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Preparation method of maleopimaric double-component waterborne polyurethane

A technology of maleopimaric acid and water-based polyurethane, applied in the field of coatings, can solve the problems of high viscosity of polyester, high reaction temperature, serious steric effect, etc., achieve the effects of green environmental protection cost, increase drying time, and improve comprehensive performance

Active Publication Date: 2015-06-24
INST OF CHEM IND OF FOREST PROD CHINESE ACAD OF FORESTRY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, because the molecular skeleton of rosin is large and the steric hindrance effect is serious, the reaction temperature required for esterification polymerization is relatively high, and the viscosity of the synthesized polyester is relatively high.
When rosin is introduced into one-component water-based polyurethane in the form of polyester polyol, the required polyester polyol is prepared by the reaction of rosin derivatives and small molecule diols, without considering water dispersibility, but introduced into two-component The polyester polyol required in water-based polyurethane is prepared by the reaction of rosin derivatives with other acid components, alcohol components and hydrophilic monomers, and must be water-dispersible. Compared with one-component water-based polyurethane As far as the polyester polyols required in the medium are concerned, the viscosity of the polyester polyols required in the two-component waterborne polyurethane medium should not be too high otherwise it will affect the subsequent dispersion process, and there are more factors affecting the synthesis process conditions, so the synthesis is more difficult. difficulty
At present, the research on the preparation of two-component waterborne polyurethane coatings by using rosin polyester polyol aqueous dispersion has not been reported

Method used

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  • Preparation method of maleopimaric double-component waterborne polyurethane
  • Preparation method of maleopimaric double-component waterborne polyurethane
  • Preparation method of maleopimaric double-component waterborne polyurethane

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] 40 parts of neopentyl glycol, 2.5 parts of isophthalic acid-5-sodium sulfonate, and 0.1 part of monohydroxybutyltin oxide were added to the reaction vessel, under N 2 Under protection, the temperature was raised to 190° C. at a rate of 1° C. / min, and kept for 50 minutes to obtain a hydrophilic polyester intermediate (HPI). When the above reaction system was cooled to 150°C, 9.2 parts of maleopimaric acid, 40 parts of isophthalic acid, 30 parts of adipic acid, and 10 parts of trimethylolpropane were added, and the temperature was raised to 210 at a rate of 0.5°C / min. ℃, keep warm for 70min, then add 7 parts of xylene to the reaction system, reflux reaction at 210℃ for 160min, when the temperature drops to 150℃, start to raise the temperature to 190℃ at a heating rate of 4℃ / min, and depressurize at the same time Vacuumize to produce maleopimaric acid polyester polyol (MPP). At 60°C, add mass sum to 80 parts of diethylene glycol monoethyl ether acetate and water (the mass...

Embodiment 2

[0035] 55 parts of neopentyl glycol, 4 parts of isophthalic acid-5-sodium sulfonate, and 0.25 parts of monohydroxybutyltin oxide were added to the reaction vessel, under N 2 Under protection, the temperature was raised to 210° C. at a rate of 1° C. / min, and kept for 20 minutes to obtain a hydrophilic polyester intermediate (HPI). When the above reaction system was cooled to 150°C, 43 parts of maleopimaric acid, 25 parts of isophthalic acid, 20 parts of adipic acid, and 7 parts of trimethylolpropane were added, and the temperature was raised to 240 at a rate of 0.5°C / min. ℃, keep warm for 40min, then add 5.5 parts of xylene to the reaction system, reflux reaction at 240℃ for 130min, when the temperature drops to 140℃, start to raise the temperature to 190℃ at a rate of 4℃ / min, and decompress while heating Vacuumize, cool down and discharge, and make maleopimaric acid polyester polyol (MPP). At 90°C, add mass sum to 110 parts of diethylene glycol monoethyl ether acetate and wat...

Embodiment 3

[0039] 45 parts of neopentyl glycol, 3 parts of isophthalic acid-5-sodium sulfonate, and 0.15 parts of monohydroxybutyltin oxide were added to the reaction vessel, under N 2 Under protection, the temperature was raised to 200° C. at a rate of 1° C. / min, and kept for 35 minutes to obtain a hydrophilic polyester intermediate (HPI). When the above reaction system was cooled to 150°C, 19 parts of maleopimaric acid, 35 parts of isophthalic acid, 25 parts of adipic acid, and 9 parts of trimethylolpropane were added, and the temperature was raised to 220 at a rate of 0.5°C / min. ℃, keep warm for 60min, then add 6 parts of xylene to the reaction system, reflux reaction at 220℃ for 150min, when the temperature drops to 150℃, start to raise the temperature to 190℃ at a heating rate of 4℃ / min, and depressurize at the same time Vacuumize, cool down and discharge, and make maleopimaric acid polyester polyol (MPP). At 70°C, add mass sum to 90 parts of diethylene glycol monoethyl ether aceta...

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Abstract

The invention discloses a preparation method of maleopimaric double-component waterborne polyurethane. The preparation method sequentially comprises the following steps: preparing a hydrophilic polyester intermediate; preparing maleopimaric polyester polyol; preparing a maleopimaric polyester polyol aqueous dispersion; and preparing the maleopimaric double-component waterborne polyurethane. According to the preparation method of the maleopimaric double-component waterborne polyurethane disclosed by the invention, a rosin tricyclophenanthrene framework is introduced into the double-component waterborne polyurethane in form of the polyester polyol component, so that the performances of the double-component waterborne polyurethane such as drying time, water resistance, hardness, glossiness and the like are remarkably improved; rosin is an important characteristic forest product resource in China and has the characteristics of being reproducible, green and environment-friendly, low in cost and the like. Rosin is introduced into the double-component waterborne polyurethane, so that not only is the comprehensive performance of a material improved, but also a novel path for development of rosin in direction of high additional value deep processing and utilization is further provided.

Description

technical field [0001] The invention relates to a method for preparing maleopimaric acid two-component water-based polyurethane, which belongs to the field of coatings. Background technique [0002] Two-component water-based polyurethane coatings not only inherit the advantages of low volatile organic compound VOC content of water-based coatings, but also have excellent mechanical properties, weather resistance and low-temperature film-forming properties of solvent-based two-component polyurethanes, showing broad development prospects , has become a research hotspot in the field of paint industry. The two-component waterborne polyurethane is mainly composed of -OH-containing polyol aqueous dispersion and -NCO-containing polyisocyanate curing agent. As the hydroxyl component of two-component waterborne polyurethane, polyol aqueous dispersion has an important influence on the performance of two-component waterborne polyurethane. Therefore, the research on polyol aqueous dispe...

Claims

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Application Information

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IPC IPC(8): C08G18/68C08G63/553
Inventor 宋湛谦司红燕商士斌王丹刘鹤沈明贵廖圣良宋杰
Owner INST OF CHEM IND OF FOREST PROD CHINESE ACAD OF FORESTRY
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