EP0754198A1 - Procede de polymerisation anionique de monomeres acryliques - Google Patents

Procede de polymerisation anionique de monomeres acryliques

Info

Publication number
EP0754198A1
EP0754198A1 EP96905350A EP96905350A EP0754198A1 EP 0754198 A1 EP0754198 A1 EP 0754198A1 EP 96905350 A EP96905350 A EP 96905350A EP 96905350 A EP96905350 A EP 96905350A EP 0754198 A1 EP0754198 A1 EP 0754198A1
Authority
EP
European Patent Office
Prior art keywords
process according
acrylic
methacrylate
acrylate
methacrylic
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.)
Withdrawn
Application number
EP96905350A
Other languages
German (de)
English (en)
Inventor
Munmaya Kumar Mishra
Shailaja Madhusudhan Shirodkar
Alfred Karl Jung
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.)
Texaco Development Corp
Original Assignee
Texaco Development Corp
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 Texaco Development Corp filed Critical Texaco Development Corp
Publication of EP0754198A1 publication Critical patent/EP0754198A1/fr
Withdrawn legal-status Critical Current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
    • C08F20/00—Homopolymers and copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical or a salt, anhydride, ester, amide, imide or nitrile thereof
    • C08F20/02—Monocarboxylic acids having less than ten carbon atoms, Derivatives thereof
    • C08F20/10—Esters
    • C08F20/12—Esters of monohydric alcohols or phenols
    • 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
    • C08F2/00—Processes of polymerisation
    • C08F2/04—Polymerisation in solution
    • C08F2/06—Organic solvent

Definitions

  • the invention relates to the polymerization of acrylic monomers, optionally using vinyl comonomers in the presence of an anionic initiator to form polymers or copolymers having a narrow molecular weight distribution.
  • R - M in which denotes an alkali metal or an alkaline earth metal and R denotes a straight-chain or branched alkyl containing 2 to 6 carbon atoms or an aryl have been employed.
  • initiators include sec- butyllithium, naphthalenesodium, 1,4-disodio-l,1,4,4- tetraphenyl butane, diphenylmethyl potassium, diphenylmethyl sodium, 1 ' -methylstyryllithium, 1,1- diphenyl-3-methylpentyllithium and others such as tertiary alcoholates of lithium and compounds containing trimethylsilyl groups.
  • the present invention relates to an improved process for the anionic polymerization or copolymerizatio of acrylates and methacrylates wherein the monomers and comonomers are added to the anionic polymerization reaction medium either at once or in very fast continuous manner. More specifically, the instant process comprises the steps of preparing an anionic polymerization initiation system and adding the monomers to be polymerized or copolymerized to the initiation system either at once or in a rapid continuous manner.
  • the present invention relates to the anionic polymerization of acrylate and methacrylate monomers optionally with vinyl comonomers.
  • Acrylic and methacrylic monomers which are polymerized in the present invention include acrylic acid, acrylic acid esters, acrylonitriles, acrylamides, methacrylic acid, methacrylic acid esters, methacrylonitriles, and methacrylamide.
  • the preferred acrylic and methacrylic monomers are alkyl acrylates or alkyl methacrylates wherein the alkyl group contains from 1 to 18 carbon atoms.
  • the alkyl radical can be either unsubstituted or substituted.
  • acrylates and methacrylates include methylacrylate, methyl methacrylate, ethyl acrylate, ethyl methacrylate, butyl acrylate, butylmethacrylate, isobutyl acrylate, isobutyl methacrylate, tert-butyl acrylate, tert-butyl methacrylate, propyl methacrylate, 2-ethylhexyl acrylate, 2-ethylhexyl methacrylate, hexyl acrylate, hexyl methacrylate, isopropyl methacrylate, lauryl acrylate, lauryl methacrylate, stearyl acrylate and stearyl methacrylate.
  • Vinyl comonomers include, for example, butadiene, isoprene, styrene, alpha methyl styrene, vinyl toluene, t-butyl styrene, chlorostyrene, vinylnaphthalene, 2-vinylpyridine, 4-vinylpyridine and the like.
  • Initiators useful in the present invention include initiators of the formula:
  • R - M in which M is an alkali metal or an alkaline earth metal and R is a straight-chain or branched alkyl or cyclo-alkyl preferably having from 1 to 6 carbon atoms or an aryl.
  • initiators include, for example, hydrocarbyllithium initiators such as alkyllithium compounds, preferably methyl lithium, n-butyllithium, sec- butyllithium, cycloalkyllithium compounds, preferably, cyclohexyllithium and aryllithium compounds, preferably, phenyllithium, 1-methylstyryllithium, p-tolyllithium, naphyllithium and 1,l-diphenyl-3- methylpentyllithium.
  • Also useful initiators include, naphthalene sodium, 1,4-disodio-l,1.4,4-tetraphenylbutane diphenylmethyl-potassium and diphenylmethylsodium.
  • Tertiary alcoholates of lithium and compounds containing trimethylsilyl groups may also be employed.
  • the instant process is preferably carried out i the absence of moisture and oxygen and in the presence of at least one inert solvent.
  • the polymerization is conducted in the absence of any impurit which is detrimental to an anionic catalyst systems.
  • the inert solvent is preferably a hydrocarbon, an aromatic solvent or an ether.
  • Suitable solvents include isobutane, pentane, cyclohexane, benzene, toluene, xylene, tetrahydrofuran, diglyme, tetraglyme, orthoterphenyl, biphenyl, decalin or tetralin.
  • the polymerization or copolymerization temperature useful in the present process varies between about 30°C and about -78°C, preferably between about 0°C and -78°C.
  • the present process preferably employs 1,1- diphenylethylene in the initiator system for the anionic polymerization.
  • 1,1-diphenylethylene has relatively high electro-affinity and does not homopolymerize.
  • the instant process enables the preparation of a whole range of homopolymers and copolymers including block copolymers wherein the number average molecular weight range of about 500 to about 1,000,000 preferably from about 1,000 to about 500,000, most preferably from about 1,000 to about 200,000 (number average m.w.) and a polydispersity index of about 1.0 to about 2.0, preferably from about 1.0 to about 1.5.
  • the polymers and copolymers prepared in the present process have various known uses including, for example as lubricant additives.
  • the polymerization is generally carried out in an inert atmosphere, for example under a nitrogen, argon, etc. atmosphere.
  • Equipment used in the polymerization reaction should be carefully dried such as by drying at about 150°C for several hours. Solvents and reagents are also carefully dried.
  • THF tetrahydrofuran
  • the THF can be freshly distilled over sodium-benzophenone (from a characteristic purple color) .
  • Acrylic or methacrylic or other monomers or comonomers can be purified by passing the monomer or comonomer through neutral alumina.
  • Diphenyl ethylene (DPE) can be dried over molecular sieve.
  • the metallic initiators are normally used as received.
  • the polymerization system was titrated wit sec. butyllithium to a red endpoint (process for cleaning the impurities) ;

