Gregory S Davis

6623676, Sep 23, 2003

Jul 14, 1999

09/353449

Gregory B. Davis - Owings Mills MD
Walter Greenhouse - Towson MD
George Tolen - Ellicott City MD

Wm. T. Burnett Co. - Baltimore MD

B29C 4322

264112, 264123, 264321, 264916

A continuous process for reusing scrap polyurethane involves the following stages: Chips of thermoset polyurethane foam are supported as a bed; the bed of chips while moving is heated; the bed of chips while moving is subjected to pressure or compression; and a web is formed. The resulting material is useful in many industrial applications, including padding, gaskets, and insulation.

46832467, Jul 28, 1987

Mar 14, 1986

6/839714

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

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

C08J 936
C08L 7500

521 54

Polyurethane foam-fiber composite structures comprising a flexible polyurethane foam uniformly mixed with a fibrous material and bonded with a liquid flexible resinous binding agent to provide a cured foam structure; the relative amounts of materials in the foam structure being such that for each 100 parts by weight of polyurethane foam particles about 10 to 500 parts of fibrous material and about 10 to 250 parts of binding agent is employed, the fibrous material having a fiber length of from 1/8" to 4" and preferably 1/4" to 3/4", a density of at least 0. 75, and a diameter of less than 500 microns. The foam structures have an excellent sag factor with good resiliency for a select density.

48393932, Jun 13, 1989

Jul 8, 1988

7/216428

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

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

C08G 1814

521 53

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.

45914699, May 27, 1986

Jan 30, 1985

6/696523

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

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

B29C 6720

264 453

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.