20 results about "Ethylene urea" patented technology

The object of the present invention is to provide a polyacetal resin composition that can suppress the amount of formaldehyde released from a molded part and exhibits excellent impact strength and excellent tensile creep properties under high temperatures and high stresses. The polyacetal resin composition comprises, based on 100 parts by mass (A) polyacetal resin, 0.05 to 0.25 parts by mass (B) ethylene urea, and 0.0005 to 0.2 parts by mass (C) boron nitride.

The invention discloses a continuous production process of 1, 3-dimethyl-2-imidazolinone, and relates to the technical field of chemical processes, the process takes ethylene urea, formic acid, paraformaldehyde and water as raw materials, and the whole-process continuous production is realized through the steps of material preparation, batching, continuous reaction and post-treatment. The method is characterized in that water is used as a solvent, the reaction temperature is 150-250 DEG C, the pressure is 1-8 MPa, and the purity of the rectified product is greater than or equal to 99.5%. The method overcomes the defects of insufficient reaction and high cost of the existing intermittent process, has the advantages of high conversion rate, few impurities, few three wastes, easiness in automation and the like, and is suitable for industrial large-scale production.

Filter medium (10), in particular for an air filter, in particular a cabin air filter or for a fuel cell, comprising at least three active layers: - an outer catalytic active layer (12) comprising catalytic activated carbon particles (12a) for removing acidic (pH < 7) and / or hydrophilic gases, - a second, middle active layer (14) comprising phosphoric acid-impregnated activated carbon particles (14a) for the removal of ammonia, which is arranged downstream of the outer catalytic active layer (12), - a third, outer active layer (16) comprising activated carbon particles (16a) impregnated with ethylene urea and phosphoric acid for the removal of ammonia and formaldehyde, wherein the three active layers (12,14,16) are different from each other, and wherein the catalytic activated carbon particles (12a,14a) have an electronic structure of the carbon on the surface that has been altered by an activation process and wherein the impregnated activated carbon particles (14a,16a) have an impregnation applied to the activated carbon particles (14a,16a).

The invention relates to the technical field of carbon materials, and particularly discloses a porous carbon material and a preparation method and application thereof. Cheap and easily available coal tar is used as a raw material, phenol light fractions in the coal tar are directionally removed through reduced pressure distillation, heavy components are enriched, and then the enriched heavy components are sequentially subjected to processes such as pre-oxidation, formaldehyde-ethylene urea crosslinking, Al-doped amino grafted nano boric oxide catalytic carbonization and CO2 gradient activation to obtain the porous carbon material. The porous carbon material has high conductivity, pore size distribution meeting CVD silicon deposition requirements and a stable carbon skeleton, the porous carbon material with excellent comprehensive performance is provided for the sodium ion battery, high-value utilization of the coal tar is achieved, and the market prospect is wide.

The invention relates to the field of chemical industry, and discloses a method for synthesizing ethylene urea through cyclization dehydration of ethylenediamine carbamate, which comprises the following steps: 1) mixing ethylenediamine carbamate, 1, 3-dimethyl-2-imidazolinone and a tin-titanium-based composite catalyst for reaction; 2) centrifuging to obtain a solid phase which is the tin-titanium-based composite catalyst and ethylenediamine carbamate; the obtained liquid phase is 1, 3-dimethyl-2-imidazolinone, ethylene urea and water; 3) washing and filtering the solid phase to obtain a tin-titanium-based composite catalyst solid and an ethylenediamine carbamate aqueous solution, and drying the aqueous solution to obtain ethylenediamine carbamate; 4, the liquid phase is extracted and separated through diethyl ether, 1, 3-dimethyl-2-imidazolinone is obtained after diethyl ether is removed through evaporation, ethylene urea is obtained after ethylene urea and water are obtained in a water phase, and the method has the advantages of being high in atom economy, mild in reaction condition, low in energy consumption and high in yield.

