DE2334345A1 - SHORT CHAIN OLEFINSULFONATE AS WETTING AGENTS FOR BIOCIDE INJECTION POWDER - Google Patents

Description

? λ? 3 \ ΪΈ.ΧΚΣ HOECHST AG formerly Heister Lucius &. Brüning V / Erk Gendorf

Hoe 73 / P 909

Gendorf, June 27, 1973 Gd 1563 File number: Dr. Br / ED

"Short-chain olefin sulfonates as wetting agents for biocides Wettable powder "

Organic water-insoluble bio-oils are widely used in shape used by so-called wettable powders. These are powdery preparations of bio-silk, which are used as aqueous Suspensions are used. To ensure proper use, these suspensions should be good Have wetting effect. The wettable powders generally contain not only the active ingredient (bioeid) but also carrier substances such as sum for example aluminum or magnesium silicates or synthetic silicas and optionally adhesives and also Wetting and dispersing agents. The content of active ingredient in the wettable powder can vary within wide limits; he is usually about 20 to 80 percent by weight. The proportion of wetting and dispersing agents in the wettable powders is generally low at about 0.5 to 8 percent by weight.

A biocidal wettable powder must, however, have good dispersing power, good setting action and low foam in order to be able to use it in practice to be operational with success. Because mostly good dispersants have no or insufficient wetting effect, is the use of a agitator that meets the above-mentioned requirements in combination with this dispersant fulfilled, necessary.

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In technology, alkyl sulfates, alkyl ether sulfates, alkyl or alkylaryl polyglycol ethers are used as hardening and dispersing agents for biocidal spray powders. These in themselves as good ly ^ xser well-known products are in either of those described above Combination with active ingredient (bioeid) and inorganic carrier is completely inadequate or affects the dispersing power the dispersant negative or show a much too high undesirable foam.

It is particularly difficult to meet all three requirements in practice: good dispersibility (good suspension ability), short wetting times and low foam, at the same time.

It has now been found that olefin sulfonates with a chain length of Cg to C .. ,, preferably C ₁₀ to CL? ' ^π ^ ^e i ^nea content of disulfonates of -ζ 25 $> in connection with a dispersant (alkyl-formaldehyde condensation product) fully meet the requirements of practice.

The Ct-olefin sulfonates used as wetting agents according to the invention can be prepared by known processes by sulfonation vonoL-olefins with an average chain length of 6 to 12 carbon atoms has, preferably of oi-olefin mixtures, the majority of which has 10 and 12 carbon atoms in the chain, with sulfur trioxide or other sulfonation agents and subsequent hydrolysis and neutralization of the sulfonation products take place. The sulfonates obtained in this way represent a mixture which essentially consists of a predominant proportion of alkene sulfonates and a smaller proportion of hydroxysulfonates consists. Some of the sulfonates are in the form of disulfonates. The preparation of the olefin sulfonates is for example described in K. Lindner, "Surfactants, textile auxiliaries, washing raw materials", Volume III (1971), pages 2299 to 2515. For use in the context of the present invention, in particular the alkali sulfonates, especially the sodium sulfonates, are considered. »

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409885/1336

The wetting agents according to the invention are contained in the wettable powder formulations in amounts of 0.3 to Z> -, preferably 0.5 to 1 ^.

As examples of organic bio silk, which with the help of the past carieben üietzers can be processed into wettable powders, are mentioned:

Chlorinated hydrocarbons, such as:

1,1,1-trichloro-2,2-bis (p-chlorophenyl) ethane (DDT); • ^ -hexachlorocyclohexane (lindane);

1,2,4,5,6,7,8,8a-octa-chloro-4,7-methano-3a, 4,7,7a-tetrahydroindane (chlordane ^ ');

1, 2,5,4,10, IO-hexachloro-1,4,4a, 5,8,8a-hexahydro-1,4-endo, exo, 5, S-dimethanonaphthalene (Aldrin);

1,2,5,4,10,1O-hexachloro-6-epoxy-i, 4,4a, 5,6,7,8,8a-octahydro-1,4-endo, exo-5,8-dimethanonaphthalene (Dieldrin); Chlorinated camphene (toxaphene ^v ');
sov.'ie 'thio-phosphoric acid esters, such as
0, C-diethyi-0- (p-nitrophenyl) thiophosphate (parathion);

0, C-DiL: ethyl dithiophosphate of diethyl mercaptosuccinate (Malathior.).

