51results about How to "High char formation" patented technology

The invention relates to a flame retardant thermoplastic polyurethane elastomer (TPU) and a preparation method thereof. The flame retardant TPU comprises the following components in parts by mass: 70-90 parts of TPU, 9.7-29.875 parts of intumescent flame retardants and 0.025-3.75 parts of ionic liquids. The intumescent flame retardant TPU composite material is prepared by adopting the composite intumescent flame retardant. The vertical flame test level of the composite material is increased to V-0. A dense intumescent char layer is formed on the specimen surface of the composite material, so that the composite material has good flame retardant effects. Under the condition of small additive amount of the ionic liquids, the oxygen index of the ionic liquid and intumescent flame retardant synergistic flame retardant TPU composite material is increased, so that the vertical flame performance embodying molten drop resistance is obviously improved, the heat release rate and total heat release can be well reduced, the charring performance during flaming is improved and the composite material has certain effects on smoke suppression.

The invention relates to a preparation method of a graphene modified flame-retardant waterborne polyurethane coating and adhesive. The preparation method comprises the following steps: preparing a flame-retardant MOFs compound from MOFs, preparing a flame-retardant MOFs dispersion liquid from the flame-retardant MOFs compound, and finally preparing the polyurethane coating and adhesive from polymer polyol, isocyanate, dibutyltin dilaurate and the flame-retardant MOFs dispersion liquid. The effect of improving the two important indexes of flame retardance and static prevention of the polyurethane coating and the adhesive is outstanding.

The invention discloses a triazine polyurethane carbon-forming agent containing a furan ring side group and a synthesis method thereof. According to the invention, a diamine or diol compound containing a furan ring side group and a triazine ring is firstly prepared; the diamine or diol compound and diisocyanate are subjected to prepolymerization under the action of a catalyst; and a chain extenderis added for polymerization to form the polyurethane material. The polyurethane material has excellent carbon forming performance. The method for preparing the polyurethane carbon-forming agent has the advantages of less side effect, high yield and simple operation, the introduced bio-based furan compound can help improve degradability of the polyurethane, and the introduction of the furan ring and the triazine ring can significantly improve the carbon forming performance of the polyurethane. Thereby, the polyurethane carbon-forming agent with good thermal stability, excellent carbon formingperformance and high residual carbon content is obtained, and the polyurethane carbon-forming agent has a good development prospect in the polymer intumescent flame retardant system.

The invention relates to a halogen-free swelling flame-retardant system containing a benzoxazine charcoal forming agent and flame-retardant thermoplastic resin of the halogen-free swelling flame-retardant system. The halogen-free swelling flame-retardant system is prepared from the following raw materials in percentage by weight: 40%-95% of a phosphorus-nitrogen flame retardant, 2%-50% of the benzoxazine charcoal forming agent, 0-30% of a nitrogen-containing compound and 0-15% of a synergist, wherein the benzoxazine charcoal forming agent is one or more of single-oxazine-ring benzoxazine, bisphenol benzoxazine or diamine double-oxazine-ring benzoxazine. By virtue of the benzoxazine charcoal forming agent in the flame-retardant system, the dispersion of the added flame-retardant system in apolymer base material is promoted, the separation and migration of small-molecular flame-retardant components are inhibited, more stable charcoal layers can be generated in the combustion process, and the thermal insulation and the oxygen insulation are realized, so that the flame-retardant system has relatively high flame-retardant efficiency. Besides, a proper amount of silane structures are introduced into benzoxazine molecules, so that the flame-retardant system has the phosphorus-nitrogen-silicon ternary synergetic flame-retardant effect and can play a role of a silane coupling agent, and the comprehensive performance of a composite material is further improved.

The invention discloses an irradiation cross-linked thermoplastic polyester elastomer cable material. The irradiation cross-linked thermoplastic polyester elastomer cable material comprises, by weight, 100 parts of thermoplastic polyester elastomer (TPEE), 15-40 parts of ethylene-vinyl acetate copolymer (EVA), 50-80 parts of a fire retardant, 0.3-2 parts of a lubricant, 0.3-3 parts of an antioxidant and 0.1-1 part of an ultraviolet light stabilizer. The invention also discloses a method for producing cables through using the cable material. Cable products produced by using the cable material have excellent room temperature and high temperature mechanical performances; irradiation crosslinking realizes good flame retardation performance on the premise of meeting environmental protection, and also realizes cost reduction; and the cable material can reach 125DEG C temperature resistance level, has excellent scratch and wear resistance, and can be widely used in the fields of automobile wires and high and low temperature resistant cables.

