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Optical Brighteners

Optical Brighteners are added to many materials to reduce yellowing, improve whiteness and to enhance the brightness of a product.


We introduce the following Optical Brighteners


  • Optical Brightener OB
  • Optical Brightener OB-1

Above Brighteners give very brilliant whitening shades in following applications :


  • Fiber like polyester, Polyamide & PP.
  • Plastics like PS, HIPS, ABS, PC, Polyolefin’s, Rigid PVC etc.
  • Detergents, Soaps, Papers etc.
  • Inks, Paints, Films etc.

 


Optical Brightener OB
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Business Type : Exporter, Supplier, Importer

Product Details

CI No. 184
CAS No. 7128-64-5
Chemical Name 2,5-thiophenediylbis(5-tert-butyl-1,3-benzoxazole)

Specification

APPEARANCE Pale Yellow Crystalline Powder
MOLECULAR FORMULA C26 H26 N2 O2S
MOLECULAR WEIGHT 443
MELTING POINT 198 ± 30C
SPECIFIC GRAVITY 1.26
λMAX (CHCI3) 375 nm
ASSAY: 99% (Min)
ASH 0.5% (Max)
VOLATILE MATTER 0.5% (Max)

VOLATILITY

TGA heating rate 20OC/min in air
Temperature (oC)
Volatility
Weight loss (%)
280 1
310 2
325 5

LIGHT FASTNESS IN VARIOUS SUBSTRATES:

SUBSTRATES Light Fastness (on Blue scale)
PVC 4-7
PE 2-4
PP 1.-4
Cellulose Acetate 5-7
PS 2-5
Acrylic Resin Lacquers-- 4-5
Polyamide 3-5
Liner Polyester 7

SOLUBILITY

SOLVENT % SOLUBILITY
ETHANOL 0.1
ACETONE 0.5
MEK 1.3
TOLUENE 5.3
CTC 5.9
DMF 0.8
CHLOROBENZENE 10.2
DOP 0.7
ETHYL ACETATE 1.1
MEG 0.2
CYCLOHEXANONE 3.3
XYLENE 5

Structure

Structure

Preferred Buyer From

Location Anywhere in India

Optical Brightener OB is a high molecular weight fluorescent whitening agent which significantly improves the whiteness in thermoplastics, printing inks, Lacquers, Manmade fiber etc.

 

Optical Brightener OB Produces very brilliant white with light reddish Blue effect to, which compensates for yellowing to. It has good light fastness in substrates, excellent resistance to heat, high chemical stability, Soluble in a wide range of organic solvents. It gives Brilliant, Bluish white effect.

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Optical Brightener OB-1
Get Best Price

Business Type : Exporter, Supplier, Importer

Product Details

CI No. 393
CAS No. 1533-45-5
Chemical Name 4,4’ – bis (benzoxazol – 2 – yl) stibene

VOLATILITY

TGA heating rate 20OC/min in air
Temperature (oC)
Volatility
Weight loss (%)
380 0.2
350 2.2
400 19.4

Specification

APPEARANCE Pale Yellow Crystalline Powder
MOLECULAR FORMULA C28 H18 N2 O2
MOLECULAR WEIGHT 414.4
ODOUR ODOURLESS
MELTING POINT 357 ± 50C
SPECIFIC GRAVITY 1.35
ASSAY: 0.99
ASH 0.5% (Max)
VOLATILE MATTER 0.5% (Max)
λMAX (Ethanol) 374 nm (Absorption)
SOLUBILITY Insoluble in water, Methanol,
Acetone, Chloroform, at 25oC

Structure

Structure

Preferred Buyer From

Location Anywhere in India

Optical Brightener OB-1 is a high molecular weight fluorescent whitening agent which significantly improves the whiteness in both textile fibers and plastics.

 

Optical Brightener OB – 1 produces very brilliant white with light reddish Blue effect which compensate for yellowing. It has good light fastness. Because of it’s exceptional whitening properties, excellent resistance to heat, low volatility and easy dispersibility it is now widely used in plastic market. It has good compatibility in various substrates, in combination with dyes it produces bright shades.

 

Brightener OB – 1 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.

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