Platinum → Platinum divinyltetramethyldisiloxane

HRID 1004726

Reaction equation

HRID 1004726 reaction equation
[H+].[H+].Cl[Pt-2:4](Cl)(Cl)(Cl)(Cl)Cl.[C:10](=O)(O)[O-].[Na+].[CH:15]([Si:17]([CH3:25])([CH3:24])[O:18][Si:19]([CH3:23])([CH3:22])[CH:20]=[CH2:21])=C.[Pt]>C(O)(C)C>[Pt:4].[CH:22]([Si:19]([CH:20]=[CH2:21])([CH3:23])[O:18][Si:17]([CH3:25])([CH3:24])[CH3:15])=[CH2:10]

Participants

6

Reactant 4

HCID 23939PlatinumHCID 61859Chloroplatinic acidHCID 758191,3-Divinyltetramethyldisiloxane2×HCID 516892Sodium Bicarbonate

Product 1

HCID 86614225Platinum divinyltetramethyldisiloxane

Reagents, catalysts & solvents 1

HCID 3776IsopropanolSolvent

Procedure

3.0 kg chloroplatinic acid crystals (40% platinum content) and 15.0 kg isopropanol were placed in a 50-L reactor, and 6.0 kg sodium bicarbonate and 6.0 kg 1,3-divinyltetramethyldisiloxane were then added while stirring. The resulting suspension was heated while stirring. After reacting for 30 minutes at 65 to 75° C., the reaction mass was cooled and the solids were filtered off to give 22.0 kg of an isopropanol solution of platinum-divinyltetramethyldisiloxane complex catalyst. The platinum content was 4.1% as measured by x-ray fluorescence analysis, and the 1,3-divinyltetramethyldisiloxane content as measured by gas chromatography was 9.4%.

Workup

  1. temperatureThe resulting suspension was heated
  2. stirringwhile stirring
  3. temperaturethe reaction mass was cooled
  4. filtrationthe solids were filtered off
  5. customto give 22.0 kg of an isopropanol solution of platinum-divinyltetramethyldisiloxane complex catalyst

Sources & evidence

ORD record
ord-84a50968e75d4a598a449d5a46f18388
Source dataset
uspto-grants-2000_04
Patent number
US06051673

Linked notes

Loading…