57results about How to "Adapt to high temperature processing" patented technology

The invention relates to a fire retardant alkyl silicic acid trithio phosphonia trioxa bicyclo[2.2.2]octyl methyl ester compound and a preparation method thereof. A structural formula of the compound is as shown in the specification, wherein R refers to CH3, CH3CH2 or CH3CH2CH2. The preparation method includes: performing reaction of alkyl trimethoxy silane or alkyltrichlorosilane with 1-thiophosphonia-4-hydroxymethyl-2,6,7-trioxa bicyclo[2.2.2]octane, and purifying to obtain alkyl silicic acid tri-1-thiophosphonia-2,6,7-trioxa bicyclo[2.2.2]octyl-4-methyl ester. The fire retardant is high in fire retardation efficiency, great in charring effect and suitable for serving as a fire-retardant charring agent for polyesters, polyurethanes, epoxy resin, unsaturated polyester resin and the like, and technical simplicity in production, low cost and easiness for industrial production are realized.

The invention relates to a flame retardant tri-(tribromophenoxy) halogen propoxy silane compound and a preparation method thereof. A structural formula of the compound is as follows as shown in the specification, wherein R is 2-chlorine-1-propyl, 1-chlorine-2-propyl, 3-chlorine-1-propyl, 2-bromine-1-propyl, 1-bromine-2-propyl or 3-bromine-1-propyl. The preparation method comprises the steps that equimolar halogenated propyl alcohol is dropwise added to an organic solution of silicon tetrachloride, and reacts at 30 DEG C for 1h; three times of mole of tribromphenol is added, and reacts at 70-100 DEG C for 6-9h; a solvent is removed by reduced pressure distillation; and tri-(tribromophenoxy) halogen propoxy silane is obtained. Tri-(tribromophenoxy) halogen propoxy silane is good in flame retardancy and plasticity, has charring and dripping prevention functions, has good compatibility with a high polymer material, can serve as a flame retardant of polyvinyl chloride, unsaturated polyester, polyurethane, epoxy resin and the like, raw materials of tri-(tribromophenoxy) halogen propoxy silane are easy to obtain, the production cost is low, the equipment investment is low, a production technology is simple, and the scale production is facilitated.

The invention relates to a triazine macromolecular halogen-free flame-retardant char-forming agent compound and a preparation method thereof. The structure of the compound is as shown in the description, wherein n is larger than 1, X is alcohol amine, and Y is dialkylamine. The preparation method comprises the steps that under the stirring condition, an equimolar amount of alcohol amine is added into a solution of triglycidyl isocyanurate, the temperature is increased to a certain value, and heat preservation reaction is conducted for a period of time to enable the pH of the solution to range from 7 to 8; a certain molar of dialkylamine is added, the temperature is increased to a certain value, and heat preservation reaction is conducted for a period of time to enable the pH of the solution to range from 7 to 8; cooling is conducted, suction filtration (recycling of solvent), water washing, drying and smashing are conducted, and the triazine macromolecular flame-retardant char-forming agent product is obtained. The triazine macromolecular halogen-free flame-retardant char-forming agent is an excellent flame-retardant char-forming agent, has a char-forming anti-dropping effect, is good in compatibility with high molecular materials and excellent in processability and can be used as the flame-retardant char-forming agent of materials such as polyethylene (PE), polypropylene (PP) and silicone rubber; the raw materials of the char-forming agent are low in price and easy to obtain, the production cost is low, the equipment investment is low, the production technology is simple, and scale production is easy.

The invention relates to a dibutyl phenylphosphinate (PPDB) flame retardant composition and an application method thereof. The flame retardant composition is prepared by the steps of compounding one or two of PPDB, chlorinated paraffin-52 (short for CP52), tetrachloroethyl silicate (short for STCE), tetradichloropropyl silicate (short for STDE) or tridichloropropyl phenyl silicate (short for STDPE) according to any ratio, and then, uniformly mixing, wherein the weight parts of both PPDB and CP52 are larger than zero. The flame retardant composition provided by the invention has the advantages of synergistic effect among various elements, good compatibility with materials, high flame-retardant efficiency, low cost and the like, and can be used as a flame retardant for materials such as polyvinyl chloride, polyurethane, unsaturated resin, epoxy resin and the like so as to have favorable application prospects.

