65 results about "Ethyl hydroperoxide" patented technology

The invention discloses a low-temperature stable organic peroxide emulsion and a safe preparation method thereof, and the emulsion comprises diisobutyryl peroxide, a hydroperoxide stabilizer, an organic solvent containing 2, 2, 4-trimethyl-1, 3-pentanediol diisobutyrate, and an emulsifying / dispersing agent. Through a low-temperature high-shear dispersion coupling cyclic emulsification method and in combination with real-time combustible gas / oxygen / smoke monitoring, the problem of freezing of the emulsion under an extremely cold condition (-40 DEG C) and the decomposition risk in the preparation process are solved. The obtained emulsion has significantly improved storage stability (greater than or equal to 85 days), low viscosity and excellent fluidity, and is suitable for industrial production.

The invention relates to a pressure-sensitive adhesive film and a preparation method thereof, and belongs to the technical field of high polymer materials. The pressure-sensitive adhesive film is prepared from the following components in parts by weight: 70 to 95 parts of 2-ethylhexyl acrylate, 5 to 20 parts of methyl methacrylate, 2 to 15 parts of acrylic acid, 0.1 to 2.0 parts of an emulsifier, 30 to 140 parts of deionized water, 0.02 to 1.2 parts of a buffering agent, 0.1 to 10 parts of a high-temperature-resistant modifier, 0.1 to 5 parts of a flame retardant and 0.2 to 1.5 parts of an initiator, the maleimide enhances the intermolecular force and improves the glass transition temperature, the melting point and the heat resistance of the material, the phosphite decomposes hydroperoxide and prevents yellowing, and the carbazole monomer improves the high temperature resistance; phenyl dichlorophosphate and ammonium polyphosphate in the flame retardant form phosphate, air and heat are effectively isolated, phosphorus-oxygen and silicon-oxygen bonds are cooperated, and the flame retardant efficiency is improved. The pressure-sensitive adhesive film prepared by the preparation method disclosed by the invention not only has an excellent permanent adhesion effect, but also has good flame retardance and high-temperature resistance.

The invention belongs to the technical field of resin polymerization additives, and particularly relates to an antioxidant type suspended emulsion terminator for PVC (polyvinyl chloride) and a preparation method thereof, the antioxidant type suspended emulsion terminator comprises the following raw material components in parts by mass: 5-30 parts of phenolic antioxidant; 5 to 20 parts of a thioester antioxidant; 0.1-5 parts of an ultraviolet light absorber; 0.1 to 5 parts of a chain terminator; 1-10 parts of a heat stabilizer; 0.1 to 7 parts of a stabilizer; 0.1 to 5 parts of an emulsifier; 0.1-5 parts of a wetting dispersant; according to the invention, through the combination of the selected main and auxiliary antioxidants and the combination of the ultraviolet light absorber and the heat stabilizer, the defect structure of PVC is improved at the end of PVC polymerization, and meanwhile, the combination of the main and auxiliary antioxidants can quickly decompose peroxide and hydroperoxide at the later stage of processing; compared with the prior art, the whiteness and thermal stability of PVC in the early stage are good, the anti-yellowing effect and the long-term aging resistance of PVC in the later processing are more emphasized, the performance of PVC in the dynamic thermal stability is improved, and the volume impedance and the initial coloring are low.

Conventionally, for anaerobically curable compositions that were used in assembly of a stacked steel sheet, fast curability was required for the efficiency of productivity. Recently, diversification of assembly methods has made not only curing acceleration by a primer but also curing acceleration by heating possible. In order for improvement in durability of stacked steel sheets, there has been a demand for improvement in shear adhesive strength and peeling adhesive strength of anaerobically curable compositions. The present invention relates to an anaerobically curable composition containing the following components (A) to (D): component (A): (meth)acryloyl compound, component (B): hydroperoxide, component (C): saccharin, and component (D): sodium salt, potassium salt or calcium salt of saccharin.

The invention relates to the technical field of anti-aging agents, and discloses a preparation method of an anti-aging agent and application of the anti-aging agent in plastics, the anti-aging agent contains styrene groups, and can be well fused and grafted with polyolefin such as polypropylene under the action of an initiator dibenzoyl peroxide or dicumyl peroxide, so that the anti-aging agent has a good anti-aging effect. The influence on the mechanical strength of the polyolefin plastic is very small, and the problem that physical blending can cause great influence on the mechanical strength and the use performance of the plastic can be avoided. Meanwhile, a phenol triazine structure contained in the anti-aging agent has a unique ultraviolet absorption effect, and a hindered amine structure is contained, so that the photo-oxygen degradation reaction of the polyolefin plastic can be inhibited through multiple ways of capturing free radicals and decomposing hydroperoxide, and through an accelerated aging experiment of xenon lamp irradiation, the plastic keeps very high tensile strength, and the anti-aging effect is good. And excellent thermo-oxidative aging resistance and ultraviolet radiation aging resistance are shown.

