Additives for water for fire protection
AssigneeEvonik Stockhausen GmbH
InventorsJochen Houben, Erich Küster, Martin Tennie
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Abstract
The current invention relates to water-swellable polymers at least partially comprised of sulfonic acid group containing monomers as additives for fire extinguishing water, which exhibits an elevated NaCl content, used in fire prevention and to combat fire.
Claims69
A method of using water-swellable polymers in fire prevention or fire fighting comprising:
- (i) adding a salt containing water having common salt (NaCl) as the largest saline moiety and between about 2 and 28 weight-% total salt content and a quantity of an additive comprising a water-swellable polymer at least partially based on at least one sulfonic acid group containing unsaturated monomer to make a fire extinguishing water composition, the water-swellable polymer comprising at least:
- (a) between about 50 and 70 mol-% of at least one sulfonic acid group containing monomer,
- (b) between about 10 and 60 mol-% of at least one nonionic monomer selected from any one of methacrylamide, n-alkyl-substituted acrylamide, 2-hydroxyethylacrlate, 2-hydroxyethylmethacrylate, hydroxypropylacrylate, hydroxypropylmethacrylate, C1-C4 alkyl(meth)acrylate, vinyl acetate, acrylamide, or combinations thereof, and
- (c) between about 0.1 to 3 mol-% of at least one cross-linking agent;
- and
- (ii) applying the fire extinguishing water composition to a surface for fire protection or fire fighting,
- wherein the quantity of the additive used in the fire extinguishing water composition is an amount that provides an amount of electrolyte sufficient to raise a viscosity of the fire extinguishing water composition to over about 1000 mPas.
An additive comprising a water-swellable polymer for making a fire extinguishing water based composition using a salt containing water having common salt (NaCl) as the largest saline moiety and between about 2 and 28 weight-% total salt content, the water-swellable polymer comprising:
- (a) between about 50 and 70 mol-% of at least one unsaturated sulfonic acid group containing monomer;
- (b) between about 25 and 60 mol-% of at least one nonionic monomer selected from any one of methacrylamide, n-alkyl-substituted acrylamide, 2-hydroxyethylacrlate, 2-hydroxyethyl methacrylate, hydroxypropylacrylate, hydroxypropylmethacrylate, C1-C4 alkyl(meth)acrylate, vinyl acetate, acrylamide, or combinations thereof;
- and
- (c) between about 0.1 to 3 mol-% of at least one cross-linking agent.
A fire extinguishing water based composition for use in fire prevention and fire fighting, the fire extinguishing water composition comprising:
- (a) a salt containing water having common salt (NaCl) as the largest saline moiety and between about 2 and 28 weight-% total salt content;
- and
- (b) a dispersion of an additive comprising a water-swellable polymer, the water-swellable polymer comprising:
- (i) between about 50 and 70 mol-% of at least one unsaturated sulfonic acid group containing monomer;
- (ii) between about 25 and 60 mol-% of at least one nonionic monomer selected from any one of methacrylamide, n-alkyl-substituted acrylamide, 2-hydroxyethylacrlate, 2-hydroxyethyl methacrylate, hydroxypropylacrylate, hydroxypropylmethacrylate, C1-C4 alkyl(meth)acrylate, vinyl acetate, acrylamide, or combinations thereof;
- and
- (iii) between about 0.1 to 3 mol-% of at least one cross-linking agent,
- wherein a quantity of the additive used in the fire extinguishing water based composition is an amount that provides an amount of electrolyte sufficient to raise a viscosity of the fire extinguishing water based composition to over about 1000 mPas.
An additive for making a fire extinguishing water based composition using a salt containing water having common salt (NaCl) as the largest saline moiety and between about 2 and 28 weight-% total salt content, the additive comprising a water-in-oil polymer dispersion comprising:
- (a) between about 50 and 70 mol-% of at least one unsaturated sulfonic acid group containing unsaturated monomer, wherein the at least one sulfonic acid group containing unsaturated monomer is selected from the group consisting of sulfoethylacrylate, sulfoethylmethacrylate, sulfopropylacrylate, sulfopropylmethacrylate, 2-hydroxy-3-methacryloxypropylsulfonic acid, water-soluble salts of sulfoethylacrylate, water-soluble salts of sulfoethylmethacrylate, water-soluble salts of sulfopropylacrylate, water-soluble salts of sulfopropylmethacrylate, water-soluble salts of 2-hydroxy-3-methacryloxypropylsulfonic acid, and combinations thereof;
- (b) between about 25 and 60 mol-% of at least one nonionic monomer, wherein the at least one nonionic monomer is selected from the group consisting of methacrylamide, n-alkyl-substituted acrylamide, 2-hydroxyethylacrlate, 2-hydroxyethyl methacrylate, hydroxypropylacrylate, hydroxypropyl methacrylate, C1-C4 alkyl(meth)acrylate, vinyl acetate, acrylamide, and combinations thereof;
- and
- (c) between about 0.1 to 3 mol-% of at least one cross-linking agent,
- wherein the additive comprises a water-swellable polymer having a swelling time in said salt containing water of not more than about 30 seconds.
Dependencies are inferred from the claim text.