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Application filed by Mexicano Inst PetrolfiledCriticalMexicano Inst Petrol
Priority to MX1687589ApriorityCriticalpatent/MX170343B/en
Publication of MX170343BpublicationCriticalpatent/MX170343B/en
La presente invención se refiere a un procedimiento para la preparación de copolímeros clorometilados, caracterizado porque comprende las siguientes etapas; a un sistema de reacción provisto con sistemas de agitación y medición y control de temperatura se alimentó una matriz polimerica compuesta por 50 a 90 por ciento de estireno, hasta 10 por ciento de divnilbenceno, de 0.1 a 5 por ciento de acrilonitrilo y hasta 5 por ciento de acrilato de metilo, con un disolvente clorado o mezcla de disolventes de diferente polaridad.The present invention relates to a process for the preparation of chloromethylated copolymers, characterized in that it comprises the following steps; A polymer matrix consisting of 50 to 90 percent styrene, up to 10 percent divnylbenzene, 0.1 to 5 percent acrylonitrile, and up to 5 percent percent methyl acrylate, with a chlorinated solvent or solvent mixture of different polarities.
MX1687589A1989-07-211989-07-21
PROCEDURE FOR OBTAINING CHLOROMETILATED COPOLYMERS
MX170343B
(en)
Electron emitting device; Manufacturing method of electron emitting device, manufacturing method thereof, and display device and electron beam writing device using this device.
ESTER 2,3,5,6-TETRAFLUOROBENZYLIC ACID (+) 1R-TRANS-2,2-DIMEGHYL-3- (2,2 DICHLOROVINYL) -CYCLOPROPANE-CARBOXYLIQUE, ITS PREPARATION PROCESS AND INSECTICIDE COMPOSITION CONTAINING IT.