The invention relates to an anti-pre-crosslinking rapid-solidification low-smoke zero-halogen flame-retardant silane crosslinking nano-modified polyolefin composition. The composition is prepared from, by weight, 100 parts of zero-halogen flame-retardant silane grafted nano-modified polyolefin matrixes A and 4-6 parts of catalyst master batches B. By the adoption of a fractional step method, a preparation method includes the steps that the zero-halogen flame-retardant silane grafted nano-modified polyolefin matrixes A and the catalyst master batches B are prepared and then mixed evenly, wherein the zero-halogen flame-retardant silane grafted nano-modified polyolefin matrixes A are formed by mixing nano-modified polyolefin, zero-halogen flame-retardant master batches, a silane grafted system and anti-pre-crosslinking agents, and the catalyst master batches B are formed by mixing carrier resin polyolefin and a rapid catalyst system. By the application of the method, the anti-pre-crosslinking low-smoke zero-halogen flame-retardant silane crosslinking nano-modified polyolefin composition capable of achieving rapid crosslinking under natural conditions can be prepared, the performance of the composition meets using requirements, and particularly, the composition can also be used for producing heat-resistant flame-retardant pipes when serving as a low-smoke zero-halogen flame-retardant silane crosslinking polyolefin cable material.

The invention discloses a halogen-free and flame-retardant glass fiber reinforced nylon composite and a preparation method thereof, and belongs to the field of production of halogen-free and flame-retardant reinforced nylon and polyphenylene sulfide composites. The halogen-free and flame-retardant glass fiber reinforced nylon composite is prepared from 25-50 parts of nylon, 5-15 parts of polyphenylene sulfide, 10-30 parts of glass fiber, 15-25 parts of a halogen-free and flame-retardant mixture, 1-5 parts of a compatilizer, 0.1-0.3 parts of an antioxidant and 0.1-0.5 parts of a lubricant by mixing and extruding. The halogen-free and flame-retardant mixture is prepared from flame-retardant red phosphorus masterbatch, melamine cyanurate and organic nano-montmorillonite in a mass ratio being5:1:1-5:3:3 by compounding. By compounding polyphenylene sulfide and nylon, hardness, wear resistance and creep resistance of the material are improved; meanwhile, flame retardance of the composite isimproved by the halogen-free and flame-retardant mixture, oxygen index reaches 28 or higher, and finally, the halogen-free and flame-retardant glass fiber reinforced nylon composite product with excellent combination property is obtained.

The invention discloses a wear-resistant flame-retardant conveying belt and a preparation process thereof. The wear-resistant flame-retardant conveying belt comprises a cover glue, an adhesive intermediate glue and a framework material, wherein the cover glue comprises an upper cover glue and a lower cover glue; the framework material is a steel wire rope or a flame-retardant polyester fabric; thecover glue comprises the following components: a matrix rubber, sulfur, flame retardant, 10-15 parts of stearic acid, an anti-aging agent, a vulcanization accelerator, a reinforcing filler, paraffinwax, metal oxides, a wear-resistant filler and a dispersing agent. A preparation process of the wear-resistant flame-retardant conveying belt comprises the steps of S1, preparation of the cover glue:(1) preliminary plastication and (2) mixed granulation; S2, preparation of the adhesive intermediate glue: I, preliminary plastication; II, stirring and mixing; III, grinding and defoaming; S3, impregnation and plasticizing of an aggregate material; and S4, extrusion and gluing of the cover glue. The wear-resistant flame-retardant conveying belt disclosed by the invention has the advantages of good wear resistance and excellent flame-retardant effect; in addition, the preparation method disclosed by the invention has the advantages of simple process, low production cost and high work efficiency.

The invention relates to the field of flame retardants for rigid polyurethane foams and in particular relates to intumescent polyols as well as a preparation method and application thereof. Compared with the prior art, the invention has the following beneficial effects: (1) the two types of novel intumescent polyols integrate an acid source, a carbon source and a gas source, are very good in thermal stability and higher in carbon forming property, have very high phosphorus and nitrogen contents, and can endow a matrix with good flame retardant property; (2) the two types of novel intumescent polyols contain polyhydroxyl active groups, and can react with a raw material namely isocyanate for preparing polyurethane foams to become a part of macromolecule chains of the polyurethane foams, so that the problem that a common flame retardant causes damages to the mechanical properties of a material due to poor compatibility with the matrix can be solved, and the matrix material can keep the flame retardant property for a long time; and (3) the intumescent polyols provided by the invention are simple in preparation process, mild in reaction condition and suitable for industrial production.

The present invention discloses a flame-retardant PTT, which comprises the following components in mass percentage: 80% to 95% of PTT, 2% to 8% of phosphorus-containing monomers, 1% to 5% of organic montmorillonite, 2% to 6% of aliphatic polyether, 0.1% to 0.5% of trimethyl phosphate, and 0.1% to 0.5% of antioxidant. The phosphorus-containing monomers are composed of 2-carboxyl ethyl alkyl phosphonic acid or 2-carboxyl ethyl phenyl phosphinic acid. The aliphatic polyether is composed of one component selected from polyethylene glycol, polytetrahydrofuran and polypropylene oxide, wherein the molecular weight of the aliphatic polyether is 1000-5000. According to the invention, the phosphorus-containing monomers are added for realizing the flame-retardant modification, and the organic montmorillonite is added for synergistically improving the char-forming characteristics and enhancing the droplet-proof performance. Therefore, the flame-retardant PTT is excellent in halogen-free, droplet-proof and flame-retardant performance, good in spinnability, excellent in mechanical property, simple in preparation process, low in cost and easy in popularization and application.

