Patent Title: PHYSICAL PROPERTY IMPROVEMENT OF POLYURETHANES
Number/Link: WO2018/132648
Applicant/Assignee: BASF
Publication date: 19 July 2018
“Gist”: Solvent-free acrylate polyols are reacted together with polyether polyols and diisocyanates
Why it is interesting: In this invention a solvent-free (“100% solids” in the patent’s terminology) acrylic polyol is blended with a conventional polyether polyol and reacted with an aliphatic or aromatic diisocyanate. The acrylic polyol is prepared by co-polymerizing (e.g.) ethyl- or butyl (meth)acrylates, styrene and a hydroxyl functional acrylate like 2-hydroxyethyl acrylate or 4-hydroxybutyl acrylate, using BASF’s “solid grade oligomer” (SGO) polymerization process. The SGO process is a high temperature and high pressure continuous process allowing for the production of low-solvent acrylic resins. The polyurethanes are said to have increased physical properties, esp. tear- and tensile strength properties.
Hydroxybutylacrylate
Innovation in Polyurethanes 