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US 2002/0177665 A1Published application
Compositions of random copolymers of propene containing an alpha-olefin as comonomer
AssigneeBasell Poliolefine Italia S.r.l.
InventorsEnrico Beccarini, Anteo Pelliconi
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Abstract
Semicrystalline polyolefin composition comprising copolymers a), b) and c) of prolylene with at least one comonomer selected from C4-C10α-olefins, where the total content of recurring units from the said comonomer, referred to the composition, is equal to or higher than 6% and teh respecive percentages representing the content of said recurring units in each one of the copolymers a), b) and c) are different from each other, said difference being of at least 1 unit.
Claims14
A semicrystalline polyolefin composition comprising (all percentages by weight):
- a) 25-40%, preferably 28-38%, of a random copolymer of propylene with at least one comonomer selected from C4-C10α-olefins, containing from 2 to 10% of recurring units deriving from the comonomer;
- b) 25-40%, preferably 26-36%, of a random copolymer of propylene with at least one comonomer selected from C4-C10α-olefins, containing from 10 to 20% of recurring units deriving from the comonomer;
- c) 25-40%, preferably 28-38%, of a random copolymer of propylene with at least one comonomer selected from C4-C10α-olefins, containing from 6 to 12% of recurring units deriving from the comonomer;
- where the total content of recurring units from the said comonomer, referred to the composition, is equal to or higher than 6% and the respective percentages representing the content of the said recurring units in each one of copolymers a), b) and c) are different from each one of the other two, said difference with respect to the percentage of recurring units in each one of the other two copolymers being of at least 1 unit, preferably 1.5 units.
1 more element
Dependencies are inferred from the claim text.