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src="https://tyunfile.71360.com/UploadFile/cdcykj/637281754176621093/2041773.png" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div></div><div id="pjrogq4" class="content"><p><span>需求數(shù)量：</span>0</p><p><span>價(jià)格要求：</span>面議</p><p><span>所在地：</span>四川省</p><p><span>包裝要求：</span><span style="color: #f30;"></span></p><p><span>產(chǎn)品關(guān)鍵詞：</span>宜賓巴斯夫異氰酸酯黑料,異氰酸酯</p><p><span>***更新：</span>2021-01-16 10:06:42</p><p><span id="click" >瀏覽次數(shù)：0次</span></p><a rel="nofollow" class="button">聯(lián)系我們</a></div></div><div id="veliuyc" class="rightbox"><h3>公司基本資料信息</h3><p style="border:0;"><a rel="nofollow">成都成英科技有限公司</a></p><p><span>聯(lián)系人：</span>何英</p><p><span>郵箱: </span>cykj789@sina.com</p><p><span>電話: </span>13558781838</p><p><span>傳真: </span>135_</p><p><span>網(wǎng)址: </span></p><p><span>手機(jī): </span>135-58781838</p><p><span>地址: </span>龍橋鎮(zhèn)山水村3組201號(hào)</p><p>[當(dāng)前離線] <a rel="nofollow"> [加為商友] </a><a rel="nofollow"> [發(fā)送信件] </a></p></div></div><div id="h32p3df" class="page-proshow02"><p class="title">詳細(xì)說明</p><div id="pjgdfwq" class="box"><p><p> 聚氨酯工業(yè)中主要使用的有機(jī)異氰酸酯，如TDI、MDI、HDI等均是采用胺成鹽二段光化反應(yīng)的歷程制備的，產(chǎn)品收率高、質(zhì)量好，但生產(chǎn)中使用的光氣是劇毒化學(xué)品，反應(yīng)生產(chǎn)的氯化氫是強(qiáng)腐蝕性化學(xué)品，因此對(duì)生產(chǎn)管理，宜賓巴斯夫異氰酸酯黑料、設(shè)備安全運(yùn)行和環(huán)境保護(hù)等都是嚴(yán)峻的挑戰(zhàn)。國(guó)外許多大公司，在生產(chǎn)有機(jī)異氰酸酯的過程，積累了大量有益的經(jīng)驗(yàn)，在設(shè)備的耐壓、防腐、連續(xù)自動(dòng)化控制、防泄漏、***預(yù)警和應(yīng)急處理、生產(chǎn)管理和設(shè)備管理等方面都制定了相應(yīng)的技術(shù)指標(biāo)和實(shí)施方法，以確保產(chǎn)品的正常生產(chǎn)。我國(guó)在引進(jìn)生產(chǎn)異氰酸酯生產(chǎn)裝置時(shí)，除應(yīng)注意引進(jìn)生產(chǎn)的“硬件”裝備外，還應(yīng)注意引進(jìn)相應(yīng)安全生產(chǎn)，宜賓巴斯夫異氰酸酯黑料、管理、控制等方面的“軟件”。利用胺的光氣化法這一原理，宜賓巴斯夫異氰酸酯黑料，還可以制備各種有機(jī)異氰酸酯。如生產(chǎn)酰氯異氰酸酯。異氰酸酯在適當(dāng)?shù)臈l件下還可以發(fā)生自聚反應(yīng)，形成二聚體或高分子量的聚合物。宜賓巴斯夫異氰酸酯黑料</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="宜賓巴斯夫異氰酸酯黑料,異氰酸酯" src="https://tyunfile.71360.com/UploadFile/cdcykj/637281754176621093/2041773.png"></div><p> .光氣法按生產(chǎn)工藝條件來分,光氣法可分為液相光氣法和氣相光氣法。(1)液相光氣法①液相成鹽光氣化法：胺類首先與HCl或CO2氣體形成相應(yīng)的鹽酸鹽或碳酸鹽,然后再與液相光氣反應(yīng)得到異氰酸酯。該技術(shù)的使用可在溫和的條件下(甚至是室溫)制得異氰酸酯,同時(shí)反應(yīng)收率較高,但缺點(diǎn)是反應(yīng)時(shí)間長(zhǎng)、所需溶劑量大、副產(chǎn)物多且難于分離。②液相直接光氣法：主要用于反應(yīng)活性低、沸點(diǎn)高、不易汽化的胺類化合物與光氣發(fā)生反應(yīng),是TDI、MDI等主流異氰酸酯產(chǎn)品所廣. 宜賓巴斯夫異氰酸酯黑料異氰酸酯膠不存在有害的游離甲醛，所以在刨花板工業(yè)中的應(yīng)用日益增多。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="宜賓巴斯夫異氰酸酯黑料,異氰酸酯" src="https://tyunfile.71360.com/UploadFile/cdcykj/637281753599755859/8927766.png"></div><p style="text-indent:25px">甲苯二異氰酸酯（TDI）為無(wú)色有強(qiáng)烈刺鼻味的液體，沸點(diǎn)251°C，比重1.22，遇光變黑，對(duì)皮膚、眼睛有強(qiáng)烈刺激作用，并可引起濕疹與支氣管***，主要用于聚氨酯泡沫塑料、涂料、合成橡膠、絕緣漆、粘合劑等。