33results about How to "Give full play to the synergistic flame retardant effect" patented technology

The invention discloses a preparation method of a phosphorus-nitrogen-carbon-containing aggregate and intumescent flame retardant of a nano-sheet structure. The preparation method is characterized in that phytic acid, melamine and a solvent are prepared, the substance amount ratio of the phytic acid to the melamine is 1: 3 to 1: 15, and 20-50 ml of the solvent is added into every 0.01 mol of the melamine; the melamine is added into a reaction container provided with a thermometer and a stirrer, the solvent is added with stirring, the phytic acid is added at the temperature of 20-40 DEG C, and a reaction is conducted with stirring for 20-50 minutes, so that reaction liquid is obtained; and the reaction liquid is poured into a reaction still to react for 24-56 h at the temperature of 70-120 DEG C, cooling and suction filtration are conducted, solid is washed with ethyl alcohol and then washed with water till the pH is 7, and the solid is dried, so that the flame retardant is obtained. The preparation method is simple and environmentally friendly, and the synthesized phosphorus-nitrogen-carbon-containing aggregate and intumescent flame retardant of the nano-sheet structure has good compatibility with a polymer matrix and has good flame retardance.

The invention relates to a halogen-free flame retardant PC (poly carbonate) composition. The halogen-free flame retardant PC composition comprises the following components in percentage by weight: 68-87.5% of PC resin, 10-20% of styrene-acrylonitrile-N-phenyl maleic imide-cyclopentene copolymer, 1-5% of phosphorus based flame retardant, 1-5% of SMA (styrene maleic anhydride) random copolymer, 0.5-1.0% of antioxidant and 0-1.0% of lubricating agent. The halogen-free flame retardant PC composition provided by the invention fully achieves phosphorus-nitrogen synergistic flame retardant effect, flame retardant performance of a PC material is improved, addition amount of phosphate ester flame retardant is greatly reduced, the defect that heat resistance of the traditional phosphorus flame retardant PC resin is poor is overcome, and the obtained halogen-free flame retardant PC composition has excellent flame retardant property, high thermal deformation temperature, good comprehensive mechanical property and moderate cost.

The invention discloses a preparation method and application of a bio-based flame-retardant compatilizer for PBAT (poly (butylene adipate-co-terephthalate)). The bio-based flame-retardant compatilizer is prepared by the following process: carrying out grafting reaction on Fischer-Tropsch wax and maleic anhydride to obtain Fischer-Tropsch wax acid, dispersing the prepared Fischer-Tropsch wax acid and soybean protein isolate, and reacting with phytic acid in a solution to obtain the bio-based flame-retardant compatilizer. According to the bio-based flame-retardant compatilizer prepared by the invention, a novel flame retardant chemical structure with synergistic flame-retardant and compatible effects is obtained by using raw materials from bio-based sources, and the flame retardant does not influence the biodegradability of PBAT, can also play a lubricating role in the processing process, inhibits hydrolysis in the processing process, and has the advantages of favorable flame retardancy, favorable flame retardancy, favorable flame retardancy, favorable flame retardancy, favorable flame retardancy, favorable flame retardancy, favorable flame retardancy, favorable flame retardancy, favorable flame retardancy, favorable flame retardancy and favorable flame retardancy. And the method has very important practical significance for broadening the actual application scene of the PBAT.

The invention discloses a phosphor-silicon-containing aggregated flame retardant and a preparation method thereof. The preparation method comprises the following steps: adding 10-(2,5-dihydroxy phenyl)-9, 10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide and an acid-binding agent into a reactor loaded with a burette, a condensing tube and a nitrogen protection device, heating to 40 to 100 DEG C; weighing R1, R2-dichlorosilane, adding a solvent, and adding the mixture into the burette; adding the mixture at the temperature of 40 to 100 DEG C dropwise, and performing a thermal reaction for 2 to 10 hours after finishing of dropping; adding a precipitant, performing suction filtration, washing filter cakes with the precipitant, and drying to obtain the phosphor-silicon-containing aggregated flame retardant. The phosphor-silicon-containing aggregated flame retardant has high phosphor content and silicon content, abundant carbon sources, high char forming characteristic, superior flame retardance and thermal stability, and can be applied to high-molecular materials such as flame-retardant polypropylene, polystyrene and epoxy resin.

The invention provides a reinforced flame-retardant polypropylene composite. The composite is prepared from raw materials in parts by weight as follows: 100 parts of polypropylene, 3-5 parts of a halogen flame retardant, 0.01-0.5 parts of an antioxidant, 0.2-0.4 parts of an initiator and 15-20 parts of magnesium salt whiskers. The reinforced flame-retardant polypropylene composite has the tensilestrength larger than or equal to 32.4 MPa, the impact strength larger than or equal to 4.1 kJ.m<-2> and the flame-retardant performance of class V0 and has good mechanical performance and flame-retardant performance. Meanwhile, a preparation method of the reinforced flame-retardant polypropylene composite is simple, easy to control and suitable for industrial production.

The invention discloses a sepiolite nano flame-retardant fiber with the diameter of 10-60 nanometers, wherein the mass ratio of sepiolite nano fibers to bis-spironaphthoxazine group expanding type flame-retardant polymers is 1: 0.1-0.5; Si-O stretching vibration peaks between 900 cm<-1> and 1000 cm<-1> in an infrared spectrogram are obviously strengthened, and Si-O-Si stretching vibration peaks between 1000 cm<-1> and 1100 cm<-1> are obviously weakened. The invention also discloses a method for preparing the sepiolite nano flame-retardant fiber and a flame-retardant composite material using the same for strengthening and toughening. The invention improves the compatibility of the sepiolite nano flame-retardant fiber in a polymer base material by organically combining the sepiolite nano flame-retardant fiber with a polymeric type expansion flame-retardant agent together through grafting, thereby not only being beneficial to the uniform dispersion of the expanding type flame-retardant agent in the polymer base material, sufficiently playing the synergistic flame-retardant role between the expanding type flame-retardant agent and the polymer base material and enhancing the flame-retardant efficiency, but also playing a role of enhancing the strength and the toughness of polymer materials.