32results about How to "New formula design" patented technology

The invention discloses a PVC composite material for a drainage pipeline and a preparation method of the PVC composite material, and relates to the technical field of drainage pipeline production formulas. A tire tread is prepared from the following raw materials, namely butadiene styrene rubber composite materials, in parts by mass: 80-95 parts of butadiene styrene rubber, 8-10 parts of phenolic resin, 3-8 parts of 2,6-di-tert-butyl-4-methylphenol, 2-5 parts of aedelforsite, 3-6 parts of magnesium carbonate, 4-8 parts of calcium stearate, 1-3 parts of trioctyltrimellitate, 1.5-4 parts of diphenyl silanediol, 2-7 parts of coumarone resin, 0.5-1.5 parts of rosin, 1-3 parts of maleic anhydride, 2-5 parts of ammonium persulfate, 1.5-3 parts of phthalic anhydride, 0.5-2 parts of sulfur and 3-8 parts of nano calcium carbonate. The PVC composite material for the drainage pipeline is easily available in raw materials, novel in formula design and simple in production process; and the obtained PVC composite material for the drainage pipeline has strong high temperature resistance, wear resistance and ageing resistance and good mechanical properties.

The invention provides a medical silicone rubber and polyvinyl acetate latex co-polymerized rubber plug and a preparation method thereof. The rubber plug comprises auxiliary silicone, polyvinyl acetate latex and a mixed solution. The preparation method comprises the following steps: separately adding the mixed solution to the auxiliary silicone and the polyvinyl acetate latex according to the ratio of 1:1.36, stirring for 10 minutes, taking 20% of mixed rubber comprising the polyvinyl acetate latex and the mixed solution to be mixed with the auxiliary silicone, stirring, adding the remaining 80% of the mixed rubber comprising the polyvinyl acetate latex and the mixed solution after 3 minutes, and continuously stirring for 2 minutes to obtain a colloid; cooling the colloid in air at the temperature of 15 DEG C for 1 day, and slicing to obtain the medical silicone rubber product, namely the rubber plug. The product prepared by the method is higher in chemical stability, free of irritation, high in safety, heat-proof and ageing-resistant, has an excellent mechanical property, and has certain medicine components compared with a common silicone rubber plug when being used as a medicinal liquid bottle plug; when the certain medicine components are combined with normal saline, components which are beneficial to a human body are volatilized, so that a medicinal liquid is prevented from being mixed with toxic components, and safety and benefits are guaranteed.

The invention relates to the technical field of sheet metal part machining, in particular to a phosphating method of a clamp for sheet metal part machining. The method comprises the steps that oil stains on the surface of the clamp are wiped away, and then the clamp is washed with deionized water for 10 minutes and then scrubbed with ethyl alcohol for 5 minutes; the clamp is put into a pretreatment solution preheated to 50 DEG C to be soaked for 60 minutes; after being fished out, the clamp is washed with deionized water till the pH value of the deionized water for washing is restored to be neutral; the clamp is adjusted through a titanium salt table and then put into a phosphating solution for phosphating; after being fished out, the clamp is washed with deionized water till the pH value of the deionized water for washing is restored to be neutral, and then the clamp is dried; and the clamp is put into a constant-temperature furnace to be dried for 5 hours, and the temperature in the constant-temperature furnace is 55 DEG C. The formula and a preparation method of the pretreatment solution are reasonably designed, and therefore fast forming of a phosphating film on the surface of the clamp is achieved, the thickness is uniform, and then the repeated utilization degree of the clamp is increased.

The invention relates to the technical field of machining, in particular to a protective agent for heat treatment for test tool for welding part machining. The protective agent is prepared by 12 parts of polyvinyl acetate emulsion, 15 parts of laurinol polyether sodium sulfate, 0.5 part of banana oil, 0.5 part of alcohol ether glucoside, 15 parts of calcium chloride and 47.7 parts of water. The protective agent is novel and reasonable in formula design; and in particular, a small amount of alcohol ether glucoside is added, so that the treatment efficiency of the protective agent can be prominently improved. Through matching use of the protective agent, when a detector is heated in a subsequent open fire type normalizing furnace, the surface treatment is more uniform.