Process of production of crosslinked polymeric styrene-butylacrylate dispersion with particles of type core/cover

• Main Authors: CHRASTOVA VIERA, NOVAKOVA-VOLFOVA PETRA, CERNAKOVA LUDMILA
• Format: Patent
• Language: English; Slovak
• Published: 07.07.2004
• Edition: 7
• Subjects: AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G; CHEMISTRY; COMPOSITIONS BASED THEREON; GENERAL PROCESSES OF COMPOUNDING; MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVINGCARBON-TO-CARBON UNSATURATED BONDS; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; WORKING-UP

Process of production of crosslinked polymeric styrene-butylacrylate dispersion with structured latex particles of the type core/cover, wherein the polymerisation runs in the emulsion by two-stage synthesis, with continuous dosing of monomers, under low temperatures in acid medium, in the system comprising initiator, activator and mixture emulsifier. In the first stage of the synthesis, 30 to 45 wt. % of styrene is polymerised with or without functioning monomer comprising carboxylic, methylolamide or alkoxymethylamide groups and without interrupting the synthesis in the second stage the butylacrylate is polymerised after adding the initiator with or without mentioned functioning monomers under the temperature from 30 to 50 °C. Spôsob výroby presietenej polymérnej styrén-butylakrylátovej disperzie so štrukturovanými latexovými časticami typu jadro/obal, kde polymerizácia prebieha v emulzii dvojstupňovou násadovou syntézou, s kontinuálnym dávkovaním monomérov, pri nízkych teplotách v kyslom prostredí, v systéme obsahujúcom iniciátor, aktivátor a zmesný emulgátor. V prvom stupni syntézy polymerizuje 30 až 45 % hmotn. styrénu bez alebo za prítomnosti funkčného monoméru obsahujúceho karboxylové, metylolamidové alebo alkoxymetylamidové skupiny a bez prerušenia syntézy v druhom stupni po pridaní iniciátora polymerizuje butylakrylát bez alebo za prítomnosti vyššie uvedených funkčných monomérov pri teplote od 30 do 50 °C.ŕ