32results about How to "Does not cause swelling" patented technology

Belonging to the technical field of pervaporation membrane separation, the invention relates to a preparation method of a modified polyurethane pervaporation phenol / water separation membrane. The preparation method of the membrane consists of: reacting hydroxyl-terminated polybutadiene with diisocyanate to obtain a terminated prepolymer, adding diamine and cyclodextrin as a chain extender for chain extension, and taking N, N-dimethyl acetamide as a solvent to obtain a modified polyurethane solution, carrying out membrane casting on the solution on a polyfluortetraethylene plate, and conducting curing at room temperature for 1 to 1.5 hours, then moving the obtained membrane into an oven at a temperature of 80DEG C for 10-15 hours of heat treatment, thus obtaining the modified polyurethane membrane. The material synthesis and membrane preparation process of the invention is simple, and the prepared membrane has good thermal and chemical stability as well as mechanical properties. Moreover, compared with traditional unmodified polyurethane separation membranes, the membrane prepared in the invention, due to the existence of the modifier cyclodextrin, has a better comprehensive separation effect on phenol in a phenol / water mixed solution, and has a great practical value.

A surgical suture material with an antimicrobial surface is described, the surface exhibiting a coating containing a) at least one fatty acid, b) octenidine dichloride and / or dequalinium chloride and c) optionally oligomeric lactic acid esters. In addition, a process for coating surgical suture material is described which is characterized by the fact that the thread material is wetted with a homogeneous methanolic solution of octenidine dichloride and / or dequalinium chloride and subsequently the methanol is evaporated, a coating forming on the thread surface.

The present invention provides a hot-melt adhesive having excellent solvent resistance and excellent adhesion to an adherend (in particular, a polyimide film) containing a battery electrolyte solution therein, and which can Contributes to the improvement of the performance of the electric device; the present invention also provides an electric device prepared by using the hot-melt adhesive. The hot-melt adhesive for electrical devices comprises an olefin-based modified polymer (A), wherein the olefin-based modified polymer (A) is a modified polymer with a silicon-containing functional group; The hot melt adhesive of the device has excellent resistance to the electrolyte of the battery (i.e., electrolyte or solvent resistance), and also has improved hot melt adhesive resistance to the battery containing the electrolyte therein. Adhesion of stickies (plastic films such as polyimide films).

The invention relates to cleaning liquid, in particular to environmentally-friendly water-based multifunctional electronic cleaning liquid for the electronic surface mount industry. The cleaning liquid comprises the following components in parts by weight: 35-60 parts of pure water, 1-3 parts of corrosion inhibitor, 3-5 parts of isomerous alcohol ether phosphate, 3-12 parts of alkaline auxiliary agent, 7-12 parts of secondary alkyl sulfonate, 3-8 parts of EO-PO (Ethylene Oxide-Propylene Oxide) copolymer, 10-25 parts of D-limonene and 5-10 parts of nonionic emulsifier. The cleaning liquid is safe to a cleaned object, cannot corrode an electronic circuit board, has excellent compatibility, good compatibility with most rubber and plastics and cannot cause swelling, corrosion, and the like, thus the cleaning liquid can be widely applied to electronic circuit boards and hardware plastic; the cleaning liquid can be used for cleaning residual soldering fluxes or residual tin cream and other dirt on a PCBA (Printed Circuit Board Assembly) at normal temperature or by warming up, and also can be used for cleaning heavy greasy dirt on hardware or plastic parts; and the cleaning liquid is an aqueous concentrated product, has strong cleaning power, can maintain good electrical performance for the PCBA and has no damages to the human body.

The invention relates to a corrosion prevention method for a short metal pipe. The method is characterized by comprising the following steps of: manufacturing a stainless steel cylinder of which the internal diameter is matched with the external diameter of the short metal pipe by using a stainless steel plate, sleeving the stainless steel cylinder on the outer wall of the short metal pipe, performing pipe expansion on the short metal pipe by using a mechanical pipe expansion method to form close fit between the stainless steel cylinder and the short metal pipe, and securely welding a port of the stainless steel cylinder and the outer wall of the short metal pipe. The method has the advantages that: the method is simple; the close fit is formed between the stainless steel plate and the short metal pipe, and one port of the stainless steel cylinder is securely welded with the outer wall of the short metal pipe, so that the stainless steel plate is more securely combined with the short metal pipe, and the phenomenon that the stainless steel plate is expanded open by pressure water can be avoided even though a welded junction between the stainless steel cylinder and the short metal pipe has an open welding point to realize long-term corrosion prevention.

