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45results about How to "Meet the requirements of environmental performance" patented technology

Novel lead-free environmental-friendly copper-based alloy material and manufacturing method thereof

The invention provides a novel lead-free environmental-friendly copper-based alloy material and a manufacturing method thereof. The novel lead-free environmental-friendly copper-based alloy material provided by the invention consists of the following components by weight: 1-4.5 percent of zinc, 6-8 percent of tin, 1-2.5 percent of bismuth, 1-3 percent of silicon carbide and the balance of copper. In the novel alloy material provided by the invention, the bismuth element is adopted to replace a lead element in a conventional copper alloy; a nanoscale silicon carbide material is added; by performance of expanding due to cold and contracting due to heat of bismuth and high toughness and high hardness of the nanoscale silicon carbide material, the novel lead-free environmental-friendly copper-based alloy material which completely can replace a tin bronze material containing the lead element is produced. According to the invention, under the condition of not increasing cost, the requirement on environmental-friendly performance of the alloy is met, cutting performance and hardness of the alloy are also further improved, and the novel lead-free environmental-friendly copper-based alloy material is suitable for a wear-resistant part at a high temperature (400 DEG C).
Owner:SUZHOU JINCANG ALLOY NEW MATERIAL

Preparation method of styrene-maleic anhydride-nitrophenyl maleimide terpolymer

The invention discloses a styrene-maleic anhydride-nitrophenyl maleimide terpolymer and a preparation method thereof. The terpolymer is characterized by comprising the following components by weight percentage: 50-90 parts of styrene, 1-20 parts of maleic anhydride, and 10-30 parts of nitrophenyl maleimide. The glass transition temperature is 150-200DEG C, a bulk polymerization way is employed forpreparation, firstly part of the styrene is added into a reaction kettle, then a styrene solution with dissolved maleic anhydride and nitrophenyl maleimide is added dropwise into the reaction kettle,the temperature of the reaction kettle is 90-140DEG C, and the pressure is atmospheric pressure, after reaction to a certain degree, high temperature vacuum devolatilization is carried out to obtainthe terpolymer. Compared with the prior art, the preparation method provided by the invention has the advantages of simple process, no waste water, and environment-friendly production process, and theprepared product has high purity, and is suitable for use as a low odor and low emission heat resistant agent for vehicle ABS and household appliance ABS.
Owner:嘉兴华雯化工股份有限公司
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