What is an optical brightener ?

---

---

What is an optical brightener ?

Optical brighteners, optical brightening agents (OBAs), fluorescent brightening agents (FBAs), or fluorescent whitening agents (FWAs) are chemical compounds that absorb light in the ultraviolet and violet region of the electromagnetic spectrum (typically 340-370 nm) and re-emit light in the blue region of the spectrum (typically 420-470 nm) through fluorescence. These additives are frequently used to improve the color of Plastic, paper, and fabric, creating a "whitening" effect.

They reduce the perceived yellow/orange color of naturally yellow/orange materials by making up for the material's lack of blue and purple light reflection with the fluorophore's blue and purple optical emission.

 

Optical brightener uses –

Optical brighteners use ultraviolet (UV) light waves to boost blue light and reduce yellow light, making things look whiter. As a result, they do not clean your product but rather make them look whiter and brighter. They stick to your clothes because they can survive the heat and even chemicals like bleach. You can identify optical brighteners using a specific UV or black light, which will make your Product sparkle.

Papers, fabrics, plastics, paints, printing inks, and cosmetics are all made with optical brighteners. They also identify wastewater leaks, aid in medical diagnosis, and eradicate agricultural pests.

 

What is an optical brightener made of?

Optical brighteners, also known as fluorescent whitening agents (FWAs), are water-soluble hydrophilic chemicals in laundry detergents. They primarily consist of anionic diamino stilbene (DAS) or Di styryl biphenyl (DSBP) derivatives with negligible aquatic toxicity. The most commonly used DAS chemical (FWA-1) acute aquatic toxicity is greater than 337 mg/l for fish and more significant than 1000 mg/l for daphnia. The equivalent values for the most often used DSBP representative (FWA-5) are 76 and >1000 mg/l, respectively [12]. The two compounds' long-term aquatic toxicity is also mild, with a NOEC = 62 mg/l (14-day fish test) for FWA-1 and one mg/l (fish embryo-larve test) for FWA-5.

The NOEC values for daphnia and algae are 1 and 7.5 mg/l and 25 and 3.1 mg/l, respectively. The findings on terrestrial toxicity demonstrate no obvious ecotoxicity: both compounds have an EC50 > 5000 mg/kg for earthworms, but the NOEC for the same organism is 1.37 mg/kg. Again, a recent environmental risk evaluation of the two optical brighteners revealed no evidence of ecological danger.

 

What is the function of an optical brightener?

Optical Brightening Agent Types

Brightening agents are classified into three kinds based on the amount of sulphonic groups.

 

1) Optical Brightening Agents Disulfonated

 

Two sulphonic groups make up these optical brighteners. Because of their chemical makeup, these agents are hydrophobic in nature. Said the solubility of these OBAs is relatively low. They are typically employed at the wet end.

 

 

2) Tetrasulfonated varieties

 

These brighteners comprise four sulphonic groups, as the name implies. Brightening agents of this kind have a medium affinity and good solubility. As a result, they are an excellent option in both the wet and dry ends. These are the most frequent types of OBAs found on paper and paperboard.

 

 

 

FAQ – Our products –

Quest : How does the optical brightener make whiter plastic? What is an optical brightener, and how does it work?

Ans :

Optical enhancer (OB)
An optical brightener or whitener gives the final product a 'white' appearance. OBs are available in reddish, greenish, and bluish hues, with the latter being the most common. Before the polymerization begins, the OB compound, TiO2, and catalyst are introduced. Typically, 180-200 ppm is applied. Only OB-added plastic is accepted in the market.

UV radiation in sunshine causes the yellowing of polyester mixed with a white cloth. The presence of OB in the polymer prevents the fading of white fabric.

Optical brighteners boost colors and make plastic appear whiter and brighter by masking the natural yellowness of polymers; they are typically added to improve the aesthetics and consumer appeal. Optical brighteners are frequently used with other colorants to create the desired hue for the application. Brighteners have a high melting point and are easily dissolved in molten polymers. The two most prevalent optical brighteners in the plastics sector are bis-Benz oxazolyl-stilbene and bis-Benz oxazolyl-thiophene.

Fluorescent whitening agents are another name for optical brighteners. These additives absorb UV light and re-emit it in the visible blue range when exposed to UV or black light. Tracer additives might help with this fluoresce behavior. Tracers are extremely useful in quality control, monitoring homogeneity and defects in laminates and examining additive dispersion in the polymer matrix.

