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

The invention discloses chemical crosslinking polyolefin insulating rubber for an offshore oil gas engineering cable in the field of cables and a manufacturing method. The raw materials include 12 parts of ethylene/vinyl acetate copolymer, 6 parts of HDPE (high-density polyethylene), 2 parts of ethylene/methacrylic acid copolymer, 0.5-1 part of crosslinking agent DCP (dicumyl peroxide), 0.4-0.9 part of antioxidant 1076, 0.2-0.4 part of antioxidant DNP (N,N'-di-2-naphthyl-p-phenylenediamine), 0.2-1 part of stearic acid, 25-30 parts of aluminum hydroxide, 0.6-1 part of red phosphorus and 0.05-0.1 part of ultraviolet absorbent UV-326. The method comprises the following steps of: firstly adding the ethylene/vinyl acetate copolymer, the HDPE and the ethylene/methacrylic acid copolymer, and uniformly plastifying and mixing; adding the antioxidant, the ultraviolet adsorbent and flame retardant, and mixing uniformly before blanking; adding a lubricant and the crosslinking agent and mixing uniformly; and performing triangle packaging on the mixed glue, thinning for 4-6 times, and cutting and cooling for use. The insulating rubber has high heat resistance level and excellent ultraviolet resistance, seawater moisture erosion resistance and oil aging resistance.

The invention relates to an alkyl dimethoxy silicic phosphine heterocyclic methyl ester compound and a preparing method thereof. The structure of the compound is shown in the following formula (see the formula in description), wherein R represents a methyl, or ethyl, or propyl or butyl group. The preparing method includes the steps that under protection of nitrogen, the molar ratio of 4-ethyl-2,6,7-trioxa-1-phosphine heterobicyclic [2.2.2] octane to alkyl trimethoxy silane is controlled to be 1:1-1:1.5, under the action of a catalyst, 4-ethyl-2,6,7-trioxa-1-phosphine heterobicyclic [2.2.2] octane and alkyl trimethoxy silane are heated to reflux and react for 10-20 h at the temperature of 100 DEG C-180 DEG C on the reflux and heat-preserving conditions, and alkyl dimethoxy silicic phosphine heterocyclic methyl ester is obtained through purification. The alkyl dimethoxy silicic phosphine heterocyclic methyl ester compound is suitable for serving as fire retardant of polyester PBT, PET, polyurethane, unsaturated resin, epoxy resin and the like. The production process is simple, equipment investment is small, and industrial production is easy to realize.

The invention relates to a high-temperature-resistant soft non-shield instrument 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 0.35-2.5mm2 tin-plated annealed stranded copper conductor to form an insulation wire core; every two insulation wire cores are twisted to form twisted wire groups, and all the twisted wire groups are stranded to form a cable core; an inner sheath is extruded at the periphery of the cable core; the periphery of the inner sheath is coated with a copper alloy wire weaving armor layer; 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 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 a preparation method of an alkyl - dimethoxy (phosphorus heterocycle) silane compound as a fire retardant. The structure of the compound is shown in the following formula (as shown in the description), wherein R is equal to methyl, ethyl, propyl or butyl. The preparation method comprises the following steps of using nitrogen for replacing air in a reactor, controlling the molar ratio of 1-oxo methyl-4-ethyl -4-methylol-2,6-dioxa-1-phosphorus heterocycle hexane to alkyl group trimethoxysilane to be 1:1 to 1:1.4, and performing a reaction at 80-130 DEG C in an organic solvent; controlling the top temperature of a fractionating column to be equal to or lower than 65 DEG C, and performing a fractional distillation reaction for 6-13 hours until no methanol is generated; and through purification treatment, obtaining alkyl-dimethoxy (phosphorus heterocycle) silane. The product disclosed by the invention is high in flame resistant efficiency, good in carbon forming performance, good in plasticity, and suitable for being used as the fire retardant of materials of polyester PBT, PET, polyurethane, unsaturated resins, epoxy resins, polyvinyl chloride 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 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 dodecyl dimethyoxy phosphonic heterocyclic 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 and dodecyl trimethoxysilane to be 1:1 to 1:1.4, and under the action of a catalyst, enabling the temperature to rise to 130-180 DEG C; and through purification treatment, obtaining products of dodecyl dimethyoxy phosphonic heterocyclic methyl ester. The dodecyl dimethyoxy phosphonic heterocyclic methyl ester compound disclosed by the invention is suitable for being used as a fire retardant of materials, polyvinyl chloride, polyurethane, unsaturated resins, epoxy resins, furan resins, polyvinyl alcohol and the like, is simple in production technology and low in equipment investment, and industrialized production is easy to realize.

The invention relates to an organic silicon flame-retardant carbon-forming agent 1-methyl-4-ethyl-1-silicon hetero-2,6,7-trioxygen hetero double-cycle[2,2,2]-octane compound and a preparation method thereof. The structure of the compound is shown as the following formula in the specification. The preparation method comprises the following step of reacting methyl trichlorosilane or methyltrimethoxy silane with trimethylolpropane in an organic solvent to prepare the 1-methyl-4-ethyl-1-silicon hetero-2,6,7-trioxygen hetero double-cycle[2,2,2]-octane. The organic silicon flame-retardant carbon-forming agent belongs to a halogen-free and non-toxic flame-retardant carbon-forming agent, has high flame-retardant performance and high carbon-forming property, can effectively prevent materials from melting and dropping off, has stable physical and chemical properties, high compatibility with a macromolecular material, low cost and a simple process, and is easy in industrialized production.

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.

The invention relates to a preparing method for a phosphorus-silicon synergistic flame retardant phenyl dimethoxy (phosphor heterocycle methoxyl) silicane compound. The structure of the compound is as shown in the description. The preparing method comprises the steps that under protection of nitrogen, the mole ratio of 1-oxo-1-methyl-4-ethyl-4-hydroxymethyl-2,6-dioxa-1-phosphorinane to phenyl trimethoxy silane is controlled to be 1:1-1:1.4, organic solvent is added, temperature is raised to 100 DEG C-140 DEG C, the temperature of a fractional distillation column top is controlled to be not higher than 65 DEG C, generated methyl alcohol is distilled, the fractional distillation reaction is carried out for 5-9 h, the reaction is not stopped until the quantity of methyl alcohol distilled reaches the theory amount, and purification is carried out to obtain phenyl dimethoxy (phosphor heterocycle methoxyl) silicane. The compound is suitable for serving as flame retardant of materials such as polyvinyl chloride, polyurethane, unsaturated polyester resin, epoxy resin, furan resin and polyvinyl alcohol, the production technology is simple, equipment investment is small, industrialized production is achieved easily, and the compound has good application and development prospects.