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Polyester, aqueous composition including polyester and preparation method of aqueous composition, double-component paint including aqueous composition and preparation method of double-component paint

A water-based composition, polyester technology, applied in polyurea/polyurethane coatings, coatings, etc., can solve problems such as unstable performance

Active Publication Date: 2013-07-24
科思创树脂制造(佛山)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0015] However, there is still a lack of water-based polyester compositions with good hydrolysis resistance to prepare coatings with better performance, and the existing products also have the defect of unstable performance, which cannot fully meet the current diversified needs.

Method used

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  • Polyester, aqueous composition including polyester and preparation method of aqueous composition, double-component paint including aqueous composition and preparation method of double-component paint
  • Polyester, aqueous composition including polyester and preparation method of aqueous composition, double-component paint including aqueous composition and preparation method of double-component paint
  • Polyester, aqueous composition including polyester and preparation method of aqueous composition, double-component paint including aqueous composition and preparation method of double-component paint

Examples

Experimental program
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Effect test

preparation example Construction

[0073] Preparation of aqueous composition: The synthetic components of Examples 1.1, 2.1, 3.1 and Comparative Example 7.1 are shown in Table 3 below.

[0074]

[0075] 1) Put raw materials 1 to 6 in the above table 3 in the reactor, heat up to 160°C rapidly, keep the temperature not exceeding 160°C, and reflux for 1 to 1.5 hours.

[0076] 2) Lower the temperature to 100°C, install a water separator on the reactor, raise the temperature to 220°C at a rate of 10°C per hour, and keep it for 1~2 hours.

[0077] 3) When the acid value of the reaction system (raw material 1~raw material 6) drops to 15~20mgKOH / g polyester (solid) and the temperature drops below 100°C, add raw material 7 and raise the temperature to 200°C, keep The temperature does not exceed 200°C, and the reaction is carried out until the acid value of the reaction system before neutralization reaches 30 mgKOH / g polyester, and the synthesis reaction ends.

[0078] 4) When the reaction temperature drops to 60°C, ...

Embodiment 1

[0096] Embodiment 1.1~1.6 average score is 3 (good);

Embodiment 2

[0097] Embodiment 2.1~2.2 average score is 4 (very good);

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Abstract

The invention provides polyester, which is good in stability, excellent in chemical resistance and capable of improving the safety performance. The polyester disclosed by the invention can be stored for one month or more under a temperature higher than the normal temperature, and therefore, the polyester is beneficial to improving the capacity, planning the product in a more reasonable manner and promoting the improvement of production efficiency. Meanwhile, the invention further provides an aqueous composition including the polyester as well as a double-component paint including the aqueous composition. The quality is better in compassion with the existing product, so that smoothness of a finished product is increased, the surface of the finished product is smoother, and therefore, the practical application and more extensive popularization are facilitated, and a remarkable promoting effect is achieved for promoting the industrial technology progress.

Description

technical field [0001] The invention relates to the technical field of coatings comprising polyesters. In particular, it relates to a polyester, a polyester-containing water-based composition and a preparation method thereof, a two-component coating containing the water-based composition and a preparation method thereof. Background technique [0002] Polyester used in the coatings industry usually refers to a low molecular weight and amorphous (linear or branched) prepolymer prepared by the esterification reaction of polyols and polyacids. The number average molecular weight of polyester is usually 1000~ In the range of 100000g / mol, it is usually divided into saturated polyester and unsaturated polyester. Saturated polyesters include hydroxyl-terminated polyesters and carboxyl-terminated polyesters. Among them, the hydroxyl-terminated polyester can be used to react with amino resin to form a baking paint system, or be used together with polyisocyanate in two-component pain...

Claims

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Application Information

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IPC IPC(8): C08G63/672C08G63/91C08G18/42C09D175/06
Inventor 裴忠华周华李智渊徐正林
Owner 科思创树脂制造(佛山)有限公司
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