Systems and methods for treating an object, in particular, for disinfecting and / or drying objects and / or surfaces are provided. One or more of an air delivery system, an electromagnetic emitter (e.g., a Far ultraviolet (UV) light source), and / or an air treatment device (e.g., a gaseous hydrogen-peroxide generator) may be used to condition ambient air to treat a surface or container for use (e.g., prior to filling the container, applying a surfactant, etc.). An ionizer may be employed with one or more of the emitter or air treatment device to additionally remove static from air within or provided to a treatment area.

A free-radical polymerizable dental material comprising a combination of a hydroperoxide and a thiourea derivative according to the following formula (I) as an initiator system for free-radical polymerization: wherein R is absent or is an aromatic, aliphatic, linear or branched C1-C 50 a hydrocarbon group which may be interrupted by one or more ether, thioether, ester, amide or urethane groups; PG is a free-radically polymerizable (meth)acrylate, (meth)acrylamide or vinyl group; and n is 1, 2 or 3.

The present application provides thiamine compounds shown in formula (I) and application thereof. The thiamine compounds of the present application can be used for preparing polyolefin antioxidants. The thiamine compounds of the present application introduce sulfide bonds in aryl secondary amine, so that the antioxidant contains naphthylamine groups of primary antioxidants and sulfide groups of auxiliary antioxidants, which not only can terminate free radicals by providing hydrogen protons, but also can react with hydroperoxides, so as to achieve the dual effects of primary and auxiliary antioxidants, and thus the antioxidant effect is significantly enhanced.

The invention relates to fluorocarbon chain modified cobalt nickel-aluminum hydrotalcite and a preparation method and application thereof, ions in the cobalt nickel-aluminum hydrotalcite are Co < 2 + >, Ni < 2 + > and Al < 3 + > respectively, and a fluorocarbon chain is prepared from at least one compound in formulas (I)-(III); comprising the following steps: S1, stirring and mixing a Co < 2 + > aqueous solution, a Ni < 2 + > aqueous solution, an Al < 3 + > aqueous solution and a urea aqueous solution in an inert gas atmosphere, then carrying out a hydrothermal reaction, and after the reaction is finished, carrying out post-treatment to obtain cobalt nickel-aluminum hydrotalcite; and S2, dispersing the cobalt nickel-aluminum hydrotalcite in anhydrous toluene, reacting the cobalt nickel-aluminum hydrotalcite with at least one compound in formulas (I)-(III) under the action of triethylamine in an inert gas atmosphere, and after the reaction is finished, performing post-treatment to obtain fluorocarbon chain modified cobalt nickel-aluminum hydrotalcite, the hydrotalcite is applied to preparation of naphthenic alcohol and naphthenic ketone by catalyzing partial oxidation of naphthenic hydrocarbon. The method has the advantages of high selectivity, high product yield, low content of naphthenic hydroperoxide in the reaction process, and high operation safety.

A titanium-containing silicon oxide capable of producing an epoxide in a high yield when used as a catalyst in a reaction for producing an epoxide from an olefin and a hydroperoxide, in which the titanium-containing silicon oxide satisfies all conditions 1 to 5: Condition 1: an average pore diameter is 10 or more; condition 2: 80% or more of the total pore volume has a pore diameter of 5-200; condition 3: the total pore volume is 0.2 cm3 / g or more; condition 4: the D50 of the titanium-containing silicon oxide is from 1.00 mm to 3.30 mm. And Condition 5: the (D90-D10) / D50 of the titanium-containing silicon oxide is 0.35-1.00.

A method for producing oxidized forms of waxes (polar waxes) or polyketones containing oxygen functional groups from polypropylene (PP), polystyrene (PS), and / or polyethylene (PE), which can be used as lubricants, adhesives, coating agents, etc. In one or more examples, hydroperoxides were used as oxidants to cleave C-C and C-H bonds at mild temperatures (e.g., 150°C). C-C bond cleavage reduces the number average molecular weight (M n ) is reduced to 500-5000 g / mol. This method has been successfully applied to the conversion of post-consumer polyolefin waste to produce polar waxes or polyketones.

