Formaldehyde → Melamine formaldehyde

HRID 615897Notes

Reaction equation

HRID 615897 reaction equation
C(C1=C[C:11](OC1=O)=[O:12])=CC1C=CC=CC=1.[OH-].[Na+].[N:18]1[C:25]([NH2:26])=[N:24][C:22]([NH2:23])=[N:21][C:19]=1[NH2:20].C=O>O>[CH2:11]=[O:12].[N:18]1[C:25]([NH2:26])=[N:24][C:22]([NH2:23])=[N:21][C:19]=1[NH2:20]

Participants

6

Reactant 4

HCID 712FormaldehydeHCID 7955MelamineHCID 14798Sodium Hydroxide2×HCID 54215275Styrenemaleic anhydride

Product 1

HCID 93374Melamine formaldehyde

Reagents, catalysts & solvents 1

HCID 962WaterSolvent

Conditions

Temperature
60 °C

Procedure

A photosetting microcapsule dispersion was prepared in the following way. A mixture consisting of 80 parts of an epoxy acrylate photosetting resin (trade name "Ripoxy" available from Showa Kobunshi Co., Ltd.) and 0.2 part of benzoinethyl ether was emulsified in 100 parts of a 5% aqueous solution (pH 4.0) of a styrenemaleic anhydride copolymer and a small quantity of sodium hydroxide. On the other hand, a mixture composed of 10 parts of melamine, 25 parts of a 37% formaldehyde solution and 65 parts of water was adjusted to pH 9 with sodium hydroxide and heated to 60° C., whereby the mixture became transparent in 15 minutes to obtain a melamine-formaldehyde precondensate. This precondensate was added to the previously prepared emulsion and the mixture was stirred at 60° C. for 4 hours and then cooled to room temperature.

Workup

  1. customA photosetting microcapsule dispersion was prepared in the following way

Sources & evidence

ORD record
ord-c8d8deb7e5f04e71ae639029405a090b
Source dataset
uspto-grants-1985_02
Patent number
US04501809

Reaction notes

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