Zhejiang Longyou Sihai Chemical Industry Co., Ltd. is a leading hi-tech private stock enterprise in China engaged in the research, development, production and application of highly efficient and environment-friendly phosphor-grouping/boron-grouping non-halogen flame retardants, including non-halogen phosphor-grouping/boron-grouping additive-type flame retardants, non-halogen phosphor-grouping mixed flame retardants, non-halogen single-ingredient organic phosphine flame retardants, inorganic ...