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A sun-resistant and water-resistant polyester resin and its production process

A polyester resin and production process technology, applied in the field of additives for preparing coatings, can solve problems such as single synthesis method, and achieve the effects of improving UV resistance, plump paint film and good molding effect

Active Publication Date: 2016-04-27
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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  • A sun-resistant and water-resistant polyester resin and its production process

Examples

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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 a sun-resistant and water-resistant polyester resin and its production process. The process is as follows: esterify purified terephthalic acid and neopentyl glycol → polycondense → vacuumize, dehydrate → capping → filter →Cooling→Crushing→Packing and warehousing, and then obtained. The characteristic parameters of the polyester resin are as follows: acid value 48-55mgKOH / g, softening point 100-115°C, viscosity 100-200 poise (165°C), curing condition 200°C / 10min, the mass ratio of polyester resin and epoxy resin in the finished product is 90:10; What the present invention produces is applicable to the polyester resin of outdoor furniture or outdoor wall, improves its anti-ultraviolet performance by adding isophthalic acid , because the product will be exposed to the outdoors for a long time, the use of isophthalic acid is relatively large. At the same time, the water resistance is increased by adding 2,2,4-trimethyl-1,3-pentanediol as its auxiliary additive. At the same time, it reduces the leveling of the product and the viscosity of the product is low. The forming effect of the paint is good, the paint film is plump, and it is convenient for the painting operation of the finished paint; at the same time, the waste produced by the whole production process is convenient to handle.

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 in...

Claims

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Application Information

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Patent Type & Authority Patents(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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