Water → Diethylene Glycol Monobutyl Ether

HRID 1741213Notes

Reaction equation

HRID 1741213 reaction equation
[CH2:1]([OH:13])[CH2:2]CCCCCCCCCC.[CH2:14]([OH:30])[CH2:15]CCCCCCCCCCCCCC.[CH2:31]([CH2:38][CH2:39]N=C=O)[CH2:32]CCN=C=O.[OH2:43]>[Sn]>[CH3:39][CH2:38][CH2:31][CH2:32][O:43][CH2:15][CH2:14][O:30][CH2:2][CH2:1][OH:13]

Participants

6

Reactant 4

HCID 962WaterHCID 2682Cetyl AlcoholHCID 81931-DodecanolHCID 13192Hexamethylene diisocyanate

Product 1

HCID 8177Diethylene Glycol Monobutyl Ether

Reagents, catalysts & solvents 1

HCID 5352426Tin atomCatalyst

Procedure

A blend of 3350 and 8000 molecular weight poly(ethylene glycol) was made up to give an average molecular weight of approximately 3400 g/mole. While mixing, the poly(ethylene glycol) was dewatered under vaccum for 3 hrs.; the temperature was then stabilized at 75° C. and the reactor contents placed under a nitrogen blanket. A mixture of dodecanol and hexadecanol was added to serve as the linear cap; 1,6-hexamethylene diisocyanate was also added to the reactor and mixed for two minutes. A tin catalyst was then added and the reaction allowed to continue for 30 minutes. A diamine modifier, Kemamine D-970 (Witco Corp.), was added and allowed to react for 20 minutes. The molten polymer was then discharged to water/cosolvent solution to give a final product of 25% polymer/15% butyl Carbitol/60% water. This polymer was designated Comparative A.

Workup

  1. customto give an average molecular weight of approximately 3400 g/mole
  2. additionWhile mixing
  3. customwas then stabilized at 75° C.
  4. additionwas added
  5. customcap
  6. additionmixed for two minutes
  7. customto react for 20 minutes

Sources & evidence

ORD record
ord-991a8afbd6774f63b289551ef8709b9b
Source dataset
uspto-grants-1999_10
Patent number
US05973063

Reaction notes

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