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ECure® Photoinitiators

High efficiency UV and visible light sensitive photoinitiators used to initiate free-radical polymerisation in UV/EB cured coatings, inks and adhesives.
CAS NUMBER: 270586-78-2 | 162881-26-7
Names ECure TMO | 2,4,6-Trimethylbenzoyldiphenylphosphine Oxide ECure 819 | Bisacylphosphine Oxide Photoinitiator
Chemical formula C₂₁H₁₉O₂P (ECure TMO) | C₂₈H₂₁O₃P (ECure 819)

Product Overview

ECure® photoinitiators are a specialised range of free-radical initiating chemistries formulated to absorb ultraviolet (UV) and visible light and trigger polymerisation in radiation cure systems. These photoinitiators are used in UV/EB cured coatings, inks, adhesives, primers and other surface treatment applications where rapid cure, minimal heat input and strong performance are required.

ECure TMO is a high efficiency UV photoinitiator serving as an alternative to traditional TPO (diphenyl(2,4,6-trimethylbenzoyl)phosphine oxide), offering effective initiation under medium UV wavelengths with balanced reactivity and low migration. ECure 819 is a highly efficient bisacylphosphine oxide photoinitiator that absorbs both UV and visible light, enabling deep cure and reduced yellowing in high performance coating and adhesive systems.

Both grades support fast surface cure, improved film properties and reduced processing time in formulated UV/EB applications.

Technical Profile of ECure® Photoinitiators

Free radical photoinitiators engineered for robust UV and visible light induced polymerisation in coatings, adhesives and polymer systems.
Molar Weight
350.34 - 397.43 g/mol
Melting Point
~68 - 90 °C
Boiling Point
Not applicable
Flash Point
Non combustible
Form
Powder / solid

Key Industries of ECure® Photoinitiators

Industries served by this product.

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Coatings

RBH supplies specialist raw materials for decorative, industrial, powder, and ink coating systems, supporting consistent formulation and dependable performance. Our portfolio includes functional minerals, additives, and base materials designed to meet the technical demands of modern coating manufacture across a wide range of applications.
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Adhesives, Sealants & Construction

RBH supplies specialist raw materials for adhesives, sealants, and construction applications, supporting structural, functional, and laminating systems. Our market-driven approach combines high performance materials with technical expertise to address complex formulation challenges and evolving industry requirements.
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Plastics & Thermoplastics

RBH supplies specialist additives and mineral fillers for thermoplastic applications, supporting performance, protection, and process efficiency across a wide range of plastic formulations.
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Composites

RBH supplies specialist raw materials for composite applications, supporting high-performance, lightweight solutions across a wide range of industries. Our market-led approach combines trusted global supply with technical expertise to meet the evolving demands of modern composite manufacture.
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Packaging & Availability

Available in multiple packaging formats to suit your processing needs, supplied under ISO 9001 quality management systems. Contact RBH for regional stock or customised packing options.

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High efficiency UV and visible light sensitive photoinitiators used to initiate free-radical polymerisation in UV/EB cured coatings, inks and adhesives.

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