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Properties of TERATHANE® |
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TERATHANE® polyether glycol is a polytetramethylene ether glycol (PTMEG). It is a waxy, white solid that melts to a clear, colourless liquid over a wide temperature range near room temperature.
INVISTA manufactures PTMEG in 7 molecular weight grades: TERATHANE® 250, 650, 1000, 1400, 1800, 2000 and 2900 (see table 1 as follows).
TERATHANE® is a blend of linear diols in which the hydroxyl groups are separated by repeating tetramethylene ether groups:
HO(CH2CH2CH2CH2-O-)nH
For example, in TERATHANE® 1000 n averages 14. For TERATHANE ® 2000, n averages about 27.
The Chemical Abstracts Service covers TERATHANE® under two names: furan, tetrahydro, polymer (CAS Reg. No. 24979-97-3 ) and poly(oxy-1,4-butanediyl)-a-hydro-w-hydroxyl (CAS Reg. No. 25190-06-1.
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| Physical Properties |
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In Table 1 are listed the Specifications and Other Properties for all available TERATHANE® grades. For special features on the lowest mol.weight 250 see the page TERATHANE® 250
TERATHANE ®polyether glycols are readily soluble in alcohols, esters and ketones but they are insoluble in aliphatic hydrocarbons. TERATHANE® polyether glycols will also dissolve in aromatic and chlorinated hydrocarbons but are insoluble in water.
These glycols are all hygroscopic. At room temperature TERATHANE® can absorb up to 2% water, depending on the molecular weight.
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| Stability |
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TERATHANE® polyether glycols contain an oxidation inhibitor. After storage under nitrogen for one year at 70°C TERATHANE® polyether glycols still meet production specifications.
Stabilizer BHT:
Terathane® 250, 650, 1000, 1400, 2000, 2900: 300 - 500 ppm
Terathane® 1800: 150 – 350 ppm |
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| TABLE 1 Specifications and Additional Properties - INVISTA TERATHANE® Polyether Glycols |
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| Specifications |
250 |
650 |
1000 |
1400 |
1800 |
2000 |
2900 |
| Molecular weight |
230-270 |
625-675 |
950-1050 |
1350-1450 |
1700-1900 |
1900-2100 |
2825-2975 |
| Hydroxyl number |
488-416 |
180-166 |
118-107 |
83-77 |
66-59 |
59-53 |
40-38 |
Alkalinity number
(meq.KOH/kg x 30) |
-2 to +1 |
-2 to+1 |
-2 to +1 |
-2 to +1 |
-2 to +1 |
-2 to +1 |
-2 to +1 |
| Water, ppm |
<150 |
<150 |
<150 |
<150 |
<150 |
<150 |
<150 |
| Color, APHA |
<40 |
<50 |
<40 |
<40 |
<40 |
<40 |
<40 |
| Other Properties |
250 |
650 |
1000 |
1400 |
1800 |
2000 |
2900 |
| Viscosity 40°C cP (mPa • s) |
40-70 |
100-200 |
260-320 |
480-700 |
850-1050 |
950-1450 |
3200-4200 |
| Density, 40°C g/ml |
0.978 |
0.978 |
0.974 |
0.973 |
0.972 |
0.972 |
0.97 |
| Melting point, °C |
-5 - 0 |
11-19 |
25-33 |
27-35 |
27-38 |
28-40 |
30-43 |
| Rfrctv.Index, nD25 |
1.464 |
1.464 |
1.464 |
1.464 |
1.464 |
1.464 |
1.464 |
| Heat of fusion, kJ/kg |
- |
- |
90 |
- |
- |
109 |
- |
| Ash, wt. % |
<0.001 |
<0.001 |
<0.001 |
<0.001 |
<0.001 |
<0.001 |
<0.001 |
| Iron, ppm |
<1 |
<1 |
<1 |
<1 |
<1 |
<1 |
<1 |
| Flash pt .Tag O.C.,°C |
>163 |
>163 |
>163 |
>163 |
>163 |
>163 |
>163 |
| Peroxide content, ppm as H2O2 |
<5 |
<5 |
<5 |
<5 |
<5 |
<5 |
<5 |
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For more details see the technical PUSH bulletin
"Properties, Uses, Storage and Handling of INVISTA Glycols". |
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