Optical Brighteners

OB-PF

Also Known As:C.I. C.I. 135C.I. 135

Light yellow crystal powder, not dissolve in water, can dissolve in a lot of organic solvents, excellent fastness to light transfer. Mainly used for whitening and brightening of PVC, and high-grade papers.

OB-PF - 1

Key Features

Excellent fastness to light transfer
Soluble in many organic solvents
Can be milled to slurry for polyester fiber

Technical Specifications

C.I. NO.C.I. 135
CAS Number12224-12-3
AppearanceLight yellow crystal powder
Purity≥98%
Melting Point186-188°C
Molecular FormulaC18H14N2O2

Physical Data & Fastness Properties

Shade/ToneRed
Heat Resistance300°C
Light FastnessExcellent
Weather FastnessExcellent

Application Fields

This product is widely used in the following application fields, providing excellent coloring performance and durability:

  • PVC whitening and brightening
  • High-grade papers
  • Polyester fiber (as slurry)

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Usage Instructions

Mainly used for whitening and brightening of PVC, and high-grade papers. Can be milled to the slurry for whitening of polyester fiber.

Frequently Asked Questions

What is OB-PF used for?

OB-PF is mainly used for transparent coloring of PVC whitening and brightening, High-grade papers, Polyester fiber (as slurry), and can also be used for masterbatch production.

What are the key properties of OB-PF?

OB-PF offers a heat resistance of 300°C, and has light fastness rated Excellent.

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