Solidification of a natural rubber latex by polyquaternary polymers
AssigneeVersalis S.P.A.
InventorsGiacomo Gagliardi, Giovanni Regattieri, Emanuele Mazzotti
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Abstract
The present invention relates to a solidification process of the natural rubber latex by means of polyquaternary polymers. The process of the present invention has the advantage to not require the addition of acids and/or salts, with an evident saving in terms of cost for the reagents. Furthermore, in such a way neither the neutralization step of the rubber nor the treatment of the processing water before their disposal are required. The process of the present invention is suitable both for the continuous and batchwise embodiment, with evident advantages as far as its industrial application is concerned.
Claims16
A process for solidification of a natural rubber latex comprising:
- a) contacting the natural rubber latex, said natural rubber latex having a pH between 7.2 and 13 with a polyquaternary polymer, obtaining a suspension of solid natural rubber particles in a liquid phase comprising a latex serum;
- and
- b) separating the solid natural rubber particles from the liquid phase of the suspension,
- wherein the process does not require a pH adjustment of the natural rubber latex before it is in contact with said polyquarternary polymer.
Dependencies are inferred from the claim text.