The mold is then filled with liquid urethanes
, treated under vacuum, heat, and pressure, and the urethane
part is removed from the silicone mold.
systems also need some form of catalyst (usually organometallics or amines) to speed up the reaction.
Traditional phenolic urethane
binders tend to soften with increasing temperature and by 392F (200C) have lost more than half of their strength at room temperature.
Custom formulates rigid, flexible, semi-rigid and elastomer urethane
systems and distributes full line of low- and high-pressure dispensing equipment for pour, spray, and RIM.
curatives include Curene 442 standard MBOCA-type material, Curene 185 for reduced hardness, and Curene 3005 liquid curative for polyester-based prepolymers.
Effect of Core Binders-Thin-section steel castings made with phenolic urethane
nobake binders exhibited slightly pockmarked surfaces.
identify and study the reactivity of the structure and morphology of both hard and soft segments in conductive urethanes
through DSC, DMA, and GPC, and through atomic force microscopy, transmission and scanning electronic microscopy, and small- and wide-angle X-ray spectroscopy.
However, recent developments with low free monomer prepolymers and the blocked curative provide a foundation for developing new urethane
product opportunities, according to the firm.
Pigments dispersed in six standard vehicles compatible with thermoplastics, unsaturated polyesters, epoxies, urethanes
, and other resins.
Foster says that its new low-friction urethanes
use a specially developed internal lubrication system that maintains physical properties of the base material while enhancing frictional performance.