E.i. Dupont De Nemours and Company

Dupont Safety & Construction, Inc.

Dupont Industrial Biosciences Usa, LLC

Sharlene Renee Williams

Mark Andrew Harmer

Reiyao H Zhu

Fredrik Nederberg

Joseph D Trentacosta

Vivek Kapur

Bhuma Rajagopalan

Michael W Cobb

Justin W Chan

Surbhi Mahajan

Andrew Tadros

Alexander Anthony Marchione

Peter A Brown

John Henry McMinn

Ann Y Liauw

Vincent Galante

Mark Gary Weinberg

Disclosed are foam compositions and processes to form closed-cell tannin-based foams. The foams comprises a continuous polymeric phase defining a plurality of cells, wherein the continuous polymeric phase comprises a tannin-based resin derived from a tannin and a monomer, wherein the monomer comprises furfural, glyoxal, acetaldehyde, 5-hydroxymethylfurfural, acrolein, levulinate esters, sugars, 2,5-furandicarboxylic acid, 2,5-furandicarboxylic aldehyde, urea, difurfural (DFF), furfuryl alcohol, glycerol, sorbitol, lignin, or mixtures thereof, and wherein the plurality of cells comprises a plurality of open-cells and a plurality of closed-cells with an open-cell content measured according to ASTM D6226-5, of less than 50%. The foam composition also comprises a discontinuous phase disposed in at least a portion of the plurality of closed-cells, the discontinuous phase comprising one or more blowing agents.

Closed-cell tannin-based foams without formaldehyde

Disclosed are foam compositions and processes to form closed-cell tannin-based foams. The foams comprises a continuous polymeric phase defining a plurality of cells, wherein the continuous polymeric phase comprises a tannin-based resin derived from a tannin, a first monomer, and a second monomer, wherein the first monomer comprises formaldehyde, paraformaldehyde, furfural, glyoxal, acetaldehyde, 5-hydroxymethylfurfural, acrolein, levulinate esters, sugars, 2,5-furandicarboxylic acid, 2,5-furandicarboxylic aldehyde, urea, difurfural (DFF), or mixtures thereof, and the second monomer comprises furfuryl alcohol, glycerol, sorbitol, lignin, or mixtures thereof, and wherein the plurality of cells comprises a plurality of open-cells and a plurality of closed-cells with an open-cell content measured according to ASTM D6226-5, of less than 50%. The foam composition also comprises a discontinuous phase disposed in at least a portion of the plurality of closed-cells, the discontinuous phase comprising one or more blowing agents.

Closed-cell tannin-based foams

Disclosed are foam compositions and processes to form mixed tannin-phenolic foams. The foams comprises a continuous polymeric phase defining a plurality of cells, wherein the continuous polymeric phase comprises a mixed-resin derived from a phenol, a tannin, and a first monomer, and wherein the plurality of cells comprises a plurality of open-cells and a plurality of closed-cells with an open-cell content measured according to ASTM D6226-5, of less than 50%. The foam composition also comprises a discontinuous phase disposed in at least a portion of the plurality of closed-cells, the discontinuous phase comprising one or more blowing agents.

Mixed tannin-phenolic foams

Described is the preparation of sulfonated polyoxadiazole polymers with a high degree of sulfonation and good flammability properties. The polymers are useful in articles such as fibers.

Preparation of sulfonated naphthalene polyoxadiazoles polymers

Described are sulfonated aromatic compounds and methods of making said compounds. The compounds are useful as monomers in a variety of polymers such as polyamides and polyesters, and can impart flame resistant properties.

Sulfonated aromatic compounds

The invention is directed to sulfonated aromatic polyesters and methods of making said polymers. These polymers are useful as fibers and other articles. The polymer has a property of increased flame retardancy.

Sulfonated aromatic polyesters

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Wilmington, DE, United States of America

Sharlene Renee Williams