Photoinitiators
Your Professional Photoinitiators Supplier！
In order to integrate our group production & sourcing channels, facilitate in-depth cooperation with our partners, and provide better services to abroad clients, we, Orke chemcial Co.,LTD established in 2025. With supporting of our four production bases, Orkechem business cover from functional petroleum resin, solvents, plasticizers, to specialty products used in asphalt & rubber filed.
Why Choose Us
Rich Experience
After more than 20 years of development, we have grows to be one of the reliable and reputable companies in chemical filed, and our products have gained a considerable market share.
Our Certifications
Zhengde has obtained the ISO9001:2015 standard certification.
Sales Market
Orke Chemical was set up to develop abroad market, provide our client with an unmatched portfolio of delivery and supply chain solutions.
A photoinitiator is a chemical compound that absorbs light energy and uses it to generate reactive species, such as free radicals or cations, which then initiate a chemical reaction, most commonly photopolymerization. This light-induced reaction transforms liquid materials, like resins, into hardened or cured solids, a process vital for industries including printing, dental care, and 3D printing. Photoinitiators are crucial in UV-curable systems for applications like coatings, inks, adhesives, and dental restoratives.
Product Specification
We offers the Photoinitiator TPO specifications:
|
TESTS |
SPECIFICATIONS |
|
Appearance |
Pale yellow powder or crystal |
|
Content(%) |
99min |
|
Acid Value(mg KOH) |
0.50max |
|
Volatile(%) |
0.20max |
|
Melting point( ) |
91-94 |
Product features
Good storage stability
TPO demonstrates exceptional chemical stability under normal temperature and light-free conditions, showing resistance to thermal auto-polymerization or pre-reaction with resins and monomers. This property grants UV formulations a longer shelf life and wider processing window, ensuring more stable and reliable compounding and sizing processes while reducing production risks.
Lower additive requirements and high cost effectiveness
Due to its extremely high light initiation efficiency, TPO in the formulation usually only needs a low amount of addition to achieve the desired curing effect. The potential effects caused by the residual initiator are reduced.
Flexible and high performance end products are suitable
It can be adjusted through the formula to form a flexible and bend-resistant cured film, which makes it equally suitable for emerging applications such as flexible printed electronics and wearable device coatings that require both high functionality and durability.
Classified of Photoinitiators
Photoinitiators come in two main types: Type I and Type II. Type I photoinitiators split into free radicals immediately when activated by light. Diphenyl(2,4,6-trimethylbenzoyl)phosphine oxide, often called TPO, is an example. It works quickly and is efficient especially in ultraviolet light exposure.
Type II photoinitiators work differently. They form radicals by abstracting hydrogen from a co-initiator such as an amine. Isopropyl thioxanthone (ITX) and diethyl thioxanthone (DETX) belong to this group. They are slower but fit well with many traditional ultraviolet and modern light-emitting diode curing systems.
The absorption behavior of photoinitiators is key in selecting one for a given purpose. TPO has strong absorption in the near-ultraviolet wavelength range. This makes it a good fit for systems that use short-wave ultraviolet light.
ITX and DETX absorb more in the longer ultraviolet and visible light regions. Their absorption ranges make them compatible with many light-emitting diode sources. They work well when a deep cure is needed. Sometimes, they are better for surface curing where light penetration is less of an issue.
Application of Photoinitiators
Coatings and Inks
These systems are commonly applied in printing, packaging, home décor laminates, and industrial coatings. For example, sign printing and packaging lines rely on photoinitiators to cure inks within seconds, enabling continuous high-speed production. Decorative laminates for furniture or building panels also use light-cured coatings to achieve a durable, quick-drying finish.
01
Adhesives
In electronics assembly and automotive manufacturing, photoinitiator-based adhesives are used for bonding components such as sensors, circuit boards, and structural parts. These adhesives are exposed to UV or LED light, curing within seconds and forming strong, reliable bonds.
02
Electronics Industry
In chip manufacturing, photoinitiators are a key component of photoresist materials applied to silicon wafers. Accurate pattern transfer is crucial in photolithography, and high-purity photoinitiators ensure that the patterns used to create circuits are precise and free of defects.
03
Three-Dimensional Printing and Stereolithography (SLA)
Photoinitiators drive the curing process in light-based 3D printing methods.In stereolithography (SLA) and digital light processing (DLP) printing, photoinitiators enable the rapid solidification of liquid resins into detailed 3D structures. Applications include dental models, hearing aids, jewelry prototypes, and custom engineering parts.
04
Medical Field
Photoinitiators are used in medical-grade curing and pharmaceutical processes.Dental materials such as fillings, sealants, and cements are cured using light-activated formulations. In drug delivery, photoinitiators help synthesize polymers that release medication in controlled doses.
05
Package & Storage
Package: 20kg box or 25kg drum, or requirement of clients
Storage: Keep the container sealed.Stored in a dark, cool and dry place.
FAQ
Qingdao Orke Chemical Co., Ltd. is well-known as one of the leading photoinitiators manufacturers and suppliers in China. If you're going to buy customized photoinitiators made in China, welcome to get quotation and free sample from our factory. For price consultation, contact us.
4-Isopropylthioxanthone, Bis 4 tert butylphenyl iodonium Hexafluorophosphate, Photoinitiator TPO