247 results about "Polycarbonic acid" patented technology

The invention relates to a composition of a high-tenacity full-biodegradable film and a preparation method thereof. The film is prepared from polylactic acid (PLA), poly propylene carbonate (PPC), polybutylene adipate terephthalate (PBAT) and a heat stabilizer. Blending modification sections are prepared by adopting a twin-screw extruder, blow molding is carried out by adopting a single-screw extruder, the prepared film has excellent tenacity and full biodegradable performance, and meanwhile the cost is low, so that the film is an ideal substitute for a current non-degradable film packing material.

A curable epoxy resin composition including at least an epoxy resin component and a hardener component, and optionally further additives, wherein: (a) the epoxy resin component is an epoxy resin compound or a mixture of such compounds; (b) the hardener component includes (b1) an aliphatic and cycloaliphatic or aromatic polycarbonic acid anhydride; and (b2) a polyether-amine of the general formula (I), H₂N—(C_nH_2n—O)_m—C_nH_2n—NH₂, wherein n is an integer from 2 to 8; and m is from about 3 to about 100; (c) the polycarbonic acid anhydride [component (b1)] is present in the curable epoxy resin composition in a concentration of 0.60 Mol to 0.93 Mol; and (d) the polyether-amine of the general formula (I) [component (b2)] is present in the curable epoxy resin composition in a concentration of about 0.02 Mol to about 0.1 Mol.

The invention discloses an irradiation resistant non-halogen low smoke flame-retardant sheathing material applied to nuclear power stations and a preparation method. The raw materials comprises ethane-vinyl acetate rubber, maleic anhydride stem grafting ethane-vinyl acetate rubber, magnesium hydroxide fire retardant, organic silicon fire retardant, nano cerium oxide, FEF, zinc stearate, stearic acid, vinyl trisilane, Aflux A-16, Aflux A-25, polycarbonate diimine(PCD-50), 2, 2, 4-trimethyl-1, 2-dihydride quinoline, antiager DDA, di-tert-butyl peroxide cumene, triene propylcyanide uric acid ester and decanedioic acid dioctyl, which are heated and mixed to obtain the materials of the invention. The invention features scientific and reasonable formula and proportion, and the process is advanced. The sheathing material features fine irradiation resistance, excellent mechanical properties and long service life, thus being a good irradiation resistant non-halogen low smoke and flame-retardant sheathing material applied to nuclear power stations.

Chemically protected dihydroxyacetone and/or dimers are used to make polycarbonates, poly(acetal carbonate)s, poly(spiroacetal)s, polyesters and polyurethanes.

The invention discloses a preparation method and application of high-solid-content water-based polyurethane resin and coating thereof. The preparation method comprises the following steps: reacting poly (propylene carbonate) polyols or a mixture of poly (propylene carbonate) polyols and other conventional polypolyols with isocyanate, a chain extender, a crosslinking agent, a catalyst and a sulfonic acid type hydrophilic chain extender, adding water to perform emulsification, and removing a solvent to obtain the high-solid-content water-based polyurethane resin; adding aids such as a leveling agent, a thickening agent, color paste, an environment-friendly cosolvent and a defoaming agent to obtain high-solid-content water-based polyurethane resin coating prepared from the poly(propylene carbonate)polyols. Film-forming and drying speed is high, plumpness is high, and high adhesive force, hardness, water resistance and solvent resistance are achieved.

The invention discloses a composite solid-state electrolyte membrane, a preparation method and a solid-state lithium battery. The composite solid-state electrolyte membrane comprises a support membrane, an organic-inorganic composite coating A coated on the surface of the positive electrode side of the support membrane, and an organic-inorganic composite coating B coated on the surface of the negative electrode side of the support membrane, wherein the coating A comprises an organic polymer A, a lithium salt and a nano inorganic solid electrolyte, and the organic polymer A is one or more thantwo of polyvinylidene fluoride, a polyvinylidene fluoride copolymer, polyacrylonitrile and polyvinyl chloride; the coating B comprises an organic polymer B, a lithium salt and a nano inorganic solid electrolyte; and the organic polymer B is one or more than two of polyoxyethylene, polypropylene carbonate, polycarbonate and poly trimethylene carbonate. Aiming at different requirements of positive and negative electrode layers in the solid-state lithium battery on the electrolyte membranes, the graphene oxide membrane is used as a support, and the electrolyte membranes containing different polymer groups are designed on the two sides of the graphene oxide membrane respectively so that the comprehensive performance of the battery is further improved.

