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clearfix"><h1>汕頭V388固化劑便宜歡迎來電江陰泉林化學(xué)品供應(yīng)</h1><div id="f3u2qmj" class="proBig"><div id="pj8zyhv" class="bigimg"><div><p class="pic"><img src="https://tyunfile.71360.com/WaterMark/UploadFile/Jyquanlin/637286280191572266/1979418.png" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div><div id="rlafr9p" class="smallimg"><div><p class="pic"><img src="https://tyunfile.71360.com/WaterMark/UploadFile/Jyquanlin/637286280191572266/1979418.png" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div></div><div id="mwf7bxz" class="content"><p><span>需求數(shù)量：</span>0</p><p><span>價格要求：</span>面議</p><p><span>所在地：</span>江蘇省</p><p><span>包裝要求：</span><span style="color: #f30;"></span></p><p><span>產(chǎn)品關(guān)鍵詞：</span>汕頭V388固化劑便宜,固化劑</p><p><span>***更新：</span>2020-07-09 05:28:55</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="8dr33kk" class="rightbox"><h3>公司基本資料信息</h3><p style="border:0;"><a rel="nofollow">江陰泉林化學(xué)品有限公司</a></p><p><span>聯(lián)系人：</span>葉奇</p><p><span>郵箱: </span>63173667@QQ.COM</p><p><span>電話: </span>13861290603</p><p><span>傳真: </span>0510_</p><p><span>網(wǎng)址: </span></p><p><span>手機(jī): </span>0510-86658688</p><p><span>地址: </span>常澄路1號16樓1617-1620</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="im3dnmt" class="page-proshow02"><p class="title">詳細(xì)說明</p><div id="fuosj92" class="box"><p><p> 不飽和聚酯樹脂作為復(fù)合材料，在涂料、玻璃鋼、人造石、工藝品等領(lǐng)域，都已經(jīng)得到了較好的應(yīng)用。但不飽和樹脂的顏色黃變，一直是一個困擾生產(chǎn)廠家的問題。通常不飽和樹脂的黃變原因包括以下幾種： </p> <p> 1、不飽和樹脂酯化合成過程中，汕頭V388固化劑便宜，由于高溫引起的熱老化黃變，不飽和樹脂一般酯化溫度，為180～220℃甚至更高，汕頭V388固化劑便宜，在此溫度下樹脂很容易因熱老化而變黃，影響樹脂產(chǎn)品外觀； </p> <p> 2、樹脂接觸紫外線而引起的黃變，主要因素是樹脂中存在的苯環(huán)(包括芳香族二元酸/酐和苯乙烯引入的苯環(huán))，原因可能是芳香族化合物在高溫時發(fā)生熱氧降解，容易發(fā)生π→π軌道上的電子躍遷，使樹脂呈現(xiàn)黃色； </p> <p> 3、樹脂生產(chǎn)過程中，汕頭V388固化劑便宜，因裝置密封性不好等原因使原料接觸氧氣，通用不飽和聚酯分子鏈中不僅含有酯基、羥基、羧基，而且含有雙鍵和芳香環(huán)，微量氧能使其發(fā)生熱氧化降解，**明顯的表現(xiàn)就是樹脂顏色變黃。 </p> <p> 4、添加劑的影響如抗氧劑、阻聚劑、固化劑等，胺類抗氧劑易轉(zhuǎn)變成氮氧自由基而使制品著色，常用的阻聚劑，如對苯二酚，在微量氧存在時氧化為醌類，醌類本身帶有顏色，從而影響樹脂的顏色，固化劑有些廠家仍采用過氧化酰類-叔胺體系和過氧化酮類-金屬皂體系，由于叔胺和金屬皂都有顏色，容易使樹脂著色。 </p> <p> <br /> 一般促進(jìn)劑與固化劑（過氧化物）的摩爾比必須小于 1這種情況只有在選擇鈷鹽作為促進(jìn)劑的情況下才能計算出。汕頭V388固化劑便宜</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="汕頭V388固化劑便宜,固化劑" src="https://tyunfile.71360.com/WaterMark/UploadFile/Jyquanlin/637286280191572266/1979418.png"></div><p> 樹脂中阻聚劑等其它添加劑的影響 </p> <p> 在保存未固化的液體 UPR 時，要加入阻聚劑，使 UPR 商品在貯存過程中免于過早膠凝變質(zhì)。引發(fā)劑和促進(jìn)劑反應(yīng)釋放出的游離基，一開始是被阻聚劑消耗掉，阻聚劑變?yōu)榉€(wěn)定的大分子失去阻聚能力。因此，低反應(yīng)活性的樹脂有可能因?yàn)槠渲屑尤氲淖杈蹌┝亢苌俣@得反應(yīng)活性很高，而高反應(yīng)活性的樹脂也可能因其中加入了較大量的阻聚劑變得不甚活潑。另外樹脂中的填料、色漿、低收縮添加劑等也會影響樹脂的固化程度。 **固化劑單價硬化階段（B 階段）：從樹脂凝膠以后算起，直到變成具有足夠硬度，達(dá)到基本不粘手狀態(tài)的階段。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="汕頭V388固化劑便宜,固化劑" src="https://tyunfile.71360.com/WaterMark/UploadFile/Jyquanlin/637286280245830078/9671124.png"></div><p> 一般促進(jìn)劑與固化劑（過氧化物）的摩爾比必須小于 1，（這種情況只有在選擇鈷鹽作為促進(jìn)劑的情況下才能計算出），否則促進(jìn)劑與初級游離基的逆反速度會大于初級游離基引發(fā)單體的速度，結(jié)果使轉(zhuǎn)化率下降。因此過多地使用促進(jìn)劑并不能達(dá)到加速固化的效果，反而會使產(chǎn)品性能下降。 </p> <p> 對于低反應(yīng)活性的不飽和聚酯樹脂的固化宜選用低活性的固化系統(tǒng)。 </p> <p> 低溫或高濕度的不利的固化條件下，可采用復(fù)合固化系統(tǒng)： </p> <p> 過氧化甲乙酮 1% </p> <p> N，N-二甲基苯胺 0.5% </p> <p> 過氧化苯甲酰 2% </p><p> 過氧化環(huán)己酮（是多種氫過氧化物的混合物） </p> <p> 其中以第（Ⅰ）種結(jié)構(gòu)為主。 </p> <p> 過氧化環(huán)己酮溶解在二丁酯中，成為 50%的糊狀物，稱為 1#固化劑。 <p> <p> 過氧化二苯甲酰（是一種過氧化物，簡稱 BPO） </p> <p> 過氧化二苯甲酰溶解在二丁酯中，成為 50%的糊狀物，稱為 2#固化劑 <p> 過氧化甲乙酮（簡稱 MEKP） </p> <p> 這是一種液態(tài)固化劑，一般配成有效成份為 50%的二甲酯溶液，就是市售的 5#固化劑。 </p> <p> 在有效成份中，同樣，不是單一化合物，而是由多種分子結(jié)構(gòu)的氫過氧化物的混合物： </p> </p> <p> <br /> </p> </p> <p> <br /> </p> </p> <p> <br /> </p> <p> <br /> 但是放熱的速度及由此而引起的溫度上升速度和體系所能達(dá)到的比較高放熱峰溫度則取決UPR 混合物的形狀與尺寸。