반응 #75469

반응 방정식

maleic acid

acrylic acid

sodium persulfate

sodium hydroxide

→

acrylic acid maleic acid

용매

water

water

water

반응 조건

후처리

1. 1
   기타kept at 95 to 98° C. in nitrogen
2. 2
   workup.DISSOLUTIONdissolved in 16 g
3. 3
   workup.DISSOLUTIONdissolved in 50 g
4. 4
   workup.ADDITIONwere separately added dropwise
5. 5
   기타over the period of 2 hours
6. 6
   기타was kept at 98° C.
7. 7
   기타retuned to room temperature

실험 절차

11 g maleic acid was dissolved in 200 g deionized water, and this solution was adjusted to pH 3.85 with 48% aqueous sodium hydroxide. The mixture was heated to 95° C. and kept at 95 to 98° C. in nitrogen atmosphere, and 64 g acrylic acid dissolved in 16 g deionized water, and 4.7 g sodium persulfate dissolved in 50 g deionized water, were separately added dropwise thereto over the period of 2 hours. Thereafter, the reaction solution was kept at 98° C., stirred for 6 hours, and retuned to room temperature to give an aqueous solution of poly(acrylic acid/maleic acid). As a result of measurement of the resulting dispersant by GPC, the weight average molecular weight was 87,000 (determined using polyethylene glycol standards). The conditions for GPC measurement were the same as in Synthesis Example 1.

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