The present application provides a catalyst for hydrogen peroxide acidolysis, a preparation method and application thereof, which comprises a solid catalyst modified by a strong acid and a salt aqueous solution; wherein the solid catalyst is at least one selected from natural white clay, activated white clay, bentonite or diatomite, and the salt aqueous solution contains at least one inorganic salt selected from sodium salt, potassium salt, magnesium salt and calcium salt. When the catalyst of the present application is used for hydrogen peroxide acidolysis, it has high hydrogen peroxide conversion rate and product selectivity.

The present invention relates to processes for preparing propylene oxide, comprising reaction of propene with ethylbenzene hydroperoxide in the presence of a catalyst, as well as to catalysts employed in such processes and to methods for their manufacture. The catalysts of the invention are prepared in a process comprising sol-gel-synthesis of catalyst hydrogel-precursor, drying of catalyst hydrogel precursor, calcining of dried catalyst hydrogel-precursor, and optionally hydrophobizing the calcined catalyst hydrogel-precursor. The catalysts of the invention comprise amorphous titanium doped silica comprising pentahedrally coordinated titanium species.

The present disclosure relates to a process for the preparation of a tertiary alkyl organic peroxide comprising: a) reacting in a first condensation stage a component comprising at least one tertiary alcohol group with a compound comprising at least one tertiary hydroperoxide function in the presence of a catalyst and optionally a co-catalyst, b) separating the aqueous phase from the organic phase in a dehydration stage, and c) separating the aqueous phase from the organic phase in a second condensation stage in the presence of a catalyst and optionally a co-catalyst to form a mixture comprising an organic phase and an aqueous phase, the organic phase comprising a tertiary alkyl organic peroxide. The component containing at least one tertiary alcohol group is further reacted with the compound containing at least one tertiary hydroperoxide group, the molar ratio between the compound containing at least one tertiary hydroperoxide functional group and the component containing at least one tertiary alcohol group being at least 3: 1 in the first condensation stage, and the molar ratio between the compound containing at least one tertiary hydroperoxide functional group and the component containing at least one tertiary alcohol group being at least 2: 1 in the second condensation stage. And wherein dehydration does not occur during the first condensation stage.

The invention relates to the technical field of high polymer materials, and discloses an anti-aging PP board and a preparation method thereof.The anti-aging PP board is prepared from, by weight, 60-80 parts of PP, 15-30 parts of glass fiber, 8-12 parts of nano calcium carbonate, 0.5-1 part of silane coupling agent, 2-5 parts of compatilizer, 5-8 parts of inorganic flame-retardant material, 0.5-2 parts of lubricant and 1-5 parts of modified anti-aging agent. And 0.5-4 parts of a modified flame retardant. The preparation of the modified anti-aging agent can effectively inhibit the aging phenomena of cracking, impact strength reduction and the like of the plate after long-term use by capturing free radicals and decomposing hydroperoxide; according to the preparation of the modified flame retardant, the combustion process is inhibited by generating non-combustible gas and generating free radicals, the flame retardance of the system is improved, and the modified flame retardant has the advantages of environmental friendliness, good compatibility, lasting flame retardance and the like.

The invention provides a high-temperature low-attenuation polypropylene insulating material and a preparation method thereof, and belongs to the field of high-molecular polymers. The polypropylene composite material comprises polypropylene and concentrated master batch, the concentrated master batch contains polypropylene, an antioxidant, a nucleating agent and white mineral oil. The antioxidant comprises a semi-hindered phenol (capturing free radicals), sulfur (decomposing hydroperoxide) and copper damage prevention (inhibiting catalytic oxidation of copper ions) composite system, the three antioxidants form a synergistic effect, and the thermal oxidation resistance of the material can be remarkably improved. According to the invention, the high-temperature low-attenuation polypropylene insulation material with high temperature resistance grade, low attenuation at high temperature and good extrusion moldability is prepared through a composite antioxidant system, nucleating agent regulation and control and a step-by-step granulation process; the cable especially meets the requirements for new energy automobile cables at present.

Process for the production of a peroxyester involving the reaction of an anhydride with an organic hydroperoxide, separation of the formed carboxylic acid, production of an anhydride from said carboxylic acid, and recycling of the anhydride within the process.

