2039 results about "Chloride vinyl" patented technology

The invention relates to a synthesis method of 1, 2-bis (4-vinyl phenyl) ethane, which comprises the following steps: 1) under the action of magnesium or zinc, carrying out self-coupling reaction on benzyl halide at a benzyl position to obtain 1, 2-bis (4-halogen phenyl) ethane, and 2) preparing the 1, 2-bis (4-vinyl phenyl) ethane from the 1, 2-bis (4-halogen phenyl) ethane, which is selected from any one of the following schemes: 2i: carrying out self-coupling reaction on the 1, 2-bis (4-vinyl phenyl) ethane obtained in the step 1) to obtain the 1, 2-bis (4-vinyl phenyl) ethane. The preparation method comprises the following steps: preparing a Grignard reagent from 1, 2-bis (4-halogen phenyl) ethane, and coupling the Grignard reagent with vinyl chloride to prepare 1, 2-bis (4-vinyl phenyl) ethane; and (2iii) coupling the 1, 2-bis (4-halogen phenyl) ethane obtained in the step (1) with vinyl magnesium chloride to prepare the 1, 2-bis (4-vinyl phenyl) ethane. According to the invention, the 1, 2-bis (4-vinyl phenyl) ethane is prepared from p-benzyl halide through two-step reaction at a relatively high yield, and the yield of the two-step reaction can reach 86.9%.

The invention discloses a wear-resistant and impact-resistant composite PVC material and a preparation method thereof, and belongs to the technical field of high polymer materials, the wear-resistant and impact-resistant composite PVC material comprises the following raw materials by weight: 80-100 parts of epoxy polyvinyl chloride, 10-15 parts of a plasticizing stabilizer, 10-12 parts of an impact modifier, 0.5-2 parts of a lubricant, 5-10 parts of a filler, 2-3 parts of an antioxidant and 2-3 parts of a heat stabilizer; the preparation method comprises the following steps: preparing a metal soap stabilizer, absorbing pyrolysis gas, decomposing to generate metal chloride, enhancing the flame retardant property of the material, and uniformly dispersing the metal soap stabilizer as a filler in the material, so that an epoxy group in the prepared modifier absorbs hydrogen chloride and hybridizes a polyvinyl chloride chain segment at the same time, thereby enhancing the flame retardant property of the material. And a double-bond structure reacts with pyrolysis free radicals to generate an annular structure, so that the impact resistance of the material is enhanced.

The invention discloses a high-barrier polycrystalline silicon packaging film and a preparation method thereof, and relates to the technical field of packaging materials. The high-barrier polycrystalline silicon packaging film consists of a polyester film carrier and functional slurry, the functional slurry is prepared from the following raw materials in parts by weight: 15 to 25 parts of ethylene-vinyl alcohol copolymer, 10 to 18 parts of polyvinylidene chloride, 5 to 10 parts of modified nano montmorillonite, 8 to 15 parts of modified polylactic acid, 3 to 6 parts of tributyl citrate, 1 to 3 parts of antioxidant 1010, 1 to 3 parts of ultraviolet light absorber UV-531, 0.5 to 1.5 parts of nucleating agent NA-11, 1 to 2 parts of silane coupling agent KH-550 and 3 to 7 parts of modified silicon dioxide aerogel; 2 to 5 parts of vinyl trimethoxy silane, 1 to 3 parts of nano silver and 20 to 30 parts of deionized water. The high-barrier polycrystalline silicon packaging film has excellent barrier performance, and can effectively block oxygen, water vapor and the like. The polycrystalline silicon packaging film is good in mechanical performance, not prone to damage, antibacterial, antioxidant and anti-ultraviolet, the quality guarantee period of polycrystalline silicon can be prolonged, the product quality can be guaranteed, and the polycrystalline silicon packaging film has great application value in the field of polycrystalline silicon packaging.

