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Properties of TERATHANE®

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.
Physical Properties
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.
Stability
TERATHANE® polyether glycols contain an oxidation inhibitor. An approximate shelf-life of TERATHANE® polyether glycols is two years, if the product is stored in the original container, at ambient temperature, under a dry nitrogen blanket, and tightly closed. Because storage and local ambient conditions vary and INVISTA has no control over the practices, procedures and conditions at a customer’s facility, the shelf-life estimate provided should be used as guidance only. It is not provided as a guarantee of any shelf life.
Stabilizer BHT:
Terathane® 250, 650, 1000, 1400, 2000: 200 - 350 ppm
Terathane® 1800: 150 - 350 ppm
Terathane® 2900: 300 - 500 ppm
Specifications - INVISTA TERATHANE® Polyether Glycols
  250 650 1000 1400 1800 2000 2900
Molecular weight 230-270 625-675 950-1050 1350-1450 1700-1900 1900-2100 2825-2976
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 <40 <40 <40 <40 <40 <40


Other Properties - INVISTA TERATHANE® Polyether Glycols
  250 650 1000 1400 1800 2000 2900
Viscosity 40°C cP (mPa • s) 40-80 100-200 260-320 480-700 850-1050 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 max.10
For more details see the technical PUSH bulletin
"Properties, Uses, Storage and Handling of INVISTA Glycols".
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