43results about How to "Has char formation" patented technology

The invention relates to a preparation method of dimethyl silicic acid (chlorine acrylate) diester as a flame resistant plastifier. The structure of the compound is shown in the formula (refer to the Specification), wherein OC3H6Cl refers to OCH2CHClCH3 and OCH(CH2Cl)CH3. The preparation method comprises the following steps: under nitrogen protection, the molar ratio of dimethyl dichlorosilane or dimethyl dibromo-silane to chloropropyl alcohol is 1:2-3, under the temperature of 20-90 DEG C, and in an organic solvent, the reaction is performed for 5-9 hours; through purification, the dimethyl silicic acid (chlorine acrylate) diester is obtained. The dimethyl silicic acid (chlorine acrylate) diester as the flame resistant plastifier, disclosed by the invention, is high in flame resistant efficacy, is good in plasticity, is suitable for the flame resistant plastifier of polyvinyl chloride, polyurethane, epoxy resin, unsaturated resin and the like, is simple in production technology, and is low in cost, and industrialized production is easy to realize.

The invention relates to a method for preparing a flame retardant bis[tri(chloroethoxy)silicon-acyloxy]ethane. The structure of the compound is represented by a formula shown in a drawing. The preparation method comprises the steps of reacting silicon tetrachloride with chloroethanol of a mole which is equal to that of silicon tetrachloride in an organic solvent at the temperature below 20 DEG C, then, dropwise adding glycol of a mole which is 0.5 times that of silicon tetrachloride, heating to the temperature of 50-70 DEG C after completing dripping, and reacting for 5-8 hours; then, dropwise adding chloroethanol of a mole which is 2-3 times that of silicon tetrachloride, and carrying out heat-preservation reaction for 6-9 hours at the temperature of 60-75 DEG C; adding an acid binding agent, and carrying out heat preservation for 1 hour while stirring; purifying, thereby obtaining the flame retardant bis[tri(chloroethoxy)silicon-acyloxy]ethane. The compound disclosed by the invention has high flame retarding efficacy due to the synergism of silicon and chlorine and is suitable for serving as a flame retardant for materials, such as polyvinyl chloride, polyurethane, epoxy resin, unsaturated resin and the like, and the preparation method is simple and is low in cost, so that the industrial production is easy to realize.

The invention discloses a polyethylene color master batch suitable for an irradiation crosslinking process and a preparation method of the polyethylene color master batch, and relates to the field of polyethylene color master batches. Linear low-density polyethylene, high-density polyethylene, maleic anhydride grafted polyethylene, magnesium hydroxide, heavy calcium carbonate, titanium dioxide, an antioxidant, butyl titanate, chlorinated paraffin, a crosslinking aid, pigment and a flame retardant are uniformly mixed; then putting the mixture into a double-screw extruder for extrusion and granulation; the polyethylene color master batch solves the problems that when an existing polyethylene color master batch is applied to radiation crosslinking, the phenomena of oxidative decomposition of a polymer, formation of unsaturated double bonds, material discoloration and the like are caused, the use of the polyethylene color master batch is seriously influenced, and the flame retardance of the color master batch is poor. The antioxidant is added to increase the oxidation resistance of the polyethylene color master batch, the chlorinated paraffin is added to increase the toughness of the color master batch, the flame retardant is added to improve the flame retardance of the color master batch, the crosslinking degree during radiation crosslinking is effectively improved through the crosslinking aid, and the production cost is reduced.

The invention relates to a polymerized organic silicon flame-retardant charring agent polymer and a preparation method thereof, and in particular relates to a flame-retardant charring agent, namely polydimethyl resorcinol silicate and a preparation method. The structure of the polymer is as shown in a formula below (as shown in specification), wherein n ranges from 30 to 80. The preparation method comprises the following steps: in an organic solvent, in the presence of triethylamine, reacting resorcinol with equal molar of dimethyl silane dihalide; or reacting sodium resorcinol with equal molar of dimethyl silane dihalide, and carrying out purifying treatment so as to obtain polydimethyl resorcinol silicate. The polydimethyl resorcinol silicate disclosed by the invention is high in molecular weight, high in decomposition temperature, good in compatibility with materials, free from migration, good in char forming characteristic, and suitable to be used as a flame-retardant charring agents of polyolefin, polyester, polyamide, epoxy resin, unsaturated resin and the like; and the preparation method is simple in production process, low in cost and easy to implement industrial production.

The invention relates to a preparation method of a dimethyl silicate acid di(1,3-dichloroixopropyl) ester compound serving as a flame-retardant plasticizer. The structural formula of the compound is shown in the specification, wherein X is Cl or Br. The preparation method comprises the steps as follows: dimethyl dichloro-silicane or dimethyl dibromo-silane and 1,3-dichloro isopropanol in the mole ratio of 1:(2-3) have a reaction in an organic solvent under the protection of nitrogen for 5-9h at the temperature ranging from 30 DEG C to 70 DEG C, and dimethyl silicate acid di(1,3-dichloroixopropyl) ester is obtained after purification. Dimethyl silicate acid di(1,3-dichloroixopropyl) ester has high flame ratardancy and good compatibility with macromolecular materials and is suitable for being used as the flame-retardant plasticizer of polyvinyl chloride, polyurethane, epoxy resin, unsaturated resin and the like, the production process is simple, the cost is low, and the industrial production is easy to realize.

