205 results about "Acid anhydride formation" patented technology

Modular carpet tiles having multiple layers are described, including a laminate layer having a compatibilizing agent. The laminate layer can include at least one polyolefin functionalized with at least one unsaturated organic acid and/or at least one unsaturated organic acid anhydride, such as maleic anhydride. The functionalized polyolefin can have an acid number from about 5 to about 55 mg KOH/g. Methods of making the tiles are also described.

The invention relates to isocyanate modified alkyd resin and a preparation method thereof. Isocyanate is utilized to modify alkyd resin, and the alkyd resin containing an ammonia ester structure is synthesized. The basic formula comprises, by weight: 20-33% of plant oil, 5-8% of polyatomic alcohol, 2-8% of organic acid anhydride, 5-10% of the isocyanate, 0.02-0.5% of catalyst, 35-50% of solvent and 3-8% of terminator. Varnish and enamel paint prepared by the isocyanate modified alkyd resin are better than ordinary middle-long-oil-degree alkyd resin paint in aspects of dryness, hardness, water resistance and the like, and are better than double-component polyurethane paint in aspects of toxicity, application property, odor and the like. The isocyanate modified alkyd resin is widely applied to the surfaces of products made of wood, metal, plastic and the like to have functions of protection and decoration. Due to the fact that the isocyanate modified alkyd resin is both hard and soft, the isocyanate modified alkyd resin has certain resistance to stone strike, can serve as primer and repair paint of agricultural vehicles and trucks, and has good market prospects accordingly.

An anhydride and resorcinol latent catalyst system for a phenolic resole resin provides a resin having long pot life and long shelf life, yet cures quickly thereafter.

The invention discloses synthesis and application of a reaction type halogen-free phosphorus-containing flame retardant for polyurethane. A phosphorus-containing monomer derivative is formed by a phosphorus-containing monomer 9, 10-dihydro-9-oxa-10-phospha- phenanthrene-10-oxide (DOPO) and unsaturated polycarboxylic acid or anhydride, further the phosphorus-containing monomer derivative and polyhydric alcohols are subjected to esterification reaction so as to form the reaction type halogen-free phosphorus-containing flame retardant which is liquid at a room temperature, the molecular weight of the flame retardant is 300-1000g/mol, a terminal group of the flame retardant is a hydroxide radical, and the degree of functionality of the flame retardant is 2-6. The application shows that the flame retardant has a very good compatibility with a polyurethane raw material system and can be mixed with a polyurethane raw material in any proportion. The flame retardant is used for preparing rigid polyurethane foam with the density of about 31kg/m<3> and has relatively good compression strength and high-low temperature size stability. The oxygen index of the polyurethane foam is increased to 23.9% from 19.2% of oxygen index of a blank sample; and the oxygen index of polyisocyanurate foam is increased to 25.2% from 20.3% of oxygen index of a blank sample. The flame retardant can be applied to the fields of rigid polyurethane foam, elastomers, synthetic leather slurry and the like.

The invention discloses a method for preparing a polyimide porous nanofiber electrode diaphragm. The method comprises the following steps: carrying out condensation reaction by adopting binary organic amine and binary organic acid anhydride in an organic solvent, thereby obtaining a polyamide acid solution; adding a soluble metal salt to prepare a spinning precursor, preparing a polyamide acid-metal salt electrostatic spinning fiber diaphragm by virtue of high-voltage electrostatic spinning, and performing thermal imidization treatment, thereby obtaining a polyimide-metallic oxide fiber composite diaphragm; and dissolving the composite diaphragm in an inorganic acid aqueous solution for performing acid treatment, so that metallic oxide nanoparticles are converted into soluble metal salts so as to be dissolved in the inorganic acid aqueous solution so as to obtain the polyimide nano/micron porous fiber diaphragm. The method has the advantages that according to the polyimide nano/micron porous fiber diaphragm, the mechanical strength, thermal stability, liquid holdup, permeability, wettability and migration rate of conductive ions of the diaphragm can be effectively improved, and the liquid junction resistance of the diaphragm and electrolyte and the contact resistance of the diaphragm and the electrode can be reduced, so that the electrochemical performance of a supercapacitor is improved.

