L-PTMEG
Introduction
CAS: 24979-97-3
Molecular formula: C4H8O
Molecular weight: 72.1057
Product Properties
PTMEG is a white waxy solid. It turns into the transparent liquid when the temperature is higher than room temperature. It dissolves easily in alcohols, esters, ketones, aromatic hydrocarbons and hydrocarbon chlorides. However, it does not dissolve in water or fatty hydrocarbons. When its molecular weight increases, its solubility drops. At room temperature, PTMEG is a good absorbent of water depending on its molecular weight and maximum up to 2%.
Product Specifications
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Product names
Quality Index
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PTMEG 650
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PTMEG 1000
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PTMEG 1800
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PTMEG 2000
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Molecular Weight(g/mol)
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625-675
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950-1050
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1750-1850
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1950-2050
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Hydroxyl Number (mg Koh/g)
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166.24-179.54
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106.87-118.12
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60.65-64.12
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60.65-64.12
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Water Content (μg/g)
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≤100
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Color (Pt-Co)
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≤30
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Acidity Value (mg/g)
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≤0.05
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Peroxides (wt. μg/g as H2O2)
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≤5
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Stability (wt. μg/g as BHT)
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Consultation between Supply and Requisition Parties
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Product Uses
PTMEG is an important raw material for the production of polyurethane (such as PU fibers, polyurethane elastomer, synthesized leathers, paint additives, adhesives, and sealants), polyesters and polyamides.
Storage and Transportation
PTMEG should be stored in totally closed containers sealed with dry nitrogen. The containers must be fitted with heating equipment outside or inside to keep their internal temperature at about 50℃. Frozen PTMEG can be heated at about 70℃ for 24 hours to melt. PTMEG should not be stored at 90℃ for a long time.
In addition, it should be stored in cool, dry and well-ventilated places, and keep away from fire sources, sparks and naked flames. Due to PTMEG water absorbent and ease of oxidization, it should not be exposed to moisture or air. To avoid static electricity, its containers should be earthen during transportation.
PTMEG becomes highly combustible at high temperature. If the fire is started, one could use spray water, alcohol foam, dry chemicals products or carbon dioxide fire extinguishers to put off the fire. When loading or unloading it, one should wear gloves and safety glasses to prevent contact with the eyes or skin.
