公开(公告)号：DE2757220A1

公开(公告)日：1979-07-12

申请号：DE2757220

申请日：1977-12-22

Applicant: BASF AG

Inventor： PETERSEN HARRO DIPL CHEM DR ,  FISCHER KURT ,  KLUG HANS DIPL CHEM DR ,  TRIMBORN WERNER DIPL CHEM DR ,  SCHMIDT HORST DIPL CHEM DR

IPC: C08G12/00 ,  C08G12/02 ,  C08G12/10 ,  C08G12/12 ,  C08G12/14 ,  C08G12/40 ,  C09D161/20 ,  C09D161/24 ,  C09D3/50

Abstract: A process for the preparation of soft and hard resins, and their use in surface-coating binders are disclosed. According to the invention, soft and hard resins are prepared from a urea, formaldehyde and a CH-acidic aldehyde by reacting a urea of the general formula (I) or (II) (I) (II) where R1 and R2 are hydrogen or identical or different alkyl, A is alkylene and X is oxygen or sulfur, with formaldehyde and a CH-acidic aldehyde of the general formula (III) where R3 and R4 are identical or different alkyl, aryl or alkylaryl wherein the urea, formaldehyde and CH-acidic aldehyde are employed in a mole ratio of from 1:2:2 to 1:4:4, at from 60 DEG to 150 DEG C., in the presence of an acid and in the presence or absence of a solvent and/or diluent, and then treating the product with a base in an anhydrousmedium.