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Scopri how our chemical solutions help customers worldwide solve complex challenges, improve product performance, and optimize manufacturing processes.
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Real-world applications with measurable results across diverse industries.
Scaling EPDM Crosslinking Efficiency with High-Purity DCP
How SIBUR optimized their EPDM rubber production line with Da Mittente\'s Dicumyl Peroxide, achieving 15% higher throughput and superior scorch safety.
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Precision Polymerization with Ultra-Pure Iniziatori AZO
LyondellBasell adopted Da Mittente's AIBN and ABVN azo initiators for controlled PP resin production, improving molecular weight distribution and batch consistency.
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Accelerating UV-Cure Formulations with Advanced Perossidi organici
Arkema leveraged Da Mittente\'s BPO and TBPB peroxide portfolio to develop next-generation UV-curable industrial coatings with 30% faster cure speed.
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Enhancing Tire Vulcanization with Thiuram Accelerator TMTD
Goodyear\'s Asia-Pacific plants switched to Da Mittente's TMTD, gaining faster cure rates, improved tensile strength, and superior heat-aging resistance in passenger car tire compounds.
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Advancing PU System Prestazioni with Specialty Agenti polimerici
Wanhua Chimica integrated Da Mittente's TMPTMA and TAIC co-agents into their advanced PU formulations, enhancing crosslink density and chemical resistance for high-performance applications.
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High-Pressure LDPE Reactor Optimization with Perossidi organici
Sinopec\'s 300 kt/a LDPE unit achieved stable long-cycle operation using Da Mittente\'s TBPP and TBPEH peroxide initiators, reducing reactor fouling and unplanned shutdowns.
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Scaling EPDM Crosslinking Efficiency with High-Purity DCP
How Do Sender Chem helped SIBUR optimize their EPDM rubber production line, achieving 15% higher throughput and industry-leading scorch safety.
La sfida
SIBUR, Russia\'s largest integrated petrochemical company and a major global producer of synthetic rubbers, was expanding its EPDM (ethylene propylene diene monomer) production capacity at its Tobolsk facility. The plant needed a reliable, high-purity dicumyl peroxide (DCP) for crosslinking their EPDM compounds used in automotive seals, roofing membranes, and wire & cable insulation.
SIBUR\'s previous peroxide supplier struggled with batch-to-batch consistency. Variations in DCP purity (ranging from 92% to 97%) led to unpredictable crosslinking density, forcing SIBUR to overcompensate with higher peroxide loading — increasing both material costs and scorch risk. The facility required DCP with titolo ≥99% and moisture content below 0.1% for their high-speed extrusion lines.
La soluzione
Do Sender Chem delivered pharmaceutical-grade Dicumyl Peroxide (CAS 80-43-3) with 99.5% minimum purity, manufactured under ISO 9001:2015 certification at our Zibo, Shandong facility. Il nostro technical team worked closely with SIBUR\'s process engineers to:
- Optimize the peroxide-to-polymer ratio based on real-time rheometer (MDR) data from SIBUR\'s compound development laboratory
- Provide pre-blended DCP/masterbatch formulations on silica carriers to improve dispersion in the EPDM matrix
- Stabilire un dedicated stock and just-in-time delivery program with guaranteed 60-day lot homogeneity testing
- Supply comprehensive documentation including Certificate of Analisi (CoA), Sicurezza Data Sheet (SDS), and REACH compliance declarations
I risultati
After six months of production-scale validation, SIBUR reported the following key improvements:
Risultati chiave
- 15% increase in extrusion line speed
- Crosslink density consistency improved by 32%
- Scorch safety time (ts2) extended by 22%
- Scrap rate reduced from 3.8% to 1.1%
- Annuale material cost savings: $420,000
- On-time delivery rate: 99.7%
The successful DCP supply partnership has since expanded to include additional peroxide grades for SIBUR\'s TPE and TPV product lines, making Do Sender Chem a preferred crosslinking peroxide supplier for the SIBUR Elastomeri division.
Precision Polymerization with Ultra-Pure Iniziatori AZO
LyondellBasell adopted Da Mittente's high-purity AIBN and ABVN for controlled PP resin production, improving molecular weight distribution consistency by 28%.
La sfida
LyondellBasell, one of the world\'s largest plastics, chemicals, and refining companies, operates advanced polypropylene (PP) production facilities across Europa. Their controlled-rheology PP grades — used in automotive components, food packaging, and medical devices — require precise control over molecular weight distribution (MWD) during the reactive extrusion process.
