CN104961496A - Preparation method for anti-alkali efflorescence agent used for stone material laid on red land - Google Patents
Preparation method for anti-alkali efflorescence agent used for stone material laid on red land Download PDFInfo
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Abstract
The invention provides a preparation method for an anti-alkali efflorescence agent used for a stone material laid on red land. The preparation method comprises the following steps: adding trifluoroethyl methacrylate, methacrylic acid, vinyltriethoxysilane and poly(dodecyltrimethylsilane) into butyl acetate so as to obtain a reaction solution; then adding a certain amount of a chain transferring agent and an initiator into butyl acetate so as to obtain an activation solution; heating the reaction solution, maintaining the temperature of the reaction solution to be constant at 70 to 80 DEG C and then gradually feeding the activation solution into the reaction solution so as to obtain the anti-alkali efflorescence agent; and diluting the anti-alkali efflorescence agent obtained in the step 3 into a solution with weight percentage of 2 to 5% and uniformly coating the surface of the stone material with the solution. The copolymer, i.e., the anti-alkali efflorescence agent, prepared in the invention has low surface free energy, high resistance to water and pollution and strong bonding force with the stone material, and can effectively protect the stone material for a long time; and the preparation method for the anti-alkali efflorescence agent is simple, has good controllability and is favorable for industrial production.
Description
Technical field
The present invention relates to the preparation method of stone protectant.More particularly, the present invention relates to preparation method laterite ground paving stone material to the anti-accumulation of salt in the surface soil agent of excellent barrier propterty.
Background technology
Stone material is one of ancient material of construction, due to its aboundresources, ultimate compression strength is high, good endurance, wear resistance be strong, by long-term for building materials and concrete aggregates such as building foundation and wall bodies.But due to the physical structure of stone material porous and the chemical constitution on rock forming mineral surface, stone material is as easy as rolling off a log be subject to the erosion of water or other liquid or pollutent and there is " accumulation of salt in the surface soil ", pollute, " pathology " phenomenon such as tarnish, had a strong impact on it and normally used.Wherein, rock broken weathering formation gradually after long-term weathering effect laterite, containing more ferro element and aluminium element etc., therefore on hot soil after paving stone material, As time goes on, particularly open air meets with rainwater or wet weather repeatedly, ferro element and aluminium element etc. are soluble in water, and ooze out from stone material seam or pore, very easily form the accumulation of salt in the surface soil, stone surface patch phenomenon is even more serious.
Traditional technique is generally after ground stone has been mated formation and quality inspection is qualified, carried out last road cleaning, waxing polishing operation.But due to the general density of stone material and hardness large, its general wax in surface is not easy to enclose, and life cycle is short, wax will go bad in a short period of time, change the original outward appearance of stone material and affect stone surface gloss, and the original ventilation property of stone material can be destroyed and form new larger pathology at stone material built up inside on the other hand.
Summary of the invention
As the result of various extensive and careful research and experiment, the present inventor has been found that, when trifluoroethyl methacrylate, methacrylic acid, vinyltriethoxysilane and poly-dodecyl trimethyl silane carry out quarternary copolymerized, progressively dropping chain-transfer agent and initiator effectively can improve reaction conversion ratio, improve the hydrophobic nature, ventilation property and the weathering resistance that prepare anti-accumulation of salt in the surface soil agent.Based on this discovery, complete the present invention.
An object of the present invention is to solve at least the problems referred to above and/or defect, and the advantage will illustrated at least is below provided.
A further object of the invention is to provide a kind of preparation method of the anti-accumulation of salt in the surface soil agent for being laid on laterite stone material on the ground, it can prepare the anti-accumulation of salt in the surface soil agent with excellent properties, to obtain better perviousness and more excellent water-proof stain-resistant, improve the service efficiency of anti-accumulation of salt in the surface soil agent, and technique distance is simple, controllability is high.
