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Anti-sunshine waterproof polyester resin and production process thereof

A polyester resin and production process technology, applied in the field of additives for preparing coatings, can solve problems such as a single synthesis method, and achieve the effects of improving UV resistance, increasing water resistance and anti-fouling, and facilitating painting operations

Active Publication Date: 2014-02-05
滁州市全丰物资有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The synthesis method of ordinary polyester resin is single, only using purified terephthalic acid and neopentyl glycol for synthesis, the overall performance is stable, and it does not have other special functions; while in the coatings used in general outdoor walls or outdoor furniture, it is necessary The coating itself has the properties of water resistance and UV resistance. After adding isophthalic acid, the resulting polyester resin has the function of UV resistance. It needs to be assisted by adding other alcohol compounds to participate in the polycondensation reaction.

Method used

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  • Anti-sunshine waterproof polyester resin and production process thereof

Examples

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Comparison scheme
Effect test

Embodiment 1

[0019] Example 1: The concrete preparation method of the production of a kind of anti-sunlight and water-resistant polyester resin of the present invention is as follows: Esterification: add the purified terephthalic acid and neopentyl glycol that molar mass ratio is 1.08:1 in the reaction kettle successively , the fly reactor uses heat-conducting oil as a carrier, the reaction is gradually heated up, and the temperature reaches 200°C, and the mixture is stirred for 6 hours;

[0020] Polycondensation: After the esterification reaction is completed, lower the reaction temperature, cool to room temperature, let it stand for 10 minutes, and proceed to the heating reaction. When the temperature is lower than 50°C, add a small amount of hypophosphorous acid as an antioxidant for polyester synthesis. The addition amount is 0.1% of the total mass of raw materials, and the mass ratio is 15% of the total reaction mass ratio of isophthalic acid is added under the condition of 150 °C in ...

Embodiment 2

[0030] Example 2: The concrete preparation method of the production of a kind of anti-sunlight and water-resistant polyester resin of the present invention is as follows: Esterification: add the purified terephthalic acid and neopentyl glycol that molar mass ratio is 1.15:1 in the reaction kettle successively , the fly reactor uses heat-conducting oil as a carrier, the reaction is gradually heated up, and the temperature reaches 200°C, and the mixture is stirred for 8 hours;

[0031] Polycondensation: After the esterification reaction is completed, lower the reaction temperature, cool to room temperature, let it stand for 10 minutes, and proceed to the heating reaction. When the temperature is lower than 50°C, add a small amount of hypophosphorous acid as an antioxidant for polyester synthesis. The amount of addition is 0.3% of the total mass of raw materials. Under the condition that the temperature in the reactor is 150°C, isophthalic acid with a mass ratio of 20% of the to...

Embodiment 3

[0041] Example 3:The concrete preparation method of the production of a kind of anti-sunlight and water-resistant polyester resin of the present invention is as follows: Esterification: adding the purified terephthalic acid and neopentyl glycol that the molar mass ratio is 1.12:1 in the reaction kettle successively , the fly reactor uses heat-conducting oil as a carrier, and the reaction is gradually heated up, and mixed and stirred for 7 hours when the temperature reaches 200 ° C;

[0042] Polycondensation: After the esterification reaction is completed, lower the reaction temperature, cool to room temperature, let it stand for 10 minutes, and proceed to the heating reaction. When the temperature is lower than 50°C, add a small amount of hypophosphorous acid as an antioxidant for polyester synthesis. The amount of addition is 0.2% of the total mass of raw materials. Under the condition that the temperature in the reactor is 150°C, isophthalic acid with a mass ratio of 18% of...

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Abstract

The invention discloses anti-sunshine waterproof polyester resin and a production process thereof. The process comprises the following steps that pure terephthalic acid and neopentyl glycol are subjected to esterification, condensation polymerization, vacuumizing and dehydration, end sealing, filtering, cooling, grinding and packaging and storing to obtain the anti-sunshine waterproof polyester resin; the characteristic parameters of the polyester resin are as follows: the acid value is 48-55mg KOH / g, the softening point is 100-115 DEG C, the viscosity is 100-200P (165 DEG C), the curing condition is 200 DEG C per 10 minutes, and the mass ratio of polyester resin to epoxy resin in the finished product is 90:10. The polyester resin disclosed by the invention is suitable for outdoor furniture or outdoor walls; the anti-ultraviolet property is improved by adding isophthalic acid; since the product is exposed outdoors for long time, the usage amount of the isophthalic acid is relatively large; meanwhile, by adding 2,2,4-trimethyl-1,3-pentanediol as an auxiliary additive of the isophthalic acid, the waterproof anti-stain performance is improved, the leveling property of the product is reduced at the same time, and the viscosity of the product is relatively low; the forming effect of the coating is good, the paint film is full, and the brushing operation of the finished product of the coating is convenient; meanwhile, the waste generated in the whole production process is convenient to treat.

Description

technical field [0001] The invention relates to the field of additives for preparing coatings, and relates to a production process for sun-resistant and water-resistant polyester resins. Background technique [0002] Polyester resins for coatings generally do not form films alone, and are mainly used to configure polyester-amino baking varnishes, polyester polyurethane paints, polyester powder coatings and unsaturated polyester paints, which belong to medium and high-grade coatings. High gloss, good fullness, strong weather resistance, and also has good adhesion, hardness, impact resistance, gloss retention, color retention, high temperature resistance to yellowing, etc. At the same time, due to the simple synthesis of polyester resin There are many types of polymers, large choices, and mature macromolecular formula design theory, which can be modified by acrylic resin, epoxy resin, silicone resin and fluororesin. Therefore, the position of polyester resin in the coatings i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G63/183C08G63/181C08G63/16C08G63/91C08G63/78C08K3/32C09D167/02
Inventor 戈建伦徐军
Owner 滁州市全丰物资有限公司
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