Flexible polyurethane foams which exhibit excellent flame resistance

Abstract

Abstract This invention is an active hydrogen-containing composition suitable for the production of flexible polyurethane foam when reacted with a polyisocyanate, said composition comprising, (a) a polyol having an average functionality of about 2.0 to about 4.0, having at least about 50% of its active hydroxyl groups in the form of primary hydroxyl groups, and an equivalent weight from about 500 to about 5000; (b) from about 0.5 to about 5 parts, per 100 parts by weight of component (a) of a crosslinker selected from the group consisting of monoethanolamine, diethanolamine, triethanolamine, monoisopropanolamine, diisopropanolamine, methylene bis(o-chloroaniline) and mixtures thereof; and (c) at least about 0.15 equivalent per equivalent of (a) and (b), of a polyfunctional flame retarding additive having an equivalent weight of less than about 300, which flame retarding additive is selected from the group consisting of (i) hydroxyl-terminated alkanes having a plurality of primary hydroxyl groups, (ii) alkylene ethers and polyethers having a plurality of primary hydroxyl groups, (iii) polyurea compounds having at least 2 hydroxyalkyl groups which are attached to a urea nitrogen atom, (iv) polycarbamates having a plurality of primary hydroxyl groups or a plurality of primary hydroxyalkyl groups attached to a tertiary nitrogen atoms. Foams prepared from this active hydrogen-containing composition have excellent burn properties, as determined by tests described herein, as well as good physical properties.

Inventors

• 👤 Jerram B. Nichols
• 👤 Hans R. Friedli
• 👤 Stephen R. Burks

Bibliographic Details