The invention relates to a fat-reducing satiety cocoa product and a preparation method thereof, and belongs to the technical field of cocoa products. Non-covalent bonds such as hydrogen bonds, hydrophobic bonds and the like are formed among the grease, xanthan gum and concentrated whey protein in the preparation raw materials, so that migration and crystal transformation of the grease can be delayed, and the frosting of the cocoa product is delayed. The raw materials also comprise tannic acid, on one hand, the tannic acid enhances the oxidation resistance of the grease, inhibits the grease from generating grease hydroperoxide and avoids a series of health problems caused by too high grease hydroperoxide, and on the other hand, the tannic acid cooperates with the xanthan gum, so that the thermal stability of the cocoa product can be enhanced. The invention also provides a preparation method of the cocoa product, the concentrated whey protein in the raw materials for preparing the cocoa product has excellent emulsifying performance, can hinder the tiny movement of grease molecules in the process of preparing the cocoa product from the prefabricated slurry and inhibit the recrystallization movement after grease migration, and has good anti-frosting performance.

The invention discloses an anti-aging fire hose lining material and a preparation method thereof. The anti-aging fire hose lining material comprises the following components in parts by mass: 50-60 parts of polypropylene; 25 to 35 parts of thermoplastic rubber; 0.2 to 0.5 part of an antioxidant; 12 to 18 parts of industrial white oil; 15 to 25 parts of a toughening agent; 0.05 to 0.2 part of a metal deactivator; and 0.5-1 part of an anti-hydrolysis agent. According to the present invention, the material has significant anti-aging performance, and the aging process of the material is inhibited from different mechanisms by adding a variety of anti-aging components such as the antioxidant, the metal deactivator, the anti-hydrolysis agent and the like; particularly, multiple antioxidants cooperate, amines, thioesters and organophosphorus are precisely compounded, free radicals are efficiently captured, hydroperoxide is decomposed, aging is resisted from the source, and the service life of the water hose is prolonged. Due to the special proportion of the materials, the light-weight effect is achieved.

In some examples of the disclosed technology, a method comprises etching titanium dioxide selectively in the presence of aluminium oxide using an etchant. The etchant can be an aqueous solution of a base and a hydroperoxide. In some examples, the etchant is effective for removing titanium dioxide without destroying an aluminium oxide layer. Examples of an etchant for etching titanium dioxide are disclosed, where the etchant is an aqueous solution of ammonia and hydrogen peroxide, and in some examples the molar ratio of the ammonia to the hydrogen peroxide is in the range 1:34 to 1:38. Methods of etching titanium dioxide disclosed herein can be used to fabricate semiconductor-superconductor hybrid devices.

The present disclosure presents hydrogel compositions for use in the treatment of an ocular disorder (e.g., a retinal disease) and methods of treating an ocular disorder in a subject in need thereof with the hydrogel compositions. The hydrogel compositions can include hydroxyphenylpropionic acid (gelatin-HPA), hyaluronic acid-tyramine (HA-Tyr), a catalyzer (e.g., horseradish peroxidase (HRP)), a cell, a crosslinker (e.g., hydrogen peroxide), or any combination thereof. The methods include administering a therapeutically effective amount of a composition into an eye of the subject, wherein the composition includes any of the hydrogel compositions of the disclosure.

The present invention relates to chemical and biological warfare agent decontaminating compositions and methods for using the same to decontaminate animal skin and wounds thereon exposed to the agents. The compositions may comprise a peracid, a hydroperoxide, and a peroxyacid.

The present invention discloses a low-temperature stable organic peroxide emulsion and a safe preparation method thereof. The emulsion comprises diisobutyryl peroxide, a hydroperoxide stabilizer, an organic solvent containing 2,2,4-trimethyl-1,3-pentanediol diisobutyrate, and an emulsifying / dispersing agent. By means of a method of coupling low-temperature high-shear dispersion with cyclic emulsification and combining real-time monitoring of combustible gas / oxygen / smoke, the problems of freezing of the emulsion under extremely cold conditions (-40°C) and the decomposition risk during the preparation process are solved. The obtained emulsion has significantly improved storage stability (≥85 days), low viscosity and excellent fluidity, and is suitable for industrial production.

The present invention relates to a process for the cold radical emulsion polymerization of a monomer mixture of 1,3-butadiene and a (meth)acrylate containing 1,3-butadiene and an alkyl methacrylate, in which process the polymerization reaction is initiated by a redox system comprising an organic hydroperoxide and an iron (II) salt in the presence of a mercaptan as transfer agent. The relative amounts of initiator, transfer agent and monomers result in a macrostructure characterized by a novel compromise between the number-average molar mass, Mn, and the dispersity, Đ. This compromise makes it possible to further improve the rolling resistance performance of a tire comprising a rubber composition comprising an elastomer prepared according to the process according to the invention.

