160 results about "Carvacryl acetate" patented technology

This invention relates to a release film for an oxide solid electrolyte membrane, the release film comprising a release substrate layer and an EVA functionalized coating coated on the surface of the release substrate layer, wherein the vinyl acetate content of the EVA functionalized coating is between 10% and 50%. Furthermore, this invention also provides an oxide solid electrolyte membrane comprising a release film, an oxide solid electrolyte membrane body, and a carrier as described above, wherein the oxide solid electrolyte membrane body is located between the release film and the carrier, and the release film is bonded to the oxide solid electrolyte membrane body via the EVA functionalized coating.

The present invention provides a solid dispersion of compound 1 or a pharmaceutical salt thereof, comprising the compound 1 or the pharmaceutical salt thereof as an active ingredient and a carrier material, wherein the carrier material is selected from one, two, or more of polyvinylpyrrolidone (PVP), copovidone, polyvinylpyrrolidone-vinyl acetate copolymer, hydroxypropyl methylcellulose acetate succinate, polyvinyl caprolactam-polyvinyl acetate-polyethylene glycol graft copolymer, hydroxypropyl methylcellulose, polyethylene glycol, and ethyl cellulose, enabling the drug to have good stability, dissolution, and therapeutic effects. The formulation of the present invention provides rapid drug release and can reduce the oral burden of large-dose tablets on menopausal patients, thereby improving treatment compliance and treatment efficiency.

This invention discloses a method for preparing a three-dimensional integrated lumbar support cushion. The raw materials of the lumbar support cushion include: ethylene-vinyl acetate copolymer, polyether-type thermoplastic polyurethane elastomer, physically foamed microspheres, azodicarbonamide, caprolactam-blocked 4,4'-diphenylmethane diisocyanate, surface-modified copper nanowires, and silver-loaded silicone composite components. The preparation process is as follows: the matrix resin and modified copper nanowires are melt-blended at high temperature, and then mixed with the foaming system, crosslinking agent, and composite components at low temperature to obtain a blended base material; the blended base material is injection molded, followed by static differential temperature field for pressure holding and curing, and finally cooled and demolded. This invention utilizes copper nanowires to construct a thermally conductive network, which, combined with the external temperature difference, forms a continuous foaming ratio and crosslinking density gradient inside, eliminating the physical phase interface of traditional multi-material splicing, significantly improving the tear resistance and fatigue life of the transition zone; and utilizes cooling phase separation to form an anti-slip and antibacterial skin layer.

This invention relates to the field of photovoltaic encapsulation materials technology, specifically providing a rare-earth upconversion light-trapping photovoltaic film, its preparation method, and a photovoltaic module, aiming to solve the problems of existing technologies being unable to simultaneously address interface reflection loss and low UCNP utilization. To this end, the rare-earth upconversion light-trapping photovoltaic film of this invention includes a surface layer, an intermediate layer, and an inner layer; the surface layer comprises an ethylene-vinyl acetate copolymer (EVA) matrix and upconversion nanomaterials UCNPs dispersed therein; the intermediate layer is a polyolefin elastomer (POE) matrix; the inner layer comprises an ethylene-vinyl acetate copolymer (EVA) matrix and spherical diffusing agents dispersed therein; wherein the refractive indices of the surface layer, intermediate layer, and inner layer satisfy the following condition: the refractive index of the surface layer ≤ the refractive index of the intermediate layer < the refractive index of the inner layer. The rare-earth upconversion light-trapping photovoltaic film of this invention can simultaneously solve the problems of interface reflection loss and low UCNP utilization.

