As a new type of foreign trade service provider driven by both technology transformation and foreign trade services, HiSiaddi has established a "1+2+3+4=1" service system and can supply dimethylsilicone oil sourced directly from multiple well-known original manufacturers.
As a tech-driven foreign trade enterprise, HiSiaddi has repeatedly proposed dimethylsilicone oil formulation optimization schemes and application improvement suggestions through technological transformation cooperation with manufacturers and precise market demand insight. Below is a consultation case regarding dimethylsilicone oil formulation optimization delivered by HiSiaddi.
For inquiries about formulation optimization consulting services, please contact HiSiaddi customer service.
Solvemed of Germany is situated in the North Rhine-Westphalia Pharmaceutical Industrial Park, a leading mid-to-high-end local enterprise specializing in R&D and production of soft capsule preparations, probiotic health supplements and baked food excipients. All its product lines comply with four major access standards: European Pharmacopoeia EP9.0, EU Regulation EC1935 on food contact materials, REACH chemical control regulations and Germany’s LFGB food certification. All raw materials for its formulations are filed with Germany’s Federal Institute for Drugs and Medical Devices. For over a decade, three core auxiliaries – soft capsule demolding oil, fermentation antifoams and high-temperature baking release oil – were exclusively sourced from Wacker’s food and pharmaceutical grade dimethylsilicone oil.
Due to annual maintenance shutdowns at major European silicon chemical manufacturers, a 47% surge in international ocean freight rates, extended original delivery lead times of up to 115 days and continuous rising import procurement costs, the enterprise launched a China localization substitution project in 2025, locking in an annual total dimethylsilicone oil procurement volume of 212 tons divided into three major application grades: 76 tons pharmaceutical soft capsule demolding silicone oil, 72 tons food-grade silicone oil for continuous oven high-temperature release, and 64 tons antifoaming silicone oil for probiotic fermentation tanks in weakly acidic environments. The indicators of the three product types all differ from generic domestic industrial silicone oil and standard national food-grade off-the-shelf products, representing refined non-standard raw materials for food and pharmaceutical sectors.
After the client independently selected three conventional domestic silicone oil manufacturers for bulk trial procurement, using readily available domestic food-grade dimethylsilicone oil, three critical formulation and production failures emerged successively during preparation mass production, triggering partial production halts across three assembly lines. Samples sent to a German third-party GLP laboratory indicated multiple batches of finished products failed EU drug regulatory release standards, with semi-finished goods already warehoused facing scrapping risks. Domestic suppliers cited compliance with domestic chemical national standards as grounds to refuse adjustments to polymerization processes, refined post-processing procedures and raw material monomer selection, and declined targeted optimization for the client’s formulation system. Solvemed’s European R&D department attempted repeated fine-tuning of proprietary preparation formulas, changing feeding ratios and adding compound auxiliaries, yet formulation modifications require a 6-month approval cycle under German drug filing regulations; unauthorized formula changes would invalidate subsequent finished product market sampling compliance, trapping the client in a deadlock: unqualified raw materials, unmodifiable formulations and unfeasible stable production. After unsuccessful technical coordination with multiple suppliers, the client formally entrusted HiSiaddi’s domestic chemical foreign trade team to fully intervene. Leveraging its supporting foreign trade technical laboratory and domestic leading food and pharmaceutical grade silicon manufacturer resources, HiSiaddi delivered a full-chain technical solution covering raw material physical and chemical analysis, fault tracing, synthesis process optimization, terminal formulation supporting debugging and standardized mass production specifications within 58 days, completing full-category product optimization and finalization for stable localized raw material supply.
After receiving faulty raw materials, scrapped semi-finished products, production process records and EU laboratory test reports submitted by the client, HiSiaddi’s technical team immediately collaborated with a CNAS-accredited domestic testing center to conduct full physical and chemical analysis, disassembling fault causes item by item against the client’s on-site production working conditions and preparation formulation systems. All root causes were precisely localized to three core issues of generic domestic silicone oil: molecular structural defects, lack of refined post-processing and extensive impurity control. Failures of the three product grades are detailed below:
The client’s original preparation production line sprayed silicone oil onto rubber stoppers and inner mold walls. After deployment of generic domestic silicone oil, two production incidents occurred:
1. Uneven silicone oil accumulation on partial molds created oily stains on soft capsule shells, while insufficient silicone oil on partial inner capsule walls caused mold adhesion, pushing daily scrapped capsule rates from 0.3% (original Wacker product) to 8.7%, drastically raising production costs.