The invention relates to a machinable solid buoyancy material and a preparation method thereof. The machinable solid buoyancy material belongs to a functional nonmetallic material and comprises the following components in part by mass: 100 parts of epoxy resin, 15 to 55 parts of amine epoxy curing agent and 30 to 130 parts of glass beads, wherein the epoxy resin is bisphenol S type epoxy resin or glycidol epoxy resin; and the amine epoxy curing agent is polyamide 650, polyamide 651, tertiary nitrogen type organic amine or quaternary nitrogen type organic amine, bismaleimide, low molecular weight polyacrylamide, imidazoles or organic acid anhydride compounds. The preparation method comprises the following steps of: heating the epoxy resin and the amine epoxy curing agent, weighing the epoxy resin and the amine epoxy curing agent, blending and stirring the epoxy resin and the amine epoxy curing agent, adding the glass beads, stirring again, kneading the materials, after taking the material out, coating a mould release agent on the inner wall of a die and sticking mould release paper; filling the material into the die; covering by using a cover; curing the die in a drying oven; and separating the material from the die on a demoulding machine. The machinable solid buoyancy material can meet the requirements on underwater projects, permanent buoys and the like.

The invention provides a purification method of lithium bis(fluorosulfonyl)imide. The method comprises the following steps of (1) dissolving a lithium bis(fluorosulfonyl)imide crude product in an organic solvent; filtering to remove insoluble substances and obtain filter liquid; (2) mixing the filter liquid and organic acid anhydride and then heating to obtain mixed liquid, wherein the organic acid anhydride has a structure shown as a formula I, and in the formula I, R1 and R2 are independently selected from C1-C5 alkyls or C1-C5 halogen alkyls; (3) performing evaporation treatment on the mixed liquid to remove the organic solvent and obtain an intermediate product; (4) crystallizing the intermediate product in a low-polarity organic solvent to obtain a lithium bis(fluorosulfonyl)imide pure product, wherein the polarity of the low-polarity organic solvent is lower than 4. The purification method provided by the invention has the advantages that the organic acid anhydride is used for removing moisture in the lithium bis(fluorosulfonyl)imide crude product; other impurities are not introduced; the recrystallization is performed through solvent polarity regulation. The purification method provided by the invention has the advantages that the process is simple; the obtained lithium bis(fluorosulfonyl)imide has high purity.

A lipophilic starch is provided along with methods of making the same. The starch is prepared by modifying the starch with an organic acid anhydride reagent, such as octenyl succinic anhydride, drying the modified starch to a moisture content of less than 15% by weight, and then heat treating the dried starch at a temperature of at least 100° C. for at least one minute.

The invention discloses a method for modifying wood by filling grafted cell walls with organic monomers and polymerization-filling cell cavities, which relates to a wood modification method. The invention solves the problem of difficulty in simultaneously enhancing mechanical properties and durability of wood in the existing wood modification method. The method comprises the following steps: 1, preparing organic acid anhydride solution; 2, soaking the wood with the organic acid anhydride solution; 3, filling grafted wood cell walls with organic acid anhydride by heating; 4, preparing the organic polymerizable monomer solution; 5, soaking the wood with the organic polymerizable monomer solution; and 6, carrying out polymerization-filling on the wood cell cavities with the monomers by heating. Since organic function micromolecules firstly enter the wood cell walls, the method realizes filling and bonding and eliminates a great deal of hydroxyl groups in the cell walls, thereby enhancing wood durability; and the wood cell cavities are soaked by the organic polymerizable monomers to initiate the polymerization and realize the filling of the cell cavities, so that the wood has higher mechanical properties and durability.

