Polyurethane elastomers of low hardness

Details Polyurethane elastomers of low hardness Polyurethane elastomers of low hardness

C - Chemistry, Metallurgy

08

G

402/135, 167/328

C08G 18/42 (2006.01) A61L 27/00 (2006.01) C08G 18/10 (2006.01) C08G 18/66 (2006.01)

Patent

CA 2025010

Mo3449 LeA 27,126 POLYURETHANE ELASTOMERS OF LOW HARDNESS ABSTRACT OF THE DISCLOSURE This invention relates to substantially linear thermoplastic polyurethanes prepared by a process comprising reacting organic polyisocyanates; at least one polyester derivative having at least two isocyanate reactive hydrogen atoms, wherein said polyester derivative is a polyester of an .alpha.,.omega.-dicarboxylic acid containing a total of at least 16 carbon atoms and a non-vicinal diol, in an amount such that the proportion of the .alpha.,.omega.-dicarboxylic acid is greater than 35% by weight based on the total quantity of thermoplastic polyurethane; and chain lengthening agents having no phenolic OH groups. This invention also relates to the process used to prepare such thermoplastic polyurethanes. This invention further relates to the use of the thermoplastic polyurethanes for medical purposes. Mo3449

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