The invention relates to a biodegradable material and a preparation method thereof. The biodegradable material comprises, by weight, 50-75 parts of poly(butyleneadipate-co-terephthalate), 25-50 parts of polypropylene carbonate, 2-8 parts of inorganic filler, 1-5 parts of plasticizers and 0.5-1 part of nucleating agents, wherein the inorganic filler is selected from at least one of montmorillonite, talcum powder, mica and nano-Al2O3. The biodegradable material is capable of blocking off water vapor effectively.

The invention discloses a biodegradable polylactic acid agricultural mulching film and a processing technology thereof, and relates to the technical field of agricultural mulching films. The biodegradable polylactic acid agricultural mulching film is prepared from the following raw materials in parts by weight: 100-120 parts of polylactic resin, 15-30 parts of light calcium carbonate, 5-10 parts of polypropylene carbonate, 5-10 parts of carboxymethyl-beta-cyclodextrin, 1-5 parts of PEG-60 hydrogenated castor oil, 1-5 parts of hexakis(methoxymethyl)melamine, 1-5 parts of ultraviolet screening agent and 0.5-2 parts of antioxidant. According to the biodegradable polylactic acid agricultural mulching film and the processing technology thereof, the polylactic acid film is prepared by taking thepolylactic resin as a main material and co-taking a plurality of auxiliary materials, and the prepared polylactic acid film belongs to the biodegradable film and is non-toxic, harmless and strong inuse environmental protection property; and in addition, the usability is excellent, and the use requirement of the agricultural mulching film is met.

The invention relates to the field of composite materials, and provides a biodegradable polyester/cellulose composite film blowing material and a preparation method thereof, aiming at the problems ofpoor starch plasticizing effect, low material comprehensive performance and the like. According to a technical scheme, the material is prepared from the following raw materials in parts by weight: 35to 50 parts of poly(butylene adipate-co-terephthalate) (PBAT), 10 to 15 parts of polypropylene carbonate polyol (PPC), 0.01 to 0.03 part of a chain extender, 8 to 15 parts of polylactic acid (PLA), 25to 35 parts of starch, 20 to 25 parts of cellulose, 2 to 5 parts of a compatilizer, 1 to 3 parts of a stabilizer and 1 to 3 parts of an anti-aging agent. The material is simple in formula, good in compatibility and good in mechanical property, the plasticity and strength of the composite material are improved, the degradation property is excellent, and the environment is not polluted.

The invention provides an LCP film for FPC industry and a preparation method thereof. The film is prepared from liquid crystal monomers shown as a formula I and a formula II. The preparation method comprises the following steps: pouring the liquid crystal monomers shown as the formula I and the formula II, a photoinitiator and an ultraviolet absorbent into a liquid crystal box, and inducing polymerization and exposure under ultraviolet light with the intensity of 2 mW/cm<2> and the wavelength of 365 nm at 95 DEG C for 30 min to obtain a liquid crystal polymer; dissolving the liquid crystal polymer in an organic solvent, sequentially adding polycarbonate resin, temperature-resistant Teflon resin and epoxy resin, stirring and mixing uniformly, transferring an obtained reaction liquid to a twin-screw extruder for extrusion granulation, and finally preparing dried particles into the LCP film according to a casting technology. The LCP film has low dielectric constant at high frequency, hasincreased signal transmission speed, and can be widely applied to 5G network.

The invention provides a full-biodegradable balloon bottom support and a preparation method. The bottom support is prepared through extrusion and injection molding from the following materials: 70-90parts by mass of polylactic acid, 5-30 parts by mass of a toughening agent, 0-20 parts by mass of a filler, 0.1-2 parts by mass of a lubricant, and 0.1-1 part by mass of a compatibilizer, wherein thetoughening agent is selected from one or more of poly(butyleneadipate-co-terephthalate), polycaprolactone, polyhydroxyalkanoate, polypropylene carbonate, an acrylate degradable polymer and a maleic anhydride grafted degradable polymer, and the compatilizer is selected from one or more of a silane coupling agent, an aluminate substance and a titanate substance. The bottom support component not onlymeets the use requirements of the balloon bottom support, but also can realize complete biodegradation. Meanwhile, the process is simple, the cost is low, and the market competitiveness of the product is stronger.

