chemical applied for a patent for halogen-free flame-retardant polyester polyol. the patented technology can improve the flame-retardant performance.
news on december 13, 2023, according to the announcement of the state intellectual property office, chemical group co., ltd. applied for a patent titled “a halogen-free flame-retardant polyester polyol, preparation method and its “application in rigid polyurethane foam”, publication number cn117209734a, application date is september 2023. the patent abstract shows that the present invention relates…
