47results about How to "VOC-free" patented technology

The invention relates to solder for a flip chip LED and application thereof. The solder is an Sn-Zn-X multi-component alloy, wherein X is selected from one or more of Al, Ag, Cu and Bi. The solder isprepared from in percentage by mass: 40-95% (preferably 50-85%) of Sn, 5-60% (preferably 7-50%) of Zn, and 0.5-15% (preferably 0.5-10%) of X. The solder has the beneficial effects that a packaging technology is simplified, and the production efficiency of a flip chip is improved; the working junction temperature of the chip is lowered, the welding voidage of the chip is decreased, the heat-dissipating property of the chip can be improved, luminous decay is lowered, the luminous efficiency of the chip is improved greatly, and the service life of the chip is prolonged greatly; and meanwhile, thesolder can absorb heat stress generated during working of the chip, and thus stability and reliability of the chip are improved.

The invention provides a polysilicon ceramic high-temperature-resistant and corrosion-resistant coating and a preparation method thereof. The preparation method comprises the following steps: stirringmodified graphene with a polysilane modified epoxy resin to obtain a resin mixture; stirring the resin mixture, zirconium oxide and zinc oxide to obtain a component A; further mixing the component Awith a curing agent, thereby obtaining the polysilicon ceramic high-temperature-resistant and corrosion-resistant coating. According to the polysilicon ceramic high-temperature-resistant and corrosion-resistant coating prepared with the method, solutions and oxide packing crystal lattices in the coating heated at a high temperature are crosslinked, invasion of an oxidation medium can be effectively prevented by a stable Tg phase interface at the high temperature, and thus crystal lattice oxidation can be avoided; meanwhile, the coating comprises a great amount of corrosion-resistant factors and OH active groups, a polymer corrosion-resistant coating with a three-dimensional structure can be generated, and the coating has dual functions of electrochemical protection and physical shielding and is particularly applicable to long-acting high-temperature protection of substrates.

The invention discloses a high-temperature-resistant plating-resisting coating and a preparation method thereof. The plating-resisting coating comprises the raw materials in parts by weight as follows: 40-80 parts of high-temperature-resistant silicone resin, 5-10 parts of acrylic resin, 10-35 parts of mica powder, 10-15 parts of copper chromite black and 10-20 parts of silicon dioxide. The method comprises the steps as follows: the high-temperature-resistant silicone resin, the mica powder and the copper chromite black are uniformly mixed and dispersed under the condition of 200-1500 r / min, so that a mixture is obtained; the silicon dioxide is added to the mixture, and the mixture is fully dispersed for 2-5 h; and sedimentation is performed for about 1-3 h, so that the high-temperature-resistant plating-resisting coating is obtained. According to the high-temperature-resistant plating-resisting coating, the technical requirement indexes that a plating layer is perfectly protected and is not corroded by a high-temperature plating solution and the like in an environment of 300-1000 DEG C are met; and the adhesive force of the product is high, tedious processes such as primer coating and the like are not required, the paint coating process is simple, and the cost is greatly saved.

The invention provides a low-carbon low-volatility water-based flux and a preparation method thereof. The low-carbon low-volatility water-based flux is prepared from the following components, by mass:2-4.5% of an active agent, 1.5-4% of a surface active agent, 0-0.4% of a film-forming agent, 0.01-0.3% of an antioxidant, 0.01-0.4% of a corrosion inhibitor and the balance a solvent, specifically, the active agent is prepared by mixing at least two of succinic acid, benzoic acid, DL-malic acid and adipic acid at the mass ratio of greater than 0% respectively at the temperature of 30-60 DEG C; and the surface active agent is any one of AEC-9NA or TX-10 phosphate, or the surface active agent is prepared by mixing both of the AEC-9NA and TX-10 phosphate at the mass ratio of greater than 0% respectively. The flux has low solid residue content, no halogen, no rosin, low carbon, no volatile organic compound, no irritating odor, little corrosion to a circuit board, and round and bright solder joints. Besides, the flux is easy to manufacture, quite low in cost, convenient to store and transport, free of solder explosion, stable in chemical property, free of influence on physical health of operators and environmentally friendly.

The present invention relates to aqueous-based primer composition, comprising at least one thermosetting, self-emulsifying epoxy resin composition; at least one thermosetting, non-self-emulsifying resin composition; water; and at least one curative.

The invention provides a plane single-sheet compound veneer with UV (Ultraviolet) primer. A multilayered structure is adopted; a surface layer is a veneer layer and a bottom surface is a nonwoven fabric or kraft paper; a compound adhesive is arranged between layers. UV paint is arranged into a microcosmic gap of a wood layer. The veneer has good flexible property, stability and good post process treatment property. The veneer can be laminated or coated on an abnormal-shape surface of any material. The secondary treatment or machining property is good and the veneer is stable and reliable. Compared with a traditional pasted veneer surface treatment process, a lot of process procedures are saved and the labor cost is saved, so that the production cost and technology cost of downstream products are reduced and the economic benefits of the downstream products are greatly improved.

The invention discloses a 40Cr steel surface antirust agent, which is composed of the following components in mass percentage: 10-14% of barium petroleum sulfonate, 4-7% of 80# microcrystalline wax, 59% of industrial castor oil, and water-based acrylic resin 11-14%, coal tar naphtha 3-4%, 96% concentrated hydrochloric acid 2-3%, cross-linked polyvinylpyrrolidone 1-3%, wetting agent 1-2%, defoamer 1-2%, the present invention Excellent material selection and scientific processing methods have solved the problem of steel surface corrosion in the past and are conducive to anti-rust operations. The invention uses industrial castor oil as the dispersion medium, which is environmentally friendly and pollution-free; it does not contain toluene, ethylbenzene, di Toluene, low VOC, no formaldehyde, heavy metal content lower than the national mandatory standard, no irritating smell, can prevent corrosion, cavitation and scaling on the steel surface, form a protective layer, prolong the time of rust on the steel surface, and exclude it from the formula Instead of chromic acid or dichromate, it is low in cost, non-toxic, has no adverse effect on the skin, and has excellent construction performance, and has significant environmental, economic and social benefits.

The invention discloses a ready-mixed mortar water-retention thixotropic agent and a preparation method thereof. The mortar comprises the components of, by mass: 20-40% of cellulose ether, 10-20% of a thickener, 8-15% of re-dispersible latex powder, 0-2% of a surfactant, and 40-50% of a thixotropic agent. The components with the specified mass percentages are uniformly mixed in a mixing machine, such that the ready-mixed mortar water-retention thixotropic agent is obtained. The ready-mixed mortar water-retention thixotropic agent has the characteristics of good water retention performance, cohesiveness, construction smoothness, and no VOC. When the agent is used in manual work mortar and machine-sprayed mortar, construction efficiency and project quality can be substantially improved.

The invention discloses a water-based insulating varnish comprising water-based epoxy resin, a water-based epoxy curing agent modified by a polyol, and an auxiliary agent. The weight ratio of polyol modified waterborne epoxy curing agent is 2.5‑3:1. The invention also discloses that the preparation method of the water-based insulating varnish comprises: reacting epoxy resin and polyol to obtain a prepolymer with terminal epoxy functional group; Add phenyl glycidyl ether, react to the end; cool down, add water to emulsify to obtain water-based epoxy curing agent; weigh water-based epoxy curing agent, water-based epoxy resin, defoamer, leveling agent, dispersant and mix well, Baking, cooling steps. The water-based insulating varnish has no co-solvent, zero VOC, no safety hazard, meets the requirements of green environmental protection, has high electrical strength and high heat resistance.