38results about How to "Strengthen the bridging effect" patented technology

The invention belongs to the technical field of paint, and particularly relates to a transition primer composition. The transition primer composition provided by the invention comprises VAC and solvents. Through being metered by 100 percent of the total weight of the primer paint, the VAC accounts for 20 to 25 percent, wherein a paint film formed by the transition primer composition is used as transition primer between a PVC substrate and PU finish paint. The 20 to 25 weight percent of VAC is used as a main film forming substance. On one hand, the VAC and the PVC substrate have good adhesion power; on the other hand, the VAC can be chemically interlinked with the PU finish pint, so that the paint film formed by the transition primer and the PU paint form a whole to a certain degree, so that a good bridging effect is achieved between the PU finish paint and the PVC substrate; the thickness of the paint film is proper; good adhesion power between the PU finish paint and the PVC substrate is further ensured.

The invention relates to a water purifier, and provides a coagulant used for advanced treatment of biochemical effluent of coking wastewater. The coagulant is composed of a condensed adsorbent and a coagulant aid, wherein the condensed adsorbent comprises the following components of, by weight, 5-20% of polyaluminum chloride, 30-60% of solid polymer ferric sulfate, 10-40% of polyferric silicate sulphate, and 10-40% of modified diatomite; and the coagulant aid consists of a 1% dicyandiamide-formaldehyde polymer solution. The coagulant has a double effect of coagulation and adsorption, can effectively remove COD, colourity and the like of the biochemical effluent, makes the effluent stably reaching to the national first class discharge standard, is small in consumption, and reduces the cost for the advanced treatment of the coking wastewater.

The present invention provides a three-phase nanometer emulsion having a core-shell structure, wherein the three-phase nanometer emulsion comprises, by weight, 25 parts of water, 20-50 parts of an organic solvent, 1-20 parts of a nanometer core solution, 1-20 parts of a nonionic surfactant, 1-10 parts of an anionic surfactant, and 0-15 parts of an inorganic salt. The invention further provides a preparation method of the three-phase nanometer emulsion. The preparation method comprises: 1) dissolving a nonionic surfactant and an anionic surfactant in an organic solvent to obtain an oil phase; 2) adding a certain amount of a nanometer core solution to the oil phase obtained in the step 1), and carrying out constant temperature treatment to obtain a transition body having an oil core structure; and 3) mixing a certain amount of the nanometer core solution, an inorganic salt and water to obtain a water phase, and mixing the water phase and the transition body obtained in the step 2) to obtain the three-phase nanometer emulsion having the core-shell structure. The invention further relates to applications of the three-phase nanometer emulsion in the field of well drilling.

The invention discloses a novel foam roller printing method, which includes processing the foam roller through upper treatment, film flow, roll transfer, cleaning and packaging. The EVA surface treatment agent refined by the foam shaft through a special polymerization process in the present invention has a yellowing resistance level of 3.5-4, has strong permeability and adhesion, and can effectively improve the polarity of the surface of the EVA material. The bonding between the surface of the material and the adhesive layer provides excellent bridging effect, which makes the product more beautiful, with a stronger sense of picture, less process flow, short production cycle, improved work efficiency, and achieves the effect of relieving stress and relaxing the body and mind. The appearance of the product is bright, Vibrant colors, durable and no fading.

The invention discloses a novel compound water treatment flocculant as well as a preparation method and application thereof, and belongs to the field of sewage treatment. The water treatment flocculant is prepared from bentonite and chitosan which exist extensively in the nature as main raw materials by the steps of adopting an acid dissolution-covering-loading technology to prepare chitosan-loaded bentonite, adopting quaterisation reaction to prepare quaterisation chitosan, and combining polymeric ferric sulfate at the same time, thereby preparing the novel compound water treatment flocculant. The novel compound water treatment flocculant is applied to sewage treatment to solve the problem of aluminum and iron residues during water treatment, the problem of secondary pollution of acrylamide monomers, and the defects of loose particles, difficult sedimentation and the like caused by single use of a biological flocculant.

