Acid alcohol resin for light-smell dope and preparation method of acid alcohol resin

[0023] Example 1

[0024] Add 13.40 parts of coconut oil, 11.66 parts of glycerin and 4.67 parts of trimethylolpropane into a 1000ml four-necked flask equipped with a stirrer, reflux condenser and thermometer, and then pass in nitrogen for protection, start stirring and gradually heat up and wait for the temperature When the temperature is raised to 120°C, 0.01 part of lithium hydroxide is added, then the temperature is raised to 235°C until the alcoholysis is qualified, and the temperature is reduced to 150°C. 1.17 parts of dimer acid, 0.77 parts of succinic acid, 0.58 parts of maleic anhydride, 11.66 parts of phthalic anhydride, 11.66 parts of phthalic acid, 2.33 parts of terephthalic acid, 1.75 parts of triethylene glycol, 1.17 parts of neopentyl glycol, 1.17 parts of 2-methyl-1,3-propanediol, 5 parts of xylene, and then heated to 200°C After the reaction reaches the acid value below 18mgKOH/g, the temperature is lowered to 110℃, 33.00 parts of xylene is added, and after stirring, the material is filtered out. The acid value is less than 18mgKOH/g, the non-volatile matter is 60%, and the color is less than 2 (iron-cobalt ratio Colorimeter) alkyd resin for low odor paint.

[0025] Example 2

[0026] Add 21.2 parts of rapeseed oil, 5.3 parts of coconut oil, 5.3 parts of trimethylolethane, and 8.48 parts of pentaerythritol into a 1000ml four-necked flask equipped with a stirrer, reflux condenser and thermometer, and then add carbon dioxide gas for protection and start stirring And gradually heat up, when the temperature rises to 120 ℃, add 0.01 part of sodium hydroxide, then increase the temperature to 240 ℃ to pass alcoholysis, add 1.06 parts of adipic acid, 0.53 parts of sebacic acid, and 15.89 parts of phthalic anhydride when the temperature is reduced to 150 ℃ , 4.77 parts of diethylene glycol, 0.85 parts of neopentyl glycol, 1.59 parts of 1,3-butanediol, 0.85 parts of 1,2-propanediol and 4 parts of xylene, and then heated to 210°C to react to an acid value of 18mgKOH/g Below, the temperature is lowered to 110°C, 15 parts of toluene and 15.17 parts of butyl acetate are added, and the material is filtered after stirring. The acid value is less than 18mgKOH/g, the non-volatile content is 65%, and the color is less than 2 (iron-cobalt colorimeter ) Alkyd resin for low odor paint.

[0027] Example 3

[0028] Add 9.37 parts of soybean oil, 11.11 parts of castor oil, 16.66 parts of trimethylolethane and 2.22 parts of trimethylolpropane into a 1000ml four-necked flask equipped with a stirrer, reflux condenser and thermometer, and pass in carbon dioxide gas for protection , Start stirring and gradually heat up. When the temperature rises to 120°C, add 0.02 parts of calcium hydroxide, then increase the temperature to 245°C until the alcoholysis is qualified, and add 29.3 parts of phthalic anhydride and 2.22 parts of neopentyl glycol to 150°C. 4 parts of toluene, then heated to 220°C and reacted to an acid value below 18mgKOH/g, cooled to 130°C, added 12.9 parts of xylene and 12.2 parts of butyl acetate, stirred well and filtered out the material to obtain an acid value of less than 18mgKOH/g. The non-volatile content is 70%, and the color is less than 2# (iron-cobalt colorimeter) alkyd resin for low-odor coatings.