Fire extinguishing composition

Claim 2

A fire extinguishing composition which comprises at least 50% by weight of bromofluorohydrocarbon and/or bromochlorofluorohydrocarbon and 0.5 to 40% by weight of a fluorine-containing high molecular compound, wherein said fluorine-containing high molecular compound has an average molecular weight of not less than 5,000 said fluorine-containing high molecular compound is a compound having a perfluoroalkyl group, and said fluorine-containing high molecular compound contains fluorine in an amount of at least 10% by weight.

Claim 3

A fire extinguishing composition as defined in claim 1, wherein the fluorine-containing high molecular compound is a homopolymer of an ethylenically unsaturated compound having a perfluoroalkyl group and at least one group selected to a (meth)acrylate group, vinyl group and vinyloxy group; a copolymer of the above ethylenically unsaturated compound and an other copolymeriazble monomer having no fluorine.

Claim 4

A fire extinguishing composition as defined in claim 1, wherein the fluorine-containing high molecular compound is a compound obtained by reacting a high molecular compound having a functional group but containing no fluorine with an alcohol, amine, carboxylic acid or epoxy compound having a perfluoroalkyl group.

Claim 5

A fire extinguishing composition as defined in claim 2, wherein the ethylenically unsaturated compound having a perfluoroalkyl group and at least one group selected from a (meth)acrylate group, vinyl group and vinyloxy group are: Rf(CH.sub.2).sub.n OCOCR.sup.1 ═CH.sub.2 RfSO.sub.2 N(R.sup.2)R.sup.3 OCOCR.sup.1 ═CH.sub.2 RfCON(R.sup.2)R.sup.3 OCOCR.sup.1 ═CH.sub.2 Rf(CH.sub.2).sub.n CH(OH)CH.sub.2 OCOCR.sup.1 ═CH.sub.2 Rf(CH.sub.2).sub.n CH(OCOR.sup.4)CH.sub.2 OCOCR.sup.1 ═CH.sub.2 RfCH═CH(CH.sub.2).sub.n OCOCR.sup.1 ═CH.sub.2 Rf(CH.sub.2).sub.n CH═CH.sub.2 Rf(CH.sub.2).sub.n OCH═CH.sub.2 Rf(CH.sub.2).sub.n NH.sub.3 OCOCR.sup.1 ═CH.sub.2 Rf(CH.sub.2).sub.n NHCH.sub.2 CH(OH)CH.sub.2 OCOCR.sup.1 ═CH.sub.2 Rf(CH.sub.2)n--1COOCH.sub.2 CH(OH)CH.sub.2 OCOCR.sup.1 ═CH.sub.2 Rf(CH.sub.2)OCOCH═CHCOOR.sup.2 wherein Rf is a perfluoroalkyl group having 4 to 21 carbon atoms, R 1 is a hydrogen atom or methyl group, R 2 is a hydrogen atom or alkyl group having 1 to 10 carbon atoms, R 3 is an alkylene group having 1 to 10 carbon atoms, R 4 is an alkyl group, and n is an integer of 1 to 10.

Claim 6

A fire extinguishing composition as defined in claim 1, wherein the fluorine-containing high molecular compound is soluble in the bromofluorohydrocarbon and/or bromochlorofluorohydrocarbon in an amount of at least 0.5% by weight.

Claim 7

A fire extinguishing method in which the composition of claim 1 is applied to a fire of oil.