There are two main methods to synthesize POP: batch method and continuous method. In batch process, some basic polyether, vinyl monomer, initiator, chain transfer agent and other mixed materials are usually slowly added into a stirred reactor with dispersant and some basic polyether mixture. Polymer polyol is a kind of polyol containing organic filler, which can replace inorganic filler.
Extended data
Polymer polyol is a kind of polyether based on ordinary polyether polyol (ordinary flexible polyether triol and high-activity polyether), and vinyl monomers such as acrylonitrile, styrene, methyl methacrylate, vinyl acetate, vinyl chloride and initiator are added. Under the protection of nitrogen, free radical graft polymerization is carried out at about 65438 000℃.
POP belongs to organic filled polyether polyol, which is used to prepare soft and semi-rigid polyurethane foam products with high load or high modulus. Using this kind of organic filled polyether to partially or completely replace general polyether polyol can produce foamed plastics with low density and high load-bearing performance, which not only meets the hardness requirements, but also saves raw materials. The appearance is generally white or light milky yellow, also known as white polyether.
Reference source; Baidu encyclopedia-polymer polyol