Лако-красочные материалы — производство

1. Self-Crosslinking Systems

Numerous possibilities exist for the manufacture of polymers with latent coreactive sites<10). The introduction of built in functional groups onto the surface of the polyurethane particle and proprietary reactive groups copolymerised into the backbone of the acrylic and buried deep into the core of the acrylic phase are the usual techniques for “crosslinkable copolymer” type systems. The crosslinking mechanism is not fully understood, but it is assumed to be made possible via interdiffusion of polymer chains across the former boundaries of adjacent particles. Evidence for the crosslinking can be found in increased solvent resistance, softening temperature and the appearance of a single Tg..