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Modified alkyd resin and preparation method thereof

A technology of alkyd resin modification, applied in polyester coatings, coatings, etc., can solve the problems of lack of gloss and weather resistance, large amount of oleic acid used, high production cost, etc., achieve low price of finished products, and increase utilization value , Low cost of recycling

Inactive Publication Date: 2013-11-20
TIANCHANG YINHU PAINT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Its production cost is high, and its gloss and weather resistance are lacking
[0004] Chinese patent application 200710022171.4 discloses a water-diluted blend paint base material and its preparation method, which discloses that the base material is mainly composed of 4-6 parts of waste polyester, 2-6 parts of oleic acid, 0.5-1 part of phthalic anhydride, and 0.5-5 parts of pentaerythritol. 1 part and 0.5-2 parts of rosin, the raw material waste polyester can account for 25-80% of the total raw material weight ratio, and the weight ratio of oleic acid can reach 12.5-80% of the total raw material. cost of production

Method used

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  • Modified alkyd resin and preparation method thereof
  • Modified alkyd resin and preparation method thereof
  • Modified alkyd resin and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] (1) Alcoholysis of waste polyester blocks: Place 21 parts of waste polyester blocks in an alcohol solution, heat to cause decomposition reaction, and decompose into terephthalic anhydride and ethylene glycol;

[0038] (2) Alkyd reaction: in (1) add 20 parts of mixed fatty acid, 5 parts of PTA leftovers, 6.5 parts of rosin, 4 parts of pentaerythritol; increase the temperature at a rate of 1.5℃ / min, and turn on the stirrer when the temperature reaches 150℃ , Stir at 2 revolutions / min, continue to heat up to 270°C and heat for 1 hour to obtain a solid alkyd resin; the acid value of the solid alkyd resin is not more than 12 mgKOH / g;

[0039] (3) Dilute: Stir 38 parts of 200# solvent oil in the reaction kettle, then add the solid alkyd resin prepared in (2) to it, stir at 60 revolutions / min for 30 minutes, and filter to obtain modified alkyd resin. Its solid content is 55% and its viscosity is 180s.

Embodiment 2

[0041] (1) Alcoholysis of waste polyester blocks: Place 10 parts of waste polyester blocks in an alcohol solution, heat them to cause decomposition reactions, and decompose them into terephthalic anhydride and ethylene glycol;

[0042] (2) Alkyd reaction: in (1) add 22.8 parts of mixed fatty acid, 5.6 parts of PTA leftovers, 7.6 parts of rosin, 4.3 parts of pentaerythritol; increase the temperature at a rate of 2℃ / min, and turn on the stirrer when the temperature reaches 150℃ , Stir at 1.5 revolutions / min, continue to heat up to 280°C and keep for 1 hour to obtain a solid alkyd resin; the acid value of the solid alkyd resin is not more than 12 mgKOH / g;

[0043] (3) Dilute: Stir 40.5 parts of 200# solvent oil in the reaction kettle, then add the solid alkyd resin prepared in (2) to it, stir at 55 revolutions / min for 35 minutes, and filter to obtain modified alkyd resin. Its solid content is 56% and its viscosity is 200s.

Embodiment 3

[0045] (1) Alkyd reaction: in (1) add 25 parts of mixed fatty acid, 6 parts of PTA leftovers, 8.5 parts of rosin, 5 parts of pentaerythritol; increase the temperature at a rate of 2.5°C / min, and turn on the stirrer when the temperature reaches 150°C , Stir at 2 revolutions / min, continue to heat up to 290°C and keep for 1.5 hours to obtain a solid alkyd resin; the acid value of the solid alkyd resin is not more than 12 mgKOH / g;

[0046] (2) Dilute: Stir 42 parts of 200# solvent oil in the reaction kettle, then add the solid alkyd resin prepared in (2) to it, stir at 50 revolutions / min for 40 minutes, and filter to obtain modified alkyd resin. Its solid content is 56.5% and its viscosity is 300s.

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Abstract

The invention provides modified alkyd resin and a preparation method thereof. The modified alkyd resin is prepared by mixed fatty acid, PTA leftover, rosin, waste polyester blocks, pentaerythritol and a solvent according to the weight part. The modified alkyd resin is formed by adopting industrial waste polyester blocks and trench oil and the like as main materials and carrying out polymerization reaction; the finished product is low in price and good in performance, can replace alkyd resin to be used in the production process of oil paint, has better performances than the alkyd resin in the aspects of weather resistance and gloss of coating film and the like and is a novel material for replacing the alkyd resin to carry out production of the oil paint.

Description

Technical field [0001] The invention relates to the technical field of chemical synthesis, in particular to a modified alkyd resin and a preparation method thereof. Background technique [0002] Alkyd resin coating has the characteristics of weather resistance, good adhesion and bright, plump construction and convenient, but the coating film is soft, and it can be combined with other resins to form a variety of self-drying or baking enamels, primers, and surface Paints and varnishes improve their water resistance and alkali resistance, and are widely used in bridges and other buildings, as well as machinery, vehicles, ships, airplanes, instruments and other technical fields. Alkyd resin coatings are synthetic resin coatings with alkyd resin as the main film-forming material. The product quality and market competitiveness are mainly determined by alkyd resin. [0003] Alkyd resins are oil-modified polyester resins formed by condensation polymerization of polyols, phthalic anhydride...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G63/21C09D167/08
Inventor 孙巨福戴宇钧汪鹏程
Owner TIANCHANG YINHU PAINT
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