Special POZD repairing material for drinking water facilities, and preparation method and repairing construction method thereof

A technology of repairing materials and drinking water, which is applied in the field of repairing materials, can solve problems such as poor adhesion, easy delamination, and inapplicability, and achieve the effects of improving adhesion, preventing damage, and being convenient to use

Active Publication Date: 2019-11-08
青岛国工金承高新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, most of the existing repair materials contain toxic solvents or catalysts, which are not suitable for drinking water pipelines. Moreover, the adhesion between the existing repair materials and the polyurea substrate is poor, and it is easy to be soaked in water. Delamination and shedding, especially not suitable for drinking water pipelines, aquariums and reservoirs and other environments that are in direct contact with water

Method used

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  • Special POZD repairing material for drinking water facilities, and preparation method and repairing construction method thereof
  • Special POZD repairing material for drinking water facilities, and preparation method and repairing construction method thereof
  • Special POZD repairing material for drinking water facilities, and preparation method and repairing construction method thereof

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preparation example Construction

[0037] The embodiment of the present invention also provides a preparation method of the above-mentioned special POZD repair material for drinking water facilities, comprising the following steps:

[0038] S1 Preparation of component A: aliphatic isocyanate and epoxy resin were stirred and reacted at 200°C for 0.5h to obtain reactant A; polyether polyol and hindered amine chain extender were placed in a reaction vessel, and the reaction vessel was heated to 100°C and keep vacuuming for 2h, lower the temperature to 40°C and return to normal pressure, then add the reactant A into the reaction vessel, raise the temperature to 80°C, stir and react for 2h to obtain formazan with an NCO value of 6% to 12%. components;

[0039] S2 Preparation of component B: sterically hindered amine chain extender, difunctional amino-terminated polyether and trifunctional amino-terminated polyether are stirred and mixed evenly to obtain component B.

[0040] In a preferred embodiment, in the step o...

Embodiment 1

[0048] The special POZD repair material for drinking water facilities is solvent-free and catalyst-free. It includes component A and component B at a weight ratio of 0.8:1. The specific composition of component A and component B is shown in Table 1.

[0049] The preparation method of the special POZD repair material for above-mentioned drinking water facilities comprises the following steps:

[0050] (1) Preparation of component A: Stir and react aliphatic isocyanate and epoxy resin at 200°C for 0.5h to obtain reactant A; place polyether polyol in a reaction vessel, heat the reaction vessel to 100°C and evacuate to -0.1Mpa, keep it for 2h, lower the temperature to 40°C and return to normal pressure, add the reactant A into the reaction vessel, raise the temperature to 80°C, stir and react for 2h to obtain component A, its NCO value is shown in Table 1 ;

[0051] (2) Preparation of component B: sterically hindered amine chain extender, difunctional amino-terminated polyether a...

Embodiment 2

[0057] The difference between the special POZD repair material for drinking water facilities provided in this embodiment and embodiment 1 is only: the weight ratio of component A and component B is 1.5:1; the specific composition of component A and component B is different from the embodiment 1, and Component A includes a hindered amine chain extender, see Table 1 for details.

[0058] The difference between the preparation method of the POZD repair material for drinking water facilities provided in this example and Example 1 is that when preparing component A, the polyether polyol and the hindered amine chain extender are placed in the reaction vessel together.

[0059] The difference between the repair construction method of the POZD repair material for drinking water facilities provided in this example and Example 1 is that when the repair materials are mixed, component A and component B are mixed at a weight ratio of 1.5:1.

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Abstract

The invention provides a special POZD repairing material for drinking water facilities, and a preparation method and a repairing construction method thereof, belonging to the technical field of repairing materials. The special POZD repairing material does not contain solvents and heavy metal catalysts, is free of pollution to drinking water, has good adhesion to a substrate to be repaired and canbe applied to local rapid repairing of water-containing facilities such as drinking water conveying pipelines, aquariums and reservoirs. The repairing material comprises a component A and a componentB in a weight ratio of 0.8: 1 to 1.5: 1. The component A comprises 40-96 parts of aliphatic isocyanate, 2.1-10 parts of epoxy resin, 68-150 parts of polyether polyol and 0-10 parts of a hindered aminechain extender, wherein, the aliphatic isocyanate has a carbon number of 10-20, and the polyether polyol has a molecular weight of 1000-4000. The component B includes 5-20 parts of a hindered amine chain extender, 40-120 parts of difunctional amino-terminated polyether, and 25-89 parts of trifunctional amino-terminated polyether.

Description

technical field [0001] The invention belongs to the technical field of repair materials, and in particular relates to a special POZD repair material for drinking water facilities, its preparation method and its repair construction method. Background technique [0002] Since most anti-corrosion and waterproof materials contain solvents or catalysts (catalysts are generally heavy metal complexes), there are few internal anti-corrosion and waterproof materials suitable for drinking water pipelines, aquariums and reservoirs, and polyurea materials are most widely used. For large-area construction, polyurea materials have incomparable advantages, but when local small areas are damaged, the best method is to perform local quick repairs without using spraying equipment. However, most of the existing repair materials contain toxic solvents or catalysts, which are not suitable for drinking water pipelines. Moreover, the adhesion between the existing repair materials and the polyurea ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J175/08C08G18/75C08G18/66C08G18/48C08G18/58C08G18/32C09J5/02
CPCC08G18/10C08G18/58C08G18/722C08G18/755C08G18/758C09J5/02C09J175/08C08G18/48C08G18/6685C08G18/3234C08G18/3237
Inventor 赵阳白晓军代娇娇马福叶于政本
Owner 青岛国工金承高新材料有限公司
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