Formaldehyde → Melamine formaldehyde
Reaction equation
[C:1]([O-])(=[O:4])C=C.C(N(CC)C1C=CC(C2(C3C4C(=CC=CC=4)N(CC)C=3C)C3C(=CC=CN=3)C(=O)O2)=C(OCC)C=1)C.[OH-].[Na+].[N:44]1[C:51]([NH2:52])=[N:50][C:48]([NH2:49])=[N:47][C:45]=1[NH2:46].C=O>O>[N:44]1[C:51]([NH2:52])=[N:50][C:48]([NH2:49])=[N:47][C:45]=1[NH2:46].[CH2:1]=[O:4]Participants
Conditions
- Temperature
- 60 °C
Procedure
80 parts of an oligoester acrylate type photosetting resin (trade name "Aronix" available from Toagosei Checmical Industries Co., Ltd.) in which 2.4 parts of 3-(4-diethylamino-2-ethoxyphenyl)-3-(1-ethyl-2-methylindole-3-yl)-4-azaphthalide, used as electron donative compound serving as reactant, and 0.2 part of benzoinethyl ether were dissolved was emulsified in 100 parts of a 5% aqueous solution (pH 4.0) of a styrene-maleic anhydride copolymer and a minority of sodium hydroxide. On the other hand, 10 parts of melamine, 25 parts of a 37% formaldehyde solution and 65 parts of water were mixed and this mixture was adjusted to pH 9 with sodium hydroxide and heated to 60° C., whereupon the mixed solution became transparent in 15 minutes to form a melamine-formalin precondensate. This precondensate was added to the above-said emulsion, stirred for 4 hours at a liquid temperature of 60° C. and then cooled to room temperature. The resultantly obtained microcapsule dispersion had a solid content of approximately 45%.
Sources & evidence
- ORD record
- ord-04e6472979014fe196279846db4e2521
- Source dataset
- uspto-grants-1985_02
- Patent number
- US04501809
Reaction notes
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