66results about How to "Prevent riots" patented technology

The invention relates to a preparation method of a fiber with high water absorption, which is a method for preparing the fiber with high water absorption by a post-crosslinking agent. According to the preparation method, the fiber with high water absorption is prepared from acrylic acid (AA) and acrylamide (AM) which are partly neutralized and taken as polymerized monomers through the steps of: blending the polymerized monomers with polyving akohol (PVA), initiating by potassium persulfate (KPS), blending and polymerizing in an aqueous solution, adding a dialdehyde solution to obtain a mixed solution serving as a post-crosslinking agent solution, mixing to be uniform and defoaming to obtain a spinning stock solution; dry-wet spinning the spinning stock solution to form a nascent fiber; and heat-treating the nascent fiber at a certain temperature to generate a crosslinking reaction, thereby forming the three-dimensional net-structured fiber with high water absorption. According to the preparation method, the implosion phenomenon which easily occurs during polymerization of the traditional polymer solution with high water absorption is avoided, the preparation technology is simple and safe, the production cost is reduced, and the production efficiency is increased; and the obtained water-absorbing fiber has high and controllable water adsorption, thermostability, capability of being repeatedly used, and long residual action.

This invention relates to a method to prepare superabsorbent polycrylic acid (or its salt) resin by verse-suspension polymerization, with cyclohexane adopted as solvent, crylic acid as monomers, K2S208 as initiators and N, N'-methylenebisacrylamide as cross-linking reagent. It has the characteristics that the dispersants for verse-suspension in the reaction system can be monoglyceryl ester or octadecyl phosphatide/span-60 complex or octadecyl phosphatide/monogylceryl ester complex and the dispersants weigh 2~20% of crylic acid monomers. The superabsorbent polycrylic acid resin prepared in this invention is white or light yellow visible impurity-free gel solid or solid particles, with sufficient gel strength, a water absorption of over 600ml/g and a salt solution absorption of over 70ml/g.

The invention discloses a phyllosilicate modified organic silicon grafted polyether polyurethane elastomer and a preparation method and application thereof. The phyllosilicate modified organic silicon grafted polyether polyurethane elastomer comprises the following components in parts by mass: 100 parts of polyether polyurethane prepolymers, 5-100 parts of organic silicon grafted polyether polyurethane prepolymers, 1-40 parts of polyether polyol, 0.5-15 parts of organic modified phyllosilicate, 0-5 parts of chain extenders, 0.1-2 parts of defoaming agents and 2-15 parts of curing agents. The phyllosilicate modified organic silicon grafted polyether polyurethane elastomer disclosed by the invention has multiple properties, namely excellent surface property, heat resistance, mechanical property, abrasion resistance, oil resistance, solvent resistance, radiation resistance, electrical insulation and the like, through the integrated complementation of excellent properties of the phyllosilicate, organic silicon and polyurethane. The preparation method of the phyllosilicate modified organic silicon grafted polyether polyurethane elastomer, which is disclosed by the invention, has the advantages of simpleness, easiness for reaction condition control, low-cost raw materials, low energy consumption, no environment pollution and suitability for industrialized production.

The invention provides a synthesis method of inverse emulsion of a modified polyacrylamide flocculating agent, and in particular relates to a polymerization method of anion modified polyacrylamide inverse emulsion having high solid content and high molecular weight. A method for oxidizing and reducing an initiator from paramisansodium (4-MASANa) and ammonium persulfate-sodium hydrogen sulphite by feeding the third monomer, namely methacrylamide, is adopted; the temperature change in the polymerization reaction is effectively controlled; the high molecular weight of an emulsion product is obtained; furthermore, because of containing a salicylic acid functional group, fine particles and metal ions in suspension can be well absorbed strongly; the flocculating effect and the clarity of the suspension are increased; by means of evaporating and concentrating in vacuum at high pressure in a rotating manner, the solid content of the modified polyacrylamide inverse emulsion products is increased; a compound interface membrane can be generated by compounding the used compound emulsifiers, namely methyl glucoside sesquialter stearate and propylene glycol monostearate, in a certain proportion; and the long-term steady preservation of inverse emulsion under the condition of high solid content can be effectively realized.

