Polyfunctional esterisocyanates. Useful monomers for the synthesis of ordered polymers

A number of mono- and difunctional esterisocyanates has been synthesised by the regioselective reaction of isocyanatocarboxylic acid chlorides with trimethylsilyl-protected alcohols and phenols. The diesterdiisocyanates were reacted with short chain diols to sequential poly(diesterdiurethane)s and with piperazine to poly(diesterdiurea)s. The monoesterisocyanates were anionically polymerized to 1-polyamides which show lyotropic liquid crystalline behaviour. The new products are characterized by spectroscopy, viscosimetry and thermal behaviour.