Description

1,1'-(Methylene-Di-4,1-Phenylene)Bis[2-Hydroxy-2-Methyl-1-Propanone] is a high-performance, difunctional photoinitiator belonging to the α-hydroxy ketone class. This compound is critical for initiating rapid and efficient polymerization in UV-curable systems, ensuring high crosslink density and superior surface cure. It is essential for manufacturers in the coatings, inks, adhesives, and electronics industries who require reliable, high-speed curing for demanding applications.

Application

• UV-Curable Coatings: A key photoinitiator for clear coats, wood finishes, and industrial metal coatings, providing excellent surface hardness and gloss.
• Graphic Arts & Printing Inks: Enables fast curing in offset, screen, and flexographic inks, delivering high print quality and scratch resistance.
• Electronics & Optoelectronics: Used in the production of photoresists, optical fiber coatings, and solder masks due to its efficient curing and low yellowing properties.
• Adhesives & Sealants: Facilitates instant bonding in pressure-sensitive adhesives (PSAs) and assembly adhesives for automotive and consumer goods.
• 3D Printing (Stereolithography): Serves as a photoinitiator in resin formulations for rapid prototyping and additive manufacturing.
• Dental Composites: Employed in light-cured dental restorative materials for quick setting and high mechanical strength.

Basic Information

Product Name	1,1'-(Methylene-Di-4,1-Phenylene)Bis[2-Hydroxy-2-Methyl-1-Propanone]
CAS No.	474510-57-1
Molecular Formula	C25H32O4
Molecular Weight	396.52 g/mol
Synonyms	2-Hydroxy-2-methyl-1-[4-(1-methylvinyl)phenyl]propan-1-one dimer; BAPO (Bis(acyl)phosphine oxide) related photoinitiator; 2-Hydroxy-2-methyl-1-[4-(1-methylvinyl)phenyl]-1-propanone homopolymer; α-Hydroxy Ketone Photoinitiator; Difunctional Photoinitiator 184; UV Photoinitiator 184D; 1,1'-(Methylenedi-4,1-phenylene)bis[2-hydroxy-2-methylpropan-1-one]
EINECS	Contact for details

Quality Control

Our 1,1'-(Methylene-Di-4,1-Phenylene)Bis[2-Hydroxy-2-Methyl-1-Propanone] is manufactured under a strict quality management system. Every batch undergoes rigorous analytical testing, including HPLC for purity and identity confirmation, to ensure consistent performance and compliance with industry standards. Certificates of Analysis (COA) detailing all specifications are available upon request.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at room temperature (15-25°C). This material is light-sensitive and easily oxidized; for long-term storage, consider maintaining under an inert atmosphere such as nitrogen to preserve efficacy.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms to reference spectrum
Assay (HPLC)	≥ 98.0%
Melting Point	95 - 105 °C
Loss on Drying	≤ 0.5%
Residue on Ignition	≤ 0.1%

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