Alkyd resin for amino baking finish and preparation method thereof
A technology of alkyd resin and amino baking varnish, which is applied in coatings, polyester coatings, etc., can solve the problems of easy yellowing of alkyd resin, achieve good impact resistance, excellent performance, and wide application range
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[0025] Example 1
[0026] Raw material ratio: 35 parts by weight of lard, 5 parts by weight of trimethylolpropane, 9 parts by weight of glycerin, 20 parts by weight of phthalic anhydride, 5 parts by weight of benzoic acid, 20 parts by weight of xylene, 5 parts by weight of trimethylbenzene , 0.025 parts by weight of hypophosphorous acid, 0.035 parts by weight of triphenyl phosphite, and 0.012 parts by weight of lithium hydroxide.
[0027] The preparation method is as follows:
[0028] 1) Put lard, glycerin, trimethylolpropane, transesterification catalyst and formula total feed amount of 1-2 parts by weight of xylene into the reactor, evacuate until the pressure in the reactor is <-0.09MPa, exclude the reactor Oxygen, and then nitrogen gas;
[0029] 2) Use steam to heat the materials in the reactor until they can be stirred normally. Change to heat-conducting oil. Use 4 hours to gradually heat the materials to 230°C, and keep the temperature for the reaction until the alcohol toleran...
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[0034] Example 2
[0035] Raw material ratio: 26 parts by weight of lard, 5.5 parts by weight of trimethylolpropane, 15 parts by weight of glycerin, 24 parts by weight of phthalic anhydride, 3.5 parts by weight of benzoic acid, 18 parts by weight of xylene, 8 parts by weight of trimethylol , 0.025 parts by weight of hypophosphorous acid, 0.045 parts by weight of stearyl phosphite, and 0.012 parts by weight of lithium hydroxide.
[0036] The preparation method is as follows:
[0037] 1) Put lard, glycerin, trimethylolpropane, transesterification catalyst and formula total feed amount of 1-2 parts by weight of xylene into the reactor, evacuate until the pressure in the reactor is <-0.09MPa, exclude the reactor Oxygen, and then nitrogen gas;
[0038] 2) Use steam to heat the materials in the reactor until they can be stirred normally. Change to heat-conducting oil. Use 3 hours to gradually heat the materials to 240°C, and keep the temperature for reaction until the alcohol tolerance is:...
Example Embodiment
[0043] Example 3
[0044] Raw material ratio: 20 parts by weight of lard, 15 parts by weight of trimethylolpropane, 5 parts by weight of glycerin, 30 parts by weight of phthalic anhydride, 2 parts by weight of benzoic acid, 22 parts by weight of xylene, 6.8 parts by weight of trimethylol , 0.025 parts by weight of hypophosphorous acid, 0.025 parts by weight of stearyl phosphite, and 0.02 parts by weight of organotin catalyst.
[0045] The preparation method is as follows:
[0046] 1) Put lard, glycerin, trimethylolpropane, transesterification catalyst and formula total feed amount of 1-2 parts by weight of xylene into the reactor, evacuate until the pressure in the reactor is <-0.09MPa, exclude the reactor Oxygen, and then nitrogen gas;
[0047] 2) Use steam to heat the materials in the reactor until they can be stirred normally, change to heat transfer oil, gradually heat the materials to 250°C in 4 hours, and keep the temperature for reaction until the alcohol tolerance is: materia...
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