Preparing method of long-acting natural stone protective agent

A technology of protective agent and stone material, which is applied in the field of preparation of long-acting natural stone protective agent, which can solve the problems of short duration of protective effect and inability to maintain the breathing and air permeability of stone materials, so as to achieve protection of air permeability and natural texture, and long duration of action , the effect of broad market prospects

Inactive Publication Date: 2017-03-15
CHANGZHOU YAHUAN ENVIRONMENTAL PROTECTION TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The main technical problem to be solved by the present invention is to solve the problem that the traditional wax stone protective agent only forms a film on the surface of the stone, the protective effect lasts for a short time, and the original pores of the stone are closed after the film is formed, and the breathability of the stone cannot be maintained. A preparation method of a long-acting stone protective agent. The invention first uses lichen as a raw material, grinds it into powder after removing impurities and drying it, then extracts it with methanol and concentrates the filtrate to obtain an extract paste, and then uses ethyl orthosilicate Monodisperse alkaline silica sol is prepared as a silicon source. After mixing with deionized water, adjust the pH with oxalic acid, then add absolute ethanol to stand for aging, and modify the surface by adding trimethylchlorosilane to make it hydrophobic. Finally, mix the filtered filter residue with the standby extract paste in proportion to obtain a long-lasting natural stone protective agent
The active ingredients in the protective agent obtained in the present invention permeate into the interior of the stone with the solvent, and after the solvent volatilizes naturally, the effective substance combines with the stone crystal to form a three-dimensional mesh hydrophobic protective film on the surface and inside of the stone, preventing external pollution from penetrating, and preventing the interior of the stone from The pollution seeping out of the bottom layer solves the problem that the traditional wax protective agent only forms a film on the surface of the stone and closes the pores of the stone

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0016] Weigh 150g of lichen, wash it with deionized water for 3 times to remove impurities, then transfer the lichen to an oven, and dry it to constant weight at a temperature of 105°C, then transfer the dried lichen to a mortar and grind into powder, then pour the lichen powder into a flask filled with 1200mL of methanol solution with a mass fraction of 80%, and then place the flask in a digital speed measuring constant temperature magnetic stirrer at a temperature of 75°C and a speed of 600r / min. , stirred at constant temperature for 2 hours, filtered, removed the filter residue, transferred the obtained filtrate to a rotary evaporator, and concentrated it by rotary evaporation at a temperature of 80°C for 3 hours. After cooling to room temperature naturally, the extract paste was obtained. Ethyl silicate and 160 mL of absolute ethanol were added to a three-necked flask with a reflux condenser, and then the flask was placed in a magnetic stirrer with a digital speed measureme...

example 2

[0019] Weigh 175g of lichen, wash it with deionized water 4 times to remove impurities, then transfer the lichen to an oven, and dry it to constant weight at a temperature of 107.5°C, then transfer the dried lichen to a mortar and grind into powder, then pour the lichen powder into a flask filled with 1350mL of methanol solution with a mass fraction of 82.5%, and then place the flask in a magnetic stirrer with a digital speed measurement and constant temperature at a temperature of 77.5°C and a speed of 700r / min. , stirred at constant temperature for 3 hours, filtered, removed the filter residue, transferred the obtained filtrate to a rotary evaporator, concentrated it by rotary evaporation at a temperature of 82.5°C for 4 hours, and cooled it to room temperature naturally to obtain an extract paste, which was then used to measure 110 mL of normal Ethyl silicate and 170mL of absolute ethanol were added to a three-necked flask with a reflux condenser, and then the flask was plac...

example 3

[0022] Weigh 200g of lichen, wash it with deionized water for 5 times to remove impurities, then transfer the lichen to an oven, and dry it to constant weight at a temperature of 110°C, then transfer the dried lichen to a mortar and grind into powder, then pour lichen powder into a flask filled with 1500mL of methanol solution with a mass fraction of 85%, and then place the flask in a magnetic stirrer with a digital speed measurement and constant temperature at a temperature of 80°C and a speed of 800r / min. , stirred at constant temperature for 4 hours, filtered, removed the filter residue, transferred the obtained filtrate to a rotary evaporator, concentrated it by rotary evaporation at a temperature of 85°C for 5 hours, and cooled it to room temperature naturally to obtain an extract paste, which was then used to measure 120 mL of normal Ethyl silicate and 180 mL of absolute ethanol were added to a three-necked flask with a reflux condenser, and then the flask was placed in a...

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Abstract

The invention discloses a preparing method of a long-acting natural stone protective agent, and relates to the technical field of stone protection. The preparing method comprises the steps of at first using lichen as a raw material, using methyl alcohol to extract the lichen, conducting concentration on filter liquor to obtain extractive pasty body, then using ethyl orthosilicate as a silicon resource to prepare and obtain a monodispersing silica solution; mixing the silica solution with deionized water, afterwards using oxalic acid to adjust ph, then adding absolute ethyl alcohol into the mixture to be subjected to still standing and aging, conducting surface finish by adding trimethylchlorosilane so as to endow the silica solution with hydrophobicity, finally mixing filter residues after being filtered with standby extractive pasty body and the like in proportion, and obtaining the long-acting natural stone protective agent. According to the preparing method of the long-acting natural stone protective agent, the effective components in the long-acting natural stone protective agent infiltrates inside a stone along with a solvent, and after the solvent volatilizes naturally, the effective components then combine with crystals and form a three-dimensional net-shape dewatering protective film on the surface of and inside the stone, thus foreign polluant is prevented from permeating in, pollutant inside and at the bottom of the stone is prevented from permeating out; meanwhile, the disadvantages that traditional wax type protective agent can only form films on the surface of the stone and thus block holes of the stone are solved.

Description

technical field [0001] The invention discloses a preparation method of a long-acting natural stone protective agent and relates to the technical field of stone protection. Background technique [0002] The chemical damage of stone generally means that the composition of the stone reacts with other chemical substances, causing the stone to lose its composition, loosen, crack and reduce its physical properties, resulting in the gradual weathering of the stone and being continuously taken away by water, forming holes, grooves, Cracks; those that cannot be taken away by water will form a sharp and hard cortex, which is different from the original stone structure, and will eventually appear soaked in water, scaled off, and some black layers will appear. In addition to natural chemical damage to stone, human life also causes chemical damage to stone, such as cleaning decorative stone with acidic cleaning solution, strong acid and strong alkali in kitchen and bathroom will cause ch...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B41/50
CPCC04B41/5035
Inventor 高玉梅许洪祥郭剑
Owner CHANGZHOU YAHUAN ENVIRONMENTAL PROTECTION TECH
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