312results about How to "Reduce heat release rate" patented technology

The invention relates to a sheet molding compound with high flame resistance, low smoke and non-toxic and a preparation method thereof. The formula of the sheet molding compound comprises the following substance in mass portion: 50-80 portions of unsaturated polyester resin, 15-60 portions of low shrink additive, 1-3 portions of evocating agent, 0.01-0.05 portions of polymerization inhibitor, 0.7-7 portions of wetting and dispersing agent, 3-8 potions of inner mold release agent, 1-2 potions of thickening agent, 20-50 potions of viscosity reduction filler, 100-200 portions of flame retardant A, 50-100 portions of flame retardant B and 50-250 portions of reinforced material; the flame retardant A is micron aluminum hydroxide and the grain diameter is 0.4-3.5 microns; the flame retardant B is nanometer aluminum hydroxide and the grain diameter is 30-80 nanometers. The sheet molding compound of the invention has the advantages of high flame resistance, low smoke and non-toxic, well mechanical performance and surface decorative effect.

A micro-foaming polystyrene wood-plastic composite material and the preparation method relates to a micro foaming wood-plastic composite material and the preparation method. The present invention solves the problems of poor impact resistance and easy combustion of the current wood-plastic composite material. The present invention is made of wood fiber material, coupling agent, plasticizer, lubricant, polystyrene, foamer, assistant foamer, fire retardants and smoke suppressant according to a weight portion. The preparation method is as follows: first, hot mixing; secondly, cooling and mixing; thirdly, extruding and molding. Then the micro-foaming polystyrene wood-plastic composite material can be made. The micro-foaming polystyrene wood-plastic composite material of the present invention has the advantages of small density, good fire-resistant and smoke-suppression effects, and impact resistance.

The invention relates to a nano-clay-containing irradiation crosslinked polyolefin cable material, which comprises the following raw materials in parts by weight: 55-75 parts of an ethylene-vinyl acetate copolymer, 25-45 parts of metallocene linear low-density polyethylene, 5-10 parts of a grafting material, 2-8 parts of a lubricant, 0.5-2 parts of an antioxidant, 120-160 parts of inorganic filler, 8-15 parts of a charing promoter, 5-15 parts of nano-clay, 0.5-3 parts of a crosslinking sensitizer, and 3 parts of carbon black masterbatch. According to the invention, in the polyolefin cable material, by adding the nano-clay as a flame retardant synergist of the inorganic filler and being fitted with the charing promoter, the nano-clay can increase the viscosity of a melt in the process of polymer burning, so that the barrier property of the melt can be enhanced, the escape of small molecules can be stopped, the heat release rate and the smoke density are greatly reduced, the fireproof performance is improved, and then cables can be subjected to A-class bundled burning, therefore, the cable material can be applied to the spaces with high requirements on oil-resistant and flame retardant properties.

The invention discloses a method of modifying hollow glass microbeads with an ionic liquid and a flame-retarding thermoplastic polyurethane elastomer with the modified hollow glass microbeads as a flame retardant. The method includes the steps of: 1) treating the hollow glass microbeads with a hydrochloric acid solution; 2) after the acid treatment, repeatedly washing and drying the hollow glass microbeads; 3) activating the hollow glass microbeads, adding a silane coupling agent, and performing mechanical stirring reflux; 4) stopping the reaction and cooling the reaction product to room temperature, and performing suction filtration with acetonitrile, ethanol and deionized water and drying the reaction product; 5) adding the ionic liquid to the silanized hollow glass microbeads and performing mechanical stirring reflux; 6) stopping the reaction and cooling the reaction product to room temperature, performing suction filtration successively with ethanol, a mixed solution of ethanol and deionized water, and ethanol, and drying the reaction product. By means of the hollow glass microbeads modified with the ionic liquid as the flame retardant for preparing flame-retarding thermoplastic polyurethane (TPU) elastomer, not only is oxygen index of the composite material improved, but also the vertical combustion performance, which reflects melt-dripping resistance, is improved, so that heat release rate is reduced and smoke is significantly inhibited.

The present invention provides one kind of silicious fire retardant for polyolefin with the molecular structure as shown. The fire retardant is white or yellowish powder and has smelting temperature of 220-260 deg.c. The present invention provides the preparation process of the silicious fire retardant and the application of the silicious fire retardant as halogen-free environment fire retarding additive for polyolefin material.

The invention discloses a melamine polymer type intumescent flame retardant which has the structure as shown in the specification, wherein R is a monohydric alcohol group of aliphatic series, and n ranges from 1 to 100. The invention also discloses a preparation method and application of such intumescent flame retardant. The novel intumescent flame retardant prepared by the preparation method is outstanding in flame retardant performance and smoke suppression, free of halogen, harmless, and high in water resistance and compatibility; the preparation method is simple and easy to carry out and control and convenient for industrial production.

A composite intumescent flame retardant for polypropylene is prepared by compositing the following components in parts by weight: 20-40 parts of dipentaerythritol phosphate modified by nano montmorillonite, 10-40 parts of ammonium polyphosphate, 20-50 parts of bisphenol A phosphoric acid melamine salt and 0-2 parts of flame retardant synergist. The composite intumescent flame retardant for the polypropylene, provided by the invention, has an excellent flame retardant property, and is halogen-free, low in smoke and toxicity, and non-corrosive in gases.

The invention discloses a preparation method of an inorganic hybrid smoke-suppression flame retardant, which comprises the following steps: a) preparing a 0.4-0.6 mg / ml graphene oxide suspension; b) adding a soluble zinc salt into the graphene oxide suspension until the concentration of the soluble zinc salt is 2.5-9 mmol / L, stirring for 15-20 minutes, and adding a soluble stannate with the same mole number as the soluble zinc salt; stirring for 30-40 minutes to obtain a precursor solution; c) carrying out hydrothermal reaction on the precursor solution at 120-160 DEG C for 6-12 hours; and after the reaction finishes, cooling, filtering, washing with water and drying to obtain the inorganic hybrid smoke-suppression flame retardant. The invention also discloses application of the flame retardant in epoxy resins. The method is simple to operate, has the advantage of mild and controllable reaction conditions, and can easily implement large-scale production. The prepared flame retardant has favorable flame retardancy, overcomes the defects of low flame-retardant efficiency, high aggregation tendency, high addition amount and the like in the single graphene flame retardant. The flame-retardant material prepared by adding into the epoxy resin has flame-retardant and smoke-suppression functions.