Preparation method for self-healing intelligent waterproof coating

A waterproof coating, self-healing technology, applied in the direction of coating, can solve the problems of easy waterproof and water channeling, not environmentally friendly, not wear-resistant, etc., to achieve good stability

Active Publication Date: 2018-04-20
广东省林派科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Traditional waterproof coatings mainly include the following types: (1) Polyurethane waterproof coating, polyurethane waterproof coating is a waterproof coating made of polyurethane resin as the main raw material for on-site construction. This coating has high tensile strength, good elasticity and elongation at break However, the disadvantages of this coating are that it is not environmentally friendly, not wear-resistant, and prone to water channeling.
(2) Polymer cement-based waterproof coating, the disadvantage is that it is not wear-resistant, and it is easy to waterproof and channel water
(3) K11 waterproof coating, the disadvantage is that it is not wear-resistant and the waterproof effect is poor
(4) Microcapsule self-healing waterproof coating, the principle is that the microcapsules will break when there is a crack in the matrix, and the released healing agent will reach the cracked surface through capillary action, and the healing agent will contact the catalyst embedded in the matrix to initiate polymerization and repair Cracks, the disadvantage of this coating is that the catalyst will decompose above 120°C, and the polymerization reaction will continue without adding a terminator, which is uncontrollable, and the catalyst has certain toxicity

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] A preparation method of a self-healing intelligent waterproof coating, comprising the steps of:

[0032] S1. put into the water of 400 parts by weight in reactor;

[0033] S2. Slowly add 80 parts by weight of sodium hydroxide to the water of S1 under stirring state;

[0034] S3. The temperature is reduced to 30 degrees, and 80 parts by weight of methyl silicic acid are slowly added in portions;

[0035] S4. The reaction kettle is gradually heated to 90 degrees to carry out the substitution reaction, and 10 parts by weight of catalyst triethanolamine is added after 30 minutes, and kept at 90 degrees to 1.5 hours to obtain a transparent liquid;

[0036] S5. After 24 hours, the liquid was filtered to obtain a clear liquid after filtration;

[0037] S6. put the water of 800 parts by weight into the stirring tank, add the clarified liquid obtained by 100 parts by weight of S5 under the state of stirring;

[0038] S7. After stirring for 30 minutes, put 20 parts by weight o...

Embodiment 2

[0041] A preparation method of a self-healing intelligent waterproof coating, comprising the steps of:

[0042] S1. put into the water of 700 parts by weight in reactor;

[0043] S2. Slowly add 100 parts by weight of sodium hydroxide to the water of S1 under stirring state;

[0044] S3. The temperature is reduced to 30 degrees, and 90 parts by weight of methyl silicic acid are slowly added in portions;

[0045] S4. The temperature of the reaction kettle was gradually raised to 90°C to carry out the substitution reaction. After 30 minutes, 8 parts by weight of the catalyst triethanolamine was added and kept at 90°C for 2 hours to obtain a transparent liquid.

[0046] S5. After 24 hours, the liquid was filtered, and a clear liquid was obtained after the filtration.

[0047] S6. put the water of 600 parts by weight into the stirring tank, add the clarified liquid obtained by S5 of 100 parts by weight in the state of stirring;

[0048] S7. After stirring for 20 minutes, put int...

Embodiment 3

[0050] A preparation method of a self-healing intelligent waterproof coating, comprising the steps of:

[0051] S1. put into the water of 500 parts by weight in reactor;

[0052] S2. Slowly add 90 parts by weight of sodium hydroxide to the water of S1 under stirring state;

[0053] S3. The temperature is reduced to 30 degrees, and 100 parts by weight of methyl silicic acid are slowly added in stages;

[0054] S4. The temperature of the reaction kettle was gradually raised to 90°C to carry out the substitution reaction. After 30 minutes, 5 parts by weight of the catalyst triethanolamine was added and kept at 90°C for 1.5 hours to obtain a transparent liquid.

[0055]S5. After 24 hours, the liquid was filtered, and a clear liquid was obtained after the filtration.

[0056] S6. put the water of 500 parts by weight into the mixing tank, and add the clarified liquid obtained by S5 of 100 parts by weight in the state of stirring;

[0057] S7. After stirring for 30 minutes, put 10...

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PUM

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Abstract

The invention discloses a preparation method for a self-healing intelligent waterproof coating. The waterproof coating prepared by using the preparation method provided by the invention can realize self-healing; when cracks and water seepage are generated in concrete, water excites chemical molecules in the coating and unhydrated components like calcium silicate gel, calcium hydroxide and calciumsulphoaluminate in the concrete for reaction to generate a novel crystallized crystal, so the self-healing and waterproof purposes of the concrete are achieved. In addition, the waterproof coating provided by the invention has a dosage form of water aqua, and has good stability compared with a conventional powdery permeable crystalline-type waterproof material. According to the invention, a majority of the powdery permeable crystalline-type waterproof material provided by the invention is cement, so activity is decreased with the passage of time after the cement is stored for a certain periodof time (28 days), and the effect of permeable crystallization is indirectly affected.

Description

technical field [0001] The invention relates to the technical field of paint preparation, in particular to a preparation method of a self-healing intelligent waterproof paint. Background technique [0002] Concrete is a brittle material. During use, under the action of external forces or other factors (temperature and humidity changes, uneven subsidence, etc.), micro-cracks or local damage will occur, allowing various aggressive media to enter the interior through cracks on the concrete surface , resulting in a vicious cycle of durability and mechanical properties of concrete structures or components, and in severe cases may even cause macroscopic cracks and brittle fractures, causing irreparable casualties and economic losses to the society. Therefore, waterproof coatings are needed to repair in time. [0003] Traditional waterproof coatings mainly include the following types: (1) Polyurethane waterproof coating, polyurethane waterproof coating is a waterproof coating made...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D123/08C09D7/61C09D7/63
CPCC08K3/34C08K3/36C08K5/54C08K2003/324C09D123/0853
Inventor 林小铁
Owner 广东省林派科技有限公司
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