PRODUCTION OF IMPACT-RESISTANT THERMOPLASTIC RESIN

PURPOSE:To obtain a resin having excellent balance among impact resistance, stress deterioration resistance and appearance, by adding a vinyl monomer to a latex of large-particle rubbery polymer, ploymerizing the mixture, adding a small-particle rubbery polymer to the mixture and emulsion-polymerizi...

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Bibliographische Detailangaben
Hauptverfasser:	FUKUMOTO TADAO, KISHIMOTO AKIHIKO, MORITA YOSHITOMO
Format:	Patent
Sprache:	eng
Schlagworte:	CHEMISTRY COMPOSITIONS BASED THEREON MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVINGCARBON-TO-CARBON UNSATURATED BONDS METALLURGY ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-UP
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Beschreibung
Zusammenfassung:	PURPOSE:To obtain a resin having excellent balance among impact resistance, stress deterioration resistance and appearance, by adding a vinyl monomer to a latex of large-particle rubbery polymer, ploymerizing the mixture, adding a small-particle rubbery polymer to the mixture and emulsion-polymerizing the resulting mixture. CONSTITUTION:In emulsion-polymerizing (A) 70-30pts.wt. vinyl monomer in the presence of (B) 30-70pts.wt. (as solids) rubbery polymer latex; (1) a latex of a large-particle size (weight-average particle size >=0.25mu) polymer is charged in an amount corresponding to 50-75wt% (as solids) of total rubbery polymers (B) and a vinyl monomer is added in an amount corresponding to 45-95wt% of the total vinyl monomers and the mixture is polymerized until the conversion reaches 60wt% or higher, and (2) a latex of a small-particle size (weight-average particle size