Process of free-radical polymerization or crosslinking in the presence of a selected organic peroxide prepared by an ex situ process
AssigneeArkema France
InventorsSandra Grimaldi, Jean-Marc Corpart
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Abstract
The invention relates to free-radical polymerization and free-radical cross-linking and more particularly provides a process of free-radical polymerization or cross-linking wherein at least one polymerizable monomer or at least one compound to be cross-linked is contacted in the presence of at least one selected organic peroxides, characterized in that the organic peroxide is prepared continuously by an ex situ process with the aid of a closed plate exchanger. In the process according to the invention, it's possible to introduce the above selected organic peroxide continuously during the polymerization or cross-linking reaction.
Claims15
Process of free-radical polymerization or cross-linking wherein at least one polymerizable monomer or at least one compound to be cross-linked is contacted in the presence of at least one organic peroxide selected from the group consisting of di(n-propyl) peroxydicarbonate, di(sec-butyl) peroxydicarbonate, di(2-ethylhexyl) peroxydicarbonate, 1,1-dimethyl-3-hydroxybutyl peroxyneodecanoate, α-cumyl peroxyneodecanoate, α-cumyl peroxyneoheptanoate, tert-amyl peroxyneodecanoate, tert-butyl peroxyneodecanoate, tert-amyl peroxypivalate, tert-butyl peroxypivalate, 2,5-dimethyl-2,5-di(2-ethylhexanoylperoxy)hexane, tert-amyl peroxy-2-ethylhexanoate, tert-butyl peroxy-2-ethylhexanoate, tert-amyl peroxyacetate, tert-butyl peroxyacetate, tert-amyl perbenzoate, tert-butyl perbenzoate, OO-tert-amyl-O(2-ethylhexyl) monoperoxycarbonate, OO-tert-butyl-O-isopropyl monoperoxycarbonate, OO-tert-butyl 1-(2-ethylhexyl) monoperoxycarbonate, poly(tert-butyl peroxycarbonate) polyether, decanoyl peroxide, lauroyl peroxide, succinic acid peroxide, benzoyl peroxide, 1,1-di(tert-butylperoxy)-3,3,5-trimethylcyclohexane, 1,1-di(tert-butylperoxy)cyclohexane, 1,1-di(tert-amylperoxy)cyclohexane, n-butyl 4,4-di(tert-butylperoxy)valerate, ethyl 3,3-di(tert-amylperoxy)butyrate, tert-butyl peroctoate, ethyl 3,3-di(tert-butylperoxy)butyrate, cumene hydroperoxide, and tert-butyl hydroperoxide, and mixtures thereof, characterized in that the organic peroxide is prepared continuously by an ex situ process with the aid of a closed plate exchanger.
Process of suspension polymerization with vinyl chloride in the presence of at least one organic peroxide selected from the group consisting of di(n-propyl) peroxydicarbonate, di(sec-butyl) peroxydicarbonate, di(2-ethylhexyl) peroxydicarbonate, 1,1-dimethyl-3-hydroxybutyl peroxyneodecanoate, α-cumyl peroxyneodecanoate, α-cumyl peroxyneoheptanoate, tert-amyl peroxyneodecanoate, tert-butyl peroxyneodecanoate, tert-amyl peroxypivalate, tert-butyl peroxypivalate, characterized in that the organic peroxide is prepared continuously by an ex situ process in a closed plate exchanger.
Process of suspension polymerization of styrene in the presence of at least one organic peroxide selected from the group consisting of 2,5-dimethyl-2,5-di(2-ethylhexanoylperoxy)hexane, tert-butyl peroxy-2-ethylhexanoate, tert-amyl perbenzoate, tert-butyl perbenzoate, OO-tert-amyl-O(2-ethylhexyl) monoperoxycarbonate, OO-tert-butyl-O-isopropyl monoperoxycarbonate, OO-tert-butyl 1-(2-ethylhexyl) monoperoxycarbonate, poly(tert-butyl peroxycarbonate) polyether, decanoyl peroxide, lauroyl peroxide, succinic acid peroxide, 1,1-di(tert-butylperoxy)-3,3,5-trimethylcyclohexane, characterized in that the peroxide is prepared continuously by an ex situ process in a closed plate exchanger.
Process of polymerization of acrylic monomers in the presence of at least one organic peroxide selected from the group consisting of 2,5-dimethyl-2,5-di(2-ethylhexanoylperoxy)hexane, tert-amyl peroxy-2-ethylhexanoate, tert-butyl peroxy-2-ethylhexanoate, tert-amyl peroxyacetate, tert-butyl peroxyacetate, tert-amyl perbenzoate, characterized in that the peroxide is prepared continuously by an ex situ process in a closed plate exchanger.
Process of free-radical polymerization or cross-linking, wherein a polymerizable monomer or a compound to be cross-linked is contacted in the presence of at least one organic peroxide selected from the group consisting of di(n-propyl) peroxydicarbonate, di(sec-butyl) peroxydicarbonate, di(2-ethylhexyl) peroxydicarbonate, 1,1-dimethyl-3-hydroxybutyl peroxyneodecanoate, α-cumyl peroxyneodecanoate, α-cumyl peroxyneoheptanoate, tert-amyl peroxyneodecanoate, tert-butyl peroxyneodecanoate, tert-amyl peroxypivalate, tert-butyl peroxypivalate, 2,5-dimethyl-2,5-di(2-ethylhexanoylperoxy)hexane, tert-amyl peroxy-2-ethylhexanoate, tert-butyl peroxy-2-ethylhexanoate, tert-amyl peroxyacetate, tert-butyl peroxyacetate, tert-amyl perbenzoate, tert- butyl perbenzoate, OO-tert-amyl-O(2-ethylhexyl) monoperoxycarbonate, OO-tert-butyl-O-isopropyl monoperoxycarbonate, OO-tert-butyl 1-(2-ethylhexyl) monoperoxycarbonate, poly(tert-butyl peroxycarbonate) polyether, decanoyl peroxide, lauroyl peroxide, succinic acid peroxide, benzoyl peroxide, 1,l-di(tert-butylperoxy)-3,3,5-trimethylcyclohexane, 1,1-di(tert-butylperoxy)cyclohexane, 1,1-di(tert-amylperoxy)cyclohexane, n-butyl 4,4-di(tert-butylperoxy)valerate, ethyl 3,3-di(tert-amylperoxy)butyrate, tert-butyl peroctoate, ethyl 3,3-di(tert-butylperoxy)butyrate, cumene hydroperoxide, and tert-butyl hydroperoxide, and mixtures thereof, said process comprising:
- preparing a selected organic peroxide continuously in a closed plate exchanger,
- optionally transferring the organic peroxide from (a) to a purification unit,
- optionally transferring the organic peroxide obtained in step (a) or in step (b) to a polymerization or cross-linking reactor, and
- free-radical polymerizing or cross-linking at least one polymerizable monomer or of at least one compound to be cross-linked, in the presence of one or more organic peroxides transferred in step (c).
Dependencies are inferred from the claim text.