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US4301047A
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Free-flowing polyolefin molding composition of high filler content, process for its manufacture and its use
Assignee: Hoechst AG
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Filing: 1980-03-12
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Granted: 1981-11-17
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Expires: 2000-03-12
Abstract
Abstract Free-flowing polyolefin molding compositions having a very high filler content are obtained, if instead of the individual fillers there is used a mixture of wood flour and chalk or talc.
Inventors
- 👤 Barry M. Jones
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 18:35
CPC Classifications
C; C08; C08K; C08K3/00; C08K3/18; C08K3/24; C08K3/26; C08K3/34; C08K5/00; C08K5/04; C08K5/09; C08K5/098; C08K5/10; C08L; C08L23/00; C08L23/02; C08L23/10; C08L97/00; C08L97/02
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
55 words
A free-flowing polyolefin molding composition having a high filler content and containing from 40 to 60% by weight of polyolefin powder and from 60 to 40% by weight of a filler mixture of from 30 to 75 parts by weight of wood flour and from 70 to 25 parts by weight of chalk or talc.
Claim 2
Dependent Claim
55 words
A free-flowing polyolefin molding composition having a high filler content and containing from 40 to 60% by weight of polyolefin powder and from 60 to 40% by weight of a filler mixture of from 30 to 75 parts by weight of wood flour and from 70 to 25 parts by weight of chalk or talc.
Claim 3
Dependent Claim
30 words
Polyolefin molding composition as claimed in claim 1, which contains from 45 to 55% by weight of polyolefin powder and from 55 to 45% by weight of the filler mixture.
Claim 4
Dependent Claim
37 words
Polyolefin molding composition as claimed in claims 1 or 2, wherein the filler mixture contains from 40 to 60 parts by weight of wood flour and from 60 to 40 parts by weight of chalk or talc.
Claim 5
Dependent Claim
16 words
Polyolefin molding composition as claimed in claims 1, 2 or 3, which contains polypropylene as polyolefin.
Claim 6
Dependent Claim
31 words
Polyolefin molding composition as claimed in claims 1, 2, 3 or 4, which contains as wood flour pine wood flour having a particle size of from 200 to 700 μm .
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-11-16 | 1985-05-18 | 1985-11-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-11-16 | 1989-05-18 | 1989-11-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-11-16 | 1993-05-18 | 1993-11-17 | $7700.00 | Window Closed / Lapsed |