 

Optical Brightener(OB1) Properties →

Product Name	MDPC- OB1
Description	Optical Brightener
CAS No.	1533-45-5
C.I. No.	393
Appearance	Yellowish Green Powder
Molecular Formula	C₂₈H₁₈N₂O₂
Molecular Weight	414
Melting Point	357~361℃
Purity	≥98.5%
Particle size	≧100
Ash	≦0.1%
Uses	Mainly used in whiteing of Polester and Plastic, Nylon during polymerization

Read more About OB1 >>

 

Optical Brightener(OB2) Properties →

Product Name	MDPC- OB2
Description	Optical Brightener
CAS No.	40470-68-6
C.I. No.	378
Appearance	Slight Yellowish powder
Molecular Formula
Molecular Weight	400
Melting Point	175~200℃.
Purity	≥95%
Particle size	≧100
Ash	≦0.1%
Uses	Mainly used in whiteing of Plastic such as PVC, PS, ABS, TPR etc.

Read more About OB2 >>

 

Optical Brightener(Uvitex) Properties →

Product Name	MDPC-Uvitex OB
Description	Optical Brightener
CAS No.	40470-68-6
C.I. No.	184
Appearance	Slight Greenish Yellow Powder
Molecular Formula	C₂₆H₂₆N₂O₂N₂
Molecular Weight	430
Melting Point	200~202℃.
Purity	≥99%
Particle size	≧100
Ash	≦0.1%
Uses	Mainly used in whiteing of CPW(Chlorinated Paraffin Wax), PVC(Poly Vinyl Chloride), PP(Poly Propylene), Paints & Inks etc.

Read more About Uvitex >>

 

Usage

In Polymer, Fiber, Plastics, ABS, PVC, etc

 

Additional Information

Packaging Details

Standard Packing x Kg, Other Customised Packing also available.

 

Preferred Buyer From

Location : Anywhere in India

 

What are we?

1. We at MAA DURGA POLYCHEM (MDPC) produce and sell high-quality Optical Brightener OB-1. Brightener OB-1 is another name for Optical Brightener OB-1. Brightener OB-1 is a luminous whitening agent with a high molecular weight that considerably enhances the whiteness of textile fibers and polymers.

2. Brightener OB1 generates exceptionally bright white with a faint reddish blue effect compensating for yellowing. It has a high light fastness.
3. Optical Brightener OB-1 is currently widely utilized in the plastic industry due to its great whitening capabilities, excellent heat resistance, low volatility, and ease of dispersibility.
4. It has adaptability in various substrates; in combination with dyes, it produces bright shades. Brightener OB1 is used in polymer fibers, especially polyester and polyamide fibers. It is also widely used in PP, ABS, PS, HIPS, PA, PC, EVA, Rigid PVC, etc.
5. MDPC is the country's leading importer, exporter, and trader. In 2015, an ISO-certified corporation was formed in Delhi
6. MDPC is a polymer specialist specializing in Optical Brightener (OB), Titanium Dioxide (TiO2), PVC Heat Stabilizer, and over 20 additives. MDPC offers a one-stop solution for whiteness and brightness in the polymer industry.

 

Industrial experience!

1. MDPC is the country's leading importer, exporter, and trader. In 2015, an ISO-certified corporation was formed in Delhi.
   
2. MDPC is a polymer specialist specializing in Optical Brightener (OB), Titanium Dioxide (TiO2), PVC Heat Stabilizer, and over 20 additives. Providing a one-stop shop for whiteness and MDPC and brightness in the polymer industry.
3. MDPC Optical Brightener (OB) is one of our exclusive products available for a wide range of applications such as footwear, PVC Pipes & Fittings, LLDPE Films, Masterbatches, CPW (Chlorinated Paraffin Wax), Therma Plastic Road Paint, and so on. It improves the whiteness and brightness of products, reduces yellowing, and adds excellent heat resistance by absorbing UV radiation and giving the products a smooth white glow.
4. MDPC offers a wide range of Optical Brighteners (OB), Titanium Dioxide (TiO2), Ca-Zn, and One-Pack Stabilizers, among other goods. We are a diverse organization that serves many specialists and general markets throughout India for wire and cables, footwear, automotive, medical, and toys, among other things.