The invention discloses a multifunctional membrane coating liquid suitable for ink-jet and laser printing, and a preparation method thereof. The preparation method comprises following steps: firstly,isophorone diisocyanate and a polycarbonate diol are subjected to polymerization, an appropriate amount of a hydroxyl acrylate is added, chain propagation, neutralization, and emulsification are carried out so as to obtain a primarily modified aqueous polyurethane; polyvinyl alcohol solutions with different functions are prepared, and a mixed dispersion solution of silica and alumina is prepared,and at last, mixing with auxiliary agents such as a wetting agent, an anti-foaming agent, a thickening agent, and an antistatic agent is carried out so as to obtain the multifunctional membrane coating liquid suitable for ink-jet and laser printing. The preparation method is low in preparation cost and excellent in printing effect; the production technology is simple; the multifunctional membranecoating liquid is convenient for coating; the solid content is as high as 35%; the multifunctional membrane coating liquid is suitable for coating of a plurality of polyester or polyolefin membranes such as PET, PVC, and PETG membranes, and can be used for production of coated products with different functions.

The invention discloses a flexible drinking water barrel and relates to a container for food drinking water. The supporting force and stability of a barrel body are improved through a triangular `WM`-shaped thin wall structure, the flexibility of the barrel and the times of repeated use of bottled water are determined by the thickness of the barrel wall and the physical and chemical properties of the material, the barrel extends during water filling and automatically shrinks in the water drinking process, air inside and outside the barrel is not exchanged, the difficult problem of secondary pollution during water drinking is radically solved, a barrel opening is combined with a barrel cover through non-return threads, the defect that the barrel opening is difficult to seal through the gland manner under the conditions of large diameter and inconsistent sizes is solved, a support rib is arranged on the exterior of a barrel neck and is supported on a slightly-modified filling equipment diversion rail for filling production, the selection range of the barrel body on plastics is more extensive, the defect that polycarbonate (PC) and polyethylene glycol terephthalate (PET) are easily decomposed to generate harmful substances to the human body under high temperature or direct sunlight, the barrel can be formed more easily through injection, stretching and blow-molding, the barrel can be transported and stored after being compressed, consumers have no need to change a water dispenser, and the water drinking is truly safe and reliable.

Disclosed herein is a superabsorbent polymer with a surface modified with both a water-soluble polyvalent cationic salt and a polycarbonic acid-based copolymer, wherein an improvement is brought about in processability without significant degradation of other properties and a method is provided for preparing the surface-modified superabsorbent polymer.

The invention discloses rust-proof paint. The rust-proof paint comprises the following components in parts by weight: 75-80 parts of acrylic emulsion, 20-30 parts of iron red, 5-10 parts of polycarbonate, 10-15 parts of inositol hexaphosphate, 1-3 parts of aluminum dihydrogen tripolyphosphate, 0.5-2 parts of iron phosphating agent, 0.02-1 part of silicon dioxide and 100 parts of water. Compared with the ordinary water-based rust-proof paint, the rust-proof paint provided by the invention has a better rust-proof effect, has a very strong color fixing effect, still does not lose the color and luster after being affected by high temperature and harsh environment for a long time under, and is low in cost.

The invention provides a preparation method of strippable waterborne polyurethane resin and application thereof in coating. The preparation method comprises the following steps: uniformly stirring andmixing 10-40 parts of polypropylene carbonate polyol, 20-40 parts of isocyanate and 0.5-6 parts of a hydrophilic agent, and then adding 0.1-0.2 part of a catalyst to obtain a mixed solution A; adding1-5 parts of a chain extender and 20-70 parts of acetone into the mixed solution A obtained in the step 1 to obtain a mixed solution B; cooling the mixed solution B in the step 2 to 35-60 DEG C, adding 0.3-3 parts of triethylamine, adding deionized water, emulsifying the mixture at a high speed, and stirring the mixture for 10-20 minutes to obtain an emulsion; and 4, placing the emulsion obtainedin step 3 on a rotary evaporator, carrying out vacuum pressure reduction concentrating, and removing the solvent to obtain the strippable waterborne polyurethane resin. The resin is mixed with pullulan and the like to obtain the coating. The waterborne strippable coating has biodegradability, does not pollute the environment, can reduce the investment of manpower and financial resources, and hasmore obvious environmental protection advantages compared with traditional films and other strippable resins.

The invention provides a device and a method for continuously synthesizing poly (propylene carbonate) polyols (PPC). The device comprises a duplex injection reactor and a scraper film evaporator. Circular reaction is carried out with the duplex injection reactor; when the reaction is finished, a liquid phase product is delivered to the scraper film evaporator from the bottom of the duplex injection reactor; vacuuming and heating treatments are carried out, and PPC is collected from the bottom. According to the invention, the duplex injection reactor is applied, such that gas-liquid mass transfer rate is improved, gas-liquid mixing degree is improved, and reaction rate is improved. Also, the invention provides a continuous production process, such that purposes of reducing investment and production energy consumption, improving productivity and conversion rate, realizing continuous production, and improving production efficiency are achieved.