The invention relates to a silicic acid-3-(3-bromophenyl)-chloropropyl ethyl ester compound used as a fire retardant and the preparation method thereof. The structural formula of the compound is shown in the specification. The preparation method comprises the following steps: filling ethylene oxide of which the mole is same as that of silicon tetrachloride in silicon tetrachloride organic solution at the temperature of below 20 DEG C, adding tribromophenol of which is three times the mole of silicon tetrachloride, carrying out the thermal reaction for 6-10 hours at the temperature of 100-120 DEG C, and reducing pressure and distilling to remove solvent and a small amount of low boiling point substances to obtain the silicic acid-3-(3-bromophenyl)-chloropropyl ethyl ester compound. The silicic acid-3-(3-bromophenyl)-chloropropyl ethyl ester compound is an excellent fire retardant plasticizer, has carbon-forming and anti-dripping functions and good compatibility with high polymer material, can be used as fire retardants made of polyvinyl chloride, unsaturated polyester, polyurethane, epoxy resin and the like, and is easy to access in raw material, low in production cost, small in equipment investment, simple in production technology, and easy for large-scale production.

The invention relates to a tris[2-(dimethylthioPEPAoxysilyloxy)ethyl] isocyanurate compound and a preparation method thereof. The structure of the compound is shown in the following formula: the preparation method is: Dissolve tris(2-hydroxyethyl)isocyanurate in an organic solvent, add dimethyldihalosilane which is 3 times molar relative to tris(2-hydroxyethyl)isocyanurate, and heat up to 50°C ~70°C, keep warm for 5~9h; cool down to below 30°C, add a certain mole of SPEPA, heat up to 70°C~100°C, keep warm for 6~14h; after purification, tris[2‑(2 MethylthioPEPAoxysilyloxy)ethyl] ester. The flame retardant of the invention has high flame retardant efficiency and good char formation performance, is suitable for use as a flame retardant for polyolefin, polyester, epoxy resin, unsaturated resin, etc., has simple production process, low cost, and is easy to realize industrialized production.

The invention relates to a flame retardant silicic acid di-(tribromophenyl) dichlorohydrin compound and a preparation method thereof. A structural formula of the compound is shown in the specification, wherein n is an integer between 0 and 2. The preparation method comprises the steps that equimolar epoxy propane is dropwise added to an organic solution of silicon tetrachloride, and reacts at 30 DEG C for 30min; twice mole of tribromophenol is added, and reacts at 70-100 DEG C for 3-6h; epoxy propane at a certain mole ratio is dropwise added, and reacts at 60-85 DEG C for 4-6h; a solvent and a low-boiling-point object are removed by reduced pressure distillation; and silicic acid di-(tribromophenyl) dichlorohydrin is obtained. Silicic acid di-(tribromophenyl) dichlorohydrin is an excellent antiflaming plasticizer, has charring and dripping prevention functions, has good compatibility with a high polymer material, and can serve as a flame retardant of polyvinyl chloride, unsaturated polyester, polyurethane, epoxy resin and the like, raw materials of silicic acid di-(tribromophenyl) dichlorohydrin are low in cost and easy to obtain, the production cost is low, the equipment investment is low, a production technology is simple, and the scale production is facilitated.

The invention relates to a flame retardant tetra(tribromophenyl) silicate esterification compound and a preparation method thereof. The structure of the compound is shown in the specification. The preparation method comprises the following steps of: adding tribromophenol of quadruple molar weight into an organic solution of silicon tetrachloride at 30 DEG C; heating to 45 DEG C in one hour, and performing a thermal-insulation reaction for one hour; heating to 100-120 DEG C, and performing a thermal-insulation reaction for 8-12 hours; and performing reduced-pressure distillation to remove the solvent to obtain the product tetra(tribromophenyl) silicate. The tetra(tribromophenyl) silicate provided by the invention is an excellent flame-retardant plasticizer with a charring anti-drop effect and good compatibility with a high-molecular material, and can be used as a flame retardant for the materials such as polyvinyl chloride, unsaturated polyester, polyurethane, epoxy resin and the like; and moreover, the flame retardant has the advantages of cheap and easily-available raw materials, low equipment investment and simple production technology, and is easy to produce in a large scale.

