Nanjing Chemical Material Corp.
Service
Products

Main Characteristics of Polyether Polyol Main Characteristics of Polyether Polyol

Polyether polyol is an oligomer whose main chain contains ether bond (-R-O-R-) and whose end or pendant group contains more than two hydroxyl groups (-OH). It is prepared by the ring-opening polymerization with oxidized olefin under the action of catalyst using low molecular weight polyhydric alcohols, polyamines or compounds containing reactive hydrogen as initiators. Polyol initiators include dihydric alcohols such as propylene glycol and ethylene glycol, trihydric alcohols such as glycerinum and trimethylolpropane, and polyhydric alcohols such as pentaerythritol, tetraol, xylitol, sorbitol and cane sugar; amine initiators include diethylamine, diethylenetriamine.

 

The common polyether polyol is propylene glycol polyether with molecular weight of 800-2000, trimethylolpropane polyether with molecular weight of 400-4000 and hydroxyl-terminated polytetrahydrofuran.

 

The residual alkaline catalysts should be removed when polyether resin is used as the adhesive, because they can catalyze the dimerization of isocyanate and affect the quality of adhesives. The polyether is usually neutralized with acid to make the polyether slightly acidic (It does not affect the reaction of polyurethane). The polyether used for preparing polyurethane adhesives is more stringent. Besides hydroxyl value and acid value, potassium and sodium ions should be less than 10 and water content is less than 0.05%. Otherwise, gels may be generated. The polyurethane adhesive prepared with polyether resin has good water resistance, impact resistance and low temperature resistance.

 

Polyether polyol with different functionalities can be prepared according to the number of active atoms in the initiator. The most commonly used polyethers in the preparation of polyurethane adhesives are propylene oxide glycol, polyoxypropylene triol as well as polytetrahydrofuran glycol.

Related News
  • Principle of Surface Tension Reduction by Surfactants

    Principle of Surface Tension Reduction by Surfactants

    March 4, 2021In order to reduce the surface tension of water, for example, the surfactant molecules have hydrophilic and lipophilic groups. Due to the repulsion between the lipophilic groups and the water molecule...view
  • “Young Eagles ” Fly Together

    “Young Eagles ” Fly Together

    May 17, 2022This is probably true of our colleges to be wonderful talkers at work,or probably treat lab experiments seriously and rigorously,or to be the "cute and lovely", "gentle and restrained" boys and girls...view
  • Application of Expandable Microspheres

    Application of Expandable Microspheres

    April 29, 2019Expanded microspheres (also known as foamed microspheres) are high molecular polymers.view
  • The Misunderstood "Hero": Bronopol

    The Misunderstood "Hero": Bronopol

    May 17, 2021For a long time, the preservative industry has misunderstood bronopol, thinking that it is a formaldehyde emitter and relies on the release of formaldehyde to achieve a sterilization effect. Due to th...view
  • Market Application Direction of Glycolic Acid

    Market Application Direction of Glycolic Acid

    March 13, 2019As an organic acid, glycolic acid has a good cleaning function for certain metal scales.view
  • Myristoyl Chloride

    Myristoyl Chloride

    October 13, 2021Myristoyl Chloride also known as tetradecanoyl Chloride. It's a colorless liquid.The substance may be harmful to the environment and special attention should be paid to the pollution of water bodies. ...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