Patent US4252764A successfully refreshed from Google Patents.
US4252764A
Expired / Lapsed
US
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Process for preparing molding compositions
Assignee: Bayer Antwerpen NV
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Filing: 1979-04-25
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Granted: 1981-02-24
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Expires: 1999-04-25
Abstract
Abstract Improved molding compositions and a dry blend process for preparing same, such compositions being especially adapted for fabrication into packaging materials and comprising an intimate blend of a styrene polymer and myrcene compound.
Inventors
- 👤 Edward F. Tokas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 13:30
CPC Classifications
B; B29; B29B; B29B9/00; B29B9/02; B29B9/06; C; C08; C08K; C08K5/00; C08K5/01
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
75 words
A process for preparing an extruded, pelleted molding composition for use in environmentally sensitive packaging applications which comprises: (a) dry blending a styrenic polymer containing free styrene monomer with about 0.005 to about 2 percent by weight of myrcene based on the weight of the styrenic polymer, wherein the styrenic polymer comprises at least about 10 percent by weight of polymerized styrene; (b) melting and extruding the resulting blend; and then (c) pelletizing the extrudate.
Claim 2
Dependent Claim
75 words
A process for preparing an extruded, pelleted molding composition for use in environmentally sensitive packaging applications which comprises: (a) dry blending a styrenic polymer containing free styrene monomer with about 0.005 to about 2 percent by weight of myrcene based on the weight of the styrenic polymer, wherein the styrenic polymer comprises at least about 10 percent by weight of polymerized styrene; (b) melting and extruding the resulting blend; and then (c) pelletizing the extrudate.
Claim 3
Dependent Claim
32 words
The process of claim 1 wherein the styrenic polymer comprises about 10 to about 50 percent by weight of polymerized styrene and about 90 to about 50 percent by weight polymerized acrylonitrile.
Claim 4
Dependent Claim
20 words
The process of claim 1 wherein the styrenic polymer comprises at least about 50 percent by weight of polymerized acrylonitrile.
Claim 5
Dependent Claim
28 words
The process of claims 1, 2 or 3 wherein the styrenic polymer further contains about 0 to 25 percent by weight of a synthetic or natural rubber component.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-02-24 | 1984-08-25 | 1985-02-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-02-24 | 1988-08-25 | 1989-02-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-02-24 | 1992-08-25 | 1993-02-24 | $7700.00 | Window Closed / Lapsed |