US 4,305,962 AGranted

Procedure for making resin-elastomer masterbatches and the product obtained

AssigneeHules Mexicanos, S.A.

InventorAbraham G. del Angel

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Abstract

Process for making elastomer-resin masterbatch using an ester gum type resin and an elastomer in latex form, process that involves the following steps: (a) fine grinding of the ester gum resin; (b) adding of the finely grinded resin to latex contained in a reactor, while maintaining a low temperature and continuous agitation of the ingredients within the reactor, in order to produce an emulsion; (c) coagulating the emulsion produced in the reactor by adding a saturated solution of sodium chloride until reaching a sodium chloride concentration in the batch between 1 to 10% and then adding sulphuric acid to complete coagulation of the batch; (d) separating the coagulated solid formed in crumbs from the liquid phase, which is discarded; (e) washing repeatedly the formed crumbs with water until obtaining the desired purity; (f) eliminating the excess water contained in the crumbs until a predetermined degree of moisture is obtained; (g) bagging of the final product for its handling and sale.

Claims7

Dependent claims

Process for making elastomer-resin masterbatch using an ester gum type resin and an elastomer in latex form, the process comprising the following steps:

(a) fine grinding of the ester gum resin;
(b) adding of the finely ground resin to latex contained in a reactor, while maintaining a temperature from about 3.degree. to 35.degree. C. and continuous agitation of the ingredients within the reactor, in order to produce an emulsion;
(c) coagulating the emulsion produced in the reactor by adding a saturated solution of sodium chloride until reaching a sodium chloride concentration in the batch between 1 to 10% and then adding dilute sulphuric acid in an amount effective to neutralize the batch to complete coagulation of the batch;
(d) separating the coagulated solid formed in crumbs from the liquid phase, which is discarded;
(e) repeatedly washing the formed crumbs with water until obtaining the desired purity;
(f) eliminating the excess water contained in the crumbs until a moisture content from about 3% to about 10% is obtained;
(g) bagging of the final product for its handling and sale.

4 more elements

Dependencies are inferred from the claim text.