US3665059A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyphase propylene polymer-rubber compositions and process for their preparation
Assignee: Hercules LLC
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Filing: 1970-06-26
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Granted: 1972-05-23
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Expires: 1990-06-26
Abstract
Abstract Polyphase compositions having, as a continuous phase a propylene polymer and as a second phase a synthetic or natural rubber, are prepared by dispersing a propylene polymer of substantially all sub-micron particle size in the second phase and fusing the polymer under controlled conditions which assure the formation of the propylene polymer into a continuous phase.
Inventors
- 👤 Bert H Mahlman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 07:39
CPC Classifications
C; C08; C08J; C08J3/00; C08J3/005; C08F; C08F10/00; C08F10/04; C08F10/06; C08K; C08K5/00; C08L; C08L91/00; C08L91/06; C08L91/08; C08F110/00; C08F110/04; C08F110/06; C08F210/00; C08F210/04; C08F210/06; C08J2323/00; C08J2323/02; C08J2323/10; C08J2323/12; Y; Y10; Y10S; Y10S525/00; Y10S525/931; Y10S526/00; Y10S526/904; Y10S526/908; Y10S526/909
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
11 words
The process of claim 1 where the propylene polymer is polypropylene.
Claim 2
Dependent Claim
13 words
The process of claim 2 where the amorphous phase is ethylene-propylene copolymer rubber.
Claim 3
Dependent Claim
20 words
The process of claim 1 where the composition is shaped prior to fusion to form the continuous propylene polymer phase.
Claim 4
Dependent Claim
15 words
The process of claim 4 where the shape is a film adhered to a substrate.
Claim 5
Dependent Claim
37 words
The process of claim 1 where the amorphous second phase is rendered fluid by dissolving the same in a solvent at a temperature below that at which the propylene polymer melts or dissolves in the resulting solution.
Claim 6
Dependent Claim
26 words
The process of claim 1 where the cooling of the propylene polymer-amorphous phase solution is effected in the presence of a solvent for the amorphous phase.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-05-23 | 1975-11-22 | 1976-05-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-23 | 1979-11-22 | 1980-05-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-23 | 1983-11-22 | 1984-05-23 | $7700.00 | Window Closed / Lapsed |