SEBS-GMA

Y2346 is a reactive grafting modified product of SEBS grafted with GMA. This series adopts patented technology to graft glycidyl methacrylate (GMA) onto the SEBS backbone, producing a high-performance reactive compatibilizer. This product contains no plasticizing oil and offers high reactivity and storage stability. By introducing highly reactive epoxy functional groups (from GMA) onto the SEBS elastomer chain, Y2346 becomes an efficient reactive compatibilizer and toughening agent. The epoxy groups can react in situ during melt blending with polymers containing carboxyl, amino, or hydroxyl groups (e.g., PET, PBT, PA), significantly reducing interfacial tension and enhancing phase adhesion, providing unique “in-situ compatibilization” and “chemical bridging” effects. Y2346 combines the excellent elastic toughening properties of SEBS with the chemical reactivity of GMA, making it particularly suitable for improving compatibility between polyolefins and polar engineering plastics such as polyesters and polyamides, as well as demanding applications requiring strong interfacial bonding.

Product Appearance:Light yellow rubber particles (Y2346 is natural color particles)

Product Properties:

1. Highly reactive epoxy functional groups: High GMA grafting ratio (≥0.8%) provides abundant epoxy reactive sites, enabling chemical bonding with polymers or fillers containing carboxyl, amino, or hydroxyl groups.

2. No plasticizing oil: Ensures no oil migration during high-temperature processing or service, maintaining long-term stable performance and a dry surface.

3. Strong interfacial bonding: Forms strong chemical bridges between incompatible polymer phases through chemical reactions, greatly improving phase interface adhesion and stress transfer.

4. Excellent compatibilization effect: For blends with large polarity differences (e.g., polyolefin/polyester, polyolefin/polyamide), it offers stronger compatibilization than SEBS-MAH.

5. Improved overall performance: While enhancing compatibility, it significantly improves toughness, tensile strength, and heat aging resistance of alloys or composites.

Typical Applications:

1. Specialty TPE cable compounds and elastomers: Especially suitable for demanding cable formulations requiring adhesion to polar material layers or filled with large amounts of highly polar halogen-free flame retardants (e.g., magnesium hydroxide, aluminum hydroxide) – enhances interface through chemical reaction to prevent performance degradation.

2. High-performance engineering plastic alloys: For PP/PE with PET/PBT blend systems (polyolefin/polyester alloys). The epoxy groups of Y2346 react with polyester end-carboxyl groups, forming graft copolymers in situ – significantly refines dispersed phase size and greatly increases notched impact strength and elongation at break of the alloy.

3. Polyester (PET/PBT) toughening modification: For super-toughening modification of PET (including recycled PET) and PBT. Y2346 maintains the rigidity and heat resistance of polyesters while significantly improving low-temperature brittleness and notch sensitivity – suitable for injection molding grade toughened polyesters.

4. Polyamide (PA6/PA66) reactive toughening: As an efficient toughening agent for PA. The epoxy groups of GMA react with amino/carboxyl end groups of PA, forming a chemically bonded core-shell structure – higher toughening efficiency compared to non-reactive toughening agents (e.g., neat SEBS), while better maintaining material flowability.

5. Glass fiber/mineral filled polyolefin modification: Improves interfacial bonding between fillers (glass fiber, talc) and polypropylene (PP), polyethylene (PE) matrices – enhances strength, stiffness, and impact resistance of composites.

6. Adhesive layer material: Can be used as an adhesive layer component in multilayer co-extruded films or sheets requiring strong adhesion.

Technical Data:

Note: The above data are typical test values and should not be interpreted as specifications.

Recommended Addition Level:
The addition level of SEBS-GMA depends on the polarity difference and reactive requirements of the target system. The generally recommended addition range is 2%–8% of the total formulation. For systems with extremely poor interfacial compatibility or those requiring strong chemical bonding, the optimum addition ratio should be determined through trials.

Processing Recommendations:
Y2346 has good thermal stability. The recommended processing temperature range is 190°C–260°C. Avoid prolonged exposure to temperatures above 260°C to prevent loss or decomposition of epoxy group activity. The final processing temperature should be optimized based on the specific formulation, equipment type, and process conditions. Pilot trials are recommended before mass production.

Packaging and Storage:

1. Packaging: Paper-plastic composite bag, 25 kg/bag. Avoid moisture, contamination, and direct sunlight during transport.

2. Storage conditions: Store in a cool, dry, well-ventilated warehouse away from direct sunlight, ignition sources, and heat. Avoid direct contact with strong acids, strong bases, or amine compounds to prevent premature reaction. This product is hygroscopic – use promptly after opening and reseal tightly if not used up to prevent moisture absorption which may affect processing stability and reactivity.

3. Shelf life: 12 months from production date under proper storage conditions in original unopened packaging.

4. Safety precautions: Ensure good ventilation during high-temperature processing; avoid inhaling any trace fumes produced. Use protective gloves and goggles. Do not store with flammable or corrosive materials. Refer to the product SDS for detailed safety information.

Selection Support:
Multiple grades are available for different applications. For precise product selection, please contact our sales engineer for the best solution.