<menuitem id="8o5zl"><delect id="8o5zl"></delect></menuitem>
  • <wbr id="8o5zl"></wbr>

    <del id="8o5zl"><sup id="8o5zl"></sup></del>
    <ruby id="8o5zl"><font id="8o5zl"></font></ruby>
    <wbr id="8o5zl"><sup id="8o5zl"><style id="8o5zl"></style></sup></wbr>
    
    
        <tr id="8o5zl"><fieldset id="8o5zl"><nobr id="8o5zl"></nobr></fieldset></tr>
      1. 久久se精品一区二区三区,成全我在线观看免费第二季,成在人线av无码免费看网站直播,成人国产精品免费网站,久久精品亚洲精品国产区,极品人妻少妇一区二区三区,国产乱人伦真实精品视频,91精品91久久久久久

         

        1,4-Butanediol

        Update time:2021/11/05 13:14:11  ???View:  
        1,4-Butanediol (abbreviated as BDO) is an important organic and fine chemical raw material, it is widely used in the fields of medicine, chemical industry, textile, papermaking, automobile and daily chemical industry. BDO can produce tetrahydrofuran (THF), polybutylene terephthalate (PBT), gamma-butyrolactone (GBL) and polyurethane resin (PU Resin), coatings and plasticizers, etc., as well as solvents and electroplating Brighteners in the industry, etc.
         
        Nature
        Colorless viscous oily liquid. It is flammable, with a freezing point of 20.1°C and a refractive index of 1.4461. It is soluble in methanol, ethanol, acetone, and slightly soluble in ether. It is hygroscopic, has a bitter odor, and has a slightly sweet taste in the mouth.
         
        Use
        1,4 Butanediol is an important organic chemical and fine chemical raw material, and it is the basic raw material for the production of polybutylene terephthalate (PBT) engineering plastics and PBT fibers; PBT plastics are the five most promising ones. One of engineering plastics.
        1,4-Butanediol is the main raw material for the production of tetrahydrofuran, which is an important organic solvent. Polytetramethylene glycol ether (PTMEG) obtained after polymerization is the basic raw material for the production of highly elastic spandex (Lycra fiber). Spandex is mainly used to produce high-elastic knitwear such as high-grade sportswear and swimming suits.
        The downstream product of 1,4-butanediol, γ-butyrolactone, is the raw material for the production of 2-pyrrolidone and N-methylpyrrolidone products, from which a series of high value-added products such as vinylpyrrolidone and polyvinylpyrrolidone are derived. It is widely used in the fields of pesticides, medicine and cosmetics.
        ------分隔線----------------------------

        Service Hotline:

        You only need a phone call, we will serve you attentively

        Consult now
        Copyright © Shandong Zhengji Chemical Co., Ltd.  All Rights Reserved   Case Number :魯ICP備20007847號-4 chemBlink Premium Supplier
        主站蜘蛛池模板: 成年视频人免费网站动漫在线 | 亚洲无线码在线一区观看| 十八禁国产一区二区三区| 欧美色丁香| 国产欧美久久一区二区| 国产日韩一区二区在线看| 免费专区丝袜调教视频| 无码h片在线观看网站| 狠狠亚洲色一日本高清色| 疯狂做受xxxx高潮欧美日本| 国产亚洲精品aaaa片app| 国产精品中文一区二区| 久久精品国产久精国产一老狼| 国产精品内射在线免费看| 国产乱码日韩精品一区二区| 日韩高清亚洲日韩精品一区二区| 性色av免费观看| 麻豆a级片| 国产中文字幕精品在线| 深夜av免费在线观看| 国产区精品福利在线熟女| 麻豆精品久久久久久久99蜜桃| 亚洲精品国模一区二区| 国产福利姬喷水福利在线观看| 国产在线国偷精品产拍| 国产亚洲一级特黄大片在线| 久久五月丁香合缴情网| 艳妇乳肉豪妇荡乳xxx| 久久精品蜜芽亚洲国产av| 亚洲欧洲日产国码久在线| 日本一区二区精品色超碰| 日韩毛片在线视频x| 欧美日韩国产一区二区三区欧| 日本一区二区三区专线| 色秀网在线观看视频免费| 国产午夜福利在线机视频 | 亚洲欧美综合精品成人网站| 久久久久青草线蕉亚洲| 欧美精品V欧洲精品| 国产不卡精品视频男人的天堂| 亚洲国产成人久久精品不卡|