Formaldehyde → Melamine formaldehyde
Reaction equation
[N:1]1[C:8]([NH2:9])=[N:7][C:5]([NH2:6])=[N:4][C:2]=1[NH2:3].[CH2:10]=[O:11]>O>[CH2:10]=[O:11].[N:1]1[C:8]([NH2:9])=[N:7][C:5]([NH2:6])=[N:4][C:2]=1[NH2:3]Participants
4
Reactant 2
Product 1
Reagents, catalysts & solvents 1
Conditions
- Temperature
- 60 °C
Procedure
Independently, to 31.5 g of melamine were added 52.2 g of 37% aqueous solution of formaldehyde and 170.3 g of water, and the resulting mixture was stirred at 60° C. for 30 minutes to obtain a transparent melamine-formaldehyde precondensate. To the above-prepared WOW emulsion at 40° C. was added 25 g of the precondensate. The mixture was stirred at 1,200 r.p.m. using a propeller wing, and was adjusted to pH 5.0 using 2N sulfuric acid. The mixture was then heated to 70° C. for 30 minutes, and stirred for 30 minutes. Further, to the mixture was added 10.3 g of 40% aqueous solution of urea, and the mixture was adjusted to pH 3.5 using 2N sulfuric acid, and then stirred at 70° C. for 40 minutes.
Sources & evidence
- ORD record
- ord-8a4f2f297c9245e4b2719fea6a5c66e3
- Source dataset
- uspto-grants-1993_07
- Patent number
- US05227274
Reaction notes
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