1-Butanol → Glycol monoethyl ether acetate
Reaction equation
C1C(CC2C=CC(N=C=O)=CC=2)=CC=C(N=C=O)C=1.[CH2:20]([OH:24])[CH2:21]CC.CCCC[CH:29]([C:32]([O-:34])=O)CC.CCCC[CH:39]([C:42]([O-])=[O:43])CC.[Sn+2]>>[CH3:39][CH2:42][O:43][CH2:29][CH2:32][O:34][C:20]([CH3:21])=[O:24]Participants
Conditions
- Temperature
- 70 °C
Procedure
A mixture of 495.7 g. (3.95 equivalents) of 4,4'-methylenebis(phenyl isocyanate) and 2.81 g. (0.038 equivalents) of 1-butanol was heated at 50° C for 3 hours. A portion (131.2 g.) of the resulting mixture was then added, with vigorous agitation, to a portion (306.8 g.) of the above polyol blend to which had been added 0.09 g. of stannous octoate. The resulting mixture was poured into a tray and cured by heating at 70° C for 20 hours. The resulting elastomer, which had a hardness of 45 Shore D, was chopped into granules and heated with 657 g. of Cellosolve acetate at 155° C until a clear solution was obtained (about 1 hour heating). The resulting coating composition, containing 40% w/w of elastomer, had a viscosity of 14,900 cps. at 25° C. A film was cast from this solution and found to have a tensile strength of 2100 psi and an elongation at break of 820%.
Workup
- additionA mixture of 495.7 g
- additionhad been added 0.09 g
- additionThe resulting mixture was poured into a tray
- temperatureheated with 657 g
Sources & evidence
- ORD record
- ord-38a6e0ce89e542978c3145f6c673411e
- Source dataset
- uspto-grants-1978_04
- Patent number
- US04083815
Reaction notes
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