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Caprolactone modified hyperbranched polyester and preparation method and application thereof

A technology for modifying hyperbranched polyester and caprolactone, which is applied in the direction of polyester coatings and coatings, can solve the problems of incompatibility with solvents, achieve reduced viscosity, increased activity, and good coating performance Effect

Active Publication Date: 2013-02-06
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Also, the hyperbranched polyesters it describes provide only a limited increase in coating solids and do not have good solvent compatibility

Method used

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  • Caprolactone modified hyperbranched polyester and preparation method and application thereof
  • Caprolactone modified hyperbranched polyester and preparation method and application thereof
  • Caprolactone modified hyperbranched polyester and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0061] 1. Raw material preparation

[0062] Polyol: Ethylbutylpropylene glycol 16g (0.1mol); Dimethylolalkyl carboxylic acid: Dimethylol propionic acid 80.4g (0.6mol); Fatty acid: Lauric acid 40g (0.2mol); Caprolactone: 68.4g (0.6mol); acidic catalyst: 0.4g of p-toluenesulfonic acid; organotin catalyst: 0.05g of dibutyltin dilaurate; reflux solvent: 11g of xylene.

[0063] 2. Preparation

[0064] (a) When equipped with agitator, thermometer, water cooling condensate separator, N 2 Add 16g of ethyl butyl propylene glycol, 26.8g of dimethylol alkyl carboxylic acid (dimethylol propionic acid), 0.1g of acid catalyst p-toluenesulfonic acid and 2.5g of reflux solvent xylene into the inlet four-necked flask , at 140°C N 2 React under protection until no water distills out, then gradually rise to 180°C to react until the acid value is lower than 20mgKOH / g (according to GB / T 12008.5-89 to determine the polymer acid value); continue to add 53.6g of dimethylol alkyl carboxyl Acid, 0....

Embodiment 2

[0079] 1. Raw material preparation

[0080]Polyol: Neopentyl Glycol 10.4g (0.1mol); Dimethylolalkyl Carboxylic Acid: Dimethylolpropionic Acid 80.4g (0.6mol); Fatty Acid: Lauric Acid 40g (0.2mol); Caprolactone: 68.4g (0.6mol); acidic catalyst: concentrated sulfuric acid 0.7g; organotin catalyst: 0.05g dibutyltin dilaurate; reflux solvent: toluene 15g

[0081] 2. Preparation

[0082] (a) When equipped with agitator, thermometer, water cooling condensate separator, N 2 In the inlet four-necked flask, add 10.4g of neopentyl glycol, 26.8g of dimethylol alkyl carboxylic acid, 0.15g of acid catalyst concentrated sulfuric acid and 3g of toluene. 2 React under protection until no water distills off, then gradually rise to 180°C to react until the acid value is lower than 20mgKOH / g; continue to add 53.6g of dimethylolalkyl carboxylic acid, 0.3g of acid catalyst concentrated sulfuric acid and 6g of reflux solvent, at 140°CN 2 React under protection until no water distills off, then g...

Embodiment 3

[0091] 1. Raw material preparation

[0092] Polyol: YmerN120 (molecular weight 1000) 70g (0.07mol); Dimethylolalkyl carboxylic acid: dimethylolbutyric acid 62.16g (0.42mol); Fatty acid: oleic acid 56.4g (0.2mol); Caprolactone : 47.88g (0.42mol); acidic catalyst: 0.4g of hypophosphorous acid; organic tin catalyst: 0.035g of dibutyltin dilaurate; reflux solvent: 15g of xylene.

[0093] 2. Preparation

[0094] (a) When equipped with agitator, thermometer, water cooling condensate separator, N 2 Into the inlet four-necked flask, add 70g of polyol Ymer N120, 20.72g of dimethylol butyric acid, 0.1 acid catalyst hypophosphorous acid and 3g of xylene, at 140°C N 2 React under protection until no water distills out, then gradually rise to 180°C to react until the acid value is lower than 20mgKOH / g; continue to add 41.44g dimethylol butyric acid, 0.2g hypophosphorous acid and 6g reflux solvent xylene, at 140°C N 2 React under protection until no water distills out, and then graduall...

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Abstract

The invention discloses caprolactone modified hyperbranched polyester, and a preparation method and an application thereof. The preparation method includes mixing polyatomic alcohol with dihydroxytoluene alkyl carboxylic acid by mole part, adding acid catalysts and reflux solvents to react under N2 protection at 140-230 DEG C so as to obtain hyperbranched polyester; adding fatty acid into the hyperbranched polyester serving as the substrate, adding the acid catalysts and the reflux solvents to carry out reflux reaction under N2 protection at 140-240 DEG C until the acid value is lower than 15mgKOH / g so as to obtain the fatty acid modified hyperbranched polyester; and finally adding caprolactone and organic tin catalysts into the fatty acid modified hyperbranched polyester to react under N2 protection at 130-230 DEG C, and removing the organic solvents to obtain the caprolactone modified hyperbranched polyester. The caprolactone modified hyperbranched polyester has no defect of overhigh viscosity as the conventional hyperbranched resin, and good-performance coating films can be obtained after the caprolactone modified hyperbranched polyester is in crosslinking with the polyurethane curing agents. The preparation method can be used for preparing high-solid-content and solvent-free coatings.

Description

technical field [0001] The invention relates to a hyperbranched polyester, in particular to a caprolactone-modified hyperbranched polyester and a preparation method and application thereof; belonging to the field of organic polymer compounds. Background technique [0002] The highly branched molecular structure of hyperbranched polymers endows them with excellent properties, including: (1) Low viscosity: hyperbranched polymers have highly branched, compact three-dimensional spherical structures, and the molecular chains are not easy to entangle. Hyperbranched polymers have lower melt or solution viscosities than linear polymers. (2) High solubility: Compared with linear polymers of the same molecular weight, the solubility of hyperbranched polymers in solvents is increased, which can greatly reduce the amount of solvents used, reduce costs and reduce emissions; (3) Numerous active end groups Functional groups: hyperbranched polymers are prepared by stepwise reactions betwee...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G63/91C09D167/00
Inventor 瞿金清王勇朱延安
Owner SOUTH CHINA UNIV OF TECH
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