Rohm and Haas: Acrylic impact modifier for vinyl building profiles

Paraloid KM-399 is said to be 20% more efficient as an impact modifier in vinyl building profiles than any competing product. The new all-acrylic grade is supplied by Rohm and Haas Plastics Additives. KM-399 reportedly displays better low-temperature toughness than other acrylic modifiers or CPE. It exhibits outstanding weatherability in terms of color hold and impact retention in outdoor profiles like siding, fencing and window products, according to Rohm and Haas.

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