The invention relates to a device for clearing accumulated dregs in pipelines without disassembly in zinc hydrometallurgy. The device comprises an acid concentration tank, an underflow intermediate tank, an underflow circulation tank, a dreg clearing pump, a first accumulated dreg pipeline, an underflow circulating pump and a second accumulated dreg pipeline. The device can clear two sets of pipelines at the same time, the dregs in the pipelines are rapidly cleared with high efficiency and good effect, the pipelines are not disassembled in the whole clearing process, the degree of automation is high, and the cost is low; the cleared ore pulp is subsequently processed to recover part of valuable metals, and meanwhile, the environment is not polluted.

A mold opening mechanism with mechanical gain, including a base, a static mold mounting plate arranged on the base, a dynamic mold mounting plate matched with the static mold mounting plate, and used to drive the dynamic mold mounting plate to move back and forth to realize opening / closing The transmission mechanism of the mold action; the transmission mechanism includes a screw, a nut set outside the screw, a connecting rod, and a hand wheel mounted on the end of the screw, and the connecting rod is articulated between the movable mold mounting plate and the nut. Compared with the prior art, the present invention overcomes the phenomenon of wrong shape and model damage that are easy to occur when opening and closing the mold manually. The present invention has simple structure, low manufacturing cost and wide application range; adopts screw drive, and the movement of the mechanism is accurate and reliable. The mold clamping force is large, which will not cause the mold to bulge and run out of fire; the operation is convenient, and the mold opening and closing process can be realized only by turning the hand wheel, reducing labor intensity. The invention prolongs the service life of the mold. The operation time of opening and closing the mold is short, which improves the production efficiency of the product.

The invention discloses a method for reducing water-soluble zinc in zinc-containing slag produced in zinc hydrometallurgy. The method is characterized in that the method comprises steps that: A, zinc-containing slag in a pulp state is subject to primary press-filtration in a box-type filter press, such that primary filtrate and filter residue are obtained; the filter residue is left in the box-type filter press; B, the primary filtrate obtained in the step A is delivered back to a leaching process; the filter residue left in the box-type filter press is combined with pulped zinc-containing slag additionally pumped into the filter press, and secondary press-filtration is carried out, such that secondary filtrate and filter residue are obtained; C, the secondary filtrate obtained in the step B is combined with the primary filtrate; the mixture is delivered back to the leaching process; one part of the obtained filter residue is delivered to a pulping tank, and prepared pulped zinc-containing slag is delivered to the box-type filter press; the other part of the filter residue is delivered back to a lead system or a zinc system in which valuable metals are recycled, such that a press filtration period is accomplished. In the pulping process, a pulping temperature is controlled at 40 to 70 DEG C, and a liquid-solid ratio is controlled at 2-6:1. The method provided by the invention is mainly used for reducing water-soluble zinc in zinc-containing slag produced in a filtration process of zinc hydrometallurgy enterprises.

The invention discloses a water-based optical lens cleaning agent composition, which comprises the following raw materials in parts by weight: 5-10 parts of organic base, 3-5 parts of inorganic base, 3-5 parts of environment-friendly chelating agent, 10-15 parts of dispersing agent, 15-20 parts of penetrating agent and 40-60 parts of de-ionized water. The water-based optical lens cleaning agent composition has the advantages that 1, the composition is an ODS (Ozone Depleting Substance) cleaning liquid substitute in the optical electronic cleaning industry, 2, the composition is a highly concentrated product and is only required to be diluted in water according to a proportion of 3-5 percent to have an excellent cleaning effect, 3, the composition is made of environment-friendly raw materials, has oral toxicity, can be contacted with skin, has extremely low inhalation toxicity and is safe to human bodies and easy to biodegrade, 4, the composition is safe to a cleaned object, does not corrode a lens, has excellent compatibility, meanwhile has excellent compatibility with most of rubber and plastic, does not swell or corrode and the like, and 5, the composition has strong cleaning power, is uniform in filming on the lens after cleaning, does not produce fog or spots and has no phenomenon of bubbling, the filming yield is greatly improved, and the production efficiency is increased.

