348results about How to "No foaming" patented technology

The invention relates to a protective technology for plating a plurality of plating layers on the surface of sintered neodymium iron boron. The technology is characterized in that firstly the surface is subjected to pretreatment before plating; secondly, NiZnP alloy is chemically plated on the surface; and finally, a plurality of NiWP alloy (at least three layers) are plated on the surface through controlling potential or current. The technology adopts the following specific steps: A, pretreatment before plating; B, chemical plating of the NiZnP alloy; and C, electroplating of a plurality of NiWP alloy layers. The technology has the following advantages: (1) the plating layer resists neutral salt mist corrosion; (2) a moist heat resistant test of the plating layer: in a moist heat box, the temperature is 85 DEG C; the humidity is between 80 and 90 DEG C; the testing time is 360 hours; after testing, the plating layer has no bubble, rust spot or stain; and (3) the bonding force of the plating layer: a scratch method: scratch of 1*1mm<2> is scratched to a basal body from the plating layer by a knife; and the plating layer does not fall off.

The invention discloses a special adhesive for underwater construction, and the special adhesive comprises an A component and a B component at a weight ratio of 100:(20-100):25, wherein the A component is prepared from the following raw materials in parts by weight: 30-60 parts of modified epoxy resin, 5-30 parts of tackifier, 2-10 parts of accelerant, 5-15 parts of reactive diluent, 0.1-0.3 parts of surfactant, and 10-35 parts of filler powder; the B component is prepared from the following raw materials in parts by weight: 0-60 parts of ketimine, 0-60 parts of phenalkamine, 30-65 parts of modified polyamide, 1-6 parts of curing accelerator, and 2-15 parts of moisture repellent. The special adhesive for underwater construction has the advantages of being good in bonding strength in water, good in toughness, water-resistant, capable of resisting chemical attack, strong in initial viscous force and convenient to construct, and great improvement is brought for the underwater construction field.

The invention relates to an easy-construction two-component packaging aqueous epoxy zinc-rich coating. The coating selects a low-molecular-weight epoxy resin, an active diluent, a high-efficiency antifoaming agent, a wetting dispersant, ultrafine zinc powder, a self-emulsifying aqueous epoxy hardener, a cosolvent and water as raw materials. The aqueous epoxy zinc-rich coating has the advantages of good corrosion resistance, realization of resisting salt spray for 1500h, no foaming, rust or shredding of the coat of the coating, according with requirements of HG / T3668-2009 Zinc Rich Primer, good application performance, convenient onsite use, realization of the thickness of the once-formed coat of above 80mum, 1h surface drying and 16h hard drying at 25DEG C, and satisfying of the steel structure anticorrosion construction requirement. The aqueous epoxy zinc-rich coating can be applied to the anticorrosion of steel structures comprising ships, bridges, sea engineering apparatuses and the like, and can also be applied to the steel plate pretreatment streamline as a workshop primer.

The invention discloses a process for welding electronic microcomponents based on a multi-temperature gradient. The process is simple, convenient, efficient, stable and reliable in processing quality, good in welding flowability and little in welding hollows. The process is realized by the following technical scheme: designing the temperature gradient of welding fluxes according to melting points of different welding fluxes and respectively manufacturing welding flux slices at different temperature gradients from a secondary high temperature to a minimum temperature; dividing a function substrate and a transition parent plate on each electronic microcomponent into welding surfaces of the welding fluxes at different temperature gradients and coating a welding flux film coating layer on the welding surfaces directly and respectively by sputter coating; arranging welding flux thickness control pins at more points on the welding surfaces of the electronic component; laminating the electronic microcomponents (1), the welding flux slices (3) and the substrate component (5) sequentially, putting into a clamp with a counter-recoil pressure holding mechanism and putting the clamp into a furnace for vacuum welding; firstly completing the welding at a high temperature gradient, and then protecting other surfaces, which are not used for the welding at the next temperature gradient, of the substrate component, and coating one welding flux film coating layer on the welding surfaces respectively by the sputter coating at the next temperature gradient.

