RO84113B1 - Process for preparing a carbamide-formic aldehyde pre-condensed product with solid substance high content for wood semiproducts - Google Patents

Process for preparing a carbamide-formic aldehyde pre-condensed product with solid substance high content for wood semiproducts

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Publication number
RO84113B1
RO84113B1 RO107313A RO10731382A RO84113B1 RO 84113 B1 RO84113 B1 RO 84113B1 RO 107313 A RO107313 A RO 107313A RO 10731382 A RO10731382 A RO 10731382A RO 84113 B1 RO84113 B1 RO 84113B1
Authority
RO
Romania
Prior art keywords
wood
semiproducts
carbamide
preparing
high content
Prior art date
Application number
RO107313A
Other languages
Romanian (ro)
Other versions
RO84113A2 (en
Inventor
Cornelia Maier
Ioan Florea
Original Assignee
Combinatul Chimic "Victoria"
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 Combinatul Chimic "Victoria" filed Critical Combinatul Chimic "Victoria"
Priority to RO107313A priority Critical patent/RO84113B1/en
Publication of RO84113A2 publication Critical patent/RO84113A2/en
Publication of RO84113B1 publication Critical patent/RO84113B1/en

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  • Phenolic Resins Or Amino Resins (AREA)

Abstract

Prezenta inventie se refera la un procedeu pentru obtinerea unui precondensat ureoformaldehidic cu continut ridicat în substanta acida pentru semifabricate din lemn, caracterizat prin aceea ca efectueaza reactia între paraformaldehida umectata, cu concentratie 85...92%, si uree solida, la un raport molar de 4,4...6,5 mol formaldehida pentru 1 mol uree, la o temperatura cuprinsa între 80 si 98 degree C, de preferinta între 88 si 94 degree C si pH cuprins între 7,5 si 10, de preferinta între 8,5 si 9,5, timp de 15...70 min.The present invention relates to a process for obtaining a high formaldehyde-containing urea formaldehyde precondensation for wood semifinished products, characterized in that it performs the reaction between 85 ... 92% of wetted paraformaldehyde and solid urea at a molar ratio of 4,4 ... 6,5 moles of formaldehyde for 1 mole of urea at a temperature of between 80 and 98 degrees C, preferably between 88 and 94 degrees C, and a pH of between 7.5 and 10, preferably between 8 , 5 and 9.5, for 15 ... 70 min.

RO107313A 1982-04-21 1982-04-21 Process for preparing a carbamide-formic aldehyde pre-condensed product with solid substance high content for wood semiproducts RO84113B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
RO107313A RO84113B1 (en) 1982-04-21 1982-04-21 Process for preparing a carbamide-formic aldehyde pre-condensed product with solid substance high content for wood semiproducts

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
RO107313A RO84113B1 (en) 1982-04-21 1982-04-21 Process for preparing a carbamide-formic aldehyde pre-condensed product with solid substance high content for wood semiproducts

Publications (2)

Publication Number Publication Date
RO84113A2 RO84113A2 (en) 1984-05-12
RO84113B1 true RO84113B1 (en) 1984-06-30

Family

ID=20111413

Family Applications (1)

Application Number Title Priority Date Filing Date
RO107313A RO84113B1 (en) 1982-04-21 1982-04-21 Process for preparing a carbamide-formic aldehyde pre-condensed product with solid substance high content for wood semiproducts

Country Status (1)

Country Link
RO (1) RO84113B1 (en)

Also Published As

Publication number Publication date
RO84113A2 (en) 1984-05-12

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