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Cheap Aluminum Oxide Blast Media 60 Grit USA

Phenolic resin solution is an oligomer (A-stage resin). It contains active methylol in the brown fused aluminum oxide factory molecule and is not very stable in chemical properties. It can be stored at room temperature and can slowly undergo polycondensation reaction. The resin viscosity gradually increases and gradually changes to B-stage. Even C-stage resin. Wash 4 ~ 5 times with water, add 0.5mol / L accurately with a brown aluminum oxide 70 grit burette.


Cheap Aluminum Oxide Blast Media 60 Grit USA MOQ: 1 Ton! 19 Years Experience Aluminum Oxide Blast Media Manufacturer, 35,000m² Workshop Area, Free Samples, Fast Delivery!


If you want to buy cheap aluminum oxide blast media 60 grit, please click our products: Brown Fused Aluminum Oxide or White Aluminium Oxide or Black Aluminum Oxide or Pink Aluminum Oxide for more information!


At present, domestically manufactured resin abrasives use two steel grid manufacturing processes, namely liquid resin abrasives and powdery resin abrasives, depending on the resin form. The abrasive tool also requires control of the properties of the phenolic resin solution during the white aluminium oxide manufacturer production process, and technical conditions are proposed. This was repeated 3 to 4 times, and then all the samples in the beaker were washed into the funnel.


The phenolic resin liquid used in liquid resin abrasive tools is used as a binding agent, the brown fused alumina phenolic resin liquid used in powder resin abrasive tools is used as a wetting agent, mainly used to wet the abrasive and dissolve the resin powder. The viscosity, free phenol content, and solid content of the phenol resin resin solution significantly affect the mechanical properties of the abrasive tool. According to the same reagent and operation method, brown aluminum oxide blast media use distilled water for blank test.


Weigh 1 to 1.5 g of the garnet suppliers sample into a 250 mL branched-bottomed round flask using the weight loss method, add 20 mL of 95% ethanol, add 20 mL of water after dissolution, and pass in water vapor for 1.5 to 2 hours until the distillate is free of phenol (using saturation Bromine water inspection showed no white precipitate), dilute the receiving bottle with water to the mark, white aluminum oxide 220 grit shake well, pipet 50mL of the test solution into an iodine volumetric flask.


Close the brown aluminum oxide stopper immediately, shake it and place it in cold water (below 15 ° C) for 15 minutes, add 2 g of potassium iodide, shake it to dissolve, leave it for a while, remove the stopper, and wash the bottle wall and stopper with a little water. Immediately titrate to a pale yellow with a 0.1 mol / L sodium sulfate standard solution, mainly used for bonding abrasives; add 2 mL of human starch solution, and white fused aluminum oxide 60 grit continue the titration until the blue color disappears as the end point.


In order to determine the phenol content, at least two tests must be performed, and the glass bead blasting media suppliers arithmetic average value is taken during the calculation. Weigh 3 g of a sample into a 100 mL beaker, add 50 mL of water, and stir well to dissolve the urotropine in water. After standing for a while, and add 0.1mL mol / L potassium bromate bromide solution 25mL with a burette, the solution was filtered into a 250 mL glass dish by brown aluminium oxide manufacturer pouring, and then 30 mL was poured into the beaker and filtered. 


50mL of sulfuric acid solution in a glass dish, put the glass dish on a boiling water bath and brown aluminium oxide evaporate to 3 ~ 5ml. Add if there is still a pungent odor of formaldehyde. Water 20 ~ 30mL, repeatedly evaporated until no formaldehyde smell. Remove and cool, add 100 mL of water to dissolve all crystals, and add 2 drops of methyl orange indicator. Titrate with 1 mol / L sodium hydroxide standard solution to yellow as the end point, brown fused alumina for grinding add 1: 10 mL of 1 hydrochloric acid.


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Brown Fused Alumina And White Fused Alumina MOQ: 1 Ton! 19 Years Manufacturing Exprience, 35,000m² Workshop Area, Factory Price, Free Samples, Fast Delivery!

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