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Method of preparing polyalkylene oxide carboxylic acids

  • US 5,605,976 A
  • Filed: 05/15/1995
  • Issued: 02/25/1997
  • Est. Priority Date: 05/15/1995
  • Status: Expired due to Term
First Claim
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1. A method of preparing a polyalkylene oxide containing a terminal carboxylic acid, comprising:

  • i) reacting a polyalkylene oxide with a tertiary alkyl haloacetate in the presence of a base to form a tertiary alkyl ester of polyalkylene oxide carboxylic acid; and

    ii) reacting said tertiary alkyl ester with an acid to form said polyalkylene oxide carboxylic acid.

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