The invention relates to a fire retardant tribromophenoxy tri(dichloro propanolato)silane compound and its preparation method. The structure of the compound is as shown in the formula in the specification, wherein R2=CH2Cl when R1=H; and R2=H when R1=CH2Cl. The preparation method comprises the following steps: dropwisely adding equimolar dichlorohydrin into a silicon tetrachloride organic solution to react at 35 DEG C for 1h, adding equimolar tribromophenol to react at 50-80 DEG C for 2-5h, dropwisely adding double mole times of dichlorohydrin to react at 50-70 DEG C for 3-6h, and carrying out underpressure distillation to remove a solvent so as to obtain a product tribromophenoxy tri(dichloro propanolato)silane. The product is an excellent flame retardation plasticizer, has charcoal-forming and antidrip effects, and can be used as a fire retardant of materials such as polyvinyl chloride, nonsaturated polyester, polyurethane and epoxy resin, etc. Raw materials of the product are cheap and easily available. Production costs are low. Equipment investment is little. The production technology is simple. The preparation method is easy for large-scale production.

The invention relates to a fire retardant - phenyl tri-(phosphonia cyclomethoxy) silane compound and a preparation method thereof. The structure of the compound is shown in the following formula (please see the specifications). According to the preparation method, under the protection of nitrogen, the molar ratio of phenyl trimethoxy silane to 4-ethyl-2,6,7-trioxa-1-phosphonia bicyclo-[2.2.2] octane is controlled between 1 to 3 and 1 to 3.3, the temperature is raised to the level between 130 DEG C and 200 DEG C under the action of catalysts and maintained for reaction for 15-22h, and purification is conducted to obtain phenyl tri-(phosphonia cyclomethoxy) silane. The product is stable in performance, good in fire retarding effect, capable of preventing melting drips and suitable for being used as the fire retardant for nylon, polyester PBT, PET, polyurethane, PC, ABS and other materials; moreover, the production process is simple, equipment investment is little, industrial production is easy, and a good development and application prospect is obtained.

The invention relates to an organic selenium triazine polymer and a preparation method thereof. The structure of the compound is as shown in the description, wherein n is larger than 1, X is alkylamine, and Y is dialkylamino. The preparation method includes the steps that during stirring, alkylamine with the equal molar ratio is added into a triglycidyl isocyanurate solution, then the mixture is heated to a certain temperature, temperature preservation reaction is conducted for a certain period of time, and the pH value of the solution reaches 7-8; a certain molar ratio of dialkylamino is added, the solution is heated to a certain temperature, temperature preservation reaction is conducted for a certain period of time, pH value of the solution reaches 7-8, after cooling, suction filtration with solvents recycled, washing, drying and smashing are conducted, and the product organic selenium triazine polymer is obtained. The organic selenium triazine polymer is a good flame-retardant agent, has the char forming and anti-dripping functions, and is good in compatibility with high polymer materials, good in heat resistance and water resistance, excellent in processing performance and capable of being used as flame-retardant agents such as polyethylene (PE), polypropylene (PP) and silicon rubber. Raw materials are low in price and easy to obtain, production cost is low, equipment investment is little, the production process is simple, and large-scale production is easy.

