US4031062A
Expired / Lapsed
US
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Polyolefin composition and process for preparing the same
Assignee: Sumitomo Chemical Co Ltd
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Filing: 1974-09-26
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Granted: 1977-06-21
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Expires: 1994-09-26
Abstract
Abstract A polyolefin composition having high adhesive strength comprising a reaction product of (1) a crystalline polyolefin, (2) at least one compound selected from the group consisting of unsaturated aliphatic carboxylic acids and anhydrides thereof and (3) magnesium oxide, and a process for preparing the polyolefin composition are disclosed.
Inventors
- 👤 Kenzo Shirayama
- 👤 Shinichiro Kita
- 👤 Masanori Fujimoto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 18:27
CPC Classifications
C; C08; C08F; C08F8/00; C08F8/42; C09; C09J; C09J123/00; C09J123/26; C08L; C08L2666/00; C08L2666/54
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
76 words
A process for preparing a polyolefin composition having high adhesive strength which comprises reacting together for 30 seconds to 10 minutes (1) a crystalline polyolefin, (20 at least one unsaturated acid component selected from the group consisting of unsaturated aliphatic carboxylic acids and anhydrides thereof and (3) magnesium oxide in an amount of from 5 to 20% by weight based on the weight of the polyolefin, at a temperature above the melting point of said polyolefin.
Claim 2
Dependent Claim
76 words
A process for preparing a polyolefin composition having high adhesive strength which comprises reacting together for 30 seconds to 10 minutes (1) a crystalline polyolefin, (20 at least one unsaturated acid component selected from the group consisting of unsaturated aliphatic carboxylic acids and anhydrides thereof and (3) magnesium oxide in an amount of from 5 to 20% by weight based on the weight of the polyolefin, at a temperature above the melting point of said polyolefin.
Claim 3
Dependent Claim
34 words
The process according to claim 1, wherein said unsaturated aliphatic carboxylic acids and anhydrides thereof is present in an amount of from 0.1 to 10% by weight based on the weight of said polyolefin.
Claim 4
Dependent Claim
18 words
The process according to claim 1, wherein said reacting is at a temperature of greater than 170° C.
Claim 5
Dependent Claim
13 words
The process of claim 1, wherein said unsaturated acid component is maleic anhydride.
Claim 6
Dependent Claim
12 words
The process according to claim 1, wherein said crystalline polyolefin is polypropylene.
Claim 7
Dependent Claim
13 words
A polyolefin composition produced in accordance with the process claimed in claim 1.
Claim 8
Dependent Claim
13 words
A polyolefin composition produced in accordance with the process claimed in claim 4.
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) | 1980-06-20 | 1980-12-20 | 1981-06-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-06-20 | 1984-12-20 | 1985-06-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-06-20 | 1988-12-20 | 1989-06-21 | $7700.00 | Window Closed / Lapsed |