Wood-based material insulated for combustion resistance

US11135813B2 · kind B2 · utility

Assignee

• DDP Specialty Electronic Materials US, LLC. · US

Inventors

• Gregory T. Stewart · Midland, US
• Matthew J. Kalinowski · Freeland, US
• Kshitish A. Patankar · Midland, US
• Dakai Ren · Lake Jackson, US
• Steven P. Crain · Midland, US
• Ernest J. Herst · Midland, US
• Daniel W. Cheney · Boise, US
• Jeffrey K Olson · White City, US
• Tyler G. Congleton · Eugene, US

Key dates

• Filing date: Jul 31, 2017
• Grant date: Oct 5, 2021
• Expiry date: Oct 5, 2037

Classification

• Technology area (CPC E): Fixed Constructions
• CPC primary: E04C3/122
• WIPO field: Surface technology, coating
• WIPO sector: Chemistry

Abstract

A fire retardant article has a wood-based material with a polyisocyanurate foam article attached thereto, where the polyisocyanurate foam article covers 90% or more of the exposed portion of the wood-based material, has a thickness greater than 1.8 centimeters, a foam core having a density of 28-128 kg/m3, a trimer concentration characterized by at least one of (i) a trimer level in a range of 12-25 weight-percent and (ii) a molar ratio of trimer to sum of urethane and urea in a range of 1-8, a phosphorous concentration of at least 0.3 wt %, a combined concentration of phosphorous and bromine of at least 0.5 wt %, and a vapor permeable and non-combustible facer on at least one primary surface of the foam core.