11 results about "Piperazine phosphate" patented technology

The invention relates to the technical field of flame-retardant polypropylene composite materials, in particular to a flame-retardant reinforced polypropylene composite material containing flame-retardant modified glass fibers and a preparation method of the flame-retardant reinforced polypropylene composite material. The flame-retardant modified glass fiber-containing flame-retardant reinforced polypropylene composite material is prepared from the following raw materials: 30 to 60 parts of polypropylene, 5 to 60 parts of flame-retardant modified glass fiber, 5 to 20 parts of piperazine pyrophosphate, 5 to 20 parts of melamine polyphosphate, 0.5 to 5 parts of flame-retardant synergist, 1 to 6 parts of maleic anhydride ester-grafted polypropylene, 0.5 to 3 parts of coupling agent, 0.3 to 3 parts of lubricant and 0.2 to 0.5 part of antioxidant. The flame-retardant modified glass fibers are glass fibers subjected to surface modification by using a focused piperazine phosphate-melamine polyphosphate random copolymer. According to the technical scheme, the problem that the mechanical property and flame retardant property of glass fiber reinforced polypropylene in the prior art are difficult to optimize at the same time can be solved, and the glass fiber reinforced polypropylene has ideal popularization and application prospects.

The invention relates to the technical field of high polymer material pipes, and discloses a heat-resistant modified MPP pipe and a preparation method thereof.The heat-resistant modified MPP pipe is prepared from polypropylene resin, modified polypropylene resin, graphite powder, an antioxidant, a silane coupling agent, stearic acid, paraffin and heat-resistant filler; the preparation method of the modified polypropylene resin comprises the following steps: melting polypropylene resin to obtain melt liquid I; adding modified graphene into the melt I, and then increasing the temperature of the melt I to obtain melt II; adding focused piperazine phosphate and 1, 2-bis (diphenylphosphine) ethane into the molten liquid II, and uniformly stirring to obtain molten liquid III; a negative plate and a positive plate are inserted into the third molten liquid, and 0.1-0.5 A current is conducted for 40-60 min. The problems that when a high-power cable penetrates through an existing MPP pipe for use, due to the fact that the heat conduction performance of the MPP pipe is poor, heat in the MPP pipe is gathered and cannot be dissipated out of the MPP pipe in time, the performance and the service life of the cable are finally affected, and the service life of the MPP pipe is shortened are solved.

The invention relates to the technical field of flame-retardant polyamide materials, in particular to flame-retardant modified glass fibers, a preparation method thereof and application of the flame-retardant modified glass fibers to flame-retardant reinforced polyamide. The preparation method of the flame-retardant modified glass fiber sequentially comprises the following steps: dispersing glass fiber in an alcoholic solution, adding an amino coupling agent, and performing activation reaction to obtain aminated glass fiber; and dispersing the aminated glass fiber in an organic solvent, adding the focused piperazine phosphate-melamine polyphosphate random copolymer, and reacting to obtain the flame-retardant modified glass fiber. After the glass fiber is modified, the polymer / glass fiber composite material quickly forms an expanded, compact and hard carbon layer on the surface of the glass fiber at high temperature, so that the candlewick effect is inhibited, and the mechanical property of the composite material can be enhanced at the same time. According to the technical scheme, the technical problem that the mechanical property and the flame retardant property of the glass fiber modified polyamide composite material in the prior art are difficult to optimize at the same time can be solved, and the glass fiber modified polyamide composite material has ideal popularization and application prospects.

The present invention relates to the field of cellulose technology, and discloses a high-strength cellulose acetate blended fiber fabric and a dyeing process thereof. The present invention grafts alkenyl-containing tris (β-maleic acid ethyl piperazine) phosphate and acrylonitrile with cellulose acetate under the initiation of ammonium persulfate to obtain polymer-grafted cellulose acetate, which is then blended with polyacrylonitrile to obtain cellulose acetate blended fiber and its fabric. After cellulose acetate is grafted with acrylonitrile monomer, the interface compatibility between cellulose acetate and polyacrylonitrile is better, and the rigid skeleton of cellulose acetate after spinning can improve the breaking strength and mechanical properties of polyacrylonitrile. The polymer grafted with cellulose acetate contains an expansion flame-retardant structure of piperazine phosphate, which can promote the formation of an expansion carbon layer in the fiber during combustion, improve the limiting oxygen index of the fiber fabric, and has good flame retardant properties.

The invention relates to a glass fiber filled flame retardant polypropylene composition comprising (A) a polypropylene-based polymer, (B) a first flame retardant in an amount of 15 to 40 wt % of the total composition, wherein the first flame retardant is in the form of particles comprising ammonium polyphosphate and at least one phosphate selected from the group consisting of melamine phosphate, melamine polyphosphate, melamine pyrophosphate, piperazine phosphate, piperazine polyphosphate, piperazine pyrophosphate, 2-methylpiperazine monophosphate, tricresyl phosphate, alkyl phosphates, haloalkyl phosphates, tetraphenyl pyrophosphate, poly(2-hydroxy propylene spirocyclic pentaerythritol bisphosphate) and poly(2,2-dimethylpropylene spirocyclic pentaerythritol bishosphonate), (C) a second flame retardant in an amount of 0.1 to 15 wt % of the total composition, wherein the second flame retardant comprises an aromatic phosphate ester and (D) glass fibers in an amount of 5 to 40 wt % of the total composition.

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 low-density high-strength halogen-free flame-retardant burn-through-resistant long glass fiber reinforced polypropylene composite material, which comprises the following components by weight: 40-80 parts of polypropylene; 10 to 30 parts of continuous glass fiber; 2-6 parts of a compatilizer; 0.1 to 2 parts of an antioxidant; 3-8 parts of a triazine charring agent; 5 to 18 parts of ammonium polyphosphate; 10 to 35 parts of focused piperazine phosphate; and 3-15 parts of hollow glass beads. The obtained material can still keep certain mechanical strength during high-temperature combustion, and the stable high-temperature strength retention rate of a prepared workpiece can be ensured.

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.

The invention discloses an impact-resistant fireproof cable and a preparation method thereof, and belongs to the technical field of cables. The cable comprises a cable core and a protective sleeve, and the preparation method of the cable comprises the following steps: taking syndiotactic polypropylene, modified lignin, sulfur, di-tert-butylperoxy isopropyl benzene, modified epoxy resin, a 650 epoxy curing agent, talcum powder, an antioxidant 168, an ultraviolet light absorber UV-360, stearic acid and a piperazine phosphate flame retardant, adding into a high-speed mixer, mixing, cooling, and carrying out extrusion molding to obtain the cable. And transferring into a twin-screw extruder, extruding and coating the outer surface of the cable core, cooling and shaping to form the protective sleeve coating the outer surface of the cable core, thereby obtaining the cable with excellent impact resistance and fireproof performance.

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.