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Alkyd resin for amino baking finish and preparation method thereof

A technology of alkyd resin and amino baking paint, applied in the direction of coating, polyester coating, etc., can solve the problem of easy yellowing of alkyd resin, and achieve the effect of good impact resistance, wide application range and excellent performance

Inactive Publication Date: 2012-02-29
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, 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 tolerance is: materials i...

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, 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: materials in the ...

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 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: materials in the kettle: ...

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

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G63/49C09D167/08C09D5/28
Inventor 陈秉森谭兆强
Owner JIANGMEN PAINT FACTORY