12 results about "Vinylidine chloride" patented technology

The invention provides a light photovoltaic module with heat insulation and noise reduction functions and a preparation method thereof, and relates to the technical field of photovoltaic modules. The light photovoltaic module structure comprises a front plate, a packaging layer, a photovoltaic battery piece, a micro-cavity composite layer and a back plate, the microcavity composite layer comprises the following components: aerogel particles, polymer foaming microspheres and a thermosetting resin matrix; the porosity of the aerogel particles is 85%-99%, and the particle size of the polymer foaming microspheres is 3-30 [mu] m; the polymer foaming microspheres are thermoplastic polymer microspheres and are selected from at least one of polymethyl methacrylate, polyacrylonitrile and polyvinylidene chloride. According to the light-heat-sound multifunctional integrated light photovoltaic module and the preparation method thereof, the defects that an existing light photovoltaic module is single in function and cannot meet the heat insulation and sound insulation requirements of a building envelope structure are overcome, and the light-heat-sound multifunctional integrated light photovoltaic module integrating the power generation function, the heat insulation function and the noise reduction function and the preparation method of the light-heat-sound multifunctional integrated light photovoltaic module are provided.

In one aspect, the disclosure relates to a method for supplementing syngas to produce a precursor composition for synthesis of at least one industrially useful chemical, the method comprising contacting the syngas with an external source of hydrogen. In an aspect, industrially useful chemical comprises methanol and the external source of hydrogen comprises hydrogen produced by steam methane reforming (SMR), hydrogen produced by steam injected onto molten metals, or another hydrogen source. In some aspects, the external source of hydrogen comprises hydrogen produced by a halogen acid contacting scrap metal, wherein the halogen acid can be produced by gasifying a halogen-containing polymer such as, for example, polyvinylchloride (PVC), polyvinylidene chloride (PVDC), or any combination thereof. Also disclosed herein are systems useful for carrying out the disclosed methods.

The invention belongs to the technical field of numerical control valves, and discloses a numerical control machining method for a polyvinylidene chloride soft sealing valve. The numerical control machining method comprises the steps that (1) three-dimensional scanning data of the surface of a rubber ring is obtained, a high-resolution point cloud model is generated, geometric parameters of local folds and a high-curvature area are extracted according to non-uniform curvature features, and initial surface feature distribution is obtained; (2) according to the initial surface feature distribution, generating a multi-scale grid structure by adopting a self-adaptive grid division algorithm, increasing the grid density in a complex area to cover wrinkles and high-curvature parts, reducing the density in a flat area to reduce the calculated amount, and determining an initial point location layout; and (3) spraying polyvinylidene chloride on the rubber ring according to the point position layout obtained in the step (2). The soft sealing valve has the advantage that the performance bottleneck problem of a traditional soft sealing valve in a high-temperature environment is solved.

This invention relates to an aramid rope conveyor belt and its preparation method, belonging to the field of conveyor belt manufacturing technology. The aramid rope conveyor belt, by mass fraction, comprises: a composite coating, an aramid rope core layer, and an elastic buffer layer; the aramid rope core layer comprises modified aramid fibers; the elastic buffer layer, by mass fraction, comprises high-saturation nitrile rubber, carbon black, peroxide, and plasticizer; the composite coating, by mass fraction, comprises, from the outside to the inside, a hydrophobic wear-resistant layer, a barrier layer, and a filler layer; the hydrophobic wear-resistant layer comprises modified polyurethane, nano-ZnO, zinc stearate, titanate coupling agent, and defoamer; the barrier layer comprises fluororubber, polyvinylidene chloride, and nano-montmorillonite; and the filler layer comprises polytetrafluoroethylene nano-dispersion, nano-graphene, and silane coupling agent. The aramid rope conveyor belt of this invention can adapt to high-humidity and high-salt-spray environments such as ports, extending the service life of the conveyor belt.

