PROCESS FOR RECOVERY OF RUBBER-MODIFIED VINYL(CO)POLYMER

The invention relates to a process for recovery of rubber-modified vinyl(co)polymer from a polycarbonate resin or an optionally shredded molded part made thereof wherein the polycarbonate resin comprisesA) Polycarbonate based on aromatic or aliphatic diol or mixtures thereofB) Rubber-modified vinyl(...

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Bibliographische Detailangaben
Hauptverfasser:	HEYLEN, Kristof, REITHMEIER, Marina, VANDEN EYNDE, Johan, HOBEIKA, Sven, SLUIJS, Ivan, SLUYTS, Erik
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	ACYCLIC OR CARBOCYCLIC COMPOUNDS AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G CHEMISTRY COMPOSITIONS BASED THEREON COMPOSITIONS OF MACROMOLECULAR COMPOUNDS GENERAL PROCESSES OF COMPOUNDING MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS MAKING GRANULES OR PREFORMS METALLURGY ORGANIC CHEMISTRY ORGANIC MACROMOLECULAR COMPOUNDS PERFORMING OPERATIONS PREPARATION OR PRETREATMENT OF THE MATERIAL TO BESHAPED RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIALCONTAINING PLASTICS THEIR PREPARATION OR CHEMICAL WORKING-UP TRANSPORTING WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL WORKING-UP
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Beschreibung
Zusammenfassung:	The invention relates to a process for recovery of rubber-modified vinyl(co)polymer from a polycarbonate resin or an optionally shredded molded part made thereof wherein the polycarbonate resin comprisesA) Polycarbonate based on aromatic or aliphatic diol or mixtures thereofB) Rubber-modified vinyl(co)polymerwherein the process comprises the stepsi) Bringing into contact the resin or the optionally shredded molded part made thereof with at least one alcohol together with at least one transesterification catalyst to obtain a slurry (i) wherein the solid fraction of the slurry (i) comprises the polycarbonate resin or the optionally shredded molded part made thereof and the liquid fraction of the slurry (i) comprises the alcoholii) heating the slurry (i) to 60 to 90 °C, preferably 65 to 85 °C and keeping the temperature to obtain a slurry (ii) wherein the solid fraction of the slurry (ii) comprises rubber-modified vinyl(co)polymer and the liquid fraction of the slurry comprises aliphatic and/or aromatic diol;iii) separating the solid fraction from the liquid fraction of the slurry (ii);iv) optionally washing the solid fraction;and the use of the recovered rubber-modified vinyl (co)polymer for the production of molded parts as well as blend partner in polycarbonate blends. Further optional aspects are the recovery of aromatic and/or aliphatic diol and the use of this diol for the production of polycarbonates.