The invention belongs to the technical field of iodine-resistant material preparation, and particularly discloses a high-barrier composite packaging material and a preparation method thereof.The high-barrier composite packaging material is composed of an aluminum foil layer, a vinyl resin heat-seal coating, a composite coating, a VC glue coating, a polyurethane heat-seal coating and a polyvinyl chloride sheet from top to bottom; wherein the composite coating is obtained by coating a coating liquid, and a preparation method of the coating liquid comprises the following steps: (1) adding PVA resin into deionized water, stirring, then adding a first part of functional particles, and heating and stirring to obtain a solution I for later use; (2) adding polylactic acid into the mixed solution, stirring, then adding the second part of functional particles, and heating and stirring to obtain a solution II; and (3) adding the obtained solution I into the obtained solution II, and uniformly stirring. The iodine-resistant packaging material prepared by the invention is good in iodine resistance, oxygen resistance and water vapor resistance, good in tensile strength and excellent in comprehensive performance.

The invention provides a foamed rubber and plastic material without nitrosamine and a preparation method thereof, and relates to the technical field of foamed rubber and plastic materials. The foamed rubber-plastic material free of nitrosamine is prepared from nitrile rubber, polyvinyl chloride, chlorinated polyethylene, chlorinated paraffin, epoxidized soybean oil, aluminum hydroxide, a foaming agent, a foaming promoter, carbon black, an organic silicon modifier, antimony trioxide, solid paraffin, stearic acid, polyethylene glycol, sulfur, an anti-aging agent, a vulcanization accelerator and the like. The vulcanization accelerator provided by the invention is an accelerator ZBEC and an accelerator TBzTD. According to the invention, by adjusting the composition and proportion of the raw materials and combining the use of the composite vulcanization accelerator, the preparation of the foamed rubber and plastic material without nitrosamine is realized, and the environmental protection property and safety of the product are improved.

The invention relates to an impact-resistant chlorinated polyvinyl chloride composite material and a preparation method thereof, and belongs to the technical field of polymer composite materials. The composite material comprises the following components: 100 parts of CPVC resin, 6.5 to 9.5 parts of a modified impact modifier, 2.6 to 3.2 parts of a heat stabilizer, 1.5 to 2 parts of a lubricant, 1.2 to 1.6 parts of a processing aid, 0.2 to 0.25 part of a light stabilizer and 8 to 11 parts of a filler, the modified impact modifier takes a POSS cage structure as a core, a branch chain sequentially contains thioamide-secondary amine-tertiary amine structures, a polarity gradient is formed and fully extends into a macromolecular chain of CPVC to transmit and dissipate impact energy, meanwhile, the amine structure interacts with chlorine groups in a molecular chain of CPVC to form molecular anchoring, expansion of crazes is inhibited, and the impact strength of the CPVC is improved. The continuity and the stability of a bonding interface are maintained, so that the composite material keeps relatively high mechanical strength and thermal stability.

The invention relates to the field of cables, and discloses a modified polyvinyl chloride composite material for cables and a preparation method thereof.The composite material comprises low-density polyethylene, polyvinyl chloride, ethylene-vinyl acetate copolymer, nitrile rubber, modified graphene oxide, modified nano calcium carbonate and auxiliaries; the modified graphene oxide is prepared by reacting acylating chlorination of graphene oxide with an anti-aging derivative, the anti-aging derivative is prepared by reducing a benzoxazole-containing intermediate generated by a reaction of 2-amino-4-bromophenol and 4-cyanobenzaldehyde to obtain an aminated benzoxazole-containing intermediate, then the aminated benzoxazole-containing intermediate reacts with p-phenylenediamine, and then the product reacts with 3-(3, 4-dichlorophenyl)-1, 2, 3-triazole-3-one to obtain the anti-aging graphene oxide. 2, 5-di-tert-butyl-4-hydroxyphenyl) propionyl chloride is subjected to a reaction to prepare the product. And the modified nano calcium carbonate is prepared by reacting phosphonitrilic chloride trimer with an amino silane coupling agent and 2-amino benzoxazole-5-borate and then grafting on the surface of the nano calcium carbonate. The composite material prepared by the invention has excellent flame retardance, heat resistance and long-acting oxidation resistance.

