TRANSPARENT BRANCHED POLYCARBONATE
A method for preparing a modified polycarbonate comprises i) providing a polycarbonate prepared by the melt transesterification of a bisphenol and a diaryl carbonate preferably having a Fries branching level of from 750 to 2000 ppm, ii) combining the polycarbonate and from 0.10-0.75 wt.%, based on t...
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| creator | JHA ROSHAN KUMAR SINGH RAJINDER PONNIAH THAVAMANI LI SIJUN THELAKKADAN ABDUL SALAM |
| description | A method for preparing a modified polycarbonate comprises i) providing a polycarbonate prepared by the melt transesterification of a bisphenol and a diaryl carbonate preferably having a Fries branching level of from 750 to 2000 ppm, ii) combining the polycarbonate and from 0.10-0.75 wt.%, based on the amount of polycarbonate, of a modifier, iii) reacting the modifier and said polycarbonate in molten state at a temperature of from 250 - 300 DEG C and a reaction time of at least 30 seconds so as to form the modified polycarbonate, wherein said modifier is a styrene-(meth)acrylate copolymer containing glycidyl groups and having i) from 250 to 500 gram epoxy groups per mol and ii) a weight average molecular weight of from 3000 to 8500 g/mol, and the modified polycarbonate has a transmittance of at least 85% and a haze of at most 5% as determined in accordance with ASTM D1003-13 on an injection moulded sheet having a thickness of 3 mm.
一种制备改性聚碳酸酯的方法，所述方法包括：i)提供通过双酚和二芳基碳酸酯的熔融酯交换制备的、优选具有750至2000ppm的弗利斯分支水平的聚碳酸酯，ii)将 |
| format | Patent |
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一种制备改性聚碳酸酯的方法，所述方法包括：i)提供通过双酚和二芳基碳酸酯的熔融酯交换制备的、优选具有750至2000ppm的弗利斯分支水平的聚碳酸酯，ii)将</description><language>chi ; eng</language><subject>CHEMISTRY ; COMPOSITIONS BASED THEREON ; MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS ; METALLURGY ; ORGANIC MACROMOLECULAR COMPOUNDS ; THEIR PREPARATION OR CHEMICAL WORKING-UP</subject><creationdate>2021</creationdate><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://worldwide.espacenet.com/publicationDetails/biblio?FT=D&date=20210112&DB=EPODOC&CC=CN&NR=112218906A$$EHTML$$P50$$Gepo$$Hfree_for_read</linktohtml><link.rule.ids>230,308,776,881,25542,76290</link.rule.ids><linktorsrc>$$Uhttps://worldwide.espacenet.com/publicationDetails/biblio?FT=D&date=20210112&DB=EPODOC&CC=CN&NR=112218906A$$EView_record_in_European_Patent_Office$$FView_record_in_$$GEuropean_Patent_Office$$Hfree_for_read</linktorsrc></links><search><creatorcontrib>JHA ROSHAN KUMAR</creatorcontrib><creatorcontrib>SINGH RAJINDER</creatorcontrib><creatorcontrib>PONNIAH THAVAMANI</creatorcontrib><creatorcontrib>LI SIJUN</creatorcontrib><creatorcontrib>THELAKKADAN ABDUL SALAM</creatorcontrib><title>TRANSPARENT BRANCHED POLYCARBONATE</title><description>A method for preparing a modified polycarbonate comprises i) providing a polycarbonate prepared by the melt transesterification of a bisphenol and a diaryl carbonate preferably having a Fries branching level of from 750 to 2000 ppm, ii) combining the polycarbonate and from 0.10-0.75 wt.%, based on the amount of polycarbonate, of a modifier, iii) reacting the modifier and said polycarbonate in molten state at a temperature of from 250 - 300 DEG C and a reaction time of at least 30 seconds so as to form the modified polycarbonate, wherein said modifier is a styrene-(meth)acrylate copolymer containing glycidyl groups and having i) from 250 to 500 gram epoxy groups per mol and ii) a weight average molecular weight of from 3000 to 8500 g/mol, and the modified polycarbonate has a transmittance of at least 85% and a haze of at most 5% as determined in accordance with ASTM D1003-13 on an injection moulded sheet having a thickness of 3 mm.
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一种制备改性聚碳酸酯的方法，所述方法包括：i)提供通过双酚和二芳基碳酸酯的熔融酯交换制备的、优选具有750至2000ppm的弗利斯分支水平的聚碳酸酯，ii)将</abstract><oa>free_for_read</oa></addata></record> |
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| subjects | CHEMISTRY COMPOSITIONS BASED THEREON MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS METALLURGY ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-UP |
| title | TRANSPARENT BRANCHED POLYCARBONATE |
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