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B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
B01J13/00—Colloid chemistry, e.g. the production of colloidal materials or their solutions, not otherwise provided for; Making microcapsules or microballoons
B01J13/02—Making microcapsules or microballoons
B01J13/06—Making microcapsules or microballoons by phase separation
B01J13/14—Polymerisation; cross-linking
B01J13/18—In situ polymerisation with all reactants being present in the same phase
A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
A01N25/00—Biocides, pest repellants or attractants, or plant growth regulators, characterised by their forms, or by their non-active ingredients or by their methods of application, e.g. seed treatment or sequential application; Substances for reducing the noxious effect of the active ingredients to organisms other than pests
A01N25/26—Biocides, pest repellants or attractants, or plant growth regulators, characterised by their forms, or by their non-active ingredients or by their methods of application, e.g. seed treatment or sequential application; Substances for reducing the noxious effect of the active ingredients to organisms other than pests in coated particulate form
A01N25/28—Microcapsules or nanocapsules
Landscapes
Life Sciences & Earth Sciences
(AREA)
Health & Medical Sciences
(AREA)
General Health & Medical Sciences
(AREA)
Chemical & Material Sciences
(AREA)
Pest Control & Pesticides
(AREA)
Environmental Sciences
(AREA)
Toxicology
(AREA)
Engineering & Computer Science
(AREA)
Dentistry
(AREA)
Wood Science & Technology
(AREA)
Zoology
(AREA)
Plant Pathology
(AREA)
Agronomy & Crop Science
(AREA)
Organic Chemistry
(AREA)
Dispersion Chemistry
(AREA)
Chemical Kinetics & Catalysis
(AREA)
Agricultural Chemicals And Associated Chemicals
(AREA)
Manufacturing Of Micro-Capsules
(AREA)
Claims (1)
controlo era o seguinte:— PERCENTAGEM DE CONTROLO Exemplos Cânhamo chinês Quenopódio 81 84 85 84 96 98 Banvel Este ensaio comprova a excelente persistência, na zona das ervas daninhas em questão, das microcápsulas de acordo com a presente invenção, em comparação com o mesmo ingrediente activo na forma convencional. REIVINDICAÇÕES lã - Processo para a preparação microencapsuladas de lixiviação to de compreender as operações a) se adicionar a uma suspensão líquido, pré-polímero de ureia, de composições agoquímicas rápida, caracterizado pelo fao-que consistem em do composto agroquímico num tio-ureia ou melamina formal- 2 5control was as follows: - CONTROL PERCENTAGE Examples Chinese Hemp Hound Kopopod 81 84 85 84 96 98 Banvel This test demonstrates the excellent persistence in the weed zone in question of the microcapsules according to the present invention compared to the same ingredient active in the conventional way. Process for the microencapsulated leaching preparation to comprise the steps a) is added to a liquid suspension, urea prepolymer, of fast tacky compositions, characterized in that the compound consists of the agrochemical compound in a thiourea or melamine formaldehydedeído ou suas misturas, sendo o referido pré-polímero ou mistura miscivel com o citado liquido, e b) se curar o citado pré-polímero para se obter um polímero reticulado que encerra o agente agroquímico. 2- - Processo de acordo com a reivindicação 1, caracteriza-do pelo facto de o agente agroquímico estar sob a forma cristalina. 3â - Processo de acordo com as reivindicações 1 ou 2, carac-terizado pelo facto de se suspender o composto agroquímico a ser encapsulado numa forma pouco solúvel a um valor de pH superior a 4. 4§ _ Processo de acordo com as reivindicações la 3, carac-terizado pelo facto de o pré-polímero ser um pré-polímero de melamina formaldeído ou uma mistura de um pré-polímero de me-lamina formaldeído com um pré-polímero de ureia formaldeído. 5ã - Processo de acordo com as reivindicações 1 a 4, caracte-rizado pelo afeto de a operação de microencapsulagem se realizar em fases sucessivas pela repetição das operações a) e b).or mixtures thereof, said prepolymer or mixture being miscible with said liquid, and b) curing said prepolymer to provide a crosslinked polymer enclosing the agrochemical. 2. A process according to claim 1, wherein the agrochemical is in crystalline form. 3. A process according to claim 1 or 2, wherein the agrochemical compound to be encapsulated in a poorly soluble form is suspended at a pH value of more than 4. The process according to claim 1, , characterized in that the prepolymer is a melamine formaldehyde prepolymer or a mixture of a metallamine formaldehyde prepolymer with a urea formaldehyde prepolymer. 