Phenol-formaldehyde resin by colophony modified with alkyl phenol being mixed and its preparation method

Abstract

A rosin-modified mixed alkylphenol phenolic resin and a preparation method thereof, which is a mixed alkylphenol obtained by reacting p-tert-octylphenol, p-nonylphenol, dodecylphenol and formaldehyde under alkaline conditions The phenolic resin condensate is prepared after rosin modification and polyol esterification, wherein the polyol esterification is carried out step by step with glycerin and trimethylol propane. The phenolic resin prepared by the invention not only has high softening point, good viscoelasticity, better aliphatic hydrocarbon solubility and oil solubility, but also has light color and narrow molecular weight distribution range, and is suitable for the manufacture of special colored inks for high-speed printing.

Description

1. Technical field [0001] The invention relates to a rosin-modified resin, more specifically, the invention relates to a light-colored rosin-modified phenolic resin suitable for printing ink and paint manufacturing industries. The invention also relates to a method for preparing the resin. 2. Background technology [0002] Rosin-modified phenolic resin is one of the resins widely used in printing ink and paint manufacturing industries, especially the important resins for ink binders. Their quality directly determines the performance of inks, such as printability, drying performance, and film formation. performance and more. [0003] For a long time, ink binder resins are mainly rosin-modified single-alkyl phenolic resins, such as rosin-modified phenol-formaldehyde resins, rosin-modified bisphenol-A phenolic resins, rosin-modified p-tert-butylphenol-formaldehyde resins, rosin-modified Sexual p-tertoctylphenol phenolic resin, etc. These ink binder resins also have the follo...

AI Technical Summary

Problems solved by technology

[0004] 1. The product has few functional groups, and the oil solubility, aliphatic hydrocarbon solubility and viscoelasticity cannot be balanced

The rosin-modified alkylphenol phenolic resin prepared with alkylphenols containing relatively small alkyl groups has poor oil solubility and fat solubility, but the fixing time is short and the gloss is high; rosin prepared with alkylphenols containing relatively large alkyl groups Modified alkylphenol phenolic resin, although oil-soluble and fat-soluble, but the fixation time is long and the gloss is low

[0005] 2. The product has a darker color

Using conventional catalysts to prepare rosin-modified alkylphenol phenolic resin must be esterified at a higher temperature, and the product is prone to high-temperature oxidation and discoloration, resulting in a darker color of the product, which cannot be widely used in special inks such as white and yellow.

[0006] 3. The viscosity is not high enough

[0010] 1. The color of the resin is darker, and the Gardner color number is greater than or equal to No. 11;

[0011] 2. The solubility of aliphatic hydrocarbons is not large enough, and the n-heptane value is ≤7.5mL / 2g;

[0012] 3. Although the viscosity of the resin is large and the molecular weight is large, the molecular weight distribution range is wide

[0013] The above deficiencies have affected the application of rosin-modified mixed alkylphenolic resins to a certain extent, especially in the application of light-colored inks and coatings.