GB1005988A - Polymerization process and product - Google Patents

Polymerization process and product

Info

Publication number
GB1005988A
GB1005988A GB3750363A GB3750363A GB1005988A GB 1005988 A GB1005988 A GB 1005988A GB 3750363 A GB3750363 A GB 3750363A GB 3750363 A GB3750363 A GB 3750363A GB 1005988 A GB1005988 A GB 1005988A
Authority
GB
United Kingdom
Prior art keywords
solvent
mixed solvent
content
methanol
polymer
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB3750363A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Goodyear Tire and Rubber Co
Original Assignee
Goodyear Tire and Rubber Co
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Goodyear Tire and Rubber Co filed Critical Goodyear Tire and Rubber Co
Publication of GB1005988A publication Critical patent/GB1005988A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
    • C08F36/00—Homopolymers and copolymers of compounds having one or more unsaturated aliphatic radicals, at least one having two or more carbon-to-carbon double bonds
    • C08F36/02—Homopolymers and copolymers of compounds having one or more unsaturated aliphatic radicals, at least one having two or more carbon-to-carbon double bonds the radical having only two carbon-to-carbon double bonds
    • C08F36/04—Homopolymers and copolymers of compounds having one or more unsaturated aliphatic radicals, at least one having two or more carbon-to-carbon double bonds the radical having only two carbon-to-carbon double bonds conjugated

Landscapes

  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)

Abstract

Rubbery polymers are made by polymerizing in a hydrocarbon solvent conjugated dienes containing 4 to 8 carbon atoms in the presence of an organometallic catalyst, preferably of the Ziegler-type, to first form a mix containing at least 6.5% polymer and then, by maintaining in the polymerization mix a monomer concentration of 0.5 to 29%, a solvent concentration of 92 to 39%, and removing heat from the polymerizate to maintain a temperature in the range of 0 DEG to 90 DEG C., continuing the polymerization until a polymer solution containing at least 10% of polymer is obtained. The heat removal may be effected by a partial evaporation of solvent. The solvent may comprise 1 to 20% of an extender oil. The diene may be butadiene, isoprene, pentadienes, hexadienes or heptadienes. The Specification includes a flow diagram of a continuous method for carrying the process into effect. Exemplified dienes are butadiene and isoprene. Exemplified catalysts are aluminium triisobutyl and TiI4, aluminium triisobutyl and TiCl4 and I2, aluminium trisobutyl diphenyl etherate and TiCl4, and tetramethylene dilithium. Polybutadiene prepared by the process has the following properties: (1) at least 80% cis content; (2) an inherent viscosity of 1.7 to 3.5 at 30 DEG C.; (3) less than 5% gel content; (4) a cold flow at 50 DEG C. of less than one milligram per minute; and (5) a solubility at 25 DEG C. on a weight per cent basis in a mixed solvent consisting of benzene and methanol of not more than 60 when the methanol content of the mixed solvent is 18%, not more than 40 when the methanol content of the mixed solvent is 19%, and not more than 20 when the methanol content of the mixed solvent is 20%.
GB3750363A 1962-10-22 1963-09-24 Polymerization process and product Expired GB1005988A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US23195762A 1962-10-22 1962-10-22

Publications (1)

Publication Number Publication Date
GB1005988A true GB1005988A (en) 1965-09-29

Family

ID=22871322

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3750363A Expired GB1005988A (en) 1962-10-22 1963-09-24 Polymerization process and product

Country Status (4)

Country Link
BE (1) BE638820A (en)
GB (1) GB1005988A (en)
LU (1) LU44654A1 (en)
NL (1) NL299571A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2554558A1 (en) * 2011-08-02 2013-02-06 Lanxess Deutschland GmbH Method for producing nitrile rubbers in organic solvents

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2554558A1 (en) * 2011-08-02 2013-02-06 Lanxess Deutschland GmbH Method for producing nitrile rubbers in organic solvents
WO2013017610A1 (en) 2011-08-02 2013-02-07 Lanxess Deutschland Gmbh Process for producing nitrile rubbers in organic solvents
CN104185645A (en) * 2011-08-02 2014-12-03 朗盛德国有限责任公司 Process for producing nitrile rubbers in organic solvents

Also Published As

Publication number Publication date
BE638820A (en)
NL299571A (en)
LU44654A1 (en) 1963-12-18

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