2459 results about "Phthalic anhydride" patented technology

Polyimide copolymers were obtained containing 1,3-bis(3-aminophenoxy)benzene (APB) and other diamines and dianhydrides and terminating with the appropriate amount of reactive endcapper. The reactive endcappers studied include but should not be limited to 4-phenylethynyl phthalic anhydride (PEPA), 3-aminophenoxy-4'-phenylethynylbenzophenone (3-APEB), maleic anhydride (MA) and nadic anhydride (5-norbornene-2,3-dicarboxylic anhydride, NA). Homopolymers containing only other diamines and dianhydrides which are not processable under conditions described previously can be made processable by incorporating various amounts of APB, depending on the chemical structures of the diamines and dianhydrides used. By simply changing the ratio of APB to the other diamine in the polyimide backbone, a material with a unique combination of solubility, Tg, Tm, melt viscosity, toughness and elevated temperature mechanical properties can be prepared. The copolymers that result from using APB to enhance processability have a unique combination of properties that include low pressure processing (200 psi and below), long term melt stability (several hours at 300 DEG C. for the phenylethynyl terminated polymers), high toughness, improved solvent resistance, improved adhesive properties, and improved composite mechanical properties. These copolyimides are eminently suitable as adhesives, composite matrices, moldings, films and coatings.

The invention discloses a preparation method of a biodegradable carbon dioxide-based polyester-polycarbonate terpolymer. A commercialized, simple and efficient nonmetal triethyl boron/tetra-n-butyl ammonium chloride catalytic initiation system is used for catalyzing and initiating epoxypropane, carbon dioxide and phthalic anhydride to be subjected to a ternary polymerization reaction, and an aromatic polyester structure with the content of 10%-40% is successfully introduced into a main chain of polymethyl ethylene carbonate (PPC). The terpolymer can have different sequence structures; and haverandom and block structures and the like, the glass transition temperature and the thermal stability of PPC are improved, and a catalytic system does not contain metal components, so that the phthalic anhydride modified PPC has extremely high light transmittance, very high melt viscosity and good foaming performance on the premise of keeping the biodegradability of a PPC material. The method canbe used for synthesizing the modified PPC biodegradable material, and widens the application range of the PPC material.

The invention discloses a high-temperature lithium ion battery electrolyte and a lithium ion battery. The electrolyte is prepared by uniformly mixing electrolyte salts, a nonaqueous organic solvent, a high-temperature film-forming additive and high-temperature gas generation inhibiting additives, wherein the high-temperature film-forming additive is lithium bis(oxalate) borate (LiBOB); the LiBOB accounts for 0.2-3% by mass of the mixed lithium salt solution formed by the electrolyte salts and the nonaqueous organic solvent; the high-temperature gas generation inhibiting additive is one or twoof ionic liquid and phthalic anhydride, and accounts for 0.8-9% by mass of the mixed lithium salt solution; and the total content of the added high-temperature film-forming additive and high-temperature gas generation inhibiting additives accounts for 1-11% by mass of the mixed lithium salt solution. The lithium ion battery comprises a cathode, an anode, a diaphragm and the high-temperature lithium ion battery electrolyte. The invention has the advantage of reasonable design, the steps in the preparation processes are simple and convenient to implement, and the prepared electrolyte and the lithium ion battery have excellent comprehensive performance.

The invention discloses a preparation method of butylphthalide, which comprises the following steps: taking phthalic anhydride as a raw material; enabling the phthalic anhydride to carry out addition reaction with the Grignard reagent of butyl halide to obtain an intermediate of o-valeryl benzoic acid; and then, reducing by sodium borohydride, and carrying out acidic cyclization to obtain the butylphthalide. The phthalic anhydride and the butyl halide which are used as raw materials in the preparation method of the butylphthalide of the invention are commercial products, and the reaction raw materials can be obtained easily. Because the Grignard reaction, the sodium borohydride reduction and the acidic cyclization are classical reactions, the operation is simple, the industrialized production can be realized easily, the yield of the butylphthalide reaches 50-60%, and the purity of the butylphthalide reaches 97-98%.

