4 results about "Piperazine phosphate" patented technology

The invention relates to the field of flame retardants, and provides a novel halogen-free flame retardant for PC (polycarbonate) plastics as well as a preparation method and application thereof, and the novel halogen-free flame retardant comprises the following raw materials in parts by weight: 65-80 parts of piperazine phosphate, 10-20 parts of an inorganic zinc compound and 0.3-1.5 parts of a polyether surfactant. The novel halogen-free flame retardant provided by the invention has excellent dispersity when being applied to PC plastic, so that the PC plastic has the characteristic of high flame retardance.

The invention discloses a diethylphosphinic acid-piperazine phosphate flame retardant as well as a preparation method and application thereof, and aims to solve the problems of low flame retardant efficiency and poor compatibility of the conventional phosphorus-nitrogen flame retardant. The preparation method of the diethylphosphinic acid-piperazine phosphate flame retardant comprises the following steps: 1, adding piperazine and sodium diethylhypophosphite into a reaction device, adding distilled water, stirring and heating; 2, placing hydrochloric acid in a constant-pressure dropping funnel, dropwise adding hydrochloric acid, and heating for reaction; 3, adding phosphoric acid, heating for reaction, and cooling for crystallization; and 4, carrying out suction filtration and washing on the reaction liquid, and drying to obtain the phosphorus-nitrogen flame retardant diethyl phosphinic acid-piperazine phosphate. The PDHP flame retardant disclosed by the invention has good compatibility with a TPS material matrix. The flame retardant contains P-O, P-C and piperazine groups at the same time, and shows an efficient flame retardant effect in TPS. The TPS flame retardant is applied to TPS flame retardant modification.

The invention discloses a halogen-free flame retardant TCPA and a preparation method and application thereof.The preparation method comprises the steps that phosphoric acid tri (2-chloropropyl) ester and piperazine monomers react in an alkaline environment to obtain the halogen-free flame retardant TCPA, and then orthophosphoric acid and the piperazine monomers are subjected to a polymerization reaction to prepare piperazine phosphate. The halogen-free flame retardant TCPA disclosed by the invention has relatively excellent flame retardant property and good thermal stability; and the flame-retardant polymer composite material can be prepared with a polymer, the mechanical property is improved, and the initial decomposition temperature and carbon residue of a matrix are improved, so that the thermal stability of the matrix is improved.

This invention discloses a vacuum drying apparatus for preparing piperazine phosphate, comprising a support arm A, a support arm B, a stirring tank, a reciprocating assembly, a drying assembly, and a stirring assembly. The reciprocating assembly includes an electric push rod and an output shaft, the electric push rod passing through the stirring tank via the output shaft, and the output shaft being movable inside the stirring tank. The drying assembly includes heating rods, both fixed to support arms A and B. The stirring assembly includes a rotating column and a stirring rod, the rotating column being fixedly connected to the stirring rod. This invention uses the reciprocating assembly to drive the drying and stirring assemblies to dynamically traverse the material area, enabling comprehensive material rotation, preventing material accumulation and clumping, and ensuring comprehensive drying of the material. This ensures that the surface and interior of the piperazine phosphate material are heated simultaneously, resulting in uniform drying and guaranteeing product quality.