In order to realize according to these objects of the present invention and other advantage, provide a kind of preparation method of the anti-accumulation of salt in the surface soil agent for being laid on laterite stone material on the ground, it comprises the following steps:
Step one: the vinyltriethoxysilane of the methacrylic acid of the trifluoroethyl methacrylate of 30 ~ 40 weight parts, 5 ~ 10 weight parts, 5 ~ 10 weight parts, the poly-dodecyl trimethyl silane of 1 ~ 5 weight part are joined in the butylacetate of 20 ~ 40 weight parts, be warming up to 50 ~ 60 DEG C, stir 20 ~ 40min, obtain reaction solution;
Step 2: joined in the butylacetate of 1 ~ 10 weight part by the initiator of the chain-transfer agent of 0.5 ~ 1.5 weight part and 0.5 ~ 1.5 weight part, is warming up to 40 ~ 60 DEG C and stirs 15 ~ 30min, obtain activation solution;
Step 3: described reaction solution to be heated up and constant at 70 ~ 80 DEG C of temperature, then by described activation solution gradually stream add in described reaction solution, it is 10 ~ 15h that described stream adds the time, obtains anti-accumulation of salt in the surface soil agent;
Step 4: the anti-accumulation of salt in the surface soil dilution agent that step 3 is obtained become weight fraction be 2 ~ 5% solution, then stone surface is spread evenly across, the concentration of anti-accumulation of salt in the surface soil dilution agent can not be too high, when its concentration higher than 15% time, the viscosity of diluent is too high and not easily permeate in stone material, and stone material has obvious film vestige.
Preferably, wherein, the operation of described step one, step 2 and step 3 is carried out all under nitrogen protection, to avoid the interference of oxygen, improves the controllability of reaction.
Preferably, wherein, the add-on of described chain-transfer agent is 0.5 ~ 1 weight part, wherein, described chain-transfer agent is the size by regulating molecular weight of copolymer, control the surface property of multipolymer, the add-on of chain-transfer agent can not be too low, otherwise the molecular weight of multipolymer can be excessive, cause multipolymer cross sticky and affect its solvability, thus affect anti-accumulation of salt in the surface soil agent too early film forming and reduce depth of penetration in process of osmosis, the add-on of chain-transfer agent can not be too high, otherwise molecular weight of copolymer is on the low side, hydrophobic oleophobic performance is deteriorated;
Preferably, wherein, the add-on of described initiator is 0.8 ~ 1.2 weight part, but the consumption of initiator can not be too high, otherwise its residue can become impurity in the copolymer, affects the barrier propterty of multipolymer.
Preferably, wherein, described chain-transfer agent is selected from any one or the two or more materials in methacrylic sulfonic acids sodium, lauryl mercaptan, dithioesters, 3-thiohydracrylic acid, Virahol.
Preferably, wherein, described initiator is selected from any one in benzoyl peroxide, lauroyl peroxide, cyclohexanone peroxide, di-isopropyl peroxydicarbonate, azo diisopropyl nitrile, 2,2'-Azobis(2,4-dimethylvaleronitrile).
Preferably, wherein, in described step 4, the number of times of anti-accumulation of salt in the surface soil agent coating is 2 ~ 5 times, thus ensure the protective layer forming the very strong waterproof of one deck, impervious, antifouling effect at stone surface, and after stone surface, leave less space, stone material aqueous vapor appear impregnable while, anti-sealing or other pollutents infiltrate surface layer from the end or face.
Preferably, wherein, the timed interval of described coating is 1 ~ 3h, and to make, anti-accumulation of salt in the surface soil agent is more effective immerses in the space tentatively reduced again, forms finer and close protective layer.
The present invention at least comprises following beneficial effect:
(1) the quaternary fluorinated copolymer of trifluoroethyl methacrylate, methacrylic acid, vinyltriethoxysilane and poly-dodecyl trimethyl silane formation, there is lower surface free energy, water-proof stain-resistant performance is high, and strong with stone material bonding force, for a long time effectively can protect stone material;
(2) by by chain-transfer agent and initiator progressively stream add in reaction solution, the Effective Regulation molecular size range of multipolymer, the molecular weight of copolymer obtained is more single, and transformation efficiency is significantly improved;
(3) rational anti-accumulation of salt in the surface soil dilution agent concentration and coating method, both ensure that the good waterproof antifouling effect of anti-accumulation of salt in the surface soil layer, in turn ensure that the air permeable effect of stone material, prevented the reduction in the stone material inner work-ing life caused because moisture accumulates;
(4) preparation method of anti-accumulation of salt in the surface soil agent of the present invention is simple, and controllability is strong, is beneficial to suitability for industrialized production.
Part is embodied by explanation below by other advantage of the present invention, target and feature, part also will by research and practice of the present invention by those skilled in the art is understood.
