Premium
Rigid urethane foams from blown castor oils
Author(s) -
Lyon C. K.,
Garrett Vilma H.,
Goldblatt L. A.
Publication year - 1964
Publication title -
journal of the american oil chemists' society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.512
H-Index - 117
eISSN - 1558-9331
pISSN - 0003-021X
DOI - 10.1007/bf02661896
Subject(s) - castor oil , polyurethane , compressive strength , raw material , materials science , composite material , polyol , mooney viscosity , isocyanate , solvent , viscosity index , acid value , chemical engineering , chemistry , organic chemistry , polymer , base oil , engineering , copolymer , scanning electron microscope
Solvent‐blown rigid urethane foams prepared from a low‐cost polyol mixture composed of raw castor oil and triisopropanolamine have been described. Foams with higher compressive strengths can be obtained by substituting oxidized (blown) castor oil for the raw castor oil in formulations of this type. The properties of rigid foams prepared from several commercial blown castor oils are described. The properties of these foams are correlated with the degree of oxidation of the blown oils used, as indicated by their oxygen content, density, viscosity, and refractive index. Removal of acid from blown oils having high acid values has no significant effect on the compressive strength of foams prepared from these oils. When blown castor oil is used instead of raw castor oil, less isocyanate is required to produce a urethane foam of specified density and compressive strength.