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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.
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
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 its 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.
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
These dyes are heat stable at customary processing temperatures which are higher than that of Polyolefin. These dyes do not sublime from polymer melt during processing cycles used to prepare polymer / master batch blends for final processing.
Light fastness of these polymer soluble dyes are generally excellent in strong and transparent shades. These dyes are suitable for Engineering plastic such as Polystyrene, HIPS, ABS, SAN, Polycarbonate, PET etc.
For specific use of these dyes in food packaging analysis as required can be arranged (with suitable arrangements).
Dyes under this series are not recommended for Polyolefin as migration of color from the finished product is likely to be unacceptable. User should check their suitably in stretched polymer product.
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
.Additional Information:
Packaging Details : Standard Packing 25 Kg, Other customised packing's also available.
