1,3-Propanediol → Tetraethoxysilane

HRID 258415

Reaction equation

HRID 258415 reaction equation
C(O)[CH2:2][CH2:3][OH:4].N(CCC[Si:12]([O:19][CH2:20][CH3:21])([O:16][CH2:17][CH3:18])[O:13][CH2:14][CH3:15])=C=O>C([O-])(=O)CCCCCCCCCCC.C([O-])(=O)CCCCCCCCCCC.C([Sn+2]CCCC)CCC>[CH3:15][CH2:14][O:13][Si:12]([O:4][CH2:3][CH3:2])([O:19][CH2:20][CH3:21])[O:16][CH2:17][CH3:18]

Participants

4

Reactant 2

HCID 104421,3-PropanediolHCID 90613Triethoxy(3-isocyanatopropyl)silane

Product 1

HCID 6517Tetraethoxysilane

Reagents, catalysts & solvents 1

HCID 9809426Di-n-butyldilauryltinCatalyst

Procedure

1,3-Propanediol (2.9 g, 38.0 mmol) is reacted with 3-isocyanatopropyltriethoxy silane (16.4 g, 76.0 mmol) and 0.2% dibutyltin dilaurate catalyst. The reaction is conducted under nitrogen at room temperature in a glass vessel with mechanical stirring. An exotherm occurs after 15 minutes and the reaction is complete after 2 hours as evidenced by infrared spectroscopy. The following TEOS macromer is obtained ##STR9## as a low viscosity liquid, MW 508.72, which is stable at room temperature.

Workup

  1. customThe reaction is conducted under nitrogen at room temperature in a glass vessel with mechanical stirring
  2. waitthe reaction is complete after 2 hours

Sources & evidence

ORD record
ord-01a66138fed048baa4ba3103c6c00db5
Source dataset
uspto-grants-1993_11
Patent number
US05266715

Linked notes

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