Patent GB-817741-A (GB)
Title: Rosin compositions substantially stabilized against crystallization
Inventor: STRAZDINS EDWARD
IPC: C08L93/04
Filed: 1956-05-17
Abstract: Rosin compositions stabilized against crystallization comprise a rosin or a liquid rosin size in admixture with a condensation product of the rosin with a saligenin.  The rosin may be gum rosin, wood rosin, tall oil rosin, or "fortified" rosin and may subsequently be converted to an aqueous rosin size for paper manufacture by reaction with an aqueous solution of alkali. Suitable saligenins include saligenin itself (o-hydroxy benzyl alcohol), alkyl saligenins such as p-iso-octyl- and p-iso-nonyl saligenin, aryl saligenins, alkyl aryl saligenins, halogen-substituted saligenins, amino - saligenins, nitro saligenins, formyl, acetyl, propionyl, carboxy and sulpho saligenins and esters thereof, acetamido saligenins, and mixtures and polymers thereof; examples include methylol derivatives of p-a -phenyl-ethyl phenol, p-tert butyl-o-cresol, and 2 : 4-xylenol, chlorosaligenin, methoxysaligenin, carbethoxysaligenin, hydroxysaligenin, the partially polymerized resins prepared from phenol and chlorophenol and formaldehyde, and saligenins of the formul  <FORM:0817741/III/1> and <FORM:0817741/III/2> The compositions may be produced by reacting the molten rosin with the saligenin in an amount corresponding to 1/40 to 1/4 mol. per mol. of rosin, at a temperature below that at which esterification takes place, e.g. at 150-200 DEG  C. until the evolution of water ceases.ALSO:Saligenins, including saligenin itself (o-hydroxy benzyl alcohol), alkyl-saligenins such as p-iso-octyl- and p-iso-nonyl saligenin, arylsaligenins, alkyl-aryl-saligenins, halogen-substituted saligenins, amino-saligenins, nitrosaligenins, formyl-, acetyl-, propionyl-, carboxy-and sulpho-saligenins and esters thereof, acetamido-saligenins, and mixtures and polymers thereof, e.g. methylol derivatives of p-a -phenylethyl-phenol, p-tert.-butyl-o-cresol, and 2 : 4-xylenol, chlorosaligenin, methoxysaligenin, carbethoxysaligenin, hydroxysaligenin, the partially polymerized resins prepared from phenol and chlorophenol and formaldehyde, and saligenins of the formul  <FORM:0817741/IV (b)/1> and <FORM:0817741/IV (b)/2> are prepared by reacting a phenol with formaldehyde at an alkaline pH at a temperature of 70-90 DEG  C. From 1 to 2 mols. of formaldehyde (which may be in the form of paraldehyde) may be employed per mol. of phenol.ALSO:Rosin compositions stabilized against crystallization comprise a rosin or a liquid rosin size in admixture with a condensation product of the rosin with a saligenin.  The rosin may be gum rosin, wood rosin, tall oil rosin, or a Diels-Alder compound formed by heating rosin with an unsaturated acid anhydride such as maleic, itaconic or citraconic anhydride, and may subsequently be converted to an aqueous rosin size for paper manufacture by reaction with an aqueous solution of alkali. Suitable saligenins include saligenin itself (o-hydroxy benzyl alcohol), alkyl-saligenins such as p-iso-octyl- and p-iso-nonyl-saligenin, aryl-saligenins, alkyl-aryl-saligenins, halogen-substituted saligenins, amino-saligenins, nitro-saligenins, formyl-, acetyl-, propionyl-, carboxy-and sulpho-saligenins and esters thereof, acetamido-saligenins, and mixtures and polymers thereof; Examples include methylol derivatives of p-a -phenyl-ethyl phenol, p-tert. butyl-o-cresol, and 2 : 4-xylenol, chlorosaligenin, methoxysaligenin, carbethoxysaligenin, hydroxysaligenin, the partially polymerized resins prepared from phenol and chlorophenol and formaldehyde, and saligenins of the formulae: <FORM:0817741/V/1> The compositions may be produced by reacting the molten rosin with the saligenin in an amount corresponding to 1/40 to 1/4 mol. per mol. of rosin, at a temperature below that at which esterification takes place, e.g. at 150 DEG -200 DEG C. until the evolution of water ceases.