RO81594B1 - Process for making a lignin-phenolformaldehyde adhesive for gluing plywood - Google Patents

Process for making a lignin-phenolformaldehyde adhesive for gluing plywood

Info

Publication number
RO81594B1
RO81594B1 RO103099A RO10309981A RO81594B1 RO 81594 B1 RO81594 B1 RO 81594B1 RO 103099 A RO103099 A RO 103099A RO 10309981 A RO10309981 A RO 10309981A RO 81594 B1 RO81594 B1 RO 81594B1
Authority
RO
Romania
Prior art keywords
lignin
adhesive
phenolformaldehyde
making
phenol
Prior art date
Application number
RO103099A
Other languages
Romanian (ro)
Other versions
RO81594A2 (en
Inventor
Florica Nicolau
Petre Iosupescu
Olivia Borsos
Nicolae Iviniciu
Gheorghe Caldarerescu
Original Assignee
Florica Nicolau
Petre Iosupescu
Olivia Borsos
Nicolae Iviniciu
Gheorghe Caldarerescu
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Florica Nicolau, Petre Iosupescu, Olivia Borsos, Nicolae Iviniciu, Gheorghe Caldarerescu filed Critical Florica Nicolau
Priority to RO103099A priority Critical patent/RO81594B1/en
Publication of RO81594A2 publication Critical patent/RO81594A2/en
Publication of RO81594B1 publication Critical patent/RO81594B1/en

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  • Phenolic Resins Or Amino Resins (AREA)
  • Adhesives Or Adhesive Processes (AREA)

Abstract

Inventia se refera la un procedeu de fabricare a unui adeziv ligninfenolformaldehidic pentru încleierea placajului conform caruia se efectueaza în prima faza condensarea lignosulfunatului de sodiu rezultat prin procedeul de fierbere sulfit cu fenol la temperatura de 90 degree C sub agitare timp de 30 min în mediu alcalin la pH=8,5 dupa care produsul rezultat se condenseaza în continuaretot mediul alcalin cu formaldehida la temperatura de 90....92 degree C condensrea continuînd pîna la un raport de miscibilitate rîsina : apa 1: 1,4.The invention relates to a process for manufacturing a lignin-phenol-formaldehyde adhesive for plywood gluing, according to which the condensation of sodium lignosulphonate resulting from the phenol sulphite boiling process at 90 ° C is carried out in the first stage under agitation for 30 minutes in alkaline medium at pH = 8.5 after which the resulting product continuously condenses the alkaline medium with formaldehyde at a temperature of 90 DEG-92 DEG C. The condensation continues to a miscibility ratio of the resin: water 1: 1,4.

RO103099A 1981-01-09 1981-01-09 Process for making a lignin-phenolformaldehyde adhesive for gluing plywood RO81594B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
RO103099A RO81594B1 (en) 1981-01-09 1981-01-09 Process for making a lignin-phenolformaldehyde adhesive for gluing plywood

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
RO103099A RO81594B1 (en) 1981-01-09 1981-01-09 Process for making a lignin-phenolformaldehyde adhesive for gluing plywood

Publications (2)

Publication Number Publication Date
RO81594A2 RO81594A2 (en) 1983-04-29
RO81594B1 true RO81594B1 (en) 1983-04-30

Family

ID=20109409

Family Applications (1)

Application Number Title Priority Date Filing Date
RO103099A RO81594B1 (en) 1981-01-09 1981-01-09 Process for making a lignin-phenolformaldehyde adhesive for gluing plywood

Country Status (1)

Country Link
RO (1) RO81594B1 (en)

Also Published As

Publication number Publication date
RO81594A2 (en) 1983-04-29

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