HiSiaddi is an innovative foreign trade service provider driven by both technology transformation and export business. We have established a service system formulated as "1+2+3+4=1" and can supply photoinitiator 819 sourced directly from multiple well-known original manufacturers. As a technology-driven foreign trade enterprise, HiSiaddi has repeatedly collaborated with factories on technology conversion and accurately captured market demands to resolve customized product requirements for photoinitiator 819. Below is our case study addressing customized demands for photoinitiator 819.
Please contact HiSiaddi customer service if you require more customized services.
Purchaser: OPTIFILM NV, Belgium A listed European enterprise specializing in optical functional films, its core products include LCD backlight brightness enhancement films, high-end optical PET hardcoat films, and UV coatings for automotive display cover plates. The company supplies European LG Display and Bosch automotive screen factories, and its products comply with strict standards including EU REACH, RoHS 2.0, IEC environmental specifications for optical materials, and stringent low-extraction control.
The client previously purchased Omnirad 819 (original IGM dual acylphosphine oxide photoinitiator) with a stable annual procurement volume of 102 tons. Due to maintenance shutdowns at European chemical plants, sharp raw material price hikes, and extended import lead times of up to 70 days, the client launched localized domestic substitution from China.
The client independently contacted three leading domestic photoinitiator manufacturers (Shinwell New Materials, Jiuri New Materials, Yangfan New Materials). All mass production lines of these manufacturers adopt general industrial-grade formulas with conventional synthesis and standard rectification processes, targeting PCB inks and ordinary plastic coatings. Customization to optical-grade ultra-low impurity specifications requires revamping catalytic synthesis systems, building multi-stage negative pressure precision rectification equipment, and installing closed light-shielded crystallization workshops. High renovation costs and dedicated batch production line occupancy made manufacturers prioritize ready-made standard grades and refuse to open exclusive customized production lines. After four consecutive rounds of sample testing, the client encountered excessive heavy metals, high phosphorus-based by-product content, and white haze formed by high-temperature precipitation on coated films, halting the pilot production of optical film formulations. The client fully entrusted HiSiaddi with full-process delivery covering index decomposition, factory screening, process customization, lab-pilot-mass production validation, and export compliance.
Conventional indicators of domestic general industrial-grade 819: Main content ≥98.5%, inorganic heavy metals ≤50ppm, by-product triphenylphosphine oxide ≤300ppm. Stringent customized parameters for the client’s optical grade:
1. Effective active ingredient ≥99.70%, key organic by-product triphenylphosphine oxide ≤8ppm, total miscellaneous organic impurities ≤15ppm;
2. Individual heavy metal content (Pb, As, Cd, Hg) <10ppb, complying with EU RoHS control standards for optical materials;
3. Color APHA ≤20, high transparency with no visible macroscopic impurities, excellent thermal weight loss performance, no small molecule precipitation at 120°C, and no white haze formed during high-temperature curing of optical films;
4. Low iron ion and low chloride ion content to prevent long-term yellowing of UV coatings and attenuation of optical transmittance;
5. Packaging: 25kg light-proof iron drums lined with aluminum foil, filled and sealed with nitrogen inside drums to isolate air oxidation;
6. Batch-attached documents: Full HPLC spectra, English COA issued by third-party SGS laboratory, RoHS test reports, and EU compliance documents.
Domestic mass production of 819 adopts batch reactor general processes with economical industrial catalysts. Optical-grade purification requires ultra-high-purity starting raw materials and additional three-stage negative pressure rectification + low-temperature closed crystallization equipment, which incurs high capital investment. Customized orders account for a small proportion of manufacturers’ total capacity, so factories have no willingness to carry out technical upgrades.
Triphenylphosphine oxide is an inevitable byproduct during 819 synthesis. The boiling point difference between the two substances is minimal, and ordinary rectification only achieves rough separation, unable to realize ppm-level deep purification. Excessive byproducts directly lead to white haze precipitation on optical films under high-temperature conditions.
Some manufacturers can temporarily purify lab samples to meet specifications, but inconsistent raw material purity, temperature control, and crystallization rates during mass production cause unstable impurity and color values across batches, failing to support continuous stable production of optical films.