Embodiment
Below in conjunction with embodiment, the present invention is described in further detail, can implement according to this with reference to specification sheets word to make those skilled in the art.
Should be appreciated that used hereinly such as " to have ", other element one or more do not allotted in " comprising " and " comprising " term or the existence of its combination or interpolation.
< example 1>
For being laid on a preparation method for the anti-accumulation of salt in the surface soil agent of laterite stone material on the ground, it comprises the following steps:
Step one: the vinyltriethoxysilane of the methacrylic acid of the trifluoroethyl methacrylate of 35 weight parts, 5 weight parts, 9 weight parts, the poly-dodecyl trimethyl silane of 5 weight parts are joined in the butylacetate of 33 weight parts, be warming up to 50 DEG C, stir 20min, obtain reaction solution;
Step 2: the methacrylic sulfonic acids sodium of 1.5 weight parts and the benzoyl peroxide of 1.5 weight parts are joined in the butylacetate of 10 weight parts, is warming up to 60 DEG C and stirs 15min, obtain activation solution;
Step 3: described reaction solution to be heated up and constant at 70 DEG C of temperature, then by described activation solution gradually stream add in described reaction solution, it is 10h that described stream adds the time, obtains anti-accumulation of salt in the surface soil agent;
Wherein, the operation of described step one, step 2 and step 3 is all carried out under nitrogen protection.
The anti-accumulation of salt in the surface soil dilution agent finally step 3 obtained become weight fraction be 2% solution, then stone surface is spread evenly across, be coated with 3 times altogether, the timed interval of each coating is 1h, the transformation efficiency of wherein said anti-accumulation of salt in the surface soil agent preparation method is 98%, described anti-accumulation of salt in the surface soil agent to the protection effect of stone material in table 1.
< example 2>
For being laid on a preparation method for the anti-accumulation of salt in the surface soil agent of laterite stone material on the ground, it comprises the following steps:
Step one: the vinyltriethoxysilane of the methacrylic acid of the trifluoroethyl methacrylate of 40 weight parts, 8 weight parts, 6 weight parts, the poly-dodecyl trimethyl silane of 2 weight parts are joined in the butylacetate of 40 weight parts, be warming up to 55 DEG C, stir 40min, obtain reaction solution;
Step 2: joined in the butylacetate of 2.5 weight parts by the lauroyl peroxide of the lauryl mercaptan of 1 weight part and 0.5 weight part, is warming up to 60 DEG C and stirs 15min, obtain activation solution;
Step 3: described reaction solution to be heated up and constant at 75 DEG C of temperature, then by described activation solution gradually stream add in described reaction solution, it is 12h that described stream adds the time, obtains anti-accumulation of salt in the surface soil agent;
Wherein, the operation of described step one, step 2 and step 3 is all carried out under nitrogen protection.
The anti-accumulation of salt in the surface soil dilution agent finally step 3 obtained become weight fraction be 3% solution, then stone surface is spread evenly across, be coated with 4 times altogether, the timed interval of each coating is 3h, the transformation efficiency of wherein said anti-accumulation of salt in the surface soil agent preparation method is 97%, described anti-accumulation of salt in the surface soil agent to the protection effect of stone material in table 1.
< example 3>
For being laid on a preparation method for the anti-accumulation of salt in the surface soil agent of laterite stone material on the ground, it comprises the following steps:
Step one: the vinyltriethoxysilane of the methacrylic acid of the trifluoroethyl methacrylate of 30 weight parts, 10 weight parts, 10 weight parts, the poly-dodecyl trimethyl silane of 5 weight parts are joined in the butylacetate of 40 weight parts, be warming up to 60 DEG C, stir 30min, obtain reaction solution;
Step 2: the 3-thiohydracrylic acid of 0.5 weight part and the cyclohexanone peroxide of 1 weight part are joined in the butylacetate of 3.5 weight parts, is warming up to 50 DEG C and stirs 25min, obtain activation solution;
Step 3: described reaction solution to be heated up and constant at 80 DEG C of temperature, then by described activation solution gradually stream add in described reaction solution, it is 15h that described stream adds the time, obtains anti-accumulation of salt in the surface soil agent;
Wherein, the operation of described step one, step 2 and step 3 is all carried out under nitrogen protection.
