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Extruded Polystyrene Foam: Butylene-Blown Logs 20 Inches Across (McIntire, Dow 1948, Ex. 4)
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Charlie

28. Oktoba 2026DE
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Extruded Polystyrene Foam: Butylene-Blown Logs 20 Inches Across (McIntire, Dow 1948, Ex. 4)

Extruded polystyrene foam blown with a butylene gas fraction. 300 lb of polystyrene and about 130 lb of the fraction stand two days at 110 °C under 265 psi. Opened again and again, the tower let out foam logs 20 inches across and 20 feet long, weighing only 0.8 lb per cubic foot. Unknown: a source for the butylene fraction, linked to an unknown head. Source: O. R. McIntire (Dow), US 2,450,436 (1948), Example 4. Picture: the patent's drawing.
Juu
3 days

Maagizo

1

Charge the tower with polystyrene

Charge a high-pressure tower with 300 lb of granular polystyrene.

Vifaa kwa hatua hii:

PolistiriniPolistirini300 paundi

Zana zinazohitajika:

Riakta ya shinikizoRiakta ya shinikizo
Mizani ya mizani-mbiliMizani ya mizani-mbili
Glavu za mpiraGlavu za mpira
2

Add the butylene fraction

Add about 130 lb of a cracked-oil gas fraction that is about 87 % normal butylenes, with some butanes and butadiene, under pressure. Unknown: a source for this fraction. Flammable gas: no flames, strong ventilation.

Vifaa kwa hatua hii:

Sehemu ya gesi ya kupasua yenye butileniSehemu ya gesi ya kupasua yenye butileni130 paundi

Zana zinazohitajika:

Mtungi wa gesi yenye shinikizoMtungi wa gesi yenye shinikizo
Riakta ya shinikizoRiakta ya shinikizo
Miwani ya kinga dhidi ya kemikaliMiwani ya kinga dhidi ya kemikali
3

Heat two days at 110 °C

Close the tower and heat it at 110 °C for two days. The gauge pressure stays at 265 psi.

Zana zinazohitajika:

Riakta ya shinikizoRiakta ya shinikizo
Kipimajoto cha maabaraKipimajoto cha maabara
4

Let out logs through a 3.25 inch outlet

Open and close the 3.25 inch outlet near the bottom again and again. Each portion swells into a foam log 20 inches across and about 20 feet long, with fine, even, closed cells, weighing 0.8 lb per cubic foot.

Zana zinazohitajika:

Riakta ya shinikizoRiakta ya shinikizo
Miwani ya kinga dhidi ya kemikaliMiwani ya kinga dhidi ya kemikali
Glavu za mpiraGlavu za mpira
5

Saw into boards

When the foam has set, saw it lengthwise into slabs (ours: a woodworking saw).

Zana zinazohitajika:

Msumeno wa useremalaMsumeno wa useremala
Glavu za mpiraGlavu za mpira

Vifaa

2

Zana Zinazohitajika

7

Mchoro huu unatengeneza

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Extruded Polystyrene Foam Board: Polystyrene Swollen with Methyl Chloride and Let Out below 130 °C
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Extruded Polystyrene Foam Board: Polystyrene Swollen with Methyl Chloride and Let Out below 130 °C

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