Aus der Schmelze verarbeitbares Aminoharz auf Basis von 1,3,5-Triazinen und Aldehyden

Es werden veretherte 2,4-Diamino-1,3,5-Triazin-Aldehyd-Harze beschrieben, die im Gegensatz zu herkoemmlichen Harzen dieser Art Erweichungspunkte oberhalb von 100°C besitzen und in der Schmelze bei 100 bis 200°C, insbesondere bei 130 bis 150°C, verarbeitet werden koennen, ohne auszuhaerten. Die erfindungsgemaessen Harze koennen nach thermoplastischen Formgebungsverfahren sowohl zu Fasern oder Folien als auch zu Formteilen verarbeitet werden. Sie koennen ausserdem in Pulver- oder Granulatform verarbeitet werden, da sie bei Raumtemperatur nicht kleben. Die Aushaertung dieser Harze findet durch saure Zusaetze und/oder Temperaturen oberhalb 240°C statt.

WO 200240564 A UPAB: 20020910 NOVELTY - Etherified 2,4-diamino-1,3,5-triazine-aldehyde resins (I) are claimed, which are obtained by (a) reacting 2,4-diamino-6-substituted- 1,3,5-triazine(s) (II) with a 1-12 carbon (C) aldehyde and aldehyde group(s), (b) reacting the resultant unetherified 2,4-diamino-1,3,5- triazine-aldehyde resin with a 1-12 C alcohol and (c) precuring the precursor at 160-200 deg. C. DETAILED DESCRIPTION - Etherified 2,4-diamino-1,3,5-triazine-aldehyde resins (I) are claimed, which are obtained by (a) reacting 2,4-diamino-6-substituted-1,3,5-triazine(s) of formula (II) with a 1-12 carbon (C) aldehyde and aldehyde group(s), (b) reacting the resultant unetherified 2,4-diamino-1,3,5-triazine-aldehyde resin with a 1-12 C alcohol and (c) precuring the precursor at 160-200 deg. C: R = amino (NH2), hydroxyl (OH), 1-12 C alkyl or (un)substituted phenyl INDEPENDENT CLAIMS are also included for the following (1) the production of (I) by steps (a), (b) and (c); (2) a process for curing (I) to an insoluble and unfusible product in the presence of acid gas, liquid or solid and/or at temperatures above 240 deg. C. USE - Etherified 2,4-diamino-1,3,5-triazine-aldehyde resins (I) are used for producing fibrids, fibers, films, especially laminated films, and moldings; and for producing a fire-retardant, infusible coating by applying a laminated film or (I) powder to a substrate and fusion (all claimed). ADVANTAGE - Cured aminoplastics based on melamine have a high E modulus and low shrinkage on cure and are very stable mechanically but brittle. The precured etherified aminoplastics (I) are economical, mechanically stable and easy to process, as they are completely soluble in dimethyl sulfoxide and are also suitable for thermoplastic processing, e.g. by extrusion or thermopressing. The weight loss curing cure is relatively small. The elasticity of these resins can be modified by adding benzoguanamine or ammeline resins.