Methyl Methacrylate → Buta-1,3-diene;methyl 2-methylprop-2-enoate;styrene

HRID 2109319Notes

Reaction equation

HRID 2109319 reaction equation
[C:1]([O:6][CH3:7])(=[O:5])[C:2]([CH3:4])=[CH2:3].C(OCC)(=O)C=C.[C:15]([O-])(=O)[CH2:16][CH2:17][CH2:18]CCCCCC[CH2:25][CH2:26][CH2:27][CH2:28][CH2:29][CH2:30][CH2:31][CH3:32].[K+].S(OOS([O-])(=O)=O)([O-])(=O)=O.[K+].[K+]>O>[CH2:15]=[CH:16][CH:17]=[CH2:18].[CH3:4][C:2]([C:1]([O:6][CH3:7])=[O:5])=[CH2:3].[CH2:32]=[CH:31][C:30]1[CH:25]=[CH:26][CH:27]=[CH:28][CH:29]=1

Participants

6

Reactant 4

HCID 6658Methyl MethacrylateHCID 8821Ethyl AcrylateHCID 24412Potassium PersulfateHCID 23673840Potassium Stearate

Product 1

HCID 159991Buta-1,3-diene;methyl 2-methylprop-2-enoate;styrene

Reagents, catalysts & solvents 1

HCID 962WaterSolvent

Procedure

This step is to polymerize a shell part around the core part prepared from the third step. Firstly, 197.5 g of ion exchange water, 117.75 g of methyl methacrylate, 9.25 g of ethyl acrylate and 13.8 g of potassium stearate (in 8 wt % solution) were mixed to prepare a pre-emulsion. To the latex prepared from the third step, the pre-emulsion and 69.2 g of potassium persulfate (in 1 wt % solution) were simultaneously and continuously introduced for 1 hour to carry out the reaction of the shell part. While the temperature in the reactor was kept constantly at 70° C., the reaction was aged for 1 hour to complete the polymerization. The final product had a particle size of 190 nm.

Workup

  1. customto polymerize a shell part around the core part
  2. customprepared from the third step
  3. customto prepare a pre-emulsion
  4. customTo the latex prepared from the third step
  5. additioncontinuously introduced for 1 hour
  6. customthe reaction of the shell part
  7. customwas kept constantly at 70° C.
  8. customthe polymerization

Sources & evidence

ORD record
ord-fdd79885498f4cd891823d351304dfdc
Source dataset
uspto-grants-2009_04
Patent number
US07514502B2

Reaction notes

Loading…