Nanjing Chemical Material Corp.
Service
Products

What is Polyether Polyol What is Polyether Polyol

Polyether polyol is prepared by ring-opening polymerization of epoxide monomers (such as ethylene oxide, propylene oxide and 1,2-epoxybutane) and a compound containing two or more active hydrogen atoms (called an initiator). In the presence of alkali catalyst, active hydrogen compounds initiate ring opening and oxide addition will continue until the required molecular weight is obtained. The number of hydroxyl groups in polyether polyol is determined by the number of unstable hydrogen atoms in the initiator. If the initiator has two active hydrogen, glycol will be formed. The reactivity of polyether polyol to isocyanates depends on the initiator and the type of epoxy monomer that ends the ring-opening polymerization. The primary hydroxyl produced by polyol capped with ethylene oxide is more reactive than the secondary hydroxyl produced by propylene oxide, which is ideal for applications requiring rapid curing time. However, the use of initiator based on ethylene oxide and amine can also make the coating more hydrophilic and damage the barrier performance of the coating (such as waterproof membrane), so a good balance between reactivity and hydrophobicity is necessary.

The VOC limitation faced by epoxy coatings increases the use of epoxidized diols and Polyol (also known as reactive diluents) to reduce the use of solvents in epoxy formulations. However, due to the low reactivity or the epoxy ring near the aliphatic chain, the curing time of epoxy coating containing a large amount of reactive diluents can be greatly prolonged. Moreover, reactive diluents increase the cost of epoxy coating formulation. Therefore, due to their low viscosity and high reactivity, polyether polyol makes polyurethane coatings become the substitute of 100% solid epoxy system used in the application of anticorrosive coatings.
Related News
  • Composite Additive of Trace Elements

    Composite Additive of Trace Elements

    October 13, 2021In composite additive of trace elements, the proportion of trace elements such as copper, zinc, manganese, iron, iodine, selenium and cobalt is reasonable and scientific, and exists in the form of ami...view
  • Lubricant Additive

    Lubricant Additive

    October 13, 2021The concept of a lubricant additive is the addition of one or more compounds to a lubricant in order to give the lubricant some new properties or improve some existing properties of the lubricant. Add...view
  • Cationic Surfactants Commonly Used in Detergents

    Cationic Surfactants Commonly Used in Detergents

    January 15, 2021Cationic surfactants are components with good bactericidal, algaecidal, antifungal, softening, anti-static and conditioning properties. The roles in detergents are: softener, biocide, antistatic, cond...view
  • Benzyl Bromide

    Benzyl Bromide

    October 13, 2021Benzyl bromide, is a benzene ring by bromomethyl bromide substituted aromatic compounds, chemical formula C7H7Br, in the presence of oxidizer it is obtained from toluene and bromine reaction, it is a ...view
  • Propionaldehyde

    Propionaldehyde

    September 23, 20212-Methylbutanoic acid, is a branched-chain alkyl carboxylic acid, it is also known as 2-methylbutyric acid. Itschemical formulaisCH₃CH₂CHCO₂H,which makes ita short-chain fatty acid. Racemic 2-methy...view
  • 2017 Oleon Distributor Meeting

    2017 Oleon Distributor Meeting

    January 31, 2018Date:2017/11/02-11/04Place: Siem Reap, Cambodia Thanks for the invitation from Oleon, this is the third year for NCMC to attend Oleon’s AP& ME distributor meeting. Members from Oleon Belgium base, to...view
  • TEL:+86-25-52337978
  • EMAIL: info@njchm.com
  • ADDRESS:12/F, Block B, Technology and Innovation Building, Nanjing University of Technology, No.5 New Model Road, Nanjing 210009, China