Domestic manufacturers only provide national standard quality inspection certificates, without supporting English files for RoHS and REACH for optical-grade products, which prevents the client’s IQC warehouse acceptance audit in Belgium.
Leveraging domestic photoinitiator industrial chain resources, HiSiaddi selected high-tech chemical enterprises equipped with high-purity phosphide synthesis, multi-stage negative pressure rectification, and dust-free light-shielded crystallization workshops. We collaborated with factory R&D departments to carry out targeted process upgrades:
1. Replace ultra-high-purity phosphorus-based starting materials and special organic catalysts to reduce the generation of triphenylphosphine oxide byproducts at the source of synthesis;
2. Build an independent dedicated production line with three-stage stepped vacuum rectification and low-temperature closed crystallization. Precisely cut light and heavy fractions in segments, and use special adsorption fillers to deeply remove trace phosphorus-based byproducts;
3. Add an ion exchange purification section to thoroughly eliminate iron, chloride, and heavy metal ions. Finished products are stored in fully nitrogen-sealed facilities to avoid oxidative discoloration.
1. 5kg lab trial samples: Finalize full sets of process parameters, conduct full-item testing in a CNAS-accredited third-party laboratory in accordance with the client’s optical indicators. Qualified samples are airfreighted to the client’s R&D center in Belgium for optical hardcoat film formulation debugging. Rectification and crystallization parameters are fine-tuned based on transmittance and high-temperature precipitation data;
2. 300kg continuous pilot production: Run three parallel batches consecutively, store retained samples under high-low temperature accelerated conditions for 60-day stability testing, finalize standardized mass production SOPs, and lock fixed parameters including raw material ratio, reaction temperature control, and rectification vacuum degree;
3. HiSiaddi deploys chemical process specialists on-site at the factory for inspections, sampling tests at every procedure from raw material feeding, synthetic reaction, rectification crystallization to closed filling.
1. Custom light-proof iron drums lined with aluminum foil: Dry drums to remove oxygen before filling and conduct nitrogen replacement sealing to eliminate moisture oxidation and impurity introduction during transportation and storage;
2. HiSiaddi collaborates with factories to compile complete technical archives: Full-component HPLC test spectra, batch stability reports, full SGS-RoHS screening reports. Prepare bilingual English/French SDS, English optical-grade COA, and raw material conformity declarations in compliance with REACH and CLP regulations.
Negotiate dedicated production lines for optical-grade 819 separately reserved by the factory, arrange staggered production schedules away from general industrial-grade 819 to avoid cross-contamination. Schedule batches in accordance with the client’s monthly consumption plan, complete dangerous goods classification, commodity inspection and customs clearance, and deliver goods by sea to the Port of Antwerp, Belgium on schedule.
1. The first trial order of 22 tons cleared customs and entered the warehouse smoothly. When the client formulated optical hardcoat coatings on production lines, transmittance, high-temperature precipitation resistance, and yellowing resistance all matched imported original IGM products. The new optical film successfully passed incoming material audits for Bosch automotive screens and was officially launched into mass production;
2. The comprehensive procurement cost of customized domestic raw materials decreased by 28.6% compared with imported original products, and delivery lead time was shortened from 70 days to less than 25 days. A 102-ton annual procurement framework agreement was formally signed, with balanced shipments divided into 10 batches;
3. In the following year, all customized upgraded low-impurity 819 grades for the client’s new ultra-thin optical film project were exclusively entrusted to HiSiaddi for targeted development and customization.
1. Mainstream domestic 819 production capacity focuses on general industrial grades for inks and ordinary plastics. High-end customization for optical displays involves high equipment renovation costs and small order volumes, making it difficult for original manufacturers to independently deliver non-standard customized products to overseas high-end optical clients;
2. Core Value of HiSiaddi: Connect stringent optical end-user indicators, factory technical renovations, multi-stage sample verification, special third-party testing, and full EU compliance along the industrial chain, bridging multiple gaps in process, technology, and regulations between upstream factories and overseas high-end optical material clients;
3. Core Demands of European High-End Optical Material Procurement: Ultra-low byproduct content, low precipitation, extreme batch stability, and complete traceable EU environmental compliance documents take priority over unit price. Customized technical support is the key to realizing domestic substitution and long-term binding of high-end clients.
Please contact HiSiaddi customer service if you require more customized service solutions.
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