Fluorescent Whitening Agent OB-Zhejiang Hongyi Chemical Co., Ltd.

Fluorescent Whitening Agent OB

C.I.:184 CAS NO: 7128-64-5

Fluorescent Whitening Agent OB, known chemically as C.I.: 184 with CAS NO: 7128-64-5, is one of the most effective and widely used brighteners for plastics and synthetic fibers. It appears as an off-white or light-yellow crystalline powder. It can be added to monomers or pre-polymers before or during polymerization, condensation, or addition processes, and it can also be used as a powder or granules (masterbatch) before or during the molding of plastics and synthetic fibers.

Product Applications

1. Plastics
- PVC (Polyvinyl Chloride): Fluorescent Whitening Agent OB can be used in both rigid and flexible PVC to enhance whiteness. For whitening, the recommended dosage is 0.01-0.05% (10-50g/100kg material). For transparency, use 0.0001-0.001% (0.1-1g/100kg material).
- PS (Polystyrene): In PS, it is used at 0.001% (1g/100kg material) for whitening and 0.0001-0.001% (0.1-1g/100kg material) for transparency.
- ABS (Acrylonitrile Butadiene Styrene): Adding 0.01-0.05% of Fluorescent Whitening Agent OB to ABS effectively eliminates the original yellow hue, achieving a whitening effect.
- Polyolefins (PE and PP): Fluorescent Whitening Agent OB provides good whitening effects in polyethylene and polypropylene. For transparency, the dosage is 0.0005-0.001% (0.5-1g/100kg material), and for whitening, it is 0.005-0.05% (5-50g/100kg material).

2. Coatings and Inks
- Fluorescent Whitening Agent OB is also suitable for use in varnishes, paints, white enamels, coatings, and inks, enhancing the brightness and providing a visually appealing finish.

3. Synthetic Fibers
- In the whitening of synthetic fibers, Fluorescent Whitening Agent OB offers remarkable results, significantly improving the aesthetic appeal of the final product.

Product Advantages

1. Heat Resistance
- Stable Performance: Fluorescent Whitening Agent OB maintains its effectiveness at high processing temperatures, making it ideal for use in thermoplastic processes.
- Durability: It withstands the heat involved in the production of various plastic products, ensuring long-lasting whitening effects.

2. Weather Resistance
- Non-yellowing: Fluorescent Whitening Agent OB prevents yellowing over time, even when exposed to outdoor conditions.
- UV Stability: It offers good resistance to UV light, preserving the brightness and color integrity of the materials.

3. Versatile Application
- Wide Range of Materials: Fluorescent Whitening Agent OB is effective in a broad spectrum of plastics and synthetic fibers, including PVC, PS, PE, PP, and ABS.
- Multiple Forms: It can be incorporated into materials as a powder or in granule form, allowing for flexible application methods.

Product Features

1. Good Whitening Effect
- High Efficiency: Fluorescent Whitening Agent OB delivers significant whitening with minimal quantities, ensuring cost-effective usage.
- Enhanced Aesthetics: The brightening effect improves the visual appeal of plastics and fibers, making products more attractive to consumers.

2. Ease of Use
- Simple Integration: Fluorescent Whitening Agent OB can be easily added to polymers before or during processing, facilitating seamless incorporation into existing manufacturing processes.
- Flexible Dosage: It offers a range of dosages for different materials and desired effects, providing versatility in application.

3. Good Light Fastness
- Longevity: Fluorescent Whitening Agent OB ensures that the brightened effect remains stable over time, even under prolonged exposure to light.
- Color Consistency: It helps maintain uniform whiteness across products, ensuring consistent quality and Appearance.

Product Reference Dosage

- PVC (Polyvinyl Chloride)
- Whitening: 0.01-0.05% (10-50g/100kg material)
- Transparency: 0.0001-0.001% (0.1-1g/100kg material)
- PS (Polystyrene)
- Whitening: 0.001% (1g/100kg material)
- Transparency: 0.0001-0.001% (0.1-1g/100kg material)
- ABS (Acrylonitrile Butadiene Styrene)
- Whitening: 0.01-0.05% (10-50g/100kg material)
- Polyolefins (PE and PP)
- Whitening: 0.005-0.05% (5-50g/100kg material)
- Transparency: 0.0005-0.001% (0.5-1g/100kg material)

1. Introduction:

OB is one of the best whitening agents widely used in plastics and chemical fibers. It can be used in thermoplastics, polyvinyl chloride, polystyrene, polyethylene, polypropylene, ABS, acetate fiber, varnish, paint, white enamel, coatings, and inks. It also has excellent effects on the whitening of synthetic chemical fibers. This whitening agent has the advantages of heat resistance, weather resistance, no yellowing, and good color. It can be added to monomers or prepolymers before or during polymerization, condensation, and polyaddition, or it can be added in the form of powder or granules (i.e. masterbatch) before or during the formation of plastics and synthetic fibers.

2. Physical properties:

Appearance: milky white or slightly yellowish crystalline powder. Melting point: 198-200℃. Fineness: through 200 mesh. Water content: ≤0.5% Ash content: ≤0.2-0.5% Maximum absorption wavelength: 375nm (in ethanol). Maximum emission wavelength: 435nm (in ethanol).

3. Reference dosage:
1. Polyvinyl chloride (PVC):
In hard or soft polyvinyl chloride:
Whitening: 0.01-0.05% (10-50g/100KG material).
Transparency: 0.0001-0.001% (0.1g-1g/100kg material).
2. Polystyrene (PS):
Whitening: 0.001% (1g/100kg material).
Transparency: 0.0001-0.001 (0.1-1g/100kg material).
3. ABS:
Adding 0.01-0.05% to ABS can effectively eliminate the original yellow color and achieve a whitening effect.
4. Polyolefin:
Polyethylene and polypropylene have good whitening effects:
Transparency: 0.0005-0.001% (0.5-1g/100kg material).
Whitening: 0.005-0.05% (5-50g/100kg material).

4. Packaging:
One-kilogram or two-kilogram plastic bag packaging plus carton, 10kg or 20kg per box, or other forms of packaging according to user requirements.

5. Shelf life:

≤24 months at room temperature.