Preparation method for rosin modified phenolic resin for ink

The invention provides a preparation method for rosin modified phenolic resin for ink. The preparation method comprises the steps that 1, rosin is put into a reaction still, and is heated to 180 DEG C, fumaric acid is added, the temperature continues to rise to 210 DEG C to 215 DEG C, and heat prese...

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Bibliographische Detailangaben
Hauptverfasser:	HU XIAOMING, HUANG HONGXIU, FAN LU, CHEN YUBIN
Format:	Patent
Sprache:	eng
Schlagworte:	ADHESIVES CHEMICAL PAINT OR INK REMOVERS CHEMISTRY COATING COMPOSITIONS, e.g. PAINTS, VARNISHES ORLACQUERS COMPOSITIONS BASED THEREON CORRECTING FLUIDS DYES FILLING PASTES INKS MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS METALLURGY MISCELLANEOUS APPLICATIONS OF MATERIALS MISCELLANEOUS COMPOSITIONS NATURAL RESINS ORGANIC MACROMOLECULAR COMPOUNDS PAINTS PASTES OR SOLIDS FOR COLOURING OR PRINTING POLISHES THEIR PREPARATION OR CHEMICAL WORKING-UP USE OF MATERIALS THEREFOR WOODSTAINS
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Beschreibung
Zusammenfassung:	The invention provides a preparation method for rosin modified phenolic resin for ink. The preparation method comprises the steps that 1, rosin is put into a reaction still, and is heated to 180 DEG C, fumaric acid is added, the temperature continues to rise to 210 DEG C to 215 DEG C, and heat preservation is carried out for 1 h to 1.5 h; 2, pentaerythritol and magnesium oxide are added to the reaction still, the temperature is reduced to 160 DEG C to 170 DEG C, dodecyl phenol and nonylphenol are added according to the molar ratio of 1 to 1.02-1.04, then the temperature continues to be reduced to 130 DEG C to 140 DEG C, paraformaldehyde is added according to the phenolic aldehyde molar ratio of 1 to 2.2-2.3, and heat preservation is carried out for 2 h to 2.5 h; 3, the temperature in the reaction still rises to 260 DEG C to 270 DEG C, heat preservation is carried out, an esterification reaction is conducted till the acid value is smaller than 25 mgKOH/g, low-boiling-point substances are distilled out in a decompression mode, and the rosin modified phenolic resin for the ink is obtained. The obtained resin is high in viscosity, good in solubility, large in molecular weight, even in distribution and suitable for slab offset printing ink.