The application discloses a kind of corrosion-resistant double-armored submarine cable and preparation method thereof, it is related to submarine cable technical field.The corrosion-resistant double-armored submarine cable includes outer sheath layer, water barrier layer, double-armored layer, insulating inner liner, filling layer, insulating layer, copper conductor in turn from surface to inside;The outer sheath layer is obtained by extruding coating on the surface of double-armored layer by corrosion-resistant submarine cable material;The corrosion-resistant submarine cable material includes the following raw material components: by mass parts, 75-90 parts of high-density polyethylene, 30-50 parts of ultra-high molecular weight polyethylene, 10-25 parts of modified microfiber, 8-15 parts of ethylene-vinyl acetate copolymer, 0.2-0.5 parts of antioxidant, 1-1.2 parts of lubricant.The application optimizes sheath layer material, solves the problems of existing double-armored submarine cable corrosion failure, short service life, unstable performance and other problems, meets the demand of long-term service reliability.

This invention provides an equivalent substitute, its preparation method, and its application for testing the mechanical properties of RDX-based non-aluminum-containing press-loaded explosives under temperature load. The equivalent substitute is prepared by replacing the energetic material RDX in the RDX-based non-aluminum-containing press-loaded explosive formulation with the non-energetic material ammonium sulfate. The equivalent substitute is used to replace the actual explosive for testing its mechanical properties under temperature load. The equivalent substitute, by mass percentage, comprises the following raw material components: 95.5%–96.5% ammonium sulfate, 2%–3% polyvinyl acetate, and 0.5%–1.5% stearic acid, with the total mass percentage of the above components being 100%. The mechanical properties of the molded explosive charge made with the equivalent substitute provided by this invention, such as compressive strength and tensile strength (compressive strength of 2.9-27.3 MPa and tensile strength of 1.1-5.9 MPa at -55 to 70°C), are basically consistent with those of real explosives under different temperature loads. This can truly reflect the changes in the mechanical properties of the actual explosive charge during environmental and aging tests, and can provide data support for the mechanical failure assessment of explosives.

To provide a protective tape with high peel strength and / or low surface impedance. [Solution] The protective tape comprises a base film, an antistatic layer, and an adhesive layer. The antistatic layer is located on the surface of the base film and contains a first resin. The adhesive layer is located on the antistatic layer. Here, the adhesive layer contains a second resin, and the second resin is grafted with 6% to 12% by weight of glycidyl methacrylate and 3% to 5% by weight of vinyl acetate relative to the total weight of the second resin.

The application relates to a fruit and vegetable packaging film based on a MOF material, which comprises the following components: polyvinyl alcohol, modified polylactic acid, Ag@MOF nanoparticles, plant extract, glycerol, and a solvent; wherein the modified polylactic acid is obtained by reaction of acrylamide, double-bond polylactic acid, vinyl acetate and KH570 modified nano-silver particles. Through the synergistic effect of the modified polylactic acid and components such as polyvinyl alcohol, Ag@MOF nanoparticles and plant extract, the mechanical properties, compatibility, antibacterial property, barrier property and preservation performance of the packaging film are significantly improved, the degradability of the material is ensured, and the application has important significance for promoting the development of the fruit and vegetable preservation packaging industry.

This invention discloses a flame-retardant rubber and its preparation method. The flame-retardant rubber, by weight, comprises: 45-65 parts of ethylene-vinyl acetate copolymer; 12-20 parts of ethylene propylene diene monomer (EPDM) rubber; 3-6 parts of maleic anhydride-grafted ethylene-vinyl acetate copolymer; 8-12 parts of phosphorus-modified nanocellulose; 2-5 parts of submicron zinc borate; 2-4 parts of melamine polyphosphate; 0.5-2.5 parts of graphene; 1-2.5 parts of phosphorus-containing flame-retardant plasticizer; and 1-4 parts of multifunctional acrylate crosslinking agent. This application replaces traditional melamine with melamine polyphosphate (MPP). MPP has higher thermal stability, its decomposition temperature matches the char formation window of P-NC more closely, and it has its own phosphorus source, enabling a complementary and continuous phosphoric acid supply with P-NC on both the time and temperature axes, thus solving the problem of insufficient phosphorus catalysis after reducing the amount of P-NC alone.

