Impact-resistance modifier suitable for PVC materials

• Main Authors: LANDHERR, KENNETH, HUMMERICH, RAINER, MEISTER, MARTIN, WEISS, AXEL, NOLTE, RAINER
• Format: Patent
• Language: English; French; German
• Published: 28.05.2003
• Edition: 7
• Subjects: CHEMISTRY; COMPOSITIONS BASED THEREON; COMPOSITIONS OF MACROMOLECULAR COMPOUNDS; MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVINGCARBON-TO-CARBON UNSATURATED BONDS; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP

An impact modifier for PVC molding compositions including a graft copolymerizate from (wt.%): a hard polymerizate forming monomer A (10-40) and a crosslinked polyacrylate rubber from a monomer B, the modifier having a mean particle size of 100-400 nm is new. An impact modifier for PVC molding compositions including a graft copolymerizate from (wt.%): a hard polymerizate forming monomer A (10-40) and a crosslinked polyacrylate rubber from a monomer B, the modifier having a mean particle size of 100-400 nm, where the graft copolymer has a multimodal particle size distribution and contains at least two types of graft rubber of identical chemical composition, but differing in particle diameter by at least 30 nm, where the amount of graft rubber type X of larger particle diameter is at least 15% and the amount of graft rubber of smaller particle diameter is at least 5%. An Independent claim is also included for PVC molding compositions containing the impact modifier (1-25).