregory D Davis

US Patent:

48393932, Jun 13, 1989

Filed:

Jul 8, 1988

Appl. No.:

7/216428

Inventors:

Michael S. Buchanan - Baltimore MD
Gregory B. Davis - Towson MD
Walter V. V. Greenhouse - Baltimore MD

Assignee:

Wm. T. Burnett & Co., Inc. - Baltimore MD

International Classification:

C08G 1814

US Classification:

521 53

Abstract:

Polyurethane foams based on reactive polyols and polyisocyanates containing a filler are modified with an organofunctional silane containing a hydrolyzable group and an ethylenically unsaturated linkage. The polyurethane foams have improved physical properties including improved stability, compression set, tear resistance, elongation, and tensile strength.

US Patent:

45914699, May 27, 1986

Filed:

Jan 30, 1985

Appl. No.:

6/696523

Inventors:

Michael S. Buchanan - Baltimore MD
Gregory B. Davis - Monkton MD

Assignee:

Wm. T. Burnett & Co., Inc. - Baltimore MD

International Classification:

B29C 6720

US Classification:

264 453

Abstract:

An improved method for manufacturing a foam-filled polyurethane foam bun from foam particles having uniformly dispersed therewith large amounts of solid material bonded together with new polyurethane foam is described. The method comprises uniformly applying a liquid flexible polyurethane foam-forming material to a dispersion of foam particles and solid material to provide a blend, distributing the blend within a mold, and foaming and curing the foam-forming material by a plurality of steaming steps wherein the mold is flipped from a first to second position between steaming steps. The foam buns have a uniform density gradient. Foam buns are disclosed having a variation in density across the foam bun. There is also disclosed an improved char-forming foam obtained as a result of using boric acid in the foam-forming formulation.