Method for producing polyester polyols having low volume of dioxane waste

Method for producing polyester polyols having low volume of dioxane waste

  • CN 102,203,155 A
  • Filed: 10/24/2009
  • Published: 09/28/2011
  • Est. Priority Date: 11/06/2008
  • Status: Active Application
First Claim
Patent Images

1. be used to prepare the method for polyester polyol, wherein willAt least a carboxylic acid anhydride (A), glycol ether (B) withAt least a C 2-C 4Glycol (C) and at least a aliphatic C 5-C 12Dicarboxylic acid (D), Perhaps at least a C 5-C 10Glycol (E) and at least a C 4Dicarboxylic acid (F) mixes, Be characterised in that component (B) and (A) mol ratio are 1.5:

  • 1 –

    1.1;

    1, and based on the weight of all components of mixture, component (A) and weight quota (B) are 66 –

    , 95 weight %.

View all claims
    ×
    ×

    Thank you for your feedback

    ×
    ×