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High-solid low-viscosity alkyd resin for removing odor and preparation method of alkyd resin

A clean-odor alkyd resin, high-solid low-viscosity technology, applied in coatings, polyester coatings, polyurea/polyurethane coatings, etc. It is difficult to solve problems such as wood lacquer, and achieve the effect of excellent adhesion, soft hand feeling and fast drying speed

Inactive Publication Date: 2018-03-23
UNION FOSHAN CHEM +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0014] Chinese patent CN103965453B separates a kind of preparation method of benzene-free net odor alkyd resin, with fatty acid, polyhydric alcohol, organic acid, esterification catalyst, reflux solvent and diluent solvent as raw materials, adopts environment-friendly reflux solvent dimethylcyclohexane Alkane and dearomatization solvent D40 synthesized a net odor alkyd resin with a solid content of 70-75%; but the resin has a low solid content and it is difficult to achieve low-VOC and high-solid wood lacquers
[0015] It can be seen from the above that the solid content of the current synthetic alkyd resin or net-odor alkyd resin is mostly about 70%, which is difficult to meet the requirements of high-solid coating technology; technical requirements

Method used

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  • High-solid low-viscosity alkyd resin for removing odor and preparation method of alkyd resin
  • High-solid low-viscosity alkyd resin for removing odor and preparation method of alkyd resin

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] A high-solid and low-viscosity net-odor alkyd resin, the preparation process of which is as follows:

[0039] a), by weight percentage, sequentially add 23.5 parts of castor oil, 7.2 parts of isophthalic acid, 26.5 parts of phthalic anhydride, 3.0 parts of adipic acid, 10 parts of glycerin, 5 parts of trimethylolpropane, 1,4-butanediol Add 4.5 parts into the reaction kettle, start heating, when the material in the kettle is completely melted, feed N 2 , start stirring and raise the temperature to 120°C, add 0.5 part of organotin catalyst, then raise the temperature to 165°C~180°C, add 6.0 parts of benzoic acid and 3.5 parts of reflux solvent, keep the reaction for 2~3 hours, and remove the water brought out by the reflux reaction 6.2 parts, and the cooled reflux solvent is transported to the top of the packed tower with a circulation pump and gets back to the reactor;

[0040] b), when the separated water is very little, add C 10 10.0 parts of glycidyl tert-carbonate ...

Embodiment 2

[0043] A high-solid and low-viscosity net-odor alkyd resin, the preparation process of which is as follows:

[0044] a), by weight percentage, sequentially add 25.0 parts of soybean oil, 18.0 parts of phthalic anhydride, 12.0 parts of adipic acid, 4.5 parts of maleic anhydride, 12 parts of glycerin, 5.2 parts of trimethylolpropane, and 4.0 parts of neopentyl glycol into the In the reaction kettle, start heating, when the material in the kettle is completely melted, feed N 2 , start stirring and raise the temperature to 120°C, add 0.4 parts of rare earth catalyst, then raise the temperature to 165°C~180°C, add 6.0 parts of benzoic acid and 3.2 parts of reflux solvent, keep the reaction for 2~3h, and remove 5.8 parts of water brought out by the reflux reaction Parts, and the cooled reflux solvent is transported to the top of the packed tower with a circulation pump and returned to the reactor;

[0045] b), when the separated water is very little, add C 10 8.0 parts of glycidyl...

Embodiment 3

[0048] A high-solid and low-viscosity net-odor alkyd resin, the preparation process of which is as follows:

[0049] a), by weight percentage, sequentially add 22.6 parts of soybean oil, 24.0 parts of phthalic anhydride, 7.8 parts of terephthalic acid, 4.2 parts of adipic acid, 13.5 parts of trimethylolpropane, and 6.0 parts of 1,6-hexanediol into In the reaction kettle, start heating, when the material in the kettle is completely melted, feed N 2 , start stirring and raise the temperature to 120°C, add 0.4 parts of organotin catalyst, then raise the temperature to 165°C~180°C, add 6.0 parts of benzoic acid and 3.0 parts of reflux solvent, keep the reaction for 2~3h, and remove the water brought out by the reflux reaction 6.0 parts, and the cooled reflux solvent is transported to the top of the packed tower with a circulating pump and gets back to the reactor;

[0050] b), when the separated water is very little, add C 10 12.0 parts of glycidyl tert-carbonate and 4.0 parts o...

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Abstract

The invention relates to high-solid low-viscosity alkyd resin for removing odor. The alkyd resin is prepared from a vegetable oil fatty acid, an organic acid anhydride, benzoic acid, a polyhydric alcohol, an esterification catalyst, glycidyl tertiary carbonate, a reflux solvent and a diluting solvent through a step-by-step polycondensation reaction. The invention also provides a preparation methodof the high-solid low-viscosity alkyd resin for removing odor. The alkyd resin prepared by the invention is free of benzene and ketone, has a solid content of 93+ / -2%, viscosity (Gardner-Holdt tube / 25 DEG C) of less than or equal to 10s, an acid value of less than or equal to 8mg KOH / g, a hydroxyl value of larger than or equal to 135mg KOH / g and a number-average molecular weight Mn of 2200-3000,has excellent adhesive force, water resistance, chemical resistance, wear resistance and scratch resistance, and has the characteristics of high solvent volatilization speed, high drying speed and thelike in the film forming process. The leveling property and the transparency of a coated film are good; no solvent is left after the film is coated for 24 hours; and the odor removing effect is achieved. The alkyd resin is widely applied to surface decoration and protection of products such as woodware, metals, plastics and the like.

Description

technical field [0001] The invention relates to an alkyd resin, in particular to a high-solid, low-viscosity, clean-odour alkyd resin and a preparation method thereof, belonging to the technical field of synthetic resins. Background technique [0002] Alkyd resin is an important coating resin, which is synthesized by polyhydric alcohol, polybasic acid and fatty acid through esterification and polycondensation reaction; alkyd resin is a kind of synthetic resin widely used in coatings, and it is also the most widely used synthetic resin in my country at present. One of the resins, it is cheap, easy to construct, rich in raw materials, can be dissolved in a variety of organic solvents, and is suitable for surface coating of all wood and metal. [0003] Due to its structural characteristics, alkyd resin makes the final coating film plump, bright, and can be cross-linked with oxygen, making it self-drying and versatile and widely used. Before the 1970s, alkyd resin was used in my ...

Claims

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Application Information

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IPC IPC(8): C08G63/49C08G63/84C08G63/85C09D167/08C09D175/14
CPCC08G63/48C08G63/84C08G63/85C09D167/08C09D175/14
Inventor 许钧强张武康伦国姚东生郭红桥孙小光
Owner UNION FOSHAN CHEM
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