Maleic anhydride grafted polymers have become essential for improving interfacial adhesion and impact resistance in engineering polymer blends. For industrial buyers moving from research to evaluation, the challenge lies in matching precise technical parameters and compliance certifications to application needs.

Figure 1: KETONG's logistics hub enables stable supply of maleic anhydride grafted polymers across global markets.

Problem & Opportunity in MAH Polymer Procurement

Without standardized parameter mapping, buyers risk mismatches in MAH content or melt flow, leading to processing difficulties or performance failure. A supplier that clearly documents these constraints reduces evaluation risk. Shenyang Ketong New Materials Co., Ltd. (KETONG) provides a structured product ecosystem where each grade is defined by explicit maleic anhydride (MAH) grafting levels, melt flow ranges, and applicable certifications.

KETONG: A Specialized Manufacturer of MAH-Grafted Polymers

Shenyang Ketong New Materials Co., Ltd. is a high-tech enterprise specializing in the research, development, and production of functional polymer materials, including polymer compatibilizers, tougheners, and functional adhesive resins. Founded in 2003, the company operates a 30,000 m² facility with a planned annual production capacity of 60,000 tons. Its team of 130 employees includes 8 R&D engineers, supporting OEM/ODM customization. The product portfolio spans PP-g-MAH, PE-g-MAH, POE-g-MAH, SEBS-g-MAH, EVA-g-MAH, and specialty low-odor grades.

Figure 2: KETONG’s occupational health and safety management system is certified to ISO 45001:2018 (certificate 03825S03154R1M), covering R&D, production, and marketing for Global and EU markets.

Technical Specifications: MAH Content and Melt Flow Index

The grafting of maleic anhydride onto polyolefin backbones creates polar functionality that enhances miscibility with engineering polymers like nylon, polyester, and ABS. KETONG defines four MAH levels across its product lines: Low (<0.4%), Medium (0.4-0.8%), High (>0.8%), and Extra High (≥4.0%). Melt Flow Rate (MFR) is also specified per grade, enabling processability matching. For example, the polypropylene compatibilizer KT-1D offers MAH High (>0.8%) with MFR 90-120 g/10min, while the low-odor LEP-1B delivers MAH High (>0.8%) with MFR ≥80 g/10min. In the nylon toughener series, KT-916K provides MAH High (>0.8%) and MFR 9.0-13.0 g/10min (235°C/5kg) for high-flow applications.

Application Scenarios from Documented Use Cases

Based on documented customer projects, KETONG’s MAH-grafted polymers serve critical roles:

• Adhesive layer for multi-layer co-extrusion barrier films (KT-NJP2201) – Excellent adhesion to EVOH and PA, low gel spots, good transparency; used by a modified polymer manufacturer for 21 tons over one year.
• Reinforced and toughened nylon (KT-916K) – Significant impact resistance improvement, low-temperature performance down to -50°C; a 20-ton annual supply to a manufacturing customer.
• Glass fiber reinforced polypropylene (LEP-1B and KT-1 series) – Low VOC emission, enhanced aging resistance, and strong impact strength retention; 20–22 tons per year for glass-fiber and mineral-filled PP applications.

Market Trend: Certification-Driven Procurement

Industrial buyers increasingly require documented quality, environmental, and safety management systems. KETONG holds ISO 9001:2015 (certificate 03825Q03155R1M), ISO 14001:2015 (03825E03153R1M), and ISO 45001:2018 (03825S03154R1M) certifications, all issued by World Standards for Certification Center Inc., covering the research, development, production, and marketing of modified plastic masterbatches. These certifications apply to the Global and EU markets, supporting compliance in regulated sectors such as food packaging and automotive.

Comparison with Traditional Solutions

Traditional unmodified polyolefins lack the polar groups needed to bond with engineering resins, leading to delamination or weak interfaces. MAH-grafted polymers bridge this gap by providing covalent or hydrogen bonding sites. A recognized limitation: over-grafting can cause crosslinking or residual odor in sensitive applications. KETONG addresses this through its low-odor LEP series (LEP-1B, LEP-1K) for polypropylene, and LEP-2 for ABS, which maintain high MAH content (>0.8%) while minimizing volatile emissions.

Future Outlook

As polymer recycling, multi-material designs, and low-emission regulations continue to evolve, the demand for precisely characterized MAH graft levels and low-odor grades will grow. Suppliers with proven customization capabilities—such as formula customization, additive performance tuning (flame retardant, toughening, anti-oxidation, etc.)—and internationally recognized certifications will be better positioned to meet stringent industrial requirements.

For a comprehensive product overview, download the KETONG brochure here: Company Brochure (PDF).

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