The invention belongs to the field of polymer materials and particularly relates to an organic silicon/montmorillonite composite modified polyester-type polyurethane elastomer as well as a preparation method and an application thereof. The polyurethane elastomer comprises the following components: 100 parts by mass of polyester-type polyurethane prepolymer, 0.5-100 parts by mass of isocyanate-terminated polydimethylsiloxane, 1-40 parts by mass of polyester polyol, 0.5-15 parts by mass of organic montmorillonite, 0.1-1.5 parts by mass of a defoaming agent, 0-5 parts by mass of a chain extender and 2-15 parts by mass of a curing agent. According to the polyurethane elastomer, since the polyurethane is jointly modified by virtue of organic silicon and montmorillonite, the polyurethane elastomer integrates the excellent performances of organic silicon, montmorillonite and polyurethane and thus the material has a plurality of performances, such as excellent surface property, heat resistance and good mechanical properties.

The invention provides a preparation technique of high-purity hydroxyethyl methacrylate. A rectification process is added in a purification process; a polymerization inhibitor is replenished through a spraying way in a phase transformation process of the rectification process; meanwhile, the vacuum degree and the working temperature of a tower top are controlled; the flash polymerization, in a rectifying tower, of the hydroxyethyl methacrylate is avoided, so as to achieve the purposes of being stable in operation, being capable of effectively preventing polymerization and improving product quality, thereby improving the purity of a hydroxyethyl methacrylate product.

The invention discloses an organosilicone/laminated silicate compound modified polyether polyurethane elastomer as well as a preparation method and an application thereof. The elastomer is prepared from the following components in parts by mass: 100 parts of a polyether polyurethane prepolymer, 0.5-100 parts of isocyanate group-terminated polydimethylsiloxane, 1-40 parts of polyether polyol, 0.5-15 parts of organically modified laminated silicate, 0.1-1.5 parts of a defoamer, 0-5 parts of a chain extender and 2-15 parts of a curing agent. By adopting the organosilicone/laminated silicate compound modified polyether polyurethane elastomer, excellent performances of organosilicone and laminated silicate can be integrated to supplement the defects on the performance of polyurethane, so that various performances such as surface properties, mechanical properties and heat resistance of the polyurethane elastomer are improved. The polyurethane elastomer disclosed by the invention is simple in preparation method, wide in source of raw materials, low in energy consumption, free from environmental pollution and suitable for industrial production, and the process conditions are easy to control.

The invention discloses a technology for preparing high-purity 2-hydroxyethyl acrylate and relates to the field of 2-hydroxyethyl acrylate preparation technologies. The technology has the advantages that a rectification process is added during purification, a polymerization inhibitor is supplemented through spraying during phase transformation in the rectification process, and the vacuum degree and the operating temperature of a tower top are controlled to eradicate flash polymerization of the 2-hydroxyethyl acrylate in a rectifying tower, so that operation stability is achieved, polymerization can be prevented effectively, the product quality is improved, and the purity of the 2-hydroxyethyl acrylate is enhanced.

The invention relates to a method preparing carboxylic butyronitrile-butadiene, its components comprise deionized water, emulsifying agents, molecular weight regulating agents, PH regulating agents, peroxodisulfate free initiator, butadiene monomers, acrylic nitrile, unsaturated carboxylic acid and unsaturated carboxylic ester, and the process comprises: adding the said components in a percentage by weight of 90-140 % of deionized water, 2.2-3.6 % of emulsifying agents, 0.5-1.5 % molecular weight regulating agents, 0.2-0.5 % of PH regulating agents and 0.3-1.1 % of peroxodisulfate free initiator into a polymeric reactor, then adding the butadiene monomers in a percentage of 52-58 % into the polymeric reactor and stirring to homogeneously mix, increasing the temperature to 40-50 Deg. C, and in the press of 0.3-0.5 MPa, continuously adding the mixture in a percentage of acrylic nitrile of 30-45 %, unsaturated carboxylic acid of 0.5-8 % and unsaturated carboxylic ester of 0.5-7.5 % using a dosage pump, the adding time lasts 6-12 h, and reacting to 2-4 h, then stop, degassing in a degassing tank and second degassing in a degassing column, regulating the latex treated from the degassing column by PH regulating agents to get the completed product.

