Description

2-Hydroxy-2-Methyl-1-Phenyl-Propan-1-One-2,4,6-Trimethylbenzoyldiphenyl-Phosphine Oxide Mixture is a high-performance, dual-component photoinitiator blend designed for rapid and efficient free-radical polymerization under UV light. This synergistic mixture is critical for achieving deep cure and excellent surface properties in demanding UV-curable formulations. It is an essential raw material for industrial manufacturers in the coatings, inks, adhesives, and advanced materials sectors seeking reliable and consistent curing performance.

Application

• UV-Curable Coatings: For wood, plastic, metal, and paper substrates requiring high gloss, scratch resistance, and fast curing speeds.
• Graphic Arts and Printing Inks: Enables rapid curing in offset, screen, and flexographic printing applications, ensuring high print quality and productivity.
• Industrial Adhesives and Sealants: Provides strong initiation for bonding applications in electronics, automotive, and assembly where fast setting is crucial.
• Optical Fiber Coatings: Used in the production of primary and secondary coatings due to its efficient cure through pigmented or thick layers.
• 3D Printing (Stereolithography): Acts as a key photoinitiator in resin formulations for additive manufacturing, ensuring precise and rapid layer curing.
• Electronics Encapsulation: For potting and protecting sensitive electronic components with UV-curable resins.
• Dental Composites: Facilitates the fast and hard cure of restorative materials and adhesives under dental curing lamps.
• Nail Gel and Cosmetics: A critical component in formulations for UV/LED-cured gel polishes and other cosmetic applications.

Basic Information

Product Name	2-Hydroxy-2-Methyl-1-Phenyl-Propan-1-One-2,4,6-Trimethylbenzoyldiphenyl-Phosphine Oxide Mixture
CAS No.	189146-15-4
Molecular Formula	Mixture of C17H18O2 and C28H25O2P
Molecular Weight	Mixture of components with approximate weights: 254.33 g/mol and 424.48 g/mol
Synonyms	Omnirad 2100; Darocur 4265; Photoinitiator 2100; 2-Hydroxy-2-methyl-1-phenyl-1-propanone and (2,4,6-Trimethylbenzoyl)diphenylphosphine oxide blend; HMPP/TMPO mixture; Phenylglyoxylate/Phosphine Oxide photoinitiator; UV Cure Blend 2100; Speedcure 4265
EINECS	Contact for details

Quality Control

Our 2-Hydroxy-2-Methyl-1-Phenyl-Propan-1-One-2,4,6-Trimethylbenzoyldiphenyl-Phosphine Oxide Mixture is manufactured under a strict quality management system. Each batch undergoes rigorous analytical testing, including HPLC for assay and impurity profile, to ensure consistent performance and high purity suitable for industrial applications. Certificates of Analysis (COA) detailing specific batch results are provided to guarantee traceability and compliance with your formulation requirements.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated place at room temperature (15-25°C). Keep away from heat, sparks, open flames, and incompatible materials such as strong acids and organic solvents. The container must be kept tightly closed to prevent moisture absorption and contamination.

Specification

Item	Specification
Appearance	Colorless to pale yellow liquid
Identification (IR)	Conforms
Assay (HPLC)	≥ 99.0% (Total photoinitiators)
Composition Ratio (HMPP:TMPO)	Approx. 50:50 (w/w)
Water Content (KF)	≤ 0.2%
Specific Gravity (20°C)	1.10 - 1.20
Refractive Index (20°C)	1.550 - 1.570

Note: Specifications can be tailored. Please contact us for the detailed technical data sheet of a specific grade.