The embodiment of the invention provides a modified function material, a blue photoresist material and a color filter as well as preparation methods of the modified function material, the blue photoresist material and the color filter and a display device, belongs to the field of liquid crystal displays, and aims to improve the air quality in the environment. The modified function material comprises an inorganic mixed dispersion body and a coating layer on the outer part of the inorganic mixed dispersion body; the inorganic mixed dispersion body is formed by mixing and dispersing B2O3, Na2O, Li2O, ZrO2, Al2O3 and TiO2 by a dispersant; the coating layer is a copolymer generating by styrene and organic acid anhydride by the inorganic mixed dispersion body. The modified function material, the blue photoresist material and the color filter as well as the preparation methods of the modified function material, the blue photoresist material and the color filter, and the display device can be used for producing the color filter.

The invention relates to a preparation method of nano-SiO2 modified alkyd resin. The nano-SiO2 modified alkyd resin comprises, by weight, 30-60% of fatty acid, 6-20% of polyol, 4-10% of diol, 2-8% of nano-silica, 12-35% of organic acid anhydrides, 0.01-0.5% of an esterification catalyst and 30-45% of a solvent. The nano-SiO2 modified alkyd resin prepared in the invention has good storage stability, and a coating layer prepared by using the nanometer composite resin has excellent hardness, wear resistance, scratch resistance, ultraviolet resistance and ageing resistance and does not influence the transparence or the compatibility of the resin, and can be widely applied in surface coating and protection of woodenware, metals, plastics and other products.

The invention relates to a fluorine-silicon modified waterborne alkyd resin and a preparing method thereof. The fluorine-silicon modified waterborne alkyd resin is prepared from vegetable oil fatty acid, organic acid anhydride, polyol, fluorinated allyl monomers, isocyanate, hydroxyl-terminated organic silicon, acrylic monomers and deionized water. Single-component waterborne paint, double-component waterborne paint and room-temperature curing paint can be blended with the fluorine-silicon modified waterborne alkyd resin prepared through the method. The prepared fluorine-silicon modified waterborne alkyd resin has the performance such as high adhesion, stain resistance, high hardness, water resistance, durability, hydrophobicity and self-cleaning performance, and can be widely applied to waterborne wood paint, waterborne industrial paint, waterborne anti-fouling paint, waterborne corrosion resistance paint, waterborne special engineering paint such as radar dome materials, wind power generation, nuclear power and vessel paint and the like.

The invention provides a preparation method of tetramethyl biphenyl, which comprises the following steps: mixing o-xylene, oxidizer, additive and metal catalyst, and reacting to obtain the tetramethyl biphenyl, wherein the additive is organic acid and/or organic acid anhydride, and the oxidizer is inorganic oxidizer and/or organic oxidizer containing metal cation. Compared with the prior art of synthesizing tetramethyl biphenyl from halogenated o-xylene, the invention uses the o-xylene for direct coupling to obtain the tetramethyl biphenyl. The raw material o-xylene is cheap and accessible, and the preparation of the halogenated o-xylene is not needed, so the invention lowers the production cost, is simple to operate and has the advantages of mild reaction conditions and low facility request; and under the action of the catalyst, the o-xylene is directly coupled to prepare the tetramethyl biphenyl, and all the carbon atom frameworks of the o-xylene enter the product, so the invention also has the advantage of high economical efficiency of atoms.

A fast-response thermoplastic shape-memory polyimide and a preparation method thereof, related to a polyimide and a preparation method thereof. The present invention aims to solve the problem in high-temperature conditions of slow shape recovery poor stability, and poor mechanical properties of a shape-memory polymer prepared by utilizing an existing method. The structural formula of the polyamide of the present invention is as represented by formula (I). The preparation method is: 1. preparation of a diamine solution; 2. preparation of an anhydride-terminated high molecular weight polyamic acid; 3. preparation of a viscous sol-gel; and, 4. preparation of the thermoplastic shape-memory polyimide. The thermoplastic shape-memory polyimide prepared per the present invention is provided with a very fast shape recovery rate and improved shape-memory effect. The present invention is applicable in the field of polyimide preparation.

