Atactic polypropylene
US5596052A · kind A · utility
148Cited by
1References
5Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 25, 1996 |
| Grant date | Jan 21, 1997 |
| Priority date | — |
| Expiry date | Mar 25, 2016 |
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 d1/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. These propylene polymers, which are in addition endowed with a narrow molecular weight distribution, can be obtained directly from the polymerization reaction of propylene as sole product and, therefore, do not require to be separated.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.