5. A process according to any one of claims 1 to 4, characterized in that the microencapsulation step takes place in successive steps by repeating steps a) and b).6- - Processo de acordo com as reivindicações 1 a 5, caracte-rizado pelo facto de o tamanho médio das partículas do composto agroquímico estar compreendido no intervalo entre 1 e Γ 7- - Processo de acordo com as reivindicações 1 a 6, caracte-rizado pelo facto de o tamanho das partículas do produto em microcápsulas estar compreendido entre 10 e 50 Mm. 8- - Processo de acordo com as reivindicações 1 a 7, caracte-rizado pelo facto de o composto agroquímico ser escolhido do grupo formado por 2-cloro-N-(2,6-dietilfenil)-N-(metoximetil)--acetamida (alaclor); 2-cloro-21-etil-61-metil-N-(etoximetil)--acetamida (acetoclor), 2-cloro-N-(2-etil-6-metilfenil)-N-(2--metoxi-l-metiletil)-acetamida (metolaclor) e 2-cloro-N-£ 1--metil-2-metoxij| -N-(2,4-dimetil-tien-3-il)-acetamida e pela forma de sal de ferro ou de alumínio de ácido 3,6-dicloro-2--metoxibenzóico (dicamba), ácido (4-cloro-2-metil fenoxi)--acético (MCPA)- ou ácido (2,4-diclorofenoxi)-acético (2,4-D). 9- - Processo de acordo com a reivindicação 8, caracterizado pelo facto de o composto agroquímico ser dicamba. 10- - Processo de acordo com qualquer das reivindicações anteriores, caracterizado pelo facto de se obter microcápsulas corn tendo um composto agroquímico de lixiviação rápida encerrado um pré-polímero de ureia formaldeído ou melamina formaldeído, ou um pré-polímero misto reticulado. 11- - Processo de acordo com a reivindicação 10, caracterizado pelo facto de o polímero reticulado ser um polímero de melamina formaldeído ou uma mistura de um polímero de lemamina formaldeído com um polímero de ureia formaldeído. 1Ζ- - Processo de acordo com as reivindicações 10 ou 11, ca-racterizado pelo facto de se adicionar ao composto agroquími-co encerrado nas microcápsulas um agente veicular agricolamen— to aceitável. 13â - Processo de acordo com a reivindicação 12, caracteriza-do pelo facto de se adicionar ainda um composto agroquímico que não fica encerrado nas microcápsulas. 14§ _ Processo para controlar a presença de pestes ou o desenvolvimento de plantas indesejáveis, caracterizado pelo facto de se aplicar ao local onde se encontram essas pestes ou plarv-tas indesejáveis ou antecipadamente uma quantidade efectiva de microcápsulas de acordo com os processos 1 a 13, de preferência, compreendida entre cerca de 0,11 a 1,1 Kg de substância activa por hectare. Lisboa,26 de Setembro de 1990 0 Agente ~J“n "--------' ’ 1 Industrial6. A process as claimed in any one of claims 1 to 5, wherein the average particle size of the agrochemical compound is in the range of 1 to 7. A process according to claims 1 to 6, characterized in that the particle size of the microcapsule product is between 10 and 50 μm. 8. A process according to any one of claims 1 to 7, wherein the agrochemical is selected from the group consisting of 2-chloro-N- (2,6-diethylphenyl) -N- (methoxymethyl) acetamide (alachlor); 2-chloro-N- (2-ethyl-6-methylphenyl) -N- (2-methoxy-1-methyl-N- (ethoxymethyl) acetamide (acetochlor) methylethyl) -acetamide (metolachlor) and 2-chloro-N-1-methyl-2-methoxy- Dimethyl-thien-3-yl) -acetamide and the iron or aluminum salt form of 3,6-dichloro-2-methoxybenzoic acid (dicamba), (4-chloro- 2-methylphenoxy) acetic acid (MCPA) - or (2,4-dichlorophenoxy) acetic acid (2,4-D). 9. A process according to claim 8, wherein the agrochemical compound is dicamba. 10. A process as claimed in any one of the preceding claims, wherein microcapsules having a fast leaching agrochemical compound are made of a preformed urea formaldehyde or melamine formaldehyde or a cross-linked mixed prepolymer. 11. A process according to claim 10, wherein the crosslinked polymer is a melamine formaldehyde polymer or a mixture of a lemamine formaldehyde polymer with a urea formaldehyde polymer. 11. A process as claimed in claim 10 or 11, characterized in that an agriculturally acceptable carrier is added to the agrochemical compound contained in the microcapsules. 13. A process according to claim 12, characterized in that an agrochemical compound which is not enclosed in the microcapsules is further added. 14. A process for controlling the presence of pests or the development of undesirable plants, characterized in that an effective amount of microcapsules according to processes 1 to 13 are applied to the place where such pests or pests are present or in advance. , preferably from about 0.11 to 1.1 kg of active substance per hectare. Lisbon, September 26, 1990 Agent "J" n " -------- "1 IndustrialAg»nfo Oficial du P, j.U ti I*· raí.-i-.l fi. Castilho, 201-3. £.-1000 LiòuOA Telefs. Ó51339-654613The present invention relates to a process for the preparation of a compound of the formula (I). Castilho, 201-3. £.-1000 LiòuOA Telefs. Ó51339-654613
PT95429A1989-09-281990-09-26
PROCESS FOR THE PREPARATION OF MICROENCAPSULATED AGROCHEMICAL COMPOSITIONS
PT95429A
(en)
COMPOSITION INCLUDING PROTECTIVE COMPLEX INCLUDING CLOQUINTOCET AND POLYMERS OR OLIGOMERS CONTAINING AMINE, ITS PREPARATION METHOD, AND METHOD FOR CONTROL OF UNDESIRABLE VEGETATION