The present invention relates to a H-grade low-temp. direct-welding enamelled wire enamel, said enamel liquor mainly includes three portions of hydroxyl component, closed type isocyanate component and solvent. The hydroxyl component is formed from raw materials of dihydric alcohol terephthate or amidoimide dihydric alcohol, new pentanediol or 2-methyl-1,3-propanedio, glycerine, 1,1,1-trihydroxymethyl propane, tri(alpha-hydroxyethyl) isocyanate, adipic acid and phthalic anhydride. The acid value of polyester polybasic alcohol is less than 2, hydroxy value is 70-250, number-average molecular weight is 2000-7000 and molecualr weight distribution index is 2-3. The isocyanate component is made up by using general raw material TDI and MDI through the processes of cyclic self-polymerization or addition with small quantity of tribasic alcohol and closing with dimethyl phenol.

The invention discloses polyurethane resin, a preparation method thereof and application thereof to a micro cellular elastomer. The polyurethane resin comprises a polyurethane resin component A and a polyurethane resin component B; the polyurethane resin component A and the polyurethane resin component B comprise polyether ester polyol; a ratio of a mole number of active hydrogen in the component A to a mole number of -NCO in the component B is 1:1. The polyether ester polyol is a reaction product of polyether polyol, phthalic anhydride, a double-metal cyanide complex catalyst, epoxypropane, ethylene oxide and a basic catalyst. According to the polyurethane resin and the preparation method and the application thereof, which are disclosed by the invention, under the condition of not adding an open-hole agent and graft polymer polyol, the polyurethane micro cellular elastomer with a low forming density, a high hardness, low shrinkage, high tensile strength and tearing strength, excellent hydrolysis resistance and excellent wear resistance can be prepared, and not only hydrolysis resistance and a forming hardness of the polyurethane micro cellular elastomer are improved, but also the open taphole of the polyurethane micro cellular elastomer is improved, so that cells of the polyurethane micro cellular elastomer are fine and uniform, and shrinkage is low.

The invention relates to a method for preparing a terylene environmental protection type dyeing carrier, which comprises the following steps: (1) alkylamine, dimethylformamide, phthalic anhydride and triethylamine are added into a three-neck flask with the volume of 500mL under the condition of ice bath and are subject to thermal insulation reaction for one hour; then the temperature is increased to 120 DEG C to perform a reflux reaction for four hours; the mixture is dumped into ice water after the reaction is finished; and white crystals are precipitated; (2) according to the mass proportion of 4 to 1, a carrier precursor is added into an emulsifying agent, heated and stirred; and (3) the process formulation is a dispersion dye, 1 to 3 percent owf of carrier, and 0.3g to 0.5g.L<-1> of glacial acetic acid; the bath ratio is 1 to 20; the dyeing temperature is between 85 and 100 DEG C; the thermal insulation time is between 60 and 100 minutes; and the dyeing carrier is washed and aired. The method is suitable for terylene boiling dyeing processes of dyeing and finishing plants, can reduce production cost, and shorten dyeing period. The textile after the dyeing has bright color, pure chromatic light, high brightness, no toxicity, no smell, and low COD value, so the dyeing carrier is an environment-frinedly green auxiliary.

The invention relates to a preparation method of alkyd resin. The preparation method comprises the following specific steps: (1) adding neopentyl glycol, trihydroxymethyl propane, phthalic anhydride, hydrogenated phthalic anhydride and antioxidant to a reaction container, and heating to carry out melt esterification on the materials at the temperature of 200-240 DEG C; (2) when esterification is carried out to an acid value being 40-45 mgKOH/g, cooling to 120-160 DEG C, and adding short-chain synthetic fatty acid and an aliphatic hydrocarbon solvent; (3) heating to carry out reflux esterification at the temperature of 180-200 DEG C, and diluting with acetic acid ester organic solvent when the acid value is smaller than or equal to 8 mgKOH/g; and (4) cooling to 100 DEG C and filtering to obtain alkyd resin. The paint prepared from the alkyd resin obtained in the invention and nitrocellulose has the characteristics of rapid drying, high hardness, good fullness, good adhesion force, and good water resistance.

