443

196 – 203^oC

0.3% max

0.5 % max

60 – 200 meshs

Soluble in chloroform, sparingly soluble in ethyl acetate, Insoluble in water and methanol.

Properties :

Indo white OB is highly effective in polymer such as engineering plastics can be widely used in fibres molded articles, films and sheets. Indo white OB perform excellent resistance to heat, remarkable whitening properties, good light fastness and low volatility. It has good solubility in organic solvents and good compatibility in various materials.

0.1 g – 1g

10 g – 50 g

0.1 g – 1g

1g

10 g – 50 g

10 g – 50 g

0.5g – 1g

5 g – 50 g

The above dosage is for the reference of white color products only

Attention:

Mix thoroughly to obtain best effect

Indo white – OB 1 for plastics

Specifications :

Yellowish or yellowish green crystal powder

C₂₈H₁₈N₂O₂

414.4

353 – 359c

Max 0.5%

Free of odor

60 -200 mesh

Indo white OB 1 belongs to the class of stilbene benzoxazol. It is high molecular weight optical brightener having excellent resistance to heat good light fastness and low volatility and is suitable for various polymers at all stages of processing.

Properties:

OBA function by absorbing ultraviolet radiation and remitting blue light. The emitted blue will reduce the yellow colour of polymer. Indo white Ob performs excellent resistance to heat, remarkable whiter effects, good light fastness and very low dosage.

Dosage for reference (in each 100 gm polymer) :

2.5 g – 5.0 g

2.5 g – 25 gm (not more than 30 gm)

The above dosage is for the reference of white color product only when using OB 1. i.e colorful products.

Improving whiteness of recycled polymer:

Indo white OB 1 will greatly improve the whiteness by providing a more uniform white to the recycled material. Normal fiber application require only 200-300 PPM in new polymer but, recycled material may require as much as 300-450 PPM

Attention :

Mix thoroughly to obtain best effect