Provided is a processing method for inkjet printing, which can suppress bleeding and decrease in water absorbability at the same time when performing inkjet printing on a fabric having high water absorbability, and which can suppress cross-color. The present invention relates to a treatment method for ink jet textile printing, in which, when printing is performed by applying a recording ink containing a reactive dye to a fabric, a treatment liquid is applied to the fabric, the diameter of the fabric after 5 seconds when 0.3 g of water is dripped onto the fabric is less than 15 mm, the treatment liquid contains urea or ethylene urea, and the content of a paste contained in the treatment liquid is 1 mass% or less.

This invention discloses a formaldehyde-removing coating, a UV formaldehyde-removing resin, its preparation raw materials, and a preparation method thereof. The UV formaldehyde-removing resin contains a siloxane structure and an active methylene structure with formaldehyde-removing function or a cyclovinylene structure containing a secondary amine group. The preparation method of the UV formaldehyde-removing resin includes: mixing a first raw material with a siloxane structure with a second raw material, the second raw material comprising an active methylene group with formaldehyde-removing function and / or a cyclovinylene containing a secondary amine group; introducing the active methylene group with formaldehyde-removing function or the cyclovinylene containing a secondary amine group into the oligomer resin molecular chain with photocuring function via transesterification or isocyanate functional groups to obtain the UV formaldehyde-removing resin. The formaldehyde-removing coating, UV formaldehyde-removing resin, its preparation raw materials, and the preparation method proposed in this invention can improve the formaldehyde removal efficiency of UV formaldehyde-removing resin.

A polyoxymethylene polymer composition is disclosed, comprising a formaldehyde stabilizer package. This formaldehyde stabilizer package, containing at least two emission control agents, significantly and unexpectedly reduces formaldehyde emissions. The formaldehyde stabilizer package includes at least two emission control agents selected from benzoguanamine compounds, hydantoin, substituted hydantoin, amino acids, and alkylene ureas such as ethylene urea.

The application provides a urea-formaldehyde resin renovation regeneration method, a renovated urea-formaldehyde resin and application thereof, and can be applied to the technical field of polymer material recycling and reuse. The method comprises the following steps: obtaining detection indexes of urea-formaldehyde resin to be renovated, the detection indexes comprising at least one of viscosity, pH value, free formaldehyde content and solid content; according to the detection indexes, adjusting agent is mixed with the urea-formaldehyde resin to be renovated under predetermined temperature and stirring conditions, and aging is performed for a predetermined time; wherein the adjusting agent comprises at least one of formaldehyde capturing agent, viscosity adjusting agent, pH value adjusting agent and curing accelerator, and the formaldehyde capturing agent comprises at least one of urea, melamine, thiourea or ethylene urea.

According to the invention, methacrylamide ethyl ethylene urea is added into the finishing paint mainly comprising the water-based hydroxyl acrylic emulsion, so that the adhesive force of a coating film can be obviously improved. Researches show that along with the increase of the dosage of methacrylamide ethyl ethylene urea, the adhesive force of a coating film is firstly increased and then tends to be gentle, however, excessive methacrylamide ethyl ethylene urea can cause the reduction of the corrosion resistance of the coating film. Therefore, in practice, based on 100 parts by weight of the water-based hydroxyl acrylic emulsion, the dosage of the methacrylamide ethyl ethylene urea needs to be controlled to be 6.2-18.9 parts by weight.

The invention relates to a polyacetal resin composition. The purpose of the present invention is to provide a polyacetal resin composition which is capable of suppressing the amount of formaldehyde released from a molded article, and which has excellent impact resistance and tensile creep characteristics under high temperature and high stress. Provided is a polyacetal resin composition in which, with respect to 100 parts by mass of (A) a polyacetal resin, the polyacetal resin composition contains (B) 0.05 to 0.25 parts by mass of ethylene urea and (C) 0.0005 to 0.2 parts by mass of boron nitride.