根據(jù)其成分，甲苯二異氰酸酯屬含氮基的有機(jī)化合物。二苯基甲烷二異氰酸酯（MDI）分為純MDI和粗MDI。純MDI常溫下為白色固體，加熱時(shí)有刺激臭味，沸點(diǎn)196°C，主要用于聚氨酯硬泡沫塑料、合成纖維、合成橡膠、合成革、粘合劑等。根據(jù)其成分，純二苯基甲烷二異氰酸酯也屬含氮基的有機(jī)化合物。還有非黃變型的1,6-己二異氰酸酯（HDI）。</p><p> 異氰酸酯中文別名:異氰酸二苯基甲烷異氰酸酯英文名稱:isocyanicacid。英文別名:Isocyanicacid;Hydrogenisocyanide;Polyisocyanates;CAS號(hào):75-13-8；分子式:CHNO;分子量:℃;閃點(diǎn):<-15℃(閉杯);自燃點(diǎn):534℃;蒸汽壓:6750mmHgat25°C;外觀:無(wú)色清亮液體,有強(qiáng)刺激性。溶解性:15℃時(shí)水中溶解度:1%;20℃時(shí)。用途:用于家電、汽車、建筑、鞋業(yè)、家具、膠粘劑等行業(yè)。危險(xiǎn)性:除不銹鋼、鎳、玻璃、陶瓷外其他材料與其接觸均有被腐蝕危險(xiǎn)。尤其不能使用鐵、鋼、鋅、錫、銅或其合金作為盛裝容器。化學(xué)反應(yīng):容易與包含有活潑氫原子的化合物:胺、水、醇、酸、堿發(fā)生反應(yīng)。 <p> <br /> </p> 燃燒時(shí)釋出MIC蒸氣、氮氧化物、一氧化碳和氰化氫。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="宜賓巴斯夫異氰酸酯黑料,異氰酸酯" src="https://tyunfile.71360.com/UploadFile/cdcykj/637281753986855468/1640013.png"></div><p> 目前，大規(guī)模工業(yè)化生產(chǎn)有機(jī)異氰酸酯主要使用的是胺的直接光氣化法。該法又稱為胺的兩段光氣化法，即將胺的光氣化反應(yīng)分為冷光氣化段和熱光氣化段。將胺化合物原料和光氣分別溶解在惰性溶劑中，如氯苯、二氯苯、甲苯、氯化萘、1，2，4-三氯苯等，并使它們?cè)?～70℃的低溫階段進(jìn)行反應(yīng)，在此階段，它們主要生成酰胺和胺的鹽酸鹽，以及少量的脲類化合物。其中式(3-1)、式(3-2)為主反應(yīng)，式(3-3)、式(3-4)為副反應(yīng)，尤其是式(3-4)，原料胺化合物與生成的異氰酸酯產(chǎn)物反應(yīng)對(duì)合成危害較大，它不僅使原料胺和光氣的消耗量增加，而且生成的脲類化合物會(huì)與光氣進(jìn)一步反應(yīng)生成焦油樹脂狀化合物，使系統(tǒng)中廢渣量增加，給反應(yīng)和工業(yè)處置造成一定困難。因此，要嚴(yán)格控制反應(yīng)溫度等工藝條件，同時(shí)，在工業(yè)上，通常是將氯化氫或二氧化碳通入溶于溶劑中的胺，使它預(yù)先生成胺的鹽酸鹽或胺的碳酸鹽，以減少不必要的副反應(yīng)產(chǎn)生。熱光氣化階段是使系統(tǒng)在80～200℃范圍內(nèi)逐漸升溫，并不斷通入光氣進(jìn)行反應(yīng)，使胺的鹽酸鹽、酰氯等中間體進(jìn)一步反應(yīng)轉(zhuǎn)化成有機(jī)異氰酸酯，基本反應(yīng)表示如下。用于家電、汽車、建筑、鞋業(yè)、家具、膠粘劑等行業(yè);甘肅外墻異氰酸酯涂層材料</p><p style="text-indent:25px">與水反應(yīng):與水反應(yīng)生成胺和二氧化碳，胺進(jìn)一步與異氰酸酯反應(yīng)生成取代脲。宜賓巴斯夫異氰酸酯黑料</p><p> 異氰酸酯固化劑：一般而言，電泳涂料的基料樹脂是相對(duì)分子質(zhì)量較小的熱固性樹脂，其單獨(dú)成膜時(shí)的漆膜性能很差，因此需采用交聯(lián)劑。交聯(lián)劑有封閉型異氰酸酯、氨基樹脂等。若用酚醛作為交聯(lián)劑，其耐侯性差。氨基樹脂是由含有氨基的化合物與甲醛經(jīng)縮聚而成的樹脂的總稱，根據(jù)采用的氨基化合物的不同可分為四類：脲醛樹脂、三聚氰胺樹脂、苯代三聚氰胺樹脂、共聚樹脂。通常用脲醛樹脂、六甲氧基甲基三聚氰胺樹脂等作為交聯(lián)劑。三聚氰胺樹脂的固化反應(yīng)是按照酸催化機(jī)理進(jìn)行的，在陰極電泳涂料涂膜固化過程中，由于涂膜內(nèi)尚有未中和的氨基存在，涂膜處在堿性條件下，其固化的速率將受到嚴(yán)重阻礙，固化時(shí)所需的烘烤溫度多在180度以上。宜賓巴斯夫異氰酸酯黑料</p></p><br /><p>文章來源地址: http://www.cdcfah.com/cp/2873313.html</p></div></div></div></div></div><div id="3pcegn8" class="page-right twoColRt"><div id="n8ua2mo" class="box01 margin10 clearfix"><h3><a href="http://www.cdcfah.com/cp/">猜你喜歡</a></h3><div id="rrrtli9" class="recomPic likePro"><a href="http://www.cdcfah.com/cp/814588.html"><div><img src="http://tyunfile.71360.com/UpLoadFile/2019/11/1/14/637082168864691056_lgpj_5374157.jpg" alt="福建ZF配件哪家強(qiáng) 信息推薦自業(yè)物資供應(yīng)" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></div><p>福建ZF配件哪家強(qiáng) 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