An aromatic polycarbonate resin composition comprising: 100 parts by weight of a resin component (A) mainly comprising an aromatic polycarbonate, 0.1 to 200 parts by weight of a solid inorganic compound (B), at least one compound (C) selected from the group consisting of an organic acid, an organic acid ester, an organic acid anhydride, an organic acid phosphonium salt and an organic acid ammonium salt, 0.001 to 1 part by weight of at least one organic acid metal salt (D) selected from the group consisting of an organic acid alkali metal salt and an organic acid alkaline earth metal salt, and 0.01 to 1 part by weight of a fluoropolymer (E), wherein compound (C) is present in an amount wherein a mixture of compounds (B) and (C) exhibits a pH value of from 4 to 8.

The invention belongs to the technical field of nano materials, and particularly relates to a high-performance epoxide resin composite material and a preparation method. Carboxylic acid, chloroformylation, amination or hydroxylation are carried out to the carbon nano tube; and the carbon nano tube is modified by small molecular aromatic polyanhydride compound so as to prepare the carbon nano tube which carries acid anhydride group. The carbon nano tube is dispersed in epoxide resin substrate by ultrasonic oscillation and high-speed stirring, is cured by adopting organic acid anhydride curing agent so as to obtain the carbon nano tube/epoxide resin composite material. The invention leads the preparation of the carbon nano tube/epoxide resin composite material to be more convenient, the activity of taking part in reaction of the carbon nano tube is endowed, and acid anhydride group of the carbon nano tube and the epoxide resin group of the epoxide resin generate chemical cross linking, thus improving the dispersion of the carbon nano tube in the epoxide resin and obtaining high-performance epoxide resin composite material. Compared with the control sample, all the mechanical performance indexes of the cured composite material are improved by 5 percent to 300 percent and the volume resistivity is reduced by 3 to 9 order of magnitude.

The invention relates to a method for preparing anti-scratch matt alkyd resin. The anti-scratch matt alkyd resin comprises the following components in percentage by weight: 17 to 35 percent fatty acid, 16 to 30 percent of polyhydric alcohol, 18 to 40 percent of organic acid anhydride, 0 to 2 percent of esterifying catalyst, and 30 to 45 percent of solvent. The anti-scratch matt alkyd resin is synthesized by terephthalic acid or isophthalic acid with a symmetric structure and neopentyl glycol, diglycol and pentaerythritol by a polymer method, and has the characteristics of quick dryness, easy extinction, good transparency and the like. A PU () high-grade matt wood painted tool made by the anti-scratch matt alkyd resin is soft in hand feel, plump and smooth, and rigid with soft, gives people the feeling of elegance and comfort, adapts to modern aesthetic view, and is popular in market and clients. The anti-scratch matt alkyd resin can be widely applied to the surface of woods, metal, plastic and other products for protecting and decorating.

The invention relates to a grapheme-modified waterborne anticorrosive coating. The grapheme-modified waterborne anticorrosive coating is composed of a grapheme-modified waterborne alkyd resin, pigment and filler, a cosolvent, a leveling agent, a dispersing agent, a wetting agent, a defoaming agent, a thickening and anti-settling agent, a flash rust inhibitor, a pH value regulator and deionized water, wherein the graphene polyurethane-modified waterborne alkyd resin is prepared from vegetable oil or fatty acid, organic acid anhydride, dimethylolpropionic acid, polyol, grapheme, polyisocyanate and deionized water through a reaction. The prepared grapheme-modified waterborne anticorrosive coating integrates the advantages of grapheme and polyurethane, has properties like high hardness, good adhesion, good chemical resistance, antistatic performance, corrosion resistance, aging resistance and good mechanical properties, and is endowed with excellent corrosion resistance, aging resistance, excellent mechanical properties and antistatic performance.

The invention relates to high-solid low-viscosity alkyd resin for removing odor. The alkyd resin is prepared from a vegetable oil fatty acid, an organic acid anhydride, benzoic acid, a polyhydric alcohol, an esterification catalyst, glycidyl tertiary carbonate, a reflux solvent and a diluting solvent through a step-by-step polycondensation reaction. The invention also provides a preparation methodof the high-solid low-viscosity alkyd resin for removing odor. The alkyd resin prepared by the invention is free of benzene and ketone, has a solid content of 93+/-2%, viscosity (Gardner-Holdt tube/25 DEG C) of less than or equal to 10s, an acid value of less than or equal to 8mg KOH/g, a hydroxyl value of larger than or equal to 135mg KOH/g and a number-average molecular weight Mn of 2200-3000,has excellent adhesive force, water resistance, chemical resistance, wear resistance and scratch resistance, and has the characteristics of high solvent volatilization speed, high drying speed and thelike in the film forming process. The leveling property and the transparency of a coated film are good; no solvent is left after the film is coated for 24 hours; and the odor removing effect is achieved. The alkyd resin is widely applied to surface decoration and protection of products such as woodware, metals, plastics and the like.

