Stabilized aqueous polymer compositions and their use
AssigneeTouGas Oilfield Solutions GmbH
InventorsFriedrich Engelhardt, Werner Spielmann, Christian Bremer, Anja Obermüller, Joachim Christian
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Abstract
Disclosed are stabilized aqueous polymer compositions containing A) a stabilizing amount of a least a sulfur dye or containing a stabilizing amount of a sulfur dye with a compound comprising a heterocyclic system containing nitrogen and sulphur as ring heteroatoms and B) at least one polymer comprising groups which are capable of complex formation with ions. The aqueous polymer compositions are stabilized against thermal or other degradation processes of the polymer by addition of component A) to allow their use even under harsh conditions.
Claims19
A stabilized aqueous polymer composition containing:
- A) a stabilizing amount of at least a sulfur dye;
- and
- B) at least one polymer comprising groups which are capable of complex formation with ions.
A method of stabilizing an aqueous polymer system against thermal degradation comprising:
- (a) preparing an aqueous polymer composition comprising a polymer with groups capable of complex formation with ions;
- and
- (b) stabilizing the aqueous composition with a sulfur dye or a combination of at least one sulfur dye and another heteroyclic system containing nitrogen and sulfur ring heteroatoms.
Dependencies are inferred from the claim text.