Sodium Hydroxide → Divinylbenzene-styrene
Reaction equation
COC(=O)C=C.[CH:7]([C:9]1[CH:14]=[CH:13][CH:12]=[CH:11][C:10]=1[CH:15]=[CH2:16])=[CH2:8].[OH-].[Na+]>O>[CH2:8]=[CH:7][C:9]1[CH:14]=[CH:13][CH:12]=[CH:11][CH:10]=1.[CH:7]([C:9]1[CH:14]=[CH:13][CH:12]=[CH:11][C:10]=1[CH:15]=[CH2:16])=[CH2:8]Participants
Reactant 2
Product 1
Reagents, catalysts & solvents 1
Conditions
- Temperature
- 93 °C
Procedure
This example illustrates the hydrolysis and resuspension of the methylacrylate-divinylbenzene copolymer of Example 7 to produce a weak-acid-functionalized ion exchange resin emulsion. A 200-g sample of the emulsion produced in Example 7 in added to a stirred solution of 57.4 g of 50% aqueous sodium hydroxide solution in 250 ml of water--this represents a 20% excess of base--and the emulsion is observed to coagulate. This mixture is heated to 93° C., held at that temperature for 2 hours, and cooled to room temperature. The coagulum is observed to re-suspend in the sodium hydroxide solution during the stirring and heating period. The emulsion product is diluted to 800-850 ml with water and is passed through a column of Amberlite IR-120 cation exchange resin (trademark of Rohm and Haas Company, Philadelphia, Pennsylvania, for a sulfonic acid functionalized, styrene/divinylbenzene gel cation exchange bead resin) in the H+ form to remove the excess sodium hydroxide and convert the product to the free acid form. The solids content of the resulting emulsion is 4.74%, and the weak acid cation exchange capacity is 9.4 meq/g of dry polymer.
Workup
- customto produce a weak-acid-functionalized ion exchange resin emulsion
- customA 200-g sample of the emulsion produced in Example 7
- temperaturecooled to room temperature
- temperatureheating period
Sources & evidence
- ORD record
- ord-40980c3b94d44cc58f60461d8f80d36a
- Source dataset
- uspto-grants-1981_01
- Patent number
- US04247340
Reaction notes
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