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Product
Polyether Polyols
Segment
Chemicals
Main-Family
Polymers
Sub-Family
Polymer Precursors
Link
http://nguyen.hong.hai.free.fr/EBOOKS/SCIENCE%20AND%20ENGINEERING/MECANIQUE/MATERIAUX/COMPOSITES/Encyclopedia%20of%20Polymer%20Science%20and%20Technology/Vol.04/Polyurethanes.pdf
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#PS354

Description

The Polyether Polyols used in the Manufacture of Polyurethanes are Hydroxy-terminated Macromolecules, with molecular weights ranging from 250 to 8000. The hydroxy functionality can range from 2 to 8. The Alkylene Oxide Polymerization is usually initiated by Alkaline Hydroxides, especially Potassium Hydroxide. In the Base-catalyzed Polymerization of Propylene Oxide (PO), some Rearrangement occurs to give Allyl Alcohol. Further Reaction of Allyl Alcohol with PO produces a Monofunctional Alcohol. Therefore, Polyether Polyols derived from PO are not truly Difunctional. By using Zinc Hexacyano Cobaltate (Double Metal Cyanide) as catalyst, a more Difunctional Polyol is obtained. The backbone of the Polyether Polyols are either PO Homopolymers or Random or Block Copolymers with Ethylene Oxide. Important Characteristics of the Polyol are their Hydroxy Functionality, Hydroxy equivalent weight, and their reactivity and compatibility with the other Components used in the Polyurethane Formulation.

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Status
A
Unit of Measure
Metric Ton
Physical State

Liquid

Building Block / Value Chain Info
Value Chain-I
Propylene
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Transaction Name Date
Modified by UserPic  Kokel, Nicolas 11/21/2022 11:50 AM
Added 4/16/2022 2:21 PM
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