The invention relates to a method for synthesizing high molecular weight polycarbonate, a catalyst and application in the technical field of polymer synthesis. The method comprises that diphenyl carbonate and dihydric alcohol as raw materials undergo a one-step melt transesterification polycondensation reaction to produce high molecular weight polycarbonate. The method can be widely used for aliphatic polycarbonate, aromatic polycarbonate, isosorbide-based polycarbonate and tricyclodecane dimethanol-based polycarbonate. After the transesterification polycondensation reaction, the catalyst canbe used as an inorganic filler directly residual in the polymer without separation and subsequent treatment. The catalyst is selected from a metal oxide and/or a metal-aluminum complex oxide and the metal is at least one of alkaline earth metals and zinc. Compared with the existing homogeneous catalyst systems such as a titanium group, a transition metal salt and a strong base, the catalyst used by the method has the advantages of simple preparation processes, low toxicity, good polymer color and no use of a catalyst in the separation process.

Disclosed herein is a superabsorbent polymer with a surface modified with both a polyvalent cationic salt and a polycarbonic acid-based copolymer, which is able to effectively absorb blood or highly viscous liquid, and a method for preparing the same.

The invention relates to the technical field of plastic bags, and particularly discloses a degradable environment-friendly plastic bag and a preparation method thereof. The degradable environment-friendly plastic bag is prepared from the following raw materials in parts by weight: 20-30 parts of poly(alkylene succinate), 15-20 parts of polylactic acid, 10-15 parts of polypropylene carbonate, 5-10parts of modified silicon dioxide, 5-10 parts of tetrapod-like zinc oxide whisker, 4-7 parts of graphene oxide, 3-5 parts of filler, 2-5 parts of plasticizer, 1-3 parts of lubricant, 3-4 parts of dispersing agent, 6-8 parts of kaolin, 3-6 parts of nano titanium dioxide, 1-2 parts of ultraviolet light absorber, 0.5-2 part of chlorinated paraffin and 1-2 parts of stabilizer. The preparation method comprises the steps of material mixing, granulation, film blowing, printing and slitting, and the plastic bag is prepared. The degradable environment-friendly plastic bag prepared by the preparation method disclosed by the invention not only has a good degradation effect, but also has excellent mechanical properties.

The invention relates to an ultralow-temperature-resistant environment-friendly two-component polyurethane adhesive and preparation and application thereof. The ultralow-temperature-resistant environment-friendly two-component polyurethane adhesive is prepared by mixing and blending a component A and a component B. The component A is an isocyanate-terminated polyurethane prepolymer, and the isocyanate group content of the component A is 40-70%; and the component B comprises polypropylene carbonate polyol, a polytetrahydrofuran polyol modifier, vegetable oil polyol, a cross-linking agent, a catalyst, a latent curing agent, an adhesion promoter, a filler and a thixotropic agent. The ultralow-temperature-resistant environment-friendly two-component polyurethane adhesive is applied to adhesionof polyurethane foam and glass fiber reinforced plastic of a heat insulation box body for an LNG ship and is high in curing speed, high in peel strength, excellent in ultralow temperature resistanceand hydrolysis resistance and more environment-friendly.

The invention relates to the exsolution, centrifugation and drying integrated technology in the industrial production of poly propylene carbonate, which belongs to the technical field of the synthesis of the industrial production of the poly propylene carbonate and the post treatment of the product. The technology comprises: injecting the poly propylene carbonate slurry continuously into a sealed elevated tank by a slurry pump; entering a centrifuge after leaving the elevated tank; putting the slurry continuously into the centrifuge to be centrifugalized to ensure that the moisture content (weight) of the wet material is less than 50 percent; putting the wet material coming out of the centrifuge into a horizontal drier to be dried for 1-6 hours and putting mother liquor into a mother liquor tank; putting the solids with less than 1 percent of moisture content (weight) coming out of the horizontal drier continually into a vertical drier to be dried for 1-4 hours to ensure the moisture content (weight) is less than 0.2 percent after drying; obtaining the ultimate solid which is the finished product of the poly propylene carbonate; and condensing and recovering the fugitive constituents to be led into the mother liquor tank. The technology of the invention has the advantages of complete sealed entire process, complete liquid constituent recovery, continuous technological process, smooth and integrated design, simple equipment and low production and labor cost, which is particularly suitable for industrial production.