Patent ID: 7638467

Claim:
A reversible gelling system, comprising: a polymer, wherein the polymer is a copolymer of styrene-butadiene; a crosslinker, wherein the crosslinker is selected from the group consisting of di-tert-butylperoxide, dicumyl peroxide and combinations thereof; a gel accelerator; and an oxidant, wherein the oxidant is selected from the group consisting of cumyl hydroperoxide, tert-butyl hydroperoxide and combinations thereof; wherein temperature activates the crosslinker so as to cause the system to form a gel, and the oxidant subsequently decomposes the gel, and wherein the polymer, crosslinker, gel accelerator and oxidant are present in the system in amounts as follows: polymer between about 2 and about 4% wt.; crosslinker between about 2.00 and about 4.00% wt.; gel accelerator between about 0.10 and about 1.00% wt.; and oxidant between about 0.30 and about 1.50% wt.