The application belongs to the technical field of precision casting, and particularly relates to a high-viscosity and high-strength precision casting adhesive wax and a preparation method thereof. The adhesive wax comprises the following components: 30-40 parts of paraffin wax, 16-24 parts of microcrystalline wax, 25-30 parts of petroleum resin, 8-14 parts of rosin resin, 5-10 parts of EVA, 2-5 parts of LDPE and 0.1-2 parts of additives; wherein the LDPE is composed of two kinds of LDPE with different melt indexes. By introducing the petroleum resin, rosin resin, ethylene-vinyl acetate copolymer (EVA) and low-density polyethylene (LDPE) into the paraffin wax and microcrystalline wax base system, and controlling the proportion between the resin system and the polyolefin reinforcing system, the adhesive wax has high viscosity and hardness at 100 DEG C, and the bending strength is improved. Thus, the comprehensive performance of the adhesive wax is achieved, i.e., the adhesive wax is not easy to sag at high temperature, is not easy to be pressed at room temperature, and is not easy to crack under stress.

The application discloses a low-smoke halogen-free insulating material and a preparation method and application thereof, and relates to the field of cable materials. The low-smoke halogen-free insulating material comprises ethylene-vinyl acetate copolymer, polyethylene, modified flame retardant, polydopamine-coated ceramic oxide, antioxidant, crosslinking agent and processing aid, and the modified flame retardant is a flame retardant treated by bis(dioctyloxyphosphato) ethylene titanate. The application uses the modified flame retardant with low filling amount and the polydopamine-coated ceramic oxide to synergistically improve the flame-retardant and smoke-suppressing performance of the insulating material. The modified flame retardant is decomposed to generate oxides under heat to form an oxygen-blocking dense physical barrier. The polydopamine-coated oxides are heated to form a tough and stable heat-insulating ceramic-carbon composite layer. The modified flame retardant with low filling amount improves the compatibility and processing performance of the matrix, and comprehensively improves the flame retardation and mechanical strength of the material.

This utility model relates to electrical engineering, specifically to autonomous power sources based on lithium-polymer (Li-Po) cells. It can be used in portable electronic devices, power tools, robotic systems, unmanned aerial vehicles, and other equipment requiring a stable, high-capacity DC power source. The technical result of this utility model is increased mechanical strength and operational safety.A lithium-polymer High Voltage battery for portable use comprises a housing made of heat-shrinkable tube, in which batteries are placed, fixed together with polypropylene adhesive tape to form a battery pack, the terminals of which are connected to a printed circuit board, to which a balancing and power cable are connected, while adhesive tape is glued to the current-carrying parts of the printed circuit board, followed by the application of gaskets made of ethylene vinyl acetate and electrical cardboard, which are fixed with reinforced adhesive tape, and the battery pack consists of lithium-polymer batteries with a capacity of 4300-4500 mAh and a voltage of 22.8 V. 1 fig.

This invention belongs to the technical field of laminated glass encapsulation materials and discloses a high-impact-resistant glass adhesive film. The film is a five-layer co-extruded composite structure, sequentially comprising a first ethylene-vinyl acetate copolymer (EVA) resin layer, a first polar transition layer, a polyvinyl alcohol acetal resin layer, a second polar transition layer, and a second ethylene-vinyl acetate copolymer resin layer. Its core lies in the selection of materials to ensure that the surface free energy of the first and second polar transition layers is between the two EVA resin layers and the middle polyvinyl alcohol acetal resin layer, forming a precise surface free energy gradient. This design effectively releases interlayer stress, fundamentally solving long-term reliability problems such as easy debonding, delamination, and plasticizer migration at the interface when composite materials of different polarities are combined. Simultaneously, this structure possesses excellent wide-temperature-range impact resistance, high glass adhesion, low water vapor transmittance, and good optical performance, meeting the application requirements of high-end laminated glass in fields such as construction, automotive, and rail transportation.

