Propene terpolymers with a low extractable portion

Abstract

Propene terpolymers consist of from 80 to 99.5 mol % of structural units derived from propene, from 0.1 to 15 mol % of structural units derived from ethene or a C4-C6-1-olefin (I) and from 0.1 to 15 mol % of structural units derived from a further C4-C12-1-olefin (II) which is different from the C4-C6-1-olefin (I), which propene terpolymers have a proportion of regioregular ′1-2′-inserted propene units corresponding to the formula (1) [ ′ ⁢ 1 - 2 ′ ] [ ′ ⁢ 1 - 2 ′ ] + [ ′ ⁢ 2 - 1 ′ ] + [ ′ ⁢ 1 - 3 ′ ] ( 1 ) of more than 0.99, have a melting point (TM), determined from the DSC peak maximum, of less than 135° C. and a weight average molecular weight (MW) of more than 80,000 g/mol and have a xylene-soluble proportion (XS) in % by weight of the propene terpolymer which obeys the following inequality (2) XS≦1411.21 exp(−0.0591 TM[° C.])−0.05  (2).

Dependencies are inferred from the claim text.