Reacción #1475676

ord-5b12022443cf45c99f01c22b5bb86f93

Ecuación de reacción

O
water
ClCCl
methylene chloride
CC(C)(c1ccc(O)cc1)c1ccc(O)cc1
bisphenol-A
O=C([O-])[C@H](O)[C@@H](O)[C@H](O)[C@H](O)CO.[Na+]
sodium gluconate
→
CC(C)(c1ccc(O)cc1)c1ccc(O)cc1.O=C(O)O
Bisphenol-A Polycarbonate

Reactantes

O
water
ClCCl
methylene chloride
CC(C)(c1ccc(O)cc1)c1ccc(O)cc1
bisphenol-A
O=C([O-])[C@H](O)[C@@H](O)[C@H](O)[C@H](O)CO.[Na+]
sodium gluconate

Reactivos

Ninguno

Disolventes

CCN(CC)CC
triethylamine

Condiciones de reacción

Condiciones detalladas
See reaction.notes.procedure_details.

Tratamiento posterior

  1. 1
    OtroTo a reactor fitted with a mechanical agitator
  2. 2
    Otroterminating agent
  3. 3
    workup.ADDITIONPhosgene was introduced at the rate of 18 grams/minute and phosgenation
  4. 4
    TemperaturaThe pH was maintained at between 8.0 and 10.0 by the addition of 25% aqueous sodium hydroxide
  5. 5
    workup.ADDITIONwere added
  6. 6
    Otrothe brine layer separated by centrifuge
  7. 7
    Lavadothe resin solution washed with aqueous acid water
  8. 8
    Otroprecipitated
  9. 9
    Otrodried
  10. 10
    workup.ADDITIONTo this resin product were added minor amounts (about 0.03 parts by weight per hundred parts by weight of resin) of a phosphite
  11. 11
    Otrowas then fed to an extruder operating at a temperature of about 500° F.
  12. 12
    Otromolded at about 570° F. into test samples

Procedimiento

To a reactor fitted with a mechanical agitator were charged 5.5 liters of deionized water, 10 liters of methylene chloride, 2280 grams (10 moles) of bisphenol-A, 28 milliliters of triethylamine, 3.4 grams of sodium gluconate, and 0.40 mole of chain terminating agent. Phosgene was introduced at the rate of 18 grams/minute and phosgenation is continued for 60 minutes. The pH was maintained at between 8.0 and 10.0 by the addition of 25% aqueous sodium hydroxide. After phosgenation has ceased 4 liters of methylene chloride were added, the brine layer separated by centrifuge and the resin solution washed with aqueous acid water. The resin was steam precipitated and dried. To this resin product were added minor amounts (about 0.03 parts by weight per hundred parts by weight of resin) of a phosphite and of an epoxy stabilizer. This resin product was then fed to an extruder operating at a temperature of about 500° F. to extrude the resin into strands and the extruded strands chopped into pellets. The pellets were then injection molded at about 570° F. into test samples measuring about 21/2"×1/2"×1/8".

Fuente

DOI: 10.6084/m9.figshare.5104873.v1Patente: US04431793uspto-grants-1984_02