The application provides a water-soluble breathable skin protection film composition and a preparation method and application thereof, relates to the technical field of skin care products and functional coating, and the water-soluble breathable skin protection film composition contains the following components in percentage of total weight: (a) 5-30% of a film-forming polymer component, the film-forming polymer component is a combination of polyvinylpyrrolidone / vinyl acetate copolymer and partially alcoholized polyvinyl alcohol; (b) 5-25% of C2-C4 lower alcohol and / or C2-C10 aliphatic diol; (c) 0.01-10% of a polyether-modified silicone surfactant; (d) 0.01-18% of a functional auxiliary agent; (e) the balance is water. The composition can form a breathable film with a water vapor transmission rate greater than 500 g / (m 2 ·24h) on the skin, which can be removed within 90 seconds by using 25-30 DEG C normal temperature water. When used in medical treatment, the composition does not contain lower alcohol and has no irritation to damaged skin.

The present invention relates to a low-loss encapsulant sheet for a photovoltaic module and a photovoltaic module including same. The present invention may provide an encapsulant sheet for a solar cell module, the encapsulant sheet comprising ethylene vinyl acetate (EVA), wherein the thickness of the sheet is 300-700 µm, the melt index (MI) of the EVA is 10-30, and the degree of pre-cure is 1-99%.

The application relates to the cable technical field and discloses a 35kV aging-resistant power cable which comprises, from inside to outside, a conductor, a conductor shielding layer, an insulation layer and a sheath layer; the raw material of the sheath layer comprises the following components in parts by weight: 100 parts of chlorinated polyethylene, 15-20 parts of chlorosulfonated polyethylene material, 7-12 parts of ethylene-vinyl acetate copolymer, 10-15 parts of ethylene-propylene-diene rubber, 10-15 parts of filler, 0.2-0.4 parts of vulcanizing agent, 2-3 parts of activator and 5-8 parts of compatibilizer; the raw material of the chlorosulfonated polyethylene material comprises the following components in parts by weight: 60 parts of chlorosulfonated polyethylene, 5-10 parts of zeolite, 5-10 parts of illite and 0.5-2.5 parts of rare earth stearate. Through the technical scheme, the problem that the aging resistance of the sheath layer of the power cable needs to be improved in the related art is solved.

This invention discloses a flame-retardant and anti-aging cable composite material and its preparation method, belonging to the field of cable material preparation technology. In this invention, a flame-retardant, high-temperature resistant polysiloxane containing double bonds, an anti-aging agent, and a flame-retardant filler are prepared and blended with raw materials such as EVA and low-density polyethylene. Irradiation causes cross-linking between the materials, endowing the composite material with heat resistance, aging resistance, and good mechanical properties. The anti-aging agent of this invention includes siloxane groups and benzophenone groups, possessing good resistance to both UV aging and heat aging, which is beneficial for further improving the anti-aging performance of the prepared cable composite material. The flame-retardant filler of this invention has urethane bonds grafted onto its surface, which matches the polarity of the EVA vinyl acetate segments, improving the compatibility between the flame-retardant filler and EVA, and further enhancing the flame retardancy of the prepared composite cable material.

This invention discloses a method for preparing an ethylene-vinyl acetate copolymer foam material, comprising the following steps: (1) Tea stem pretreatment: The tea stems are pretreated using a physical-chemical pretreatment method. The tea stems are pulverized to 100-300 mesh using a pulverizer. The tea stem powder is then added to a NaOH aqueous solution, allowed to stand, and washed with pure water until pH=7 to remove residual NaOH. The powder is then added to an VTMO aqueous solution, heated and stirred, filtered, and dried to obtain modified tea stem powder for later use; (2) Intensive mixing; (3) Thin-pass milling; (4) Foaming. This invention uses a physical-chemical dual pretreatment method to modify the tea stems, which effectively improves the interfacial compatibility between biomass fibers and the EVA / POE polymer matrix, avoids problems such as fiber agglomeration and uneven cell size during foaming, and ensures the uniformity and stability of the foam structure.

A fire-retardant coating is characterized by comprising the following components in weight percentage: 10-30% vinyl acetate-ethylene copolymer (VAE) emulsion, 10-30% modified urea-formaldehyde resin, 5-20% expandable vermiculite, 10-30% coating additives and other fillers, 10-30% intumescent flame retardant, and 5-30% water; wherein the modified urea-formaldehyde resin is obtained by chemically coating melamine-modified urea-formaldehyde resin with polyacrylate. This fire-retardant coating not only exhibits good expansion properties and excellent fire resistance, but also possesses good water resistance.

