Formaldehyde → Melamine formaldehyde
Reaction equation
CCN(C1C=CC2C3(C4C=C(Cl)C=CC=4OC=2C=1)O[C:19](=[O:20])C1C3=CC=CC=1)CC.[OH-].[Na+].[N:32]1[C:39]([NH2:40])=[N:38][C:36]([NH2:37])=[N:35][C:33]=1[NH2:34].C=O>O>[CH2:19]=[O:20].[N:32]1[C:39]([NH2:40])=[N:38][C:36]([NH2:37])=[N:35][C:33]=1[NH2:34]Participants
Reactant 4
Product 1
Reagents, catalysts & solvents 1
Conditions
- Temperature
- 60 °C
Procedure
A solution prepared by dissolving 2.5 parts by weight of 3-diethylamino-7-chlorofluoran in 80 parts by weight of NISSEKI HISOL N-296 (an oil, a trade name, mfd. by Nippon Sekiyu Kagaku K.K.) was emulsified in 100 parts by weight of a 5% aqueous solution of pH 4.0 prepared by dissolving a styrene-maleic anhydride copolymer together with a small amount of sodium hydroxide. On the other hand, when a mixture of 10 parts by weight of melamine, 25 parts by weight of a 37% aqueous formaldehyde solution and 65 parts by weight of water was adjusted to pH 9.0 with sodium hydroxide and heated at 60° C., the mixture became transparent after 15 minutes and a melamine-formaldehyde precondensate was obtained. The precondensate was added to the emulsion obtained above, and the resulting mixture was continuously stirred for 4 hours while maintaining the mixture at 60° C., and then was cooled to room temperature. The solid content of the resulting microcapsule dispersion was 45%.
Workup
- customA solution prepared
- customprepared
Sources & evidence
- ORD record
- ord-9db1cb330c504d2d82f8b53c90754b23
- Source dataset
- uspto-grants-2009_12
- Patent number
- US07635662B2
Reaction notes
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