Abstract Castor oil–polyurethane elastomers were prepared by reacting poly (1,4‐butane diol) (Terathane 1400) with aliphatic 1,6‐hexamethylene diisocyanate. The prepolymers were chain‐extended with bifunctional precursor chains and/or with castor oil as a trifunctional crosslinker at stoichiometric ...
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