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Durable self-repairing building coating and preparation method thereof

A kind of architectural coating and self-repairing technology, applied in the direction of coating, etc., can solve the problems of coating cracking and falling off, achieve the effect of strong water absorption capacity and inhibit the expansion of coating cracks

Active Publication Date: 2019-12-13
孙民权
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] Aiming at the problem that the current commonly used architectural coatings are prone to cracking and peeling when they are exposed to sunlight for a long time, this invention proposes a durable self-repairing architectural coating for architectural coatings, thereby effectively realizing the durable self-repairing effect of the coating

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] (1) Put hydroxyethyl cellulose into the container, then add an appropriate amount of 0.2mol / L NaOH solution, place it in a water bath at 45°C and stir for 30 minutes, then slowly add acrylic acid into the container, and then add N,N- Methylbisacrylamide and azobisisobutylamidine hydrochloride were heated to 48°C and reacted for 2 hours, then the product was washed and filtered, then dried in an oven at 60°C to constant weight to obtain a crude graft copolymer, and then The copolymer is crushed and passed through a 100-mesh sieve to obtain a granular product, which is a water-absorbing agent; wherein, the mass ratio of NaOH solution, hydroxyethyl cellulose, acrylic acid, initiator, and crosslinking agent is 100:20:25:3: 2;

[0040] (2) Mix melamine and formaldehyde solution evenly according to the mass ratio of 1:3, then adjust the pH value to 8.5 with a 22% triethanolamine aqueous solution by mass ratio, stir and heat up to 60°C, react until the melamine is completely d...

Embodiment 2

[0044] (1) Put hydroxyethyl cellulose into the container, then add an appropriate amount of 0.2mol / L NaOH solution, place it in a water bath at 45°C and stir for 30 minutes, then slowly add acrylic acid into the container, and then add N,N- Methylbisacrylamide and azobisisobutylimidazoline hydrochloride were heated to 45°C for 3 hours, and the product was washed and filtered, and then dried in an oven at 60°C to constant weight to obtain a crude graft copolymer. Then the copolymer is crushed and passed through a 100-mesh sieve to obtain a granular product, which is a water-absorbing agent; wherein, the mass ratio of NaOH solution, hydroxyethyl cellulose, acrylic acid, initiator, and crosslinking agent is 100:10:15:2 :1;

[0045] (2) Mix melamine and formaldehyde solution evenly according to the mass ratio of 1:3, then adjust the pH value to 8 with a 20% triethanolamine aqueous solution by mass ratio, stir and heat up to 60°C, react until the melamine is completely dissolved, a...

Embodiment 3

[0049] (1) Put hydroxyethyl cellulose into the container, then add an appropriate amount of 0.2mol / L NaOH solution, place it in a water bath at 45°C and stir for 30 minutes, then slowly add acrylic acid into the container, and then add N,N- Methylbisacrylamide and azoisobutylcyanoformamide were heated to 50°C for 1 hour, and the product was washed and filtered, then put into a 60°C oven and dried to constant weight to obtain a crude graft copolymer, and then The copolymer is pulverized and passed through a 100-mesh sieve to obtain a granular product, which is a water-absorbing agent; wherein, the mass ratio of NaOH solution, hydroxyethyl cellulose, acrylic acid, initiator, and crosslinking agent is 100: 30: 35: 4: 3 ;

[0050] (2) Mix melamine and formaldehyde solution evenly according to the mass ratio of 1:3, then adjust the pH value to 9 with a 25% triethanolamine aqueous solution by mass ratio, stir and heat up to 60°C, react until the melamine is completely dissolved, and...

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PUM

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Abstract

The invention provides a durable self-repairing building coating. The building coating is prepared by stirring a microcapsule product, fermentation filter residues, water-based resin, aluminum oxide slurry, titanium dioxide, nanometer silicon dioxide, soybean lecithin and deionized water. The microcapsule product is prepared by the following steps: carrying out a grafting reaction on hydroxyethylcellulose, acrylic acid, an initiator and a cross-linking agent, and performing pulverizing to obtain a granularity product; and adding the granularity product into an emulsion prepared from melamine,formaldehyde, triethanolamine, Tween 80 and water, and carrying out a reaction. The fermentation filter residues are prepared by sealed fermentation of calcium carbonate and bacillus liquid. The coating provided by the invention contains the fermentation filter residues and the microcapsule product with a self-repairing function; after the coating is damaged, water can be absorbed to promote expansion of copolymers in a microcapsule and formation of calcium carbonate crystals, so the effect of crack filling is achieved; meanwhile, the fermentation filter residues endow the coating with the capacity of inhibiting propagation of cracks in the coating; and the obtained coating has the durability and self-repairing effect.

Description

technical field [0001] The invention relates to the technical field of architectural coatings, in particular to a durable self-repairing architectural coating and a preparation method. Background technique [0002] As a polymer-based composite material, coatings are widely used in construction, aerospace, transportation, electronics, sports and military supplies due to their light weight, high strength, excellent mechanical properties, good corrosion resistance, and good electrical properties. Widely used in many fields. However, polymer-based composites have a major drawback: such composites are susceptible to damage from impacts during processing and use. In addition to material damage caused by strong impacts, micro-damages (micro-cracks) of materials are more common, and such micro-damages are usually difficult to detect visually. At this time, there may be no abnormalities on the surface of the material, but the strength of the material has been greatly reduced. Micr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D161/06C09D7/65C09D7/61C09D7/40
CPCC08K2003/2227C08K2003/265C08K2201/011C08L2205/03C09D161/06C09D7/40C09D7/61C09D7/65C08L51/02C08L61/28C08K3/26C08K3/22C08K3/36C08K13/02
Inventor 陈庆杨洁
Owner 孙民权
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