中文字幕第二页-日韩欧美三级-黄色在线视频网站-黄色xxxxx-国产网站视频-自拍三级-日韩欧美久久久-天天燥日日燥-色播激情网-啪啪激情网-色综合天天干-激情五月色播五月-一级黄色短视频-国产艳俗歌舞表演hd-欧美巨乳在线观看

 

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: 美女一级黄| 人人91| 国产一二 | aaa一区二区 | 精品人妻aV中文字幕乱码色欲 | 狠狠操在线观看 | 97青草 | 香蕉视频免费看 | 人人人插| 奇米狠狠去啦 | 成片免费观看 | 黄色一级片国产 | 免费在线看污 | 九九少妇| 蜜桃91丨九色丨蝌蚪91桃色 | 欧美色射 | 黄色福利网 | 老鸭窝视频在线观看 | a毛片毛片av永久免费 | 夜间福利网站 | 欧美日本亚洲 | 熟妇人妻系列aⅴ无码专区友真希 | 精品国产va久久久久久久 | 最新日韩av在线 | 干干干操操操 | 今天高清视频在线观看视频 | 天天拍夜夜操 | 亚洲久久综合 | 办公室大战高跟丝袜秘书经理ol | bl无遮挡高h动漫 | 日韩视频在线一区 | 三上悠亚在线一区二区 | 精品人妻aV中文字幕乱码色欲 | 九色视频偷拍少妇的秘密 | 日本三级网站在线观看 | 快播91| 仙踪林久久久久久久999 | 亚洲丁香婷婷 | 国产三级精品在线观看 | 337p粉嫩大胆色噜噜噜 | 精品乱子伦一区二区 | 网站一级片| 色偷偷网站 | 夜夜嗨国产 | 国产毛片毛片 | 黄色三级网| 国模小黎自慰gogo人体 | 国产婷婷色一区二区在线观看 | 亚洲天堂日韩av | 性生交大片免费看狂欲 | 久久婷婷一区 | 4438五月天 | 日韩视频播放 | 日韩一区在线视频 | 久久久噜噜噜久久中文字幕色伊伊 | 天天干夜夜艹 | 国产精品久久久久9999 | 最新99热 | 四虎国产精品免费 | 亚洲欧美综合另类 | 国产精品久久无码一三区 | 免费观看在线观看 | 综合五月激情 | 色噜噜狠狠狠综合曰曰曰 | 美女超碰| 日本美女在线 | 亚洲九九九九 | 欧美第五页 | 91激情| 精品人妻一区二区三区蜜桃视频 | 欧美二级片 | 在线免费国产 | 久久av影视 | 亚洲一二三精品 | 伊人成人在线观看 | 午夜免费播放观看在线视频 | 亚洲在线视频一区 | 肉色超薄丝袜脚交69xx | 久久免费大片 | 成人区人妻精品一区二 | 免费国产视频 | 亚洲性网站 | 色黄视频在线观看 | 九九久久99 | 黄色小说在线观看视频 | 老牛影视av老牛影视av | 神宫寺奈绪一区二区三区 | 成人黄色网页 | 久久综合伊人77777蜜臀 | 久热这里只有精品6 | 亚洲精品美女久久久 | 少妇精品高潮欲妇又嫩中文字幕 | 妖精视频在线观看 | 中文字幕3| 日韩成人性视频 | 波多野结衣免费在线视频 | 久久久久久久久黄色 | 国产精品久久久久国产a级 91香蕉视频黄色 | 小妹色播影院 |