Bulk Buy Aluminum Oxide Blasting Media Thailand

Add formaldehyde to the reaction kettle(garnet abrasive), start the stirrer, adjust the PH value with sodium hydroxide, heat, and add urea in batches (multiple polycondensation reactions), pay attention to adjust the PH value, And then lower the temperature, vacuum dehydration, adjust the PH value and cooling, urea-formaldehyde resin is simple to manufacture(brown aluminum oxide 16 grit), easy to use, low cost, has a higher bonding strength, better water resistance.

Bulk Buy Aluminum Oxide Blasting Media Thailand MOQ: 1 Ton! 19 Years Experience Aluminum Oxide Blasting Media Manufacturer, 35,000m² Workshop Area, Free Samples, Fast Delivery!

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

Water-soluble urea-formaldehyde resin is a milky white viscous colloid, control the reaction temperature(garnet suppliers), and measure the viscosity change to determine the end point, and its solid content can be adjusted arbitrarily, generally between 60-75%, heat resistance and corrosion resistance(white aluminium oxide super fine). And gradually produce aging cracking phenomenon, the curing is not complete, the amount is too small, water resistance agents and tackifiers.

There is a slight pungent odor, which is mainly because the resin glue contains a certain amount of free formaldehyde(white fused alumina). Since the water-soluble urea-formaldehyde resin is a condensate at the initial stage, it will continue to polymerize and gradually face during storage(aluminum oxide 30 or 40 grit). Therefore, the urea-formaldehyde resin should be stored in a cool place, preferably in a cold store at room temperature 4 ℃, the storage period should not exceed three Months.

It will rapidly solidify in the case of acid and become a viscous jelly(glass bead blasting media suppliers). After complete curing, it will form a hard and brittle solid. The cured urea-formaldehyde resin contains free methylol group, so it is easy to absorb moisture in a humid environment(silicon carbide grit). Gland aldehyde resin glue can not be used alone, but should add an appropriate amount of curing agent, filler and other additives to further improve its performance.

Urea-formaldehyde resin has relatively stable performance in alkaline medium(white aluminum oxide). Although the production process of urea-formaldehyde resin can be adjusted to change its performance and application range, and it must be aided by adding additives(green silicon carbide powder). Therefore, the purpose of the modulation is to change the physical and chemical properties of the urea-formaldehyde resin binder to ensure the improvement of the bonding quality.

Therefore, curing agent must be added to complete the curing of the resin(steel grid). At present, the commonly used curing agents are acidic substances, such as hydrochloric acid, oxalic acid, phosphoric acid, etc., and acidic salts, such as ammonium chloride, zinc chloride, and ammonium sulfate can also be used(aluminum oxide blasting media). The additives to be added during the preparation include curing agents, fillers, formaldehyde binders, anti-aging agents.

Curing agent: Urea-formaldehyde resin can be cured at room temperature or heating, it is not enough, but the curing time is very long, and the adhesive strength is also low(white corundum). The dosage of ammonium chloride should be determined according to the PH value of the resin, the season of use and the requirements on the resin active period(black silicon carbide powder). But the most used is ammonium chloride; too much dosage will reduce the bonding strength.

Generally, the dosage of ammonium chloride is about 0.5 ~ 2% of the resin(low sodium white fused alumina). When adding ammonium chloride, it is advisable to completely dissolve it with cold water or warm water and cool to room temperature, then slowly add the amount to the resin according to the amount, stir while adding, and use as needed(120 grit aluminum oxide blasting media). The amount of filler is generally 10 ~ 50%, and it has no meaning for improving the performance of the resin.