Optical Brightener OB-2 for Plastics | CAS No. 2397-00-4

Short Description:

Optical Brightener OB-2 (CAS 2397-00-4) is a fluorescent whitening agent mainly used for plastics and compatible polymer applications. It helps compensate for unwanted yellowish tones through fluorescence, improving the perceived whiteness, brightness and visual appearance of finished plastic products.OB-2 is suitable for a range of compatible plastics, including PP, ABS, EVA, PS and PC, and can also be used in selected synthetic fiber applications.

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Product Detail

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Key Features

Effective Optical Brightening

Optical Brightener OB-2 provides strong fluorescent brightening performance and helps reduce unwanted yellowish tones, improving the perceived whiteness and brightness of compatible materials.

Suitable for Various Plastics

OB-2 is suitable for a range of plastic applications, including PP, ABS, EVA, PS and PC.

High-Temperature Resistance

OB-2 is used in polymer applications requiring good resistance to elevated processing temperatures. Industrial TDS information specifically identifies high-temperature resistance as one of its characteristics.

Suitable for Polyester Applications

In addition to plastics, OB-2 is also reported for fluorescent whitening of polyester and nylon fiber applications.

Water-Insoluble Character

OB-2 is insoluble in water and is reported to be soluble in certain high-boiling organic solvents.

Product Information

Item	Information
Product Name	Optical Brightener OB-2
Alternative Name	Fluorescent Brightener OB-2
CAS No.	2397-00-4
Chemical Name	4,4'-Bis(5-methyl-2-benzoxazolyl)stilbene
Molecular Formula	C30H22N2O2
Molecular Weight	442.51
Main Applications	Plastics and compatible synthetic fiber applications

Typical Applications

Polypropylene (PP)

Optical Brightener OB-2 can be used in compatible PP applications to improve perceived whiteness and brightness and reduce unwanted yellowish appearance.