Patent US3856877A successfully refreshed from Google Patents.
US3856877A
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US
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Method for isomerization of lower polymers of butadiene
Assignee: Eneos Corp
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Filing: 1973-11-12
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Granted: 1974-12-24
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Expires: 1993-11-12
Abstract
Abstract A method for isomerization of lower polymers and copolymers of butadiene which is characterized in that the nonconjugated double bonds in said polymers and copolymers can be isomerized to conjugated double bonds by treating said polymer and copolymers at a temperature of 0 to 200*C in the presence of a catalyst comprising a dispersion of alkali metal and a diamine compound having active hydrogen, thereby polymers or copolymers with high reactivity and useful as paint vehicles, thermosetting materials, adhesives, rubber compounding materials and intermediates for various synthetic reactions, can be obtained.
Inventors
- 👤 Y Otsuki
- 👤 H Horii
- 👤 H Imai
- 👤 A Kaiya
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 13:54
CPC Classifications
C; C08; C08C; C08C19/00; C08C19/10; Y; Y10; Y10S; Y10S585/00; Y10S585/929; Y10S585/945
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
99 words
A METHOD FOR THE ISOMERIZATION OF A LOWER POLYMER OF BUTADIENE OR LOWER COPOLYMER OF BUTADIENE AND AT LEAST ONE MEMBER SELECTED FROM THE GROUP CONSISTING OF A CONJUGATED DIOLEFIN AND A VINYL-SUBSTITUTED AROMATIC COMPOUND, WHICH IS CHARACTERIZED IN THAT THE NON-CONJUGATED DOUBLE BONDS IN SAID POLYMERS AND COPOLYMERS ARE ISOMERIZED TO CONJUGATED DOUBLE BONDS BY TREATING SAID POLYMERS AND COPOLYMERS AT A TEMPERATURE OF 0* TO 200*C. IN THE PRESENCE OF A CATALYST COMPRISING: A DISPERSION OF AN ALKALI METAL SELECTED FROM THE GROUP CONSISTING LITHIUM, SODIUM AND POTASSIUM, AND A DIAMINE COMPOUND REPRESENTED BY THE GENERAL FORMULA:
Claim 2
Independent Claim
99 words
A METHOD FOR THE ISOMERIZATION OF A LOWER POLYMER OF BUTADIENE OR LOWER COPOLYMER OF BUTADIENE AND AT LEAST ONE MEMBER SELECTED FROM THE GROUP CONSISTING OF A CONJUGATED DIOLEFIN AND A VINYL-SUBSTITUTED AROMATIC COMPOUND, WHICH IS CHARACTERIZED IN THAT THE NON-CONJUGATED DOUBLE BONDS IN SAID POLYMERS AND COPOLYMERS ARE ISOMERIZED TO CONJUGATED DOUBLE BONDS BY TREATING SAID POLYMERS AND COPOLYMERS AT A TEMPERATURE OF 0* TO 200*C. IN THE PRESENCE OF A CATALYST COMPRISING: A DISPERSION OF AN ALKALI METAL SELECTED FROM THE GROUP CONSISTING LITHIUM, SODIUM AND POTASSIUM, AND A DIAMINE COMPOUND REPRESENTED BY THE GENERAL FORMULA:
Claim 3
Dependent Claim
33 words
A method for isomerization as claimed in claim 1, wherein said lower polymer or copolymer of butadiene is liquid or semi-solid at room temperature and has a molecular weight of 300 to 10,000.
Claim 4
Dependent Claim
51 words
A method for isomerization as claimed in claim 1, wherein said lower copolymer of butadiene is a copolymer of butadiene with aa comonomer selected from the group consisting of isoprene, 2,3-dimethylbutadiene, piperylene, styrene, Alpha -methylstyrene, vinyl toluene and divinylbenzene, and the content of said comonomer being 50 mole percent or less.
Claim 5
Dependent Claim
25 words
A method for isomerization as claimed in claim 1, wherein said treatment is carried out in a solvent selected from aliphatic hydrocarbons and aromatic hydrocabons.
Claim 6
Dependent Claim
36 words
a method for isomerization as claimed in claim 1, wherein said diamine compound is a member selected from the group consisting of ethylene diamine, N,N''-dimethyl ethylene diamine, N,N''-diethyl ethylene diamine, propylene diamine and N,N''-dimethyl propylene diamine.
Claim 7
Dependent Claim
23 words
A method for isomerization as claimed in claim 1, wherein said diamine compound is a polyethylene polyamine represented by the following general formula:
Claim 8
Dependent Claim
31 words
A method for isomerization as claimed in claim 6, wherein said polyethylene polyamine is a member selected from the group consisting of diethylene triamine, diemthyl diethylene triamine and dimethyl triethylene tetramine.
Claim 9
Dependent Claim
16 words
A method for isomerization as claimed in claim 1, wherein said diamine compound is cyclic diamine.
Claim 10
Dependent Claim
35 words
A method for isomerization as claimed in claim 1, wherein said alkali metal dispersion is used in an amount of 1 millimole to 1 mole per 100 grams of said polymer or copolymer of butadiene.
Claim 11
Dependent Claim
34 words
A method for isomerization as claimed in claim 1, wherein said alkali metal dispersion is used in an amount of 10 to 100 millimoles per 100 grams of said polymer of copolymer of butadiene.
Claim 12
Dependent Claim
29 words
A method for isomerization as claimed in claim 1, wherein said diamine compound is used in an amount of 0.1 to 100 mole equivalents to said alkali metal dispersion.
Claim 13
Dependent Claim
29 words
A method for isomerization as claimed in claim 11, wherein said diamine compound is used in an amount Of 0.5 to 10 mole equivalents to said alkali metal dispersion.
Claim 14
Dependent Claim
22 words
A method for isomerization as claimed in claim 1, wherein said treatment is carried out at a temperature of 30* to 150*C.
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) | 1977-12-23 | 1978-06-24 | 1978-12-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-12-23 | 1982-06-24 | 1982-12-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-12-23 | 1986-06-24 | 1986-12-24 | $7700.00 | Window Closed / Lapsed |