A solvent-free epoxy rust-inhibiting paint that can be painted with wet rust
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A solvent-free, rust-bearing technology, applied in the field of coatings, can solve problems such as affecting the performance of metal structures, affecting the decorative effect of coatings, affecting safety, etc. effect of time
Inactive Publication Date: 2018-05-15
GUANGZHOU RAILWAY GRP CORP
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Problems solved by technology
The final result, one is to affect the decorative effect of the coating and affect its appearance; the other is to affect the structural performance of the metal, which will seriously affect its safety
Method used
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Embodiment 1
[0040] Provided is a solvent-free epoxy rust-inhibiting paint that can be painted with wet rust, which is composed of two components, A and B. The weight of component A is 1.5 to 2.5 times that of component B.
[0041] In percent by weight, the content of component A consists of:
[0042]
[0043] In percent by weight, the content of component B consists of:
[0044] Curing agent 60~90;
[0045] Modifier 2~10;
[0046] Second reactive diluent 5-15.
[0047] Among them, the main film-forming resin is bisphenol F epoxy resin, such as DER354 or EPIKOTE862, which has low viscosity, good wettability, excellent chemical resistance and corrosion resistance.
[0048] The first active agent is a hyperbranched polyether-polyester resin terminated with phenolic hydroxyl and carboxyl groups, and the second active agent is a hyperbranched polyether-polyester resin terminated with phenolic hydroxyl and carboxyl groups.
[0049] The selection of the first and second reactive diluents ...
Embodiment 2
[0057] A solvent-free epoxy rust-inhibiting paint that can be painted with wet rust. Other features are the same as in Example 1, except that the weight of component A is 2.0 times that of component B. Practice has proved that this proportion of solvent-free epoxy rust-inhibiting paint that can be painted with wet rust has better performance and lower requirements for surface treatment of objects.
Embodiment 3
[0059] A kind of solvent-free epoxy rust coating that can be applied with wet band rust, other features are identical with embodiment 1 or 2, and difference is:
[0060] In terms of weight percentage, the content of component A consists of:
[0061]
[0062] In percent by weight, the content of component B consists of:
[0063] Curing agent 70~85;
[0064] Modifier 3~9;
[0065] The second reactive diluent 6-10.
[0066] Practice has proved that the solvent-free epoxy rust-inhibiting paint that can be painted with wet rust has excellent performance and better long-term protection performance for objects.
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Abstract
The invention relates to a solvent-free epoxy rust confining coating capable of coating in a wet and rust environment. The solvent-free epoxy rust confining coating consists of two components A and B; the weight of the component A is 1.5 to 2.5 times that of the component B; in percentage by weight, the component A is prepared from 50 to 90 percent of main film forming resin, 20 to 40 percent of first reactive diluent, 1 to 3 percent of wetting leveling resin and 0.2 to 1.0 percent of solvent-free defoaming agent; in percentage by weight, the component B is prepared from 60 to 90 percent of curing agent, 2 to 10 percent of modifier and 5 to 15 percent of second reactive diluent. The main film forming resin is bisphenol F-type epoxy resin, an active agent is hyperbranched polyether-polyester resin terminated by phenolic hydroxy and carboxyl, the curing agent is mannich amide, and the modifier is ketimine. The rust confining primer disclosed by the invention has a low requirement for surface processing, can be constructed on a wet surface, is high in stability of a rusted position, and is excellent in long-acting protection performance on an integral object.
Description
technical field [0001] The invention relates to the technical field of coatings, in particular to a solvent-free epoxy rust-inhibiting coating which can be coated with wet rust. Background technique [0002] According to the statistics of the National Anti-Corrosion Association in 2014, the direct loss caused by steel corrosion in China is about 30 billion each year, and the annual loss of corroded steel accounts for 3% of the annual steel production, which is an astonishing amount. [0003] At the same time, according to the statistics of the National Anti-Corrosion Association, after nearly 10 years of rapid development of the domestic construction industry, a large number of anti-corrosion projects have appeared corrosion to varying degrees within 2-5 years after completion. Rust or spot rust that occurs about 2 years after completion, if not treated, the rust will continue to grow, and the rate of rust expansion will increase. The final result, one is to affect the deco...
Claims
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Application Information
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