US4108818A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the melt-shaping of acrylonitrile polymers
Assignee: Japan Exlan Co Ltd
•
Filing: 1976-03-02
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Granted: 1978-08-22
•
Expires: 1996-03-02
Abstract
Abstract An acrylonitrile polymer composition obtained by uniformly mixing an acrylonitrile polymer, water and acrylonitrile is heated at the autogeneous pressure or above and the resulting melt is shaped into a desired form. The shaping processability is improved thereby.
Inventors
- 👤 Kenji Odawara
- 👤 Shoichi Takeuchi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 17:15
CPC Classifications
C; C08; C08F; C08F265/00; C08F265/08; C08K; C08K5/00; C08K5/16; C08K5/29; C08K5/315
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
70 words
A process for the melt-shaping of acrylonitrile polymers, characterized in that an acrylonitrile polymer composition consisting essentially of acrylonitrile polymer, water and acrylonitrile which is obtained by uniformly mixing 30 - 90 weight percent of an acrylonitrile polymer, 1 - 56 weight percent of water and 2 - 63 weight percent of acrylonitrile is heated at the autogeneous pressure or above, and the melt is shaped into a desired form.
Claim 2
Dependent Claim
70 words
A process for the melt-shaping of acrylonitrile polymers, characterized in that an acrylonitrile polymer composition consisting essentially of acrylonitrile polymer, water and acrylonitrile which is obtained by uniformly mixing 30 - 90 weight percent of an acrylonitrile polymer, 1 - 56 weight percent of water and 2 - 63 weight percent of acrylonitrile is heated at the autogeneous pressure or above, and the melt is shaped into a desired form.
Claim 3
Dependent Claim
40 words
A process as claimed in claim 1 wherein the acrylonitrile polymer composition is obtained by mixing 50 - 85 weight percent of an acrylonitrile polymer, 2 - 32 weight percent of water and 4 - 36 weight percent of acrylonitrile.
Claim 4
Dependent Claim
35 words
A process as claimed in claim 1 wherein acrylonitrile is first dissolved or dispersed in water to obtain an aqueous material, which is then mixed with an acrylonitrile polymer, in preparing said acrylonitrile polymer composition.
Claim 5
Dependent Claim
20 words
A process as claimed in claim 1 wherein the heating is conducted at a temperature of 100° C. or higher.
Claim 6
Dependent Claim
20 words
A process as claimed in claim 4 wherein the heating is conducted at a temperature of 110° - 220° C.
Claim 7
Dependent Claim
22 words
A process as claimed in claim 1 wherein the heating is conducted at a pressure of 3 - 50 kg/cm 2 .
Claim 8
Dependent Claim
14 words
A process as claimed in claim 1 wherein filaments are shaped from the melt.
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) | 1981-08-21 | 1982-02-20 | 1982-08-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-08-21 | 1986-02-20 | 1986-08-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-08-21 | 1990-02-20 | 1990-08-22 | $7700.00 | Window Closed / Lapsed |