Ethylene Oxide → Urethane acrylate
Reaction equation
[O:1]=[C:2]=[N:3]C1CC(C)(C)CC(C)(CN=C=O)C1.C1OC1.C1OC1CC.OC1C=CC(C(C2C=[CH:39][C:38]([OH:41])=CC=2)(C)C)=CC=1.C(C1C=C(C)C=C(C(C)(C)C)C=1O)(C)(C)C.[C:58]([O:62]CCO)(=[O:61])[CH:59]=[CH2:60]>>[C:58]([OH:62])(=[O:61])[CH:59]=[CH2:60].[NH2:3][C:2]([O:41][CH2:38][CH3:39])=[O:1]Participants
7
Procedure
Into a reaction vessel equipped with a stirrer, 168.2 gm of isophorone diisocyanate, 1,044.6 gm of copolymer of ethylene oxide, 1,2-butylene oxide, and bisphenol A (1:7:1 by weight) with a number average molecular weight of 2,052, and 0.3 gm of 2,6-di-tert-butyl-4-methyl phenol, as a polymerization inhibitor, were charged. After cooling the mixture to 15° C. in an ice-cooled bath, 1 gm of dibutyltindilaurate was added to initiate the reaction at 30 to 40° C. for 2 hours. After the addition of 47.2 gm of hydroxyethyl acrylate, the mixture was stirred for 5 hours at a temperature of 50° to 60° C. to obtain urethane acrylate [A-2] with a number average molecular weight of 6,140.
Workup
- customInto a reaction vessel equipped with a stirrer
- temperaturecooled bath
- addition1 gm of dibutyltindilaurate was added
- customthe reaction at 30 to 40° C. for 2 hours
Sources & evidence
- ORD record
- ord-7940630da57347e8aa644dabd2029391
- Source dataset
- uspto-grants-1998_01
- Patent number
- US05712035
Reaction notes
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