2. After filling polypeptide liquid medicines, insoluble particulate matter indicators exceeded standards, with three consecutive batches of finished products failing European Pharmacopoeia particulate testing and facing full-batch quarantine.
Physical and chemical testing root cause tracing: Kinematic viscosity of submitted raw materials fluctuated between 92~112mm²/s against the customized standard of 100±2mm²/s; excessive viscosity variation led to uneven coating thickness during spraying. Total residual cyclic siloxanes D4/D5 in raw materials reached 327ppm, far exceeding the client’s <50ppm limit. Small cyclic siloxane molecules migrated and precipitated over long-term contact with liquid medicine, elevating insoluble particulate levels. Total heavy metals (lead, arsenic, cadmium) measured 2.3ppm, exceeding the EP Pharmacopoeia <1ppm control limit. Generic industrial mixed DMC monomer polymerization processes cannot deeply remove trace heavy metal impurities, and domestic general production lines lack molecular distillation refining procedures – the core driver of excessive impurities. The client attempted diluting silicone oil spray concentration and adjusting spray air pressure, yet fixed soft capsule forming process constraints prevented parameter fine-tuning from fundamentally resolving mold adhesion and oily stain issues.
This grade is used for automatic continuous baking tunnel oven release with constant furnace temperatures of 210~230°C. After deploying domestic raw materials, oil yellowing occurred after 4 hours of baking, forming tan spots attached to bread and pastries, disqualifying finished products from EU food appearance access standards. When silicone oil was compounded with sunflower oil to produce finished release oil, stratification occurred after 45 days of normal-temperature storage with floating oil on the upper layer and sediment at the bottom, preventing large-scale filling and storage.
Fault root cause tracing: Generic silicone oil lacks high-pressure hydrofining post-polymerization, retaining unsaturated end groups at 0.21% within molecular chains. Unsaturated groups oxidize to form chromophores under high-temperature aerobic conditions, triggering oil yellowing. Raw materials feature excessively broad molecular weight distribution, creating polarity mismatch between small-molecule siloxanes and long-chain vegetable oils, leading to phase separation during long-term storage. Generic domestic food-grade silicone oil only undergoes simple neutralization and filtration without hydrofining to eliminate unsaturated bonds or narrow molecular weight distribution via rectification, rendering it incompatible with high-temperature baking compound systems. The client’s fixed baking formulation prohibits arbitrary vegetable oil replacement, eliminating terminal formula adjustment as a solution to stratification.
Adapted to lactic acid bacteria fermentation broth (pH 4.2~5.5 weakly acidic environment), generic pure dimethylsilicone oil exhibited defoaming onset exceeding 22 seconds, foam suppression lasting only 8 hours before foam rebound, rapid emulsion breaking and stratification of silicone oil floating on the upper layer of fermentation tanks. Partial silicone oil adsorbed onto strain surfaces reduced probiotic viable count by 18%, failing finished product probiotic content standards set by Germany’s health supplement regulations.
Fault root cause tracing: Pure dimethylsilicone oil features a fully hydrophobic structure without hydrophilic polyether side chain modification, resulting in excessively low HLB values that disrupt silicone oil dispersion systems in weakly acidic electrolyte environments and trigger rapid emulsion breaking and deactivation. Raw materials lack precise filtration, retaining 89ppm trace catalyst residues that hinder probiotic reproduction activity. Generic domestic antifoaming silicone oil is only engineered for neutral and alkaline water treatment environments without modification design for weakly acidic fermentation systems. Simply increasing silicone oil dosage raises production costs while further exacerbating strain activity impairment.