The invention provides an outdoor hard polyvinyl chloride material and a preparation method and a product thereof. The outdoor hard polyvinyl chloride material is prepared from the following raw materials in parts by weight: 80 to 100 parts of polyvinyl chloride resin, 15 to 50 parts of chlorinated polyvinyl chloride resin, 50 to 100 parts of acrylonitrile-styrene-acrylate terpolymer, 3 to 15 parts of impact modifier, 0.1 to 5.0 parts of processing aid, 0.1 to 5.0 parts of lubricant and 0 to 10 parts of other aids. The impact modifier comprises a methyl methacrylate-butadiene-styrene terpolymer and chlorinated polyethylene, and the processing aid comprises ACR acrylic resin. The lubricant includes a first lubricant and a second lubricant. The melting point of the first lubricant is 20-70 DEG C, and the melting point of the second lubricant is 100-115 DEG C. The outdoor rigid polyvinyl chloride material has the advantages of excellent compatibility of the components, high impact strength, high weather resistance and low specific gravity, and meets the use requirements of base station antenna housing materials.

The utility model relates to the technical field of reactors, in particular to a reactor for synthesizing vinyl chloride and a system for synthesizing vinyl chloride. The reactor shell comprises a cylindrical barrel, an upper sealing head and a lower sealing head; an upper top plate is fixedly arranged between the cylinder body and the upper sealing head; a lower bottom plate is fixedly arranged between the cylinder body and the lower sealing head; a plurality of heat exchange tubes are fixedly connected between the upper top plate and the lower bottom plate; the heat exchange tubes are of a hollow structure, and a hollow core tube with the two ends closed is arranged in the center of each heat exchange tube. The core tube is movably connected in the heat exchange tube through a positioning sheet; and the core tube and the positioning sheet are fixedly and / or movably connected.

The invention discloses an HPVC power cable protection pipe and a preparation method thereof, and relates to the technical field of cable protection pipes. The HPVC power cable protection tube is at least prepared from the following raw materials in parts by weight: 100 parts of high-strength polyvinyl chloride, 35 to 45 parts of epoxy acrylate rubber, 5 to 8 parts of vinyl chloride-g-acrylate copolymer, 8 to 12 parts of epoxidized soybean oil, 3 to 5 parts of calcium-zinc composite stabilizer, 5 to 15 parts of modified hydrotalcite, 0.1 to 0.5 part of beta-diketone, 0.8 to 1.5 parts of calcium stearate and 10 to 20 parts of flame retardant. 12 to 15 parts of modified nano calcium carbonate, 5 to 8 parts of talcum powder, 0.6 to 1.2 parts of antioxidant, 1 to 2 parts of anti-aging agent 4010 and 0.5 to 1.5 parts of ultraviolet light absorber UV531; the modified hydrotalcite is obtained by adding a mixed solution of calcium nitrate and lanthanum nitrate, a sodium hydroxide solution and a sodium bicarbonate solution into a lauryl sodium sulfate solution, mixing and aging, and then carrying out a post-treatment process. The HPVC power cable protection tube prepared by the invention has relatively high strength, good mechanical properties, weather resistance and cold resistance, and long service life.

The invention discloses a polyvinyl chloride high impact modifier and a preparation method thereof, and belongs to the field of polymer compound compositions. The raw materials of the polyvinyl chloride high impact modifier include a modified cyclodextrin core and a shell material, and the mass ratio of the two is 6.5-7.5:4. The impact modifier of the invention can effectively improve the impact resistance of polyvinyl chloride materials at low temperatures. According to the method in GB / T1043.1-2008, the impact strength of the sample at 0°C, -20°C, and -40°C is tested, and the impact strength at 0°C is 45.5-46.3KJ / m 2 The impact strength at ‑20°C is 39.8‑41.3KJ / m 2 The impact strength at ‑40°C is 33.6‑35.5KJ / m 2 .

Disclosed herein are systems and methods for removing trichloroethane (TCA), trichloroethene (TCE), and 1,4-dioxane (1,4-D) from contaminated liquids. The system and methods rely on catalyst reduction of TCA and TCE, where the reduced products are then degraded by microorganisms The system comprises a first reactor comprising a catalyst film of precious metal nanoparticles deposited on a first nonporous membrane and a second reactor comprising a biofilm of microorganisms that are capable of degrading ethane and 1,4-D deposited on a second nonporous membrane. The first reactor further comprises a hydrogen gas source, wherein the hydrogen gas source delivers hydrogen to the gas-phase side of the first nonporous membrane, and the catalyst film is deposited on the liquid-phase side. The second reactor further comprises an oxygen gas source, wherein the oxygen gas source delivers oxygen to the gas-phase side of the second non-porous membrane, and the biofilm is deposited on the liquid-phase side.

