Anyone knows about Huntsman Polyurethane Modeling paste?
and what’s the major difference between Polyurethane modeling paste and Epoxy modeling paste?
Im guessing these are the two compounds typically forming the common tooling blocks. Polyurethane is cheaper but has a higher CTE than epoxy. Epoxy therefore has a lower CTE but is dearer; so the choice generally depends on your curing temperature and dimensional requirements
And speed. PU is quicker, epoxy takes longer before it can be machined.
Right now we developed another system, which is based on an Acrylic resin, has a high Tg, low CTE, and can be machined after 1 hour curing or so.
Any ideas where I would look to by Huntsman Epoxy Modeling Paste Online?