Product Details

1. Quick details

Product name: OPTICAL BRIGHTENER OB-1 (GREEN/YELLOW)

Chemical name: 4,4′-Bis(2-benzoxazolyl) stilbene

CAS NO.: 1533-45-5

C.I.NO.: 393

Molecular formula: C₂₈H₁₈N₂O₂

Molecular weight: 414.4

2. Physical and chemical index:

1) Appearance Yellow greenish powder

2) Content ≥98.0%

3) Melting point 353 — 359℃

4) Mesh size ≥800mesh (or customize)

3. Product features

High whitening intensity and strong fluorescence

Extensive application scenarios

Excellent thermal stability and weather resistance

Less dosage

4. Application

Polyvinyl chloride (PVC) is a kind of polymer polymerized by vinyl chloride monomer (VCM) in peroxide, azo compounds and other initiators or under the action of light and heat according to the mechanism of free radical polymerization. PVC used to be the most widely used plastic in the world. It is widely used in building materials, industrial products, daily necessities, floor leather, floor tiles, artificial leather, pipes, wires and cables, packaging films, bottles, foaming materials, sealing materials, fibers, etc.

Optical brighteners, also called optical brightener agent or fluorescent whitening agent, is a kind of fluorescent dye, or white dye, and it is a complex organic compound. It can absorb the invisible ultraviolet light and convert into the longer wavelength blue light, which superposed with the yellow light emitted by the plastic raw material itself, than give the white light after the complementation. So that the white light emitted by the plastic increases. The naked eye can feel that the white plastic becomes brighter and whiter obviously. Optical brightener has a group of products suit for different end using such as fiber, fabric, plastics, detergent, paint & coating, ink and so on.

Optical brightener 393 (OB-1) is kind of optical brightener for PVC (Polyvinyl chloride). It’s also suitable for various of polymers. In the family of optical brighteners for plastic, it’s especially good optical brightener for rigid PVC. The application of optical brightener OB-1 for PVC contains vast of products like PVC pipes and tanks (gutters, drinking water pipes, air duct, casing and so on), PVC profile (window frame), PVC decoration materials (buckle plate, floor & wall, garden fence and so on), PVC film and foamed PVC products, just named a few. Except the PVC products, it’s also an optical brightener for PVC master-batch.

The primary package is 0.06mm thickness pharmaceutical grade PE bags, double liners. The secondary package is usually 25kg fiber drum with wooden lead and iron hoop. We can also customize package according to your requirements. We have experience on customizing 25kg cardboard cartoon, 10kg cardboard cartoon, 10kg fiber drum and 5kg small plastic bag in 25kgs drum. Welcome to send us your specific requirements on package.

We put air bags between the gap of 2 neighborhood pallets. We put covered cardboard around the cartoons on pallet on requirement. We use net at container door to prevent cargo falling down when open the door. Any better suggestion on how to load and protect the goods will been taken by us.

Are you a manufacturer, trading company or a third party?

We are a manufacturer, We were established in 2006.

Where is your factory located?

Our factory address is : No.9 Makou Industrial Park, Wuxue City, Hubei Province, China.

How many square meters of your factory?

More than 120000 square meter.

What’s the highest temperature that OB-1 can resist?

The melting point of OB-1 is 353-359℃, it is the only one optical brightener who can be used in environment over 300℃.

Is the whitening and brightening effect of OB-1 stable?

Yes, it has the characteristic of good heat resistance, light resistance, chlorine bleaching resistance and migration resistance.

What is the Recommended dosage of OB-1 in PVC products?

A: The dosage depends on the proportion of the virgin material and the recycled material. For 100% virgin PVC, the dosage we recommend is as below:

From this chart, you can see, it’s important to control the dosage in appropriate percentage, over dosing will cause contrary effect. (the whiteness value in chart is only for demonstration,it’s not actual test value)

1. We’ve been dedicating in producing OB-1 since 2006. Our product quality and commercial honesty has been tested by the market.

2. We are factory. Buying from us directly will not only give you cost advantage, but also first hand of market information and stable supply.

3. We have more than 120 employees, including 8 senior engineers, 40 backbone technical personnel, and long-term employed domestic well-known professors as technical consultants. It also has long term cooperation with a number of chemical engineering colleges/universities and scientific research institutions.

We are the outstanding supplier of one famous international brand.

http://www.hongxinchemical.com/