METHOD OF RECOVERING POLYMER POWDER

PROBLEM TO BE SOLVED: To provide a method whereby, when polymer powder is recovered from latex comprising a polymer with a high glass-transition temperature, the generation of impalpable powder can be prevented without reduced quality of the polymer, and the polymer powder can be recovered at good y...

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Bibliographische Detailangaben
Hauptverfasser:	MATSUOKA SHINJI, TAKEMOTO TOSHIO
Format:	Patent
Sprache:	eng ; jpn
Schlagworte:	AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G CHEMISTRY COMPOSITIONS BASED THEREON GENERAL PROCESSES OF COMPOUNDING METALLURGY ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-UP WORKING-UP
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Beschreibung
Zusammenfassung:	PROBLEM TO BE SOLVED: To provide a method whereby, when polymer powder is recovered from latex comprising a polymer with a high glass-transition temperature, the generation of impalpable powder can be prevented without reduced quality of the polymer, and the polymer powder can be recovered at good yields.SOLUTION: A method of recovering polymer powder is characterized in that latex comprising a polymer (A) with a glass-transition temperature of 90°C or more is coagulated with a coagulant in the presence of at least one compound (B) selected from a hindered phenolic compound (b1) and a thiol compound (b2).SELECTED DRAWING: None 【課題】ガラス転移温度の高い重合体を含むラテックスから重合体粉体を回収する際に、重合体が有する品質を低下させることなく、微粉の発生を抑制でき、収率良く重合体粉体を回収できる方法を提供する。【解決手段】ガラス転移温度が９０℃以上の重合体（Ａ）を含むラテックスを、ヒンダードフェノール系化合物（ｂ１）及びチオール化合物（ｂ２）から選ばれる少なくとも１種の化合物（Ｂ）の存在下で、凝析剤を用いて凝析する重合体粉体の回収方法。【選択図】なし