The anti-accumulation of salt in the surface soil dilution agent finally step 3 obtained become weight fraction be 5% solution, then stone surface is spread evenly across, be coated with 3 times altogether, the timed interval of each coating is 2h, the transformation efficiency of wherein said anti-accumulation of salt in the surface soil agent preparation method is 97%, described anti-accumulation of salt in the surface soil agent to the protection effect of stone material in table 1.
< example 4>
For being laid on a preparation method for the anti-accumulation of salt in the surface soil agent of laterite stone material on the ground, it comprises the following steps:
Step one: the vinyltriethoxysilane of the methacrylic acid of the trifluoroethyl methacrylate of 40 weight parts, 10 weight parts, 10 weight parts, the poly-dodecyl trimethyl silane of 5 weight parts are joined in the butylacetate of 22 weight parts, be warming up to 57 DEG C, stir 37min, obtain reaction solution;
Step 2: joined in the butylacetate of 10 weight parts by the azo diisopropyl nitrile of the Virahol of 1.5 weight parts and 1.5 weight parts, is warming up to 43 DEG C and stirs 20min, obtain activation solution;
Step 3: described reaction solution to be heated up and constant at 74 DEG C of temperature, then by described activation solution gradually stream add in described reaction solution, it is 13h that described stream adds the time, obtains anti-accumulation of salt in the surface soil agent;
Wherein, the operation of described step one, step 2 and step 3 is all carried out under nitrogen protection.
The anti-accumulation of salt in the surface soil dilution agent finally step 3 obtained become weight fraction be 4% solution, then stone surface is spread evenly across, be coated with 4 times altogether, the timed interval of each coating is 1.5h, the transformation efficiency of wherein said anti-accumulation of salt in the surface soil agent preparation method is 96%, described anti-accumulation of salt in the surface soil agent to the protection effect of stone material in table 1.
< example 5>
For being laid on a preparation method for the anti-accumulation of salt in the surface soil agent of laterite stone material on the ground, it comprises the following steps:
Step one: the vinyltriethoxysilane of the methacrylic acid of the trifluoroethyl methacrylate of 38 weight parts, 7 weight parts, 7 weight parts, the poly-dodecyl trimethyl silane of 4 weight parts are joined in the butylacetate of 35 weight parts, be warming up to 51 DEG C, stir 24min, obtain reaction solution;
Step 2: the 3-thiohydracrylic acid of 0.8 weight part and the di-isopropyl peroxydicarbonate of 1.2 weight parts are joined in the butylacetate of 7 weight parts, is warming up to 55 DEG C and stirs 25min, obtain activation solution;
Step 3: described reaction solution to be heated up and constant at 74 DEG C of temperature, then by described activation solution gradually stream add in described reaction solution, it is 11h that described stream adds the time, obtains anti-accumulation of salt in the surface soil agent;
Wherein, the operation of described step one, step 2 and step 3 is all carried out under nitrogen protection.
The anti-accumulation of salt in the surface soil dilution agent finally step 3 obtained become weight fraction be 2.5% solution, then stone surface is spread evenly across, be coated with 3 times altogether, the timed interval of each coating is 2.5h, the transformation efficiency of wherein said anti-accumulation of salt in the surface soil agent preparation method is 98%, described anti-accumulation of salt in the surface soil agent to the protection effect of stone material in table 1.
In order to effect of the present invention is described, contriver provides comparative experiments as follows:
< comparative example 1>
In step, only trifluoroethyl methacrylate and methacrylic acid are joined in butylacetate, identical with example 2 of all the other parameters, technological process is also identical, the transformation efficiency of wherein said anti-accumulation of salt in the surface soil agent preparation method is 95%, the anti-accumulation of salt in the surface soil agent finally obtained to the protection effect of stone material in table 1.
< comparative example 2>
In step, only trifluoroethyl methacrylate, methacrylic acid and vinyltriethoxysilane are joined in butylacetate, identical with example 2 of all the other parameters, technological process is also identical, the transformation efficiency of wherein said anti-accumulation of salt in the surface soil agent preparation method is 97%, the anti-accumulation of salt in the surface soil agent finally obtained to the protection effect of stone material in table 1.
