The invention relates to a preparation method of aluminum hypophosphite The method comprises the following steps: firstly, preparing a water solution of sodium hypophosphite; secondly, preparing an ethanol solution of aluminum chloride; thirdly, preparing aluminum hypophosphite: firstly heating the water solution of sodium hypophosphite to be 80-90 DEG C, then slowly adding the ethanol solution of aluminum chloride into the water solution of sodium hypophosphite, enabling the molar ratio of sodium hypophosphite to aluminum chloride to be (4-12):1, then performing heating reflux reaction, and treating reaction liquid after the reaction, so as to obtain the aluminum hypophosphite The method has the advantages that ethyl alcohol serves as the solvent of aluminum chloride, the synthesis technology is simple, the requirement on reaction equipment is low, products obtained hardly contain hazardous substance sodium chloride residue, and the flame retardant property of the aluminum hypophosphite is good

Preparation method of aluminum hypophosphite

Provided are: a flame-retardant polyurethane resin which exhibits extremely high flame retardancy, while having both hydrolysis resistance and bleed-out resistance even under high temperature and high humidity conditions without inhibiting coloring of a product, and which is able to suppress increase in the cost; and a flame-retardant synthetic leather. A flame-retardant polyurethane resin which is obtained by mixing (a) a metal phosphinate salt and (b) a polyurethane resin, and which is characterized in that the mixing ratio (a)/(b) in terms of a weight ratio is within the range from 5/95 to 50/50; and a flame-retardant synthetic leather which is formed of the flame-retardant polyurethane resin.

Flame-retardant polyurethane resin and flame-retardant synthetic leather

The invention discloses a flame retardant thermal insulation polystyrene material. The raw materials include, by weight, 80-120 parts of styrene, 200-400 parts of water, 80-120 parts of a polyvinyl alcohol solution, 3-5 parts of tricalcium phosphate, 1-1.5 parts of triphenyl phosphate, 2.5-4.5 parts of ammonium polyphosphate, 2-5 parts of silica aerogel, 1-3 parts of di-tert-butyl peroxide, 2-4 parts of water soluble silicone oil, 10-18 parts of pentane, 80-100 parts of a compound flame retardant, 3-6 parts of benzenesulfonyl chloride, 4-6 parts of isopropyl titanate triisostearate, 20-30 parts of fumed silica, 2-3 parts of a rare earth stabilizer, 2-3 parts of a Ca/Zn composite stabilizer, and 3-5 parts of an antioxidant 264. The invention also discloses a preparation method of the flame retardant thermal insulation polystyrene material. The flame retardant thermal insulation polystyrene material provided by the invention has the advantages of simple operation, convenient industrial production, high flame retardance and good thermal insulation performance.

Flame retardant thermal insulation polystyrene material and preparation method thereof

The invention discloses a preparation method of hard high-flame-retardant smoke-suppression polyurethane foaming plastic. The preparation method comprises the steps that polyether polyol, ammonium polyphosphate, pentaerythritol, expanded graphite, a smoke suppression agent, a liquid halogen-free flame retardant agent, a foaming agent, an organic amine catalyst and a foam stabilizer are mixed to prepare a polyurethane composition A; isocyanate and a catalyst are prepared into a polyurethane composition B; the polyurethane composition B is added into the polyurethane composition A for rapid and even stirring; then the mixture is poured into a mold, foaming is performed at normal temperature, and the hard high-flame-retardant smoke-suppression polyurethane foaming plastic is obtained after foam curing. The halogen-free environment-friendly solid flame retardant ammonium polyphosphate, the pentaerythritol, the expanded graphite, the smoke suppression and the halogen-free flame retardant agent are adopted to replace a conventional halogen-containing flame retardant, a synergistic effect and a flame retardant effect are achieved, the problems of poor flame retardant property, large smoke release amount during combustion and the like of common hard high-flame-retardant smoke-suppression polyurethane foaming plastic are effectively solved, and meanwhile the physical and chemical properties of the hard polyurethane foaming plastic are also kept.

Preparation method of hard high-flame-retardant smoke-suppression polyurethane foaming plastic

The invention relates to preparation methods for an amino triazine derivative macromolecular char forming agent and a polypropylene flame retardant. Cyanuric chloride and a solvent are added into a reaction kettle, and alkylamine-containing mixed amine and an acid-binding agent are added dropwise to generate a unitary substituendum; diamine and the acid-binding agent are added dropwise at room temperature to generate a binary substituendum; the amino triazine derivative macromolecular char forming agent is obtained by subsequent treatment, the flame retardant is prepared from the char forming agent, and the flame retardant is high in compatibility in a PP (propene polymer). The preparation methods have the advantages that hydramine is replaced or partially replaced with alkylamine, so that the compatibility of the triazine char forming agent and the PP is improved, and the problem of difficult separation of the triazine char forming agent is solved; with adoption of the non-acetone solvent, the problem of discoloration of the triazine carbonizing agent is solved; the amino triazine derivative macromolecular char forming agent and the polypropylene flame retardant are widely applied to the flame-retardant fields of automobiles, household appliances, building materials and the like.

