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Preparation method of rosin modified alkyd resin

An alkyd resin and rosin modification technology, applied in coatings, adhesives, polyester coatings, etc., can solve the problems of poor weather resistance of rosin modified alkyd resin, and achieve the effect of good rigidity and flexibility and excellent weather resistance.

Inactive Publication Date: 2016-05-18
NANJING WUSONG FORESTRY CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of this invention is to provide a kind of preparation method of rosin modified alkyd resin, this method can solve the problem of poor weather resistance of rosin modified alkyd resin

Method used

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  • Preparation method of rosin modified alkyd resin

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Put 500 grams of disproportionated rosin, 60 grams of glycerin, and 25 grams of soybean oil into a 1-liter reactor, control the reaction temperature at 180° C., and perform alcoholysis for 60 minutes to obtain half esters; then add 100 grams of polybasic acid and 0.15 g of catalyst, controlled reaction temperature to 200°C, and esterification reaction for 2.5 hours to obtain rosin-modified alkyd resin.

Embodiment 2

[0019] 1000 grams of disproportionated rosin, 200 grams of glycerin, and 80 grams of soybean oil are dropped into a 5-liter reactor, and the controlled reaction temperature is 220° C., and the alcoholysis reaction is carried out for 30 minutes to obtain a half-ester; then add 250 grams of polybasic acid and 0.4 g of catalyst, the reaction temperature is controlled at 220° C., and the esterification reaction is carried out for 3 hours to obtain a rosin-modified alkyd resin.

Embodiment 3

[0021] 2000 grams of disproportionated rosin, 320 grams of glycerin, and 140 grams of soybean oil are dropped into a 10-liter reactor, and the controlled reaction temperature is 220° C., and the alcoholysis reaction is carried out for 60 minutes to obtain a half ester; then, 500 grams of polybasic acid and 0.9 g of catalyst, the reaction temperature is controlled at 230° C., and the esterification reaction is carried out for 3 hours to obtain a rosin-modified alkyd resin.

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Abstract

The invention discloses a preparation method of rosin modified alkyd resin. The preparation method of the rosin modified alkyd resin comprises the following steps: firstly sequentially adding disproportionated rosin, glycerine and soybean oil into a reaction kettle, and carrying out alcoholysis reaction, so that semi ester is synthesized; then sequentially adding polybasic acid and a catalyst, and carrying out etherification reaction, so that the rosin modified alkyd resin is obtained, wherein the polybasic acid is oxalic acid or citric acid, and the catalyst is zinc oxide. The rosin modified alkyd resin has excellent weather resistance, not only can be applied to the industries of adhesive, paint, printing ink, common coating and the like but also can be taken as a raw material used for preparing exterior wall coating with strong weather resistance.

Description

technical field [0001] The invention relates to the technical field of rosin deep processing, in particular to a preparation method of rosin-modified alkyd resin. Background technique [0002] Rosin-modified alkyd resin is a modified resin made by adding rosin modifier in the preparation process of alkyd resin through chemical reaction. Compared with traditional alkyd resins, rosin-modified alkyd resins are easily soluble in ester solvents, and exterior wall coatings prepared from rosin-modified alkyd resins, pigments and various additives have stronger adhesion. [0003] However, the currently commercially available rosin-modified alkyd resins are all prepared by esterification of a single rosin and a single alcohol during the preparation process, resulting in rosin-modified alkyd resins that are prone to discoloration, brittleness, water resistance, and scrub resistance. The weather resistance properties such as corrosion resistance and stain resistance are not ideal, whi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G63/83C08G63/49C09D167/08C09J167/08
Inventor 刘建军黄宇平陈键泉王尧陈洪黄蕾
Owner NANJING WUSONG FORESTRY CHEM