The invention relates to the field of foam adhesive tapes, in particular to a thermal visbreaking PE foam adhesive tape and a preparation method thereof. Comprising a body, and the body is sequentially provided with a first release layer, a high-viscosity glue layer, a PE foam layer, a thermal reduction glue layer and a release layer from the upper surface to the lower surface. The heat reducing adhesive layer is prepared by coating and curing a reducing adhesive liquid obtained by mixing a prepolymer B, thermal expansion microspheres, an isocyanate cross-linking agent and a solvent; a shell of the thermal expansion microsphere is a vinylidene chloride-acrylonitrile copolymer, and an inner core of the thermal expansion microsphere is a heating expansion agent; the prepolymer B is prepared from the following raw materials in percentage by weight: 70 to 80 parts of 2-ethylhexyl acrylate, 10 to 15 parts of ethyl acrylate, 3 to 8 parts of methacrylic acid, 1 to 3 parts of N-vinyl pyrrolidone, 0.4 to 0.6 part of benzoyl peroxide, 0.2 to 0.4 part of a chain transfer agent and 70 to 90 parts of a solvent. The thermal visbreaking PE foam adhesive tape has the advantages of being capable of being detached again, low in residual adhesive rate and the like.

The invention discloses a stacking plastic bucket with high sealing performance and a preparation method thereof, and belongs to the technical field of high polymer materials, the preparation method comprises the following steps: adding a compatilizer into an alpha-olefin ethylene copolymer, mixing, adding polyvinylidene chloride powder, nano montmorillonite and talcum powder, and mixing to obtain a mixture; mixing dicumyl peroxide and triallyl isocyanurate, and spraying the mixture to the surface of the mixture for mixing; adding the pigment and the composite antioxidant; extruding to obtain a barrel blank master batch; performing injection cooling to obtain a barrel blank; and dipping and draining. The binding performance of the alpha-olefin ethylene copolymer, polyvinylidene chloride and other raw materials is optimized by preparing the compatilizer, the binding tightness between the raw materials is greatly improved, medium permeation channels are effectively reduced, a uniform and compact sealing layer is formed on the barrel opening in cooperation with the two-stage impregnation process and the compound emulsifier, meanwhile, the barrel cover is made of differentiated raw material proportions, and the service life of the barrel cover is prolonged. And the overall sealing performance and the medium infiltration resistance of the plastic barrel are cooperatively improved.

A method of reducing hydrogen sulfide emissions from an asphalt or bitumen composition comprises releasing a solid hydrogen sulfide scavenger from an additive package, which comprises the solid hydrogen sulfide scavenger disposed in a sealed pouch; and contacting the asphalt or bitumen composition with the released solid hydrogen sulfide scavenger. The sealed pouch is formed from a pouch material, which includes an polyethylene, a polypropylene, an ethylene propylene copolymer, a polystyrene, a polylactic acid, a polyamide, a polyester, a polystyrene, an ethylene vinyl acetate copolymer, an ethylene vinyl alcohol copolymer, a polyvinylpyrrolidone, an ethylene vinylpyrrolidone copolymer, a vinylpyrrolidone vinyl acetate copolymer, a polyvinyl acetate, a polyvinyl alcohol, a polyethylene oxide, a polyethylene glycol, polyvinylidene chloride, a polysaccharide or its derivative, or a combination comprising at least one of the foregoing.

The invention discloses a modified polymerization process for recycling a PVDC recycled material, belongs to the technical field of polyvinylidene chloride recycling, and aims to solve the problems that the performance of the PVDC recycled material is insufficient, and the recycled PVDC recycled material cannot meet the requirement of an industrial packaging material after being recycled. The process comprises the steps of reclaimed material pretreatment, physical and chemical modification, secondary polymerization and post-treatment of a polymerization product. According to the invention, through physical and chemical synergistic modification and gradient compatibilization polymerization technologies, the value of modification and reutilization of the reclaimed material is significantly improved. The performance defect of the recycled material is compensated by utilizing the reaction activity of a proper amount of added new monomer, the performance of the final product is regulated and controlled, the effect that the recycled material partially replaces the original material for industrial packaging is finally achieved, and the highest ratio of the recycled material replacing the original material can reach 20%; in actual production, the value of each ton of recycled materials can be increased by 60%, the emission amount of CO2 can be reduced by 1.2 tons, and the emission amount of HCl can be reduced by 90%.

