Use of Mercapto-Methyl Esters as Chain Transfer Agents
AssigneeArkema France
InventorsJean-Benoit Cazaux, Pascal Saint-Louis-Augustin, Georges Fremy
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Abstract
Disclosed herein is a chain transfer agent in a free-radical emulsion polymerization process, of at least one mercapto-methyl ester, and also relates to the free-radical emulsion (co)polymerization process comprising at least one such mercapto-methyl ester and uses thereof. Also disclosed herein are mercapto-methyl diesters.
Claims11
Use, as a chain transfer agent in a free-radical emulsion polymerization process, of at least one mercapto-methyl ester of a carboxylic acid, of formula (1):
- in which:
- R1 and R2, which may be identical or different, are chosen, independently of one another, from a hydrogen atom and a linear, branched or cyclic, saturated or unsaturated hydrocarbon-based radical comprising from 1 to 20 carbon atoms, and optionally substituted with one or more radicals chosen from carboxy, alkylcarbonyl and alkoxycarbonyl (where alkyl and alkoxy comprise from 1 to 10 carbon atoms);
- and
- A represents a linear, branched or cyclic, saturated or unsaturated, hydrocarbon-based divalent chain comprising from 2 to 30 carbon atoms, limits included, optionally interrupted with one or more heteroatoms chosen from oxygen, sulfur and nitrogen.
Use according to any one of the preceding claims, in which the compound of formula (1) is methyl mercaptoundecanoate or methyl mercaptodecanoate, preferably methyl mercaptodecanoate.
Compound of formula (1′):
- in which:
- R′1 represents a linear, branched or cyclic, saturated or unsaturated hydrocarbon-based radical comprising from 1 to 20 carbon atoms, substituted with one or more alkoxycarbonyl radicals, where alkoxy comprises from 1 to 10 carbon atoms;
- R′2 is chosen from a hydrogen atom and a linear, branched or cyclic, saturated or unsaturated hydrocarbon-based radical comprising from 1 to 20 carbon atoms, substituted with one or more alkoxycarbonyl radicals, where alkoxy comprises from 1 to 10 carbon atoms;
- and
- A represents a linear, branched or cyclic, saturated or unsaturated, hydrocarbon-based divalent chain comprising from 2 to 30 carbon atoms, limits included, optionally interrupted with one or more heteroatoms chosen from oxygen, sulfur and nitrogen.
Dependencies are inferred from the claim text.