US4303534A — Foam fire-extinguishing composition and preparati…

Claim 1

Independent Claim 136 words

A foam fire-extinguishing composition which comprises a foam fire-extinguishing agent selected from at least one member of the group consisting of a fluorine-containing surfactant, a synthetic surfactant containing no fluorine atom and a partially hydrolyzed protein-containing foaming agent and, as an additive, from 0.2 to 50% by weight based on said fire-extinguishing agent of a water-soluble high molecular compound having not less than several repeating units which contain a fluoroalkyl group and a water-solubilizable group, a molecular weight of not less than 5000 and a fluorine content of not less than 10% by weight and is soluble in water in an amount of at least 0.1% by weight at 25° C. and of which the surface tension is not more than 50 dyn/cm when measured on 0.1 to 5.0% by weight aqueous solution at 25° C.

Claim 2

Dependent Claim 136 words

A foam fire-extinguishing composition which comprises a foam fire-extinguishing agent selected from at least one member of the group consisting of a fluorine-containing surfactant, a synthetic surfactant containing no fluorine atom and a partially hydrolyzed protein-containing foaming agent and, as an additive, from 0.2 to 50% by weight based on said fire-extinguishing agent of a water-soluble high molecular compound having not less than several repeating units which contain a fluoroalkyl group and a water-solubilizable group, a molecular weight of not less than 5000 and a fluorine content of not less than 10% by weight and is soluble in water in an amount of at least 0.1% by weight at 25° C. and of which the surface tension is not more than 50 dyn/cm when measured on 0.1 to 5.0% by weight aqueous solution at 25° C.

Claim 3

Dependent Claim 25 words

The composition according to claim 1, wherein the water-solubilizable group is hydroxyl, 2-oxopyrrolidinyl, carboxyl, phosphate, sulfate, sulfo or amino in a free or salt form.

Claim 4

Dependent Claim 16 words

The composition according to claim 1, wherein the fluoroalkyl group has 4 to 20 carbon atoms.

Claim 5

Independent Claim 155 words

A method for extinguishing a fire caused by organic polar solvents which comprises the application to said fire of a foam fire-extinguishing composition comprising a foam fire-extinguishing agent selected from at least one member of the group consisting of a fluorine-containing surfactant, a synthetic surfactant containing no fluorine atom and a partially hydrolyzed protein-containing foaming agent and, as an additive, from 0.2 to 50% by weight based on said fire-extinguishing agent of a water-soluble high molecular compound having not less than several repeating units which contain a fluoroalkyl group and a water-solubilizable group, has a molecular weight of not less than 5000 and a fluorine content of not less than 10% by weight and is soluble in water in an amount of at least 0.1% by weight at 25° C. and of which the surface tension is not more than 50 dyn/cm when measured on 0.1 to 5.0% by weight aqueous solution at 25° C.

Claim 6

Independent Claim 155 words

A method for extinguishing a fire caused by organic polar solvents which comprises the application to said fire of a foam fire-extinguishing composition comprising a foam fire-extinguishing agent selected from at least one member of the group consisting of a fluorine-containing surfactant, a synthetic surfactant containing no fluorine atom and a partially hydrolyzed protein-containing foaming agent and, as an additive, from 0.2 to 50% by weight based on said fire-extinguishing agent of a water-soluble high molecular compound having not less than several repeating units which contain a fluoroalkyl group and a water-solubilizable group, has a molecular weight of not less than 5000 and a fluorine content of not less than 10% by weight and is soluble in water in an amount of at least 0.1% by weight at 25° C. and of which the surface tension is not more than 50 dyn/cm when measured on 0.1 to 5.0% by weight aqueous solution at 25° C.

Claim 7

Dependent Claim 33 words

The method of claim 4 wherein said water-soluble high molecular compound additive contains a water-solubilizable group which is a hydroxyl, 2-oxopyrrolidinyl, carboxyl, phosphate, sulfate, sulfo or amino in a free or salt form.

Claim 8

Dependent Claim 22 words

The method of claim 4 wherein said water-soluble high molecular compound additive contains a fluoralkyl group having 4 to 20 carbon atoms.

Claim 9

Dependent Claim 149 words

In a method for enhancing the fire-extinguishing properties of a conventional foam fire-extinguishing agent the improvement which comprises incorporating into a foam fire-extinguishing agent selected from at least one member of the group consisting of a fluorine-containing surfactant, a synthetic surfactant containing no fluorine atom and a partially hydrolyzed protein-containing foaming agent, an additive having, from 0.2 to 50% by weight based on said fire-extinguishing agent of a water-soluble high molecular compounds having not less than several repeating units which contain a fluoroalkyl group and a water-solublilizable group, a molecular weight of not less than 5000 and a fluorine content of not less than 10% by weight and is soluble in water in an amount of at least 0.1% by weight at 25° C. and of which the surface tension is not more than 50 dyn/cm when measured on 0.1 to 5.0% by weight aqueous solution at 25° C.

Claim 10

Dependent Claim 149 words

In a method for enhancing the fire-extinguishing properties of a conventional foam fire-extinguishing agent the improvement which comprises incorporating into a foam fire-extinguishing agent selected from at least one member of the group consisting of a fluorine-containing surfactant, a synthetic surfactant containing no fluorine atom and a partially hydrolyzed protein-containing foaming agent, an additive having, from 0.2 to 50% by weight based on said fire-extinguishing agent of a water-soluble high molecular compounds having not less than several repeating units which contain a fluoroalkyl group and a water-solublilizable group, a molecular weight of not less than 5000 and a fluorine content of not less than 10% by weight and is soluble in water in an amount of at least 0.1% by weight at 25° C. and of which the surface tension is not more than 50 dyn/cm when measured on 0.1 to 5.0% by weight aqueous solution at 25° C.

Claim 11

Dependent Claim 43 words

The method of claim 7 wherein said water-soluble high molecular compound additive contains a water-solubilizable group which is a hydroxyl, 2-oxopyrrolidinyl, carboxyl, phosphate, sulfate, sulfo or amino in a free or salt form, and a fluoroalkyl group having 4 to 20 carbon atoms.

Annuity Stage	Window Opens	Payment Deadline	Surcharge Period Until	Estimated Fee	Status
3.5 Years (Year 4)	1984-11-30	1985-06-01	1985-12-01	$2000.00	Window Closed / Lapsed
7.5 Years (Year 8)	1988-11-30	1989-06-01	1989-12-01	$3760.00	Window Closed / Lapsed
11.5 Years (Year 12)	1992-11-30	1993-06-01	1993-12-01	$7700.00	Window Closed / Lapsed

Foam fire-extinguishing composition and preparation and use thereof

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