The invention relates to a colored flame retardant charring agent tetraPEPA oxy-p-benzoquinone compound and a preparation method thereof. The structure of the compound is shown as the following formula in the specification. The preparation method includes: in a reactor equipped with a stirrer, a thermometer and a high-efficiency reflux condensation tube, adding a proper amount of an organic solvent and tetrachloro-p-benzoquinone, then adding a PEPA sodium salt that is 4-5 times the mole of tetrachloro-p-benzoquinone, performing heating to 100-160DEG C, carrying out heat preservation reaction for 6-9h, performing pumping filtration, removing sodium chloride, cooling and crystallizing the filtrate, and conducting filtering and drying, thus obtaining the reddish brown colored flame retardantcharring agent tetraPEPA oxy-p-benzoquinone. The compound provided by the invention has excellent flame retardant and charring properties, also has coloring effect, and is suitable for use as a flameretardant charring agent and coloring agent for nylon, polyester, polyurethane, rubber, polyolefin, unsaturated resin and other materials. Also the preparation method has the characteristics of one-step reaction, simple process and low equipment investment, and is easy to realize industrial production.

The invention relates to a methyl phenyl bis(phosphorous heterocycle methoxy group) silane compound and a preparation method thereof. The structural formula of the compound is shown in the following specifications. The preparation method includes the steps that under protection of nitrogen, the molar ratio of methyl phenyldimethoxysilane to 4-ethyl-2,6,7-trioxa-1-phosphabicyclo (2.2.2) octane is 1:2-1:2.5, under the action of catalyst, temperature is increased to 120 DEG C-180 DEG C, thermal-insulation reaction is performed for 13-19 h, and through purification, the methyl phenyl bis(phosphorous heterocycle methoxy group) silane product is obtained. The compound is suitable for being used as flame retardant of PBT, PET, nylon, PC, polyurethane and furan resin. The production technology is simple, the requirement for environmental friendliness is met, industrialized production is easy to achieve, and good development and application prospects are achieved.

The invention relates to a fire retardant di(tribromophenoxy)dihalidepropoxysilane compound and its preparation method. The structure of the compound is as shown in the formula in the specification, wherein R is 2-chloro-1-propyl, 1-chloro-2-propyl, 3-chloro-1-propyl, 2-bromine-1-propyl, 1-bromine-2-propyl or 3-bromine-1-propyl. The preparation method comprises the following steps: dropwisely adding equimolar halogenated propanol into a silicon tetrachloride organic solution to react at 30 DEG C for 1h, adding tribromophenol which accounts for two times larger than equimolar halogenated propanol to react at 60-90 DEG C for 4-6h, dropwisely adding equimolar halogenated propanol to react at 40-60 DEG C for 3-5h, and carrying out underpressure distillation to remove a solvent so as to obtain di(tribromophenoxy)dihalidepropoxysilane. The product has good flame retardation and plastification properties, has charcoal-forming and antidrip effects, and can be used as a fire retardant of materials such as polyvinyl chloride, nonsaturated polyester, polyurethane, epoxy resin and the like. Raw materials of the fire retardant are easily available; production costs are low; equipment investment is little; the technology is simple; and the preparation method is easy for large-scale production.

The present invention relates to a kind of preparation method of flame retardant methylphenylmethoxy (phosphacyclomethoxy) silane compound, the structure of the compound is shown in the following formula: the preparation method is: under the protection of nitrogen, add an organic solvent, Then add 1-oxygen-1-methyl-4-ethyl-4-hydroxymethyl-2, 6-dioxa-1-phosphorinane and methylphenyldimethoxysilane to control its The molar ratio is 1:1-1:1.4, the temperature is raised to 100-140°C, the temperature at the top of the fractionation column is controlled not to be higher than 65°C, and the generated methanol is fractionated, and the fractionation reaction is 6-10h until the fractionated methanol reaches the theoretical amount. The reaction is stopped, and after purification treatment, methylphenylmethoxyl (phosphacyclomethoxyl) silane is obtained; the product of the present invention has high flame retardancy, good compatibility with macromolecules, and is suitable for use as polyvinyl chloride, polyurethane, Flame retardant for polyester, unsaturated resin, epoxy resin, furan resin, polyvinyl alcohol and other materials. The preparation process is simple, the equipment investment is small, the large-scale production is easy, and the application and development prospects are very good.

