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A kind of room temperature self-crosslinking water-based epoxy ester and preparation method thereof

A self-crosslinking and epoxy ester technology, applied in epoxy resin coatings, coatings, anti-corrosion coatings, etc., can solve the problems of poor corrosion resistance, poor water resistance, poor weather resistance, etc., to achieve improved corrosion resistance and excellent corrosion resistance Effect

Active Publication Date: 2019-01-22
绍兴长木新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing room temperature self-crosslinking waterborne epoxy ester has poor water resistance and poor weather resistance
The room temperature self-crosslinking waterborne epoxy ester partially modified by acrylic acid has improved drying speed, but its corrosion resistance is relatively poor

Method used

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  • A kind of room temperature self-crosslinking water-based epoxy ester and preparation method thereof
  • A kind of room temperature self-crosslinking water-based epoxy ester and preparation method thereof
  • A kind of room temperature self-crosslinking water-based epoxy ester and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0024] A room temperature self-crosslinking water-based epoxy ester, including linoleic acid, epoxy resin E-20, epoxy resin E-03, benzoic acid, phthalic anhydride, antioxidant, polyaziridine crosslinking agent and ethylene glycol Alcohol butyl ether; In parts by mass, the linoleic acid: 29 parts; Epoxy resin E-20: 14 parts; Epoxy resin E-03: 10 parts; Benzoic acid: 6 parts; Phthalic anhydride: 3 parts; Antioxidant: 0.2 parts; polyaziridine crosslinking agent: 1 part; ethylene glycol butyl ether 21.5 parts.

[0025] Wherein, the epoxy resin E-20 is bisphenol A epoxy resin (E-20).

[0026] The epoxy resin E-03 is bisphenol A type epoxy resin (E-03).

[0027] The polyaziridine crosslinking agent is a trifunctional aziridine crosslinking agent.

[0028] Further, the trifunctional aziridine crosslinking agent is trimethylolpropane-tris[3-(2-methylaziridinyl)]propionate, trimethylolpropane-tri(3- aziridinyl) propionate or pentaerythritol-tris(3-aziridinyl) propionate.

[0029] T...

Embodiment approach 2

[0056] A room temperature self-crosslinking water-based epoxy ester, in parts by mass, the linoleic acid: 32 parts; epoxy resin E-20: 16 parts; epoxy resin E-03: 12.5 parts; benzoic acid: 7.5 parts; Phthalic anhydride: 3.8 parts; Antioxidant: 0.2 parts; Polyaziridine crosslinking agent: 2 parts; 25 parts of ethylene glycol butyl ether. After adopting the above proportioning, the heat preservation time of step 4 of the preparation method is set to 4 hours. After the product is produced, the effect of the product is tested to meet the requirements, and it is applied to water-based industrial anti-corrosion coatings. The prepared water-based industrial coatings have good water resistance, corrosion resistance and adhesion to substrates.

Embodiment approach 3

[0058] A room temperature self-crosslinking type water-based epoxy ester, in parts by mass, the linoleic acid: 26 parts; epoxy resin E-20: 12 parts; epoxy resin E-03: 8.5 parts; benzoic acid: 4.8 parts; Phthalic anhydride: 2.2 parts; Antioxidant: 0.2 parts; Polyaziridine crosslinking agent: 0.5 parts; 18 parts of ethylene glycol butyl ether. After adopting the above proportioning, the heat preservation time of step 4 of the preparation method is set to 3 hours. After the product is produced, the effect of the product is tested to meet the requirements, and it is applied to water-based industrial anti-corrosion coatings. The prepared water-based industrial coatings have good water resistance, corrosion resistance and adhesion to substrates.

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Abstract

The invention relates to the technical field of water-based paint, and particularly relates to a room temperature self-crosslinking water-based epoxy ester and a preparation method thereof. The preparation method comprises the following steps: putting 26-32 parts by mass of linoleic acid, 12-16 parts by mass of epoxy resin E-20, 8.5-12.5 parts by mass of epoxy resin E-03, 4.8-7.5 parts by mass of benzoic acid, 2.2-3.8 parts by mass of phthalic anhydride and 0.2 part by mass of antioxidant into a reaction kettle, performing heating to 120 DEG C, and starting stirring; performing heating to 160 DEG C, and keeping the temperature for 1 hour; performing heating to 180 DEG C, and keeping the temperature for 1 hour; performing final heating to 240 DEG C, and keeping the temperature for 3-4 hours; performing cooling to 160 DEG C, adding 0.5-2 parts by mass of polyaziridine, and keeping the temperature for 1 hour; and performing further cooling to 120 DEG C, adding 18-25 parts by mass of ethylene glycol butyl ether, and performing uniform stirring to obtain the product. Through a crosslinking reaction of the polyaziridine and carboxyl groups in the epoxy resin, the room temperature self-crosslinking water-based modified epoxy ester resin having water resistance, corrosion resistance and high substrate adhesion force is synthesized.

Description

technical field [0001] The invention relates to the technical field of water-based coatings, in particular to a room-temperature self-crosslinking water-based epoxy ester and a preparation method thereof. Background technique [0002] Water-based resins commonly used in water-based coatings include: water-based epoxy resin, water-based polyurethane, water-based acrylic resin, water-based alkyd resin, etc. Waterborne epoxy resin refers to a stable dispersion system prepared by dispersing epoxy resin in the form of particles or droplets in a dispersion medium with water as the continuous phase. Since the epoxy resin is a thermosetting resin with a linear structure, a water-based epoxy curing agent must be added before construction, and a chemical crosslinking reaction occurs at room temperature. It forms an insoluble and infusible space network structure, showing excellent performance. [0003] In order to improve the paint film properties of water-based paints so that they ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G59/50C09D163/00C09D5/08
CPCC08G59/5066C09D5/08C09D163/00
Inventor 崔文国梁震李加青
Owner 绍兴长木新材料科技有限公司
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