반응 #491488

반응 방정식

2-Ethyl hexyl glycidyl ether

nitrogen in

KOH

→

polymer

2-Ethyl Hexyl-Glycidyl Ether

용매

toluene

toluene

반응 조건

후처리

1. 1
   기타In a 250 mL, round bottom 3-neck flask equipped with a condenser
2. 2
   workup.WAITthe reaction temperature was kept at 110° C. for 5 hours
3. 3
   온도After the reaction mass was cooled to 60° C.
4. 4
   기타The solution was precipitated into 300 mL of hexane
5. 5
   여과After filtration
6. 6
   세척washing with ethyl acetate (100 mL×3×)
7. 7
   기타drying in vacuum

실험 절차

In a 250 mL, round bottom 3-neck flask equipped with a condenser, a nitrogen in/out let, a mechanical stirrer, a thermo-watch, and a heating mantle, a mixture of 30 g of 35,000 Mw PEG and toluene (80 mL) was heated to 60° C. At this temperature, KOH (0.77 g, 0.02 mol, in 1 g of water) was added and the reaction mixture was stirred for 1 hour. 2-Ethyl hexyl glycidyl ether (1.91 g, 0.02 mole) was added and the reaction temperature was kept at 110° C. for 5 hours. After the reaction mass was cooled to 60° C., toluene (80 mL) was further added. The solution was precipitated into 300 mL of hexane. After filtration and washing with ethyl acetate (100 mL×3×) and drying in vacuum, a white polymer (31 g) was obtained. 1H NMR showed 5.2% hydrophobe incorporation. The Brookfield viscosity of a 5% aqueous solution of this oligomer was >200,000 cps (BF LV, S-63, 0.3 rpm at 25° C.). Paint performance: SG10 M (standard formulation). TE %=0.11, Viscosity Loss upon Tinting (VLT)=−24 KU. For UCAR 379 G, TE %=0.28, VLT=−30 KU.

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