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<h1 id="firstHeading" class="firstHeading mw-first-heading"><span class="mw-page-title-main">Polycarbonatdiole</span></h1>
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<p><b>Polycarbonatdiole</b> sind <a href="Aliphatisch" class="mw-redirect" title="Aliphatisch">aliphatische</a> <a href="Polymer" title="Polymer">polymere</a> <a href="Kohlens%C3%A4ureester" title="Kohlensäureester">Kohlensäureester</a> mit endständigen <a href="Hydroxygruppe" title="Hydroxygruppe">Hydroxygruppen</a>.
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<div class="mw-heading mw-heading2"><h2 id="Gewinnung_und_Darstellung">Gewinnung und Darstellung</h2></div>
<p>Aliphatische Polycarbonatdiole können in einem zweistufigen Verfahren durch die katalysierte (z. B. Tetrabutoxy-Titan, <a href="Dibutylzinnoxid" title="Dibutylzinnoxid">Dibutylzinnoxid</a> oder <a href="Basen_(Chemie)" title="Basen (Chemie)">Basen</a>) Reaktion eines <a href="Diol" class="mw-redirect" title="Diol">Diols</a> mit entweder <a href="Dimethylcarbonat" class="mw-redirect" title="Dimethylcarbonat">Dimethylcarbonat</a> (DMC) oder <a href="Diphenylcarbonat" class="mw-redirect" title="Diphenylcarbonat">Diphenylcarbonat</a> (DPC) hergestellt werden. In der letzten Reaktionsstufe wird überschüssiges DMC oder DPC und Monoalkohol (<a href="Methanol" title="Methanol">Methanol</a> oder <a href="Phenol" title="Phenol">Phenol</a>) unter vermindertem Druck entfernt, um die endständige <a href="Hydroxygruppe" title="Hydroxygruppe">Hydroxylfunktionalität</a> (–OH) freizulegen.<sup id="cite_ref-gantrade.com_1-0" class="reference"><a href="#cite_note-gantrade.com-1"><span class="cite-bracket">[</span>1<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-2" class="reference"><a href="#cite_note-2"><span class="cite-bracket">[</span>2<span class="cite-bracket">]</span></a></sup>
</p><p>Die Verbindungen können auch direkt aus <a href="Kohlendioxid" class="mw-redirect" title="Kohlendioxid">Kohlendioxid</a> und einem <a href="Diole" title="Diole">Diol</a> (wie zum Beispiel <a href="1%2C6-Hexandiol" title="1,6-Hexandiol">1,6-Hexandiol</a>) gewonnen werden.<sup id="cite_ref-3" class="reference"><a href="#cite_note-3"><span class="cite-bracket">[</span>3<span class="cite-bracket">]</span></a></sup>
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<div class="mw-heading mw-heading2"><h2 id="Eigenschaften">Eigenschaften</h2></div>
<p>Polycarbonatdiole weisen eine gute <a href="Isocyanat" class="mw-redirect" title="Isocyanat">Isocyanatreaktivität</a> auf. Sie weisen die höchste hydrolytische Stabilität unter den <a href="Polyesterpolyole" title="Polyesterpolyole">Polyesterpolyolen</a> auf, da sie nur wenig Feuchtigkeit absorbieren und bei der <a href="Hydrolyse" title="Hydrolyse">Hydrolyse</a> <a href="Kohlenstoffdioxid" title="Kohlenstoffdioxid">Kohlenstoffdioxid</a> erzeugen, ohne eine saure Komponente zu bilden. Saure Anteile <a href="Autokatalyse" title="Autokatalyse">autokatalysieren</a> die weitere Hydrolyse im Soft-Block des <a href="Polyurethan" class="mw-redirect" title="Polyurethan">Polyurethans</a>.<sup id="cite_ref-gantrade.com_1-1" class="reference"><a href="#cite_note-gantrade.com-1"><span class="cite-bracket">[</span>1<span class="cite-bracket">]</span></a></sup>
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<div class="mw-heading mw-heading2"><h2 id="Verwendung">Verwendung</h2></div>
<p>Polycarbonatdiole werden zur Herstellung von <a href="Polyurethane" title="Polyurethane">Polyurethanen</a> verwendet.<sup id="cite_ref-gantrade.com_1-2" class="reference"><a href="#cite_note-gantrade.com-1"><span class="cite-bracket">[</span>1<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-4" class="reference"><a href="#cite_note-4"><span class="cite-bracket">[</span>4<span class="cite-bracket">]</span></a></sup>
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<div class="mw-heading mw-heading2"><h2 id="Einzelnachweise">Einzelnachweise</h2></div>
<ol class="references">
<li id="cite_note-gantrade.com-1"><span class="mw-cite-backlink">↑ <sup><a href="#cite_ref-gantrade.com_1-0">a</a></sup> <sup><a href="#cite_ref-gantrade.com_1-1">b</a></sup> <sup><a href="#cite_ref-gantrade.com_1-2">c</a></sup></span> <span class="reference-text">Gantrade: <a rel="nofollow" class="external text" href="https://www.gantrade.com/blog/ultimate-performance-polyurethanes-based-on-polycarbonate-diols">Polycarbonate Diols for Ultimate Performance Polyurethanes | Gantrade</a>, abgerufen am 23. Oktober 2022.</span>