The invention provides a construction method of an anti-corrosion coating, comprising: constructing a rubber asphalt waterproof coating on a base surface; further constructing a solvent-free epoxy resin coating on the rubber asphalt waterproof coating, the solvent-free epoxy The resin coating is compounded with the rubber asphalt waterproof coating to form an anti-corrosion coating on the base surface; the solvent-free epoxy resin coating includes A component and B component; the A component includes epoxy resin, Epoxy reactive diluents, additives, fillers and pigments; the B component includes modified polyamines; the epoxy reactive diluents are lauryl glycidyl ether, 1,4-butanediol diglycidyl ether , at least one of ethylene glycol diglycidyl ether; the additive includes at least one of leveling agent, rheological aid, dispersant, substrate wetting agent, defoamer and ultraviolet absorber; the filler Including titanium dioxide, talc powder, wet process sericite powder, wollastonite powder and ceramic powder.

The invention discloses a COFs composite nanofiltration membrane. The COFs composite nanofiltration membrane includes a PBI ultrafiltration layer and a COFs nanofiltration layer. The PBI ultrafiltration layer is obtained by coating polybenzimidazole on a non-woven fabric As a result, the COFs nanofiltration layer is formed on the PBI ultrafiltration layer through interfacial polymerization. The COFs composite nanofiltration membrane of the invention has good pressure resistance, solvent resistance and high flux. The invention also provides a preparation method of the COFs composite nanofiltration membrane.

The invention discloses a disassembly-free cleaning agent for a fuel spray nozzle and belongs to the field of automobile engines. On the basis that the total mass of the cleaning agent is 100 percent, the disassembly-free cleaning agent for the fuel spray nozzle comprises the following components in percentage by mass: 5 to 22 percent of decarbonizer, 3 to 25 percent of accelerant, 10 to 25 percent of combustion improver and 40 to 80 percent of diluent. The disassembly-free cleaning agent for the fuel spray nozzle is prepared by uniformly mixing the decarbonizer, the accelerant, the combustion improver and the diluents at normal temperature and normal pressure. The cleaning agent can effectively clean deposit of the fuel spray nozzle, avoids deformation and swelling of plastic and rubber,is combusted completely, avoids engine knocking and does not corrode metal parts.

The invention discloses a ciphertext domain high-capacity image reversible data hiding method, including prediction error detection, image encryption, ciphertext domain image reversible data hiding, secret information extraction and original image non-destructive recovery, wherein in the first part, all pixel points in a grayscale image are first divided into two categories that are sampling pixelpoints and non-sampling pixel points, and then all non-sampling pixel points are marked as prediction errors and accurate predictions respectively; in the second part, the marked grayscale image is encrypted by using a binary pseudo-random sequence generated by an encryption key; in the third part, the secret information is encrypted by using a binary pseudo-random sequence generated by a data hiding key, and then the encrypted secret information is used to embed data into each non-sampling pixel point that is marked as the accurate prediction in a ciphertext domain image; and in the fourth part, only the secret information is extracted, or only the original grayscale image is recovered, or the secret information is extracted first and then the original grayscale image is recovered. The method has the advantages that information can be embedded in the ciphertext domain image, and the embedding capacity is high.

The invention belongs to the technical field of hydrometallurgy, and specifically proposes a copper-cobalt ore treatment process. In this treatment process, after the copper-cobalt ore is pre-leached, the leaching solution is used as a stripping agent in the acid recovery system of the solvent extraction method; the recovered sulfuric acid solution is used for pre-leaching the copper-cobalt ore, and so on. Heap leaching can also be used to replace the copper-cobalt ore pre-leaching, the recovered sulfuric acid solution can be returned to the heap leaching, the swelling water can be evaporated by heap leaching, and new water can be added as the stripping agent for the acid recovery system by the solvent extraction method. The process of the invention is simple, can greatly reduce the loss of sulfuric acid and the consumption of alkaline substances such as limestone / lime, does not cause water expansion in the system, does not discharge waste water, and can realize the process flow of circulation.

The invention relates to a method for cleaning pipeline accumulated slag in a disassembly-free mode in zinc hydrometallurgy. The method comprises steps of initial ore pulp preparation, final ore pulp preparation, slag cleaning circulation, and the like. By adopting the method, two pipelines can be simultaneously cleaned, a bent pipeline can be also cleaned with rapid slag cleaning speed, high efficiency and good effect, the pipelines do not need to be disassembled, the automation degree is high, the cost is low, a part of valuable metal in the cleaned ore pulp can be recycled, and meanwhile, the environment is not polluted.