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Organosilicon fluorine material for sealing and protecting irony cultural relics and method of producing the same

An organic silicon and fluorine material technology, applied in the field of silicon-fluorine materials, can solve the problems of greasy surface, poor temperature resistance, difficult to achieve anti-corrosion performance and aging resistance of iron cultural relics, and achieve good film-forming ability, Strong anti-corrosion effect

Inactive Publication Date: 2009-04-08
广州市白云文物保护工程有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The earliest sealing material for iron cultural relics is paraffin wax, which has a certain sealing effect, but has the characteristics of poor temperature resistance, unstable film-forming state, and greasy feeling on the surface.
With the development of chemical science and technology, people gradually use synthetic resin as the matrix as the sealing agent. At present, the widely used sealing materials include polyacrylic resin, polyurethane resin, silicone resin, silicone acrylic resin, etc. Although these resins are widely used, It also has a certain protective effect on iron cultural relics, but they have some performance defects in aging resistance, waterproof and antifouling, glare, permeability, reprocessing, adhesion, etc., and it is difficult to achieve both the improvement of iron cultural relics Excellent anti-corrosion performance and aging resistance, and in line with the principle of "colorless, transparent, no glare, keeping the original appearance of cultural relics, and reprocessing" for the protection of cultural relics
[0004] At present, there are few domestic and foreign research reports on the use of hydrophobic sealing materials for iron cultural relics. It is generally required that the sealing materials for iron cultural relics should not only have the function of hydrophobic and antifouling, but also meet the requirements of the relevant principles in the "Cultural Relics Protection Law". Performance: reprocessability; basic transparency, no glare; good aging resistance; good anti-corrosion performance; high tear resistance; expansion coefficient as close as possible to metal, etc.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] At room temperature, 50 parts of hydroxyfluorosilicone oil with a hydroxyl value of 6% and 50 parts of deionized water were placed in a reaction flask, heated to 85°C, and 2 parts of 10 -5 mol / L dilute hydrochloric acid as a catalyst, and then slowly drop mixed organic silicon mixed monomers (wherein 40 parts of hydroxyl silicone oil with a hydroxyl value of 8%, 10 parts of methyltrimethoxysilane, 50 parts of phenyltrimethoxy silane, 10 parts of octyltrimethoxysiloxane), let it fully react for 4 hours. Then add 1 part of 5% sodium carbonate solution to adjust the pH value to neutral, and continue to heat up to 95 ° C for further aging for 2 hours. Distill under reduced pressure to remove small molecular substances, then cool to room temperature, and filter to obtain 100 parts of colorless and translucent organosilicon fluoropolymer, then add 0.1 part of nano-silica, stir at high speed for 3 hours to a homogeneous state, and let it stand After defoaming, dilute to 20% w...

Embodiment 2

[0023] At room temperature, 50 parts of hydroxyfluorosilicone oil with a hydroxyl value of 8% and 50 parts of deionized water were placed in a reaction flask, heated to 85°C, and 2 parts of 10 -5 mol / L dilute hydrochloric acid as a catalyst, and then gradually and slowly drop mixed organic silicon mixed monomers (40 parts of hydroxyl silicone oil with a hydroxyl value of 3%, 20 parts of methyltriethoxysilane, 40 parts of phenyltrimethoxy base silane, 5 parts of octyltrimethoxysiloxane), and make it fully react for 4 hours. Then add 1 part of 10% ammonia water to adjust the pH value to neutral, and continue to heat up at 115°C for further aging for 2 hours. Distill under reduced pressure to remove small molecular substances, then cool to room temperature, and filter to obtain 95 parts of colorless and translucent organic silicon fluoropolymer, then add 0.4 parts of nano-titanium dioxide, stir at high speed for 5 hours to a homogeneous state, and let it stand for defoaming Afte...

Embodiment 3

[0025] At room temperature, 50 parts of hydroxyfluorosilicone oil with a hydroxyl value of 6% and 50 parts of deionized water were placed in a reaction bottle, heated to 75°C, and 1 part of 10 -5 mol / L phosphoric acid as a catalyst, and then gradually drop the mixed organosilicon mixed monomer (20 parts of hydroxyl silicone oil with a hydroxyl value of 8%, 20 parts of methyltrimethoxysilane, 50 parts of phenyltrimethoxysilane , 10 parts of octyltrimethoxysiloxane) to fully react for 4 hours. Then add 1 part of 5% sodium carbonate solution to adjust the pH value to neutral, and continue to heat up to 105 ° C for further aging for 2 hours. Distill under reduced pressure to remove small molecular substances, then cool to room temperature, and filter to obtain 105 parts of colorless and translucent organosilicon fluoropolymer, then add 0.2 parts of nano-silica, stir at high speed for 4 hours to a homogeneous state, and let stand After defoaming, dilute to 20% with acetone to obta...

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PUM

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Abstract

The invention discloses an organic fluosilicic material used for sealing and protecting an iron cultural relic; the main components of the organic fluosilicic material consists of a main agent, a flatting silica and a thinner; wherein, the component of the main agent is an organic fluosilicic polymer; and the organic fluosilicic polymer is prepared by the hydrolytic polycondensation reaction of an organic silicon mixed monomer and hydroxy fluosilicic oil under the existence of an acid catalyst. The invention also discloses a preparation method of the organic fluosilicic material used for sealing and protecting the iron cultural relic. Test shows that after the organic fluosilicic material is adopted for carrying out sealing and protection on the surface of the iron cultural relic, protections of colorless, transparency, lightless and maintaining the original appearance on the iron cultural relic are realized; the corrosion resistance and the aging resistance are very good; moreover, the organic fluosilicic material has better self-cleaning performance. Not only can the problem of changing the original appearance of the cultural relic commonly existed in iron cultural relic sealing and protecting materials be solved, but also the corrosion resistance and the weatherability can be greatly improved.

Description

technical field [0001] The invention relates to a silicon-fluorine material used for the anti-corrosion protection of outdoor or stored iron cultural relics, and also relates to a preparation method of the silicon-fluorine material used for the anti-corrosion protection of outdoor or stored iron cultural relics. Background technique [0002] Because the chemical properties of iron are more active than metals such as gold, silver, and copper, and their chemical stability is poor, iron cultural relics are more likely to corrode. From the analysis of the cause of corrosion, the electrochemical corrosion with the participation of oxygen and water mainly occurred on iron cultural relics. In order to avoid electrochemical corrosion reactions, oxygen and water should be isolated as much as possible, and it should be protected in the best environment without corrosion conditions. Thereby improving the corrosion resistance of iron cultural relics. Therefore, after cleaning, rust rem...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D183/08C09D5/08C23F15/00
Inventor 范敏傅英毅马振华陈粤陈芳马清林
Owner 广州市白云文物保护工程有限公司
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