摘要:
Encapsulated salts of organic or inorganic acid particles having sparing solubility in water wherein the salt particles are surrounded by a pressure-resistant, elastic, abrasion-resistant polyurethane/polyurea casing, the ratio by weight of salt to the polyurethane component of the casing material being 1:0.2 to 1:2.5, are produced by emulsifying a mixture of 83 to 28% by weight of the salt to be encapsulated and 17 to 72% by weight of a polyurethane prepolymer containing free isocyanate groups in water in the presence of a protective colloid and reacting the emulsified prepolymer with the equivalent amount of polyamine at temperatures from 0.degree. to 80.degree. C., with vigorous mixing.
摘要:
Encapsulated salts of organic or inorganic acid particles having sparing solubility in water wherein the salt particles are surrounded by a pressure-resistant, elastic, abrasion-resistant polyurethane/polyurea casing, the ratio by weight of salt to the polyurethane component of the casing material being 1:0.2 to 1:2.5, are produced by emulsifying a mixture of 83 to 28% by weight of the salt to be encapsulated and 17 to 72% by weight of a polyurethane prepolymer containing free isocyanate groups in water in the presence of a protective colloid and reacting the emulsified prepolymer with the equivalent amount of polyamine at temperatures from 0.degree. to 80.degree. C., with vigorous mixing.
摘要:
Aqueous emulsions of a plant protective agent such as a pesticide dispersed in the presence of a phosphate ester of a block copolymer of (1) ethylene and propylene oxides or (2) of an ethoxylated/propoxylated fatty alochol.
摘要:
Pressure-resistant polyurethane-polyurea particles with textured internal mass prepared from a liquid phase immiscible with water and containing organic solvents, isocyanate prepolymers and optionally active substances or mixtures of active substances, the liquid phase being dispersed in an aqueous phase at temperatures of from 0.degree. C. to 95.degree. C., wherein the liquid organic phase contains as isocyanate prepolymer a reaction product of a stoichiometric excess of an aliphatic, aromatic, cycloaliphatic, or araliphatic di- or polyisocyanate with a di- or polyol, the reaction product having a mean molecular weight in the range of from about 300 to 10,000, and an alkyl and/or alkoxyalkyl acetate of the formula ##STR1## in which m is zero, 1 or 2, n is 1 to 4, and R is (C.sub.1 -C.sub.5)alkyl, and the aqueous phase contains a protective colloid and optionally a surface-active agent.
摘要:
The present invention relates to liquid herbicidal agents in the form of emulsifiable concentrates (EC) or concentrated emulsions (EW), which, in addition to 1-40% by weight of the active compound diclofop-methyl (I), fenoxaprop-ethyl (II) or the optically active isomer (D+) thereof fenoxaprop-P-ethyl (III), contain, as surfactants, 0.5-30% by weight of (C.sub.10 -C.sub.18)-fatty alcohol polyglycol ethers or (C.sub.8 -C.sub.9)-alkylphenyl polyglycol ethers which are ethoxylated with 6-10 mol of ethylene oxide, and in the case of EC formulations 0.5-7% by weight of calcium (C.sub.8 -C.sub.14)-alkylbenzenesulfonate, and in the case of EW formulations, as a dispersing agent, 0.5-7% by weight of an ethylene oxide-propylene oxide-ethylene oxide block copolymer phosphorylated in the alpha- and omega-position, or a salt thereof, in addition to the customary formulation constituents. Compared with the known active compound formulations, these have significantly increased activities and improved mixing properties with water and other commercially available preparations containing active compounds.
摘要:
What are disclosed are pressure-resistant microcapsules comprising a polyamide shell having therein a structural mass of a polyurethane-polyurea polymer and an encapsulated water-immiscible liquid phase, and methods for making the same by dispersing a water-immiscible liquid phase in an aqueous phase and subsequently or simultaneously admixing therewith an aqueous solution of a diamine or polyamine, said dispersed phase comprising a polyamide forming acid compound, diisocyanate or polyisocyanate or a prepolymer thereof, and an inert organic aprotic hydrophilizing agent.
摘要:
Microcapsules having a shell consisting of water-soluble polyvinyl alcohol and containing a liquid, water-in-soluble material are obtained by dispersing a liquid, water-insoluble phase of a substance, substance mixture or substance solution in an aqueous phase of polyvinyl alcohol obtained by partial hydrolysis of polyvinyl acetate and having a degree of hydrolysis of from 72 to 99 mol % and dehydrating the dispersion to obtain the capsules in powder form.
摘要:
Herbicidal aqueous microemulsions containing a combination of a herbicidal phenoxyphenoxy- or hetercaryloxyphenoxy-carboxylic acid ester with a salt of the herbicide bentazone (3-isopropyl-1H-benzo-2,1,3-thiadiazin-4-one 2,2-dioxide) as active substances; one or more emulsifiers wetting agents from among calcium dodecylbenzenesulfonate, ethoxylated castor oil, the ethoxylated nonylphenols, the alkanol polyglycol ethers or the fatty acid polyglycol esters, and one or more organic solvents from among the aromatics or ketones, are storage-stable at low and higher temperatures and show no inhomogeneities.
摘要:
Herbicidal compositions containing a compound of the formula I ##STR1## in which R is H, alkyl or a cation equivalent of a base, in combination with a compound of the formula II ##STR2## in which R is as defined above, have a selective synergistic herbicidal effect against weed grasses in dicotyledonous crop plants.
摘要:
Processes for the preparation of nitrosamine-free N,N-disubstituted nitroaromatic amines by degradation of their nitrosamine components formed during their preparation, and by stabilization of the products against renewed formation of nitrosamines, by treating the amines in liquid or molten form with a sulfonic acid, where necessary in the presence of inert organic solvents or diluents.