Solvent-free non-toxic coating for large-scale container internal wall

A non-toxic coating and large-scale container technology, applied in the field of coating manufacturing, can solve the problems of unusable inner walls of containers and pipes, expensive PTFE coatings, etc., and achieve the effect of energy saving

Active Publication Date: 2008-07-02
MARINE CHEM RES INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Most of the anti-corrosion coatings for the inner walls of containers are based on asphalt-paraffin wax, which cannot be used for the inner walls of containers and pipes in the food processing and brewing industry due to its toxicity.
[0003] PTFE coating is expensive, and PTFE will crack at 280°C to produce highly volatile toxic fluoride, and it cannot be used in places where it contacts acidic food systems
[0004] Common solvent-based epoxy resin coating systems are also restricted for use in the food container industry due to the presence of solvents

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] The preparation of embodiment 1 modified epoxy resin

[0039] Raw material parts by weight

[0040] Epoxy resin E51 54

[0041] Polysulfide rubber PS1000 40

[0042] n-Butyl glycidyl ether 6

[0043] Feed into the reaction kettle according to the above ratio, raise the temperature to 90°C, and add 0.03 part of catalyst 2,4,6-tris(dimethylaminomethyl)phenol while stirring. React for 3 hours while stirring under heat preservation at 90° C. to obtain a yellowish brown transparent liquid polysulfide rubber modified epoxy resin.

Embodiment 2

[0044] Embodiment 2 Preparation of solvent-free and non-toxic paint

[0045] Take by weighing 80 parts by weight of E51 epoxy resin, adopt 20 parts by weight of modified epoxy resin of embodiment 1, drop into the stainless steel tank and stir with a high-speed mixer, add defoamer BYK-055 and DEH6800 altogether 1.02 parts by weight, wetting 0.45 parts by weight of dispersant BYK-P104S, 0.03 parts by weight of leveling agent BYK-322, stir evenly with resin, add 1.3 parts by weight of titanium dioxide, 14.5 parts by weight of precipitated barium sulfate, thixotropic agent (organic bentonite) B-27 # 1.4 parts by weight are further stirred evenly, and then ground to a standard fineness with a sand mill or a three-roll mill, filtered and loaded into a barrel to become component A of the coating.

[0046] Use commercially available modified aromatic amine curing agent K4170 parts by weight, defoamer BYK-055 and DEH6800 total 1.0 parts by weight, wetting and dispersing agent (BYK-P104...

Embodiment 3

[0055]Embodiment 3 The preparation of modified epoxy resin and the preparation of coating

[0056] Raw material parts by weight

[0057] Epoxy resin R140 50

[0058] Polysulfide rubber PS1000 42

[0059] n-Butyl glycidyl ether 8

[0060] The preparation process is the same as in Example 1, and a yellow-brown transparent liquid polysulfide rubber-modified epoxy resin is obtained.

[0061] When preparing the paint, 65 parts by weight of epoxy resin DER331 was used together with 35 parts by weight of the modified epoxy resin prepared in Example 3, and the rest were the same as in Example 2. Coatings with similar properties and effects are obtained.

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Abstract

The invention discloses a solvent-free nontoxic coating applied to the inner wall of large containers, consisting of epoxy resin, modified epoxy resin, modified aromatic amine curing agent, pigment, filler, thixotropic agent and addition agent. The modified epoxy resin is obtained by the reaction between polysulfide and bisphenol A epoxy resin. The coating is applied to large containers of various food and brewing industries such as marine ballast tanks, drinking tanks, water tanks, beer tanks, power plant sewage tanks, liquor, soy sauce, yeast food, edible oil, etc., and the coating protection of the inner walls of petrol and other chemical product storage tanks and grooves, etc.

Description

technical field [0001] The invention relates to paint manufacturing in the chemical industry field, and relates to a solvent-free and non-toxic paint manufacturing technology and construction technology for the inner wall of a large container. Background technique [0002] Most of the anti-corrosion coatings for the inner wall of the container are based on asphalt-paraffin, which cannot be used for the inner wall of the container and pipeline in the food processing and brewing industry because of its toxicity. [0003] Polytetrafluoroethylene coating is expensive, and polytetrafluoroethylene will crack under the condition of 280 ℃ to produce highly volatile toxic fluoride, and it cannot be used in places where it contacts acidic food systems. [0004] Common solvent-based epoxy resin coating systems are also restricted for use in the food container industry due to the presence of solvents. Contents of the invention [0005] The present invention aims to overcome the vario...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D163/00B65D90/06
Inventor 张善贵郭常青卢伟陆璐孙春龙张世珍王红
Owner MARINE CHEM RES INST CO LTD
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