The invention relates to the technical field of rubber-plastic composite flame-retardant materials, and provides a graphite rubber-plastic composite flame-retardant material and a preparation method thereof.The preparation method comprises the following processes that nitrile rubber, polyvinyl chloride, dioctyl phthalate, modified expandable graphite, a stabilizer, sulfur and an anti-aging agent are added into a high-speed mixer and mixed to be uniform, and a premix is obtained; and feeding the premix into a double-screw extruder, and carrying out melt blending, extrusion and vulcanization to obtain the composite flame-retardant material. The preparation method has the beneficial effects that the modifier is combined with the expansible graphite and compounded with the nitrile rubber, the polyvinyl chloride and other base materials, so that the flame retardant property and the mechanical property of the prepared composite material are remarkably improved.

This invention relates to a method for using a low-content ruthenium-based catalyst modified with nitrogen and oxygen ligands in the hydrochlorination of acetylene. The invention utilizes 2-pyridine carboxylate as a ligand, commercial activated carbon as a support, trace amounts of ruthenium as the main active component, and water as a solvent. An improved synthesis procedure yields a low-content ruthenium-based catalyst with ruthenium ions coordinated by a modifier and commercial activated carbon as a support, significantly improving catalyst performance while reducing ruthenium content. This catalyst exhibits high activity and vinyl chloride selectivity in the fixed-bed hydrochlorination of acetylene to vinyl chloride, and its low cost makes it highly valuable for industrial applications. The ruthenium loading is 0.1%, and the reaction gas space velocity is 170 h⁻¹. ‑1 V (C2H2) / V (HCl) With a ratio of 1:1.05 and a reaction temperature of 180℃, the acetylene conversion rate can reach 84.3%, the vinyl chloride selectivity is greater than 99%, and the activity remains basically unchanged within 10 hours.

The invention discloses a catalytic combustion catalyst for treating CVOCs (Chemical Volatile Organic Compounds) as well as a preparation method and application of the catalytic combustion catalyst. The preparation method comprises the following steps: (1) impregnating and loading cerous nitrate and trimethyl phosphate on a carrier, drying, and roasting at 600-800 DEG C to form a modified carrier containing a cerous phosphate crystal phase; and (2) impregnating and loading active metal ruthenium on the modified carrier, drying and roasting to obtain the catalyst for treating catalytic combustion of the CVOCs. The catalyst provided by the invention can be used for catalytic combustion degradation of CVOCs such as dichloromethane, chlorobenzene, chloroethylene, dichloroethane, dichloroethylene, oxychloropropane and the like. For catalytic combustion degradation of CVOCs, the catalyst disclosed by the invention can show high activity, high chlorine-resistant stability, low polychlorinated by-product selectivity and thermal stability, and has certain industrial application prospects.

Provided is a printing ink composition capable of forming a printed layer having excellent non-slip properties, blocking resistance and heat resistance. [Solution] A printing ink composition containing a binder resin (A), urethane resin beads (B), and an organic solvent (C), wherein the binder resin (A) contains at least two types selected from the group consisting of polyurethane resins, vinyl chloride-vinyl acetate copolymers, and (meth)acrylic resins, the urethane resin beads (B) have an average particle size of 1.5 to 16 μm and a glass transition temperature of -20 to 25°C, and the ratio expressed as the mass of the urethane resin beads (B) / the mass of the binder resin (A) converted into solid content is 0.1 to 1.5.

The invention belongs to the technical field of polyvinyl chloride plastic processing, particularly relates to polyvinyl chloride plastic processing equipment and a polyvinyl chloride plastic processing method, and provides the following scheme aiming at the problem that the existing polyvinyl chloride plastic processing equipment cannot accurately control the adding amount of a stabilizer: the polyvinyl chloride plastic processing equipment comprises a barrel body, and the outer part of the barrel body is fixedly connected with a support frame; a top cover is fixedly connected to the upper side of the barrel, a rectangular opening is formed in the top cover, a feeding hopper is fixedly connected into the rectangular opening, a round hole is formed in the top cover, a weighing box is fixedly connected into the round hole, and a quantitative adding module is arranged on the weighing box. According to the polyvinyl chloride plastic processing equipment and method disclosed by the invention, the amount of a stabilizer added into the powder can be effectively controlled according to the amount of the polyvinyl chloride powder in the barrel, and excessive addition of the stabilizer is avoided while the production quality of polyvinyl chloride plastics is ensured, so that the production cost is controlled.

