42results about How to "Enhance wetting power" patented technology

The invention provides a metal salt-free sealing agent for an aluminum alloy anodic oxide film, belonging to the technical field of aluminum alloy anodic oxide film post treatment. The sealing agent of the invention is prepared by water solution composed of 1.0-10g/L of a hydration accelerator, 0.01-2g/L of a wetting agent, 0.01-3g/L of an ash inhibitor and 1-15g/L of a pH buffering agent, wherein the pH of workpiece fluid is 5.5-6.5, the operating temperature is 70-90 DEG C, and the sealing speed is 1.0-2.0min/um. The metal salt-free sealing agent creatively adopts organic compounds which are easily subject to biodegradation, does not contain any metal ions of nickel, cobalt, magnesium, calcium, lithium and the like as well as fluorinions, and obtains satisfactory sealing effect of the nano-pores of the aluminum alloy anodic oxide film by virtue of the scientific and coordinated component formula of the water solution; the aluminum alloy anodic oxide film obtained by seal treatment through the sealing agent has the advantages of good corrosion resistance, capability of meeting the requirements of GB 14952.1-94, good light-protection and color-protection properties of a film layer, no ash and pruina, no water stain after drying as well as light flowing color and small color difference change in case of sealing the organic dyeing film; and the metal salt-free sealing agent is widely applicable to sealing treatment of an original-color anodic oxide film, an electrolytic coloring anodic oxide film, a hard oxide film and a dyeing anodic oxide film.

The invention discloses halogen-free cleaning-free soldering flux for lead-free solder, which comprises the compositions in percentage by weight: 1.5 to 4.5 percent of organic acid activator, 0.5 to 8.5 percent of high-quality abietic resin, 0.3 to 1.5 percent of activated reinforcer, 0.2 to 0.8 percent of surfactant, 3.0 to 15.0 percent of wet strengthening agent, and the balance being solvent isopropanol, absolute ethyl alcohol or deionized water. The soldering flux fully meets various regulation requirements for limiting halogen. The soldering flux developed by using a novel material which does not contain the halogen can scientifically reduce the surface tension of the lead-free solder, strengthen the wetting power of the lead-free solder, improve the solderability, can be compatible with a plurality of welding materials, and has no corrosion effect on lead-free solder alloy; composing materials are volatilized by stages during the welding process, so after the welding, the surface of a PCB board has less residue, even spread, less ion residue, and reliable electrical insulating property, and does not need to be washed; and the soldering flux is a novel environment-friendly halogen-free cleaning-free soldering flux for the lead-free solder.

The invention discloses halogen-free low-temperature tinol which comprises the following components by mass percent: 85-95% of solder powder and 5-15% of scaling powder, wherein the solder powder is Sn-Bi series solder powder, and the scaling powder comprises the following components by mass percent: 35-45% of solvent, 35-45% of film forming agent, 5-10% of active agent, 1-5% of thixotropic agent, 1-2% of antioxygen and 1-3% of the balance. With the adoption of the mode, the stability of the tinol can be improved; the tinol has very high wetting power and a very high expansion rate; and no residue is remained after soldering.

The invention relates to a tin-based lead-free solder and a preparing method thereof, the tin-based lead-free solder contains, based on weight percentage, 0.005-0.5% of gallium, 0.1-1% of silver, 0.1-1% of copper, 0.001-0.5% of phosphor and tin as the balance. The method for preparing the tin-based lead-free solder comprises the steps of: first of all, preparing four intermediate alloy ingots including tin-gallium, tin-silver, tin-copper and tin-phosphor; adding the four intermediate alloy ingots according to particular weight parts and then additionally adding the balancing tin; in the meantime, adding the mixture into a manganese alloy pot for melting, and heating up to 450 DEG C; discharging, cooling and casting into the lead-free solder so as to obtain the lead-free solder that contains gallium, silver, copper and phosphor with tin being the balance. The invention has the advantage that the lead-free solder is low in melting point, excellent in wettability, bright in soldering spot, persistent in anti-oxidation under high temperature operation and low in cost.

The invention discloses an anti-wrinkle skin-tendering emulsion containing natural component extracts and a preparation method thereof. The emulsion is prepared from the following substances: grape seed oil, wheat-germ oil, broccoli juice, pea shoot juice, nicotinamide, vitamin C, synthetic squalane, sodium alginate, carbomer, poloxamer, a self-emulsified compound emulsifier, glycerol, triethanolamine, a 10% ethylenediamine tetraacetic acid disodium solution, a 20% methylparaben alcoholic solution and distilled water. Compared with the prior art, the emulsion has the characteristics of mild property and high safety, O/W type emulsion with uniform and fine texture, freshness without greasy feeling can be prepared by adopting a method of combining natural component extracts and plant essential oil. The emulsion is capable of firming skin and smoothing wrinkles, and exerting certain effects of removing spots, whitening and nourishing, so that the tender and moistened activity of skin can be rejuvenized.

