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Epoxy elastic putty for surface of concrete

A concrete surface, elastic putty technology, applied in the direction of filling slurry, etc., can solve the problems of cracks in the putty layer, poor adhesion between layers, insufficient flexibility, etc., to reduce the curing crosslinking density, easy to scrape, Excellent adhesion effect

Inactive Publication Date: 2015-04-08
CHINA NAT OFFSHORE OIL CORP +3
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, ordinary epoxy putty has high strength and insufficient flexibility. When the concrete is deformed due to thermal expansion and contraction, the putty layer is prone to cracks; the elastic putty based on styrene-acrylic emulsion or pure acrylic emulsion is not durable in crack resistance. , the interlayer adhesion to the concrete surface is worse than that of epoxy putty, and it is easy to bulge and fall off, which cannot meet the requirements of national key projects, especially long-term anti-corrosion facilities.

Method used

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  • Epoxy elastic putty for surface of concrete
  • Epoxy elastic putty for surface of concrete
  • Epoxy elastic putty for surface of concrete

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Embodiment 1 prepares epoxy elastic putty

[0019] (1) A component

[0020] ① See Table 1 for the formula of component A.

[0021] Table 1

[0022]

[0023] In the table: NPEL-128 is a product of Nanya Epoxy Resin Co., Ltd.; YDF-172 is a product of Guodu Chemical (Kunshan) Co., Ltd.; TLA-100 is a product of Tianlun Chemical Co., Ltd.

[0024] ② Preparation of component A

[0025] In the container, first add liquid epoxy resin and flexible epoxy resin, then add mixed diluent, start stirring, control the speed at 300-500r / min, stir for 10-15min, then add anatase titanium dioxide, heavy For calcium carbonate and talcum powder, the speed is controlled at 800-1200r / min. After adding anatase titanium dioxide, heavy calcium carbonate, and talc powder, it needs to be stirred for 10-15 minutes. After adding all of them, stir for another 20-30 minutes. .

[0026] (2) B component

[0027] ① See Table 2 for the formula of component B.

[0028] Table 2

[0029] c...

Embodiment 2

[0038] Embodiment 2 prepares epoxy elastic putty

[0039] (1) A component

[0040] ① See Table 4 for the formula of component A.

[0041] Table 4

[0042]

[0043] In the table: NPEL-128, YDF-172, TLA-100 are the same as Table 1.

[0044] ② Preparation of component A

[0045] The preparation method is the same as that of the preparation example 1A component.

[0046] (2) B component

[0047] ① See Table 5 for the formula of component B.

[0048] table 5

[0049] components

Raw material name and specification

Dosage, (wt%)

polyamide resin

Aradur125, amine value 340~370mgKOH / g

10

Polyether modified amine

Aradur3225, amine value 310~340mgKOH / g

25

Talc powder

Commercially available industrial products, 400 mesh

30

Ground calcium carbonate

Commercially available industrial products, 800 mesh

25

Anti-sagging agent

Fumed silica, A-200

1.5

mixed diluent

A mixture of xylene a...

Embodiment 1 and 2

[0064] 1. epoxy elastic putty (embodiment 1 and 2 system);

[0065] ② Epoxy putty is NC-16, a product of CNOOC Changzhou Coating Chemical Research Institute;

[0066] ③ The elastic putty with pure acrylic emulsion as the base resin is CTD-7305, a product of CNOOC Changzhou Paint Chemical Research Institute.

[0067] (3) The test results are shown in Table 7.

[0068] Table 7

[0069]

[0070] As can be seen from the test results of Table 7: the freezing cracking performance and the pull-off method adhesion of the epoxy elastic putty of the present invention (embodiment 1 and 2 system) are all better than the elastic putty with pure acrylic emulsion as matrix resin; the pull-off method The adhesion is comparable to epoxy putty, but the freeze cracking performance is obviously better than epoxy putty. It has been proved that the flexible epoxy resin (bisphenol A epoxy resin modified by dimer acid glycidyl ester) introduced in the A component of the present invention, the l...

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Abstract

The invention relates to epoxy elastic putty for the surface of concrete. The epoxy elastic putty is composed of a componend a component B; the component A is prepared from the following ingredients in percentage by weight: 5-20% of liquid epoxy resin, 5-20% of flexible epoxy resin, 3-10% of anatase titanium dioxide, 10-30% of talcum powder, 30-60% of heavy calcium carbonate, and 5-15% of a mixed thinner; the component B is prepared from the following ingredients in percentage by weight: 10-20% of polyamide resin, 10-25% of polyether modified amine, 40-60% of heavy calcium carbonate, 15-35% of talcum powder, 5-15% of a mixed thinner and 0.5-2% of an anti-sagging agent, and the mass ratio of the component A and the component B is 10 to (3-4). According to the epoxy elastic putty, the advantages of epoxy putty and pure acrylic emulsion elastic putty are combined, the epoxy elastic putty has excellent adhesive force with a concrete base material, has good reelability and toughness, and has the good anti-crack property in a high-low temperature environment.

Description

technical field [0001] The invention relates to a putty, in particular to an epoxy elastic putty for concrete surfaces. Background technique [0002] Concrete is an inorganic material composed of cement, gravel, water and admixtures. It is hard and wear-resistant, so it is widely used in construction and civil engineering. It is currently the most widely used structural material in the world. Waterproofing, anticorrosion and thermal insulation of concrete surfaces have become more and more important and common means of building protection and energy saving. [0003] Putty, as the main supporting material of paint, its main function is to fill the large pits and small gaps in the base of the concrete surface, so that the paint can be applied on the basically flat base surface, so as to obtain a good coating effect. Since the concrete wall is a cement-based material, the cement-based material has inherent moisture and moisture permeability. When the ambient temperature drops ...

Claims

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Application Information

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IPC IPC(8): C09D5/34
CPCC09D5/34
Inventor 张睿朱亚君刘志远倪维良赵宝华
Owner CHINA NAT OFFSHORE OIL CORP
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