Institutul De Cercetare Stiintifica Si Inginerie Tehnologica Pentru Electrotehnica
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Organic Low-Molecular-Weight Compounds And Preparation Thereof
(AREA)
Abstract
Prezenta inventie se refera la un procedeu pentru obtinerea de lacuri fenoloformaldehidice, cu un continut ridicat în legaturi orto-orto', destinat pentru fabricarea de materiale cu înalte caracteristici electrice si mecanice si consta în condensarea formaldehidei cu fenol la un raport molar formaldehida/fenol de 1,6...1,8 si la o temperatura de 75 degree C.The present invention relates to a process for the production of phenol-formaldehyde lakes with a high ortho-ortho-bonded content for the manufacture of materials having high electrical and mechanical characteristics and consisting of condensation of formaldehyde with phenol at a formaldehyde / 1.6 ... 1.8 and at a temperature of 75 degrees C.
RO127920A1987-04-211987-04-21Process for preparing electroinsulating laquers
RO97955B1
(en)