RO97848B1 - Process for preparing lignoformaldehyde resin useful as moulding sand binder - Google Patents

Process for preparing lignoformaldehyde resin useful as moulding sand binder

Info

Publication number
RO97848B1
RO97848B1 RO127470A RO12747087A RO97848B1 RO 97848 B1 RO97848 B1 RO 97848B1 RO 127470 A RO127470 A RO 127470A RO 12747087 A RO12747087 A RO 12747087A RO 97848 B1 RO97848 B1 RO 97848B1
Authority
RO
Romania
Prior art keywords
lignoformaldehyde
preparing
resin useful
moulding sand
sand binder
Prior art date
Application number
RO127470A
Other languages
Romanian (ro)
Inventor
Cleopatra Oprea
Jeana Nicoleanu
Ioana Scurtu
Cornelia Ionescu
Costache Ailene
Original Assignee
Institutul Politehnic
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 Institutul Politehnic filed Critical Institutul Politehnic
Priority to RO127470A priority Critical patent/RO97848B1/en
Publication of RO97848B1 publication Critical patent/RO97848B1/en

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Abstract

Prezenta inventie se refera la un procedeu de obtinere a unei rasini lignofenolformaldehidice utilizabile ca liant pentru amestecuri de formare prin reactia în doua trepte, în prima treapta obtinîndu-se un condensat fenol-lignina, care, în continuare, se trateaza cu aldehida formica la 95...98 degree C.The present invention relates to a process for obtaining a ligno-phenol-formaldehyde resin useful as a binder for two-step reaction mixtures, in the first stage obtaining a phenol-lignin condensate, which is further treated with formic aldehyde at 95 ... 98 degrees C.

RO127470A 1987-03-18 1987-03-18 Process for preparing lignoformaldehyde resin useful as moulding sand binder RO97848B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
RO127470A RO97848B1 (en) 1987-03-18 1987-03-18 Process for preparing lignoformaldehyde resin useful as moulding sand binder

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
RO127470A RO97848B1 (en) 1987-03-18 1987-03-18 Process for preparing lignoformaldehyde resin useful as moulding sand binder

Publications (1)

Publication Number Publication Date
RO97848B1 true RO97848B1 (en) 1990-01-30

Family

ID=40905976

Family Applications (1)

Application Number Title Priority Date Filing Date
RO127470A RO97848B1 (en) 1987-03-18 1987-03-18 Process for preparing lignoformaldehyde resin useful as moulding sand binder

Country Status (1)

Country Link
RO (1) RO97848B1 (en)

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