Wm. T. Burnett & Company

Walter V Greenhouse

Roland N Fracalossi

Michael S Buchanan

Gregory B Davis

George J Tolen

Joseph S Sollers

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.

Process for forming a continuous web from polyurethane foam pieces

Flexible polyurethane foams based on a blend of polyether and polyester polyols are described. The polyurethane foams of the invention have at least one of (a) enhanced pourability of a predominantly polyether foam; (b) flame laminability to a predominantly polyether foam without having as an essential ingredient an additive; (c) improved flame retardancy of a predominantly polyether or polyester foam; (d) improved hydrolytic stability to a predominantly polyester foam, or (e) increased softness to a predominantly polyether or polyester foam.

Polyurethane foam based on combination of polyester resin and polyether

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.

Polyurethane foams containing organofunctional silanes

An antistatic polyester polyurethane foam containing substantially uniformly incorporated therein as an antistatic material a combination of a particulate, electrically conductive material, such as carbon black, and a haloacetic acid, such as dichloroacetic acid. The combination of conductive material and haloacetic acid which is incorporated into the polyurethane foam during its in situ preparation is believed to be tied into the foam through reaction of the haloacetic acid and at least the diisocyanate used in the foam formulation. The polyurethane foams of this invention have excellent antistatic properties while retaining the desirable features of a good polyurethane foam including uniformity of cell size, no pinholing, and good structural stability.

Polyester polyurethane foams having antistatic properties

Polyurethane foam products comprising a foam filled with a foam and a large amount of combustion retardant materials are described. The foams are prepared by foaming a polyurethane foam-forming diisocyanate and polyol around pre-formed polyurethane foam chips having incorporated therein solid combustion retardant materials. The polyurethane foam-filled foams have excellent physical characteristics and, because of their combustion properties, are particularly suitable for furniture upholstery and cushioning applications including in mattresses.

Polyurethane foam-filled foam resistant to combustion and method of

Polyurethane foam products comprising a foam filled with a foam and a large amount of solid material inert to the foam products are described. The foams are prepared by foaming a polyurethane foam-forming diisocyanate and polyol around pre-formed polyurethane foam chips having incorporated therein or therewith solid materials inert to the foam. The inert material can be a fire- or combustion-retardant material; a material such as graphite or the like to render the foam conductive; or a filler material to impart various other characteristics. The polyurethane foam-filled foams can be tailored to have excellent physical characteristics and are particularly suitable for furniture upholstery, cushioning applications including in mattresses, and where special properties are required.

Polyurethane foam-filled foams and method of producing same

Rebonded polyurethane foams having incorporated into the foam urea and/or melamine are described. The rebonded foams have excellent resistance to smoldering combustion and flaming combustion. The rebonded foam is highly suitable, inter alia, for cushioning and seating structures.

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Baltimore, MD, United States of America

Walter V Greenhouse