The invention relates to a zinc-based soft solder suitable for hot-drip galvanizing repair. Solder alloy comprises, by weight, 50-60 parts of zinc, 0.5-1.5 parts of aluminum, 0.1-0.5 part of rare earth and 38-49 parts of tin. The rare earth is misch metal. After the aluminum and the rare earth are added to the solder, the solder has good oxidation resistance and wetting property, and repair of galvanized steel can be well achieved. The zinc-based soft solder has oxidation resistance and high corrosion resistance, the comprehensive performance of the alloy can be effectively changed by adding the rare earth, a trace of active rare earth can be easily gathered on the interface and the surface of the alloy solder in a liquid state, so that the surface of the alloy is remarkably lowered, the rare earth cooperates with the aluminum to improve the wetting property with the surface of a repair layer (steel), the mechanical property of the solder is improved, and the malleability and the shear strength of the solder are improved.

The invention discloses refreshing compound essential oil wet tissue. The wet tissue is prepared by, by weight, 1.5-2.5 parts of benzoin essential oil, 1.2-2.0 parts of rosemary essential oil, 0.8-1.5 parts of thyme essential oil, 0.5-1.2 parts of mint essential oil, 0.4-1.0 part of tea plant essential oil, 0.5-1.3 parts of vetiver essential oil and 7.8-8.5 parts of wheat germ oil. The refreshing compound essential oil wet tissue has the advantages that naturally-extracted essential oil serves as a raw material, no toxic irritant substance is contained, no side effect is generated for the human body after the wet tissue is used for a long time, people cannot be addicted to the wet tissue, and the wet tissue is safe and effective. Borneol is added into components, absorption to the essential oil by nasal cavity mucosa is enhanced, and the wet tissue further has heat absorption and cooling effects when used in summer.

The invention discloses a compound essential oil spray with a refreshing function. The compound essential oil spray with the refreshing function is prepared from the following active ingredients in parts by weight: 1.5-2.5 parts of benzoin essential oil, 0.5-1.2 parts of peppermint essential oil, 0.5-1.0 parts of sweet marjoram essential oil, 1.2-2.0 parts of rosemary essential oil, 0.8-1.5 parts of thyme essential oil, and 7.5-8.5 parts of wheat germ oil. The compound essential oil spray has good effects that the natural extraction essential oil is taken as the raw material without toxic stimulating substance, the compound essential oil spray does not have side effect or addiction on a human body after being used for a long time and is safe and effective; the essential oils are mixed and cannot generate other dangerous chemical substances and the fragrance is fresh and cool; the fatigue nerve of the human body is completely activated through meridian circulation and qi and blood flow.

This invention discloses a lead-free Sn—Zn—Al—Ag solder alloy, which is composed of 7-10 wt % of Zn, up to 0.5 wt % of Al, up to 4.0 wt % of Ag, and the balance of Sn; and a lead-free Sn—Zn—Al—Ag—Ga solder alloy, which is composed of 7-10 wt % of Zn, up to 0.5 wt % of Al, up to 4.0 wt % of Ag, up to 4.0 wt % of Ga; and the balance of Sn. The lead-free solder alloys of the present invention have better tensile strength and elongation than the conventional Sn—Pb solder alloys. In addition, the lead-free solder alloys of the present invention have a melting point lower than 200° C., which is close to the 183.5° C. of an eutectic Sn—Pb alloy.

The invention relates to a producing method for a silver oxide welding material. The method comprises the steps of (1) cleaning the surface of a stainless steel band; (2) feeding silver oxide powder in a spraying machine, and fixing the spraying machine on a movable device to be moved at the uniform velocity; (3) coating a layer of glue on the upper surface of the stainless steel band; (4) starting the spraying machine to spray the upper surface of the stainless steel band to form a coating, repeating spraying for 2 to 4 times, and performing natural cooling; (5) performing same treating on the lower surface of the stainless steel band to obtain the silver oxide welding material eventually. According to the method, the silver oxide welding material is produced through a glue mode, so that the method is simple, the operation is facilitated, the obtained welding material is flat in surface, and as for the performance, silver has good electrical conductivity and mobility, so that the wetting power between the welding material and a substrate during welding is high, and the joint toughness is good. Besides, the welding material can be used as a base material, and welding materials of different specifications after binding pressing are obtained.

