Uretanlar
Uretanlar (frans. urethane, lot. urea— mochevina va ether — efir), karbamatlar — karbamin kislota efirlari. Umumiy formulasi NH2COOR (bu yerda R — metil, etil yoki b. organik radikal); rangsiz kristall moddalar: meti l u retan (suyuqlanish temperaturasi 52°, kaynash temperaturasi 177°), etiluretan (suyuqlanish temperaturasi 49°, kaynash temperaturasi 184°). Organik erituvchilarda erimaydi, suvda yaxshi eriydi. Ishkrrlar va konsentrlangan kislotalar taʼsirida parchalanadi. Ammiak bilan mochevina hosil qiladi. Poliuretanlar sintezida, gerbitsid va insektitsid sifatida qoʻllanadi; baʼzi U. (mas, etiluretan) — tinchlantiruvchi va uxlatuvchi modda.
 | Ushbu maqolada Oʻzbekiston milliy ensiklopediyasi (2000-2005) maʼlumotlaridan foydalanilgan. |
 | Ushbu maqola chaladir. Siz uni boyitib, Vikipediyaga yordam berishingiz mumkin. Bu andozani aniqrogʻiga almashtirish kerak. |
Content Disclaimer
Informasi ini disarikan dari Wikipedia dan disajikan kembali untuk tujuan edukasi. Konten tersedia di bawah lisensi CC BY-SA 3.0. Kami tidak bertanggung jawab atas ketidakakuratan data yang bersumber dari kontribusi publik tersebut.
- The information displayed on this website is sourced in part or in whole from Wikipedia and has been adapted for the purpose of restating it. We strive to provide accurate and relevant information, however:
- There is no guarantee of absolute accuracy. Wikipedia is an open, collaborative project that can be edited by anyone, so information is subject to change.
- It is not intended to constitute professional advice. The content displayed is for informational and educational purposes only. For important decisions (e.g., medical, legal, or financial), please consult a professional.
- Content copyright. Wikipedia is licensed under the Creative Commons Attribution-ShareAlike License (CC BY-SA). This means that content may be reused with appropriate attribution and shared under a similar license.
- Responsible use. Any risk arising from the use of information from this website is entirely the responsibility of the user.