GR23586B - METHOD FOR THE PREPARATION OF A STABLE SOLUTION OF A HARDENED CONCENTRATION PRODUCT FROM MELAMINE, THIURIA AND FORMALDEUDE. - Google Patents
METHOD FOR THE PREPARATION OF A STABLE SOLUTION OF A HARDENED CONCENTRATION PRODUCT FROM MELAMINE, THIURIA AND FORMALDEUDE.Info
- Publication number
- GR23586B GR23586B GR560123586A GR560123586A GR23586B GR 23586 B GR23586 B GR 23586B GR 560123586 A GR560123586 A GR 560123586A GR 560123586 A GR560123586 A GR 560123586A GR 23586 B GR23586 B GR 23586B
- Authority
- GR
- Greece
- Prior art keywords
- melamine
- preparation
- thiuria
- formaldeude
- hardened
- Prior art date
Links
Landscapes
- Phenolic Resins Or Amino Resins (AREA)
Abstract
έθοδος παρασκευής σταθερού διαλύματος ενός δυναμένου να σκληρύνηται προϊόντος συμπυκνώσεως εκ μελαμίνης, θειουρίας και φορμαλδεϋδης δια θερμάνσεως των συστατικών εντός υδατικοαλκαλικού μέσου, χαρακτηριζομένη εκ του ότι, εν διάλυμα ληφθέν δια θερμάνσεως μελαμίνης και θειουρίας εν μοριακή σχέσει μεταξύ .......... και 1:0.5, εις τιμήν ρΗ μεταξύ 7.0 και 10.0 μετά φορμαλδεϋδης και έχον περιεκτικότητα εις στερεάν ουσίαν μεταξύ 40-65%, θερμαίνεται εις θερμοκρασίας μη υπερβαινούσας ουσιωδώς τους 100ο Κ, μέχρις ότου δείγμα του διαλύματος της ρητίνης, αραιούμενον μεθ' ύδατος εις τους 20ο Κ. προς μίαν περιεκτικότητα εις στερεάν ουσίαν 30, 40%, αποδώση ελαφράν θόλωσιν, μεθ' ο το διάλυμα της ρητίνης ψύχεται εις την θερμοκρασίαν του περιβάλλοντος, η δετιμή ρΗ τούτου ρυθμίζεται μεταξύ 8.5 και 10.0. Method for the preparation of a stable solution of a curable concentrate of melamine, thiourea and formaldehyde by heating the components in an aqueous-alkaline medium, characterized in that, in a solution obtained by heating melamine and thiourea in ... and 1: 0.5, at a pH between 7.0 and 10.0 after formaldehyde and having a solids content of between 40-65%, is heated to a temperature not exceeding substantially 100 ° K, until a sample of the resin solution is diluted with water at at 20 ° C to a solids content of 30, 40%, yield a slight turbidity, as the resin solution is cooled to ambient temperature, the pH of which is adjusted between 8.5 and 10.0.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GR560123586A GR23586B (en) | 1956-09-05 | 1956-09-05 | METHOD FOR THE PREPARATION OF A STABLE SOLUTION OF A HARDENED CONCENTRATION PRODUCT FROM MELAMINE, THIURIA AND FORMALDEUDE. |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GR560123586A GR23586B (en) | 1956-09-05 | 1956-09-05 | METHOD FOR THE PREPARATION OF A STABLE SOLUTION OF A HARDENED CONCENTRATION PRODUCT FROM MELAMINE, THIURIA AND FORMALDEUDE. |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GR23586B true GR23586B (en) | 1962-09-05 |
Family
ID=36864756
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GR560123586A GR23586B (en) | 1956-09-05 | 1956-09-05 | METHOD FOR THE PREPARATION OF A STABLE SOLUTION OF A HARDENED CONCENTRATION PRODUCT FROM MELAMINE, THIURIA AND FORMALDEUDE. |
Country Status (1)
| Country | Link |
|---|---|
| GR (1) | GR23586B (en) |
-
1956
- 1956-09-05 GR GR560123586A patent/GR23586B/en unknown
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