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Epoxy sealing bottom layer material matched with tunnel lining structure protective coating

A protective coating and lining technology, which is applied in coatings, epoxy resin coatings, primers, etc., can solve problems such as low adhesion and peel strength, difficult to meet toughness and strength at the same time, and difficult to meet high-strength polyurethane protection systems. Achieve high adhesion and peel strength, excellent toughness and sag resistance, and good anti-sag performance

Active Publication Date: 2020-08-07
RAILWAY ENG RES INST CHINA ACADEMY OF RAILWAY SCI +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Conventional epoxy primers have high hardness, poor compatibility with high-strength polyurethane, low adhesion and peel strength, and low strength of flexible epoxy, which is difficult to meet the requirements of high-strength polyurethane protection systems.
[0003] Most of the existing epoxy primer products are difficult to satisfy the toughness and strength at the same time, and the primers with high strength and good toughness of the closed bottom are rarely reported in China on the improvement methods of this kind

Method used

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  • Epoxy sealing bottom layer material matched with tunnel lining structure protective coating
  • Epoxy sealing bottom layer material matched with tunnel lining structure protective coating

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] Raw materials of epoxy sealing base material for tunnel lining structure protective coating: Component A: E-44 epoxy resin 60kg, TEGO Dispers 7101kg, 150# solvent oil 20kg, fumed silica 1kg, BYK4101kg, 1250 mesh talc powder 15kg , 800 mesh talc powder 15kg, KH5508kg, BYK-3251kg, BYK-A5601kg; component B: Ancamide276630.7kg; wherein, the mass ratio of component A and component B is 4:1.

[0048] The preparation method of component A comprises the following steps:

[0049] Weigh each raw material, then add E-44 epoxy resin, TEGO Dispers 710, 150# solvent oil, fumed silica, BYK 410, 1250 mesh talc powder, 800 mesh talc powder, BYK-325, BYK-A560 In the mixing tank, set the speed at 1200r / min, stir at high speed for 30min, pour it into a three-roll mill for grinding, the grinding temperature is 40°C, and when the grinding fineness reaches 100μm, add KH 550 and mix evenly, filter to obtain the compound Part A.

[0050] The preparation method of the epoxy sealing base materi...

Embodiment 2

[0052]Raw materials of epoxy sealing base material for tunnel lining structure protective coating: Component A: E-44 epoxy resin 50kg, TEGO Dispers 7100.3kg, 150# solvent oil 15kg, fumed silica 0.6kg, BYK4100.6kg, 1250 Mesh talcum powder 8.3kg, 800 mesh talcum powder 7.2kg, KH5506kg, BYK-325, 0.8kg, BYK-A5600.8kg; component B: Ancamide276626.3kg; wherein, the mass ratio of component A to component B is 3.4 :1.

[0053] The preparation method of component A comprises the following steps:

[0054] Weigh each raw material, then add E-44 epoxy resin, TEGO Dispers 710, 150# solvent oil, fumed silica, BYK 410, 1250 mesh talc powder, 800 mesh talc powder, BYK-325, BYK-A560 In the mixing tank, set the speed at 1200r / min, stir at high speed for 30min, pour it into a three-roll mill for grinding, the grinding temperature is 70°C, and when the grinding fineness reaches 100μm, add KH 550 and mix evenly, filter to obtain the compound Part A.

[0055] The preparation method of the epoxy ...

Embodiment 3

[0057] Raw materials of epoxy sealing bottom material for tunnel lining structure protective coating: Component A: E-44 epoxy resin 40kg, TEGO Dispers 7100.5kg, 150# solvent oil 10kg, fumed silica 0.5kg, BYK4100.5kg, 1250 Mesh talc powder 5kg, 800 mesh talc powder 5kg, KH5502kg, BYK-3250.3kg, BYK-A5600.3kg; component B: Ancamide276623.7kg; wherein, the mass ratio of component A to component B is 2.7:1.

[0058] The preparation method of component A comprises the following steps:

[0059] Weigh each raw material, then add E-44 epoxy resin, TEGO Dispers 710, 150# solvent oil, fumed silica, BYK 410, 1250 mesh talc powder, 800 mesh talc powder, BYK-325, BYK-A560 In the mixing tank, set the speed at 1200r / min, stir at high speed for 30min, pour it into a three-roller grinder for grinding, the grinding temperature is 50°C, and when the grinding fineness reaches 100μm, add KH 550 and mix evenly, filter to obtain the compound Part A.

[0060] The preparation method of the epoxy seal...

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PUM

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Abstract

The invention discloses an epoxy sealing bottom layer material matched with a high-strength single-component tunnel lining structure protective coating. The material comprises a component A and a component B in a mass ratio of (2.7:1) to (4: 1), wherein the component A is prepared from epoxy resin, a thixotropic agent, a wetting dispersant, 150 # solvent oil, talcum powder, KH550, a leveling agentand an antifoaming agent; and the component B is modified polyamide. The curing agent, the auxiliary agentS for the coating and the thixotropic material are compounded to prepare the epoxy sealing bottom layer material matched with the high-strength single-component tunnel lining structure protective coating, so that the adhesive force between the epoxy sealing bottom layer material and concrete,the adhesive force between the epoxy sealing bottom layer material and a polyurethane layer and the peel strength are met, and the epoxy sealing bottom layer material has excellent toughness and sagging resistance.

Description

technical field [0001] The invention relates to the technical field of paint primers, and more specifically relates to an epoxy sealing primer used for matching protective paints for tunnel lining structures. Background technique [0002] After the operation of the tunnel, the lining concrete structure has various defects or diseases due to various reasons such as geological disasters, operating years, and climatic conditions. Defects such as voids behind the lining, honeycomb pockmarks, dislocation of lining construction joints, etc. Defects in the quality of tunnel lining can easily lead to material cracking, lining falling off, water leakage and other diseases, which seriously threaten the safety of line operation. Adding a layer of polyurethane system coating with a certain elongation and high strength on the surface of the tunnel lining can solve the problem of lining falling off. Conventional epoxy primers have high hardness, poor compatibility with high-strength pol...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D163/00C09D5/00C09D7/61C09D7/65
CPCC09D163/00C09D5/002C09D7/61C09D7/65C08K2201/014C08L75/02C08K3/36C08K3/34C08K13/02Y02E10/20
Inventor 王志伟马伟斌田四明郭小雄赵鹏王子洪安哲立邹文浩
Owner RAILWAY ENG RES INST CHINA ACADEMY OF RAILWAY SCI