Patent US4517246A successfully refreshed from Google Patents.
US4517246A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Particulate polyolefin molding material
Assignee: Sumitomo Chemical Co Ltd
•
Filing: 1982-10-29
•
Granted: 1985-05-14
•
Expires: 2002-10-29
Abstract
Abstract A particulate polyolefin molding material is disclosed. The material is comprised of a particulate polyolefin particle having a bulk density of 0.45 g/cc or more and a mean particle size of 150 to 2,000 mu , and a layer comprising a compounding additive and a binder formed on the surface of the particle. The material can be used in producing molded articles without first forming the material into pellets as is conventionally done.
Inventors
- 👤 Kiyoshi Matsuyama
- 👤 Kenji Ochi
- 👤 Hiroyuki Ogawa
- 👤 Takuya Suzaki
- 👤 Kazuyoshi Imai
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 21:24
CPC Classifications
C; C08; C08J; C08J3/00; C08J3/20; C08J3/22; C08J3/226; C08J3/203; C08J2323/00; C08J2323/02; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2982; Y10T428/2991; Y10T428/2998
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
54 words
A particulate polyolefin molding material, comprising a particulate polyolefin particle having a bulk density of 0.45 g/cc or more and a mean particle size of 150 to 2,000μ, and having a coating of at least one layer comprising at least one compounding additive and an organic binder formed on the surface of said particle.
Claim 2
Dependent Claim
54 words
A particulate polyolefin molding material, comprising a particulate polyolefin particle having a bulk density of 0.45 g/cc or more and a mean particle size of 150 to 2,000μ, and having a coating of at least one layer comprising at least one compounding additive and an organic binder formed on the surface of said particle.
Claim 3
Dependent Claim
29 words
The particulate polyolefin molding material as claimed in claim 1, wherein said binder has a melting point lower than that of said particulate polyolefin by at least 3° C.
Claim 4
Dependent Claim
21 words
The particulate polyolefin molding material as claimed in claim 1, wherein said particulate polyolefin is a crystalline propylene homopolymer or copolymer.
Claim 5
Dependent Claim
17 words
The particulate polyolefin molding material as claimed in claim 1, wherein said coating is a single layer.
Claim 6
Dependent Claim
17 words
The particulate polyolefin molding material as claimed in claim 1, wherein said compounding additive includes a filler.
Claim 7
Dependent Claim
32 words
The particulate polyolefin molding material as claimed in claim 5, wherein the amount of the filler is 10 to 200 parts by weight per 100 parts by weight of the particulate polyolefin.
Claim 8
Dependent Claim
29 words
The particulate polyolefin molding material as claimed in claim 5, wherein said coating is two layers comprising an inner filler-rich layer and an outer layer mainly containing the binder.
Claim 9
Dependent Claim
35 words
The particulate polyolefin molding material as claimed in claim 1, wherein said coating is two layers comprising an inner layer containing a stabilizer, and an outer layer mainly comprised of the filler and the binder.
Claim 10
Dependent Claim
38 words
The particulate polyolefin molding material as claimed in claim 1, wherein said coating is two layers comprising an inner layer containing a stabilizer and a pigment, and an outer layer mainly comprised of the filler and the binder.
Claim 11
Dependent Claim
41 words
The particulate polyolefin molding material as claimed in claim 1, wherein said coating is two layers comprising an inner layer containing a stabilizer, a pigment and additional auxiliary agents, and an outer layer mainly comprised of the filler and the binder.
References Cited (Backward Citations)
US3911193A
Cited
US4043962A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-05-13 | 1988-11-12 | 1989-05-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-05-13 | 1992-11-12 | 1993-05-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-05-13 | 1996-11-12 | 1997-05-14 | $7700.00 | Window Closed / Lapsed |