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
  • 2018 Chemspec Europe

    2018 Chemspec Europe

    January 29, 2019June 20th-21th@ Cologne, GermanyAs one of the largest fine and speciality chemical exhibition in the world, Chemspec 2018 was staged during June 20th-21st 2018 at Cologne, Germany. This year's exhibit...view
  • China Adhesive & TL-EXPO 2018

    China Adhesive & TL-EXPO 2018

    January 29, 20192018 Sept.19th-21st @Shanghai New International Expo CentreThe 21th China International Adhesives and Sealants Exhibition & the 13th China International PSA Tape and Label Expo (CHINA ADHESIVE 201...view
  • Where Can Glycolic Acid Be Used?

    Where Can Glycolic Acid Be Used?

    October 27, 20211. Glycolic acid is used in chemical cleaningGlycolic acid in 70% concentration is mainly used as cleaning agent, the mixture of glycolic acid in 2% concentration and 1% formic acid is a kind of clean...view
  • Go go go!  Spring tea party, here we come!

    Go go go! Spring tea party, here we come!

    May 10, 2022April is the month that could exactly represent spring season with everything fresh and prosperous. Recently NCMC organize a tea party that fulfill our dream of "Poem and the Distance".NCMC is the com...view
  • Application of 3-Methacryloxypropyltrimethoxysilane

    Application of 3-Methacryloxypropyltrimethoxysilane

    September 24, 20203-Methacryloxypropyltrimethoxysilane is a colorless or light-yellow transparent liquid, soluble in acetone and benzene, but insoluble in water. It is stable at the normal temperature and pressure, and...view
  • Main Applications of Bronopol

    Main Applications of Bronopol

    October 30, 2020At ordinary temperature, bronopol is a kind of white to light yellow and yellowish brown crystalline powder. It is odorless, tasteless, soluble in water, ethanol and propylene glycol but difficult 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