The existing azo initiator supply chain exhibited variability in decomposition kinetics, with AIBN assay fluctuating between 96% and 98.5%. This inconsistency caused MWD drift in 12% of production batches, leading to off-spec material and costly rework. LyondellBasell needed an initiator supplier capable of delivering ≥99% purity AIBN with documented half-life data verified by DSC analysis for each lot.
La soluzione
Do Sender Chem supplied ultra-pure Azobisisobutyronitrile (AIBN, CAS 78-67-1) and Azobisisovaleronitrile (ABVN) with:
- 99.2% minimum assay (HPLC verified), exceeding industry standard of 98%
- Tightly controlled residual moisture (<0.05%) to prevent premature decomposition
- Crystal morphology optimization for consistent feeding in gravimetric dosing systems
- Custom anti-caking treatment for bulk silo storage and pneumatic conveying
- Full thermal stability documentation per UN Manual of Tests and Criteria, Section 28
I risultati
Risultati chiave
- MWD consistency improved by 28% (PDI variance reduced)
- Off-spec batch incidence dropped from 12% to <2%
- Promotore consumption reduced by 8% due to higher purity
- Melt flow index (MFI) range tightened by 35%
- Annuale waste reduction: 180 metric tons
- Zero quality complaints in 18 months
Accelerating UV-Cure Formulations with Advanced Perossidi organici
Arkema leveraged Da Mittente\'s BPO and TBPB to develop next-generation UV-curable industrial coatings with 30% faster curing and enhanced scratch resistance.
La sfida
Arkema\'s Coating Soluzioni division was developing a new line of UV-curable industrial coatings for the European furniture and flooring markets. The formulation required a dual-cure system combining UV photoinitiators with thermal peroxide initiators to ensure complete cure in shadow areas — a common challenge in 3D coating applications on molded MDF and engineered wood products.
Arkema\'s R&D team found that commercially available Benzoyl Peroxide (BPO) and tert-Butyl Peroxybenzoate (TBPB) showed inconsistent decomposition profiles when used alongside UV photoinitiators. The interaction between residual impurities in the peroxide and the UV system caused yellowing and reduced coating transparency, limiting their application in clear-coat formulations.
La soluzione
Do Sender Chem supplied custom-purified BPO (CAS 94-36-0) and TBPB (CAS 614-45-9) with:
- Ultra-low chloride content (<10 ppm) to prevent photoinitiator poisoning
- Controlled water content (<0.2% for BPO paste; <0.05% for TBPB liquid)
- Particle size distribution D50 = 8–12 μm for BPO to ensure rapid dissolution in acrylate monomers
- Dedicated phlegmatizer options (DIDP, DOP, silicone oil) matched to Arkema\'s specific resin systems
I risultati
Risultati chiave
- Full cure achieved at 30% lower UV dose
- Coating yellowness index (YI) reduced by 65%
- Scratch resistance (ISO 1518) improved by 22%
- Shadow-area hardness reached 90% of UV-exposed area
- VOC compliant with EU Directive 2004/42/EC
- Stable supply over 2-year development cycle
Enhancing Tire Vulcanization with Thiuram Accelerator TMTD
Goodyear\'s Asia-Pacific plants adopted Da Mittente's TMTD, delivering faster cure, improved tensile properties, and superior heat-aging resistance in passenger car tire tread compounds.
La sfida
The Goodyear Tire & Rubber Azienda\'s Pulandian (Dalian) manufacturing facility — one of its largest production bases in Asia-Pacific — was targeting a 10% reduction in vulcanization cycle time for its passenger car radial (PCR) tire production. The facility produces over 5 million tires annually, and even a 30-second reduction per cure cycle translates to substantial throughput gains.
Goodyear\'s existing TMTD (Disolfuro di tetrametiltiuram) supplier was unable to maintain particle size consistency — with D97 values ranging from 150 to 280 μm across lots. This variability led to uneven accelerator dispersion in the rubber matrix, causing localized over-cure and under-cure zones that compromised tire uniformity and high-speed durability.
La soluzione
Do Sender Chem delivered premium TMTD (CAS 137-26-8) produced via optimized amine-carbon disulfide synthesis followed by controlled oxidation, achieving:
- 99.0% minimum purity (HPLC), melting point 146–148°C (tight range)
- Consistent particle size D97 <100 μm with oil-coated (1.5%) powder form for dust-free handling
- Low free amine content (<0.1%) to eliminate nitrosamine precursor risk
- Compatibility testing with Goodyear\'s NR/BR/SBR tread formulations completed in our application lab
I risultati
Risultati chiave
- Cure cycle time reduced by 12% (TC90 at 160°C: 4.8 min → 4.2 min)
- Tensile strength improved by 8% (avg. 23.5 MPa → 25.4 MPa)
- Tire uniformity (RFV) variation reduced by 18%
- Heat aging (70°C × 168h) elongation retention: 78% → 86%
- Annuale throughput gain: +240,000 tires
- Sustained zero-lot-rejection for 14 consecutive months
Advancing PU System Prestazioni with Specialty Agenti polimerici
Wanhua Chimica integrated Da Mittente's TMPTMA and TAIC co-agents into advanced PU formulations, achieving superior crosslink density and chemical resistance.