Ali fillers are used: Silica chalk, silica, Silicates or kaolin.

409885/1 336 BAD OWGlNAL

Suitable dispersants are: Reaction products from Xresol, Porinaldehyde and liatric luasulphite, as well as lignosulphonates in Form of their sodium and calcium salts.

; i-games:

The dispersing properties and the shower / retention of the substances according to the invention and the comparison substances when using the wetting agent in biocidal spray powders were comparatively tested in application-technical investigations. In these studies, the determination was made of the suspension properties after Zylindermethede Fischer (see. Manual of agricultural testing and research methodology (I-Iethodenbuch) Sand 711 "The investigations of plant protection products" from \ i. Fischer (1941), page 53 and page 12 ). (Column D in! Table)

The determination of the capacity was carried out as follows:

A 500 ml beaker (8 em diameter) is filled with tap water of 20 ⁰ C and 12 dK and one gram of the scattered to be tested spray powder onto the surface. The time it takes to wet the powder is measured and given as the wet time in seconds. (Column 17 in table).

The examination of the show ability was after J. Ross and G-. D. Miles (cf. Oil and Soap IS (1941), 99) with a concentration of 4 grams of the wettable powder to be tested per liter ',.' water with a measurement of 500 ml. It was the foam height in cm at the beginning and after 5 minutes Length of stay measured. (Column S in! Table)

The following wettable powder formulations were used for the comparative investigations with the I.'etzuiic dispersants to be tested:

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233-3-5

oO ! Parts of r-KexGcrilorcyclohexim (Lindan) 4o "I-vicijellcroide

3 "dispersant (UniLietsur ^ sprouulct auc cresol, Porraaldehyde and sodium sulfite 50:57:49)

0.5 or 1 "test product (see [table)]

50 parts of 1,1,1-trichloro-2,2-bis (p-chlorophenyl) ethane (DDT)

10 "silica

3d pebble chalk

3 "dispersant (see above)

0.5 or 1 "trial product (see table)

30 parts 1, 2, .3,4,7,7-hexachlorobicyclo- (2, 2,1) -2-heptene-5,6-bis-oxymethylene sulfite (Thiodane)

3 "silica

63 "pebble chalk

3 "dispersant (see above)

0.5 D3W.1 "trial product (see table)

D 50 parts of K- (trichloromethylthio) phthalimide (o-phaltan) 46 "pebble chalk

3 "dispersant (see above) 0.5 or 1" test product (see table)

ϊ- 25 parts of 2-chloro-4,6-bis (ethylamino) -triazine (simazine) 71 "pebble chalk

3 "dispersant (see above) 0.5 to 1" test product (see table)

The results of the application test are shown below Table compiled.

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aeigt -in comparison, d 2 already in gerii ^ ge.i Lin ^ ut ^ ^ kcn cntra functions excellent lietzzQixen eraielt \ (0.5 ■>?): cracn that de Yergleichsprodukten are superior. Furthermore, the swell of the powder is not adversely affected in any case, on the contrary it is sometimes even improved. The foaming behavior is excellent, there are no or minimal foams.

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A09885 / 1 336

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Claims (1)

Patent claims: Use of olefin sulfonates of chain length C
tiis C _1. , in particular the chain length from Cq to Containing disulfonates ( $ 25 as a wetting agent for biocide wettable powders. Use according to claim 1, characterized in that
that the olefin sulfonate is used in combination with a dispersant. Use according to claim 1 and 2, characterized in that the use concentration of the wetting agent, based on the total spray powder $ 0.3 to 2, preferably 0.5 to 1 is io. Biocid spray powder, characterized by a content of $ 0.5 to $ 2, preferably $ 0.5 to $ 1 olefin sulfonate. Biocid spray powder, consisting of ■ 25 to 50 io active ingredient
71.5 to 44 1 = filler 3 to 4 l " dispersant
0.3 to 2 io wetting agent. 409885/1336