The application discloses acetoacetamide modified polyvinyl alcohol and a preparation method thereof, and the preparation method comprises the following steps: reacting p-ester and an acetoacetamide reagent at 20-80 DEG C for 1-3h in a polar solvent to generate N-acetoacetyl p-ester; then, the N-acetoacetyl p-ester is mixed with an alkaline catalyst and polyvinyl alcohol, and is added into a double-screw reaction extruder to generate N-acetoacetyl p-ester modified polyvinyl alcohol crude product; finally, the crude product is powdered, washed with methanol for three times to remove the catalyst and reaction inorganic salt, and is filtered and dried to obtain the N-acetoacetyl p-ester modified polyvinyl alcohol. The AAE-PVA prepared by the application can be used as a protective colloid for polyvinyl acetate emulsion polymerization, has better water resistance than common polyvinyl alcohol, and the water resistance, tensile strength and stability of the prepared emulsion adhesive are obviously improved. The synthesis steps of the application are simple, the safety risk is low, and the reaction yield is high.

This invention relates to the field of cable technology, specifically to a cross-linked polyethylene cable sheath material and its preparation method. The sheath material comprises linear low-density polyethylene resin, polyolefin elastomer, ethylene-vinyl acetate copolymer, dual-reactive-site grafted polyethylene masterbatch, encapsulated magnesium hydroxide flame retardant, reactive plasticizer / flame retardant monomer, and antioxidant, etc. By encapsulating the flame retardant with an interface anchoring agent and combining it with the dual-reactive-site grafted masterbatch, the compatibility between the inorganic filler and the resin matrix is ​​significantly improved. The sheath material prepared by this method possesses excellent flame retardancy, low smoke density, oil swelling resistance, mechanical properties, and stable electrical insulation, effectively solving the problem of performance degradation of traditional materials under harsh working conditions.

The application belongs to the technical field of adhesives and sealants, and specifically provides a sealing wax as well as a preparation method and application thereof. The sealing wax comprises the following components in parts by mass: microcrystalline wax 40-60 parts, polyethylene wax 1-5 parts, ethylene-vinyl acetate copolymer 3-8 parts, low-molecular-weight polyisobutylene 2-5 parts, medium-molecular-weight polyisobutylene 2-5 parts, tackifying resin 15-20 parts, and flame retardant 3-5 parts. The number-average molecular weight of the low-molecular-weight polyisobutylene is less than 5000, and the viscosity-average molecular weight of the medium-molecular-weight polyisobutylene is 10000-40000. Through the design and mutual compounding of the components, the sealing wax has a high melting point, a low water absorption rate, a high volume resistivity, good high-temperature and low-temperature resistance, and strong waterproof and moisture-proof performance, high mechanical strength and toughness, high insulation, high transparency, and strong sealing effect, and has good flow leveling property and good flame retardant performance, and can meet the strict use requirements of high-end electronic equipment.

This invention provides a textile fabric with a TPE coating and its preparation method, comprising a base fabric coated with a TPE coating. The raw materials for preparing the TPE coating, by weight, include: 45-55 parts polyethylene, 27-33 parts ethylene-vinyl acetate copolymer, 8-12 parts elastomer, 8-12 parts hot melt adhesive, 2-5 parts reactive nanocellulose whiskers, 1-3 parts functionalized graphene oxide, and 1.0-2.2 parts processing stabilizer. The TPE coating of this invention uses polyethylene as a matrix, exhibiting excellent film-forming properties and chemical stability, good compatibility of components, flexibility and excellent elastic recovery, high adhesion and mechanical strength, and combining barrier, waterproof, and weather-resistant properties. It bonds firmly to the textile fabric, enhancing the overall performance of the textile fabric.

