Isolation of dinuclear dihydroxydiphenylmethanes and trinuclear novolacs (triphenylols) from phenol‐formaldehyde condensations
作者:
W. H. Moss,
Elsie Moss,
期刊:
British Polymer Journal
(WILEY Available online 1969)
卷期:
Volume 1,
issue 1
页码: 29-33
ISSN:0007-1641
年代: 1969
DOI:10.1002/pi.4980010105
出版商: John Wiley&Sons, Ltd
数据来源: WILEY
摘要:
AbstractPrevious work has shown that the intermediates in the formation of resins from phenol and formaldehyde— the 2,2′‐, 2,4′‐ and 4,4′‐dihydroxydiphenylmethanes can only be isolated from the reaction products in small yields and with difficulty.It is now shown that after distillation of excess phenol and formaldehyde from the initial reaction mass at atmospheric pressure, a further high‐temperature steam distillation yields approximately 60% of the remaining product as white crystalline dihydroxydiphenylmethanes, 20% as triphenylols varying from hard crystalline masses to slowly crystallising oils, and 20% of fusible and soluble novolac resin of high melting point.Some lens‐shaped crystals w
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