Carbamic acid, ethyl ester → Phthalic Anhydride

HRID 989415Notes

Reaction equation

HRID 989415 reaction equation
N[C:2]([O:4][CH2:5][CH3:6])=[O:3].[OH-:7].[K+].[CH2:9]1O[CH:10]1[CH3:11].[CH2:13]1O[CH2:14]1>C(O)CO.OCC(CO)O>[C:5]1(=[O:7])[O:4][C:2](=[O:3])[C:11]2=[CH:10][CH:9]=[CH:13][CH:14]=[C:6]12

Participants

7

Reactant 4

HCID 5641Carbamic acid, ethyl esterHCID 6354Ethylene OxideHCID 6378Propylene OxideHCID 14797Potassium Hydroxide2×

Product 1

HCID 6811Phthalic Anhydride

Reagents, catalysts & solvents 2

HCID 174Ethylene GlycolSolventHCID 753GlycerolSolvent

Procedure

100 parts by weight of polymeric MDI (Sumidur 44V20 (NCO%; 31.5) manufactured by Sumitomo Bayer Urethane Co., Ltd.), 8 parts by weight of a polyether polyol with a hydroxy value of 56 mg KOH/g having propylene oxide and ethylene oxide added to glycerin, and 8 parts by weight of a polyester polyol with a hydroxy value of 56 mg KOH/g formed from phthalic anhydride and ethylene glycol were reacted under the condition of 80 deg. C. for 2 hours to prepare a polymeric MDI prepolymer (prepolymer A) having an isocyanate group content of 26% which was used as the isocyanate component.

Sources & evidence

ORD record
ord-a673c8c37b5e49e1a6d5f768d1166cda
Source dataset
uspto-grants-2003_10
Patent number
US06638989B2

Reaction notes

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