modified melaminharze and their use for the production of post - forming - laminaten

摘要

The invention concerns modified melamine-formaldehyde resins made by condensing formaldehyde, melamine and a modifying agent, the resins containing amines of the formulae: (Ia) NR4R5-R1-X and/or (Ib) NR4R5-R2-Y-R3-X in which R1 and R3 may be the same or different and, depending on the nature of X, may be a straight-chain or branched-chain or cyclic C1-C12 alkyl or alkylene group, R2 is a straight-chain or branched-chain or cyclic C1-C12 alkylene group, R4 and R5 may be the same or different and are H or a straight-chain or branched-chain C1-C12 alkyl group, X may be hydrogen, OH or NR4R5 and Y may be -O- or -NH-, the molar ratio of formaldehyde to melamine being 1.2 to 2.5. The invention also concerns the use of such resins in the manufacture of post-forming laminates.