Roussel Uclaf

Hoechst Marion Roussel

Colette Meinard

Jean-Claude Suglia

Claude Taranta

Jean-Jacques Herve

Michel Bourgogne

Pesticidal paste compositions

Method for preparing granules containing one or more active principles

Granules prepared by absorbing on hydrophilic polymer granules an aqueous emulsion of at least one active principle and drying the resulting mixture to obtain granules which release the active principle in uniform manner.

Hydrophilic polymer granules for uniform release of active principle

Granules prepared by absorbing on hydrophilic polymer of acrylic acid polymers and/or acrylamide polymers granules an aqueous emulsion of at least one active principle such as pyrethrinoids and drying the resulting mixture to obtain granules which release the active principle in uniform manner.

Method of combatting pests by applying novel granules to the soil

An active principle microencapsulated in an envelope formed by interfacial polymerization of two non-miscible phases A and B, organic phase A comprising at least one water insoluble active principle which do not react with each other, a polyfunctional monomer a and a solvent for the active principle and aqueous phase B comprising a polyfunctional monomber b and a catalyst which allows a progressive diffusion of the active principle and protects the same from the environment.

Microencapsulation product and process

Novel light-stable pyrethrinoid pesticidal compositions comprising (a) at least one liquid vehicle, (b) at least one surface-active agent soluble in the said liquid vehicle, (c) at least one azodyestuff stabilizer and (d) at least one ester of the formula ##STR1## .

Light-stable pesticidal compositions

Novel light-stable pyrethrinoid pesticidal compositions comprising (a) at least one liquid vehicle, (b) at least one surface-active agent soluble in the said liquid vehicle, (c) at least one azodyestuff stabilizer selected from the group consisting of a mixture of 1-[{4-(phenylazo)-phenyl)}-azo]-3-naphthalenol and 4-[{4-(phenylazo)-phenyl}-azo]-phenol (a component of Scarlet R), 1-[4-(4-phenylazo-phenyl)-azo]-naphthalene (Red organol BS), 1-[{2-methyl-4-(2-methylphenylazo)-phenyl}-azo]-2-naphthalenol (Red Sudan IV), 1-[(2-methoxyphenol)-azo]-2-naphthaphenol (Vermillion organol); 1-[(1-naphthalenyl)-azo]-2-naphthalenol (Scarlet 2R for fat), 1-(phenylazo)-2-naphthalenol (Sudan I), 1-[(2-hydroxy-4-methyl-phenyl)-azo]-2-naphthalenol (Sudan II), 1-[{dimethyl-4-[(dimethyl)-phenyl]-azo}-phenylazo]-2-naphthalenol (Red to fat 5B), N-ethyl-1-[{4-(phenylazo)-phenyl}-azo]-2-naphthalenylamine (Red to fat 7B), 1-[{1-naphthalenyl}-azo]-2,4-benzene-diamine (Brown RR to fat), 2-[(2-methoxyphenyl)-azo]-phenol (Red to fat G), disodium 4-hydroxy-3-[(4-sulfo-1-naphthalenyl)-azo]-1-naphthalene sulfonate (azo ruby), 4-[(4-ethoxyphenyl)-azo]-1-naphthalenol (Brown to fat B), 2,4-dihydro-5-methyl-2-phenyl-4-(phenylazo)-3H-pyrazol-3-one (Yellow to fat 3G), N,N-diethyl-4-(phenylazo)-benzeneamine (Yellow to fat GGN), 2,3-dihydro-2,2-dimethyl-6-[(4-phenylazo)-1-naphthalenyl]-azo-1H-perimidin e (Black to fat HB), N-[4-phenyl)-(4-phenylamino)-1-naphthalenyl]-azo methylene-2,5-cyclohexadien-1-ylidene-N-methyl-methaniminium chloride (Blue to fat B) and 1-[{4-(phenylazo)-phenyl}-azo]-2-naphthalenol and (d) at least one ester of the formula ##STR1## wherein Y is selected from the group consisting of ##STR2## in its various stereoisomeric forms and mixtures thereof, Z is alkyl of 1 to 6 carbon atoms, Y is selected from the group consisting of hydrogen, halogen, --CN, --NO.sub.3, alkyl of 1 to 4 carbon atoms and alkoxy of 1 to 4 carbon atoms, n is 0, 1, 2 or 3, W is selected from the group consisting of ##STR3## X.sub.1 is selected from the group consisting of hydrogen, fluorine, chlorine and bromine, X.sub.2 is selected from the group consisting of fluorine, chlorine and bromine, X.sub.3 is selected from the group consisting of chlorine, bromine and iodine, X.sub.4 is a halogen and X.sub.5 is a halogen optionally other than that of X.sub.4 and due to asymetric carbon atom in W, the compounds are in the A isomer or B isomer form or mixtures thereof and R is selected from the group consisting of ##STR4## and benzyl optionally substituted with at least one member of the group consisting of alkyl of 1 to 4 carbon atoms, alkenyl of 2 to 6 carbon atoms, alkenyloxy of 2 to 6 carbon atoms, alkadienyl of 4 to 8 carbon atoms, methylenedioxy, benzyl and halogens, R.sub.1 is selected from the group consisting of hydrogen and methyl, R.sub.2 is selected from the group consisting of monocyclic aryl and --CH.sub.2 --C.tbd.CH, R.sub.3 is an aliphatic of 2 to 6 carbon atoms having at least one carbon-carbon insaturation, R.sub.4 is selected from the group consisting of hydrogen, --CN, CH.sub.3 and --C.tbd.CH, R.sub.5 is selected from the group consisting of chlorine and methyl, n is 0, 1 or 2, R.sub.6, R.sub.7, R.sub.8 and R.sub.9 are individually selected from the group consisting of hydrogen, chlorine and methyl and S/I indicates that the ring may be aromatic, dihydro or tetrahydro the alcoholic moiety R-OH being capable of containing one or more asymetric carbon atoms and of existing in the form of various stereoisomers and their use to combat pests.

A process for the preparation of stable suspensions and powders of stable microcapsules containing at least one active material having a variable porosity comprising preparing a colloidal solution of equal parts by weight of gelatin and acacia gum with a total concentration of 4 to 6% by weight of the final emulsion, preparing an oil solution, suspension or emulsion of the active material at a concentration of 1 to 5% by weight of the final emulsion and containing a variable amount of organosoluble ethyl hydroxyethylcellulose, mixing the said two compositions with stirring at a temperature near 50.degree. C. in the presence of an emulsifying agent to form an 'oil in water' emulsion, effecting consecutively coacervation and microencapsulation of the emulsified droplets containing the active material by adjusting the pH to 4.2 to 4.4 by addition of an acid and then cooling the mixture to about 20.degree. C. with stirring, reticulating the walls of the formed microcapsules by reaction with glutaric aldehyde and tannin with stirring at about 20.degree. C. and either forming a concentrated suspension of microcapsules by slow addition at 20.degree. C. of a water soluble ethyl hydroxyethylcellulose to the eticulated microcapsules or adding an antiagglomeration agent with stirring to the reticulated microcapsules at 20.degree. C. and drying the resulting powder and the microcapsules produced thereby which are stable with respect to physico chemical influences and to exterior elements generally, such as sunlight and temperature changes so that the encapsulated active material maintains its activity.

Growing community of inventors

Marseille, France

Colette Meinard