7results about How to "Reduce heat release" patented technology

The present application relates to the technical field of high polymer material flame-retardant modification, and particularly relates to a COF hierarchical modification APP-based core-shell flame-retardant smoke suppressant, a preparation method and application thereof. The flame-retardant smoke suppressant takes APP as a flame-retardant core layer; takes PVP as a soft template agent, and assists in situ growth of melamine-p-phenylenedimethylene formaldehyde (COF) on the surface of APP to adsorb combustible volatile components in the initial pyrolysis stage, provide a gas source, and act as a Fe 3+ coordination skeleton; takes tannic acid as a coordination agent and a carbon source, and constructs a multi-level core-shell structure with Fe 3+ coordination. The present application realizes integration of flame-retardant and smoke suppression functions through hierarchical modification. When the flame-retardant agent is applied to polyurethane, it can significantly reduce the heat release rate, smoke release rate and toxic gas generation amount, and simultaneously improve the compatibility with the matrix, effectively overcoming the defects of poor compatibility and insufficient flame-retardant and smoke suppression performance of traditional APP flame-retardant agents. The present application has simple preparation process and controllable conditions, and is suitable for industrial production.

The invention relates to the technical field of polymethyl methacrylate, and discloses a flame-retardant polymethyl methacrylate material and a preparation method thereof.The flame-retardant polymethyl methacrylate material is obtained by reacting polymethyl methacrylate, a hydroxyl-terminated flame retardant and p-toluenesulfonic acid. The linear polymethyl methacrylate is crosslinked into a three-dimensional network structure, so that the crosslinking degree between molecular chains is enhanced, the molecular chains are not easy to slip under stress, good structural stability is maintained, and the polymethyl methacrylate has high tensile strength and bending strength. The flame retardant contains piperazine rings and phosphate structures, forms an intumescent flame-retardant system, generates phosphoric acid substances, nitrogen and other gases during combustion, promotes dehydration of a matrix to form an intumescent carbon layer, isolates oxygen, prevents heat conduction, inhibits the combustion process, remarkably reduces the peak value of the heat release rate and the total heat release amount, and has excellent flame-retardant performance.

The application discloses a kind of MOF / COF synergic modification cellulose biomass composite flame retardant and its preparation method and application, it is related to biomass-based flame retardant technical field.A kind of MOF / COF synergic modification cellulose biomass composite flame retardant preparation method, including the following steps: after pretreatment, cellulose biomass is modified with functional group, and functional group cellulose biomass carrier is obtained;With the functional group cellulose biomass carrier as substrate, by sequential growth method or one-pot method, MOF and COF are simultaneously loaded on it, and the MOF / COF synergic modification cellulose biomass composite flame retardant is obtained.The flame retardant proposed in the application gives full play to the efficient catalytic charring capacity of MOF, the excellent adsorption and stability characteristics of COF and the carbon source and carrier effect of cellulose biomass, and realizes the multiple flame retardant mechanism synergy of "physical barrier-catalytic charring-adsorption smoke suppression".

The application discloses a low-heat-release, low-smoke-density flame-retardant polyamide material and a preparation method and application thereof, and belongs to the technical field of high polymer materials. The material comprises nylon resin 52-61%, a flame retardant 18-26%, a flame-retardant synergist 6-10%, a plasticizer 8-15%, a coupling agent 0.5-1.0%, an antioxidant 0.3-1.0% and a lubricant 0.3-1.0%, and is prepared through mixing, melt mixing, extrusion and granulation. The application effectively reduces the heat release and the smoke density of the polyamide material during combustion through the synergistic effect of the components such as the flame retardant, and meanwhile, good mechanical properties and processing stability are maintained, thereby meeting the demand of high-safety-grade application scenarios.

The application discloses a kind of high-strength waterproof board and preparation method thereof, it is related to plate technical field.The preparation method of the application includes the following steps: sequentially stack 1 steel plate, 2 base plates, 1 fingerprint-resistant polymer film on 1 fingerprint-resistant polymer film, then heat pressing solidification, after cooling, plate is taken out, and high-strength waterproof board is obtained;Wherein, base plate is prepared from modified kraft paper and modified color paper.The water resistance, fire resistance and bonding strength of the plate are effectively improved by modifying kraft paper with modified phenolic resin, hydrophilic silicon dioxide and other components;The bonding strength, water resistance and fire resistance of the plate are further improved by modifying color paper with melamine, vanillin, flame retardant DOPO, 3,4-dihydroxybenzaldehyde and other components.Therefore, the application has a more extensive application prospect.

This invention relates to the field of fire-resistant aluminum composite panel technology and discloses a method for producing and processing fire-resistant aluminum composite panels, including the following steps: Step S1: Raw materials are fed into the hopper of a twin-screw extruder via a screw feeder and then into the twin-screw extruder. The twin-screw extruder melts and plasticizes the raw materials and extrudes them through a T-die. Step S2: The T-die sends the molten raw materials to a three-roll calender. The three-roll calender cools the molten raw materials and rolls and shapes them into a flame-retardant core board. Step S3: The two sides of the flame-retardant core board are bonded to the aluminum plate with a polymer adhesive film. After cooling and shaping, it becomes a fire-resistant aluminum composite panel blank and is placed in the cutting area for later use. Step S4: The fire-resistant aluminum composite panel blank is cut into the required dimensions according to production requirements. The aluminum plate scraps generated during cutting are separated from the flame-retardant core board. The aluminum plate is sold, and the flame-retardant core board is returned to the screw feeder for recycling. The production process is more environmentally friendly.

The present application relates to cable material modification technical field, specifically to a kind of low heat release flame-retardant polyolefin cable material and its double-screw modification method;Including polyolefin matrix resin 100 parts, phosphorus-containing triphenylene structure intumescent flame retardant 18 to 28 parts, transition metal chelate char-forming catalyst 0.5 to 3 parts, nano synergistic flame retardant 3 to 8 parts, compatibilizer 5 to 10 parts, antioxidant 0.3 to 1 part, lubricant 0.5 to 2 parts;By introducing transition metal chelate char-forming catalyst, catalyze polyolefin to form carbon quickly when burning, inhibit the peak value of heat release rate in the initial stage of fire, solve the problem of traditional system carbonation lag.