Claims
- 1. Alpha olefin polymers of homogenous composition comprising alternating isotactic and atactic diastereosequences, in which all polymer fractions have similar molecular weight distributions, M.sub.w /M.sub.n, of less than 7, an isotactic Block Index greater than about 5, an mmmm of above 9%, an average molecular weight, M.sub.w, greater than about 20,000, a melting point of above 79.degree. C. and which polymers are elastomeric in exhibiting a positive power of recovery for elongation above about 100%.
- 2. Alpha olefin polymers as in claim 1 which have a melting point above about 112.degree. C.
- 3. Alpha olefin polymers as in claim 2 which exhibit low molecular weight distributions M.sub.w /M.sub.n, of below about 5.
- 4. Alpha olefin polymers as in claim 3 which are highly regioregular as evidenced by a substantial absence of 2,1 regioerror insertions.
- 5. Alpha olefin polymers as in claim 4 which exhibit an mmmm content in the range of from above 9 to about 71%.
- 6. Alpha olefin polymers as in claim 5 which are thermoplastic elastomers having mechanical properties of low tensile set of below about 70% at 300% elongationand high ultimate elongation in excess of about 960%.
- 7. Alpha olefin polymers as in claim 6 wherein said polymer is polypropylene.
- 8. Alpha olefin polymers as in claim 1 wherein said alpha olefin is selected from at least one linear or branched C.sub.3 -C.sub.10 monomer.
- 9. Alpha olefin polymers as in claim 8 wherein said C.sub.3 -C.sub.10 monomers are selected from propylene, 1-butene, 1-pentene, 4-methyl-1-pentene, and 1-hexene.
- 10. Alpha olefin polymers as in claim 9 wherein said polymer is polypropylene.
- 11. Thermoplastic elastomeric polypropylene as in claim 10 which has at least one of the following properties:
- a) a low tensile set of below about 70% at 300% elongation; and
- b) a high ultimate elongation in excess of about 960%.
- 12. Thermoplastic elastomeric polypropylene as in claim 11 which has:
- a) a Block Index in the range of from about 5-100; and
- b) at least one property selected from:
- i) an average molecular weight M.sub.w in the range of from 67,000 to 1,350,000;
- ii) said molecular weight distribution is in the range of from about 1.5 to 4.0;
- (iii) a melting point in the range of from about 125.degree. C. to about 165.degree. C.; and
- (iv) a high regioregularity as characterized by a substantial absence of 2,1 regioerror insertions.
- 13. Alpha olefin polymers as in claim 9 which include a minor amount of ethylene as a monomer.
- 14. A homogeneous alpha olefin polymer directly obtainable from a polymerization reaction of at least one alpha olefin monomer, said polymer comprising alternating isotactic and atactic blocks, having an isotactic pentad (mmmm) content greater than 9%, a molecular weight distribution, M.sub. /M.sub.n, of between about 2.6 to about 7, a melting point of above about 50.degree. C., an average molecular weight, M.sub.w, greater than about 20,000, and which is elastomeric in exhibiting a positive power of recovery for elongation above about 100%.
- 15. A homogeneous alpha olefin polymer as in claim 14 wherein said monomer is selected from at least one linear or branched C.sub.3 -C.sub.10 monomer.
- 16. A homogeneous alpha olefin polymer as in claim 15 wherein the isotactic pentad content is between 9% and 71%, and which are highly regioregular as evidenced by a substantial absence of 2,1 regioerror insertions.
- 17. A homogeneous alpha olefin polymer as in claim 15 wherein the melting point is above about 112.degree. C.
- 18. A homogeneous alpha olefin polymer as in claim 15 wherein said positive power of recovery is exhibited for elongations above about 200%.
- 19. A homogeneous alpha olefin polymer as in claim 14 wherein said melting point in the range of from above about 112.degree. C. to about 165.degree. C.
- 20. A homogeneous alpha olefin polymer as in claim 19 wherein said alpha olefin monomers are selected from propylene, 1-butene, 1-pentene, 4-methyl-1-pentene, and 1-hexene.
- 21. A homogeneous alpha olefin polymer as in claim 20 wherein at least one of said alpha olefin monomers is propylene.
CROSS REFERENCE TO RELATED APPLICATION
This is a continuation in part of U.S. Ser. No. 08/218,210 filed by us on Mar. 24, 1994, now U.S. Pat. No. 5,594,080 entitled "Thermoplastic Elastomeric Olefin Polymers, Methods of Production and Catalysts Therefor", now U.S. Pat. No. 5,594,080, the benefit of the priority date of which is claimed under 35 USC .sctn.119 and .sctn.120, and Treaties and PCT Rules.
PCT Information
Filing Document |
Filing Date |
Country |
Kind |
102e Date |
371c Date |
PCT/US95/03597 |
3/24/1995 |
|
|
12/20/1996 |
12/20/1996 |
Publishing Document |
Publishing Date |
Country |
Kind |
WO95/25757 |
9/28/1995 |
|
|
US Referenced Citations (10)
Foreign Referenced Citations (1)
Number |
Date |
Country |
WO 9620225 |
Jul 1996 |
WOX |
Non-Patent Literature Citations (4)
Entry |
Gauthier et al. Elastomeric Poly(propylene): Influence of Catalyst Structure and Polymerization Conditions on Polymer Structure and Properties, Macromolecules 1995, 28, 3771-3778. |
Tsvetkova et al., Synthesis of Elastomeric Polypropynlene in Bulk Using The (2-Phlnd).sub.2 ZrCl.sub.2 Homogenous Catalyst, Polymer Science, Series A, vol. 39, No. 3 (1997), 235-240. |
Hauptman and Waymouth, Stereoblock Polypropylene: Ligand Effects on Stereospecificity of 2-Arylindene Zirconocene Catalysts, J. Am. Chem. Socy. 1995, 117, 11586-11587. |
McKnight, Masood & Waymouth, Selectivity in Propylene Polymerization with Group 4-Cp-Amido Catalysts, Organometallics, 1997, 16, 2879-2885. |
Continuation in Parts (1)
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Number |
Date |
Country |
Parent |
218210 |
Mar 1994 |
|