Urethane foams from animal fats. VI. Improved properties of lard and tallow‐based foams

Abstract

Improved properties of fire retardant urethane foams prepared from hypobrominated lard and tallow have been obtained by purification of the polyols prior to their use. Hypobromination was carried out by epoxidation of the glycerides followed by treatment with gaseous HBr. The crude derivatives were extracted with acetone and separated from unreacted saturates at 5 C. One step hypochlorination of glycerides by use of acidified sodium hypochlorite has been carried out, and subsequent purification of the polyols led to minor foam property improvement. Fire retardant foams have also been prepared from soybean oil and monoolein using both of these general methods, although the acetone extraction step could be omitted.

Hydrolysis of Epoxidized Soybean Oil in the Presence of Phosphoric Acid

“…These soy-polyols have interesting properties and applications in a variety of fields. Preparation of polyols from vegetable oils has been extensively reported in the literature [10][11][12][13][14][15][16][17][18][19]. Guo et al [20] reported the preparation of soy-polyols by the hydrogenation of hydroformylated soybean oil and studied the physical and mechanical properties of polyurethanes based on these soypolyols.…”

Urethane foams from animal fats: VIII. Properties of foams from epoxidized tallow trimethylolpropane polyols

“…123 100 or 120, as required for castor oil (2). The present polyols, being higher in hydroxyl content than some previous fat-based polyols (3)(4)(5) required less of such adjuvants. The adjusted polyols were converted to low density rigid urethane foams by reaction in a one step method with a polymethylene polyphenylisocyanate, following a standard procedure.…”

“…The adjusted polyols were converted into urethane foams by a one-step process described previously (3)(4)(5). A typical formulation is shown in Table II.…”