The invention discloses an environment-friendly macromolecular modifier PVC (polyvinyl chloride) composition, and belongs to the technical field of polyvinyl chloride materials. The composition comprises the following components in parts by weight: 100 parts of PVC, 1-50 parts of a polycarbonate toughening modifier and 0-30 parts of an auxiliary agent. The polycarbonate toughening modifier with a certain polymerization degree is used as the modifier of the PVC material, the plasticity, toughness, impact resistance and other properties of PVC can be obviously improved, the polycarbonate toughening modifier is a macromolecular polymer and cannot be separated out in the use process, the safety of the PVC material is improved, and the service life of the PVC material is prolonged.

The invention provides an anti-aging medium and low voltage polyvinyl chloride cable, which comprises an outer layer insulation skin, sealing rubber sleeves are glued on two sides of the outer layer insulation skin, a protection assembly is arranged on the inner wall of the outer layer insulation skin, the protection assembly comprises a separation rubber sheet, the separation rubber sheet is arranged on the inner wall of the outer layer insulation skin, and the separation rubber sheet is arranged on the inner wall of the outer layer insulation skin. A liquid bin is reserved between the two sets of separation films, the liquid bin is filled with a sodium silicate solution, a separation sleeve is arranged on the inner wall of the outer layer insulation skin, a liquid layer is embedded in the separation sleeve, and a repairing assembly is embedded in the liquid layer. When the outer insulating layer is damaged by external force, the isolation triggering protective layer is accurately broken to release aluminum oxide powder and a sodium silicate solution, the aluminum oxide powder and the sodium silicate solution are mixed and then rapidly react to generate a high-insulation and high-strength aluminosilicate hardened body, and sealing and leaking stoppage, structural reinforcement and flame retardance enhancement of a damaged part are synchronously achieved; and self-repairing can be completed without manual intervention.

The invention relates to the technical field of packaging materials, and discloses a high-barrier multilayer co-extrusion composite film which sequentially comprises an inner layer, a first bonding layer, a first barrier layer, a second bonding layer, a second barrier layer, a third bonding layer and an outer layer from bottom to top. And the second barrier layer is a nano silicon dioxide modified polyvinyl alcohol layer. The two different barrier layers are arranged, the first barrier layer has a good barrier effect on gas, the second barrier layer has outstanding barrier performance on water vapor, and the two barrier layers have a synergistic effect, so that the comprehensive barrier performance of the composite film on oxygen, water vapor, peculiar smell and the like is remarkably improved, the shelf life of a packaged product can be effectively prolonged, and the packaging cost is reduced. According to the high-barrier film, the high-barrier property is ensured, the quality and the performance of a product are ensured, and the use of expensive materials and a complex production process is avoided and the production cost is reduced by reasonably selecting each layer of material and optimizing the structural design on the premise of ensuring the high-barrier property.

The utility model discloses a silane cross-linked polyvinyl chloride flame-retardant cable, which comprises a cable core, three annularly distributed wire cores are arranged inside the cable core, a composite shielding layer is wrapped outside the cable core, and the composite shielding layer is composed of a conductive layer, an insulation isolation layer and a protection layer. The outer portion of the composite shielding layer is wrapped by a composite flame-retardant layer, the composite flame-retardant layer is composed of a base layer, a heat isolation layer and a reinforcing layer, the outer portion of the composite flame-retardant layer is wrapped by a composite protection layer, and the composite protection layer is composed of an inner protection layer, a waterproof layer, a sheath layer and an anti-ultraviolet layer. The problem that the insulation performance is reduced due to the fact that the insulation material is softened when the cable is in a high-temperature environment for a long time is solved.