Preparation methods of amino triazine derivative macromolecular char forming agent and polypropylene flame retardant

The invention discloses a preparation method of aluminium hypophosphite. The preparation method comprises the following steps of: a, preparing a sodium hypophosphite solution; b, preparing an aluminium nitrate solution; and c, uniformly mixing the sodium hypophosphite solution with the aluminium nitrate solution, regulating the pH (potential of Hydrogen) to 2-6, heating and reacting to form the target product aluminium hypophosphite. The method disclosed by the invention has the advantages that the reaction is carried out through directly taking water as solvent and the temperature is lower, so that the reaction is easy to control; the particle size of the obtained aluminium hypophosphite is less than 50 micrometers, the aluminium hypophosphite is white powder and no extra color processing is needed, so that the purity is higher and the yield of the obtained target product is 92-99%; the conventional synthetic process route is simplified and no toxic substance is produced, so that the preparation method is friendly to environment and low in cost; and high-efficiency fire retardant and combustion improver are obtained in the same reaction, so that the resource utilization rate is high and better industrial prospect is provided.

Preparation method of aluminium hypophosphite

The invention discloses a preparation method for polystyrene with high flame retardant property and a prepared polystyrene material Hypophosphite and phenyl phosphinates which serve as halogen-free environment-friendly solid flame retardants and a halogen-free liquid flame retardant are adopted to prepare a composite flame retardant which works on the polystyrene material The preparation method for the polystyrene material comprises the steps of feeding a dispersing agent, an emulsifier, an initiator and styrene into a high-pressure polymerization kettle to generate reaction, and adding the composite flame retardant after a certain conversion rate is achieved; adding a foaming agent after particles are hardened; closing the reaction kettle, heating the reaction kettle, preserving the temperature, and washing and drying to obtain material ball particles; foaming the material ball particles, curing foamed balls under room temperature, and putting the foamed balls into a mold to obtain the polystyrene material with high flame retardant property According to the preparation method and the polystyrene material, the halogen-free environment-friendly solid flame retardants and the halogen-free liquid flame retardant are mixed; the solid phase flame retardants are uniformly dispersed in the liquid phase flame retardant to achieve a synergistic flame retardant effect; the flame retardant performance of the polystyrene material is realized, and various excellent properties of the polystyrene are kept

Polystyrene with high flame retardant property and preparation method thereof

The invention discloses high-flame retardant rigid polyurethane foaming plastic and a preparation method thereof. The preparation method comprises the following steps: evenly mixing polyol, a compound flame retardant, a foaming agent, a foam stabilizer and a catalyst to prepare a polyurethane composition A; controlling the material temperature and mould temperature, adding isocyanate into A, and stirring evenly; and pouring the evenly mixed liquid into a mould for foaming to obtain the high-flame retardant rigid polyurethane foaming plastic after foaming and curing. According to the high-flame retardant rigid polyurethane foaming plastic and the preparation method, halogen-free environment-friendly solid flame retardant aluminum hypophosphite, phenyl aluminum hypophosphite, and halogen-free liquid flame retardant dimethyl methylphosphonate are adopted for being compounded with cyclic phosphonate flame retardant to replace a conventional halogen-containing flame retardant, and a dispersant is adopted for enabling the solid-phase flame retardant to be evenly dispersed in the liquid-phase flame retardant, so as to achieve the effect of efficient synergistic flame retardance, effectively solve the problem that ordinary rigid polyurethane foam plastic is poor in flame retardance, meanwhile also maintain various superior performances of PU (Polyurethane) rigid foam.

High-flame retardant rigid polyurethane foaming plastic and preparation method thereof

The invention discloses a preparation method of aluminum phenylphosphinate. The preparation method comprises the following steps: a. preparing 0.1-1mol/L aluminum nitrate or aluminum sulfate solution; b. slowly dropping the aluminum nitrate or aluminum sulfate solution in dichlorophenylphosphine at 0-40 DEG.C; c. after dropping, heating and adjusting the pH value of the solution, reacting for 1-3 hours at 40-100 DEG.C to generate a target product aluminum phenylphosphinate. The method disclosed by the invention is used for preparing aluminum phenylphosphinate by adopting aluminum nitrate or aluminum sulfate solution and dichlorophenylphosphine to directly react under acidic condition in one-step method, the yield of the target product is 87-96%; the obtained aluminum phenylphosphinate is white powder, the color treatment is unnecessary, and the purity is high; the existing process rout is simplified, the reaction time is short, the environment-friendly is realized, the cost is low, and the method is more suitable for the industrial production.

Yang Jinfei

Papers

Preparation method of aluminium hypophosphite

Polystyrene with high flame retardant property and preparation method thereof

High-flame retardant rigid polyurethane foaming plastic and preparation method thereof

Preparation method of aluminum phenylphosphinate