< comparative example 3>
In step 3, add in described reaction solution by disposable for described activation solution, reaction times is 15h, obtain anti-accumulation of salt in the surface soil agent, identical with example 3 of all the other parameters, technological process is also identical, and the transformation efficiency of wherein said anti-accumulation of salt in the surface soil agent preparation method is 81%, the anti-accumulation of salt in the surface soil agent finally obtained to the protection effect of stone material in table 1.
< comparative example 4>
In step 2, the add-on of chain-transfer agent Virahol is 5 weight parts, identical with example 4 of all the other parameters, and technological process is also identical, the transformation efficiency of wherein said anti-accumulation of salt in the surface soil agent preparation method is 94%, the anti-accumulation of salt in the surface soil agent finally obtained to the protection effect of stone material in table 1.
< comparative example 5>
The anti-accumulation of salt in the surface soil dilution agent finally step 3 obtained become weight fraction be 8% solution, then stone surface is spread evenly across, identical with example 5 of all the other parameters, technological process is also identical, the anti-accumulation of salt in the surface soil agent finally obtained to the protection effect of stone material in table 1.
Respectively by following method, the protection effect of the product obtained in example and comparative example to stone material is verified:
The mensuration of waterproof rate, acidproof rate and resistance to alkali content: by the stone material that processed respectively at the H of distilled water, 1% (V/V)
2sO
4, soak 48h in saturated aqua calcis, measure the water-intake rate of stone material;
Contaminated resistance is tested: the pollutents such as cola, blue-black ink, tea are respectively got one respectively, drops in stone sample surface respectively, wipe dirt after 24h, observes the change of stone surface, and contrasts with blank sample, judge the stain resistant grade of stone material;
As shown in table 1 to the measurement result of the didirtresistance of stone material, water-repellancy, acid resistance and alkali resistance after process according to the method described above.
The barrier propterty of the stone material of table 1 after anti-accumulation of salt in the surface soil agent process
| Resistance to soiling | Waterproof rate (%) | Acidproof rate (%) | Resistance to alkali content (%) | |
| Example 1 | Stone surface is pollution-free | 78.5 | 74.3 | 80.3 |
| Example 2 | Stone surface is pollution-free | 79.1 | 75.1 | 79.1 |
| Example 3 | Stone surface is pollution-free | 78.4 | 75.3 | 80.2 |
| Example 4 | Stone surface is pollution-free | 78.5 | 73.9 | 78.3 |
| Example 5 | Stone surface is pollution-free | 79.0 | 74.4 | 78.6 |
| Comparative example 1 | Stone surface pollution in wide area | 53.4 | 41.8 | 57.7 |
| Comparative example 2 | Stone surface small area pollutes | 56.9 | 48.2 | 59.4 |
| Comparative example 3 | Stone surface small area pollutes | 58.2 | 56.0 | 56.4 |
| Comparative example 4 | Stone surface small area pollutes | 63.1 | 58.3 | 60.3 |
| Comparative example 5 | Stone surface small area pollutes | 61.7 | 54.5 | 62.6 |
Can find out from upper table 1, comparative example 1, compared with example, adds the cohesive force that can improve between multipolymer and stone material due to vinyltriethoxysilane and poly-dodecyl trimethyl silane, thus can improve the water-proof stain-resistant performance of stone material;
Comparative example 2 is compared with example, and adding of poly-dodecyl trimethyl silane can further improve anti-accumulation of salt in the surface soil agent to the barrier propterty of stone material;
Comparative example 3 is compared with example, by chain-transfer agent and initiator progressively stream add in reaction solution, effectively can improve the transformation efficiency of anti-accumulation of salt in the surface soil agent preparation technology, and can the Effective Regulation molecular size range of multipolymer, the molecular weight of copolymer obtained is more single, improves the water-proof stain-resistant performance of anti-accumulation of salt in the surface soil agent;
Comparative example 4 is compared with example, and the add-on of chain-transfer agent is too high, causes molecular weight of copolymer on the low side, thus have impact on its hydrophobic oleophobic performance;
Comparative example 5 is compared with example, and the excessive concentration of anti-accumulation of salt in the surface soil agent after dilution, causes viscosity excessive, not easily permeate in stone material, and crawling is even, thus also have impact on anti-accumulation of salt in the surface soil agent to the barrier propterty of stone material.
