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US 4,943,616 AGranted
Living cationic polymerization process
AssigneePolysar Limited
InventorsMunmaya K. Mishra, Akhtar Osman
Life of this patent
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AssigneePolysar Limited
InventorsMunmaya K. Mishra, Akhtar Osman
Estimating the term…
A polymerization process is provided for producing a terminally functional polymer which comprises introducing a monomer charge, a Lewis acid and an organic peroxy compound into a suitable reaction vessel and polymerizing the monomer charge at a temperature of from about 0.degree. to about -80.degree. C. to form the terminally functional polymer, wherein the monomer charge comprises isobutylene and the organic peroxy compound is charged in an amount of from about 10.sup.-4 to about 10.sup.-1 moles per mole of the isobutylene. In a preferred embodiment, the monomer charge additionally comprises vinylidene aromatic or diolefin monomers. In another preferred embodiment the monomer charge comprises the sequential addition of isobutylene and vinylidene aromatic or diolefin monomers. In a further preferred embodiment said reaction vessel is additionally charged with an electron door having an electron door number of from about 22 to about 50 the amount of said electron door being from about 10.sup.-4 to about 10.sup.-1 moles of said isobutylene. The invention also provides a novel catalyst system comprising an organic peroxy compund and a Lewis acid for the polymerization of isobutylene or monomer mixtures containing isobutylene.
A living cationic polymerization process for producing a terminally functional polymer which comprises introducing a monomer charge, a Lewis acid and an organic peroxy compound selected from the group consisting of organic peroxide, organic hydroperoxide, peroxy carbonate, azo peroxy compound and peroxy esters into a suitable reaction vessel and polymerizing the monomer charge at a temperature of from about 0 degrees to about -80 degrees centigrade to form said terminally functional polymer, wherein said monomer charge comprises the sequential addition of isobutylene and a second monomer selected from the group consisting of conjugated diolefins and vinylidene aromatic monomers and said organic peroxy compound is charged in an amount of from 10.sup.-4 to about 10.sup.-1 moles per mole of said isobutylene.
A living cationic polymerization process for producing a terminally functional polymer which comprises introducing a monomer charge, a Lewis acid, a peroxide or a hydroperoxide selected from the group consisting of 1,1,3,3-tetramethylbutyl hydroperoxide, t-butyl hydroperoxide, cumene hydroperoxide, 2,5-dimethyl-2,5-di-(t-butylperoxy)hexane, di(t-butyl) peroxide, t-butyl cumyl peroxide, di(cumyl) peroxide), t-amyl hydroperoxide, 2,5-di(hydroperoxy)-2,5-dimethyl-hexane, 3,3-dimethyl-2-methylhydroperoxybutene-1,2,7-di-(hydroperoxy)-2,7-dimethyl octane, diphenylhydroperoxymethane, benzyl hydroperoxide, p-methylhydroperoxytoluene, p-dicumyl dihydroperoxide, 1-isopropyl-3,5-dicumyl dihydroperoxide, cumylmethyl peroxide, triphenyl methyl hydroperoxide and bis-(m-2-hydroperoxy-2-propyl-alpha-cumyl) peroxide and an electron doner into a suitable reaction vessel and polymerizing the monomer charge at a temperature of from 0 degrees to about -80 degrees centigrade to form said terminally functional polymer, wherein said monomer charge comprises isobutylene, said peroxide or hydroperoxide is charged in an amount of from 10.sup.-4 to about 10.sup.-1 moles per mole of said isobutylene, and said electron donor is selected from the group consisting of electron donors having an electron donor number of from about 22 to about 50 and tetrahydrothiophene whose electron donor number is not presently known to us, the amount of said donor being from about 10.sup.-4 to about 10.sup.-1 moles per mole of isobutylene.
Dependencies are inferred from the claim text.