Tenneco Chemicals, Inc.

Other

Bernard Rudner

Peter D Pauly

Thomas M Noone

Herman Stone

Eugene P DiBella

Kurt Fischman

David Reich

Edward Galica

Robert Offer

David Shepard

Flexible polyurethane foam having reduced tendency to form burning embers and which produces a char when it is ignited and burned is provided by incorporating into the reaction mixture before foaming an aldehyde or an aldehyde generator. In a preferred embodiment, flexible polyurethane foam of increased flame retardance is provided by also incorporating a flame retardant into the reaction mixture before foaming.

Intumescent flexible polyurethane foam having incorporated into the

A composite fiber or filament comprising a core or substrate coated with a cellular foam, and an outer circumference characterized by a substantially continuous, microcellular breathable and abrasion-resistant aspect.

Coated fibers and related process

A rigidized convoluted foam suitable as a self-standing filter is made by passing a sheet of air-permeable flexible polyurethane foam through a convoluting machine to obtain two unnested sheets of convoluted foam, each sheet being convoluted on only one side. The two sheets are nested and impregnated from the flat surface of each sheet almost to the closest valley surface with a thermosetting melamine, urea, or benzoguanamine resin in an amount to not appreciably impair the permeability of the foam and to increase the rigidity of the foam sufficiently so that each unnested sheet will be self-standing. After the resin has reacted, the nested sheets are separated.

Manufacture of rigidized convoluted foam from flexible polyurethane foam

Flexible polyurethane foam having reduced tendency to form burning embers when it is ignited and burned is provided by incorporating into the reaction mixture before foaming a derivative of melamine wherein one or more hydrogens have been replaced by hydroxymethyl and/or lower alkoxymethyl groups. In one embodiment, flexible polyurethane foams of increased flame retardance are also provided, by also incorporating a halogenated phosphorus ester into the reaction mixture before foaming.

Production of polyurethane foam of reduced tendency to form embers when

The amounts of tars, nicotine, phenols, carbon monoxide, hydrogen cyanide, and other toxic materials generated during the smoking of tobacco and its substitutes is reduced by incorporating in the smoking composition a small amount of a transition metal compound, e.g., chromium n-heptanoate.

Smoking compositions

A layer of open cell polyurethane foam adhered to a layer of a non-woven fibrous material of fine porosity relative to the foam results in an efficient fluid (e.g., air) filtering medium having a high capacity for retaining particulate contaminants. The combined layers are useful as an air filter element.

Composite fluid filtering medium and method of making

The invention provides a polyurethane foam of increased rigidity. The invention is provided by impregnating a flexible polyurethane foam with a thermosetting melamine, urea or benzoguanamine resin and a cross-linker, and then reacting the resin with the cross-linker.

Polyurethane foam of increased rigidity

Flexible, substantially nonlustrous, open-celled polyurethane foam made by an in situ process is rendered permanently flame-retardant by the incorporation of tribromoneopentyl alcohol into the reaction mixture.

Flame-retardant polyurethane foam compositions

Polyurethanes are made fire-retardant by including in the reaction mixture aromatic polyisocyanates having halogen-containing side chains.

Growing community of inventors

Ridgewood, NJ, United States of America

Bernard Rudner