A ceramicized composite material, its preparation method, and its application, comprising, by weight: 100 parts of silicone rubber matrix; 50-120 parts of ceramic-forming filler system; 10-40 parts of active fire extinguishing microcapsules; 5-20 parts of sacrificial template agent; and 2-10 parts of synergistic additives. The ceramic-forming filler system, by weight, comprises: 30-60 parts of synthetic fluorophlogopite powder; 15-40 parts of low-melting-point glass powder; and 5-20 parts of reinforcing skeleton filler. The core material of the active fire extinguishing microcapsules is perfluorohexanone; the wall material of the active fire extinguishing microcapsules has a double-layer structure, with an inner layer of melamine resin and an outer layer of polyurea or silica grafted with vinyl groups. The sacrificial template agent is a core-shell structured thermoplastic expandable microsphere, with a core material of liquid alkane and a shell material of a copolymer of vinylidene chloride, acrylonitrile, and methyl methacrylate; the expansion temperature of the sacrificial template agent is 180°C-220°C, and its pyrolysis temperature is 300°C-400°C. This invention has the advantages of active flame suppression, ultra-low thermal conductivity, and robust structure.

The present invention discloses a high-barrier aluminum-free cooking-resistant PET film and its preparation method and application, belonging to the technical field of packaging films. The PET film includes a substrate and a coating on the surface of the substrate, a glue layer is arranged between the coating and the substrate, and the coating is formed by coating the cooking-resistant polyvinylidene chloride latex obtained by modification on the surface of the glue layer and drying; the cooking-resistant polyvinylidene chloride latex includes the following raw materials: vinylidene chloride, ethylene-vinyl alcohol copolymer, acrylonitrile, isocyanate, acrylamide, modified inorganic filler, initiator, softened water and slip agent; the modified inorganic filler is an oxide wrapped by epoxy phenolic resin, and the oxide includes aluminum oxide, silicon dioxide and zirconium oxide according to the mass ratio (3-5): (8-10): 1. The PET film prepared by the present invention not only has excellent cooking resistance and high barrier performance, but also has good mechanical strength.

The invention provides an enteric capsule and a preparation method thereof, the capsule takes modified chitosan derivatives, such as quaternized chitosan and phthalic anhydride grafted copolymer, as main materials, and cooperates with polyvinylidene chloride-maleic anhydride copolymer, nano silicon dioxide-sodium alginate composite particles, a plasticizer and a stabilizer in a specific ratio to prepare the enteric capsule. The enteric system is constructed by optimizing the proportion. The thickness of a capsule shell is 80-120 microns, the inner wall of the capsule is of a 50-200 nm nano-microporous structure, multifunctional composite particles are prepared through a reversed-phase microemulsion method, and the microporous structure is regulated and controlled through a sol-gel method. According to the design, the drug stability and the targeted release efficiency are remarkably improved, and the drug carrier has good mechanical strength and pH sensitivity, can effectively cover bad properties of drugs, is suitable for controlled release carriers of various enteric drugs, and has industrial production potential.

The present invention relates to the field of thermal transfer technology, and in particular, to a thermal sublimation retransfer film for glass substrates. The thermal sublimation retransfer film comprises a substrate, a primer layer and a dye receiving layer; the components of the dye receiving layer include a first main resin and a first auxiliary resin; the first main resin is one of halogenated resins such as polyvinyl chloride, polyvinylidene chloride, and vinyl chloride-vinyl acetate copolymer; the first auxiliary resin is one or more of thermoplastic polyurethane resin, acrylic resin, and acrylic modified resin. The thermal sublimation retransfer film can ensure high color concentration when used for thermal sublimation soft label printing, and can also directly thermally transfer patterns to the surface of an untreated glass substrate.