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<li id="cite_note-2"><span class="mw-cite-backlink"><a href="#cite_ref-2">↑</a></span> <span class="reference-text">Menglu Song, Xiangui Yang, Gongying Wang: <cite style="font-style:italic">Preparation of polycarbonate diols (PCDLs) from dimethyl carbonate (DMC) and diols catalyzed by KNO<sub>3</sub>/γ-Al<sub>2</sub>O<sub>3</sub></cite>. In: <cite style="font-style:italic"><a href="RSC_Advances" title="RSC Advances">RSC Advances</a></cite>. <span style="white-space:nowrap">Band<span style="display:inline-block;width:.2em"> </span>8</span>, <span style="white-space:nowrap">Nr.<span style="display:inline-block;width:.2em"> </span>61</span>, 2018, <span style="white-space:nowrap">S.<span style="display:inline-block;width:.2em"> </span>35014–35022</span>, <a href="Digital_Object_Identifier" title="Digital Object Identifier">doi</a>:<span class="uri-handle" style="white-space:nowrap"><a rel="nofollow" class="external text" href="https://doi.org/10.1039/C8RA07141A">10.1039/C8RA07141A</a></span>.<span class="Z3988" title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rfr_id=info:sid/de.wikipedia.org:Polycarbonatdiole&rft.atitle=Preparation+of+polycarbonate+diols+%28PCDLs%29+from+dimethyl+carbonate+%28DMC%29+and+diols+catalyzed+by+KNO3%2F%CE%B3-Al2O3&rft.au=Menglu+Song%2C+Xiangui+Yang%2C+Gongying+Wang&rft.date=2018&rft.doi=10.1039%2FC8RA07141A&rft.genre=journal&rft.issue=61&rft.jtitle=RSC+Advances&rft.pages=35014-35022&rft.volume=8" style="display:none"> </span></span>
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<li id="cite_note-3"><span class="mw-cite-backlink"><a href="#cite_ref-3">↑</a></span> <span class="reference-text">Yu Gu, Masazumi Tamura, Yoshinao Nakagawa, Kenji Nakao, Kimihito Suzuki, Keiichi Tomishige: <cite style="font-style:italic">Direct synthesis of polycarbonate diols from atmospheric flow CO<sub>2</sub> and diols without using dehydrating agents</cite>. In: <cite style="font-style:italic"><a href="Green_Chemistry_(Zeitschrift)" title="Green Chemistry (Zeitschrift)">Green Chemistry</a></cite>. <span style="white-space:nowrap">Band<span style="display:inline-block;width:.2em"> </span>23</span>, <span style="white-space:nowrap">Nr.<span style="display:inline-block;width:.2em"> </span>16</span>, 2021, <span style="white-space:nowrap">S.<span style="display:inline-block;width:.2em"> </span>5786–5796</span>, <a href="Digital_Object_Identifier" title="Digital Object Identifier">doi</a>:<span class="uri-handle" style="white-space:nowrap"><a rel="nofollow" class="external text" href="https://doi.org/10.1039/D1GC01172C">10.1039/D1GC01172C</a></span>.<span class="Z3988" title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rfr_id=info:sid/de.wikipedia.org:Polycarbonatdiole&rft.atitle=Direct+synthesis+of+polycarbonate+diols+from+atmospheric+flow+CO2+and+diols+without+using+dehydrating+agents&rft.au=Yu+Gu%2C+Masazumi+Tamura%2C+Yoshinao+Nakagawa%2C+...&rft.date=2021&rft.doi=10.1039%2FD1GC01172C&rft.genre=journal&rft.issue=16&rft.jtitle=Green+Chemistry&rft.pages=5786-5796&rft.volume=23" style="display:none"> </span></span>
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<li id="cite_note-4"><span class="mw-cite-backlink"><a href="#cite_ref-4">↑</a></span> <span class="reference-text">Victor Costa, Andrés Nohales, Paula Félix, Carmen Guillem, David Gutiérrez, Clara María Gómez: <cite style="font-style:italic">Structure-property relationships of polycarbonate diol-based polyurethanes as a function of soft segment content and molar mass</cite>. In: <cite style="font-style:italic"><a href="Journal_of_Applied_Polymer_Science" title="Journal of Applied Polymer Science">Journal of Applied Polymer Science</a></cite>. 2014, <a href="Digital_Object_Identifier" title="Digital Object Identifier">doi</a>:<span class="uri-handle" style="white-space:nowrap"><a rel="nofollow" class="external text" href="https://doi.org/10.1002/app.41704">10.1002/app.41704</a></span>.<span class="Z3988" title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rfr_id=info:sid/de.wikipedia.org:Polycarbonatdiole&rft.atitle=Structure-property+relationships+of+polycarbonate+diol-based+polyurethanes+as+a+function+of+soft+segment+content+and+molar+mass&rft.au=Victor+Costa%2C+Andr%C3%A9s+Nohales%2C+Paula+F%C3%A9lix%2C+...&rft.btitle=Journal+of+Applied+Polymer+Science&rft.date=2014&rft.doi=10.1002%2Fapp.41704&rft.genre=book" style="display:none"> </span></span>
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