The invention discloses an SPC synchronous mould pressing floor and a production process. The SPC synchronous mould pressing floor is formed by compounding a UV layer, a wear-resistant layer, a color film layer and an SPC base material layer. Wherein the SPC base material layer is prepared from the following components: stone powder, composite pretreated polyvinyl chloride resin, a calcium-zinc stabilizer, a lubricant and a flexibilizer; the SPC synchronous molded floor prepared by the invention has excellent mechanical properties and relatively high dimensional stability. The composite pretreated polyvinyl chloride resin is introduced, so that the comprehensive performance of the SPC synchronous molded floor is greatly improved, and particularly, the dimensional stability is obviously improved. In the preparation process of the composite pretreated polyvinyl chloride resin, nanosheets are introduced, the nanosheets have high thermal stability and thermal conductivity, the overall thermal stability of the SPC synchronous molded floor can be improved to a certain extent, and the SPC synchronous molded floor can keep good structural stability in a high-temperature environment; and the buckling deformation caused by thermal expansion is greatly reduced.

The invention provides a calcium sulfate whisker reinforced and toughened polyvinyl chloride pipe and a preparation method thereof, and belongs to the technical field of polyvinyl chloride pipes. The plastic comprises the following components in parts by mass: 100 parts of polyvinyl chloride resin, 5-15 parts of calcium sulfate whiskers, 0.5-3 parts of a coupling agent, 2-4 parts of a heat stabilizer, 0.5-1.5 parts of a lubricant and 1-3 parts of a processing aid, wherein the adding amount of the calcium sulfate whiskers is 5-15% of the mass of the polyvinyl chloride resin. The coupling agent is used for treating the calcium sulfate crystal whiskers, so that the treated calcium sulfate crystal whiskers can be infiltrated by the polyvinyl chloride matrix, and a good interface layer is formed between the calcium sulfate crystal whiskers and the polyvinyl chloride matrix; the calcium sulfate whisker treated by the silane coupling agent can play a role of a filling agent and impact resistance, replaces calcium carbonate, achieves a filling effect, can improve the strength, hardness, dimensional stability and heat resistance of the pipe, and can reduce the production cost due to the fact that the calcium sulfate whisker is a low-price environment-friendly material.

The invention discloses a preparation method of a polyvinylidene fluoride-based polymer piezoelectric film, which comprises the following steps: S1, adding a poly (vinylidene fluoride-trifluoroethylene-chlorofluoroethylene) terpolymer and a poly (vinylidene fluoride-trifluoroethylene) binary copolymer into a solvent, and uniformly mixing to obtain a mixed solution; and S2, drying the mixed solution obtained in the step S1 to obtain a polymer blend membrane, and performing combination and treatment on the blend membrane to obtain a membrane sample. The preparation method comprises the following steps: carrying out solution blending on a poly (vinylidene fluoride-trifluoroethylene-chlorofluoroethylene) terpolymer and a poly (vinylidene fluoride-trifluoroethylene) biopolymer as raw materials, controlling the mixing ratio of the two polymers, and carrying out post-treatment matching combination to prepare the polyvinylidene fluoride-based polymer piezoelectric film with high piezoelectric property.

The application discloses a kind of cable filling rope with halogen-free flame-retardant composite material and preparation method thereof, belong to composite material technical field.The application is used to solve the technical problems of poor cell quality, poor mechanical properties and flame-retardant properties of filling rope material in the prior art.A kind of preparation method of cable filling rope with halogen-free flame-retardant composite material includes the following steps: low-density polyethylene, high-density polyethylene, hybrid flame-retardant resin and modified nucleating agent are uniformly mixed to obtain foaming filling rope material;Foaming filling rope material is melt extruded to obtain cable filling rope with halogen-free flame-retardant composite material.The hybrid flame-retardant resin is obtained by reaction of polycyclic epoxy group cyclotriphosphazene, vinyl chloride methyl methacrylate copolymer, mixed inorganic powder, etc.;The modified nucleating agent is obtained by intercalating talc powder with modified diamide nucleating agent.The foaming filling rope material prepared by the application has the characteristics of high cell quality, excellent mechanical properties and flame-retardant properties.

The invention discloses a rigid polyvinyl chloride pipe and a preparation method thereof, and relates to the technical field of materials. The rigid polyvinyl chloride pipe comprises the following raw material components in parts by weight: 80-90 parts of polyvinyl chloride with an ultrahigh polymerization degree; 10 to 20 parts of polyvinyl chloride with ultralow polymerization degree; 2 to 4 parts of nano boehmite; 4-5 parts of a stabilizer; 8-12 parts of a plasticizer; 0.6 to 1.2 parts of a lubricant; 15 to 25 parts of a filling agent; 3-5 parts of nuclear titanium dioxide; the polymerization degree of the polyvinyl chloride with the ultrahigh polymerization degree is 1500 to 1800; the polymerization degree of the polyvinyl chloride with the ultralow polymerization degree is 600 to 800. The rigid polyvinyl chloride tube disclosed by the invention has excellent processability, thermal stability, impact resistance, flame retardance, insulating property and surface glossiness.

