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Uses of polybenzoxazine thermosetting resins

A polybenzoxazine and benzoxazine technology, applied in the direction of anti-corrosion coatings, etc., can solve the problem of difficult to form high-solid thick film coatings, seldom use chemical medium for anti-corrosion, water resistance, adhesion and cathodic disbonding resistance. Sexual problems, etc.

Active Publication Date: 2016-08-03
EAST CHINA UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, its coating contains a small amount of free isocyanate group (-NCO), which is easy to react with moisture and moisture in the atmosphere and has an impact on human health. Therefore, it is strictly limited in terms of storage, construction performance and environmental protection, because its macromolecules There are a large number of intermolecular hydrogen bonds, and there are disadvantages such as poor water resistance, adhesion, and cathodic disbondment resistance, and the price is also higher than that of epoxy resin (L.H.Yang, F.C. LiuandE.H.Han, ProgressinOrganicCoatings, 53, 2005, 91- 98)
[0006] Chlorine-containing vinyl coatings are generally difficult to form high-solid thick-film coatings. Although most varieties have good water resistance, acid resistance, and alkali resistance, they are rarely used inside equipment due to their thinner coatings and poor permeability resistance. In the field of anti-corrosion of chemical media, and the temperature resistance and solvent resistance are poor

Method used

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  • Uses of polybenzoxazine thermosetting resins
  • Uses of polybenzoxazine thermosetting resins
  • Uses of polybenzoxazine thermosetting resins

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0056] With 3-(3-triethoxysilane) n-propyl-6-(trifluoromethyl)-3,4-dihydro-2H-1,3-benzoxazine (TFP-550) (formula I The compound shown in -1) is the precursor, Q235B carbon steel is the substrate, xylene / n-butanol is the solvent, the volume ratio is 7:3, the dip coating method is used, the concentration of the dip coating solution is 200mg / ml, dip coating The pulling rate was 350mm / min, the solvent was removed at 120°C under a vacuum of -0.1MPa for 30min, and the coating was cured at 200°C for 2h. The properties are shown in Table 1.

[0057]

[0058] Table 1

[0059]

Embodiment 2

[0061] The monomer in Example 1 is replaced by 6-methyl-3-(4-(trifluoromethyl)phenyl)-3,4-dihydro-2H-1,3-benzoxazine (MP- TFA) (compound shown in formula I-2), its coating preparation method is identical with embodiment 1, and coating performance is shown in Table 2:

[0062]

[0063] Table 2

[0064]

Embodiment 3

[0066] The monomer in Example 1 is replaced by 3-(1-naphthyl)-3,4-dihydro-2H-1,3-benzoxazine (P-N) (compound shown in formula I-3), which Coating preparation method is identical with embodiment 1, and coating performance is shown in Table 3:

[0067]

[0068] table 3

[0069]

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Abstract

The invention relates to an application of polybenzoxazine thermosetting resin, and relates to the application thereof in preparing a metal anticorrosive coating. When polybenzoxazine thermosetting resin (including homopolymer and copolymer) is adopted as the metal anticorrosive coating, advantages such as low water absorption, high glass transition temperature, good thermal stability, high adhesion force, good toughness and hydrophobicity, and good corrosion resistance are provided.

Description

technical field [0001] The invention relates to a new application of a thermosetting resin, in particular to a new application of a polybenzoxazine thermosetting resin. Background technique [0002] Metal materials are the substances that human beings rely on for survival, and the corrosion of metals pervades all areas of people's production and life, bringing immeasurable losses to the development of society. Therefore, the development of anti-corrosion related technologies is an urgent need for economic development, environmental protection, energy saving and production safety. [0003] There are many metal anti-corrosion methods currently used. First of all, in the process of equipment design and manufacturing, corrosion-resistant materials can be considered instead of ordinary carbon steel. At present, high-corrosion-resistant materials include stainless steel, titanium and titanium alloys, graphite, glass, plastic materials and ceramics. Wait. However, stainless steel...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D179/04C09D5/08C08G73/06
Inventor 辛忠周长路陆馨
Owner EAST CHINA UNIV OF SCI & TECH
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