US4380522A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the manufacture of articles from composition comprising modified polyolefines and cellulosic fibres
Assignee: Solvay SA
•
Filing: 1981-04-13
•
Granted: 1983-04-19
•
Expires: 2001-04-13
Abstract
Abstract A process for the manufacture of shaped articles from compositions containing 30 to 70% by weight of polyolefine which is a high density polyethylene modified with polar monomers and 30 to 70% by weight of cellulosic fibres. These compositions are malaxated at a temperature at least 20° C. above the melting point of the polyolefine. The process is applicable to the manufacture of panels which can be used in the automobile industry.
Inventors
- 👤 Pierre Georlette
- 👤 Rene Bouteille
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 04:35
CPC Classifications
C; C08; C08L; C08L51/00; C08L51/06; B; B27; B27N; B27N3/00; B27N3/002; B27N3/04; C08L23/00; C08L23/02; C08L23/025; C08L23/04; C08L23/06; C08L51/006; C08L97/00; C08L97/02; C08K; C08K5/00; C08K5/04; C08K5/14; C08L2205/00; C08L2205/14; C08L2205/16
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
76 words
Process for manufacture of a shaped article from a polyolefine composition comprising between 30 and 70% by weight of a polyolefine which is a high density polyethylene modified by means of a polar monomer and between 30 and 70% by weight of cellulosic fibres, comprising: subjecting the polyolefine composition to a malaxating operation carried out at a temperature which is at least 40° C. above the melting point of the polyolefine, before the composition is moulded.
Claim 2
Dependent Claim
76 words
Process for manufacture of a shaped article from a polyolefine composition comprising between 30 and 70% by weight of a polyolefine which is a high density polyethylene modified by means of a polar monomer and between 30 and 70% by weight of cellulosic fibres, comprising: subjecting the polyolefine composition to a malaxating operation carried out at a temperature which is at least 40° C. above the melting point of the polyolefine, before the composition is moulded.
Claim 3
Dependent Claim
25 words
Process according to claim 1 wherein the polyolefine is a modified high density polyethylene having a melt index of between 0.5 and 10 g/10 min.
Claim 4
Dependent Claim
19 words
Process according to claim 1 or 2, wherein the polyolefine is a polyolefine modified by means of maleic anhydride.
Claim 5
Dependent Claim
21 words
Process according to claim 1 or 2, wherein the polyolefine is a polyolefine modified by grafting by means of polar monomers.
Claim 6
Dependent Claim
24 words
Process according to claim 4, wherein the polyolefine composition is prepared by directly mixing the unmodified polyolefine, the polar monomer and the cellulosic fibres.
Claim 7
Dependent Claim
16 words
Process according to claim 1 or 2, wherein the polyolefine composition is moulded directly after malaxating.
Claim 8
Dependent Claim
15 words
Process according to claim 6, wherein the polyolefine composition is moulded into panels by calendering.
References Cited (Backward Citations)
US3645939A
Cited
US3862265A
Cited
US3962157A
Cited
FR2252206A1
Cited
GB1479335A
Cited
US3915910A
Cited
FR2253784B1
Cited
FR2322001B1
Cited
US4144304A
Cited
BE860469A
Cited
BE862136A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-04-18 | 1986-10-18 | 1987-04-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-04-18 | 1990-10-18 | 1991-04-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-04-18 | 1994-10-18 | 1995-04-19 | $7700.00 | Window Closed / Lapsed |