Process for the instantaneous peptization of polychloroprene latex
AssigneeDistugil
InventorsPaul Branlard, Jacques Modiano
Life of this patent
Estimating the term…
Abstract
A process for instantaneous peptization of polychloroprene latexes made by polymerizing in the presence of sulfur and a modifying agent such as iodoform or a dialkylxanthogen disulfide, by adding a suitable thiol at a pH at least equal to 9.
Claims12
A process for the instantaneous peptisation of polychloroprene latexes, comprising polymerizing the chloroprene monomer in the presence of sulfur and a modifying agent selected from the group consisting of iodoform and the dialkylxanthogen disulphides, and peptizing the latexes at a pH at least equal to 9, by adding a thiol of the general formula R--SH or its ionized sulfenyl form RS.sup.-ME.sup.+, Me being an alkali cation or ammonium, in which R is:
- an alkyl group containing from 2 to 16 carbon atoms, the chain of which is straight or branched, or a mixture of different alkyl groups;
- an aryl or alkylaryl group;
- an arylcarbonyl group;
- an alkylcarboxy group;
- an alkylnaphthyl or naphthyl group;
- an arylthiazole or thiazole group or its sodium salt;
- an arylimidazole or imidazole group;
- or
- an alkylxanthate group.
Dependencies are inferred from the claim text.