38results about How to "Prevent molten dripping" patented technology

The invention discloses a halogen-free flame-retardant cold-resistant polycarbonate alloy which comprises the following components in parts by weight: 75-93 parts of PC resin, 5-10 parts of a cold-resistant toughening agent, 1.1-5.5 parts of a flame retardant, 0.5-5 parts of a synergistic flame retardant, 0.4-2 parts of an antioxidant, 0.2-0.5 part of an ultraviolet light absorber, and 0.2-0.6 part of an anti-dripping agent. The product disclosed by the invention has good flame retardancy, the flame retardancy of a sample strip with the thickness of 1.5 mm / 3.0 mm reaches the UL94V-0 level, the use of polytetrafluoroethylene can prevent the melting and dripping of the product and can improve the flame retardancy of the product, the fire retardant consumption is reduced to further ensure that the flame retardancy of the product reaches the UL94V-0 level, the production cost of the product is reduced, and the competitiveness of the product is improved; besides, other mechanical properties of the product are not affected in case of higher impact strength, and the overall performance is excellent; the product has the characteristics of good low temperature resistance and good processing property. The alloy material is applicable to the fields of industry, communications and transport, military industry, aerospace and the like.

The present invention relates to a flame retardant alkyl dimethoxyphosphine heterocyclic methyl silicate compound and a preparation method thereof. The structure of the compound is shown in the following formula: where R=methyl, ethyl, propyl or butyl base. The preparation method is: under nitrogen protection, control the molar ratio of 4-ethyl-2,6,7-trioxa-1-phosphabicyclo[2.2.2]octane to alkyltrimethoxysilane to be 1:1 -1:1.5, under the action of catalyst, heat to reflux, at 100-180°C, reflux and keep warm for 10-20h, after purification, get alkyl dimethoxyphosphine heterocyclic methyl silicate. The product of the invention is suitable as a flame retardant for materials such as polyester PBT, PET, polyurethane, unsaturated resin, epoxy resin, etc.; and the production process is simple, equipment investment is small, and industrial production is easy to realize.

The invention relates to a method for preparing a flame retardant organosilicon cyclic phosphine compound. The structure of the compound is shown in the following formula: in the formula, R=methyl, ethyl, propyl or butyl. The preparation method is: replace the air in the reactor with hydrogen chloride absorption device with nitrogen, alkyl trichlorosilane and 1-oxygen-1-methyl-4-ethyl-4-hydroxymethyl-2, 6- Dioxa-1-phosphorinane is reacted in an organic solvent with a molar ratio of 1:3-1:3.5, reacted at 80-150°C for 10-18h, and after the hydrogen chloride is released, it is purified to obtain Organosilicon phosphine compounds. The product of the present invention has high flame retardant efficiency, and also has the effect of charring and anti-dripping, and is suitable for use as a flame retardant for polyester PBT, PET, PS, PP, PC, ABS and other materials; and the production process is simple, the equipment investment is small, and it is easy to use. Realize industrialized 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 high-temperature-resistant soft control cable for maritime oil and gas engineering and a manufacturing method thereof. The cable is characterized in that a chemical cross-linked polyolefin insulation layer is extruded at the periphery of a 0.35-2.5mm<2> tin-plated annealed stranded copper conductor to form an insulation wire core; a plurality of insulation wire cores are twisted to the right at 20-24 times of standing lay ratio to form a cable core; an inner sheath is extruded at the periphery of the cable core; the inner sheath inner sheath inner sheath is coated with a copper alloy wire weaving armor layer at the periphery; the periphery of the copper alloy wire weaving armor layer is wrapped with a water-proof wrapping tape; and an outer sheath is extruded at the periphery of the water-proof wrapping tape. The insulation layer is prepared from the following raw material components: 12 parts of ethylene / vinyl acetate copolymer, 6 parts of high density polyethylene, 2 parts of ethylene-methacrylic acid copolymer, 0.5-1 part of cross-linking agent DCP (Dicumyl Peroxide), 0.4-0.9 part of antioxidant 1076; 0.2-0.4 part of antioxidant DNP, 0.2-1 part of lubricant stearic acid, 25-30 parts of aluminum hydroxide, 0.6-1 part of red phosphorus, and 0.05-0.1 part of ultraviolet ray absorber UV-326. The insulation layer of the cable is excellent in high-temperature resistance and ageing resistance, and long in service life.

The invention relates to the technical field of paint, in particular to a preparation method of flame-retardant polyurea elastomer paint. The polyurea elastomer paint is prepared from a component A and a component B. The preparation method comprises the following steps: (1) dehydrated siloxane polyether glycol, diisocyanate and a diluent are mixed uniformly in a reaction kettle, and then subjectedto a reaction for 2-4 hours at 80-95 DEG C, and the component A is obtained; (2) dehydrated amino-terminated polyether and a dehydrated amine chain extender are uniformly mixed with organic aluminumhypophosphite, polytetrafluoroethylene, ammonium polyphosphate, dipentaerythritol and additives in a reaction kettle, stirring is performed at 60-120 DEG C for 1-2 h, and the component B is obtained.The polyurea elastic resin prepared from a flame retardant and polyurea resin by compounding has excellent flame retardancy and thermal stability.

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 preparation method of an aryl silicon cyclic phosphate compound as a fire retardant. The structural formula of the compound is as shown in the specification. The preparation method comprises the following steps: replacing the air in a reactor with a hydrogen chloride absorption device with nitrogen; reacting phenyl trichlorosilane with 1-oxy-1-methyl-4-ethyl-4-hydroxymethyl-2,6-dioxa-1-phosphorinane in an organic solvent at 100-150 DEG C for 13-21h, wherein the mole ratio of the two substances is 1:3 to 1:3.8; and after the hydrogen chloride is all released, purifying the product to obtain the aryl silicon cyclic phosphate compound. The fire retardant is stable in physical and chemical performance, high in decomposition temperature, good in fire retarding effect, simple in preparation process, low in equipment investment and easy to produce in large scale, is suitable for being as a fire retardant of the materials such as polyester PBT, PET, polyurethane, nylon, epoxy resin and polyvinyl chloride, and has good application and development prospects.