Optical brightener BAC 363, also known as Fluorescent Brightener 363, is a fluorescent whitening agent (FWA) that is commonly used in the textile industries. It belongs to the family of stilbene-based FWAs and has a chemical structure of bis(2-benzoxazolyl)stilbene.

FWAs like BAC 363 work by absorbing ultraviolet light and re-emitting it as visible blue light. This results in an increase in the perceived whiteness and brightness of the treated material. BAC 363 is particularly effective at brightening acrylic and blends.

There are many different types of optical brightener agent for textile,optical brightener BAC 363 CAS NO.:95078-19-6 is a special brightener for acrylic fiber. 

Property indicator:

Appearance: light brown liquid

Lonicity: Cationic

Main ingredients: Benzimidazole derivatives

Tint Shade: Neutral to bluish light

PH: 3-4 

Performance characteristics:

1. Suitable for whitening processing of acrylic fabrics and diacetate fabrics;

2. Suitable for exhaustion and continuous processing;

3. Very stable to chlorous acid and hypochlorous acid compounds;

4. Excellent light fastness and wet fastness properties;

5. This product is a special whitening agent for acrylic fiber, which can achieve extremely high whiteness effect with only a small amount. 

How to use optical brightener BAC?

• General processing technology of acrylic fiber

  Dosage: Optical brightener BAC-L 0.2-2.0% o.w.f

  Formic acid or oxalic acid to adjust pH-3.0-4.0

  Process: 95-98℃×30-45min

  Bath ratio: 1:10-40

• Chlorine bleaching process of acrylic fiber

   Dosage: Optical brightener BAC-L 0.2-2.0% o.w.f

   Sodium nitrate: 1-3g/L

   Formic acid or oxalic acid to adjust pH-3.0-4.0

   Sodium chlorite: 1-2g/L

   Process: 95-98℃×30-45min Bath ratio: 1:10-40

• Acrylic/Wool Blended Fabric Processing Technology

 A. oxygen bleaching process

     Hydrogen peroxide 35% 10-20 ml/l,

     Sodium pyrophosphate 1-2 g/l

     Ciba ULTRAVON CN 1-2 g/l

     PH 8-9 (ammonia water is recommended)

     Temperature × Time: 50-55 ℃ × 2-3 hours,

     Liquor ratio: 1:10-40 

B. Acrylic fiber whitening process

    Optical brightener BAC-L 0.5-2% o.w.f,

    Formic acid or oxalic acid to adjust pH-3.0-4.0

    Temperature × time: 95-98℃ × 30 minutes,

    liquor ratio: 1:10-40

C.wool reduction bleaching and whitening process

   Optical brightener BAC-L 0.25-1.0g/L

   Stabilized hydrosulfite 1-3g/L

   PH 5-6

  Temperature × time: 50-60 ℃ × 60-120 minutes

 These are the usage amounts of liquid Optical brightener BAC given by us. It can be seen from the above that only a small amount of BAC 363 can achieve a very bright effect. Cost savings can be achieved from another perspective.

Package:

30kg plastic drum or according to user requirements. 

Precautions:

1. This product is a special brightener for acrylic fiber. It must be dyed with sodium chlorite in the same bath to achieve the ideal whitening effect. It is best to use low-hardness water to process during dyeing to ensure BAC-L performance better.

2. This product will release chlorine dioxide and strong acid during processing, which has a certain corrosive effect on the equipment. Please be sure to use a stainless steel dyeing vat dyeing machine and add sodium nitrate to reduce damage to the equipment.

Why Choose Liquid Optical Brightener BAC 363

Liquid Optical Brightener BAC 363 is a type of optical brightening agent commonly used in the textile industry to enhance the whiteness and brightness of fabrics. It is a fluorescent dye that absorbs ultraviolet light and emits visible blue light, giving the fabric a brighter, more vivid appearance. Here are some reasons why you might choose Liquid Optical Brightener BAC 363:

Effective whitening: Liquid Optical Brightener BAC 363 is known for its ability to effectively whiten and brighten fabrics, even at low concentrations.

Compatibility: Liquid Optical Brightener BAC 363 is compatible with a wide range of fabric types, including cotton, polyester, and blends.

Cost-effective: Compared to other optical brightening agents, Liquid Optical Brightener BAC 363 is relatively inexpensive, making it an attractive option for manufacturers looking to reduce costs.

Easy to use: Liquid Optical Brightener BAC 363 is a liquid, which makes it easy to handle and apply to fabrics during the manufacturing process.

However, it's important to note that the choice of optical brightening agent depends on the specific requirements of the application, and factors such as the type of fabric, the desired level of brightness, and the manufacturing process should be taken into consideration before making a selection.