IṢẸ́ ỌNÀ
ẸWÀ ÀTI ÌLERA
IṢẸ́ ỌWỌ́
ÀṢÀ ÀTI ÌTÀN
ÌṢERÉ
ÀYÍKÁ
OÚNJẸ ÀTI OHUN MÍMU
REVERSE ENGINEERING
SÁYẸ́ǸSÌ
ERÉ ÌDÁRAYÁ
ÌMỌ̀-Ẹ̀RỌ
ÀWỌN OHUN WÍWỌ̀
Youblob · CC0
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.
Ilọsíwájú
2 days
Ìlànà
1
1
Make the 10 % potash
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.
Àwọn ohun èlò fún ìgbésẹ̀ yìí:
Hidiroksidi potasiomu0.5 parts
Omi4.5 partsÀwọn irinṣẹ́ tí a nílò:
Ohun èlò dígí
Òǹwọ̀n ìdọ́gba2
2
Heat D4 with the potash under nitrogen
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.
Àwọn ohun èlò fún ìgbésẹ̀ yìí:
Octamethylcyclotetrasiloxane (D4)5000 partsÀwọn irinṣẹ́ tí a nílò:
Ìgò Gíláàsì Ìsàn
Pátákó Gbígbóná
Ẹ̀rọ Ìwọ̀n Ooru
Ohun ìrúwé
Sílíńdà Gáàsì Nàìtírójìn3
3
Add water a little at a time
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.
Àwọn ohun èlò fún ìgbésẹ̀ yìí:
Omi16.5 partsÀwọn irinṣẹ́ tí a nílò:
Ìgò Gíláàsì ÌsànPátákó GbígbónáẸ̀rọ Ìwọ̀n OoruOhun ìrúwé4
4
Cool, then neutralise with silica
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.
Àwọn ohun èlò fún ìgbésẹ̀ yìí:
Silica tí a rọ̀ sílẹ̀50 partsÀwọn irinṣẹ́ tí a nílò:
Ìgò Gíláàsì ÌsànOhun ìrúwé5
5
Strip the volatiles at 195–200 °C
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.
Àwọn irinṣẹ́ tí a nílò:
Ìgò Gíláàsì Ìsàn
Ìyípo ẹ̀rọ ìtutùPátákó GbígbónáẸ̀rọ Ìwọ̀n OoruSílíńdà Gáàsì Nàìtírójìn
Ìgò Gílásì OnídìíÀwọn ohun-èlò
4- 0.5 partsÀyè
- 21 partsÀyè
- 5000 partsÀyè
- 50 partsÀyè
Ìtọ́nisọ́nà yìí ń ṣe
Blueprint tó jọra
Àwọn blueprint wọ̀nyí pín ìmọ̀ — ọ̀nà, ohun-èlò tàbí ìlànà
CC0 Àgbègbè Gbogbogbò
Blueprint yìí ti jáde lábẹ́ CC0. O lè ṣe àdàkọ, yí padà, pín, àti lò láìsí ìyọ̀ǹda.
Ṣàtìlẹ́yìn Olùṣẹ́dá nípa rírà àwọn ọjà nipasẹ̀ Blueprint wọn Ẹ̀san Olùṣẹ́dá tí àwọn Olùtajà gbé kalẹ̀, tàbí ṣẹ̀dá àtúnṣe tuntun ti Blueprint yìí kí o sì fi sínú Blueprint rẹ gẹ́gẹ́ bí ìsopọ̀ láti pín owó-wíwọlé.