The invention discloses an acrylic acid ester modified epoxy soybean oil, its preparation method and an application thereof. According to the preparation method of the acrylic acid ester modified epoxy soybean oil, acrylate monomer bearing a hydroxyl group reacts with acid anhydride to obtain a half-ester intermediate, and the half-ester intermediate reacts with epoxy soybean oil to obtain the acrylic acid ester modified epoxy soybean oil. The acrylate monomer bearing a hydroxyl group is hydroxyethyl acrylate, hydroxyethyl methacrylate, pentaerythritol triarylate, hydroxypropyl acrylate, hydroxypropyl methacrylate, trimethylol propane diacrylate or trimethylol propane dimethacrylate. Acid anhydride is o phthalic anhydride, succinic anhydride, methyl hexahydrophthalicanhydride, hexahydrophthalic anhydride or tetrahydrophthalic anhydride. The acrylic acid ester modified epoxy soybean oil has a novel structure. When applied in paper printing ink, the acrylic acid ester modified epoxy soybean oil can improve adhesive force of a cured film and also can improve wetability of pigments and remarkably minimize occurrence of misting. The preparation method helps widen the application range of the modified epoxy soybean oil.

The invention relates to an organic matter and ammonia borane compounded hydrogen storage material. The hydrogen storage material is prepared by compounding the organic matter and the ammonia borane, wherein the organic matter is phthalic anhydride, polyethylene oxide, dextrose, mannitol or mannitol hexaacetic ester. The preparation method comprises the following steps: 1) adding the organic matter to the purified acetonitrile solvent, and stirring for dissolving; 2) dissolving the ammonia borane into the mixing solvent comprising acetonitrile and methanol, and stirring at the temperature of 20 to 70 DEG C to obtain a uniform solution; and 3) carrying out vacuum drying, and removing the solvent, thus obtaining the hydrogen storage material. The invention has the advantages that the ammonia borane and the organic matter are taken as raw materials to prepare the hydrogen storage material at the lower hydrogen discharge temperature; the thermal decomposition and hydrogen discharge temperature of the ammonia borane can be effectively reduced; the generation of harmful gas impurities of borazole, diborane, ammonia and the like is effectively inhibited; the hydrogen storage material has quicker hydrogen discharge kinetics; in addition, the heat discharge amount is less in the hydrogen discharge course; and the enthalpy change of a decomposition reaction approaches to thermal neutrality; and the hydrogen storage material is beneficial to realizing the regeneration of reaction products through a solid-gas reaction or a chemical process under the relatively mild condition.

The invention discloses a novel formaldehydeless permanent press finishing agent for a fabric and a preparation method and application thereof. The formaldehydeless permanent press finishing agent for the fabric is prepared by performing a polymerization reaction on acrylamide, glyoxal, phthalic anhydride, sulfuric acid, potassium persulfate and the like. The product of the invention is mainly used for performing noniron finish on the fabric and improving the firmness of a dyed fabric and a printed fabric. Compared with the conventional N-methylol acrylamide resin, the permanent press finishing agent has prominent advantages of excluding of formaldehyde and crease resilience equivalent to or surpassing those of etherfied 2D (etherfied dimethylol dihydroxy ethylene urea) after being used for finishing a cotton fabric; and compared with the conventional formaldehydeless resin, the agent has the advantages of high crease resilience, strength loss less than that of a polycarboxylic formaldehydeless resin, cost lower than those of dimethylol dihydroxy ethylene urea (DMeDHEU) and butanetetracarboxylic acid (BTCA) and cost performance far higher than that of a polycarboxylic resin.

The invention discloses a synthesis method of synthesizing florfenicol. The synthesis method comprises the following steps: L-threo-(p-(methylsylfonyl) phenyl) serine ethyl ester which is used as raw material is processed by the protection by a protecting group, configurational transition, hydrolyzation, acetylation, re-protection, deoxidation, fluorination, and pre-hydrolyzation, so that the florfenicol is obtained, wherein, the protecting group R is one of benzoyl chloride, phthalic anhydride, cyanophenyl, and allyl compounds; the configurational transition is performed when sodium alcoholate or sodium methoxide exists. The raw material which is used in the method is a byproduct which is generated during the process of preparing thiamphenicol, is easy to get in the market, and is inexpensive; the technological operation is simple, the cost is low, the yield rate is high, and the synthesis method has industrialized value.