The invention relates to a phosphate silkete penetrating agent and a preparation method thereof, and belongs to the technical field of textile auxiliary agents. The phosphate silkete penetrating agent comprises the following components in parts by weight: 5 parts of fatty alcohol, 1-4.5 parts of fatty alcohol-polyoxyethylene ether, 1-1.5 parts of a phosphorylation reagent and 1-2 parts of organic acid anhydride. As substances such as phosphorus pentoxide, organic acid anhydride and fatty alcohol-polyoxyethylene ether which are relatively gentle in reaction and easy in reaction speed control are adopted to react, the phosphate silkete penetrating agent which is small in bubble, good in permeability and free of irritant smell can be prepared.

The invention relates to a decoloring method for reclaiming styrene by means of extraction and rectification, which mainly solves the problems of a large quantity of solid waste and complex technology caused by adoption of gumbrine for decolorization or high equipment requirement and complex flow caused by adoption of a nitric acid for decolorization. The decoloring method comprises the following steps: a decoloring agent is added into a solvent and mixed and dissolved to obtain a material one; the material one and styrene-bearing raw oil enter into the upper part and the middle part of a rectification tower respectively; light constituents the boiling point of which is lower than that of the styrene are rectified on the top of the tower, and the chrominance of the light constituents is less than or equal to 100 as calculated by the platinum-cobalt chrominance unit; a mixture material two of the styrene and the solvent is obtained at the bottom of the tower, wherein the decoloring agent is selected from at least one of an organic acid or organic anhydride, and the solvent is selected from at least one among polar solvents the boiling point of which is more than 160 DEG C; the material two enters into the middle of a solvent reclaiming tower, coarse styrene the chrominance of which is less than or equal to 10 as calculated by the platinum-cobalt chrominance unit is rectified on the top of the tower, and a reclaimed solvent is obtained at the bottom of the tower; and the coarse styrene enters into the middle of a refined styrene tower, pure styrene the chrominance of which is less than or equal to 10 as calculated by the platinum-cobalt chrominance unit is rectified on the top of the tower, and heavy constituents the boiling point of which is higher than that of the styrene are obtained at the bottom of the tower. The technical proposal well solves the problems.

Disclosed is an amino acid racemization method which consists of dissolving the L-amino acid in organic acid solvent, acylating with organic acid anhydride, thus achieving a L-amino racemization ratio of 100% with a fast reaction speed and high yield, the acid anhydride and organic acid solvent can be reclaimed for circulation use.

The invention relates to a fluorine-modified water-based alkyd resin and a preparation method thereof. Its components are composed of vegetable oil fatty acids, organic acid anhydrides, polyols, epoxy resins, fluorine monomers, acrylic monomers and deionized water; The fluorine-modified water-based alkyd resin prepared by the invention can be formulated into one-component water-based coatings, two-component water-based coatings, and normal-temperature curing coatings. The fluorine-modified water-based alkyd resin prepared by the present invention has good adhesion, stain resistance, water resistance, alkali resistance, durability, hydrophobicity, low dielectric constant and other properties, and is widely used in marine fields, wood Coatings, anti-fouling and water-repellent coatings, which can also be used in radome materials, have enormous application potential.

The present invention relates to a novel acid-blocked amine catalyst and its application in preparing polyurethane. The acid-blocked amine catalyst has the general structure shown below, where A is a residue of an organic acid anhydride; R1 is H or C1-C6 alkyl; R2 is H or C1-C6 alkyl; n is 0 An integer of up to 10; B is a compound containing a protonated amine and one or more primary, secondary or tertiary amine groups.