Introduction: The polymer polyol TPOP-2045 POLYOL 45% is a kind of generalpolyether polyol as the parent, through styrene and acrylonitrile monomer and initiator, under thespecific temperature and nitrogen protection ofgraft copolymerizeation. This product is BHT free, amine free, low residual monomer and lowviscosity. The product has excellent yellowing and reddening resistance with solid content of morethan 45%. Using environmental protectionantioxidant, the product has a large processing tolerance. The prepared foam material has goodfluidity and even and fine bubbles. It is especiallysuitable for the production of soft high bearing block and thermoplastics foam.