Visible, the quaternary fluorinated copolymer that trifluoroethyl methacrylate, methacrylic acid, vinyltriethoxysilane and poly-dodecyl trimethyl silane are formed, have lower surface free energy, water-proof stain-resistant performance is high, and strong with stone material bonding force, for a long time effectively can protect stone material;
In addition, by by chain-transfer agent and initiator progressively stream add in reaction solution, the Effective Regulation molecular size range of multipolymer, the molecular weight of copolymer obtained is more single, and transformation efficiency is significantly improved;
In addition, rational anti-accumulation of salt in the surface soil dilution agent concentration and coating method, both ensure that the good waterproof antifouling effect of anti-accumulation of salt in the surface soil agent, in turn ensure that the air permeable effect of stone material, prevents the reduction in the stone material inner work-ing life caused because moisture accumulates;
In addition, the preparation method of anti-accumulation of salt in the surface soil agent of the present invention is simple, and controllability is strong, is beneficial to suitability for industrialized production.
Although embodiment of the present invention are open as above, it is not restricted to listed in specification sheets and embodiment utilization.It can be applied to various applicable the field of the invention completely.For those skilled in the art, can easily realize other amendment.Therefore do not deviating under the universal that claim and equivalency range limit, the present invention is not limited to specific details and illustrates here and the embodiment described.
Claims (7)
1., for being laid on a preparation method for the anti-accumulation of salt in the surface soil agent of laterite stone material on the ground, it is characterized in that, comprise the following steps:
Step one: the vinyltriethoxysilane of the methacrylic acid of the trifluoroethyl methacrylate of 30 ~ 40 weight parts, 5 ~ 10 weight parts, 5 ~ 10 weight parts, the poly-dodecyl trimethyl silane of 1 ~ 5 weight part are joined in the butylacetate of 20 ~ 40 weight parts, be warming up to 50 ~ 60 DEG C, stir 20 ~ 40min, obtain reaction solution;
Step 2: joined in the butylacetate of 1 ~ 10 weight part by the initiator of the chain-transfer agent of 0.5 ~ 1.5 weight part and 0.5 ~ 1.5 weight part, is warming up to 40 ~ 60 DEG C and stirs 15 ~ 30min, obtain activation solution;
Step 3: described reaction solution to be heated up and constant at 70 ~ 80 DEG C of temperature, then by described activation solution gradually stream add in described reaction solution, it is 10 ~ 15h that described stream adds the time, obtains anti-accumulation of salt in the surface soil agent;
Step 4: the anti-accumulation of salt in the surface soil dilution agent that step 3 is obtained become weight fraction be 2 ~ 5% solution, be then spread evenly across stone surface.
2., as claimed in claim 1 for being laid on the preparation method of the anti-accumulation of salt in the surface soil agent of laterite stone material on the ground, the operation of described step one, step 2 and step 3 is carried out all under nitrogen protection.
3., as claimed in claim 1 for being laid on the preparation method of the anti-accumulation of salt in the surface soil agent of laterite stone material on the ground, the add-on of described chain-transfer agent is 0.5 ~ 1 weight part, and the add-on of described initiator is 0.8 ~ 1.2 weight part.
4., as claimed in claim 1 for being laid on the preparation method of the anti-accumulation of salt in the surface soil agent of laterite stone material on the ground, described chain-transfer agent is selected from any one or two or more materials in methacrylic sulfonic acids sodium, lauryl mercaptan, dithioesters, 3-thiohydracrylic acid, Virahol.
5. as claimed in claim 1 for being laid on the preparation method of the anti-accumulation of salt in the surface soil agent of laterite stone material on the ground, described initiator be selected from benzoyl peroxide, lauroyl peroxide, cyclohexanone peroxide, di-isopropyl peroxydicarbonate, azo diisopropyl nitrile, 2,2'-Azobis(2,4-dimethylvaleronitrile) any one.
6., as claimed in claim 1 for being laid on the preparation method of the anti-accumulation of salt in the surface soil agent of laterite stone material on the ground, in described step 4, the number of times of anti-accumulation of salt in the surface soil agent coating is 2 ~ 5 times.
7., as claimed in claim 6 for being laid on the preparation method of the anti-accumulation of salt in the surface soil agent of laterite stone material on the ground, the timed interval of described coating is 1 ~ 3h.
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| CN103923561A (en) * | 2013-01-10 | 2014-07-16 | 厦门诺恩斯科技有限公司 | Organosilicon concrete protective agent and preparation method |
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