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US3687889A Expired / Lapsed US ⏱️ 0.0 years remaining

Process for preparing oil-extending rubber

Assignee: Bayer AG
•
Filing: 1969-07-22
•
Granted: 1972-08-29
•
Expires: 1989-07-22
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Abstract

Abstract An oil-extended polyisoprene composition which comprises A. 100 PARTS BY WEIGHT OF A SYNTHETIC CIS-1,4-POLYISOPRENE WHICH HAS BEEN PREPARED BY POLYMERIZING ISOPRENE IN SOLUTION IN A HYDROCARBON WITH AN ORGANOMETALLIC MIXED CATALYST OF TITANIUM TETRACHLORIDE, AN ALUMINUM TRIALKYL AND/OR AN ALUMINUM TRIALKYL ETHERATE AND STOPPING THE POLYMER SOLUTION CONTAINING THE MIXED CATALYST WITH AN ALIPHATIC OR CYCLOALIPHATIC DIAMINE OR POLYAMINE AND AN ALIPHATIC OR CYCLOALIPHATIC SECONDARY AMINE CONTAINING AT LEAST 10 CARBON ATOMS, OPTIONALLY IN ADMIXTURE WITH A LOWER ALIPHATIC ALCOHOL, FOLLOWED BY STABILIZATION WITH A CONVENTIONAL ANTI-AGER, AND B. FROM 15 TO 50 PARTS BY WEIGHT OF A RUBBER EXTENDING OIL AND A PROCESS FOR PRODUCING SAID MIXTURE.

Inventors

  • 👤 Josef Witte
  • 👤 Friedrich Haas
  • 👤 Gunter Marwede

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-26 14:50
CPC Classifications
C; C08; C08F; C08F136/00; C08F136/02; C08F136/04; C08F136/08; C08K; C08K5/00; C08K5/16; C08K5/17

Claims Analysis

Total Claims: 7
Claim 1
Independent Claim 36 words
The process of claim 1 wherein said secondary aliphatic or cycloaliphatic monoamine containing at least 10 carbon atoms is added to said catalyst at the same time said aliphatic or cycloaliphatic di- or polyamine is added.
Claim 2
Dependent Claim 34 words
The process of claim 1 wherein said secondary aliphatic or cycloaliphatic monoamine containing at least 10 carbon atoms is added to said catalyst after the addition of said aliphatic or cycloaliphatic di- or polyamine.
Claim 3
Dependent Claim 15 words
The process of claim 1 wherein a lower aliphatic alcohol is added in step (b).
Claim 4
Dependent Claim 52 words
The process of claim 1 wherein the di- or poly-amine is added to said catalyst as a solution in a hydrocarbon solvent, the resulting solution is washed with water and the secondary aliphatic or cycloaliphatic monoamine containing at least 10 carbon atoms is subsequently added as a solution in a hydrocarbon solvent.
Claim 5
Dependent Claim 30 words
The process of claim 1 wherein the aliphatic or cycloaliphatic di- or polyamine is 1,2-diamino ethane; 1,2-di(methylamino)-ethane; bis-(2-aminoethyl)-amine; 1,11-diamino-3, 6,9-triazodecane; 1,3-diamino propane; bis-(2-aminopropyl)-amine; 1,4-diamino butane; 1,6-diamino hexane or 1,4-diamino cyclohexane.
Claim 6
Dependent Claim 39 words
The process of claim 1 wherein said secondary aliphatic or cycloaliphatic monoamine containing at least 10 carbon atoms is di-2-ethylhexylamine, dicyclohexylamine, N-methyl stearylamine, N-methyl alkylamine wherein said alkyl moiety contains at least 10 carbon atoms or a mixture thereof.
Claim 7
Dependent Claim 21 words
The process of claim 1 wherein the secondary aliphatic or cycloaliphatic monoamine containing at least 10 carbon atoms is N-methyl stearylamine.

References Cited (Backward Citations)

US3135725A Cited
US3008944A Cited
US3139418A Cited
US3219650A Cited
US3165503A Cited
US3424736A Cited
US3386983A Cited
US3373132A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1975-08-29 1976-02-28 1976-08-29 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1979-08-29 1980-02-28 1980-08-29 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1983-08-29 1984-02-28 1984-08-29 $7700.00 Window Closed / Lapsed

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