Rate of rancid flavor development in oil-based sauces and dressings can be slowed down by addition of a mixture containing sequestering agents for dissolved oxygen and heavy metal ions that are derived from vinegar and fruit juices. The types and proportions of the components of the mixture are chosen to promote a balance of flavor and color neutrality and adequacy of sequestering both heavy metal ions and dissolved oxygen. The mixture is effective in retarding development of rancid flavor moieties of hydroperoxides and hexanal, similar to a commonly-used chemical sequestrant, ethylene diamine tetra acetate (EDTA).

The invention discloses a thioether polyphenol acrylate intramolecular composite antioxidant, a preparation method thereof and an ABS (Acrylonitrile Butadiene Styrene) resin material, the thioether polyphenol acrylate intramolecular composite antioxidant has a structure as shown in a formula (1), a formula (2) or a formula (3): # imgabs 0 # imgabs 1 #. The antioxidant not only contains phenolic hydroxyl groups which play a role in inactivating peroxidation free radicals in hindered phenol antioxidants, but also contains thioether groups which play a role in decomposing hydroperoxides in sulfo antioxidants, and monoacrylate with the function of a carbon free radical capturing agent is also contained, so that three effects in molecules can be integrated.

The present invention relates to a method for purifying a mixture containing at least one alkyl hydroperoxide, preferably tert-butyl hydroperoxide or tert-amyl hydroperoxide, and at least one corresponding dialkyl hydroperoxide, said method comprising at least one step of extraction with water and at least one separation step which is carried out within the aqueous phase, obtained following the extraction step, in order to recover an aqueous solution which is rich in alkyl hydroperoxide. The invention also relates to an aqueous composition which is rich in alkyl hydroperoxide and contains at least 0.1% by weight of dialkyl peroxide in relation to the total weight of the composition.

The present invention relates to a method for the cold emulsion radical polymerisation of a monomer mixture of 1,3-butadiene and of a (meth)acrylate containing 1,3-butadiene and an alkyl methacrylate, in which the polymerisation reaction is initiated by a redox system comprising an organic hydroperoxide and an iron(II) salt, in the presence of a mercaptan as a transfer agent. The relative amounts of initiator, transfer agent and monomers result in a macrostructure characterised by a novel trade-off between the number-average molar mass, Mn, and the dispersity, Đ. This trade-off further enhances the rolling resistance performance of a tyre comprising a rubber composition that comprises an elastomer prepared according to the method of the invention.

The invention relates to the technical field of organic synthesis, in particular to a preparation method of dialkyl peroxide, which comprises the following steps: mixing an alcohol compound, alkyl hydroperoxide, an acid catalyst and an entrainer, and carrying out condensation reaction; wherein the entrainer is an acid capable of forming a highest azeotrope with water, and the addition amount of the entrainer is obtained according to the lowest water content which can be borne by a reaction system; water generated in the condensation reaction is evaporated out, and when the pH value of the evaporated-out product is smaller than a preset value, the reaction is stopped. According to the preparation method of the dialkyl peroxide, the reaction endpoint can be accurately judged, and the reaction safety is improved.

The invention relates to a preparation method of a bio-based 1, 5-pentamethylene diisocyanate product with yellowing resistance and high stability. A synergistic composite stable system composed of an efficient main antioxidant, an auxiliary antioxidant and a plurality of ultraviolet absorbents / light stabilizers in a scientific proportion is constructed. Wherein the main antioxidant is mainly used for capturing free radicals and blocking an oxidation chain reaction; the auxiliary antioxidant decomposes hydroperoxide to inhibit the hydroperoxide from further initiating the degradation of the material; the ultraviolet stabilizer effectively delays the color change process caused by illumination by absorbing or quenching excited state energy. The preparation method disclosed by the invention has the advantages of high process compatibility, easiness in acquisition of auxiliaries, simple compounding and post-treatment steps and convenience in large-scale popularization; the environmental protection property is outstanding, the yellowing resistance and the storage stability of the product are greatly improved, the normal-temperature closed storage period is prolonged to 6 months or above, the NCO content retention rate is greater than or equal to 96%, and the storage and transportation cost is reduced; the influence of thermal oxidation and photodegradation is resisted, and a complex application environment is adapted.