Dimethyl Sulfoxide → 2-Methylprop-2-enoic acid;styrene

Then, into a 500 ml four necked flask, 30.0 g of the above polymer and 50 ml of methanol were added and dissolved, and then 4.2 of potassim hydroxide was added, stirred and dissolved. Then, 16.2 g of benzyl bromide and 100 ml of dimethyl sulfoxide were added thereto, and the mixture was stirred at 80° C. for 2 hours. The reaction solution was dropwise added to a methanol/1.5% hydrochloric acid aqueous solution (volume ratio of 1/1). A white powder was recovered and vacuum-dried to obtain a partial benzyl ester of a styrene/methacrylic acid copolymer (esterification rate: 50% to methacrylic acid, as determined by potentiometric titration). The obtained amount was 32.5 g.

1. dissolutiondissolved
2. dissolutiondissolved
3. stirringthe mixture was stirred at 80° C. for 2 hours
4. customA white powder was recovered
5. customvacuum-dried

ORD record

ord-98921a8237a34620805404cd39247246

Source dataset

uspto-grants-1993_02

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US05183722