The invention discloses a preparation method of a fluorine-containing soap-free emulsion repellent, and relates to the technical field of fluorine-containing emulsion repellent preparation, in particular to a preparation method of an environment-friendly fluorine-containing composite emulsion repellent. The preparation method of the fluorine-containing soap-free emulsion repellent comprises the following steps that (1) a fluorine-containing polymer, a water-soluble initiator and a polymer monomer react to form a mixed solution A; and (2) the mixed solution A, the polymer monomer B, an oil-soluble initiator and a polymerization inhibitor are added to a closed reaction kettle with a supercritical carbon dioxide medium for a polymerization reaction under nitrogen atmosphere protection, and supercritical extraction is adopted after reaction completion to form a product. The method overcomes the defect that a solvent is difficultly cleaned up; the obtained product is good in stability; the yield and the purity of the generated fluorine-containing polymer are significantly increased and improved; flash polymerization is avoided; and the production efficiency is improved.

The invention discloses a waterborne polyurethane emulsion with high stretch intensity and a preparation method thereof, and belongs to the technical field of paint. The waterborne polyurethane emulsion is prepared from the following raw materials in parts by weight: 30 to 90 parts of polyether polyol, 20 to 60 parts of polyisocyanate monomers, 3 to 13 parts of hydrophilic chain-extending agents,2 to 7 parts of salt-forming agents and 2 to 5 parts of quadrol. The invention also discloses a preparation method of the waterborne polyurethane emulsion with high stretch intensity. The method has the advantages that the polyether polyol, polyisocyanate monomers and hydrophilic chain-extending agents are gradually polymerized according to a certain proportion; under the chain expansion effect ofamine chain extenders, the anionic waterborne polyurethane emulsion is synthesized by a self-emulsification method. After the coating deformation film forming by the waterborne polyurethane emulsionwith high stretch intensity, the fracture intensity is higher than or equal to 45 MPa; the stretch resistance performance is good.

The invention belongs to the field of high polymer materials, and particularly relates to a montmorillonite-modified organic silicon graft polyester type polyurethane elastomer, and a preparation method and application thereof. The montmorillonite-modified organic silicon graft polyester type polyurethane elastomer comprises the following components in parts by mass: 100 parts of polyester type polyurethane prepolymer, 5-100 parts of organic silicon graft polyester type polyurethane prepolymer, 1-40 parts of polyester polyol, 0.5-15 parts of organic montmorillonite, 0-5 parts of chain extender, 0.1-2 parts of defoaming agent and 2-15 parts of curing agent. By using the montmorillonite and organic silicon for modifying the polyurethane, the advantages of the montmorillonite and organic silicon can be utilized to overcome the defects of the properties of the polyurethane, thereby adding excellent surface property, excellent heat resistance and favorable mechanical properties on the premise of keeping the original advantages of polyurethane.

The invention provides a manufacturing method of a high-strength heat-resistant organic glass fruit tray and relates to the field of glassware manufacturing. The manufacturing method comprises the following steps: weighing raw material and respectively weighing 700 to 800 parts of methyl methacrylate, 100 to 200 parts of methacrylatemethylacrylic polycyclic norborneol ester, 100 to 200 parts of N-substituted maleimide, 100 to 200 parts of methacrylamide, 40 to 60 parts of diethylene glycol dimethacrylateethyleneglycol dimethacrylate, 30 to 50 parts of propylene methacrylatemethylacrylic propylene carbonate, 30 to 50 parts of barium methylacrylate, 30 to 50 parts of montmorillonoid, 10 to 20 parts of dibutyl phthalate and 5 to 10 parts of 2,2'-Azobis(2-methylpropionitrile) for standby application; pre-polymerizing; performing secondarily secondary polymerizing and demoulding to obtain the organic glass fruit tray. The high-strength heat-resistant organic glass fruit tray disclosed by the invention has the advantages of high strength, good heat resistance, high transparency, simple producing and manufacturing technology and suitability for large-scale production.

