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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

Inactive Publication Date: 2010-09-15
JIANGMEN PAINT FACTORY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In order to solve the problem of easy yellowing of existing alkyd resins under high temperature baking, the present invention provides a process for producing alkyd resins using lard

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 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, and 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 xylene with a total dosage of 1 to 2 parts by weight of the formula into the reactor, vacuumize the reactor until the pressure in the reactor is <-0.09MPa, and drain the reactor Oxygen, and then nitrogen;

[0029] 2) Heat the material in the reactor with steam until it can be stirred normally, replace it with heat-conducting oil, gradually heat the material to 230°C in 4 hours, keep warm until the alcohol tolerance is: material in the...

Embodiment 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, and 8 parts by weight of trimethylbenzene , 0.025 parts by weight of hypophosphorous acid, 0.045 parts by weight of octadecyl 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 xylene with a total dosage of 1 to 2 parts by weight of the formula into the reactor, vacuumize the reactor until the pressure in the reactor is <-0.09MPa, and drain the reactor Oxygen, and then nitrogen;

[0038] 2) Heat the material in the reactor with steam until it can be stirred normally, replace it with heat-conducting oil, gradually heat the material to 240°C in 3 hours, keep warm until the alcohol tolerance is: material i...

Embodiment 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 trimethylbenzene , 0.025 parts by weight of hypophosphorous acid, 0.025 parts by weight of octadecyl phosphite, and 0.02 parts by weight of an organotin catalyst.

[0045] The preparation method is as follows:

[0046] 1) Put lard, glycerin, trimethylolpropane, transesterification catalyst, and xylene with a total dosage of 1 to 2 parts by weight of the formula into the reactor, vacuumize the reactor until the pressure in the reactor is <-0.09MPa, and drain the reactor Oxygen, and then nitrogen;

[0047] 2) Heat the material in the reactor with steam until it can be stirred normally, replace it with heat-conducting oil, gradually heat the material to 250°C in 4 hours, keep warm until the alcohol tolerance is: material in t...

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Abstract

The invention discloses alkyd resin for amino baking finish and a preparation method thereof. The alkyd resin is prepared from raw materials of lard, trimethylolpropane, glycerol, phthalic anhydride, benzoic acid, xylene and diluent. The preparation method comprises the following steps of: mixing the raw materials, heating and reacting, then diluting and filtering to prepare the alkyd resin. The alkyd resin of the invention and butylated melamine-formaldehyde resin are matched and added with other raw materials to prepare the amino baking finish; and an amino baking finish coating has good adhesion force, high hardness, wearing resistance, impact resistance, difficult yellowing, good weather resistance, good flexibility as well as good construction and levelling performance and can be both sprayed and brushed for coating.

Description

technical field [0001] The invention relates to an alkyd resin for amino baking varnish, and also relates to a preparation method of the resin. Background technique [0002] The existing commercially available alkyd resins for amino baking varnishes are mostly prepared from soybean oil supplemented with other raw materials. This alkyd resin is usually formulated with butanol-etherified melamine-formaldehyde resin and other raw materials to form a white paint. The yellowing phenomenon occurs when the white paint is baked at ≥120°C, which greatly affects the decorative effect of the baked paint. [0003] There are also alkyd resins used for some amino baking paints, which are prepared by using coconut oil supplemented with other raw materials. This alkyd resin is formulated to obtain white paint. Although it will not produce yellowing when baked at ≥ 120 ° C, the impact resistance of the paint film Sex is not good. [0004] Although the above-mentioned alkyd resins for amino...

Claims

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Application Information

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IPC IPC(8): C08G63/49C09D167/08C09D5/28
Inventor 陈秉森谭兆强
Owner JIANGMEN PAINT FACTORY
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