Carbosilane containing fire-extinguishing foam

Abstract

The invention relates to fire-extinguishing foams or concentrates, which include a carbohydrate containing silane surfactant.

Claims

1. A method of manufacturing a fire extinguishing foam comprising the steps of: providing a concentrate comprising a surfactant containing at least one substituted or unsubstituted carbohydrate or carbohydrate derivative and at least one oligosilane, wherein the surfactant comprises a molecule that is selected from the group consisting of: ##STR00016## or mixtures thereof, wherein A is a substituted or unsubstituted carbohydrate or carbohydrate derivative comprising one to twenty sugar units, B represents a linker substructure of at least one atom or chain, C is an oligosilane or oxacarbosilane, and D is an oligosiloxane; diluting the concentrate with water; mixing the diluted concentrate to form a diluted mixture; and aerating the diluted mixture to form a fire extinguishing foam.

2. The method of manufacturing a fire extinguishing foam according to claim 1, wherein C is a di-, tri-, tetra- or pentasilane.

3. The method of manufacturing a fire extinguishing foam according to claim 1, wherein C is selected from one of the following structures: ##STR00017## wherein each R is independently ethyl or methyl, n (each independently) represents 1, 2 or 3, and j, k, m is 1-9, wherein 1j+k+m10; ##STR00018## wherein each R is independently ethyl or methyl, each X is independently (CH.sub.2).sub.n or O, wherein n (each independently) is 1, 2 or 3, and j, k, m is 1-9, wherein 1j+k+m10; and ##STR00019## wherein each R is independently ethyl or methyl, each X is independently (CH.sub.2).sub.n or O, wherein n (each independently) is 1, 2 or 3, and j, k, m is 1-9 wherein 1j+k10.

4. The method of manufacturing a fire extinguishing foam according to claim 1, wherein A represents a mono-, di- and trisaccharide, a sugar acid, an amino sugar or cyclitol, or an ether, ester, amide or thioester of these compounds.

Description

EXAMPLE I

(1) Example I refers to a surfactant according to the present invention having the following structure:

(2) ##STR00006##

(3) The spreading behavior of solutions of various concentrations of Example I with 6.0 g/l and 12 g/l Gluopon 215 CSUP (alkylpolyglycoside) was examined. The results are summarized in the following table:

(4) TABLE-US-00001 TABLE I Example I g/l Glucopon g/l Spreading behaviour 5.0 12.0 Spreads moderately 4.0 12.0 Spreads middle rate 3.0 12.0 Spreads slowly 2.0 12.0 Spreads slowly 3.0 6.0 Spreads moderately 2.0 6.0 Spreads middle rate 1.0 6.0 Spreads slowly 0.5 6.0 Spreads very slowly

EXAMPLE II

(5) Example II relates to a surfactant according to the present invention having the following structure:

(6) ##STR00007##

(7) The spreading behavior of a solution of 2.0 g/l of Example II and 6.0 g/l Glucopon 215 CSUP (alkylpolyglycoside) was examined; it has been found that this compound spreads very slowly.

EXAMPLE III

(8) Example III relates to a surfactant according to the present invention having the following structure

(9) ##STR00008##

(10) The spreading behavior of solution of 2.0 g/l of Example III and 6.0 g/l Glucopon 215 CSUP (alkylpolyglycoside) was examined; it has been found that this compound spreads very slowly.

EXAMPLE VI

(11) Example IV relates to a surfactant according to the present invention having the following structure

(12) ##STR00009##

(13) The spreading behavior of a solution of 2.0 g/l of Example IV and 6.0 g/l Glucopon 215 CSUP (alkylpolyglycoside) was examined; it has been found that this compound spreads slowly.

EXAMPLE V

(14) Example V relates to a surfactant according to the present invention having the following structure.

(15) ##STR00010##

(16) The spreading behavior of a solution of 2.0 g/l of Example V and 6.0 g/l Glucopon 215 CSUP (alkylpolyglycoside) was examined; it has been found that this compound spreads slowly.

EXAMPLE VI

(17) Example VI relates to mixture of two surfactants, one of them according to the present invention having the following structures:

(18) ##STR00011##

(19) The spreading behavior of a solution of each 0.5 g/l and 1.0 g/l of the individual components of Example VI and 6.0 g/l Glucopon 215 CSUP (alkylpolyglycoside) was examined; it has been found that these mixtures spread fast and very fast, respectively.

EXAMPLE VII

(20) Example VII relates to surfactant according to the present invention having the following structure:

(21) ##STR00012##

(22) The spreading behavior of a solution of 4.0 g/l of Example VII and 6.0 g/l Glucopon 215 CSUP (alkylpolyglycoside) was examined; it has been found that this compound spreads very slowly.

EXAMPLE VIII

(23) Example VIII relates to a surfactant according to the present invention having the following structure:

(24) ##STR00013##

(25) The spreading behavior of a solution of 4.0 g/l of Example VIII and 6.0 g/l Glucopon 215 CSUP (alkylpolyglycoside) was examined; it has been found that this compound spreads very slowly and on a small area.

(26) Manufacture of Glycosidsilane

(27) The silane glycoside surfactants shown in the examples can, inter alia, be prepared from the corresponding carbohydrates as follows:

(28) ##STR00014##

(29) Example VII has been prepared as follows:

(30) ##STR00015##

(31) Investigation of the Spreading Behavior

(32) In order to investigate the spreading behavior 5 ml cyclohexane were placed in a Petri dish 9 cm in diameter. Then one drop of an unfoamed surfactant solution was respectively added and it was observed whether and how the surfactant solution spreads on the surface of the cyclohexane.

(33) The individual combinations of the components and features of the embodiments mentioned above are exemplary; the replacement and substitution of these teachings with other teachings that are included in this document with the cited references are also explicitly contemplated. A person skilled in the art will recognize that in addition to the embodiments described herein variations, modifications and other embodiments may be realized without departing from the spirit and scope of the invention. Thus, the above description is to be considered as exemplary rather than limiting. The term comprise or include used in the claims does not exclude other elements or steps. The indefinite article a does not exclude the meaning of a plural.

(34) The mere fact that certain measures are recited in mutually different claims does not imply that a combination of these measures cannot be used to advantage. The scope of the invention is defined in the following claims and their equivalents.