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Alkyd resin and preparation method thereof

A technology of alkyd resin and acid value, which is applied in the field of synthetic alkyd resin, which can solve the problems of increased processing cost, easy volatilization of alcohols, low raw material utilization rate and yield, so as to reduce post-processing cost and improve raw material utilization efficiency and reduce production costs

Active Publication Date: 2015-03-04
山东齐鲁漆业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, in order to reduce costs, most processes use PTA waste instead of phthalic anhydride to react with traditional polyols to produce alkyd resins. However, due to the high melting point of PTA and slow reaction, it requires higher When reacting with traditional polyols such as ethylene glycol, glycerol, pentaerythritol and other alcohols, the alcohols are easy to volatilize, which not only causes the disadvantages of low raw material utilization and yield, but also easily causes pipeline clogging, increasing processing costs

Method used

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  • Alkyd resin and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0022] A kind of alkyd resin, by weight, its raw material is composed of: 1 part of cotton oleic acid, 1.5 parts of waste terephthalic acid, 2 parts of sorbitol aqueous solution, 0.020 part of xylene, 4 parts of 200# solvent oil;

[0023] The acid value of the waste terephthalic acid is greater than 650mgKOH / g;

[0024] Described sorbitol aqueous solution refers to the sorbitol aqueous solution that massfraction is 85%;

[0025] The acid value of the cotton oleic acid is 200mgKOH / g;

[0026] Its concrete preparation steps are:

[0027] (1) Under anaerobic conditions, add cottonoleic acid, sorbitol aqueous solution, and phthalic acid waste in proportion to the reactor;

[0028] (2) Heat up to 125°C, start stirring and continue to heat up to 240°C, keep warm for 1h;

[0029] (3) Cool down to 220°C, add xylene in proportion, heat up to 260°C and reflux for 3 hours, until the acid value of the resin reaches 18mgKOH / g, mix the reaction product with 200# solvent oil at a mass rat...

Embodiment 2

[0032] An alkyd resin, whose raw materials are composed of 0.5 parts of rapeseed acid, 1.3 parts of waste terephthalic acid, 1.2 parts of sorbitol aqueous solution, 0.015 parts of xylene, and 3 parts of 200# solvent oil in parts by weight.

[0033] The acid value of the waste terephthalic acid is greater than 650mgKOH / g.

[0034] Described sorbitol aqueous solution refers to the sorbitol aqueous solution that mass fraction is 70%.

[0035] The acid value of the rapeseed acid is 195mgKOH / g.

[0036] Its concrete preparation steps are:

[0037] (1) Under anaerobic conditions, add rapeseed acid, sorbitol aqueous solution, and phthalic acid waste into the reaction kettle in proportion;

[0038] (2) Heat up to 100°C, start stirring and continue to heat up to 270°C, keep warm for 2 hours;

[0039] (3) Cool down to 210°C, add xylene in proportion, heat up to 265°C and reflux for 1.5h until the acid value of the resin reaches 19mgKOH / g, mix the reaction product with 200# solvent oi...

Embodiment 3

[0042] A kind of alkyd resin, its raw material composition is by weight: 2.5 parts of soybean oil, 2.8 parts of waste terephthalic acid, 2.5 parts of sorbitol aqueous solution, 0.025 parts of xylene, 5 parts of 200# solvent oil.

[0043] The acid value of the waste terephthalic acid is greater than 650mgKOH / g.

[0044] Described sorbitol aqueous solution refers to the sorbitol aqueous solution that mass fraction is 100%.

[0045] The acid value of the soy oil is 205mgKOH / g.

[0046] Its concrete preparation steps are:

[0047] (1) Under anaerobic conditions, add soybean oil acid, sorbitol aqueous solution, and phthalic acid waste into the reaction kettle in proportion;

[0048] (2) Heat up to 150°C, start stirring and continue to heat up to 290°C, keep warm for 3h;

[0049](3) Cool down to 200°C, add xylene in proportion, heat up to 260-275°C and reflux for 2 hours until the acid value of the resin reaches 15mgKOH / g, mix the reaction product with 200# solvent oil at a mass ...

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Abstract

The invention belongs to the technical field of polymer synthesis and particularly relates to an alkyd resin synthesized by sorbitol and phthalic acid waste materials. The alkyd resin comprises components in parts by weight as follows: 0.5 parts to 2.5 parts of vegetable oil acid, 1.3 parts to 2.8 parts of a terephthalic acid waste material, 1.2 parts to 2.5 parts of a sorbitol water solution, 0.012 parts to 0.025 parts of dimethylbenzene and 3 parts to 5 parts of 200# solvent oil. According to the alkyd resin and a preparation method thereof, the terephthalic acid waste material is replaced by phthalic anhydride to react with the sorbitol with a high boiling point to be synthesized into the alkyd resin, the production cost is reduced, energy conservation and environment protection are achieved, the material utilization ration is improved, the post-processing cost is reduced, performances of the prepared alkyd resin are good, prior relevant technical indexes of alkyd resins can be completely achieved, and application conditions of the resin are met.

Description

technical field [0001] The invention belongs to the technical field of polymer synthesis, and in particular relates to a method for synthesizing alkyd resin by using sorbitol and terephthalic acid (PTA) waste materials. Background technique [0002] Alkyd resin is mainly used in paints and coatings, and is widely used in metal protection, furniture, vehicles, construction, etc. It can also be used as the insulating layer of enameled wires, and the ink made into it is widely used in the printing industry. In addition, it is also used in the manufacture of molded plastics . Alkyd resin is the main film-forming substance of traditional blending paints and enamel paints. It has the characteristics of good weather resistance, good adhesion, brightness and fullness, and is convenient for construction. Dry enamel, primer, topcoat and varnish are widely used in the coating of buildings such as bridges and machinery, vehicles, ships, aircraft and instruments. [0003] At present, i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G63/49C08G63/78
Inventor 孙洪源隋春喜孙文俊孙亮闫红霞段洪东王庆军
Owner 山东齐鲁漆业有限公司