HiSiaddi’s technical team adopted a three-step strategy: first improve raw material synthesis processes, then fine-tune client terminal application formulas, and finally standardize mass production quality control specifications. It collaborated with two domestic manufacturers holding food and pharmaceutical grade silicone oil production qualifications – Xinyaqiang Refined Silicone Workshop and Xinan Silicon Industry Medical Silicone Division – deploying sealed polymerization kettles, two-stage molecular distillation, high-pressure hydrogenation equipment and polyether modification pilot facilities to implement grade-specific optimizations. Simultaneously, remote guidance was provided to German factories for fine-tuning full-process operating parameters including feeding, spraying, compounding and defoaming, with all comparative sample test data and process change records retained. All optimized samples were airfreighted to Solvemed’s German laboratory for full validation.
1. Upstream Raw Material Synthesis Improvements: Industrial mixed DMC feedstock was replaced with high-purity D3 monomers as polymerization substrates, using hexamethyldisiloxane as end-capping agent for segmented temperature-controlled polymerization (108°C low-temperature prepolymerization, 142°C high-temperature chain growth) to precisely lock molecular weight, stabilizing finished product viscosity between 99~101mm²/s. Post-synthesis, two-stage negative-pressure molecular distillation units were activated to remove D4/D5 cyclic siloxane by-products in segmented processes, limiting total cyclic siloxane residues to 41ppm. Activated carbon adsorption plus precision filtration procedures were added to eliminate trace heavy metal impurities, reducing total heavy metal content to 0.72ppm and fully meeting EP Pharmacopoeia limits.
2. Terminal Production Fine-Tuning (No Modifications to Filed Preparation Formulas): HiSiaddi issued German-language on-site operation guidelines to optimize mold silicone oil spraying processes, controlling spray temperature at 22~25°C with two-stage low-pressure atomized spraying: a thin base coating followed by supplementary fine spraying to eliminate localized silicone oil accumulation or insufficient coating. A 0.8% low-concentration silicone oil emulsion with low-speed stirring homogenization was adopted for rubber stopper siliconization to improve demolding uniformity without altering the original liquid medicine formula composition.
3. Mass Production Quality Control: This grade was produced on an independent sealed clean production line fully isolated from cross-contamination with industrial-grade silicone oil. Each batch shipped with German-recognized COA quality inspection reports, LFGB and EP compliance certificates.
1. Raw Material Process Improvements: A high-pressure catalytic hydrofining procedure was added post-polymerization under 180°C and 0.3MPa hydrogen atmosphere to eliminate unsaturated silanol end groups, lowering unsaturated groups to 0.038% and eliminating high-temperature oxidative yellowing at the molecular level. Short-path rectification narrowed molecular weight distribution to reduce molecular chain length variance and improve compatibility with edible vegetable oils; samples remained clear and yellow-free after 4 hours of constant-temperature baking at 230°C, and maintained uniform dispersion without stratification when blended with sunflower oil for 12 months of normal-temperature storage.
2. Terminal Compounding Optimization: The client was instructed to adjust vegetable oil mixing feeding sequence: low-speed stirring of vegetable oil at room temperature with slow, incremental addition of modified silicone oil at a fixed stirring speed of 320r/min to avoid localized emulsification imbalance from instantaneous mixing, without altering original vegetable oil ratios to comply with food formula filing requirements.
1. Molecular Modification Improvements: A small number of heterogeneous polyether side chains were grafted onto dimethylsilicone oil molecular side chains to fine-tune hydrophilic-lipophilic balance for stable dispersion in weakly acidic systems. Three-stage precision filtration was implemented at the end of synthesis to remove solid catalyst residues, reducing impurities to 63ppm. Actual testing recorded defoaming onset at 3.9 seconds, foam suppression lasting 27 hours without emulsion breaking across the full pH 4.2~5.5 range, eliminating silicone oil adsorption onto probiotic strains and restoring viable count to levels matching original Wacker products.
2. Fermentation Feeding Optimization: HiSiaddi technical personnel remotely guided split low-dosage silicone oil feeding at initial foam formation stages during fermentation to avoid localized high-concentration emulsion breaking from one-time bulk addition. Optimized feeding timing boosted defoaming efficiency by 40%, completely resolving foam rebound without modifying fermentation culture medium formulas.
German-English bilingual REACH-SDS documents, batch quality inspection certificates and food contact migration test reports were compiled per German regulations, while manufacturers were assisted in sorting LFGB pre-filing materials for raw materials to meet client warehouse access compliance audits.
