What type of precipitated barium sulfate meets national standards?

Gemme

02-18-2020 16:39:24

Precipitated barium sulfate is an amorphous white powder. It is non-toxic, insoluble in water, soluble in fuming sulfuric acid, and slightly soluble in boiling hydrochloric acid. It has stable chemical properties and can be reduced to barium sulfide when heated with carbon. It does not change color when exposed to hydrogen sulfide or toxic gases in the air.

**Molecular Formula:** BaSO4

**Molecular Weight:** 233.40 (according to the 1979 International Atomic Weights Table)

**Functional Characteristics:** Precipitated barium sulfate is an amorphous white powder. It is non-toxic, insoluble in water, soluble in fuming sulfuric acid, and slightly soluble in boiling hydrochloric acid. It has stable chemical properties and can be reduced to barium sulfide when heated with carbon. It does not change color when exposed to hydrogen sulfide or toxic gases in the air.

**Applications:**
- Can be used as a filler for powder, coatings, paints, inks, rubber, and plastics.
- When mixed with pigments like titanium dioxide, it can reduce pigment usage by about 30% and lower costs when used in rubber and plastic.
- Adding about 25% precipitated barium sulfate (according to different formulations) to polypropylene (PP) can give it a surface appearance similar to ABS without affecting the inherent properties of PP, providing a high gloss and hard surface.
- Precipitated barium sulfate can achieve a filling rate of up to 80% by weight and is effective in sound insulation when used in drainage pipes, speakers, and audio equipment.

**Additional Uses:**
- In powder coatings, precipitated barium sulfate offers high gloss, good leveling, strong weather resistance, and stable chemical properties.
- For home appliance casings, it provides high gloss, good color, scratch resistance, and dimensional stability.

**Usage in Specific Products:**
- Precipitated barium sulfate can replace titanium dioxide completely.
- It is used in downstream products of titanium dioxide such as potassium fluotitanate, polyethylene flame retardant masterbatch, degradable resin, PVC door and window profiles, paints, and various alkyd resin paints.
- High-grade products produced according to national standards can meet general usage requirements. Superior grade products, with good dispersibility, narrow particle size distribution, high barium sulfate content, and no impurity particles, can be widely used in high gloss and high weather resistance material applications.
- Ultra-fine modified precipitated barium sulfate, as a superior grade product, is produced using unique ultra-fine processing methods and post-treatment processes, optimizing all physical and chemical indicators for use in high gloss powder coatings and high-grade plastic products.