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="汕頭V388固化劑便宜,固化劑" src="https://tyunfile.71360.com/WaterMark/UploadFile/Jyquanlin/637286280330771484/890705.png"></div><p> 環(huán)氧樹脂本身是一個線性結(jié)構(gòu)的化合物，性能很穩(wěn)定，必須與固化劑一塊使用才能具有實(shí)用價值。因此固化劑是環(huán)氧樹脂在使用過程中必不可少的重要組成部分。環(huán)氧樹脂的固化劑種類很多，常見的有: </p> <p> 脂肪胺類 </p> <p> 脂環(huán)胺類 </p> <p> 芳香胺類 </p> <p> 酸酐 </p> <p> 聚酰胺類 </p> <p> 改性胺類 </p> <p> 潛伏性類 </p> <p> 樹脂類 </p> <p> 叔胺類。 </p> <p> 固化促進(jìn)劑的種類及其所適用的固化劑 </p> <p> 由于固化劑的不同會直接影響制品的工藝過程及制品的物理化學(xué)性能，所以根據(jù)應(yīng)用的場合來加以選擇這些環(huán)氧樹脂固化劑是十分重要的。如固化工藝是常溫固化還是加溫固化？制品要求是硬質(zhì)的還是軟質(zhì)的？是要求耐高溫的還是低溫的？使用環(huán)境是潮濕的還是干燥的？不同的場合使用的固化劑有所不同?？傊鶕?jù)實(shí)際情況選擇合適的固化劑，以便發(fā)揮出所用環(huán)氧樹脂體系的比較好的性能由線型長鏈分子形成三維立體網(wǎng)絡(luò)結(jié)構(gòu)的過程。**固化劑單價</p><p style="text-indent:25px">在同樣成分下，大制件相對小制件熱損失少，溫升就較高。汕頭V388固化劑便宜</p><p> 二氨甲基環(huán)已烷 1。3 BAC C260 （H2NCH2）2C6H8 棕色液體每100份標(biāo)準(zhǔn)樹脂用18份該環(huán)狀多元胺在常溫下不能完全固化，需進(jìn)行后固化80-150℃，得HDT達(dá)150℃左右。常需加促進(jìn)劑：叔胺、亞磷酸三苯酯、水楊酸、甲酚等。 </p> <p> 孟烷二胺 MDA （CH3）（H2N）C6H8 C（CH3）2NH2 分子量169 活潑氫當(dāng)量42.2 淺黃色液體每100份標(biāo)準(zhǔn)樹脂用6-22份加溫固化 80-130℃ 2小時-30分鐘適用期50克25℃長8-16小時。熱變形溫度148-158℃抗彎強(qiáng)度1050-1190kg/cm2，抗壓強(qiáng)度710kg/cm2，抗拉強(qiáng)度610kg/cm2，伸長率2.9%，沖擊強(qiáng)度 0.4尺-磅/寸洛氏硬度105。粘度低、適用期長。加熱迅速固化，毒性小。 </p> <p> <br /> 汕頭V388固化劑便宜</p><p style="text-indent:25px">江陰泉林化學(xué)品有限公司注冊資金200-300萬元，是一家擁有5~10人***員工的企業(yè)。江陰泉林致力于為客戶提供質(zhì)量的[ "不飽和聚酯樹脂不飽和樹脂", "乙烯基樹脂，樹脂，膠衣", "玻璃纖維紗，玻璃纖維布", "固化劑促進(jìn)劑，環(huán)氧固化劑" ]，一切以用戶需求為中心,深受廣大客戶的歡迎。公司注重以質(zhì)量為中心，以服務(wù)為理念，秉持誠信為本的理念，打造化工質(zhì)量品牌。公司自成立以來發(fā)展迅速，業(yè)務(wù)不斷發(fā)展壯大，年?duì)I業(yè)額度達(dá)到1000-2000萬元，未來我們將不斷進(jìn)行創(chuàng)新和改進(jìn)，讓企業(yè)發(fā)展再上新高。</p></p><br /><p>文章來源地址: http://www.cdcfah.com/cp/543326.html</p></div></div></div></div></div><div id="vew98dz" class="page-right twoColRt"><div id="qf8bnx7" class="box01 margin10 clearfix"><h3><a 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