Sabic’s New Lnp™ Elcres™ Slx Resin Elevates Aesthetics, Durability of Paint-Free Exteriors


SABIC has introduced LNP™ ELCRES™ SLX1271SR resin, a new addition to its weatherable LNP SLX copolymer portfolio. This specialty material features enhanced scratch and mar resistance and a high-gloss surface finish to provide the automotive industry with a new molded-in color solution for exterior components. LNP ELCRES SLX1271SR resin also delivers exceptional weatherability, continuous UV stability and good mechanical performance. By adopting this new solution, customers can leverage the environmental and potential system cost advantages of paint elimination while maintaining the attractive appearance of exterior parts over time.

Innovations such as intrinsic UV absorption layer help this new resin maintain its gloss and mechanical performance over the life of the vehicle.

Reducing VOCs in Automotive Manufacturing
Studies  have shown that, considering a typical vehicle’s life cycle, the vast majority (95 percent) of volatile organic compounds (VOCs) are emitted during the painting process. Although the automotive industry is turning to solutions with lower environmental impact, such as waterborne paints, many of these products still emit some VOCs. Therefore, many manufacturers rely on thermoplastics with molded-in color to avoid VOC emissions and costly secondary operations. However, some of these materials have difficulty maintaining their original aesthetics, such as color depth and gloss, when exposed to abrasion, impact, harsh weather and UV light.

Paint-free LNP ELCRES SLX1271SR resin offers a new solution for reducing VOC emissions in automotive exterior components, while delivering excellent aesthetics comparable to those of incumbent solutions such as painted polycarbonate (PC) and painted PC/acrylonitrile-butadiene-styrene (PC/ABS) resins. For instance, in terms of scratch resistance and gloss retention, this new product showed similar performance to painted polymer substrates in the wet scrub (car wash) test. Further, the SABIC material can maintain its desirable aesthetics better than other paint-free thermoplastics – for up to 10 years or more. One reason is that the resin forms a self-protecting layer that absorbs UV light on a continuous basis to help retain color and gloss.

Raising the Bar on Paint-free Thermoplastics
LNP ELCRES SLX1271SR resin is formulated to deliver vivid, molded-in colors, such as piano black, and a high-gloss surface finish. SABIC conducted a comparison of this new product and competitive materials: a toughened PMMA grade and a blend of PMMA and acrylonitrile styrene acrylate (ASA). The results showed that LNP SLX1271SR resin provides better mechanical performance as well as improved gloss, color depth and heat resistance (~ 120?) compared to acrylic-based resins like PMMA or PMMA/ASA (heat resistance ~80?).

This new scratch-resistant grade extends SABIC’s weatherable portfolio, which provides a wide range of high-gloss, opaque colors as well as clear or tinted transparent colors. In addition to automotive exterior parts such as spoilers, grilles and mirror housings, it is well suited for computer electronics housings and outdoor infrastructure components like solar panels.


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