PRODUCTION OF IMPACT-RESISTANT ACRYLIC POLYMER

PURPOSE:To produce the titled polymer having excellent transparency, surface gloss, flow, moldability, and processability, by forming a methyl methacrylate copolymer and an alkyl acrylate copolymer by three-stage polymerization under specified conditions. CONSTITUTION:A first-stage rigid polymer of...

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Bibliographische Detailangaben
Hauptverfasser:	NEGI KAZUYA, HOSOYA KAZUHIRO
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 produce the titled polymer having excellent transparency, surface gloss, flow, moldability, and processability, by forming a methyl methacrylate copolymer and an alkyl acrylate copolymer by three-stage polymerization under specified conditions. CONSTITUTION:A first-stage rigid polymer of a Tg>=25 deg.C is obtained by emulsion-polymerizing a mixture of 80wt% or above methyl methacrylate, 20wt% or below another copolymerizable monomer (e.g., acrylic acid) and 5wt% or below still another copolymerizable polyfunctional grafting monomer (e.g., allyl acrylate). To this polymer is added a monomer mixture comprising 70-95wt% (1- 5C) alkyl acrylate and 5-30wt% copolymerizable monomer (e.g., styrene), and the polymerization for forming a second-stage flexible polymer of a Tg=25 deg.C and a MW of 60,000-250,000.