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
  • Fully Refined Paraffin Wax

    Fully Refined Paraffin Wax

    July 20, 2021Fully Refined Paraffin Wax is a white, cream, yellow or colorless soft solid derivable from petroleum, paraffin wax is a mixture of hydrocarbon molecules containing between twenty and forty carbon ato...view
  • Special High-activity Polyether Polyol

    Special High-activity Polyether Polyol

    June 4, 2021With the expansion of the application field of polyurethane, various requirements have been put forward for the properties of polyether polyol. On the basis of continuous research, many special polye...view
  • Preparation of Ethyl Iodide

    Preparation of Ethyl Iodide

    April 29, 2019Ethyl iodide is usually reacted with ethanol, iodine and red phosphorus, but the reaction is slow, and it needs to be heated in a reflux device for several hours.view
  • Preservative Effect of Cocoamido Propil Betaina

    Preservative Effect of Cocoamido Propil Betaina

    May 17, 2021Cocoamido propil betaina, also known as coconut betaine (abbreviated CAPB), is a coconut oil derivative that is a viscous yellow liquid produced when raw coconut oil is mixed with a naturally derived ...view
  • What is the Glycolic Acid in Skin Care Products

    What is the Glycolic Acid in Skin Care Products

    October 30, 2020Glycolic acid is a water-soluble α-hydroxy acid (AHA) derived from sugarcane. It is one of the most famous and the most extensively used α-hydroxy acids in the skin care industry. Glycolic acid work...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