Ethylene urea used as a stabiliser of phenolic resins. The phenolic resins are preferably resole reins and the ethylene urea stabilises the viscosity, scavenges formaldehyde, and reduces reactivity of

The invention belongs to the technical field of memory foam preparation, and particularly relates to a slow-rebound memory foam preparation method and system. The preparation method comprises the following steps: (1) mixing dimethylol dihydroxy ethylene urea, dimethylol ethylene urea resin, polyether glycol, isophorone diisocyanate and acetone to obtain a first mixed solution; (2) mixing sodium alginate powder, nano nickel, nano titanium dioxide and ethylene glycol to obtain a second mixed solution; (3) mixing polylactic acid and acetone, heating at 180-200 DEG C, uniformly stirring, adding the first mixed solution, the second mixed solution, polyurethane powder and a penetrant T30, continuously uniformly stirring at 180-200 DEG C, homogenizing at 180-200 DEG C for 30-40 minutes, adding sodium bicarbonate, ammonium carbonate and dimorpholinyl diethyl ether, foaming, pouring into a mold, cooling and demolding; and (4) padding the demolded memory foam in silicone oil, and drying at 60-70 DEG C to obtain the slow-rebound memory foam. The prepared memory foam is not prone to deformation and good in air permeability.

The present invention relates to a functionalized poly(meth)acrylate, wherein the functionalized poly(meth)acrylate comprises of from 50 to 99 parts by weight of units based on methyl methacrylate, of from 0.1 to 5 parts by weight of units based on n-butyl acrylate, of from 0 to 30 parts by weight, preferably 15 to 25 party by weight of units based on n-butyl methacrylate, and of from 0.5 to 5 parts by weight, preferably 1 to 2 parts by weight of units based on functionalized methacrylates selected from N-(2-Methacryloyloxyethyl) ethylene urea, 2,2,6,6-Tetramethyl-4-piperidyl methacrylate, and glycerine carbonate methacrylate, based on the total weight of the units the functionalized poly(meth)acrylate is based on, to a blend containing the functionalized poly(meth)acrylate and at least two different polymers, and to a process for producing such blends and to the use thereof.

The present application relates to the technical field of carbon material, and particularly discloses a kind of porous carbon material and its preparation method and application.The present application uses cheap and easily obtained coal tar as raw material, removes the phenolic light fraction in it by vacuum distillation, realizes the enrichment of heavy component, then the enriched heavy component is sequentially subjected to pre-oxidation, formaldehyde-ethylene urea crosslinking, Al-doped amino grafted nano boron oxide catalytic carbonization, CO2 gradient activation process, and porous carbon material is obtained.The porous carbon material has high conductivity, pore size distribution meeting the requirements of CVD silicon deposition, and stable carbon skeleton, providing a kind of porous carbon material with excellent comprehensive performance for sodium-ion battery, and realizing high-value utilization of coal tar, with broad market prospect.

The invention belongs to the technical field of reinforcing materials for coal and rock masses, and particularly relates to a low-temperature double-liquid reinforcing material for the coal and rock masses and a preparation method of the low-temperature double-liquid reinforcing material. The low-temperature double-liquid reinforcing material for the coal and rock mass comprises a component A and a component B, the component A is prepared from the following components in parts by mass: 70 to 90 parts of melamine modified urea-formaldehyde resin, 5 to 10 parts of ammonia water, 0.2 to 0.6 part of an emulsifier, 0.1 to 0.6 part of a de-foaming agent, 0.5 to 2 parts of ethylene urea, 0.5 to 2 parts of organic carboxylic ester, 0.3 to 0.9 part of nano silicon dioxide, 0.2 to 1.2 parts of a silane coupling agent and 5 to 15 parts of activated superfine fly ash; the component B comprises 20-50 parts of a phosphoric acid solution, 50-70 parts of water and 3-7 parts of ammonium chloride. The low-temperature double-liquid reinforcing material for the coal and rock mass can be rapidly cured under the low-temperature condition, has high compressive strength and is suitable for coal and rock mass reinforcing engineering under the complex environment of a coal mine.

