Urethane foams from animal fats. IV. Rigid foams from epoxidized glycerides

Abstract

Liquid polyols have been prepared from epoxidized glyceryl trioleate, glyceryl monooleate, lard oil, neatsfoot oil, and soybean oil by hydration with 24% fluoboric acid. Upon adjustment of the equivalent weight to 100 with triisopropanolamine, the polyols were foamed by reaction with a prepolymer made from oxypropylated sorbitol and tolylene diisocyanate. The resulting rigid foams had densities between 1.66 and 2.34 lbs/ft 3 and compressive strengths ranging from 23 to 39 psi (10% compression).The same polyols were used in one-step systems with PAPI as the isoeyanate. In general, foam properties were comparable with those obtained from the prepolymer systems.

From Vegetable Oils to Polyurethanes: Synthetic Routes to Polyols and Main Industrial Products

“…Another method used a thiol as nucleophile instead of alcohol [53][54][55] (reaction B, Reactions with halogen reagents such as HCl or HBr were also reported [57][58][59][60] .…”

Effect of structure on properties of polyols and polyurethanes based on different vegetable oils

“…The transformation of the double bonds of triglycerides to hydroxyls and their application in urethane chemistry have been the subjects of many studies 1–9. Our group paid special attention to the functionalization of soybean oil and the structure–properties relationship in polyols and the resulting polyurethanes 10–16.…”

Structure and properties of polyurethanes based on halogenated and nonhalogenated soy-polyols

“…[1][2][3][4][5][6][7][8][9][10][11][12][13][14] However, polyols prepared from vegetable oils intrinsically have a very heterogeneous structure arising from the variation in structure of vegetable oils. The structure of soybean oil varies depending on the type of soybean, weather conditions, type of soil, and so forth.…”