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4871 results about "Rosin" patented technology

Rosin, also called colophony or Greek pitch (Latin: pix græca), is a solid form of resin obtained from pines and some other plants, mostly conifers, produced by heating fresh liquid resin to vaporize the volatile liquid terpene components. It is semi-transparent and varies in color from yellow to black. At room temperature rosin is brittle, but it melts at stove-top temperature. It chiefly consists of various resin acids, especially abietic acid. The term "colophony" comes from colophonia resina, Latin for "resin from Colophon", an ancient Ionic city.

Laboratory model testing device for tunnel excavation

InactiveCN103616287AHigh simulationAvoid the influence of surrounding fillersMaterial strength using tensile/compressive forcesModel testingEngineering
The invention discloses a laboratory model testing device for tunnel excavation. The laboratory model testing device comprises a model box, a tunnel structure model, a loading device and an excavation device, wherein the model box is composed of a floor trough and an organic glass plate, the organic glass plate is fixed on the opening surface of the floor trough through a groove; model testing fillers are padded in the model box; the tunnel structure model is made of rosin materials in a casting manner according to the ratio of similitude of an actual tunnel section, and is arranged in the middle of the model box; the loading device mainly comprises a counter-force beam, a steel plate and a hydraulic jack, and is arranged on the top of the model box; the excavation device mainly comprises a heating wire, a lead and a power supply switch, wherein the heating wire is arranged in the tunnel structure model. Due to the adoption of the testing device, the shape and size simulation in the tunnel excavation process can be performed conveniently, an excavation boundary can be well matched with a geometric boundary designed in advanced, the simulated tunnel excavation can be relatively well matched with an actual engineering; the testing device is simple in structure, convenient to operate, low in cost, and convenient to develop and apply.

Hot melt adhesive used for automotive interiors, and preparation method of hot melt adhesive

The invention discloses a hot melt adhesive used for automotive interiors, and a preparation method of the hot melt adhesive. The hot melt adhesive used for automotive interiors is characterized by comprising a proportion of paraffin, polyethylene wax, a thermoplastic elastic body SBS, random polyolefin, polyethylene vinyl acetate, C5 petroleum resin, rosin pentaerythritol ester, antioxygen, coupling agent and filler. The preparation method comprising the following steps: heating a stirring kettle to 140 to 160 DEG C, and adding the paraffin and the polyethylene wax; adding the thermoplastic elastic body SBS, vacuum-pumping and keeping warm, adding HMW(high molecular weight) random polyolefin I, HMW random polyolefin II and the antioxygen; adding the coupling agent and the filler; cooling, and adding polyethylene vinyl acetate I and polyethylene vinyl acetate II; cooling and adding the C5 petroleum resin; adding the rosin pentaerythritol ester and keeping warm; and emptying the stirring kettle, pressurizing, discharging and forming. No pollution or poison is produced during the production process of the hot melt adhesive; and the hot melt adhesive has the advantages of high adhesion strength, long opening time, good temperature resistance, strong ageing resistance, good tenacity, strong waterproofness and the like.

Slow controlled release diatomite fertilizer

The invention relates to a slow controlled release diatomite fertilizer which is characterized in that 16 to 20 portions of urea, 12 to 17 portions of diammonium phosphate, 10 to 15 portions of potassium chloride and 8 to 12 portions of diatomite are put in a pulverizer to be crushed and sieved by a 80-mesh sieve and then are put in a granulator to be granulated by a rotary drum; 50 to 100ml water is added slowly and uniformly to be used as coupling agent during the granulating process; after the granulation, 100 to 120ml coating material of polyvinyl alcohol is sprayed to rotating fertilizer particles by a high-pressure spray gun uniformly in small amount; after coating, rosin and olefin are poured into the rotary drum based on the proportion of 1 to 2 to be melted and made into sealant; the temperature is kept between 70 DEG C to 80 DEG C; and finally, the coated fertilizer is poured into the rotary drum to be sealed. The invention can separate the soil from the fertilizer, avoids the direct contact of the soil and the fertilizer and controls the release of nutrient; the slow controlled release diatomite fertilizer has the functions of preserving moisture and fertility, prolonging the fertilizer effect by slow release and improving the soil; and the slow controlled release diatomite fertilizer causes no pollution to the soil.