The invention discloses a continuous production process of ethylene urea, and relates to the technical field of chemical processes, the process comprises the steps of material preparation, proportioning, continuous reaction and centrifugal drying, one or more of raw materials ethylene diamine, urea, an organic solvent and a polar solvent are proportioned according to a specific molar ratio, the continuous reaction is performed at the temperature of 150-250 DEG C and under the pressure of 1-8 MPa, and the ethylene urea is obtained. And finally, centrifugally drying to obtain a high-purity ethylene urea product. The method solves the problems of insufficient reaction, high cost and incapability of continuation in the prior art, and has the advantages of high product yield, few impurities, environmental protection and energy conservation.

The present invention relates to fungicidal compositions comprising at least one compound selected from the group consisting (I-1) methyl N-[[5-[1-(2,6-difluoro-4-isopropyl-phenyl)pyrazol- 3-yl]-2-methyl-phenyl]methyl]carbamate, (I-2) methyl N-[[5-[1-(4-cyclopropyl-2,6-difluoro- phenyl)pyrazol-3-yl]-2-methyl-phenyl]methyl]carbamate, (I-3) methyl N-[[5-[1-(4-chloro-2,6- difluoro-phenyl)pyrazol-3-yl]-2-methyl-phenyl]methyl]carbamate, (I-4) methyl N-[[5-[1-[2,6- difluoro-4-(trifluoromethyl)phenyl]pyrazol-3-yl]-2-methyl-phenyl]methyl]carbamate, and as active component 2) at least one compound, or an N-oxide, or an agriculturally useful salt thereof, selected from the group consisting of (II-1) flumetylsulfurim, (II-2) feneptamidoquin, (II-3) 3-[3-(3- chloro-2-fluoro-phenoxy)-6-methyl-pyridazin-4-yl]-5-[(2-chloro-4-methyl-phenyl)methyl]-5,6- dihydro-4H-1,2,4-oxadiazine, wherein the weight ratio of compound I to compound II is from 10:1 to 1:10. The invention also relates to an agrochemical composition comprising the composition and a solvent of solid carrier. Further, the invention relates to a non-therapeutic use of the inventive compositions controlling phytopathogenic harmful fungi.

The invention discloses a preparation method of a formaldehyde-removing non-woven fabric, which comprises the following steps: 1) preparing a formaldehyde-removing solution from the following components in percentage by mass: 18-24% of a formaldehyde-removing agent, 1.2-1.6% of a dispersing agent, 0.3-0.8% of a stabilizer, 0.5-0.7% of an adhesive and the balance of water; the formaldehyde removal agent is prepared from the following components in parts by weight: 7 to 9 parts of ethylene urea, 4 to 6 parts of a polyaspartic acid-urea grafted copolymer and 2 to 4 parts of nitrogen-doped straw-based carbon quantum dots; (2) the non-woven fabric passes through an aldehyde removal liquid tank body; 3) extruding the non-woven fabric full of the formaldehyde removal liquid through a roller to remove redundant formaldehyde removal liquid, and 4) drying the extruded non-woven fabric in a drying oven. Ethylene urea, a polyaspartic acid-urea grafted copolymer and nitrogen-doped straw-based carbon quantum dots are compounded, so that the formaldehyde removal agent has the advantages of low cost, reduction of toxicity of the formaldehyde removal agent and high long-term formaldehyde removal efficiency.

The application discloses a kind of polyvinyl alcohol photo-thermal fiber prepared by melt spinning and its preparation method and application, which comprises the following steps: dopamine hydrochloride is stirred and dissolved in water to obtain dopamine hydrochloride aqueous solution, dopamine hydrochloride aqueous solution is mixed with polyvinyl alcohol and ethylene urea, and polydopamine / polyvinyl alcohol is generated by static swelling and plasticizing, melt spinning is carried out to prepare polyvinyl alcohol composite photo-thermal fiber.The application is a kind of polyvinyl alcohol photo-thermal fiber prepared by melt spinning, which is simple in process, does not need coagulation bath, has small pollution, low cost, and the prepared product has excellent photo-thermal performance, and the photo-thermal effect can be adjusted according to needs.