PC Tougheners

Product Overview：

This series of products uses specialty elastomers as the base resin, incorporating maleic anhydride and epoxy functional groups through melt grafting technology. It is a high-performance toughening modifier specifically designed for polycarbonate systems. While significantly enhancing the notched impact strength and low-temperature toughness of PC, the products effectively address engineering challenges such as thick-wall brittleness, notch sensitivity, and chemical stress cracking resistance.

Core Value：

Fundamentally improves the notch sensitivity and thick-wall brittleness of PC, enabling standard PC to achieve high-toughness or even super-tough performance levels. The toughener solution offers a wide processing window, controllable costs, and highly predictable modification results, providing injection molding and extrusion processors with an efficient and stable path for performance upgrading.

Mechanism of Action：

The main chain of the toughener consists of flexible elastomer segments, with maleic anhydride or epoxy functional groups grafted onto the side groups. The elastomer phase forms submicron-sized dispersed particles within the PC matrix. Upon impact, these particles induce crazes and shear yielding, dissipating impact energy. The reactive functional groups chemically react with the hydroxyl end groups of PC molecular chains, forming strong chemical bonds at the interface and ensuring effective stress transfer from the matrix to the elastomer phase.

Performance Advantages：

1.Addressing Notch Sensitivity and Thick-Wall Brittleness. By introducing an elastomer phase into the matrix, a plastic deformation zone is formed ahead of the notch tip, absorbing energy and inhibiting crack propagation. This fundamentally improves the notch sensitivity and thick-wall brittleness of PC.

2.Excellent Low-Temperature Toughness. Utilizing elastomer base materials with low glass transition temperatures, the products retain elasticity even at -40°C or -60°C. The low-temperature impact strength retention rate is significantly higher than that of unmodified PC.

3.Improved Chemical Stress Cracking Resistance. The toughener particles act as microscopic energy dissipation sites, effectively arresting the propagation of microcracks induced by solvents, thereby broadening the application boundaries of PC in scenarios involving contact with chemical media.

4.Retention of Rigidity and Heat Resistance. Toughening is achieved through a phase-separated structure rather than overall matrix plasticization. With reasonable addition levels, the reductions in tensile strength, flexural modulus, and heat deflection temperature are limited. The products can also be synergistically used with glass fiber reinforced systems.

Product Performance Gradient：

Selection Guide：

Application Scenarios：

· Automotive Electronics and Lamp Components — Improve the brittleness of thick-wall injection molded parts while maintaining transparency and heat resistance.
· Consumer Electronics and Appliance Housings — Enhance drop impact resistance of thin-wall parts, maintaining dimensional accuracy.
· Power Tools and Industrial Structural Components — Meet reliability requirements under frequent impact and vibration conditions.
· Outdoor Facilities and Rail Transit — Adapt to usage environments with severe cold and large temperature variations.
· Medical Devices and Food Contact Components — Balance transparency with toughness; specific types comply with relevant regulatory requirements.

Technical Highlights：

· Effectively resolves PC notch sensitivity and thick-wall brittleness.
· Excellent low-temperature toughness retention, suitable for outdoor and cold region applications.
· Improved chemical stress cracking resistance.
· Minimal loss of rigidity and heat resistance; can be synergistically used with glass fiber.
· Suitable for various processing techniques including injection molding and extrusion.
· Specific types feature matched refractive index to maintain PC transparency.

A gradient product portfolio is offered for precise matching to different application scenarios and performance requirements. For detailed technical parameters or to request free sample testing, please contact our sales engineers, who will recommend the optimal solution for you.