METHOD FOR PRODUCING SPHERICAL POLYORGANOSILSESQUIOXANE MICROPARTICLE

PROBLEM TO BE SOLVED: To form monodisperse spherical microparticles even under reaction conditions in which monodisperse spherical particles can not be heretofore formed due to e.g. the agglomeration of particles in producing spherical polyorganosilsesquioxane microparticles by hydrolytically conden...

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Main Authors ISHII MASANORI, NEGISHI KENJI
Format Patent
LanguageEnglish
Published 03.12.2003
Edition7
Subjects
CHEMISTRY
COMPOSITIONS BASED THEREON
MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
METALLURGY
ORGANIC MACROMOLECULAR COMPOUNDS
THEIR PREPARATION OR CHEMICAL WORKING-UP
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Abstract PROBLEM TO BE SOLVED: To form monodisperse spherical microparticles even under reaction conditions in which monodisperse spherical particles can not be heretofore formed due to e.g. the agglomeration of particles in producing spherical polyorganosilsesquioxane microparticles by hydrolytically condensing an organotrialkoxysilane and/or a partial hydrolyzate thereof in a reaction solution. SOLUTION: In adding an organotrialkoxysilane and/or a partial hydrolyzate thereof to a reaction solution, a polymeric dispersant exemplified by polyvinyl alcohol is present in the reaction solution. COPYRIGHT: (C)2004,JPO
AbstractList PROBLEM TO BE SOLVED: To form monodisperse spherical microparticles even under reaction conditions in which monodisperse spherical particles can not be heretofore formed due to e.g. the agglomeration of particles in producing spherical polyorganosilsesquioxane microparticles by hydrolytically condensing an organotrialkoxysilane and/or a partial hydrolyzate thereof in a reaction solution. SOLUTION: In adding an organotrialkoxysilane and/or a partial hydrolyzate thereof to a reaction solution, a polymeric dispersant exemplified by polyvinyl alcohol is present in the reaction solution. COPYRIGHT: (C)2004,JPO
Author NEGISHI KENJI
ISHII MASANORI
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Snippet PROBLEM TO BE SOLVED: To form monodisperse spherical microparticles even under reaction conditions in which monodisperse spherical particles can not be...
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SubjectTerms CHEMISTRY
COMPOSITIONS BASED THEREON
MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
METALLURGY
ORGANIC MACROMOLECULAR COMPOUNDS
THEIR PREPARATION OR CHEMICAL WORKING-UP
Title METHOD FOR PRODUCING SPHERICAL POLYORGANOSILSESQUIOXANE MICROPARTICLE
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