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Low-temperature quick-drying solvent-free epoxy coating for drinking water tank and preparation method thereof

An epoxy coating, solvent-free technology, applied in the field of coating manufacturing, can solve the problems of slow reaction speed, long hardening time, difficult to adapt to the requirements of coating process, etc., and achieve the effect of fast drying speed

Inactive Publication Date: 2011-04-13
COSCO KANSAI PAINT & CHEM TIANJIN +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In addition, when the general solvent-free epoxy coating is at a low temperature of about 10°C, the reaction speed is slow and the hardening time is long, so it is difficult to adapt to the actual coating process requirements

Method used

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  • Low-temperature quick-drying solvent-free epoxy coating for drinking water tank and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] 1) Preparation of epoxy components: drop into 25 parts by weight of small molecule bisphenol F epoxy resin (GY282), 9 parts by weight of reactive diluent (HELOXY modifier 65), 0.5 parts by weight of dispersant ( SOLSPERS37500), 1.0 parts by weight of silane coupling agent (KBM-403), 0.5 parts by weight of defoamer (AC-300), start to stir evenly, and add the following components respectively under the condition of stirring: 4 parts by weight of thixotropic agent ( VA-750B), 7 parts by weight of titanium dioxide (R-930), 53 parts by weight of low oil absorption talcum powder, disperse at high speed for 30 minutes, then grind to standard fineness with a sand mill or three-roll mill, filter and pack to become a coating A component.

[0046] 2) Put 95 parts by weight of commercially available modified aromatic amine curing agent Aradur 847 and 5 parts by weight of K-54 into the dispersing tank and stir evenly, then pack them into small barrels according to the matching and p...

Embodiment 2

[0056]3) Preparation of epoxy components: drop into 22 parts by weight of small molecule bisphenol F epoxy resin (GY282), 11 parts by weight of reactive diluent (HELOXY modifier 65), 0.6 parts by weight of dispersant ( SOLSPERS37500), 0.9 parts by weight of silane coupling agent (KBM-403), 0.4 parts by weight of defoamer (AC-300), start to stir evenly, and add the following components respectively under the condition of stirring: 5 parts by weight of thixotropic agent ( VA-750B), 7.5 parts by weight of titanium dioxide (R-930), 51.6 parts by weight of low oil absorption talcum powder, disperse at high speed for 30 minutes, then grind to standard fineness with a sand mill or a three-roll mill, filter and pack to become a coating A component.

[0057] 4) Put 95 parts by weight of commercially available modified aromatic amine curing agent Aradur 847 and 5 parts by weight of K-54 into the dispersing tank and stir evenly, then pack them into small barrels according to the matching...

Embodiment 3

[0060] 5) Preparation of epoxy components: drop into 20 parts by weight of small molecule bisphenol F epoxy resin (GY282), 14 parts by weight of reactive diluent (HELOXY modifier 65), 0.7 parts by weight of dispersant ( SOLSPERS37500), 1.1 parts by weight of silane coupling agent (KBM-403), 0.2 parts by weight of defoamer (AC-300), start to stir evenly, and add the following components respectively under the condition of stirring: 6 parts by weight of thixotropic agent ( VA-750B), 8 parts by weight of titanium dioxide (R-930), 50 parts by weight of low oil absorption talcum powder, disperse at high speed for 30 minutes, then grind to standard fineness with a sand mill or three-roller mill, filter and pack to become a coating A component.

[0061] 6) Put 95 parts by weight of commercially available modified aromatic amine curing agent Aradur 847 and 5 parts by weight of K-54 into the dispersing tank and stir evenly, then pack them into small barrels according to the matching an...

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Abstract

The invention relates to a low-temperature quick-drying solvent-free epoxy coating for a drinking water tank and a preparation method thereof, wherein epoxy resin, a reactive diluent, a dispersant, a silane coupling agent, a thixotropic additive, titanium dioxide, talcum powder, a defoamer, a modified aromatic amine curing agent and a catalyst are used for constituting an A component and a B component; when in use, the A component and the B component are mixed according to the mixing weight ratio of 7.5 / 1-8.5 / 1, the mixing viscosity under the low-temperature condition of 10-15 DEG C is 3000-5000mPa.s, the operable time is 1-2 hours, the semi-hardening time is 6-8 hours, and the hardening time is 20-24 hours. The epoxy coating has excellent coating constructability and drying property of acoating film. The epoxy coating is solvent-free and non-toxic, has low viscosity under the low-temperature condition of 10 DEG C, and ensures normal construction can be carried out without taking heating and thermal insulation measures; simultaneously, the drying speed of the coating film is fast, and the requirement of low-temperature construction process in winter can be completely met. The coating is particularly applicable to drinking water tanks of naval ships, as well as coating protection of the inner walls of large storage tanks in the food industry under the low-temperature condition.

Description

technical field [0001] The invention relates to paint manufacture in the field of chemical industry, and relates to a manufacturing technology of low-temperature, quick-drying solvent-free pure epoxy paint for clean water tanks and drinking water tanks of ships. Background technique [0002] At present, the coatings used in the drinking water tanks of ships are basically pure epoxy coatings, and their varieties include solvent-based epoxy coatings, high-solid epoxy coatings, and solvent-free epoxy coatings. Due to the narrowness of the drinking water compartment of the ship and the difficulty of air circulation, there are higher requirements for the volatile content of organic solvents and toxicity limits of coatings. High-solid coatings should completely replace the solvent-based coatings currently used, and gradually develop to solvent-free coatings. direction development. [0003] Solvent-free epoxy coatings have a high viscosity, especially during low-temperature constr...

Claims

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Application Information

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IPC IPC(8): C09D163/00C09D163/02C09D7/12
Inventor 孙希鹏杜景怡王新征
Owner COSCO KANSAI PAINT & CHEM TIANJIN
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