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US 6,610,785 B1Granted
Thermoplastic olefin elastomers and process for their preparation
AssigneeMontell North America Inc.
InventorsGiuliano Cecchin, Enea Garagnani
Life of this patent
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Abstract
Disclosed are thermoplastic elastomeric compositions include: A) from 10 to 80% by weight of one or more crystalline polymer of propylene containing from 0.05 to 15% in moles of ethylenic unsaturation, or a mixture of the above polymer with a saturated thermoplastic olefin polymer in quantities lower than or equal to 80% by weight; B) from 20 to 90% by weight of an unsaturated elastomeric olefin polymer; the compositions having been dynamically cross-linked with a cross-linking agent which includes a free radical generator.
Claims4
A thermoplastic elastomeric composition consisting essentially of:
- A) from 10 to 80% by weight of at least one crystalline polymer of propylene containing from 0.05 to 15% in moles of ethylenic unsaturation and having an isotactic index greater than 70%, or a mixture of the above polymer with a saturated thermoplastic olefin polymer in quantities lower than or equal to 80% by weight of (A);
- B) from 20 to 90% by weight of an amorphous, unsaturated elastomeric olefin polymer;
- said composition having been dynamically cross-linked with a cross-linking agent comprising a free radical generator, and
- wherein said ethylenic unsaturation is incorporated into said crystalline polymer by reacting propylene with at least one diene selected from the group consisting of 1,3-butadiene, isoprene, 1,3-pentadiene, 1,4-hexadiene, dicyclopentadiene and 2-ethylidene-5-norbornene.
1 more element
Dependencies are inferred from the claim text.