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Thread Locker: Tetraethylene Glycol Dimethacrylate with Cumene Hydroperoxide, Set When Air Is Shut Out (Krieble, US 2,895,950)
Paul Breen (Wikimedia Commons) · CC BY-SA 4.0
Charlie

Imeundwa na

Charlie

2. Novemba 2026DE
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Thread Locker: Tetraethylene Glycol Dimethacrylate with Cumene Hydroperoxide, Set When Air Is Shut Out (Krieble, US 2,895,950)

An anaerobic thread locker. A little cumene hydroperoxide stirred into tetraethylene glycol dimethacrylate stays liquid as long as air reaches it. Shut between threads or plates, away from air, it sets into a tough resin and locks them. Result: a liquid that keeps a year or more in a half-full bottle and locks steel in 40 minutes to 5 hours, depending on how much catalyst it holds. Heat speeds it up. Source: V. K. Krieble (American Sealants Company), US 2,895,950 (1959), Example 1. Unknown: how the tetraethylene glycol dimethacrylate is made; the patent uses a bought commercial grade. Not given: bond strength. Picture: Wikimedia Commons.
Mwanzo
2 hours

Maagizo

1

Mix in the catalyst

At room temperature, stir cumene hydroperoxide into commercial-grade tetraethylene glycol dimethacrylate, measuring by volume. Anything from 0.1 to 10 % works; the patent prefers 2 to 10 %. Goggles and gloves: cumene hydroperoxide is an organic peroxide, keep it cool.

Vifaa kwa hatua hii:

Tetraethilini glikoli dimethakrilatiTetraethilini glikoli dimethakrilati100 parts by volume
Haidroperoksidi ya kuminiHaidroperoksidi ya kumini5 parts by volume (0.1-10)

Zana zinazohitajika:

Silinda ya kupimiaSilinda ya kupimia
Fimbo ya KukorogaFimbo ya Kukoroga
Miwani ya usalama iliyofungwaMiwani ya usalama iliyofungwa
Glavu zinazostahimili kemikaliGlavu zinazostahimili kemikali
2

Store it with air

Keep the mixture in a container with air space, preferably polyethylene, which lets air through. Bottles stored half full stayed liquid for a year or more at room temperature.

Zana zinazohitajika:

Chupa ya plastikiChupa ya plastiki
3

Apply to the threads

Put a few drops on the threads before joining the parts. Once air is shut out it sets. Average set times between steel plates at 25-27 °C, by catalyst share: 10 %, 42 min; 5 %, 52 min; 2 1/2 %, 74 min; 1 1/4 %, 84 min. With 0.1 % it takes about five hours.

Zana zinazohitajika:

Seti ya Pipeti na KidondoshiSeti ya Pipeti na Kidondoshi
4

Speed it up with heat

Heat sets it faster: the 0.1 % mixture between glass slides, warmed to 100 °C over a steam bath, locked them in five minutes. Ours: a water bath over a burner as the steam bath.

Zana zinazohitajika:

Bafu la MajiBafu la Maji
Kichomeo cha BunsenKichomeo cha Bunsen

Vifaa

2

Zana Zinazohitajika

8

Mchoro huu unatengeneza

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Kishikilia nafasi

Gundi ya kufunga nyuzi

Free

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Blueprint zinazohusiana

Blueprint hizi zinashiriki maarifa — mbinu, vifaa au kanuni

Cumene Hydroperoxide: Air Blown through Cumene at 110 °C
Hatari

Cumene Hydroperoxide: Air Blown through Cumene at 110 °C

na CharlieDE

Viwandani

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