The invention provides a photovoltaic pre-coating material, a pre-coated solder strip and preparation methods thereof, and belongs to the technical field of photovoltaic new energy. The photovoltaic pre-coating material comprises hydrogenated rosin, maleated rosin, rosin ester, succinic acid, glutaric acid and adipic acid; the preparation method comprises the following steps: mixing and heating hydrogenated rosin and maleated rosin, sequentially adding rosin ester, succinic acid, glutaric acid, adipic acid and tetracosanoic acid, stirring, mixing and melting to obtain the photovoltaic pre-coating material. The pre-coated solder strip comprises a base body, a tin coating and the photovoltaic pre-coating material. The preparation method of the pre-coated solder strip comprises the followingsteps: sending the base material into a high-speed tinning machine for tinning so as to obtain a tinned base material; putting the photovoltaic pre-coating material into a coating machine or a spraying machine; putting the tinned base material into the coating machine or the spraying machine, coating the tinned base material with the photovoltaic pre-coating material or blowing the tinned base material with an air knife, and slowly baking the tinned base material until the tinned base material is dry or rapidly cooling at a low temperature to prepare the pre-coated solder strip. The process issimple in process, the cost investment is low, and the material of the invention belongs to an environment-friendly material.

The invention discloses scaling powder for an integrated circuit board patch. The scaling powder is prepared from, by weight, 60-80 parts of modified rosin, 30-40 parts of glycerol ester of rosin, 20-30 parts of butyl acetate, 10-30 parts of texanol, 10-20 parts of pentaerythritol oleate, 5-15 parts of dimethyl imidazole, 3-8 parts of benzimidazole, 5-10 parts of salicylic acid, 2-8 parts of succinic acid, 5-10 parts of tartaric acid, 8-15 parts of adipic acid, 3-8 parts of triethanolamine, 2-6 parts of triisopropanolamine, 4-10 parts of nanometer titania, 20-40 parts of solvents, 1-5 parts of thixotropic agent, 0.3-0.8 part of surface active agent and 0.5-3 parts of coalescing agent. The scaling powder has the high solder wetting capability, can enhance the solder weldability, can adapt to various solder welding temperatures, generates few resides after welding is performed, and is high in insulation resistance, environmentally friendly and free of pollution.

The invention discloses a lead-free solder alloy and a preparation method thereof, and belongs to the technical field of alloys. The lead-free solder alloy comprises the following raw materials by weight: 3%-5% of Zn, 1%-2% of Bi, 0.5%-1.5% of Ti, 0.001%-0.003% of In, 0.015%-0.035% of Ni, 0.02%-0.06% of Ce, 0.04%-0.06% of Ge and the balance Sn. The wetting property of the lead-free solder alloy isimproved by using a reinforcing system composed of Ni, Ce and Ge.

The invention discloses a lead-free solder tin wire applicable to the drag soldering technology. The lead-free solder tin wire comprises the following components in percentage by weight: 96.0%-98.5% of lead-free solder and 4.0%-1.5% of scaling powder, wherein the scaling powder comprises the following components in percentage by weight: 1-4% of an organic solvent with a low boiling point, 4-10% of an activator, 0-0.5% of corrosion inhibitor and the balance of modified rosin. The lead-free solder tin wire can rapidly weld a component on a base plate, is high in tin breaking performance, does not cause the continuous tin phenomenon during the continuous application process, greatly improves the working efficiency, lowers the cost, does not contain the forbidden substances including RoHS2.0, REACH and the like, does not cause harm to the environment and meets the environmental protection requirement.

The invention discloses an anti-wrinkle antioxidant smearing mask. The anti-wrinkle antioxidant smearing mask is prepared from the following components in proportion: 10-13 ml of fermented milk, 3-5 ml of aloe juice, 3-5 ml of cucumber juice, 3-4 drops of wheat germ oil and 1-2 drops of sandalwood essential oil; and beer saccharomycete and lactobacilli are added into the fermented milk. The anti-wrinkle antioxidant smearing mask has the advantages of being easy and convenient to use, high in stability, good in absorption effect and high in antioxidant property, and has an effect of wrinkle removal.

The invention belongs to the field of preparation of composite titanium dioxide, and relates to a preparation method of composite titanium dioxide. The preparation method comprises the following steps: mixing and stirring oxalic acid, absolute ethyl alcohol and deionized water to obtain a stirred solution; mixing tetrabutyl titanate and absolute ethyl alcohol to obtain a mixed solution; adding themixed solution in the stirred solution, standing, placing precipitates in a water bath for evaporation, and drying to obtain a dried material; adding hydrochloric acid, mixing, standing, and filtering to obtain a filter residue, placing the filter residue in hot water, stirring, filtering to obtain a filter residue a, grinding, sieving to obtain a sieved material, adding a coupling agent and an ethanol solution, mixing, oscillating, performing suction filtering, drying, grinding to obtain a ground material, adding absolute ethyl alcohol and deionized water, mixing, stirring, adding a flourescent brightener, centrifuging, and performing vacuum drying on precipitates to obtain a dried material a; and mixing modified calcium carbonate, a dispersant, sodium dodecyl benzene sulfonate and water, grinding, adding the dried material a, grinding, dehydrating, drying, and crushing to obtain the composite titanium dioxide.