The invention relates to a flame retardant dimethyl dibromo neopentyl glycol silicate compound and a preparation method thereof. The structure of the dimethyl dibromo neopentyl glycol silicate compound can be shown in the formula (described in the specification). The preparation method of the dimethyl dibromo neopentyl glycol silicate compound comprises the following steps: at the temperature of 20 DEG C, dropwise adding dimethyl dichlorosilane, or dimethyl dibromosilane into an organic solvent solution dissolved with equimolar of dibromo neopentyl glycol, wherein during the dropwise adding, the temperature is controlled to be not higher than 50 DEG C, then heating to 70-130 DEG C within 1-2 hours, carrying out heat preservation and reaction for 4-8 hours, and purifying, so that white solid dimethyl dibromo neopentyl glycol silicate is obtained. The dimethyl dibromo neopentyl glycol silicate has the advantages that silicon and bromine elements are synergistic, flame-retardant efficiency is high, char forming characteristic is good, and material compatibility is good, so that the dimethyl dibromo neopentyl glycol silicate is applicable to serving as flame retardant of materials such as polyolefin, polyurethane, epoxy resin and unsaturated resin; meanwhile, a production process is simple, equipment investment is low, raw materials are available, cost is low, and industrial production can be easily realized.

The invention relates to a fire retardant 2[3(3-bromine propoxy) silicon acyloxy] ethane compound and a preparation method thereof. The structure of the compound is shown as the following formula. The preparation method comprises the following steps: reacting silicon tetrachloride with 3-trimethylene bromohydrin of the same mole of the silicon tetrachloride in organic solvent at below 25 DEG C, then dropwise adding ethanediol 0.5 mole of silicon tetrachloride, rising temperature up to 55-75 DEG C, reacting for 6-10 hours; then dripping 3-trimethylene bromohydrin 2-3 mole of silicon tetrachloride, thermal reacting for 7-10 hours at 65-85 DEG C; then adding acid-binding agent, stirring and performing heat preservation for 1 hour; purifying so as to obtain the fire retardant 2[3(3-bromine propoxy) silicon acyloxy] ethane. The compound has high antiflaming efficiency, is applicable to fire retardants made of materials such as polyvinyl chloride, polyurethane, epoxy resin and unsaturated resin, is simple to prepare, has low cost, and is easy to realize industrial production.

The invention relates to a flame retardant ethylenedioxy dual-silicate propyl bromide compound and a preparation method thereof. The compound has the structure shown as the formula specified in the specification, wherein-OC3H6Br is 2-bromo-1-propoxy or 1-bromo-2-propoxy or a mixture of the 2-bromo-1-propoxy and the 1-bromo-2-propoxy. The preparation method comprises the following steps: dropwise adding bromopropanol into an organic solution of silicon tetrachloride at a temperature being below 25 DEG C, and reacting for 2 hours at 45 DEG C, wherein the molar mass of the bromopropanol is equal to that of the silicon tetrachloride; dropwise adding ethylene glycol and reacting for 6-10 hours at 55-75 DEG C, wherein the molar mass of the ethylene glycol is 0.5 time that of the silicon tetrachloride; cooling to the temperature being below 40 DEG C, dropwise adding the bromopropanol, and reacting for 6-10 hours at 65-85 DEG C, wherein the bromopropanol is 2-3 times that of the silicon tetrachloride; adding a small amount of acid binding agent, preserving heat and stirring for 1 hour; performing purification to obtain the flame retardant ethylenedioxy dual-silicate propyl bromide. The compound disclosed by the invention is suitable to be as the flame retardants of the materials such as polyvinyl chloride, polyurethane, epoxy resin and unsaturated resin, is simple in preparation process and low in cost, and can be put into industrial production easily.

The invention relates to a flame retardant bis[tris(2,3-dichloropropoxy)silicon-acyloxy]ethane compound and a preparation method thereof. The structure of the compound is represented by a formula shown in a drawing. The preparation method comprises the steps of reacting silicon tetrachloride with 2,3-dichloropropanol of a mole which is equal to that of silicon tetrachloride in an organic solvent at the temperature below 25 DEG C, then, dropwise adding glycol of a mole which is 0.5 times that of silicon tetrachloride, heating to the temperature of 65-80 DEG C after completing dripping, and reacting for 7-10 hours; then, dropwise adding 2,3-dichloropropanol of a mole which is 2-3 times that of silicon tetrachloride, and carrying out heat-preservation reaction for 6-9 hours at the temperature of 70-90 DEG C; then, adding an acid binding agent, and carrying out heat preservation for 1 hour while stirring; purifying, thereby obtaining the flame retardant bis[tris(2,3-dichloropropoxy)silicon-acyloxy]ethane. The compound disclosed by the invention has high flame retarding efficacy due to the synergism of silicon and chlorine and is suitable for serving as a flame retardant for materials, such as polyvinyl chloride, polyurethane, epoxy resin, unsaturated resin and the like, and the preparation method is simple and is low in cost, so that the industrial production is easy to realize.