9 results about "Suberic acid" patented technology

Disclosed are a flux containing rosin, an active agent, and a solvent, the active agent containing an imidazole compound and two dicarboxylic acids, the two dicarboxylic acids being combined with malonic acid using one selected from succinic acid, adipic acid, and sebacic acid, and a method for preparing a joined body using the flux. Or the soldering flux contains rosin, an active agent and a solvent, the active agent contains an imidazole compound and two dicarboxylic acids, and the two dicarboxylic acids are combined with succinic acid and one selected from suberic acid, sebacic acid, methylsuccinic acid, malic acid and malonic acid. According to the present invention, it is possible to provide a flux capable of increasing the leg size and suppressing the occurrence of bridging during soldering.

The present application relates to a method for preparing a cadaverine dicarboxylate (cadaverine suberate or cadaverine azelate), the method comprising: a first step of obtaining a lysine dicarboxylate by culturing an L-lysine producing microorganism in a culture medium to which a dicarboxylic acid in the form of a diammonium dicarboxylate is added; and a second step of converting the lysine dicarboxylate into a cadaverine dicarboxylate. According to the present application, a cadaverine dicarboxylate (cadaverine suberate or cadaverine azelate) of high purity can be obtained without ion resin exchange, a decarboxylation process, and a distillation process by implementing the method according to the above procedure.

The invention belongs to the field of care products, and discloses a natural substitute of a siloxane elastomer as well as a preparation method and application thereof, the natural substitute is a cross-linked polymer formed by esterification reaction of chondroitin sulfate and one or more medium-chain dibasic acids with the carbon atom number of 6-10, wherein the medium-chain binary acid is preferably selected from one or more of adipic acid, suberic acid and sebacic acid, and can be naturally derived from vegetable oil. The mass ratio of the chondroitin sulfate to the medium-chain binary acid is 1: 4 to 1: 8. The preparation method comprises the following steps: dissolving chondroitin sulfate in a water-glycerol solvent, mixing with a medium-chain dibasic acid-glycerol premixed solution, reacting for 24-48 hours at 180-220 DEG C under inert gas protection and vacuum conditions, and carrying out steam extraction, cooling and drying to obtain a final product. The natural source index of the obtained substitute is 1, the sensory property of the substitute is equivalent to that of a siloxane elastomer when the substitute is applied to personal care compositions such as skin cream, hair conditioners and cosmetics, and the substitute has the advantages of environmental friendliness and biodegradability.

The application discloses a method for recycling polyester by amine decomposition under rare earth catalyst, comprising: under the catalysis of a rare earth catalyst, waste polyester and imidazole salt substances are subjected to amine decomposition reaction to obtain a crude product; the waste polyester comprises at least one of polyethylene terephthalate, polytrimethylene terephthalate, polyethylene isophthalate, polytrimethylene isophthalate, polyethylene succinate, polyethylene adipate, polyethylene suberate and polyethylene sebacate; the crude product is hydrolyzed in an alkali solution, extracted, and the organic phase is taken to obtain hydroxyethyl imidazole salt substances and / or hydroxypropyl imidazole salt substances; the water phase is acidified and precipitated, and solid-liquid separation is performed to obtain organic diacid. The application can utilize a large amount of recycled polyester materials, one-pot method is used to recycle dibasic carboxylic acid and imidazole salt value-added chemicals, and the recycled dibasic carboxylic acid and imidazole salt value-added chemicals can be applied to the polyester industry again.

The invention discloses a multifunctional rust-removing and rust-preventing lubricating cleaning fluid for ship pipelines and a preparation method of the multifunctional rust-removing and rust-preventing lubricating cleaning fluid, and relates to the technical field of rust-removing and rust-preventing lubricating cleaning fluid for ship pipelines and preparation of the multifunctional rust-removing and rust-preventing lubricating cleaning fluid. Comprising the following components: 20-30 parts of an organic acid complexing agent, 8-15 parts of a low-foam surfactant, 5-12 parts of a metal corrosion inhibitor, 3-8 parts of a lubricating film-forming agent, 4-9 parts of a reducing agent and 40-60 parts of water. Wherein the organic acid complexing agent is formed by compounding citric acid and glycolic acid according to the mass ratio of 1: 0.51: 1.5; the low-foam surfactant comprises suberic acid dimonoethanolamide polyoxyethylene ether and alkyl polyoxyethylene ether phosphate in a mass ratio of 1: 11: 2, the whole formula realizes stable integration through component optimization and a mild preparation process, the functions of rust removal, rust prevention, lubrication and low-foam cleaning are synchronously completed, the maintenance process is greatly simplified, the downtime is shortened, and the production cost is reduced. The comprehensive cost is reduced.

