Dependence of physical properties on composition in a series of high load-bearing polyurethane foams

✍ Scribed by Morris A. Mendelsohn; Richard G. Black; Robert H. Runk; Herbert F. Minter

• Publisher: John Wiley and Sons
• Year: 1965
• Tongue: English
• Weight: 642 KB
• Volume: 9
• Category: Article
• ISSN: 0021-8995
• DOI: 10.1002/app.1965.070090808

✦ Synopsis

Data are presented on the physical characteristics of a polyether-based urethane foam developed as a highly specialized shock-cushioning material. The effect of changes in catalyst ratio and concentration on load deflection and density are shown-also the correlation between foam density and tensile strength. In general, load bearing and density increased nonlinearly with increasing tin catalyst concentration and decreased with increasing amine catalyst. Desired load-bearing properties were obtained by using a blend of di-and higher functional isocyanates and by the inclusion of ethylene glycol with a polyol of about 4000 average molecular weight. -Hydroquinone was used to inhibit autoxidation and scorching during normal exotherms of foaming. Open cells were obtained by the use of trimerized fatty acids.