Method of preparing N-(2-aminoalkyl)-2-aminoethoxylate ethane sulfonate

{
  "publication_number": "US6124496A",
  "country": "US",
  "kind": "A",
  "title": "Method of preparing N-(2-aminoalkyl)-2-aminoethoxylate ethane sulfonate",
  "abstract": "The present invention relates to a synthesis method of thionate diamine by the reaction of alkali metal isethionate with diols to form alkali metal isethionate ethoxylate having the following structural formula: HO(CH.sub.2 CH.sub.2 O).sub.n CH.sub.2 CH.sub.2 SO.sub.3 A The above isethionate ethoxylate is then reacted with aliphatic diamine having a Carbon number of 2 to 6 to form a series of N-(2-aminoalkyl)-2-aminoethyoxylate ethane sulfonate having the following structure formula: H.sub.2 N--(CH.sub.2).sub.m --NH--(CH.sub.2 CH.sub.2 O).sub.n CH.sub.2 CH 2 SO 3 A wherein m=2-12 n=1-3 A=K or Na",
  "claims": [
    "1. A method of preparing N-(2-aminoalkyl)-2 aminoethoxylate ethane sulfonate comprising the step of reacting an alkali metal isethionate ethoxylate with an aliphatic diamine at a temperature within a range of 100 to 300 degrees C. to form a product having the following structural formula: H.sub.2 N--(CH.sub.2).sub.m --NH--(CH.sub.2 CH.sub.2 O).sub.N CH.sub.2 CH.sub.2 SO.sub.3 A wherein m=2-12, n=1-3 and A=K or Na.",
    "2. The method as set forth in claim 1, wherein the step of reacting includes the step of adding an organic polar solvent.",
    "3. A method of preparing an aqueous polyurethane dispersion, comprising the steps of: (a) reacting an alkali metal isethionate ethoxylate with an aliphatic diamine at a temperature within a range of 100 to 300 degrees C. to form a product having the following structural formula: H.sub.2 N--(CH.sub.2).sub.m --NH--(CH.sub.2 CH.sub.2 O).sub.N CH.sub.2 CH.sub.2 SO.sub.3 A wherein m=2-12, n=1-3 and A=K or Na; (b) reacting a polymer selected from the group consisting of polyester and polyether polyol with a diisocyanate to form a prepolymer; (c) adding a low boiling point organic solvent to the prepolymer of step (b); (d) forming an aqueous solution of the product of step (a); (e) adding the aqueous solution of step (d) to the organic solvent and prepolymer of step (c); and, (f) removing the organic solvent."
  ],
  "cpc": [
    "C07C 303/22",
    "C07C 303/32",
    "C08G 18/0828",
    "C08G 18/3872"
  ],
  "assignees": [
    "CHINA TEXTILE INST"
  ],
  "filing_date": "1998-10-16",
  "publication_date": "2000-09-26",
  "grant_date": "2000-09-26",
  "priority_date": "1998-10-16",
  "application_number": "US-17344798-A",
  "family_id": "22632078",
  "citations": [
    "JPS549225A"
  ]
}