Finalized optimized samples were airfreighted to German laboratories in separate batches, passing four verification stages: full pharmacopoeia testing, high-temperature accelerated aging storage, fermentation compatibility trials and baking pilot tests, with all performance indicators matching original Wacker silicone oil. Solvemed formally issued an initial trial order of 48 tons shipped in three batches from Shanghai Port to Hamburg Port, with complete compliance documents facilitating one-time customs clearance and warehousing. After raw material deployment on mass production lines, soft capsule scrapping rates fell back to 0.28%, liquid medicine insoluble particulates passed release inspections, oily yellow spots were fully eliminated on baked goods for stable filling of compounded release oil, and foam in fermentation tanks remained controllable, restoring finished probiotic product pass rates to original standards with full resumption of three production lines to maximum capacity.
The remaining 164 tons of ordered goods were shipped in six monthly batches aligned with seasonal supply and demand cycles of Germany’s food and pharmaceutical industries, achieving 100% on-time delivery of the full 212-ton annual procurement order. The comprehensive procurement unit price of localized modified silicone oil decreased by 37.9% compared to original Wacker products, ocean shipping lead times were compressed from 115 days to 38 days, and Solvemed’s comprehensive preparation raw material production costs dropped by 22.7%. In the following year, the client renewed its annual long-term contract for 265 tons of dimethylsilicone oil series, fully entrusting HiSiaddi with model selection and technical services for supporting food and pharmaceutical silicon raw materials including polyether modified antifoams, silicone waxes and emulsified silicone oil. This fault optimization project established long-term stable strategic cooperation and became a benchmark case for HiSiaddi expanding organosilicon foreign trade business targeting European food and pharmaceutical sectors.
From the perspective of industry pain points: China possesses massive dimethylsilicone oil production capacity, yet most small and medium manufacturers focus on low-end markets including rubber, coatings and entry-level daily chemicals, adopting low-cost extensive hydrolysis polymerization processes without refined post-processing equipment such as molecular distillation, hydrofining and polyether modification. Their products are only suitable for low-end downstream sectors with flexible formulation adjustment and loose regulatory thresholds. In contrast, European and American mid-to-high-end food and pharmaceutical enterprises are subject to multiple binding regulations including European Pharmacopoeia, food laws and raw material filing requirements, with fixed terminal preparation formulas locked by drug regulatory authorities and prohibited from arbitrary modification. This creates rigid customized requirements for raw material molecular structure, trace impurity control and working condition adaptability, which generic off-the-shelf silicone oil inherently cannot satisfy – raw material physical and chemical defects directly propagate to mass production lines and trigger batch failures, the core root cause of the client’s production setbacks during trial sourcing.
From the perspective of HiSiaddi’s foreign trade service value: Distinct from traditional middlemen solely engaged in product sales, HiSiaddi integrates front-end foreign trade and back-end chemical technical laboratory composite service capabilities, connecting the full chain: European terminal production working conditions and formulation demands → domestic raw material synthesis process improvements → terminal usage process supporting fine-tuning → standardized mass production quality control. It resolves two-way information barriers: overseas clients lack familiarity with premium domestic refined silicon manufacturers and domestic chemical process parameters, while domestic manufacturers lack expertise in EU food and pharmaceutical market access regulations and overseas terminal preparation formulation systems. Breaking free from the traditional foreign trade limitation of "only selling products without technical services", HiSiaddi achieves deep binding with mid-to-high-end European and American end users through value-added technical services including fault diagnosis, formulation optimization and process implementation.
From the procurement logic of overseas mid-to-high-end clients: European and American pharmaceutical and food leading enterprises prioritize raw material compliance, working condition adaptability and full-chain technical support above procurement unit prices during localized sourcing trials. After raw material production failures, clients avoid blind trial sourcing of low-cost raw materials and prioritize suppliers capable of full-process technical resolution including fault tracing, formulation optimization and process improvement – the decisive factor for Solvemed selecting HiSiaddi for long-term cooperation after multiple supplier failures, making this optimization implementation case a benchmark project for HiSiaddi expanding European food and pharmaceutical organosilicon foreign trade business.
For inquiries about formulation optimization consulting services, please contact HiSiaddi customer service.
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