Use of spiro-orthosilicates as blocked polyols/reactive diluents in high-solid PUR clear coats for car refinish applications

In Coatings, Adhesives, and Laminates

“…Both melamines and polyisocyanates can be employed as crosslinkers with orthoesters. The silicon analog, i.e., spiroorthosilicates, synthesized by reacting tetraethyl orthosilicate with 2 -butyl -2 -ethyl -1,3 -propanediol or 2 -ethyl -1,3 -hexanediol, has been employed as latent reactive diluents in fast curing, 2K polyurethane coatings with long pot lives [84] .…”