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Reaction viscosity adjusting composition suitable for two-component waterborne epoxy system as well as preparation method and application of reaction viscosity adjusting composition

A water-based epoxy and viscosity adjustment technology, applied in the direction of epoxy resin coatings, coatings, anti-corrosion coatings, etc., can solve the problem of reducing the physical and mechanical properties and chemical resistance of the paint film, not having reactivity, and unable to participate in two-component Problems such as cross-linking reaction of water-based epoxy system to achieve excellent physical and mechanical properties and chemical resistance, improve physical and mechanical properties and chemical resistance, and high thickening efficiency

Active Publication Date: 2021-12-21
WANHUA CHEM GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, HEUR on the market is not reactive in water-based epoxy systems and cannot participate in the crosslinking reaction of two-component water-based epoxy systems. It exists in a "free" state in the paint film, which will reduce the paint film to a certain extent. The physical and mechanical properties and chemical resistance of the membrane, so in the heavy-duty anti-corrosion field with harsh conditions, the HEUR currently on the market has certain disadvantages

Method used

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  • Reaction viscosity adjusting composition suitable for two-component waterborne epoxy system as well as preparation method and application of reaction viscosity adjusting composition
  • Reaction viscosity adjusting composition suitable for two-component waterborne epoxy system as well as preparation method and application of reaction viscosity adjusting composition
  • Reaction viscosity adjusting composition suitable for two-component waterborne epoxy system as well as preparation method and application of reaction viscosity adjusting composition

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] (1) Under the protection of nitrogen, take 73.16g of ethylene glycol diglycidyl ether (0.42mol) and add it to 250ml three-mouth burner, heat it to 55°C, and slowly add 42.06g of diethanolamine (0.4mol) to ethylene glycol In the diglycidyl ether, the dropping time is controlled at about 1 hour, and after the dropping is completed, the insulation reaction is carried out for 2 hours to obtain a monoepoxide intermediate product containing 2 primary hydroxyl groups;

[0048] (2) Under the protection of nitrogen, take 120g of PEG-6000 (0.02mol), 2.88g of the intermediate product of step (1) (calculated as diethanolamine is 0.01mol) into a 1L four-necked flask and stir evenly, heat to 75°C, and 10.49g of HMDI (0.04mol) and 0.26g of BiCAT8108 were added to the flask and incubated for 2h.

[0049] (3) After the reaction in step (2) is finished, take 4.85g Guerbet alcohol hexadecanol (0.02mol) and add it into the flask to continue the insulation reaction for 2h, then, use 138.22g...

Embodiment 2

[0051] (1) Under the protection of nitrogen, take 100.00g of epoxy resin E-44 (0.22mol) and add it to 250ml three-mouth burner, heat it to 75°C, and slowly add 21.03g of diethanolamine (0.2mol) into E-44 , the dropping time is controlled at about 1h, and after the dropping is completed, the insulation reaction is carried out for 3h to obtain a monoepoxy intermediate product containing 2 primary hydroxyl groups;

[0052] (2) Under the protection of nitrogen, take 120g of PEG-8000 (0.015mol), 9.08g of the intermediate product of step (1) (calculated as diethanolamine as 0.015mol) into a 1L four-necked flask and stir evenly, heat to 85°C, and 10.00g of IPDI (0.045mol) and 0.26g of BiCAT8108 were added to the flask and incubated for 2h.

[0053] (3) After the reaction in step (2) is finished, take 5.59g Guerbet alcohol twelve (0.03mol) and add to the flask to continue the insulation reaction for 2h, then, use 144.67g diethylene glycol butyl ether and 434.01g deionized water The h...

Embodiment 3

[0055] (1) Under the protection of nitrogen, take 101.13g of butanediol glycidyl ether (0.50mol) and add it to 250ml three-port burnt product, heat it to 75°C, and slowly add 53.28g of diisopropanolamine (0.40mol) to the butane In the glycol glycidyl ether, the dropping time is controlled at about 1h, and after the dropping is completed, the reaction is incubated for 3h to obtain a monoepoxide intermediate product containing 2 primary hydroxyl groups;

[0056] (2) Under the protection of nitrogen, take 120g of PEG-6000 (0.02mol), 1.93g of the intermediate product of step (1) (calculated as diethanolamine as 0.005mol) into a 1L four-necked flask and stir evenly, heat to 85°C, and 7.87g of HMDI (0.03mol) and 0.26g of BiCAT8108 were added to the flask and incubated for 2h.

[0057] (3) After the reaction in step (2) finishes, get 2.43g n-hexadecanol (0.01mol) and add into the flask to continue the insulation reaction for 2h, then, use 132.23g diethylene glycol butyl ether and 396...

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Abstract

The invention discloses a reactive viscosity adjusting composition suitable for a two-component waterborne epoxy system and a preparation method of the reactive viscosity adjusting composition. The viscosity adjusting composition is prepared from the following raw materials: a secondary amine compound containing double primary hydroxyl groups, a diepoxy compound, polyether polyol, diisocyanate, hydrophobic long-chain fatty alcohol, a catalyst, a stabilizer, and an optional alcohol ether solvent and / or water. The viscosity adjusting composition is mainly used for a two-component waterborne epoxy system, not only has an efficient viscosity adjusting effect, but also can be used for improving the physical and mechanical properties and chemical reagent resistance of a paint film as the molecular structure contains an active epoxy group and can participate in a crosslinking curing reaction of the paint film, so that the viscosity adjusting composition has a wide industrial application prospect.

Description

technical field [0001] The present invention relates to a special rheological additive for a two-component water-based epoxy system and a preparation method thereof, in particular to a reactive viscosity-adjusting composition suitable for a two-component water-based epoxy system and a preparation method thereof. Participate in the cross-linking and curing of two-component water-based epoxy resin. Background technique: [0002] Epoxy resin is widely used in the fields of electronics, machinery, construction, aviation and transportation because of its excellent mechanical properties, corrosion resistance, and very good metal adhesion properties. It is currently one of the most widely used resins in anti-corrosion coatings. Most epoxy resins are only soluble in organic solvents such as aromatic hydrocarbons and ketones, not water. With the increasingly serious environmental problems, countries have enacted strict laws and regulations to limit the emission of VOCs. Traditional ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/48C08G18/58C09D5/08C09D7/43C09D163/00C09D175/08
CPCC08G18/4045C08G18/4833C08G18/58C09D7/43C09D5/08C09D163/00C08L75/08
Inventor 沈如宝纪学顺秦佃斌冯聪聪冯秉哲朱传坤
Owner WANHUA CHEM GRP CO LTD
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