Modified polyolefins with an exceptional profile of properties, process for preparation thereof and use thereof
AssigneeEvonik Degussa GmbH
InventorsHinnerk Gordon Becker, Lutz Mindach, Holger Kautz, Miriam Ammer
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Abstract
Modified polyolefins with syndiotactic structural elements and a processes for preparation thereof are provided. The modified polyolefins are useful as an adhesive or as a constituent of adhesives.
Claims23
A modified polyolefin, obtained by functionalization of a unfunctionalized polyolefin which is obtained by polymerizing a monomer composition, comprising:
- ethylene in a proportion of not more than 20% by mass;
- propylene in a proportion of either 50-98% by mass or not more than 15% by mass;
- and
- 1-butene in a proportion of 87-98% by mass or not more than 55% by mass;
- wherein
- a sum of the proportions is 100% by mass and the unfunctionalized polyolefin comprises no components of <500 D,
- a triad distribution for the propylene in the unfunctionalized polyolefin comprises:
- 32-90% by mass of a syndiotactic triad,
- not more than 25% by mass of an isotactic triad, and
- not more than 65% by mass of an atactic triad, and/or
- a triad distribution for the 1-butene in the unfunctionalized polyolefin comprises:
- not more than 96% by mass of a syndiotactic triad, and
- not more than 45% by mass of a isotactic triad,
- the triad content is determined by 13C NMR,
- the sum of isotactic, syndiotactic and atactic triads of propene and 1-butene each add up to 100%,
- the unfunctionalized polyolefin is obtained by polymerization with a metallocene catalyst, and
- functionalizing the unfunctionalized polyolefin comprises grafting one or more monomers having one or more functional groups onto the unfunctionalized polyolefin.
A modified polyolefin, obtained by functionalization of a unfunctionalized polyolefin which is obtained by polymerizing a monomer composition, comprising:
- from 7 to 16% by mass of 1-butene, from 3 to 8% by mass of ethylene, and from 78 to 83% by mass of propylene;
- a sum of the proportions is 100% by mass,
- a triad distribution for the propylene in the unfunctionalized polyolefin comprises:
- 32-90% by mass of a syndiotactic triad,
- not more than 25% by mass of an isotactic triad, and
- not more than 65% by mass of an atactic triad, and/or
- a triad distribution for the 1-butene in the unfunctionalized polyolefin comprises:
- not more than 96% by mass of a syndiotactic triad, and
- not more than 45% by mass of a isotactic triad,
- the triad content is determined by 13C NMR,
- the sum of isotactic, syndiotactic and atactic triads of propene and 1-butene each add up to 100%,
- the unfunctionalized polyolefin is obtained by polymerization with a metallocene catalyst, and
- functionalizing the unfunctionalized polyolefin comprises grafting one or more monomers having one or more functional groups onto the unfunctionalized polyolefin.
A modified polyolefin, obtained by functionalization of a unfunctionalized polyolefin which is obtained by polymerizing a monomer composition, comprising:
- ethylene in a proportion of not more than 20% by mass;
- propylene in a proportion of not more than 15% by mass;
- and
- 1-butene in a proportion of 87-98% by mass;
- wherein
- a sum of the proportions is 100% by mass,
- a triad distribution for the 1-butene in the unfunctionalized polyolefin comprises:
- not more than 96% by mass of a syndiotactic triad, and
- not more than 45% by mass of a isotactic triad,
- the triad content is determined by 13C NMR,
- the sum of isotactic, syndiotactic and atactic triads of propene and 1-butene each add up to 100%,
- the unfunctionalized polyolefin is obtained by polymerization with a metallocene catalyst, and
- functionalizing the unfunctionalized polyolefin comprises grafting one or more monomers having one or more functional groups onto the unfunctionalized polyolefin.
Dependencies are inferred from the claim text.