The invention discloses a fibrous composite gel particle bridging agent for fractured oil reservoirs and a preparation method thereof. The bridging agent is compounded by the following raw materials in parts by weight: 5-20 parts of polypropylene fiber, 5-15 parts of acrylamide 3-10 parts of polyamino acid ester, 0.2-1 part of potassium persulfate, 0.5-2.5 parts of starch, 0.1-0.5 part of polyethylene glycol diacrylate, 0.02-0.1 part of N,N-dimethylacrylamide, The balance is water. The bridging agent of the present invention is in the form of particles during the injection process, which is conducive to the migration of fibers to the target layer. In the formation, due to the influence of temperature and salinity, the gel particles degrade and release filamentous fibers, and the released fibers can achieve The purpose of bridging, thereby realizing the positioning plugging of fractured reservoirs by injecting small-sized particles.

The invention discloses a plugging material and plugging slurry for protecting a reservoir stratum with the low fracturing fracture ability. The plugging material is prepared from, by weight, 5-6 parts of walnut shell powder, 2-3 parts of a composite plugging agent, 1.5-2 parts of an agent for plugging while drilling, 4-5 parts of an acid soluble plugging agent, 4-5 parts of a high-dehydration-rate plugging agent and 0.2-0.3 part of calcium oxide. The natural plant inertia material, the fiber plugging agent and the acid soluble plugging agent are mixed according to the certain matching ratio to form the acid soluble plugging material in granule and fiber shapes. The material has the advantages that the bridging effect of a bridging material is good and the plugging success rate is high, and also has the advantages that the density is low, stratum pressure is effectively balanced, the stratum damage is small, the plugging property is strong and acid solubility is achieved. The plugging slurry prepared from the plugging material and water has the advantages of being low in density, high in pressure bearing capability, good in malignant leakage plugging effect, high in acid solubility and the like; the on-site preparation process is simple, construction is safe and reliable, and the purposes of reducing well leakage loss and protecting the reservoir stratum can be achieved.

The invention relates to a preparation method of a polylactic acid composite material by use of oriented distribution of nano-hydroxyapatite for enhancement, and the method is as follows: calcium nitrate, ammonium phosphate and gelatin aqueous solution are mixed for preparation of hydroxyapatite suspension by heating, PH adjusting and homoiothermy; polylactic acid is dissolved in an organic solvent and then is added to the suspension for mixing, heating and centrifugal drying to prepare hydroxyapatite-polylactic acid composite powder and granulate; and multi-channel shear extrusion deformation of an injection-molded composite molding material is performed by an equal channel angular pressing die under certain process conditions to obtain the target product. The advantages of the preparation method are that: gelatin is introduced to improve the uniform distribution of the hydroxyapatite in a polylactic acid matrix and increase the interface bonding strength; by multi-channel equal angular pressing, the rod-like hydroxyapatite can be directionally evenly distributed in the polylactic acid matrix, the comprehensive mechanics performance of the composite material can be improved, and the preparation process is simple, low-cost, and more suitable for productization.

The invention discloses a water-based polyurethane surface layer resin, which is made of the following raw materials in parts by weight: 10-30 parts of polymer polyol, 0-5 parts of polyether modified silicone oil, 0-5 parts of self-made sulfonate type polymer polyol 5 parts, 10-30 parts of isocyanate, 0.1-2 parts of small molecule polyol, 1-5 parts of hydrophilic chain extender, 0.1-1 part of small molecule terminal amino compound, 40-60 parts of deionized water, self-made closed type water-based 1-3 parts of isocyanate crosslinking agent, 1-5 parts of pH regulator. The water-based polyurethane surface layer resin of the present invention is an environmentally friendly material, which meets the environmental protection standards of the European Union; it belongs to the surface layer resin for synthetic leather. When the two-component adhesive is used together, poor adhesion or even delamination may occur.