亚洲尤码不卡av麻豆,日韩精品人妻系列无码专区免费,男女啪动最猛动态图,欧美成人精品第一区

Welcome to Shanghai Yixiang Chemical Co., Ltd technology website, 0086-532-66721921

SERVICE HOTLINE:

0086-532-66721921

Shanghai Yixiang Chemical Co., Ltd

QQ:3572534783

Tel:0086-532-66721921

E-mail:market@yx-pvp.com

Add:Room J3681, No. 500, Xincheng Road,

Jiading District, Shanghai,China

What chemical reagent is pvp

Release Date:2022-11-01

Pvp is a polyvinylpyrrolidone chemical reagent. Polyvinylpyrrolidone (PVP) is a non-ionic polymer compound. PVP is made from vinyl pyrrolidone (NVP) monomer by bulk polymerization, solution polymerization and other methods.

There are two main polymerization routes for PVP production. The first is solution polymerization of N-2-pyrrolidone (NVP) in organic solvent, and then steam stripping. The second route is aqueous solution polymerization of NVP monomer and water-soluble cationic, anionic or non-ionic monomer.

Physical and chemical properties

1. Density: 1.144g/cm3

2. Boiling point: 217.6 ° C

3. Melting point: 130 ° C

4. Flash point: 93.9 ° C

5. Average molecular weight: 8000-700000

6. Stability: stable under normal temperature and pressure

7. Solubility: It is extremely soluble in water and halogenated hydrocarbon solvents, alcohols, amines, nitroalkanes and low molecular weight fatty acids, but insoluble in acetone, ether, turpentine, aliphatic hydrocarbons and alicyclic hydrocarbons. It is compatible with most inorganic acid salts and various resins.

8. Properties: It is a white or nearly white powder with hydrophilic property and easy to flow, with slight odor.

Cross linked homopolymer of pure vinyl pyrrolidone. It is capable of complexing polyvinyl pyrrolidone (PVP) with a variety of substances (such as various clathrates that cause wine and other drinks to change color). It is easy to be removed after filtration due to its insolubility.


Online Service
Contact us

Hot Tel

0086-532-66721921

Work Shift

from Monday to Friday

QR code
Service
中文字幕影片免费在线观看| 免费特级毛片| 亚洲av综合色区| 国产精品中文久久久久久久| 色婷婷一区二区三区四区成人网 | 久久无码av三级| 国产男小鲜肉同志免费| 无码人妻aⅴ一区二区三区| 精品人无码一区二区三区| 蜜桃视频一区二区三区在线观看| 亚洲精品无码久久久久av麻豆| 国产内射爽爽大片| 看全色黄大色大片免费久久| 偷国产乱人伦偷精品视频| 亚洲精品无码久久久久av麻豆| 性欧美丰满熟妇xxxx性久久久| 亚洲永久精品ww47| 色欲av永久无码精品无码蜜桃| 亚洲国产精品一区第二页| 国产成年无码久久久久下载 | 国产伦精品一区二区三区免.费| 国产成人a亚洲精v品无码| 国产98在线 | 免费| 手机看片福利一区二区三区| 黑人玩弄人妻中文在线| 少妇人妻偷人精品无码视频| 午夜性刺激免费看视频| 亚洲永久精品ww47| 日本丰满少妇裸体自慰| 欧美成人aaa片一区国产精品| 国产后入又长又硬| 熟妇人妻无码中文字幕| 欧美白人战黑吊| 欧洲乱码伦视频免费| 爆乳女仆高潮在线观看| 第一次挺进莹莹的身体里视频 | 无码熟熟妇丰满人妻啪啪| 无码人妻精品一区二区| 一个人看的视频www免费| 亚洲中文字幕久久无码| 无码av专区丝袜专区|