Photoinitiator MBP

High Efficiency Benzophenone-Based Type II Photoinitiator for UV Curing Systems

Photoinitiator MBP is an efficient free radical photoinitiator, used in conjunction with tertiary amine co-initiators to achieve curing and polymerization of the corresponding resins. It is suitable for use in varnishes, inks, coatings, and adhesives.

Compared with standard benzophenone photoinitiators, MBP offers improved curing efficiency, reduced yellowing tendency, and better compatibility with modern low-migration formulations.

Key Features & Benefits

• High reactivity with amine co-initiators
• Strong UV absorption (250–365 nm) for efficient initiation
• Excellent surface cure and improved through-cure performance
• Low yellowing compared to traditional benzophenone systems
• Cost-effective solution for large-scale industrial UV curing
• Good compatibility with oligomers and monomers

UV Absorption & Photoinitiation Mechanism

MBP functions as a Type II photoinitiator. Upon UV exposure, it absorbs energy and reaches an excited triplet state. It then abstracts hydrogen from an amine co-initiator, generating free radicals that initiate polymerization.

This mechanism ensures:

• Enhanced curing speed in pigmented systems
• Improved depth of cure in thick films
• Better performance in oxygen-rich environments

Competitive Advantages

• Better cost-performance vs. high-end photoinitiators
• Lower yellowing vs. traditional benzophenone
• Improved curing in pigmented formulations
• Flexible use in hybrid photoinitiator systems

Applications of Photoinitiator MBP:

Used in Varnish, plastic coatings, wood coatings, adhesives, offset printing inks, screen printing inks, flexographic printing inks, electronic products

Recommended Dosage

Typical dosage: 1-5% depending on formulation requirements and photoinitiator system.

Technical Specifications

• CAS No.:134-84-9
• Chemical Name:4-methylbenzophenone
• Molecular Formula:C14H12O
• Molecular Weight:196.3
• Appearance: White crystalline flaky

Formulation Guidance

For optimal performance, MBP is typically used in combination with:

• Tertiary amines (e.g., EDB, DMAEMA)
• Synergists to enhance surface cure
• Other photoinitiators for broad-spectrum absorption

Package:

25KG cartons

Storage and Transportation:

• Keep container tightly closed and dry and storage in cool place.
• Attention should be paid to avoiding light during production, manufacturing, storage and transportation.