The invention relates to a flame retardant benzene siliconic acid bis-1-thiophospha-2,6,7-trioxabicyclo[2.2.2]octyl-4-methyl ester compound and a preparation method thereof. The compound is structurally shown as a formula in the description. The preparation method includes dissolving 1-thiophospha-4-hydroxymethyl-2,6,7- trioxabicyclo[2.2.2]octane into an organic solvent, and dropwise adding phenyl trichlorosilane to react for 6-10 hours at 40-100 DEG C; adding distilled water, and reacting for 2 hours at 100 DEG C; purifying so as to obtain the benzene siliconic acid bis-1-thiophospha-2,6,7-trioxabicyclo[2.2.2]octyl-4-methyl ester. The flame retardant has the advantages of high flame retarding efficiency and good char forming effect, thereby being suitably used as a flame-retardant charring agent for polyester, polyurethane, epoxy resin and unsaturated polyester resin. The preparation method has the advantages of simple production technology, low cost and easiness for industrialized production.

The invention relates to a flame retardant silicic acid di-(tribromophenyl) dichlorohydrin compound and a preparation method thereof. A structural formula of the compound is as follows as shown in the specification, wherein n is an integer between 0 and 2. The preparation method comprises the steps that equimolar epoxy propane is dropwise added to an organic solution of silicon tetrachloride, and reacts at 30 DEG C for 30min; twice mole of tribromophenol is added, and reacts at 70-100 DEG C for 3-6h; epoxy propane at a certain mole ratio is dropwise added, and reacts at 60-85 DEG C for 4-6h; a solvent and a low-boiling-point object are removed by reduced pressure distillation; and silicic acid di-(tribromophenyl) dichlorohydrin is obtained. Silicic acid di-(tribromophenyl) dichlorohydrin is an excellent antiflaming plasticizer, has charring and dripping prevention functions, has good compatibility with a high polymer material, and can serve as a flame retardant of polyvinyl chloride, unsaturated polyester, polyurethane, epoxy resin and the like, raw materials of silicic acid di-(tribromophenyl) dichlorohydrin are low in cost and easy to obtain, the production cost is low, the equipment investment is low, a production technology is simple, and the scale production is facilitated.

The invention relates to a silicic acid-3-(3-bromophenyl)-chloropropyl ethyl ester compound used as a fire retardant and the preparation method thereof. The structural formula of the compound is shown in the specification. The preparation method comprises the following steps: filling ethylene oxide of which the mole is same as that of silicon tetrachloride in silicon tetrachloride organic solution at the temperature of below 20 DEG C, adding tribromophenol of which is three times the mole of silicon tetrachloride, carrying out the thermal reaction for 6-10 hours at the temperature of 100-120 DEG C, and reducing pressure and distilling to remove solvent and a small amount of low boiling point substances to obtain the silicic acid-3-(3-bromophenyl)-chloropropyl ethyl ester compound. The silicic acid-3-(3-bromophenyl)-chloropropyl ethyl ester compound is an excellent fire retardant plasticizer, has carbon-forming and anti-dripping functions and good compatibility with high polymer material, can be used as fire retardants made of polyvinyl chloride, unsaturated polyester, polyurethane, epoxy resin and the like, and is easy to access in raw material, low in production cost, small in equipment investment, simple in production technology, and easy for large-scale production.

The invention relates to a flame retardant tri(chloropropyl)tribromophenyl silicate esterification compound and a preparation method thereof. The structure of the compound is shown in the specification, wherein n is an integer from 0 to 3. The preparation method comprises the following steps of: controlling the temperature below 30 DEG C; dropwise adding equimolar epoxypropane into an organic solution of silicon tetrachloride, and adding equimolar tribromophenol; performing a thermal-insulation reaction at 50-70 DEG C for 2-4 hours; cooling to 40 DEG C; dropwise adding epoxypropane of a certain molar ratio, and performing a thermal-insulation reaction at 45-70 DEG C for 3-6 hours; distilling out excessive epoxypropane; and performing reduced-pressure distillation to remove the solvent and a few low-boiling point substances to obtain the product tri(chloropropyl)tribromophenyl silicate. The tri(chloropropyl)tribromophenyl silicate provided by the invention is an excellent flame-retardant plasticizer with a charring anti-drop effect and good compatibility with a high-molecular material, and can be used as a flame retardant for the materials such as polyvinyl chloride, unsaturated polyester, polyurethane, epoxy resin and the like; and moreover, the flame retardant has the advantages of cheap and easily-available raw materials, low production cost, low equipment investment and simple production technology, and is easy to produce in a large scale.

