Patent US5945496A successfully refreshed from Google Patents.
US5945496A
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Atactic polypropylene
Assignee: Basell Technology Co BV
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Filing: 1997-06-18
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Granted: 1999-08-31
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Expires: 2017-06-18
Abstract
Abstract Amorphous propylene polymers are disclosed having the following characteristics: (a) intrinsic viscosity η!>1 dl/g; (b) % (r)-% (m)>0, wherein % (r) is the % of syndiotactic diads and % (m) is the % of isotactic diads; (c) less than 2% of the CH 2 groups contained in sequences (CH 2 ) n , with n≧2; (d) Bernoullianity index (B)=1±0.2; (e) melting enthalpy value lower than 10 J/g; and (f) Mw/Mn being less than 5.
Inventors
- 👤 Luigi Resconi
- 👤 Enrico Albizzati
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 08:47
CPC Classifications
C; C08; C08F; C08F110/00; C08F110/04; C08F110/06; C08F4/00; C08F4/42; C08F4/44; C08F4/60; C08F4/62; C08F4/64; C08F4/659; C08F4/65908; C08F4/6592; C08F4/65922; C08F4/65927; C08F4/65912; Y; Y10; Y10S; Y10S526/00; Y10S526/943
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
86 words
An amorphous propylene polymer, directly obtained from a propylene polymerization reaction, having the following characteristics: (a) intrinsic viscosity η! greater than 1 dl/g; (b) the percentage of syndiotactic diads (r) minus the percentage of isotactic diads (m) being greater than 0; (c) less than 2% of the CH 2 groups contained in sequences (CH 2 ) n , with n being greater than or equal to 2; (d) Bemouillianity index (B)=1±0.2; (e) melting enthalpy value lower than 10 J/g; and (f) Mw/Mn being less than 5.
Claim 2
Dependent Claim
86 words
An amorphous propylene polymer, directly obtained from a propylene polymerization reaction, having the following characteristics: (a) intrinsic viscosity η! greater than 1 dl/g; (b) the percentage of syndiotactic diads (r) minus the percentage of isotactic diads (m) being greater than 0; (c) less than 2% of the CH 2 groups contained in sequences (CH 2 ) n , with n being greater than or equal to 2; (d) Bemouillianity index (B)=1±0.2; (e) melting enthalpy value lower than 10 J/g; and (f) Mw/Mn being less than 5.
Claim 3
Dependent Claim
16 words
The amorphous propylene polymer according to claim 1, having intrinsic viscosity η! greater than 1.5 dl/g.
Claim 4
Dependent Claim
16 words
The amorphous propylene polymer according to claim 1, having a melting enthalpy value of 0 J/g.
Claim 5
Dependent Claim
82 words
An amorphous propylene polymer having the following characteristics: (a) intrinsic viscosity η! greater than 1 dl/g; (b) the percentage of syndiotactic diads (r) minus the percentage of isotactic diads (m) being greater than 0; (c) less than 2% of the CH 2 groups contained in sequences (CH 2 ) n , with n being greater than or equal to 2; (d) Bernoullianity index (B)=1±0.2; (e) M w /M n being less than 5; and (f) melting enthalpy value lower than 10 J/g.
Claim 6
Dependent Claim
82 words
An amorphous propylene polymer having the following characteristics: (a) intrinsic viscosity η! greater than 1 dl/g; (b) the percentage of syndiotactic diads (r) minus the percentage of isotactic diads (m) being greater than 0; (c) less than 2% of the CH 2 groups contained in sequences (CH 2 ) n , with n being greater than or equal to 2; (d) Bernoullianity index (B)=1±0.2; (e) M w /M n being less than 5; and (f) melting enthalpy value lower than 10 J/g.
Claim 7
Dependent Claim
16 words
The amorphous propylene polymer according to claim 4, having intrinsic viscosity η! greater than 1.5 dl/g.
Claim 8
Dependent Claim
16 words
The amorphous propylene polymer according to claim 4, having a melting enthalpy value of 0 J/g.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2002-08-30 | 2003-03-01 | 2003-08-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2006-08-30 | 2007-03-01 | 2007-08-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2010-08-30 | 2011-03-01 | 2011-08-31 | $7700.00 | Window Closed / Lapsed |