The invention discloses low-temperature low-conductivity polyurethane foam, a raw material composition, combined polyether and a preparation method thereof. The combined polyether comprises the following components in parts by weight: 30-50 parts of sorbitol-based polyether polyol, 20-40 parts of sucrose-based polyether polyol, 10-20 parts of glyceryl polyether polyol, 5-15 parts of phthalic anhydride polyester polyol, 2.0-3.0 parts of a surfactant, 1.5-2.5 parts of a chemical foamer, 0.3-0.7 part of a catalyst A, 0.2-0.5 part of a catalyst B, 0.8-1.5 part of a catalyst C, and 10-30 parts of 1, 1, 1, 3, 3-perfluoropropane. The total weight of polyether polyol and polyester polyol is 100 parts. The catalysts A, B and C are independently amine catalysts or metal catalysts, respectively, and are different from each other. The polyurethane foam is excellent in performance, strong in low temperature resistance, good in dimensional stability, low in heat conductive coefficient and wide in application range.

The invention relates to an interpenetrating polymer network anti-corrosive paint and a manufacturing method thereof. The paint is made of the raw materials based on the parts by weight: 20-50 parts of alkyd resin, 5-20 parts of phenolic resin, 10-40 parts of epoxide resin, 5-30 parts of cross-linking agent, 5-15 parts of phthalic anhydride, and 0.3-1 part of catalyst. In the manufacturing method, the alkyd resin, the phenolic resin and the epoxide resin are taken as interpenetrating polymer network resin, and the benzoic anhydride, the vulcabond and the amine resin are taken as cross linker. First, the alkyd resin is penetrated with the phenolic resin for a first cross bonding by using the cross linker; then, the obtained resin is penetrated with the epoxide resin for a second cross bonding by using the cross linker; at last, the synthetic resin with excellent combination property can be synthesized, and the anti-corrosive paint having high performance can be prepared.

The invention discloses combined polyether, a raw material composition, polyurethane foam as well as a preparation method and application thereof. The combined polyether comprises the following components in parts by weight: 100 parts of polyol, 1-4 parts of a surfactant, 0.3-1.3 parts of a chemical foaming agent, 1-3 parts of a catalyst, 15-30 parts of a flame retardant and 15-30 parts of a physical foaming agent, wherein polyol is a mixture of 40-60 parts of polyether polyol A, 20-40 parts of polyester polyol B and 10-20 parts of phthalic anhydride polyol. The foam has the advantages of excellent comprehensive property, low cost, a certain thermal insulation fire-retardant property and is simple in preparation method, safe to operate and wide in application range, high in construction and foam curing speed and short in time from mixing to foam molding curing ( only 10 minutes) and can be used in high-temperature, wind, cold and other 5-40 DEG C terrestrial environments.

The invention discloses a high-temperature-resistant rubber sealing ring for automobiles. The high-temperature-resistant rubber sealing ring comprises the following raw materials in parts by weight: 70-90 parts of ethylene-propylene-diene-terpolymer rubber, 10-30 parts of chloroprene rubber, 1-4 parts of an anti-aging agent, 0.8-1.5 parts of active zinc oxide, 0.2-0.4 part of magnesium oxide, 0.5-1.0 part of calcium oxide, 0.6-1.5 parts of butyltin mercaptide, 30-40 parts of modified kaolin, 10-15 parts of magnesium methacrylate, 1-3 parts of a promoter, 6-10 parts of soybean oil, 1-2 parts of ethyl methacrylate, 40-80 parts of paraffin oil, 0.2-0.5 part of triallyl phosphate, 1.0-1.5 parts of a crosslinking agent BIBP, 0.5-1.2 parts of an assistant crosslinking agent TAIC, 0.3-0.5 part of microcrystalline wax, 2-3 parts of a vulcanizing agent and 0.5-1 part of phthalic anhydride. The sealing ring disclosed by the invention has strong weather resistance, corrosion resistance and ozone resistance, and can be suitable for being used as the high-temperature-resistant rubber sealing ring for the automobiles.

The invention provides a synthetic resin composition which consists of the following components in percentage by weight: 35 percent of component A and 65 percent of component B, wherein the component A is formed by polymerizing the following monomers in parts by weight: 20 parts of polyethylene, 20 parts of polypropylene, 15 parts of polyester, 8 parts of nylon, 10 parts of phthalic anhydride and 4 parts of pentaerythritol; and the component B is prepared from the following raw materials in parts by weight: 20 parts of pine tar, 8 parts of naphthenic oil, 10 parts of coumarone indene resin, 5 parts of 420 resin and 57 parts of rubber powder. In the resin composition, high molecular material waste can be effectively utilized and changed into things of value, and environmental pollution can be reduced. The invention also provides a preparation method and application of the resin composition.