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Method for preparing modified alkyd resin by utilizing polyester yarn slice

A technology of alkyd resin and polyester yarn, applied in coatings, anti-corrosion coatings, polyester coatings, etc., can solve the problems of hidden safety hazards, high raw material costs, high energy consumption, etc., to save production costs, improve the working environment, and facilitate recycling The effect of using

Active Publication Date: 2013-05-08
河北德大新材料股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the production of alkyd resin is mainly made by the polymerization of vegetable oil or vegetable oleic acid with polyols and polyacids or phthalic anhydride. Due to the high cost of raw materials, the lack of competitiveness of products has become a common problem in this industry.
In order to reduce costs, polyester filament flakes are used instead of phthalic anhydride to manufacture alkyd resins at home and abroad. In the above process, it is usually necessary to carry out acidolysis reaction with high acid value (AV≥190mgKOH / g) at a high temperature of 270°C. High energy consumption, relatively high requirements for reaction equipment and heating devices, and cause the temperature around the reaction equipment to remain high for a long time, and the smell is strong, resulting in a poor working environment for operators, and there are certain safety hazards in actual production

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Raw material and parts by weight thereof are used in our institute's embodiment:

[0019] Acidified oil 162.4, silicone oil 0.0014, rosin 84.9, maleic anhydride 6.5, waste polyester filament 114.6, pentaerythritol 31.2, zinc oxide 0.32, xylene for reflux esterification 15, xylene for dilution 22.3, and dilution 200# Mineral spirit 264.8. Total: 706.0214 parts by weight.

[0020] The technical process of preparing alkyd resin with waste polyester flakes in this embodiment is:

[0021] (1) Preparation of acidified oil:

[0022] a. Import vegetable oil leftovers—soybean oil saponins into the processing pool, heat with steam at the bottom, start stirring, raise the temperature to 60~90°C, and slowly spray concentrated sulfuric acid (mass concentration of 0.5~5.5% of soybean oil saponin) on the pool surface 98%), start the exhaust, stop spraying concentrated sulfuric acid when the reactant in the pool changes from viscous to black and red and thin, stop the steam agitatio...

Embodiment 2

[0034] Raw material and parts by weight thereof are used in our institute's embodiment:

[0035] Acid oil 164, silicone oil 0.0014, rosin 84, maleic anhydride 6, waste polyester filament sheet 118.3, pentaerythritol 35.1, zinc oxide 0.27, xylene for reflux 19, xylene for dilution 22.7, solvent oil for dilution 200# 270. Total: 719.3714.

[0036] Process flow:

[0037] (1) Preparation of acidified oil:

[0038] a. Import vegetable oil leftovers—soybean oil saponins into the processing pool, heat with steam at the bottom, start stirring, raise the temperature to 60~90°C, and slowly spray concentrated sulfuric acid (mass concentration of 0.5~5.5% of soybean oil saponin) on the pool surface 99%), start the exhaust, stop spraying concentrated sulfuric acid when the reactant in the pool changes from viscous to black red and thin, stop the steam agitation heating and stirring after fully stirring, let stand for 24~48 hours, and separate layers;

[0039] b. Pump the upper layer oi...

Embodiment 3

[0049] One, the raw materials and parts by weight of the embodiment are:

[0050] Acidified oil 190.6, silicone oil 0.0008, rosin 39.5, maleic anhydride 8.7, waste polyester filament flakes 132.4, pentaerythritol 26.8, zinc oxide 0.37, xylene 19 for reflux, 200# solvent oil 307.81 for dilution.

[0051] 2. Process flow:

[0052] (1) Preparation of acidified oil, same as in Example 1.

[0053] (2) Add acidified oil, silicone oil, and rosin into the reaction kettle to pass nitrogen, raise the temperature and start stirring. When the temperature rises to 135°C, add maleic anhydride, continue to heat up to 195°C-200°C and keep it warm for 1 hour, then stop stirring.

[0054] (3) Add waste polyester filaments, continue to heat up, and stir slightly. When the temperature rises to 248-250°C, start stirring and keep warm for 1.5-2.5 hours. After the reaction solution is decomposed to transparent, cool down to 230°C and add pentaerythritol and zinc oxide. Raise the temperature to 210...

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Abstract

The invention discloses a method for preparing modified alkyd resin by utilizing polyester yarn slice. The method comprises the following steps of: carrying out acidifying, neutralizing by alkalifying and purifying by degreasing on soya-bean oil saponin waste of a plant oil factory to prepare acidified oil; then carrying out addition reaction in the acidified oil with maleic anhydride and rosin to generate ternary acid; carrying out acidolysis on the ternary acid and waste polyester yarn or waste polyester slice at the temperature of 248-255 DEG C under the condition that the ternary acid andmonoacid coexist; and then adding polyalcohol and a catalyst, simultaneously carrying out alcoholysis and esterification reaction to obtain the modified alkyd resin. By adopting the method disclosed by the invention, working hour is shortened, working process is simplified, energy source is saved, and production efficiency is improved.

Description

technical field [0001] The invention belongs to the technical field of fine chemicals, and relates to a method for manufacturing modified alkyd resin by using waste polyester flakes, which are leftovers from textile mills. Background technique [0002] Alkyd resin occupies an important position in coating products, and it is one of the main film-forming substances of many coatings such as alkyd, amino, nitro, polyurethane, etc. The quality of the alkyd resin plays a crucial role, even decisive, in the quality of the formulated coating. [0003] At present, the production of alkyd resin is mainly made by polymerizing vegetable oil or vegetable oleic acid with polyols and polyacids or phthalic anhydride. The lack of competitiveness of products due to high raw material costs has become a common problem in this industry. In order to reduce costs, polyester filament flakes are used instead of phthalic anhydride to manufacture alkyd resins at home and abroad. In the above proces...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G63/688C08G63/49C09D167/08C09D5/08
Inventor 张家滔张遵德
Owner 河北德大新材料股份有限公司
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