To provide a flux capable of increasing a fillet size and suppressing the occurrence of a bridge in soldering, and to provide a method for producing a joined body using the same.SOLUTION: The flux contains rosin, an activator and a solvent, wherein the activator contains an imidazole compound and two kinds of dicarboxylic acids, and the two kinds of dicarboxylic acids are composed of one kind selected from the group consisting of succinic acid, adipic acid and sebacic acid, and malonic acid. Alternatively, the flux contains rosin, an activator, and a solvent, wherein the activator contains an imidazole compound and two kinds of dicarboxylic acids, and the two kinds of dicarboxylic acids include succinic acid and one kind selected from the group consisting of suberic acid, sebacic acid, methylsuccinic acid, malic acid, and malonic acid.SELECTED DRAWING: None

This invention relates to a highly branched liquid epoxy resin. The process involves first performing a transesterification reaction between 1,3,5-tris(2-hydroxyethyl)cyanuric acid and dimethyl octanoate in xylene solvent to extend the chain. Then, pyromellitic acid is added for further symmetrical chain extension to obtain a rigid polyhydroxy compound. This compound is then reacted with epichlorohydrin and sodium hydroxide, undergoing sequential ring-opening and ring-closing reactions to obtain the highly branched liquid epoxy resin. When used in a 50 / 50 powder coating system to replace part of the E-12 epoxy resin, the resulting coating exhibits good hardness, scratch resistance, and water resistance. It is applied directly externally without affecting the original powder coating system. Furthermore, the hardness range of the coating can be adjusted by the amount added, making it convenient to use, widely applicable, and with promising application prospects.

The invention discloses a preparation method of a 3D printing consumable machine capable of improving low-temperature toughness. The 3D printing consumable capable of improving low-temperature toughness comprises the following components in parts by weight: urethane acrylate, a monomer, a photoinitiator, a defoaming agent, a stabilizer, a flexibilizer, a silane coupling agent and an antioxidant. Wherein the toughening agent is prepared from the following components in parts by weight: maleic anhydride, dicumyl peroxide and europium acetate loaded calcium suberate. The preparation process of the europium acetate loaded calcium suberate comprises the following steps: A1, treating the surface of europium acetate by using a silane coupling agent; a2, putting the treated europium acetate and calcium suberate into a stirrer, stirring for 3 hours at the stirring speed of 2000r / min, dispersing and mixing, and drying to obtain europium acetate loaded calcium suberate. The invention has the beneficial effect that the toughness in a low-temperature environment can be improved.

The object of the present invention concerns a hair restructuring association comprising or alternatively consisting of: (a) a quaternary ammonium salt of formula (I) and (b) at least one sulpho-derivative of vegetable fatty acids, wherein R5, R6 are independently chosen between hydrogen and a radical R0, R0 consists of the following structure of formula (II), R1 is chosen from the group consisting of: hydrogen, methyl, isopropyl, sec-butyl, isobutyl, ethylenemethylthio, benzyl, para-hydroxybenzyl and 3-methylene-1H-indole, R2, R3, R4 are independently chosen from the group consisting of: methyl, ethyl, n-propyl, isopropyl, n-butyl, isobutyl, sec-butyl and tert-butyl, mX− is chosen from the group consisting of: formic acid, acetic acid, unsaturated monocarboxylic acids, adipic acid, aldaric acid, oxalic acid, phthalic acid, azelaic acid, sebacic acid, malonic acid, succinic acid, tartaric acid, glutaric acid, pimelic acid, maleic acid, malic acid, fumaric acid and suberic acid, isocitric acid, citric acid, fatty acids, acidic amino acids, keto acids and aromatic carboxylic acids, m is an integer number comprised between 1 and 22, n is comprised between 2 and 20.