The invention relates to a method for producing color-coated steel sheet for a structure. The method comprises the following steps of: smelting, namely desulfurizing by molten iron, smelting by a converter, casting continuously to form a blank and performing hot rolling; performing acid washing; performing cold milling; annealing continuously; performing hot dipping on aluminum and zinc; and polishing, straightening, performing color coating and packaging for later use. In the method, the yield strength RP 0.2 (or ReH) is between 550 and 600 MPa; the tensile strength Rm is between 560 and 610 MPa; and the percentage elongation after break A80 mm is more than or equal to 6 percent. A neutral salt mist test is performed for 1,200 hours, a coating does not have bubbling and corrosion phenomena. At present, the annealed color-coated plate of which the metallographic structure is ferrite and pearlite or the ferrite and free cementite or the ferrite and the pearlite and less free cementite cannot achieve the effect, and the production cost can be reduced by 10 to 15 percent. By the method, special occasions which have high-yield strength and are used for cooling chambers of automobiles, arch coverings and the like can be met, and a process is simple and easy to implement.

The invention relates to a salt-resistant type low-temperature foam lifting drainage chemical additive, and a preparation method and an application thereof. The chemical additive is prepared through mixing cocamidopropylamine oxide, dodecyl polyglucoside, lauryl hydroxypropyl sulphobetaine and ethylene glycol according to a certain proportion uniformly. The chemical additive cannot be frozen under the lowest temperature condition in winter in various gas fields in China, satisfies site ground construction requirements and has a wide application prospect. Moreover, the chemical additive does not have stimulus and has excellent salt resistance; and under the condition that the mineralization degree is 200000 milligrams / liter, the chemical additive does not generate precipitation and still has excellent foaming and liquid carrying capabilities.

The invention relates to the technical field of protection coatings and in particular relates to a bicomponent silicofluoride acrylic polyurethane coating. The coating comprises a first component and a second component, wherein the mass ratio of the first component to the second component is (3 : 1) to (5 : 1); the first component comprises the following raw materials by weight parts: 50-70 parts of hydroxy acrylic resin, 15-24 parts of a solvent, 0.1-3 parts of fluorine-containing micropowder, 10-25 parts of a pigment, 1-3 parts of high-hardness oxide and 2-5 parts of aids; the second component comprises the following raw materials in parts by weight: 50-80 parts of a closed isocyanate curing agent and 20-50 parts of a solvent. According to the coating, the capability of protecting a steel structure can be improved; the coating has the characteristics of good ageing resistance, scratch resistance, corrosion prevention, color change prevention, pollution prevention and the like, and can achieve a very good long-acting protection effect on the steel structure by combination with other base paint and intermediate paint with excellent performance; and the protection life can be 30 years.

The invention discloses a wind resistance and heat preservation EPS board outer wall structure which comprises a wall body, a galvanized steel wire netting, a bonding layer, an EPS heat preservation plate layer, a gridding cloth, an elastic coating and anchor bolts. The wind resistance and heat preservation EPS board outer wall structure is characterized in that composite mortar is laid on the inner side of a wall body, a plastering layer is arranged on the outer side of the wall body, the galvanized steel wire netting is laid inside the plastering layer, the EPS heat preservation plate layer is stuck to the outer side of the plastering layer, the thickness of an adhesive layer stuck to the surface of the heat preservation plate is controlled to be 4-5 mm, the anchor bolts penetrate through EPS heat preservation plates, the galvanized steel wire netting is fixed to the outer side of the wall body, each EPS heat preservation plate is provided with two anchor bolts and installed on a middle line, the anchor bolts press the bottom layer gridding cloth to form a fire barrier, and the gridding cloth and elastic coating are stuck to the outer sides of the EPS heat preservation plates. The construction method comprises the steps of base layer wall treatment, sticking of the heat preservation plates and the base layer, fixing of the fire barrier, auxiliary fixing of the heat preservation plates, sticking of the gridding cloth and a facing layer, and field testing and inspection.

The invention provides an adhesive and an insulating reinforcing tape including the adhesive. The adhesive includes the following components (by weight): 100 parts of epoxy resin, 5-20 parts of thermoplastic resin, 20-100 parts of rubber, and 5-30 parts of a curing agent. The insulating reinforcing tape includes an insulating substrate and an adhesive layer disposed on the insulating substrate, wherein the adhesive layer is formed of the above adhesive. The adhesive provided by the invention has high adhesive force, heat resistance and good fluidity, and the insulating reinforcing tape prepared by the invention has small amount of glue overflow during hot-pressing, good adhesive property, strong deformation plasticity and good pressure fillibility, is easy for hot-press forming, low-cost,can be used for reinforcement and insulation coating of flexible circuit boards.