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Novel Phenol‐Formaldehyde Resins, 1. Novolaks
Author(s) -
Lubczak Renata
Publication year - 2002
Publication title -
macromolecular materials and engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.913
H-Index - 96
eISSN - 1439-2054
pISSN - 1438-7492
DOI - 10.1002/1439-2054(20020901)287:9<619::aid-mame619>3.0.co;2-q
Subject(s) - formaldehyde , phenol , materials science , curing (chemistry) , softening point , organic chemistry , phenol formaldehyde resin , softening , polymer chemistry , composite material , chemistry
New possibilities of preparing phenol‐formaldehyde resins not in direct reactions of the substrates, but in reactions of phenol with multihydroxyl derivatives of some ketones obtained by reacting the latter with excess of formaldehyde are presented. The properties of the new type of products, such as softening point, flow index at 200°C, and time of curing with hexamine were evaluated. The resins contained in their structure fragments of multihydroxyl derivatives of ketones that made them slightly more flexible than classical novolaks.