Kosun is equipped with a senior, professional R&D team in resin synthesis and coating application. We are strictly market-driven, formulating exclusive R&D programs for global steel and aluminum coil pre-painting enterprises. We adhere to "Integrity, Continuous Innovation, Professional Service, Win-Win Cooperation" as we move forward together.
Formulating beautiful and robust protective armor for steel and aluminum coils with excellent durability.
Linyi Kosun Coatings Co., Ltd. is a fully licensed, high-tech enterprise specializing in the R&D, manufacture, and compliant supply of premium saturated polyester resins and high-performance industrial coil coatings. Established in December 2009, the company is located in the Tanyi Industrial Park, Feixian, Linyi, Shandong, covering a site area of approximately 14.5 acres (88 mu), with a total facility floor area of over 36,000 square meters and a total capital investment of 80 million RMB.
Our facility utilizes state-of-the-art integrated resin reaction vessels and modern automated coating formulation lines, supported by a full suite of analytical testing instrumentation for raw materials, intermediates, and final products. We specialize in serving pre-painted steel sheet (PPGI/PPGL), prepainted aluminum coil, and home appliance panel (PCM) manufacturers, delivering comprehensive coating systems spanning primers, backers, specialized topcoats (polyester, high-durability HDP, high-gloss), and industrial thinners.
To be the most trusted material R&D and technical service partner in the coil coating industry.
Driven by technical innovation to establish zero-defect, eco-compliant, industry-benchmark quality.
Fully certified, compliant, and professional. We do not just supply high-quality resins and coatings; we guarantee deep process optimization and a worry-free supply chain.
Possessing fully legal Business Licenses and Hazardous Chemicals Registration Certificates. Our fully certified high-standard production lines enable major steel mills and coil coating plants to maintain 100% compliant, stable, and uninterrupted supply chains under rigorous environmental regulations.
Kosun possesses a unique integrated R&D and manufacturing capability of upstream synthetic resins + downstream industrial coatings. We synthesize our own polyester resins (2102, 2313, etc.) and seamlessly optimize coating formulations, enabling deep physical property customization tailored to your line setup.
Spanning over 14.5 acres with an 80 million RMB investment, we operate advanced synthesis and blending equipment, yielding an annual capacity of 5,000 tons of resins and 10,000 tons of coil coatings. Backed by specialized logistics partners, we ensure rapid, high-quality dispatch within 3 to 5 days.
Our coatings and synthetic resins are widely applied in high-end corrugated roofing sheets, modular housing, PU foam-adhered cleanroom panels, and premium home appliance panels (PCM). Formulated for high-speed continuous roller coating lines, they align perfectly with your exact hardness, flexibility, and anti-corrosion metrics.
We go deep into your workshops. From viscosity adjustment and curing peak metal temperature (PMT) calibration, to line speed synchronization, dry film thickness control, and film defect (blistering, orange peel) diagnostics, our field engineers respond 24/7 to optimize your process parameters.
We are located in the Tanyi Industrial Park, Feixian, Linyi, Shandong. We provide airport/station pickup, guided facility tours, and deep technical exchanges. We look forward to partnering with you!
We deliver a comprehensive suite of coil coating systems spanning primers, backers, high-performance topcoats, and specialty industrial thinners, alongside premium saturated polyester resins. Supports live search and category filtering.
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| Testing Properties (Properties) | Technical Specifications (Specifications) | Testing Methods / Notes (Test Standard) |
|---|---|---|
Kosun exclusively brings the R&D center and coil coating workshop process calculators online! Enjoy real-time formula computation, organic solvents database queries, and online diagnostics of common coating defects.
Calculate the required curing agent mass per 100g of resin based on the stoichiometric equivalent ratio of hydroxyl resin to isocyanate curing agent.
Calculate the mass of volatile organic compounds per unit volume of liquid coatings (excluding water).
Calculate the required wet film thickness, dry film thickness, and theoretical paint consumption during continuous roller coating.
Real-time estimation and conversion between Ford Cup, DIN Cup, and dynamic viscosity for laboratory testing and workshop compounding (at 25°C).
A convenient database for process engineers to query and compare the physical properties of Xylene, PMA, CAC, S-100, and other common thinners.
| Solvent Name (Solvent) | Boiling Point (°C) | Evaporation Rate (n-Butyl Acetate = 1) | Flash Point (°C) | Surface Tension (mN/m) | Density (g/cm³, 20°C) | Hydrogen Bonding Value (h-bond) |
|---|---|---|---|---|---|---|
A handy guide for workshop front-line workers and technicians to quickly troubleshoot common defects such as bubbling, pinholes, cissing, and sagging.
No placeholder assets. 100% genuine photography from Kosun's technical manuals. Showcasing our green ecological plant and high-precision industrial roll coating applications.
The plant covers 88 mu, featuring a clean layout shaded by weeping willows, with the national and corporate flags symbolizing our eco-friendly chemical manufacturing identity.
Integrating administration, R&D, and reception，The grand architecture of the headquarters reflects our premium corporate image.
Shaded main avenues are equipped with complete safety signage, ensuring smooth logistics for raw materials and finished goods.
Pavilions and greenery create a low-carbon, ecological environment where nature and industry coexist harmoniously.
Fully enclosed, explosion-proof piping ensures high-precision resin transport with low energy consumption and zero emissions.
Equipped with multiple automated resin reactors and high-capacity blending vessels, yielding an annual capacity of 5,000 tons of resin and 10,000 tons of coatings.
Features exceptional high-speed wet leveling; the cured film is smooth, vibrant, scratch-resistant, and flexible.
Optimized for large steel mills, offering rapid leveling, robust adhesion, and superior MEK/boiling water resistance.
Precisely controlled primer, backer, and topcoat thickness provide 20+ years of corrosion protection for building substrates.
Maintains stability during high-speed slitting; thickness is highly consistent and T-bend performance exceeds national standards.
Ideal for high-end exterior panels and container sheets, featuring sharp patterns and excellent UV/yellowing resistance.
Widely used in industrial plants, cleanroom panels, and villa roofs, combining durability with classic aesthetics.
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We formulate custom coating and resin formulations for clients globally. Whether you need free sample trials, Technical Data Sheets (TDS), Safety Data Sheets (SDS), or bulk order pricing, our sales and engineering support teams will align with your needs instantly!
Our support team and chemical engineers will get back to you within 2 hours to arrange sample express shipping.
Thank you for your trust. Technical consultants from Kosun have received your inquiry and are selecting the optimal primer/backer or polyester formulations for your production line. We will call you back within 2 hours and ship sample packages!
