Wednesday, 28 June 2006 - 10:10 AM Federal Room B (Capital Hilton) 115
Bio-based polyurethane foams from soyoil polyols
Laetitia M. Bonnaillie1, A. Campanella2, Richard P. Wool1, and Raghavan Jayaraman3. (1) University of Delaware, Newark, DE, (2) Instituto de Desarrollo Tecnológico para la Industria Química, Santa Fe, Argentina, (3) University of Manitoba, Winnipeg, Canada
The focus of this work was to synthesize bio-based flexible polyurethane (PU) from plant oils. Different monomers from modified soybean oil were used for this purpose: soybean oil monoglyceride, hydroxylated soybean oil prepared from two different routes and soybean oil methanol polyol. They were mixed in different proportions with an industrial polyol (1:0 to 1:3), a di-isocyanate and with two catalysts: N,N-dimethylbenzylamine and tert-butylperoxy-2-ethylhexanoate. All the PU produced using N,N-dimethylbenzylamine formed foams within 7 to 9 minutes. If an industrial polyol was added, the foam cured at room temperature after a few minutes. Stress-strain curves and density of the PU foams were measured and compared with the same parameters of an industrial PU. The best PU based on soybean oil that could be used in the sporting shoes industry was obtained from soybean oil monoglyceride; its foam presents small, uniform closed-cells and its apparent density closely resembled that of the industrial PU. The other soybean oil polyols produced open-cell foams that can be used in various applications, such as automotive interiors and office furniture. The new PU foams are compared with our previous biocompatible foams made with 100% soyoil and a CO2 blowing agent.