ACRYLIC POLYMER AND METHOD FOR PRODUCING THE SAME

PROBLEM TO BE SOLVED: To provide an acrylic polymer capable of exhibiting good moldability even under severe polymerizing/molding conditions to achieve high productivity and producing a molded product excellent in coloring resistance and thermostability.SOLUTION: In the acrylic polymer, a concentrat...

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Hauptverfasser:	MOTOYOSHI MASANORI, MATSUO MITSUHIRO, HAYASHIDA MASAHIRO
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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Zusammenfassung:	PROBLEM TO BE SOLVED: To provide an acrylic polymer capable of exhibiting good moldability even under severe polymerizing/molding conditions to achieve high productivity and producing a molded product excellent in coloring resistance and thermostability.SOLUTION: In the acrylic polymer, a concentration of a furan ring structure is ≤0.2 ppm, and a concentration of an organic acid is ≤1 ppm. In a method for producing the acrylic polymer, a partially polymerized solution, which is obtained by continuously performing partial polymerization of a monomer material for obtaining the acrylic polymer, is supplied to a devolatilizing extruder to complete polymerization, and simultaneously, to separate and remove volatile matters.