Non-ionic active epoxy emulsifier preparation method and waterborne epoxy resin preparation method

A water-based epoxy resin and epoxy emulsifier technology, applied in the chemical industry, can solve the problems of reducing the water absorption rate of the polymer film, poor hydrolysis resistance, poor water resistance and solvent resistance of the polymer film, etc., to achieve stable structure and performance. Stable, mild reaction conditions

Inactive Publication Date: 2012-08-15
KING STRONG MATERIAL ENG LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The document "Chin.J.Polym.Sci." [2007,25(2):137-143] used PEG10000 as emulsifier to prepare a stable epoxy emulsion by phase inversion method, but due to the influence of emulsifier molecular migration, polymerization The water resistance and solvent resistance of the film are poor
The literature "Applied Chemical Industry" [2006, 35(10): 785-788] and "Thermosetting Resin" [2005, 20(3): 20-22] combined chemical modification and phase inversion method to synthesize non-ionic The end methoxy polyethylene glycol-maleic anhydride-E44 and the ionic active emulsifier and the epoxy resin aqueous emulsion were prepared by means of phase inversion technology, and the emulsifier was chemically bonded to the polymer chain in the cured polymer Combined, to a certain extent, the water absorption rate of the polymer film is reduced, but the ester bond in the emulsifier still has the defect of poor hydrolysis stability

Method used

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  • Non-ionic active epoxy emulsifier preparation method and waterborne epoxy resin preparation method
  • Non-ionic active epoxy emulsifier preparation method and waterborne epoxy resin preparation method
  • Non-ionic active epoxy emulsifier preparation method and waterborne epoxy resin preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] (1) Add 0.1mol α-methoxy-ω-alkyl polyetheramine (MPE1) and 0.1mol propylene oxide (PO) to the reaction kettle, and stir the reaction for 12 hours at room temperature to obtain propylene oxide-capped α-methoxy-ω-N-isopropanol alkyl polyether (referred to as PO-MPE1). The molecular formula of the adduct is (2):

[0023]

[0024] (2) Then add 0.1mol novolac epoxy resin and appropriate amount of tetrahydrofuran, stir to form a homogeneous solution, and react at 50°C for 6 hours. After the reaction, the solvent is distilled off under reduced pressure to obtain a nonionic active emulsifier, referred to as MPEF1. The molecular formula of the adduct is (3):

[0025]

[0026] (3) The emulsifier can be directly added with deionized water to prepare an epoxy resin aqueous emulsion (abbreviated as MPEF1 aqueous emulsion) with a solid content of 50%.

Embodiment 2

[0028] (1) Add 1mol α-methoxy-ω-alkyl polyetheramine (MPE2) and 1mol propylene oxide (PO) into the reactor, and stir for 18 hours at room temperature to obtain propylene oxide-capped α- Methoxy-ω-N-isopropanol alkyl polyether (referred to as PO-MPE2). The molecular formula of the adduct is (4):

[0029]

[0030] (2) Then add 1mol novolak epoxy resin and appropriate amount of tetrahydrofuran, stir to form a homogeneous solution, and react at 40°C for 16 hours. After the reaction, the solvent is distilled off under reduced pressure to obtain a nonionic active emulsifier, MPEF2 for short. The molecular formula of the adduct is (5):

[0031]

[0032] (3) The emulsifier and epoxy resin E44 are added in a dispersing kettle in a molar ratio of 1: 10 and mixed evenly, and then deionized water is added dropwise to prepare a 60% epoxy resin aqueous emulsion (abbreviated as MPEF2 / E44 water emulsion).

Embodiment 3

[0034] (1) Add 1mol α-methoxy-ω-alkyl polyetheramine (MPE3) and 1mol propylene oxide (PO) into the reaction kettle, and stir the reaction for 24 hours at room temperature to obtain propylene oxide-terminated α- Methoxy-ω-N-isopropanol alkyl polyether (referred to as PO-MPE3). The molecular formula of this adduct is (6):

[0035]

[0036] (2) Then add 1mol novolac epoxy resin and appropriate amount of acetone, stir to form a homogeneous solution, and react at 30°C for 12 hours. After the reaction, the solvent acetone is distilled off under reduced pressure to obtain a nonionic active emulsifier, referred to as MPEF3. The molecular formula of this adduct is (7):

[0037]

[0038] (3) The emulsifier and epoxy resin F44 are added into the dispersion kettle in a molar ratio of 1: 30 and mixed evenly, and then deionized water is added dropwise to prepare a 60% epoxy resin aqueous emulsion (abbreviated as MPEF3 / F44 water emulsion).

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Abstract

The invention discloses a non-ionic active epoxy emulsifier preparation method and a waterborne epoxy resin preparation method. The non-ionic active epoxy emulsifier preparation method includes: firstly, using a single epoxy group compound to terminate alpha-methoxy-omega-alkyl polyether amine; and then adding novolac epoxy resin and a good amount of solvent in equimolar ratio, stirring the novolac epoxy resin and the solvent to homogeneous-phase solution prior to temperature rise reaction, and removing the solvent by means of reduced pressure distillation after reaction, so that non-ionic active epoxy emulsifier is prepared. The emulsifier and EP (epoxy resin) are added into a dispersing kettle according to different molar ratios to be evenly mixed, and deionized water is dropwise added to prepare epoxy resin aqueous emulsion with the solid content of 40-60% by means of phase inversion. The emulsion is high in storage stability, non-toxic and high in packing ratio of packing and can be cured at the room temperature, and a cured product has the advantages of high adhesive force and flexibility and is high in water proofing and solvent resistance.

Description

technical field [0001] The invention belongs to the technical field of chemical industry, and in particular relates to a nonionic active epoxy emulsifier and a preparation method thereof for water-based epoxy resin. Background technique [0002] Solvent-based epoxy resins bring harm to the ecological environment because they contain a large amount of organic solvents, while green and environmentally friendly water-based epoxy resins are increasingly favored by people. However, epoxy resin itself is insoluble in water and cannot be directly emulsified by adding water. It must introduce hydrophilic groups into its molecular chain or add hydrophilic and lipophilic components to the system. At present, there are chemical modification method and phase inversion method for the preparation of epoxy resin water-based dispersion system. The chemical modification method mainly introduces carboxylic acid into the epoxy resin molecular chain through functional monomer chain extension an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G59/62C08G65/00C08J3/03C08L63/00C07D303/28C07D301/00
Inventor 王刚赵立英
Owner KING STRONG MATERIAL ENG LTD
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