The invention relates to a tetrabromobisphenol A polydimethylsilicate polymer and a preparation method thereof. The structure of the polymer is as follows: n=10-60. The preparation method is: in the presence of triethylamine, react tetrabromobisphenol A with equimolar dimethyldihalosilane in an organic solvent; or tetrabromobisphenol A sodium and equimolar dimethyldihalosilane Reaction; After purification, tetrabromobisphenol A polydimethylsilicate was obtained. The polydimethylsilicate tetrabromobisphenol A ester of the present invention has large molecular weight, good compatibility with materials, low mobility and high flame retardant efficiency, and is suitable for polyolefin, polyester, polyurethane, polyamide and epoxy resin , unsaturated resin, etc., and the production process is simple, the cost is low, and it is easy to realize industrial production.

The invention relates to a sulfur-containing macromolecule triazine polymer and a preparation method thereof. The structural formula of the compound is shown in the description, wherein N is larger than 1, X is alkylamine, and Y is dialkylamine. The preparation method comprises the steps that alkylamine is equimolarly added into a solution of triglycidyl isocyanurate with stirring, then, the temperature is increased to a certain temperature, and a reaction is performed for a period of time to enable pH of the solution to reach 7-8; a certain mole of dialkylamine is added, the temperature is increased to a certain temperature, a heat-insulated reaction is performed for a period of time to enable pH of the solution to reach 7-8, suction filtration is performed for solvent recycling after cooling, then, washing, drying and smashing are performed, and therefore the sulfur-containing macromolecule triazine polymer is obtained. The sulfur-containing macromolecule triazine polymer is the good flame retardant charring agent, has the charring anti-drop effect, can be well compatible with high polymer materials, and is good in heat and water resistance, excellent in processing performance and capable of being as the flame retardant charring agent for polyethylene (PE), polypropylene (PP), silicone rubber and other materials; the raw materials are cheap and easy to obtain, the production cost is low, equipment investment is small, the production process is simple, and large-scale production is easy.

The invention relates to a method for preparing the flame-retardant agent of a methylphenyl silicic acid bis(phosphorous heterocyclic methyl) ester compound. The structure of the compound is as shown in the description. The preparation method includes the steps that nitrogen gas is used for replacing air in a reactor provided with an efficient fractionation device, the molar ratio of dimethoxymethylphenylsilane to 1-oxo-1-methyl-4-ethyl-4-methylol-2,6-dioxa-1- phosphorinane is controlled to be 1:2-1:2.6, the temperature is raised to 100-160 DEG C, the temperature of the top of a dephlegmator is controlled to be not higher than 65 DEG C, generated methyl alcohol is fractionated, a fractionation reaction is carried out for 9-17 hours, the reaction does not stop till the fractionated methyl alcohol reaches a theoretical amount, and methylphenyl silicic acid bis(phosphorous heterocyclic methyl) ester is obtained after purification. The flame-retardant agent is stable in structure performance, high in decomposition temperature and suitable for being used as flame retardancy of polyester PBT, PET, nylon, PC and other materials. The preparation technology is simple, equipment investment is little, large-scale production is easy, and application and development prospects are good.

The invention relates to a methyl phenyl bis(phosphorous heterocycle methoxy group) silane compound and a preparation method thereof. The structural formula of the compound is shown in the following specifications. The preparation method includes the steps that under protection of nitrogen, the molar ratio of methyl phenyldimethoxysilane to 4-ethyl-2,6,7-trioxa-1-phosphabicyclo (2.2.2) octane is 1:2-1:2.5, under the action of catalyst, temperature is increased to 120 DEG C-180 DEG C, thermal-insulation reaction is performed for 13-19 h, and through purification, the methyl phenyl bis(phosphorous heterocycle methoxy group) silane product is obtained. The compound is suitable for being used as flame retardant of PBT, PET, nylon, PC, polyurethane and furan resin. The production technology is simple, the requirement for environmental friendliness is met, industrialized production is easy to achieve, and good development and application prospects are achieved.

