Patent US4156703A successfully refreshed from Google Patents.
US4156703A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for improving the processability of polyolefins and improved polyolefin compositions
Assignee: Rohm and Haas Co
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Filing: 1975-12-16
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Granted: 1979-05-29
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Expires: 1995-12-16
Abstract
Abstract A composition comprising polyethylene and a minor amount of an acrylic polymer, and a process for improving processability of polyethylene comprising blending therewith an acrylic polymer is disclosed.
Inventors
- 👤 William H. Harrop
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 19:47
CPC Classifications
C; C08; C08L; C08L23/00; C08L23/02; C08L23/04; C08L23/06; C08L33/00; C08L33/04; C08L33/06; C08L33/08
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
46 words
A chelating agent-free composition comprising a melt blend of polyethylene having a molecular weigh M v of above 600,000 and about 1 to 25% of an acrylic polymer polymerized from a monomer system comprising at least 50% by weight methyl methacrylate and the remainder another acrylate.
Claim 2
Dependent Claim
46 words
A chelating agent-free composition comprising a melt blend of polyethylene having a molecular weigh M v of above 600,000 and about 1 to 25% of an acrylic polymer polymerized from a monomer system comprising at least 50% by weight methyl methacrylate and the remainder another acrylate.
Claim 3
Dependent Claim
12 words
The composition of claim 1, wherein said polyethylene is high density polyethylene.
Claim 4
Dependent Claim
20 words
The composition of claim 1, wherein said acrylic polymer has a molecular weight (M v ) of at least 100,000.
Claim 5
Dependent Claim
13 words
The composition of claim 1, wherein said acrylic polymer is a multistage polymer.
Claim 6
Dependent Claim
14 words
The composition of claim 1, wherein said acrylic polymer is a single stage polymer.
Claim 7
Dependent Claim
11 words
The composition of claim 1, wherein said acrylate is ethyl acrylate.
Claim 8
Dependent Claim
57 words
A process comprising melt blending polyethylene having a molecular weight M v of above 600,000 with about 1 to 25% of an acrylic polymer polymerized from a monomer system comprising at least 50% by weight methyl methacrylate with the remainder another acrylate, and injection molding, extruding, foaming, or blow molding the blend so as to form articles.
Claim 9
Dependent Claim
57 words
A process comprising melt blending polyethylene having a molecular weight M v of above 600,000 with about 1 to 25% of an acrylic polymer polymerized from a monomer system comprising at least 50% by weight methyl methacrylate with the remainder another acrylate, and injection molding, extruding, foaming, or blow molding the blend so as to form articles.
Claim 10
Dependent Claim
8 words
Articles formed by the process of claim 7.
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) | 1982-05-28 | 1982-11-27 | 1983-05-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-05-28 | 1986-11-27 | 1987-05-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-05-28 | 1990-11-27 | 1991-05-29 | $7700.00 | Window Closed / Lapsed |