The invention discloses a composite hydroxide smoke suppression type flame retardant as well as a preparation method and application thereof. Calcium hydroxide is used as a synergistic flame retardantto be chemically bonded and coupled with magnesium hydroxide to form a stable chemical structure, the flame retardant can be used in polymer products, the smoke density of the flame-retardant polymeris obviously reduced, and the flame retardance and smoke suppression performance of the flame-retardant polymer are improved.

The invention discloses a preparation method of superacid flame-retardant PET resin master batch. The preparation method comprises the following steps: (1) adding talcum powder into water, mixing, stirring to obtain talcum powder suspension, continuously adding ammonia water and sodium polyacrylate to obtain modified talcum powder; (2) adding the modified talcum powder, samarium nitrate and iron nitrate into water to obtain metal ion modified talcum powder; (3) then slowly adding sulfuric acid into the metal ion modified talcum powder to obtain a superacid flame-retardant agent; and (4) mixingthe superacid flame-retardant agent, PET resin and a lubricating agent, adding into a high-speed mixer, uniformly mixing, extruding and granulating by adopting a double-screw extruder to obtain the superacid flame-retardant PET resin master batch. The preparation method of the superacid flame-retardant PET resin master batch provided by the invention is easy in obtaining raw materials and low incost; and the prepared superacid flame-retardant PET resin master batch is excellent in various mechanical performance and good in flame-retardant effect.

The invention relates to the technical field of macromolecular flame-retardant charring agents applied to polymer materials, and discloses an organic-inorganic hybrid efficient synergistic charring agent and a preparation method thereof, and the structural formula of the organic-inorganic hybrid efficient synergistic charring agent is shown in the specification. According to the charring agent, through nucleophilic substitution, two chlorine atoms on cyanuric chloride are sequentially substituted by p-xylylenediamine at different temperatures to form a linear macromolecular triazine intermediate taking p-xylylenediamine as a chain extender, then the temperature is increased, and the step of substituting chlorine on an upper side group of an intermediate is carried out by nano hydrotalcite and gamma aminopropyltriethoxysilane which are connected through hydroxyl according to the same principle as p-xylylenediamine and cyanuric chloride substitution modes. The charring agent has the characteristics of good charring property, high molecular weight, migration resistance, high temperature resistance and no influence on the mechanical properties of a matrix material, solves the problem that the charring property with good compactness and complete morphology cannot be formed due to the anti-migration property of a triazine derivative as the charring agent, and is applied to thermoplastic polyester elastomers.

The invention discloses an environmental-protection heatproof flame-retardation silicone rubber. The heatproof flame-retardation silicone rubber comprises the following components: methyl vinyl silicone rubber, carbon black, carboxyethyl phenyl hypophosphorous acid metal salt, melamine cyanurate, zinc borate, a silane coupling agent, zinc stearate, a plasticizer, sulfur powder, a promoter, and anantioxidant. The invention also provides a preparation method of the environmental-protection heatproof flame-retardation silicone rubber. The method comprises the following steps: adding methyl vinylsilicone rubber, carbon black, carboxyethyl phenyl hypophosphorous acid metal salt, melamine cyanurate, zinc borate, the silane coupling agent, the plasticizer, and the antioxidant in a mixing machine and uniformly mixing the raw materials, adding zinc stearate, sulphur and the promoter and uniformly mixing the materials to prepare a mother material, and adding the mother material in a vulcanizerfor sulfuration to prepare the environmental-protection heatproof flame-retardation silicone rubber. The silicon material of the heatproof flame-retardation silicone rubber has the advantages of highoxygen index, no halogen, safety, environmental protection, and wide application prospect.

The invention discloses an environment-friendly flame-retardant textile printing coating and a preparation method thereof. The coating comprises an adhesive, a cross-linking agent, a flame retardant and a catalyst; and the coating is prepared from the following components in parts by weight: 45 to 55 parts of the adhesive, 20 to 25 parts of the cross-linking agent, 15 to 20 parts of the flame retardant, 1 to 5 parts of reinforced fibers and 8 to 12 parts of the catalyst. The environment-friendly flame-retardant textile printing coating provided by the invention is simple in composition, environmentally friendly and good in flame retardant property, the oxygen index is remarkably improved, and after the coating is coated on the surface of a fabric, the fabric can have excellent self-extinguishing property, and is low in smoke amount and non-toxic in the combustion process.