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Room temperature self-crosslinking water-based epoxy ester and preparation method thereof

A self-crosslinking, epoxy ester technology, used 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 improve corrosion resistance and excellent corrosion resistance. Effect

Active Publication Date: 2017-09-29
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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  • Room temperature self-crosslinking water-based epoxy ester and preparation method thereof
  • Room temperature self-crosslinking water-based epoxy ester and preparation method thereof
  • 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] ...

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 prepared, the product effect is tested to meet the requirements, and it is applied to the water-based industrial anti-corrosion coating. The prepared water-based industrial coating has good water resistance, corrosion resistance and adhesion to the substrate.

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 prepared, the product effect is tested to meet the requirements, and it is applied to the water-based industrial anti-corrosion coating. The prepared water-based industrial coating has good water resistance, corrosion resistance and adhesion to the substrate.

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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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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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