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)
  • Polymerization Catalysts (AREA)
  • Polymerisation Methods In General (AREA)

Abstract

Un polymère ou un copolymère ayant une faible polydispersivité est formé par un procédé de polymérisation anionique. Le procédé comprend les étapes suivantes: formation d'un milieu initiateur de polymérisation; addition rapide d'un monomère acrylique ou méthacrylique au milieu initiateur de la polymérisation; et polymérisation du monomère acrylique ou méthacrylique afin de former le polymère ou le copolymère ayant une faible polydispersivité.
EP96905350A 1995-01-27 1996-01-22 Procede de polymerisation anionique de monomeres acryliques Withdrawn EP0754198A1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US37897895A 1995-01-27 1995-01-27
US378978 1995-01-27
PCT/US1996/001468 WO1996023008A2 (fr) 1995-01-27 1996-01-22 Procede de polymerisation anionique de monomeres acryliques

Publications (1)

Publication Number Publication Date
EP0754198A1 true EP0754198A1 (fr) 1997-01-22

Family

ID=23495327

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96905350A Withdrawn EP0754198A1 (fr) 1995-01-27 1996-01-22 Procede de polymerisation anionique de monomeres acryliques

Country Status (4)

Country Link
EP (1) EP0754198A1 (fr)
JP (1) JPH09511785A (fr)
AU (1) AU4913796A (fr)
WO (1) WO1996023008A2 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5834408A (en) * 1997-10-24 1998-11-10 Ethyl Corporation Pour point depressants via anionic polymerization of (meth)acrylic monomers
US6013735A (en) * 1998-02-13 2000-01-11 Ethyl Corporation Process for the preparation of acrylate and methacrylate polymers
EP3640267A4 (fr) * 2017-07-14 2020-05-13 LG Chem, Ltd. Procédé de préparation d'un polymère

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB836736A (en) * 1957-03-20 1960-06-09 Ici Ltd Polymerisation process
DE69018517T2 (de) * 1989-06-05 1996-01-11 Elf Atochem S.A., Puteaux, Hauts-De-Seine Verfahren und anionische Polymerisationskatalysatoren für Acrylatmonomere.

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9623008A2 *

Also Published As

Publication number Publication date
WO1996023008A3 (fr) 1997-02-13
AU4913796A (en) 1996-08-14
JPH09511785A (ja) 1997-11-25
WO1996023008A2 (fr) 1996-08-01

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