The invention discloses a purity analysis method for crude vinyl chloride in a conversion process, which comprises the following steps: after sampling, carrying out qualitative and quantitative analysis on small molecule components in the crude vinyl chloride, then analyzing acetylene and high-boiling residues in the crude vinyl chloride, and calculating the purity of the crude vinyl chloride according to a deduction method. Compared with the prior art, the aluminum foil sampling bag is adopted for sampling, so that the problem of poor sample representativeness is solved; the content of the high-boiling residues in the crude vinyl chloride can be accurately analyzed by adopting gas chromatography, so that the accuracy and precision of analysis data are improved; according to the method, gas chromatography is adopted to completely replace a dichloroethane absorption method, so that the working intensity of workers is reduced, and the method has the effects of safety, environmental protection and low energy consumption.

To provide a canvas for industrial materials, which has excellent balance of tear strength in the warp and weft directions, excellent bending durability (flutter resistance), especially excellent bending durability below freezing point and durability of joints under the blazing sun, and has a good appearance, and a manufacturing method thereof. [Solution] A canvas having a soft polyvinyl chloride resin-impregnated coating layer provided on the entire surface of the fabric, the fabric being woven from a group of warp threads and a group of weft threads, with multifilament yarns and staple spun yarns regularly alternately arranged in both the warp and weft thread groups, the alternating arrangement having 2 to 6 repeat units, and either one of a combination of multifilament yarns (1 to 3 threads) and staple spun yarns (1 to 3 threads), and the soft polyvinyl chloride resin-impregnated coating layer containing a cured liquid rubber.

The invention discloses a method for synthesizing a dichloroacetyl compound, which comprises the following steps: tetrachloroethylene and an acid are subjected to an addition reaction at 100-200 DEG C to obtain an adduct, then the adduct is subjected to an acidolysis, hydrolysis or alcoholysis reaction to obtain the dichloroacetyl compound, the acid for the addition reaction is at least one of sulfuric acid, trifluoromethanesulfonic acid, methanesulfonic acid and phosphoric acid, and the acid for the alcoholysis reaction is at least one of sulfuric acid, trifluoromethanesulfonic acid, methanesulfonic acid and phosphoric acid. The molar ratio of the tetrachloroethylene to the acid is 1: (1-10). By controlling the types of acids and increasing the temperature of the addition reaction, the addition reaction of tetrachloroethylene and acids in the absence of a catalyst is realized. Double bonds of tetrachloroethylene and hydrogen protons are subjected to an addition reaction in a strong acid environment to form a cationic intermediate, then the cationic intermediate is combined with acid radical anions to form an adduct, and the adduct intermediate is high in activity, unstable and free of separation and can be directly subjected to a hydrolysis reaction, an acidolysis reaction or an alcoholysis reaction with another substrate (such as water, acid or alcohol) respectively. The synthesis of dichloroacetyl series compounds is realized, and the route has universality and diversity.

The invention is applicable to the technical field of decorative films, and provides a high-weather-resistance decorative film and a processing system, the high-weather-resistance decorative film comprises a first polyvinyl chloride base film, a thermoplastic resin layer and a second polyvinyl chloride base film; an ink layer is printed on the surface of the first polyvinyl chloride base film; according to the decorative film, the ink layer is printed on the surface of the first polyvinyl chloride base film, so that the simulation texture of the decorative film is improved, and the variety of materials suitable for covering and pasting is widened; through the arrangement of the net-shaped woven reinforcing layer, the deformation resistance of the decorative film is improved, the bottom face of the second polyvinyl chloride base film is coated with the polyurethane resin chemical separation layer, and when a roll product is opened, the front face and the back face of the decorative film do not adhere to each other; through linkage cooperation of all the components, synchronous hot-press gluing operation of the upper film part, the thermoplastic resin layer and the lower film part is achieved, and the operation procedure is optimized.