Styrene → Styrene
Reaction equation
CC1C(N=C=O)=CC([N:8]=C=O)=CC=1.[C:14]([O:18][CH2:19][CH2:20]O)(=[O:17])C=C.[CH2:22]=[CH:23][C:24]1[CH:29]=[CH:28][CH:27]=[CH:26][CH:25]=1.C([O-])(=O)CCCCCCCCCCC.C([O-])(=O)CCCCCCCCCCC.C([Sn+2]CCCC)CCC>>[CH2:22]=[CH:23][C:24]1[CH:29]=[CH:28][CH:27]=[CH:26][CH:25]=1.[NH2:8][C:14]([O:18][CH2:19][CH3:20])=[O:17]Participants
Procedure
A hydroxyl polyester having an acid number of 0.3 and a hydroxy number of 48.1 was prepared from 714 g (11.5 moles) of ethylene glycol and 1460 g (10 moles) of adipic acid in the conventional manner. 400 ppm of hydroquinone were added to this polyester to obtain a 50% styrene solution of the polyester. 4676 g (2 equivalents) of this solution were allowed to react with 248 g (2.85 equivalents) of tolylene diisocyanate and 116 g (1 mole) of hydroxylethyl acrylate at 65° C. or less for two hours. To the resulting reaction product were added dropwise over 1.5 hours 364 g of styrene and 2.7 g of dibutyltin dilaurate. The reaction was allowed to continue at 70° C. for further two hours until no NCO remained in the reaction system, thereby to obtain a 50% styrene solution of an unsaturated acrylic urethane (hereinafter called Acrylic Urethane I). The urethane was found to have a weight-average extension of molecular chain of 600 A.
Workup
- customTo the resulting reaction product
Sources & evidence
- ORD record
- ord-388ce604aa904bd5af9696c31d28cf64
- Source dataset
- uspto-grants-1983_06
- Patent number
- US04390662
Reaction notes
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