Rosinyl quaternary ammonium salt type gemini surfactant and method for preparing same

InactiveCN101284794AImprove surface activityLow surface tension agent critical micelle concentrationOrganic compound preparationTransportation and packagingFiltrationSolvent
The invention discloses a rosinyl bis-quaternary ammonium surfactant, the general molecular formula of which is as follows. In the formula, R is a rosinyl ricyclic diterpene structure, X is Br or I, and n is larger than or equal to 1 and smaller than or equal to 10. The invention also discloses a method for preparing the compound: firstly, dehydroabietic acid or disproportionated rosin is adopted to prepare rosinyl tertiary amine, and then the rosinyl tertiary amine and saturated dihalide are prepared into the rosinyl bis-quaternary ammonium surfactant through quaternization. The synthesis of the rosinyl tertiary amine comprises the following steps: the dehydroabietic acid or the disproportionated rosin is converted into active acyl chloride intermediate, and then the acyl chloride intermediate and N,N-dimethyl ethanolamine are prepared into the rosinyl tertiary amine in the presence of the triethylamine which is used as the acid-binding agent. The rosinyl tertiary amine and the saturated dihalide are reacted in the solvent isopropyl alcohol, and then vacuum drying is performed after filtration. The prepared surface active agent has good surface activity performance; the raw material is inexpensive and easy to obtain, and can be biodegraded; the synthetic method is assisted with microwave, the reaction time is short, and the product purity is high.

Automatic tin soldering machine

The invention discloses an automatic tin soldering machine. The automatic tin soldering machine comprises a machine base, a soldering tin wire passing mechanism, a control box, an automatic feeding mechanism, a soldering tin assembly mechanism, a soldering tin testing mechanism, a rosin infiltration mechanism, a tin soldering mechanism and a sliding table mechanism, wherein the automatic feeding mechanism, the soldering tin assembly mechanism, the soldering tin testing mechanism, the rosin infiltration mechanism, the tin soldering mechanism and the sliding table mechanism are connected with the control box; the automatic feeding mechanism is connected with the soldering tin assembly mechanism, and the soldering tin wire passing mechanism is connected with the sliding table mechanism; the control box is arranged on the front end face of the machine base; the automatic feeding mechanism, the soldering tin assembly mechanism, the soldering tin testing mechanism, the soldering tin wire passing mechanism and the tin soldering mechanism are sequentially arranged at the top of the machine base from left to right; the sliding table mechanism is arranged at the side edge of the soldering tin wire passing mechanism, a wire material is sequentially conveyed to the soldering tin testing mechanism, the rosin infiltration mechanism and the tin soldering mechanism by the sliding table mechanism after the wire material is conveyed to the soldering tin assembly mechanism by the automatic feeding mechanism, so as to be subjected to an automatic tin soldering process, and automatic discharging is realized. According to the automatic tin soldering machine, mechanical automation for charging, processing and the final discharging can be realized, the production efficiency is increased greatly, and the product quality can be guaranteed.

Low solid content halogenide-free water-based type cleaning-free scaling powder

InactiveCN101327552AHigh activitySolve the defect of insufficient wettabilityWelding/cutting media/materialsSoldering mediaWater basedAviation
The present invention relates to a medium-and-high-activity, low-solid-content halideless water-based type wash-free soldering flux which is applicable to the spraying process, the foaming process and the dipping process. The soldering flux is composed of the following weight proportions of substances: 1 percent to 4 percent of promoting agent, 0.5 percent to 1.5 percent of filmerformer, 20 percent to 40 percent of latent solvent, 0.1 percent to 2 percent of wetting agent and 0.01 percent to 0.1 percent of corrosion inhibitor, and the rest is deionized water. The soldering flux of the present invention does not contain halogen and colophony; soldering material can have good spreadability; a PCB board can have good solder permeability; soldering spots are plump and shiny; the surface of the soldered PCB board has no visible residues and is not eroded, and the surface insulation resistance is high; under the normal temperature, the soldering flux does not absorb moisture and cannot be decomposed, and a washing process can be omitted. Since the deionized water is used as solvent, the soldering flux does not contain any volatile organic substance, so the soldering flux cannot be ignited and does not explode, and therefore the soldering flux is environment-friendly. The soldering flux is applicable to the wave-soldering or dip-soldering production line of various printed boards in the fields of communication, aviation, computers, etc.

Method and device for measuring concentration of coal dust in mine based on data fusion

ActiveCN103969162AControl the risk of pneumoconiosisOvercome the shortcomings of only measuring large particles but not small particlesParticle suspension analysisNerve networkLight energy
The invention provides a method and a device for measuring the concentration of coal dust in a mine based on data fusion. The method comprises the steps of measuring the concentration of particles with the particle size a which is greater than or equal to 5 microns and the concentration of small particles with the particle size a which is less than or equal to 5 microns by collecting the scattering light energy near the coal dust which forwards +/- 8 degrees and backs +/- 180 degrees; preprocessing light signals; setting the number of nerve cells on a hidden layer of a nerve network; performing nerve network training identification on collected sample information to be treated so as to gradually reduce an error to be within a required range; correcting nerve network data fusion model parameters acquired by multiple layers of forward nerve networks BP according to Rosin-Rammler function distribution of the particle size of the coal dust; calculating the concentration of the coal dust in the space by inputting the concentration value of the large particles and the concentration value of the small particles into a corrected nerve network data fusion model. The method and the device realize reasonable dust measurement and control on a coal mine and have an important significance for control over the pneumoconiosis possibility of workers.
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