The invention relates to a fire retardant di(tribromophenoxy)dihalidepropoxysilane compound and its preparation method. The structure of the compound is as shown in the formula in the specification, wherein R is 2-chloro-1-propyl, 1-chloro-2-propyl, 3-chloro-1-propyl, 2-bromine-1-propyl, 1-bromine-2-propyl or 3-bromine-1-propyl. The preparation method comprises the following steps: dropwisely adding equimolar halogenated propanol into a silicon tetrachloride organic solution to react at 30 DEG C for 1h, adding tribromophenol which accounts for two times larger than equimolar halogenated propanol to react at 60-90 DEG C for 4-6h, dropwisely adding equimolar halogenated propanol to react at 40-60 DEG C for 3-5h, and carrying out underpressure distillation to remove a solvent so as to obtain di(tribromophenoxy)dihalidepropoxysilane. The product has good flame retardation and plastification properties, has charcoal-forming and antidrip effects, and can be used as a fire retardant of materials such as polyvinyl chloride, nonsaturated polyester, polyurethane, epoxy resin and the like. Raw materials of the fire retardant are easily available; production costs are low; equipment investment is little; the technology is simple; and the preparation method is easy for large-scale production.

The invention relates to a diisopropyl phenylphosphinate (PPDI) flame retardant composition and an application method thereof. The flame retardant composition is prepared by the steps of compounding one or two of PPDI, chlorinated paraffin-52 (short for CP52), tetrachloroethyl silicate (short for STCE), tetradichloropropyl silicate (short for STDE) or tridichloropropyl phenyl silicate (short for STDPE) according to any ratio, and then, uniformly mixing, wherein the weight parts of both PPDI and CP52 are larger than zero. The flame retardant composition provided by the invention has the advantages of synergistic effect among various elements, good compatibility with materials, high flame-retardant efficiency, low cost and the like and can be used as a flame retardant for materials such as polyvinyl chloride, polyurethane, unsaturated resin, epoxy resin and the like so as to have favorable application prospects.

The invention relates to a methylphenyl methoxy silicic acid phosphine heterocylic methyl ester compound as a fire retardant and a preparation method thereof. The structure of the compound is shown in the following formula (as shown in the description). The preparation method comprises the following steps of under nitrogen protection, controlling the molar ratio of 4-ethyl-2,6,7-trioxa-1-phosphabicyclo[2.2.2]octane to methylphenyl dimethoxysilanes to be 1:1 to1:1.4; under the action of a catalyst, enabling the temperature to rise to 120-170 DEG C, and performing a heat insulating reaction for 11-17 hours; and through purification treatment, obtaining methylphenyl methoxy silicic acid phosphine heterocylic methyl ester. The product disclosed by the invention is suitable for being used as the fire retardant of materials of unsaturated resins, polyvinyl chloride, polyurethane, epoxy resins, furan resins and the like. The production technology is simple, the equipment investment is low, and the industrialized production is easy to realize.

The invention relates to a diisopropyl phenylphosphinate (PPDI) flame retardant composition and an application method thereof. The flame retardant composition is prepared by the steps of compounding one or two of PPDI, chlorinated paraffin-52 (short for CP52), tetrachloroethyl silicate (short for STCE), tetradichloropropyl silicate (short for STDE) or tridichloropropyl phenyl silicate (short for STDPE) according to any ratio, and then, uniformly mixing, wherein the weight parts of both PPDI and CP52 are larger than zero. The flame retardant composition provided by the invention has the advantages of synergistic effect among various elements, good compatibility with materials, high flame-retardant efficiency, low cost and the like and can be used as a flame retardant for materials such as polyvinyl chloride, polyurethane, unsaturated resin, epoxy resin and the like so as to have favorable application prospects.