METHOD FOR PRODUCING METHYLENE-BIS-PHENYLCARBAMINE ACID ESTERS AND POLYMETHYLENE-POLYPHENYLCARBAMIC ACID ESTERS

摘要

1. A process for the preparation of methylene-bis-(phenylcarbamic acid esters) and polymethylene-poly-(phenylcarbamic acid esters) by reacting N-phenylcarbamates with formaldehyde or formaldehyde donors in the presence of a strong acid, characterized in that the reaction is carried out in a carboxylic acid.