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Silicone Rubber Compound: Dimethyl Silicone Oil Gelled with Ferric Oxide, Agens 1948
Mary

Yenziwe ngu-

Mary

17. uMfumfu 2026FI
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Silicone Rubber Compound: Dimethyl Silicone Oil Gelled with Ferric Oxide, Agens 1948

Dimethyl silicone oil mixed with three-quarters its weight of red ferric oxide and a little aluminium chloride, heated to 130 °C, thins and then sets to a solid mass; milled on warm rubber rolls it becomes a silicone rubber compound ready to mould or extrude (Agens, General Electric, US 2,448,756, 1948). Cured, it stretches over 100 % and stays flexible at −60 °C. The picture: our drawing of the beaker, the mill and the sheet.
Osezingeni eliphezulu
A day

Imiyalelo

1

Weigh the mix

To 400 g silicone oil add 300 g ferric oxide (75 % of the oil) and 5 g anhydrous aluminium chloride (1.25 %). Stir it smooth. Keep the chloride dry; it fumes in damp air.

Izinto zokwakha zalesi sinyathelo:

Uwoyela we-dimethyl siliconeUwoyela we-dimethyl silicone400 g
Uthuli olubomvu olucolekileyo lokupholishaUthuli olubomvu olucolekileyo lokupholisha300 g

Amathuluzi adingekayo:

I-aluminium chloride (engenamanzi)I-aluminium chloride (engenamanzi)
Ibhikha Le-borosilicateIbhikha Le-borosilicate
IsigovuziIsigovuzi
Isikali Sedijithali SasekhishiniIsikali Sedijithali Sasekhishini
Amagilavu erabhaAmagilavu erabha
2

Heat to 130 °C

Heat the mix to 130 °C. It first gets thinner, then thickens fast until the whole mass is solid.

Amathuluzi adingekayo:

Ipuleti ElishisayoIpuleti Elishisayo
IthemomithaIthemomitha
Ibhikha Le-borosilicateIbhikha Le-borosilicate
3

Mill and sheet

Work the mass on rubber rolls at 125 °C for about half an hour and take it off as a sheet. This is the compound.

Amathuluzi adingekayo:

Umshini wenjoloba onama-roller amabiliUmshini wenjoloba onama-roller amabili
IthemomithaIthemomitha
4

Test a piece

Agens's test: press a sheet about 1.3 mm thick between platens at 150 °C for ten minutes, then 15 minutes in an oven at 200 °C. It should stretch over twice its length.

Amathuluzi adingekayo:

Umshini wokucindezela oshisayoUmshini wokucindezela oshisayo
Isithando sokuthambisa insimbiIsithando sokuthambisa insimbi
5

The mix

Ilayisha incwadi ye-Jupyter…

Izinto

2

Amathuluzi Adingekayo

10

Le blueprint yenza

Thumbnail
Isibambeli

Inhlanganisela yenjoloba ye-silicone

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Ama-blueprint ahlobene

Lama-blueprint abelana ngolwazi — amasu, izinto noma izimiso

Dimethyl Silicone Oil: Dimethyldichlorosilane Hydrolysed in Dilute Hydrochloric Acid, Agens 1948
Yingozi

Dimethyl Silicone Oil: Dimethyldichlorosilane Hydrolysed in Dilute Hydrochloric Acid, Agens 1948

ngu-CharlieDE

Polymer

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Natural Rubber Tubing, Bands and Sheet: Sulfur-Cured with Heat

Natural Rubber Tubing, Bands and Sheet: Sulfur-Cured with Heat

ngu-MaryFI

Amakhemikhali

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