The invention discloses a novel positive ion fixative preparing method. The novel positive ion fixative preparing method comprises the following steps that mixing is conducted by using dimethylamine as the main raw material, using hexamethylenediamine and dimethylamino-ethyl methylacrylate as auxiliary materials and using water as solvent, so that a mixed monomer is formed, wherein the molar ratio of the hexamethylendiamine to the dimethylamine is 0.01-0.5:1; epoxy chloropropane is dripped into the mixed monomer in the first step, so that a pre-polymerized monomer is formed, wherein the molar ratio of the epoxy chloropropane to the mixed monomer is 0.5-4:1, and the reaction temperature is controlled between 10 DEG C and 60 DEG C; after dripping is completed, the temperature is kept between 70 DEG C and 95 DEG C, and water is added and the reaction is ended when the viscosity is increased to 300-1000 cps; inorganic acid and water are added into an obtained product, and the pH value is adjusted to be 3-5. According to the novel positive ion fixative preparing method, the reaction condition is mild, the reaction yield is high, and sudden polymerization caused by direct polymerization is avoided; in addition, the electric charge density is higher than that of similar products in China and foreign counties by 10%, the production cost is low, and the method is suitable for large-scale industrial production.

The invention discloses an injection combination tool for use in dairy cattle farm, comprising a rapid disinfection device, a safety protection device, a dairy cattle fixing clamp and a push aid; whenan injection is prepared, a syringe is disinfected using the rapid disinfection device; before injection, the safety protection device is used for protecting a human body from injury, and the dairy cattle fixing clamp is used for fixing dairy cattle; a medicine is injected into the body of the dairy cattle via the push aid during injection. The injection combination tool for use in dairy cattle farm helps obtain a clean injector through the rapid disinfection device; the neck and abdomen of the dairy cattle are fixed through the dairy cattle fixing clamp during injection, and a worker is prevented from being kicked during injection; the worker is asked to wear the safety protection device, so that the worker can be protected from body injury during injection; finally, the injection can bequickly, stably and accurately pushed into the body of the dairy cattle by the aid of the push aid, and a needle is quickly pulled out at the time, so that the needle is prevented from being broken in the body of the dairy cattle due to its kicking.

The invention provides a preparation technique of high-purity hydroxyethyl acrylate. A rectification process is added in a purification process; a polymerization inhibitor is replenished through a spraying way in a phase transformation process of the rectification process; meanwhile, the vacuum degree and the working temperature of a tower top are controlled; the flash polymerization, in a rectifying tower, of hydroxyethyl acrylate is avoided, so as to achieve the purposes of being stable in operation, being capable of effectively preventing polymerization and improving product quality, thereby improving the purity of a hydroxyethyl acrylate product.

The invention discloses a fire-fighting hydroelectric special-purpose anti-seismic support and detection evacuation alarm system, which comprises an anti-seismic support body, a detector and a monitoring command center, the detector comprises an emergency lighting module, a first alarm module, a data acquisition module, a first processor, a control module, a first signal transmit-receive module and a first power supply management module. The detection evacuation alarm system can detect and analyze pipeline vibration through the detector installed on the anti-seismic support so as to judge whether an earthquake occurs or not, effective alarm information and escape guidance are rapidly provided for operators, the escape probability is increased, meanwhile, the system adopts comparison analysis of multiple sets of data, and the safety of the operators is improved. Meanwhile, the accuracy of a judgment result is ensured through comparison and analysis of multiple groups of data, so that earthquake misjudgment is reduced, and disturbance is avoided. The anti-seismic requirement of comprehensive fortification in the "Construction project anti-seismic management regulation" is met, the risk of earthquake disasters is greatly reduced, and the life and property safety of people is guaranteed.