Stabilized aqueous polymer compositions
AssigneeAllessa Chemie GmbH
InventorsFriedrich Engelhardt, Christian Bremer, Anja Obermüller, Joachim Christian
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Abstract
The aqueous polymer composition comprises a water soluble polymer having a molar weight of at least 104 Daltons and comprising functional groups which may form complexes with metal ions. The aqueous polymer compositions of this invention are stabilized against thermal or other degradation processes by addition of a phenothiazine compound to allow their use even under harsh conditions.
Claims37
A stabilized aqueous polymer composition containing:
- A) a stabilizing amount of at least one phenothiazine compound present in an amount between 80 ppm and 5% by weight and
- B) at least one solvatable polysaccharide polymer with a weight average molecular weight of at least 104 Daltons comprising groups which are capable of complex formation with ions.
A stabilized aqueous polymer composition containing:
- A) a stabilizing amount of between 80 ppm and 5% by weight of at least one phenothiazine compound:
- and
- B) at least one polymer with a weight average molecular weight of at least 104 Daltons comprising groups which are capable of complex formation with ions, said polymer being selected from the group consisting of:
- (i) a galactomannan gum, (ii) a glucomannan gum and a cellulose derivative, (iii) a guar gum, (iv) a guar gum derivative, (v) a galactomannan gum, (vi) a glucomannan gum, and (vii) a xanthan gum.
A stabilized aqueous polymer composition containing:
- A) a stabilizing amount of between 80 ppm and 5% by weight of at least one phenothiazine compound and
- B) at least one polymer with a weight average molecular weight of at least 104 Daltons comprising groups which are capable of complex formation with ions, each said polymer being selected from the group consisting of:
- (i) a galactomannan gum,
- (ii) a glucomannan gum and a cellulose derivative,
- (iii) a guar gum,
- (iv) a guar gum derivative chosen from the group consisting of:
- (a) hydroxyalkyl guar,
- (b) carboxyalkyl guar,
- (c) carboxyalkyl hydroxyalkyl guar, and
- (d) hydrophobically modified guar,
- (v) a galactomannan gum,
- (vi) a glucomannan gum, and
- (vii) a xanthan gum.
A stabilized aqueous polymer composition containing:
- A) a stabilizing amount of between 80 ppm and 5% by weight of at least one phenothiazine compound and
- B) at least one guar gum derivative with a weight average molecular weight of at least 104 Daltons comprising groups which are capable of complex formation with ions, each said guar gum derivative being selected from the group consisting of:
- (a) hydroxyalkyl guar,
- (b) carboxyalkyl guar,
- (c) carboxyalkyl hydroxyalkyl guar, and
- (d) hydrophobically modified guar.
A stabilized aqueous polymer composition containing:
- A) a stabilizing amount of at least 10 ppm of at least one phenothiazine compound;
- and
- B) at least one synthetic polymer with a molecular weight of at least 104 Daltons comprising groups which are capable of complex formation with ions;
- each said synthetic polymer being a copolymer derived by copolymerization of
- (a) least one amide of an ethylenically unsaturated carboxylic acid;
- (b) at least one ethylenically unsaturated phosphonic acid;
- (c) at least one ethylenically unsaturated sulfonic acid;
- and optionally
- (d) at least one ethylenically unsaturated carboxylic acid;
- and optionally
- (d) at least one additional copolymerizable monomer.
A gelled polymer obtained by crosslinking an aqueous polymer solution obtained by diluting with water a water in oil polymer emulsion containing:
- A) a stabilizing amount of at least 10 ppm of at least one phenothiazine compound, and
- B) a polymer with a weight average molecular weight of at least 104 Daltons comprising groups which are capable of complex formation with ions;
- and by adding crosslinking ions to said aqueous polymer solution.
A solid formulation containing:
- A) a stabilizing amount of at least 10 ppm of at least one phenothiazine compound, and
- B) a polymer with a weight average molecular weight of at least 104 Daltons comprising groups which are capable of complex formation with ions
- in particulate solid form.
A stabilized aqueous polymer composition containing:
- A) a stabilizing amount of at least 10 ppm of at least one phenothiazine compound and
- B) at least one polymer with a weight average molecular weight of at least 104 Daltons comprising groups which are capable of complex formation with ions.
A water in oil polymer emulsion containing:
- A) a stabilizing amount of at least 10 ppm of at least one phenothiazine compound, and
- B) a polymer with a weight average molecular weight of at least 104 Daltons comprising groups which are capable of complex formation with ions.
A dispersion containing a non-aqueous fluid having suspended or dispersed therein
- A) a stabilizing amount of at least 10 ppm of at least one phenothiazine compound, and
- B) a polymer with a weight average molecular weight of at least 104 Daltons comprising groups which are capable of complex formation with ions.
A method of stabilizing a polymer admixture chosen from the group consisting of aqueous polymer solutions and water in oil polymer emulsions, said admixture containing a polymer containing groups which are capable of complex formation with ions, said polymer having a weight average molecular weight of at least 104 Dalton which method comprises adding a stabilizing amount of at least 10 ppm of at least one phenothiazine compound to said aqueous polymer solution or to said water in oil polymer emulsion to result in a stabilization against thermal degradation of said polymer.
Dependencies are inferred from the claim text.