6 results about "Phosphoryl chloride" patented technology

This invention relates to the field of flame retardant preparation technology, and more particularly to a method for preparing an environmentally friendly and highly efficient flame-retardant polyolefin cable sheath material. The invention uses compounds containing primary amino and amide bonds and compounds containing phenyl and phosphoryl chloride groups as raw materials. The reaction is carried out at room temperature for 0.5-1 h, then heated to 45 °C for 3-4 h, and then to 65 °C for 5-6 h. Through a condensation reaction, a phosphoramide macromolecular flame retardant containing phenyl and amide bonds is obtained, with a yield as high as 80.5-95.6%. This flame retardant is added to polyolefin cable sheath material at a mass ratio of 25%, then compounded and extruded to obtain a halogen-free flame-retardant polyolefin cable sheath material. The flame retardant molecule prepared by this invention simultaneously contains phosphorus and nitrogen flame-retardant elements and amide bonds forming a char skeleton. During combustion, it can exert a phosphorus-nitrogen synergistic flame-retardant effect and promote the catalytic char formation of the matrix, which can significantly reduce the heat and toxic gas release of polyolefin cable sheath material during combustion, thereby providing protection for the lives of people in fire scenes.

The present application relates to fine chemical technology field, especially to a kind of anti-micro pitting additive and its preparation and application.The present application uses starch masking method, uses hydroxylated boron nitride and O, O-dialkyl thiophosphoryl chloride to carry out chemical reaction to prepare this anti-micro pitting additive, and the core skeleton is hexagonal boron nitride nanosheet, one side contains hydroxyl functional group, the other side is covalently connected O, O-dialkyl thiophosphate, and the process condition used is mild;The anti-micro pitting additive prepared by the present application can be used as multifunctional lubricant additive, utilizes the filling and interlayer slip of boron nitride nanosheet, the chemical adsorption of hydroxyl surface and friction pair, the tribological chemical reaction of O, O-dialkyl thiophosphate and friction pair synergistic effect, obtains good extreme pressure, antiwear, anti-micro pitting and anticorrosion etc., suitable for long-acting stable friction and micro pitting lubrication protection under harsh working conditions.

This invention provides a method for preparing melamine pyrophosphate and its application, belonging to the field of flame retardant technology. The invention uses pyrophosphoryl chloride and melamine as raw materials, reacting them in an alcohol-water mixed solvent. After the reaction, the mixture is neutralized with alkali, and post-processed to obtain melamine pyrophosphate. This invention uses pyrophosphoryl chloride as the phosphorus source, solving the problems of insufficient reaction due to the high viscosity of raw materials in the traditional pyrophosphate method and the hygroscopic and difficult-to-store raw materials in the phosphorus pentoxide method. The reaction process does not require strong acid catalysis; the byproduct hydrogen chloride is converted to ammonium chloride after neutralization with ammonia water, avoiding the generation of high-salt wastewater, making the process environmentally friendly. The method of this invention features mild reaction conditions, simple operation, high product purity, and good thermal stability. The obtained melamine pyrophosphate has a purity ≥95% and a 5% thermal decomposition temperature ≥300℃, making it suitable as a halogen-free flame retardant for widespread application in epoxy resins, polyolefins, nylon, coatings, rubber, and other fields.

The present invention relates to one pot process for preparation of salts of bis[2- (perfluorohexyl)ethyl]phosphate or its solution comprising, reacting perfluorohexyl ethyl alcohol with phosphoryl chloride in the presence of organic base in first solvent to obtain bis[2-(perfluorohexyl)ethyl]phosphorochloridate, which is hydrolyzed with water to give bis[2-(perfluorohexyl)ethyl] hydrogenphosphate, further the reaction mass is treated with base in second solvent to obtain desired product with high yield, which is not only cost-effective but also industrially scalable.

The application provides a chiral morpholino phosphorus oxychloride monomer and a preparation method and application thereof, and the structure of the monomer is shown in formula I or II: wherein X represents an oxygen atom or a sulfur atom; B represents a base; R 1 is selected from an optionally substituted secondary substituted amine group, an optionally substituted alkoxy group, an optionally substituted phenoxy group, a guanidino group, and a linked nitrogen forming an optionally substituted heterocyclic ring; R 2 is selected from an optionally substituted or unsubstituted tertiary alkyl group, an optionally substituted or unsubstituted benzyl group, an optionally substituted sulfonyl group, and an optionally substituted acyl group. The application can obtain the chiral morpholino phosphorus oxychloride monomer in a stereochemically pure or substantially pure form by using an efficient catalytic asymmetric desymmetrization strategy. And the corresponding morpholino oligonucleotide chain can be synthesized based on the monomer, thereby providing a powerful synthesis platform for developing a new generation of morpholino oligonucleotide drugs with precise stereostructure and optimized performance.