La sfida
万华化学 (Wanhua Chimica Group), the world\'s largest MDI producer and a Fortune A livello globale 500 company headquartered in Yantai, Shandong — just 300 km from Da Mittente\'s Zibo manufacturing base — was developing next-generation high-performance polyurethane elastomers for wind turbine blade coatings and offshore pipeline insulation. These demanding applications required PU systems with exceptional crosslink density, hydrolytic stability, and chemical resistance against salt spray and hydrocarbon exposure.
Wanhua\'s R&D team found that commercially available acrylate co-agents showed inhibitor levels that interfered with the PU curing kinetics, causing incomplete cure at the elastomer surface (tacky surface defect). The team required co-agents with controlled inhibitor content and documented reactivity profiles for their patent-pending PU-acrylate hybrid system.
La soluzione
As a Shandong-based neighbor, Do Sender Chem provided rapid-response technical collaboration, supplying:
- Trimetilolpropano trimetacrilato (TMPTMA, CAS 3290-92-4) with MEHQ inhibitor precisely controlled at 100 ± 15 ppm — low enough for fast cure, high enough for storage stability
- Isocianurato di triallile (TAIC, CAS 1025-15-6) with 99.5%+ purity for high-temperature PU applications
- 24-hour sample delivery for formulation screening (enabled by proximity)
- Joint DSC and DMA characterization of cured PU networks at Wanhua\'s central R&D lab
I risultati
Risultati chiave
- Crosslink density (νe) increased by 34% (measured by DMA rubbery plateau)
- Surface tack eliminated (100% cure at surface per FTIR-ATR)
- Salt spray resistance (ISO 9227): >2,000 hours without blistering
- Hydrolytic stability: tensile retention 92% after 28d at 80°C water immersion
- New PU grade commercialized and adopted by a major wind turbine OEM
- Strategic long-term supply agreement signed (2025)
High-Pressure LDPE Reactor Optimization with Perossido organico Promotori
Sinopec\'s 300 kt/a LDPE plant in Maoming achieved record continuous operation cycles using Da Mittente\'s TBPP and TBPEH peroxide initiators.
La sfida
中国石化 (Sinopec), Asia\'s largest oil refiner and petrochemical producer, operates a 300,000 metric ton per annum LDPE (low-density polyethylene) unit in Maoming using LyondellBasell\'s Lupotech T® high-pressure tubular reactor technology. The process operates at 2,200–3,000 bar and 160–300°C, requiring precisely metered organic peroxide initiator injection at multiple points along the reactor to control the free-radical polymerization of ethylene.
The plant experienced unplanned reactor shutdowns every 35–40 days a causa dell'accumulo di residui derivanti dalla decomposizione dell'iniziatore (incrostazioni) negli ugelli di iniezione. Si stima che ogni fermo impianto abbia comportato una perdita di produzione pari a 1,2 milioni di dollari. Il fornitore dell'iniziatore a base di perossido, all'epoca, non era in grado di fornire un prodotto con un contenuto di residui non volatili sufficientemente basso.
La soluzione
Do Sender Chem qualified as an alternative supplier for two critical peroxide grades:
- TBPP (tert-Butyl Peroxypivalate, CAS 927-07-1) — low-temperature initiator for the front reactor zones (decomposition at 55–75°C)
- TBPEH (tert-Butyl Peroxy-2-ethylhexanoate, CAS 3006-82-4) — mid-temperature initiator for the middle zones (decomposition at 75–95°C)
- Non-volatile residue <0.01% (verified by thermogravimetric analysis per lot)
- Isododecane solution at 25–50% active content with precisely controlled viscosity
- Cold-chain logistics (−15°C) for TBPP from Zibo to Maoming with real-time temperature monitoring
- Six-month shelf-life guarantee with monthly active oxygen titration verification
I risultati
Risultati chiave
- Continuo operation extended from 38 days to 119 days (213% improvement)
- Reactor fouling rate reduced by 74%
- Annuale unplanned shutdowns: 8 → 2
- Conversion rate improved by 3.2% (ethylene → LDPE)
- Prodotto grade transition time reduced by 28%
- Annuale production increase: +22,000 metric tons LDPE