Atactic polypropylene
US5945496A · kind A · utility
36Cited by
0References
6Claims
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Assignee
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Key dates
| Filing date | Jun 18, 1997 |
| Grant date | Aug 31, 1999 |
| Priority date | — |
| Expiry date | Jun 18, 2017 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S526/943
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Amorphous propylene polymers are disclosed having the following characteristics: PA1 (a) intrinsic viscosity .eta.!>1 dl/g; PA1 (b) % (r)-% (m)>0, wherein % (r) is the % of syndiotactic diads and % (m) is the % of isotactic diads; PA1 (c) less than 2% of the CH.sub.2 groups contained in sequences (CH.sub.2).sub.n, with n.gtoreq.2; PA1 (d) Bernoullianity index (B)=1.+-.0.2; PA1 (e) melting enthalpy value lower than 10 J/g; and (f) Mw/Mn being less than 5.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.