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Cardanol phenol-based polyol and preparation method thereof

A cardanol-based, polyurethane technology, applied in the preparation of thioether, organic chemistry, etc., can solve the problems of poor abrasion resistance, chemical resistance, and lack of hardness of the coating, and achieve excellent flexibility, rich sources, and simple post-processing Effect

Active Publication Date: 2016-04-06
JIANGXI SCI & TECH NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Vegetable oil-based polyols have been widely used in the preparation of polyurethane resins. However, since most vegetable oils are triglyceride structures of fatty acids, the polyurethane resins prepared from polyols lack hardness and are used as coatings. Resin leads to poor wear resistance and chemical resistance of the coating

Method used

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  • Cardanol phenol-based polyol and preparation method thereof
  • Cardanol phenol-based polyol and preparation method thereof
  • Cardanol phenol-based polyol and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] In a 100ml round bottom flask, add 20g of cardanol, 23.5g of 2-mercaptoethanol, 0.87g of 2-hydroxy-2-methyl-1-phenyl-1-propanone and 50ml of dichloromethane, and irradiate at room temperature and ultraviolet light The reaction was carried out for 10 hours, washed with water for 5-6 times and then washed with anhydrous MgSO 4 Drying and desolventization of the cardanol-based polyol, the number of hydroxyl groups measured by NMR is 2.

Embodiment 2

[0026] In a 100ml round bottom flask, add 20g of cardanol, 23.5g of 2-mercaptoethanol, 0.87g of 2-hydroxy-2-methyl-1-phenyl-1-propanone and 50ml of dichloromethane, and irradiate at room temperature and ultraviolet light The reaction was carried out for 20 hours, washed with water for 5-6 times and then washed with anhydrous MgSO 4 Drying, desolventizing cardanol-based polyol, the number of hydroxyl groups measured by NMR is 2.5.

Embodiment 3

[0028] In a 100ml round bottom flask, add 20g of cardanol, 23.5g of 2-mercaptoethanol, 0.87g of 2-hydroxy-2-methyl-1-phenyl-1-propanone and 50ml of dichloromethane, and irradiate at room temperature and ultraviolet light The reaction was carried out for 45 hours, washed with water for 5-6 times and then washed with anhydrous MgSO 4 Drying, solvent removal to obtain cardanol-based polyols, the number of hydroxyl groups measured by NMR is 3.3.

[0029] cardanol 1 HNMR diagram see figure 1 , of cardanol polyols (3.3 hydroxyl groups) 1 HNMR diagram see figure 2 .

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Abstract

The invention discloses a preparation method of two cardanol-base polyalcohols and polyurethanes thereof, which comprises the following steps: (1) directly carrying out sulfhydryl-alkene addition reaction on cardanol side chain unsaturated double bond and sulfhydryl monoalcohol under the irradiation of ultraviolet light to prepare the side chain cardanol-base polyalcohol with controllable hydroxyl number; (2) reacting hendecene acyl chloride and phenolic hydroxyl group of cardanol to prepare 10-undecylenic acid modified cardanol, reacting with sulfhydryl monoalcohol to prepare 10-undecylenic acid modified cardanol-base polyalcohol with controllable hydroxyl number; and (3) reacting the cardanol-base polyalcohol and 10-undecylenic acid modified cardanol-base polyalcohol with diisocyanate to prepare the cardanol-base polyurethanes. The method has the advantages of low cost, no environmental pollution and the like, and is renewable and biodegradable; and the generated polyurethane resin can be used as a resin for paints and adhesives.

Description

technical field [0001] The invention relates to a preparation method of bio-based polyurethane, in particular to a preparation method of two cardanol-based polyols and polyurethane. Background technique [0002] Cardanol is an abundant and inexpensive renewable non-edible vegetable oil resource. Its molecular structure contains phenolic hydroxyl groups and 15-carbon side chains with different degrees of unsaturation. This unique molecular structure is conducive to its chemical modification to prepare different functional chemicals and polymer materials, among which cardanol-based surfactants and anti-corrosion coatings containing cardanol have been studied more. The reaction sites of chemical modification are mainly concentrated on the phenolic hydroxyl group, and the modification of unsaturated double bonds on its side chain is less, and there are only a few studies on epoxidation of unsaturated side chains. Vegetable oil-based polyols have been widely used in the preparat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G18/67C08G18/32C07C319/16C07C323/16
CPCC07C319/18C08G18/677C07C323/16
Inventor 付长清申亮刘建成
Owner JIANGXI SCI & TECH NORMAL UNIV
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