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67results about How to "Good hydrolytic stability" patented technology

High basic value (TBN400) sulfurized calcium alkyl and preparation method thereof

The invention relates to high base number (TBN400) vulcanized alkyl phenol calcium and a preparation method thereof. The vulcanized alkyl phenol calcium has a chemical structure as right. The preparation method is as follows: in a system containing solvent and diluent oil, alkyl phenol compound, shielded phenol compound, calcium oxide and / or calcium hydroxide and sulfur are subjected to sulfonation / neutralization reaction at a temperature of between 60 and 180 DEG C to generate phenolate intermediate; balanced calcium oxide and / or calcium hydroxide are added into the mixture, carbon dioxide is introduced, and the mixture is subjected to carbonation reaction; and alkyl polylol is added into the mixture at the sulfonation / neutralization reaction or respectively at the sulfonation / neutralization reaction and the carbonation reaction to participate in the reaction, long-chain carboxylic acid is added into the mixture at the sulfonation / neutralization reaction or respectively at the sulfonation / neutralization reaction and the carbonation reaction to participate in the reaction, and products are obtained through refining. The vulcanized alkyl phenol calcium has the characteristics of high base number, low viscosity, low precipitation number, good heat storage stability, and the like, and has excellent combination property, does not cause environmental protection problem during use, and belongs to an environment-friendly product, and adopts a one-stage process, has mild reaction conditions, and is easy to filter.
Owner:JINZHOU DPF TH CHEM CO LTD

Hydrolysis-resistant aliphatic-aromatic copolyester and preparation method thereof

The invention discloses hydrolysis-resistant aliphatic-aromatic copolyester and a preparation method thereof. The preparation method comprises the following steps of: (1) carrying out ester exchange reaction on aromatic binary acid ester or aromatic binary acid and excessive dihydric alcohol to obtain ester P1; (2) reacting aliphatic binary acid, cyclized aliphatic binary acid, an esterification derivative of aliphatic binary acid or an esterification derivative of cyclized aliphatic binary acid with aliphatic dihydric alcohol to obtain ester P2; and (3) mixing P1 with P2, adding an antioxidant to carry out condensation polymerization, then adding a carbonate mineral and a silane compound, and evenly mixing, thus the hydrolysis-resistant aliphatic-aromatic copolyester is obtained. The aliphatic-aromatic copolyester disclosed by the invention has better hydrolysis stability, properties of a polymer in storing and processing processes can be ensured to be stable, and the property retention rate of the polyester product can be improved; and meanwhile, the polyester product also has degradation performance after the application task of the product is completed, and a hydrolysis-resistant component is added in a synthetic process, thus addition during modification is avoided and process is simplified.
Owner:KINGFA SCI & TECH CO LTD +1

Preparation method of iso-fatty acid methyl ester biodiesel

InactiveCN103740414AAtomic weight increaseWith low coagulationOrganic compound preparationCarboxylic acid esters preparationAlkanePtru catalyst
The invention relates to a preparation method of iso-fatty acid methyl ester biodiesel. The preparation method is characterized in that the iso-fatty acid methyl ester biodiesel is prepared by treating fatty acid methyl ester biodiesel serving as a raw material and gas alkane on an acid supported catalyst through an alkylation process, wherein the using amount of the acid supported catalyst is 2-10 percent by weight of fatty acid methyl ester; the molar ratio of the gas alkane to unsaturated methyl ester in the fatty acid methyl ester is (10-40):1; the pressure control range is 6-8MPa; the temperature is 90-130 DEG C; the reaction time is 2-4 hours. The preparation method has the advantages that the prepared product is low in condensability and excellent in oxidation and hydrolytic stability, the condensation point is lowered by 10-30 DEG C than before reaction, and the oxidation stability is enhanced by over one time; by adopting the product prepared with the method, the defects of the existing biodiesel are overcome, and the product performances are superior to those of commercialized products and the other currently-researched alternative energy sources. The product can become a safe and reproducible high-end synthetic diesel product.
Owner:INNER MONGOLIA JINDI BIOMASS

High-impedance soldering flux for single panel of power source charger and preparation method of high-impedance soldering flux

The invention relates to the technical field of soldering flux, in particular to high-impedance soldering flux for a single panel of a power source charger and a preparation method of the high-impedance soldering flux. The high-impedance soldering flux for the single panel of the power source charger consists of the following ingredients in percentage by weight: 1 percent to 5 percent of hydrogenated rosin, 0.1 percent to 0.8 percent of adipic acid, 0.4 percent to 1.2 percent of sebacic acid, 1 percent to 3 percent of succinic acid, 0.5 percent to 2 percent of glycollic acid, 0.1 percent to 0.8 percent of dibromo butylene glycol, 0.5 percent to 2 percent of surface active agents, 2 percent to 7 percent of film forming additives and 80 percent to 92 percent of absolute ethyl alcohol. The high-impedance soldering flux for the single panel of the power source charger has the advantages that the moisture cannot be easily absorbed, so the single panel of the power supply charger is prevented from generating quality problems caused by moisture absorption in rainy humid weather in spring, and in addition, the single panel of the power supply charger has the characteristic of high impedance.
Owner:广东剑鑫科技股份有限公司
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