US5574094A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyolefin compositions and process for their preparation
Assignee: Himont Inc
•
Filing: 1992-10-28
•
Granted: 1996-11-12
•
Expires: 2012-10-28
Abstract
Abstract Polyolefin compositions comprising one or more crystalline polymers or copolymers of 1-olefins having Melt Index values higher that 20 g/10 min, and, dispersed in the above mentioned polymers or copolymers, a cellulosic material in the form of particles or fiber, as well as the process for the preparation of the above mentioned compositions in pelletized form and their conversion into products by way of injection molding.
Inventors
- 👤 Decio Malucelli
- 👤 Fausto Cocola
- 👤 Francesco Forcucci
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 07:22
CPC Classifications
C; C08; C08L; C08L23/00; C08L23/02; C08L23/10; C08L23/14; C08L97/00; C08L97/02; C08K; C08K5/00; C08K5/04; C08K5/09; C08L2205/00; C08L2205/08; C08L23/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
104 words
A polyolefin composition consisting essentially of (a) a polymer material selected from the group consisting of crystalline polymers and copolymers of 1-olefins, linear or branched, containing 2-10 carbon atoms, the melt flow index (ASTM D 1238, Condition L) of which is 25-1000 g/10 min., (b) 0.1 to 10% by weight, with respect to the total weight of the composition, of polypropylene grafted with maleic anhydride as a compatibilizing agent, and (c) wood powder, the bulk density of which is 0.05-0.3 g/cm 3 , and the particles of which have average dimensions of 0.01-5 mm, at a concentration of 10-70% by weight of the composition.
Claim 2
Dependent Claim
104 words
A polyolefin composition consisting essentially of (a) a polymer material selected from the group consisting of crystalline polymers and copolymers of 1-olefins, linear or branched, containing 2-10 carbon atoms, the melt flow index (ASTM D 1238, Condition L) of which is 25-1000 g/10 min., (b) 0.1 to 10% by weight, with respect to the total weight of the composition, of polypropylene grafted with maleic anhydride as a compatibilizing agent, and (c) wood powder, the bulk density of which is 0.05-0.3 g/cm 3 , and the particles of which have average dimensions of 0.01-5 mm, at a concentration of 10-70% by weight of the composition.
References Cited (Backward Citations)
US3857799A
Cited
US4228116A
Cited
US4165302A
Cited
US4352897A
Cited
US4301047A
Cited
US4438228A
Cited
US4559376A
Cited
US4434258A
Cited
US4517246A
Cited
US4480061A
Cited
US4687793A
Cited
US4717743A
Cited
US4717742A
Cited
US4686257A
Cited
CA1252586A
Cited
US5008310A
Cited
US5164432A
Cited
US5116908A
Cited
US5206278A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1999-11-12 | 2000-05-13 | 2000-11-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2003-11-12 | 2004-05-13 | 2004-11-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2007-11-12 | 2008-05-13 | 2008-11-12 | $7700.00 | Window Closed / Lapsed |