This invention discloses an ethylene alcohol-vinyl acetate-medium-long alkyl carboxylic acid vinyl ester copolymer and its preparation method, belonging to the technical field of preparation of copolymers containing ethylene alcohol structural units. The copolymer has a number average molecular weight of 5,000 to 500,000 and is composed of ethylene alcohol-based structural units (a), vinyl acetate-based structural units (b), and medium-long alkyl carboxylic acid vinyl ester-based structural units (c). The preparation method provided by this invention has mild reaction conditions, simple operation, and is easy to industrialize.

The application provides a self-adhesive marking tape and a preparation method thereof, and steps of the method comprise the following steps: S1, performing corona discharge pretreatment on a paper base material in a roll shape to make a surface tension coefficient greater than or equal to 38; S2, preparing a water-based adhesive, wherein the water-based adhesive comprises ethylene-vinyl acetate copolymer, polyvinyl alcohol and deionized water; and S3, coating the water-based adhesive on one side of the pretreated paper base material by using a gravure coating method, and drying the coated paper base material through an oven to obtain a semi-finished product with a glue curing layer. By using the water-based adhesive containing ethylene-vinyl acetate copolymer and polyvinyl alcohol, performing corona pretreatment on the paper base material in the adhesive and using a segmented gradient drying process, the self-adhesive strength and use reliability of the self-adhesive marking tape are significantly improved on the basis of keeping zero residue and high cleanliness.

The application provides a high-slip hot-melt road marking paint composition containing ceramic particles and relates to the technical field of materials, which is prepared from the following raw materials in mass parts: petroleum resin 18-22 parts, plasticizer 4-7 parts, polyethylene wax 1-2 parts, ethylene-vinyl acetate copolymer 2-5 parts, filler 25-35 parts, hollow glass microbead 8-12 parts, ceramic particle 15-22 parts, thixotropic agent 3.1-5.5 parts, silane coupling agent 0.3-0.5 parts, antioxidant 0.1-0.3 parts and pigment 5-8 parts. Through the synergistic effect of ternary thixotropic compound of hydrogenated castor oil-polyamide wax micro powder-fumed silica, hollow glass microbead density reduction and ceramic particle surface modification, the comprehensive performance of the hot-melt marking paint is significantly improved. The high-density large-particle-size ceramic particles are effectively inhibited from settling in the hot-melt state, and the balance between slip resistance, durability and workability is achieved.

An article is described comprising a first film layer comprising polylactic acid polymer (semicrystalline polylactic acid polymer; amorphous polylactic acid polymer; or a mixture thereof); a second (e.g. polyvinyl acetate) polymer having a Tg of at least 25° C.; plasticizer. In some embodiment, the film layer further comprises inorganic pigment and / or hydrolysis stabilizer. In other embodiments, the film has a net melting endotherm, ΔHnm1, of less than 10 J / g. Also described are methods of making a graphic film.

This invention belongs to the field of polymer material synthesis technology, specifically relating to a core-shell vinyl acetate emulsion for interior walls and its preparation method. Addressing the problems of insufficient scrub resistance and low efficiency in introducing functional monomers in existing vinyl acetate emulsions, the following solution is provided: A pre-emulsion A is obtained by emulsifying deionized water, a composite emulsifier, and a pH buffer with a core-layer mixed monomer mixture. The core-layer mixed monomer mixture includes vinyl acetate, vinyl tert-carbonate, C1-C4 alkyl esters of (meth)acrylate, a carboxylic acid functional monomer containing double bonds, diacetone acrylamide, and organosilicon-modified monomers. After seed emulsion preparation and core-layer polymerization, a shell-layer monomer mixture B (containing phosphate-based adhesion-promoting monomers, hydroxyalkyl esters, and vinyl acetate) is introduced for shell-layer polymerization. Post-treatment yields the emulsion. The emulsion possesses a hard core-functionalized soft shell structure, and the resulting interior wall coating can withstand over 8000 scrub cycles, far exceeding the national standard for superior products. Furthermore, the emulsion exhibits excellent storage stability.