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1、 Product Introduction

Precipitated Barium Sulfate, commonly known as BlancFix, has a molecular formula of BaSO4, CAS: 7272-43-7, and a molecular weight of 233.39. It is a high-purity barium sulfate prepared by chemical decomposition synthesis process, which is different from natural barite powder directly ground from ore.

Appearance: White fine amorphous powder; It is an inert inorganic filler and not a hazardous material.

Mainstream process: produced by reacting barium sulfide solution with sodium sulfate, which can accurately control particle size, purity, and surface characteristics. It is divided into ordinary grade, ultrafine grade, nano grade, and activated modified series.

Different from natural barite core: precipitated barium has higher purity, finer particle size and narrower distribution, higher whiteness, fewer impurities, and excellent dispersibility, and is mostly used in mid to high end products; Barite powder has low cost and is suitable for low-end filling. Barium sulfate precipitation has excellent corrosion resistance and aging resistance, and can partially replace titanium dioxide, saving material costs for the production of coatings.

2、 Basic physical and chemical indicators (industrial general standards)

BaSO4 content: ≥ 98.5% (high-end up to 99%)

Whiteness: 94-98

Relative density: 4.0-4.5g/cm ³

Mohs hardness: 3-3.5

Refractive index: 1.63-1.65

Melting point: 1580 ℃

PH value: 6.5-8.0 (neutral)

Almost insoluble in water, ethanol, dilute acids, bases, and organic solvents; Only soluble in hot concentrated sulfuric acid

3、 Core product performance advantages

Highly chemically stable inert filler, resistant to acid, alkali, salt spray, weather, and corrosion; It is not easy to turn black when exposed to hydrogen sulfide in the air, and is suitable for anti-corrosion and outdoor coatings.

High whiteness, high gloss, stable color, round and delicate particles, improving the smoothness of paint film and plastic surface; Not prone to yellowing, can synergistically enhance with titanium dioxide, partially replacing titanium dioxide to reduce formula costs.

Controllable particle size, good dispersibility, narrow particle size distribution, moderate oil absorption, not easy to coagulate, easy to grind and disperse, excellent paint film flatness and leveling.

High density and weight gain function are much heavier than calcium carbonate and talc powder, suitable for products that require weight gain, sound insulation, and weight distribution.

The X-ray and gamma ray shielding ability can absorb radiation and is used in radiation resistant building materials and medical developing materials.

Low wear, no damage to equipment particles, no sharp edges, and less wear on screws and grinding media during processing.

Good heat resistance, stable at regular processing temperatures, suitable for high-temperature processing of plastics and powder coatings.

4、 Industry Applications (Segmented Fields)

1. Coatings industry (largest application area)

Powder coating, automotive topcoat, industrial anti-corrosion paint, container paint, ship paint, exterior latex paint, coil coating, color paste function: improve gloss, hardness, weather resistance, and chemical resistance; Improve the wear resistance and impact resistance of the paint film; Fill in increments and collaborate with titanium dioxide to enhance coverage; Suitable for acid resistant coating systems.

2. Ink industry (high-end printing ink)

Advantages of offset printing ink, gravure printing ink, UV ink, and environmentally friendly ink: good flowability, high gloss, bright colors, low abrasion printing plates, and less settling during storage, ensuring printing clarity.

3. Plastics and modified plastics

PVC、PP、ABS、PE、PS、 Color masterbatch, household appliance shells, pipes, optical films, degradable plastics, flame-retardant plastics

Improve the surface gloss, hardness, and dimensional stability of the product;

High filling does not significantly affect toughness;

Pipe materials and audio enclosures achieve sound insulation and noise reduction; Curtains and counterweights utilize high-density weight gain;

The transparent film system can maintain a certain degree of transparency.

4. Rubber industry

Ordinary rubber, acid resistant rubber, rubber sheets, conveyor belts, and seals are used as reinforcing fillers to improve the surface smoothness of rubber, enhance aging and acid alkali resistance, and reduce raw material costs.

5. Paper industry

Coat the surface of copperplate paper, coated paper, and art paper with pigments to improve paper whiteness, smoothness, and printability.

6. Other fields

Medicine: High purity grade used as gastrointestinal contrast agent (barium meal);

Radiation resistant materials: protective walls, X-ray room shielding materials;

Battery: electrode plate material;

Ceramics/Enamel/Glass: Glazes, clarifying defoamers, enhance glaze gloss;

Cosmetics: Powder raw materials (requiring high-purity pharmaceutical/cosmetic grade);

Textile: fabric sizing agent;

Adhesive, putty, artificial stone filling material.

5、 Brief usage tips

According to downstream selection specifications: the preferred coating is ultrafine precipitated barium; Plastics can be treated with activated surface modified precipitated barium sulfate to enhance compatibility with resins;

Storage: Dry and ventilated warehouse, moisture-proof, avoid mixing with strong acids;

It is recommended to provide dust removal protection for dust operations. The powder itself is non-toxic, but occupational protection is still necessary for long-term inhalation of dust.