| http://www.w3.org/ns/prov#value | - e obtained by distillation of petroleum, but which may contain minor amountsof aromatics or naphthenes.As modified phenol- or cresol formaldehyde resin are used the conventional resins of this type, it being preferably modified with colophony and most preferably subsequently further esterified with a polyhydric alcohol, such as glycerol,pentaerytritol, sorbitol and the like.
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