RO86740B1 - Procedeu pentru obtinerea unor prafuri de presare pentru piese de uz electrotehnic - Google Patents
Procedeu pentru obtinerea unor prafuri de presare pentru piese de uz electrotehnicInfo
- Publication number
- RO86740B1 RO86740B1 RO109788A RO10978883A RO86740B1 RO 86740 B1 RO86740 B1 RO 86740B1 RO 109788 A RO109788 A RO 109788A RO 10978883 A RO10978883 A RO 10978883A RO 86740 B1 RO86740 B1 RO 86740B1
- Authority
- RO
- Romania
- Prior art keywords
- formaldehyde
- parts used
- pressing parts
- mixture
- melamine
- Prior art date
Links
- 238000000034 method Methods 0.000 title abstract 2
- 239000000843 powder Substances 0.000 title abstract 2
- WSFSSNUMVMOOMR-UHFFFAOYSA-N Formaldehyde Chemical compound O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 abstract 6
- 239000000203 mixture Substances 0.000 abstract 3
- 229920000877 Melamine resin Polymers 0.000 abstract 2
- BAVYZALUXZFZLV-UHFFFAOYSA-N Methylamine Chemical compound NC BAVYZALUXZFZLV-UHFFFAOYSA-N 0.000 abstract 2
- 229920000642 polymer Polymers 0.000 abstract 2
- HZAXFHJVJLSVMW-UHFFFAOYSA-N 2-Aminoethan-1-ol Chemical compound NCCO HZAXFHJVJLSVMW-UHFFFAOYSA-N 0.000 abstract 1
- 208000023514 Barrett esophagus Diseases 0.000 abstract 1
- 229920000742 Cotton Polymers 0.000 abstract 1
- 150000001414 amino alcohols Chemical class 0.000 abstract 1
- 239000000945 filler Substances 0.000 abstract 1
- IVJISJACKSSFGE-UHFFFAOYSA-N formaldehyde;1,3,5-triazine-2,4,6-triamine Chemical compound O=C.NC1=NC(N)=NC(N)=N1 IVJISJACKSSFGE-UHFFFAOYSA-N 0.000 abstract 1
- JDSHMPZPIAZGSV-UHFFFAOYSA-N melamine Chemical compound NC1=NC(N)=NC(N)=N1 JDSHMPZPIAZGSV-UHFFFAOYSA-N 0.000 abstract 1
- 229920000728 polyester Polymers 0.000 abstract 1
Landscapes
- Processes Of Treating Macromolecular Substances (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Phenolic Resins Or Amino Resins (AREA)
Abstract
Inventia se refera la un procedeu pentru obtinerea unor prafuri de presare pentru piese de uz electrotehnic, conform caruia, se condenseaza în prima etapa formaldehida cu metilamina la un raport molar formaldehida:melamina de 2,45...2,9:1, în prezenta de aminoalcooli cu greutate moleculara mica alesi dintre monoetanolamina si monopropanolamina, dupa care polimerul melaminoformaldehidic rezultat se amesteca cu umplutura aleasa dintre bumbac, celofibra, poliesteri, în raport în greutate polimer: umplutura de 1,5...1,75:1, se malaxeaza amestecul timp de 1...2h, pasta omogena rezultata fiind uscata initial cu aer cald, la 80...90 degree C si în vid de 100...2000 mm Hg apoi la temperatura de 55...65 degree C pîna la un continut de volatile de maximum 2,5, înfinal amestecul fiind presat la temperatura de 100...110 degree C, presiunea specifica de 300...500 kgf/cm2, timp de presare de 15...80 s/mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| RO109788A RO86740B1 (ro) | 1983-01-20 | 1983-01-20 | Procedeu pentru obtinerea unor prafuri de presare pentru piese de uz electrotehnic |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| RO109788A RO86740B1 (ro) | 1983-01-20 | 1983-01-20 | Procedeu pentru obtinerea unor prafuri de presare pentru piese de uz electrotehnic |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| RO86740B1 true RO86740B1 (ro) | 1985-05-01 |
Family
ID=40903749
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| RO109788A RO86740B1 (ro) | 1983-01-20 | 1983-01-20 | Procedeu pentru obtinerea unor prafuri de presare pentru piese de uz electrotehnic |
Country Status (1)
| Country | Link |
|---|---|
| RO (1) | RO86740B1 (ro) |
-
1983
- 1983-01-20 RO RO109788A patent/RO86740B1/ro unknown
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