Vinyl polymer grafted polyether polyols are commonly known as "polymer polyols", POP for short. The appearance is generally milky white to light milky yellow viscous liquid, stable polymer polyol is a kind of modified polyether polyol with special properties, it usually takes polyether polyol as the parent, adding acrylonitrile, styrene, methyl methacrylate, vinyl acetate and other vinyl monomers as well as initiators (such as azodiisobutyronitrile, dibenzoyl peroxide), It was obtained by free radical grafting polymerization under nitrogen protection. POP not only maintains the original toughness of polyether chain segment, but also has the good structural properties of vinyl polymer (such as rigidity), so that polyurethane foam has a high bearing capacity and good stiffness and elasticity, and increases the porosity of foam, which is used to produce soft and semi-rigid polyurethane foam with high bearing capacity and high resilience. Widely used in automobile, train, aircraft and furniture manufacturing, mattress, sofa and precision electronic components.

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