KETONG expands controlled MAH-grafted polymer production

Shenyang Ketong New Materials says a controlled maleic anhydride grafting process is helping standardize quality across its compatibilizer, toughener and adhesive resin lines as the company scales production in Shenyang. The move matters for compounders because performance in MAH-grafted polymers depends on tight control of graft level, melt flow and density.

Why it matters: - Controlled MAH grafting is central to the performance of compatibilizers, tougheners and adhesive resins used in polymer compounding. - KETONG is using that process control to reduce batch-to-batch variation in graft level, melt flow and density. - The company is also expanding planned capacity toward 60,000 tons per year at its second Shenyang factory. - Combined annual output from KETONG’s two manufacturing bases is expected to exceed about 110,000 tons.

What happened: - Shenyang Ketong New Materials Co., Ltd. said it is applying a controlled maleic anhydride grafting architecture across its compatibilizer, toughener and adhesive resin portfolio. - The company’s second Shenyang factory, completed in 2023, now anchors the production system. - KETONG began operations in 2003 as a high-technology enterprise focused on functional polymer materials. - The Shenyang Ketong New Materials site is at No. 40 Honghai Road, Yuhong District, Shenyang, Liaoning Province. - The site covers more than 30 acres and has a building area of 20,000 square meters. - The site is expected to eventually operate 10 production lines. - The original Shenyang Ketong Plastics factory covers 30,000 square meters and operates more than 10 imported production lines. - The original factory has an annual capacity of 50,000 tons.

The details: - KETONG groups MAH content into four bands: low below 0.4%, medium at 0.4% to 0.8%, high above 0.8%, and extra high at or above 4.0%. - The company says the grading system is paired with published melt flow rate and density ranges for each product. - KT-1D, a PP compatibilizer, has high MAH content above 0.8%, MFR of 90–120 g/10min at 190°C/2.16kg and density of 0.91–0.95 g/cm³. - LEP-1K, a low-odor PP compatibilizer, has high MAH content above 0.8%, MFR of at least 60 g/10min and density of 0.90–0.92 g/cm³. - KT-3, an ABS compatibilizer, has extra-high MAH grafting of at least 4.0%, MFR of 1.0–3.0 g/10min at 200°C/5kg and density of 1.00–1.05 g/cm³. - KT-916K, a nylon toughener, has high MAH content above 0.8%, MFR of 9.0–13.0 g/10min at 235°C/5kg and density of 0.86–0.88 g/cm³. - KT-915F, a nylon toughener based on POE-MAH-g-POE, also has high MAH content above 0.8%. - KT-915B and KT-913A are medium-MAH nylon toughening grades in the 0.4% to 0.8% band. - KT-12D, a PE compatibilizer, has high MAH content above 0.8%, MFR of 1.0–4.0 g/10min and density of 0.90–0.94 g/cm³. - KT-NJG3304, an adhesive resin, has low MAH content below 0.4%, MFR of 1.8–3.5 g/10min and density of 0.92–0.95 g/cm³. - KT-2628, an EVA compatibilizer, has high MAH content above 0.9%, MFR of 3.0–7.0 g/10min and density of 0.94–0.97 g/cm³. - KETONG says its quality management system is certified to ISO 9001:2015, ISO 14001:2015 and ISO 45001:2018. - The ISO 9001:2015 certificate number is 03825Q03155R1M, issued by World Standards for Certification Center Inc. for the Global and EU markets. - The ISO 14001:2015 certificate number is 03825E03153R1M. - The ISO 45001:2018 certificate number is 03825S03154R1M. - Earlier ISO registrations covering modified engineering plastics production include KT-NJG3304 adhesive resin under certificates 03824Q412511R0S, 03824E412512R0S and 03824S412513R0S. - KETONG says quality control includes random sampling inspection. - The company offers OEM, ODM, OBM, EMS, CMT and JDM cooperation models. - Product formula customization is available, along with additive performance customization for flame retardant, toughening, anti-oxidation, reinforcement and weather resistance requirements. - The company says shelf life is one year when unopened with intact packaging and three months after opening if the product is not contaminated or exposed to moisture. - Monthly output capacity is reported at 5,000–6,000 tons, with demand-driven scheduling. - Export markets include Southeast Asia, North America, Europe, the Middle East and Mexico. - Vietnam is listed as one of the company’s principal export destinations. - Sales offices are maintained in East China, South China and Southwest China.

Between the lines: - The company is positioning itself as a functional polymer converter, not a commodity MAH producer. - That matters because buyers in this market compare products on measurable specifications before physical trials begin. - The published MAH, melt flow and density windows are designed to make sourcing and incoming inspection more repeatable. - The company’s documentation also suggests that process stability and storage discipline are part of the sales pitch, especially for moisture-sensitive materials. - KETONG’s cited application examples show how the grades are used in barrier films, nylon toughening and reinforced polypropylene, but the examples do not prove universal performance. - Market data in the release points to growing demand for MAH-grafted specialty polymers in Asia Pacific and in downstream applications such as automotive materials.

What's next: - KETONG is expected to keep scaling production as the second Shenyang factory ramps up toward its planned capacity. - Buyers will likely focus on whether the company can maintain its published specification windows across larger volumes. - Further product documentation and technical details are available in the company’s announcement at the official website.

The bottom line: - KETONG is betting that tighter MAH graft control and clearer specifications will help it compete in higher-value functional polymer markets.