Patent US3755275A successfully refreshed from Google Patents.
US3755275A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for preparing an alternate copolymer of butadiene and acrylonitrile
Assignee: Maruzen Petrochemical Co Ltd
•
Filing: 1969-08-27
•
Granted: 1973-08-28
•
Expires: 1989-08-27
Abstract
Abstract A new process for preparing an alternate copolymer of butadiene and acrylonitrile by contacting butadiene with acrylonitrile in liquid phase in the presence of the catalyst system comprising aluminum chloride, stannic chloride or zinc chloride as the first component, a vanadium compound or a chromium compound as the second component, and an organic peroxide as the third component.
Inventors
- 👤 A Kawasaki
- 👤 M Taniguchi
- 👤 T Nishiyama
- 👤 H Ueda
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 18:49
CPC Classifications
C; C08; C08F; C08F236/00; C08F236/02; C08F236/04; C08F236/12; C08F220/00; C08F220/02; C08F220/42; C08F220/44
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
11 words
A process of claim 1, wherein the vanadium compound is VOCl3.
Claim 2
Dependent Claim
38 words
A process of claim 1 wherein the vanadium compound is selected from the group consisting of acetyl acetonyl vanadium dichloride oxide, diacetyl acetonyl vanadium oxide, diacetyl acetonyl vanadium chloride oxide, diacetyl acetonyl vanadium oxide and triacetyl acetonyl vanadium.
Claim 3
Dependent Claim
11 words
A process of claim 1, wherein the chromium compound is CrO2Cl2.
Claim 4
Dependent Claim
31 words
A process of claim 1, wherein the copolymerization reaction is carried out in the presence of a diluent selected from the group consisting of hydrocarbons, chlorinated hydrocarbons and a mixture thereof.
Claim 5
Dependent Claim
29 words
A process of claim 1, wherein the molar ratio of butadiene to acrylonitrile in the initial monomer composition is within the range from 20 :80 to 80 : 20.
Claim 6
Dependent Claim
22 words
A process of claim 1, wherein the polymerization temperature is within the range of from about -70* C. to about +60* C.
Claim 7
Dependent Claim
17 words
A process of claim 3, wherein the copolymerization temperature is from about -70* C. to +40* C.
Claim 8
Dependent Claim
21 words
A process of claim 8, wherein thE molar ratio of butadiene to acrylonitrile in the initial monomer composition is about 50:50.
Claim 9
Dependent Claim
104 words
A process for preparing an alternate copolymer of butadiene and acrylonitrile by contacting first acrylonitrile and then butadiene in a non-aqueous liquid medium in the presence of a catalyst comprising a metal chloride selected from the group consisting of aluminum chloride and zinc chloride as one component, and an organic peroxide selected from the OVCl3-n(OR)n wherein n is a number 0 to 3 and R is selected from the group consisting of alkyl, aryl and cycloalkyl groups as a second component, and an organic peroxide selected from the group consisting of an alkyl peroxide, an acyl peroxide and a hydroperoxide as a third component.
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) | 1976-08-27 | 1977-02-26 | 1977-08-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-27 | 1981-02-26 | 1981-08-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-27 | 1985-02-26 | 1985-08-28 | $7700.00 | Window Closed / Lapsed |