Kerjasama
SENI
KECANTIKAN & KESEJAHTERAAN
KRAFTANGAN
BUDAYA & SEJARAH
HIBURAN
ALAM SEKITAR
MAKANAN & MINUMAN
KEJURUTERAAN TERBALIK
SAINS
SUKAN
TEKNOLOGI
BOLEH PAKAI
Hydroxyl-Ended Silicone Oil: D4 Opened with Potash, Then Water (Ceyzeriat 1964)
Youblob · CC0
Charlie

Dicipta oleh

Charlie

27. Oktober 2026DE
14
0
0
0
0

Hydroxyl-Ended Silicone Oil: D4 Opened with Potash, Then Water (Ceyzeriat 1964)

A trace of hot potash opens the ring of D4 and strings it into a long, thick chain. Water added a little at a time then cuts the chains back and leaves hydroxyl groups on their ends, which is what later lets the oil cure into rubber. This is Louis Ceyzeriat's oil A, the base of every sealant in his patent: 21,000 centistokes, 0.15 % hydroxyl. Source: L. Ceyzeriat (Rhône-Poulenc), US 3,133,891 (1964), column 4. His neutraliser was the precipitated silica Hi-Sil X303; we use our precipitated silica in its place. The potash mix and the equipment are ours. Picture drawn by Youblob.
Lanjutan
2 days

Arahan

1

Make the 10 % potash

Dissolve 0.5 part of potassium hydroxide in 4.5 parts of water (our arithmetic for 5 parts of a 10 % solution). All parts are by weight.

Bahan untuk langkah ini:

Kalium hidroksidaKalium hidroksida0.5 parts
AirAir4.5 parts

Alatan diperlukan:

Bekas kacaBekas kaca
Neraca dua piringNeraca dua piring
2

Heat D4 with the potash under nitrogen

Heat 5000 parts of octamethylcyclotetrasiloxane (it melts at 17.5 °C) with the 5 parts of 10 % potash at 150 °C for 3½ hours under nitrogen. The oil thickens to 31,000 centistokes while hot.

Bahan untuk langkah ini:

Oktametilsiklotetrasiloksana (D4)Oktametilsiklotetrasiloksana (D4)5000 parts

Alatan diperlukan:

Kelalang Penyulingan KacaKelalang Penyulingan Kaca
Plat PemanasPlat Pemanas
TermometerTermometer
PengacauPengacau
Silinder Gas NitrogenSilinder Gas Nitrogen
3

Add water a little at a time

Still hot, add 16.5 parts of water in small portions over 3 hours 40 minutes. The hot oil thins to 1730 centistokes.

Bahan untuk langkah ini:

AirAir16.5 parts

Alatan diperlukan:

Kelalang Penyulingan KacaKelalang Penyulingan Kaca
Plat PemanasPlat Pemanas
TermometerTermometer
PengacauPengacau
4

Cool, then neutralise with silica

Let it cool for 15 hours. Then stir in 50 parts of precipitated silica to neutralise the potash. The liquid now measures 13,400 centistokes at 25 °C.

Bahan untuk langkah ini:

Silika termendakSilika termendak50 parts

Alatan diperlukan:

Kelalang Penyulingan KacaKelalang Penyulingan Kaca
PengacauPengacau
5

Strip the volatiles at 195–200 °C

Heat it to about 195–200 °C in a current of nitrogen, with a water condenser on the outlet. 655 parts of liquid distil over; 4345 parts of oil A stay in the boiler, 21,000 centistokes at 25 °C with 0.15 % hydroxyl groups.

Alatan diperlukan:

Kelalang Penyulingan KacaKelalang Penyulingan Kaca
Gegelung kondenserGegelung kondenser
Plat PemanasPlat Pemanas
TermometerTermometer
Silinder Gas NitrogenSilinder Gas Nitrogen
Balang Kaca BertutupBalang Kaca Bertutup

Bahan

4

Alatan Diperlukan

9

CC0 Domain Awam

Blueprint ini dikeluarkan di bawah CC0. Anda bebas menyalin, mengubah, mengedar, dan menggunakan karya ini untuk sebarang tujuan, tanpa meminta kebenaran.

Sokong Pembuat dengan membeli produk melalui Blueprint mereka di mana mereka memperoleh Komisen Pembuat ditetapkan oleh Penjual, atau cipta iterasi baru Blueprint ini dan sertakan ia sebagai sambungan dalam Blueprint anda sendiri untuk berkongsi hasil.

Perbincangan

(0)

Log masuk untuk menyertai perbincangan

Memuatkan komen...