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Modified inorganic lithium silicate binder, and preparation method and use thereof

A lithium silicate and binder technology, which is applied in the direction of inorganic binders, adhesives, polymer binder additives, etc., can solve the problems of poor water resistance of coatings, difficult applicability, and fragile polymers, etc., to achieve Fast film forming speed, simple equipment, and less air pollution

Inactive Publication Date: 2013-09-18
JIUQING PAINT SHANGHAI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, because the coating film formed by sodium silicate or potassium silicate on the surface of the object will gradually dissolve when it meets water after drying, that is, it is reversible to water, so the water resistance of sodium silicate and potassium silicate coatings cured by dehydration is not good; on the contrary , only lithium silicate film is insoluble in water, but due to the extremely small radius of lithium ions and high stability, if it is mixed with polymers alone, the polymers will be fragile, and there are certain difficulties in applicability

Method used

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  • Modified inorganic lithium silicate binder, and preparation method and use thereof
  • Modified inorganic lithium silicate binder, and preparation method and use thereof
  • Modified inorganic lithium silicate binder, and preparation method and use thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] a. Lithium silicate

[0047]

[0048] b. Modified inorganic lithium silicate binder

[0049]

[0050] Preparation:

[0051] The first step: the preparation of lithium silicate:

[0052] Put the deionized water in the stirred tank, add lithium hydroxide and stabilizer under the stirring condition of 80-90rpm, stir for 10-15min, then quickly add the silica sol under the high-speed stirring of 900-1400rpm, and the reaction temperature is 40-45 ℃, after high-speed dispersion for 5 hours, stop stirring and react in a static state for 96-120 hours, it is transparent and ready for use;

[0053] The second step: the preparation of lithium silicate binder:

[0054] Add the silica sol in the binder into the stirring tank, add lithium silicate, modified adhesive, tackifier, defoamer and preservative under the stirring condition of 80-90rpm, and stir at room temperature for 30-60min , the sampling test pH value is 11, and filtering to obtain a modified inorganic lithium s...

Embodiment 2

[0056] a. Lithium silicate

[0057]

[0058]b. Modified inorganic lithium silicate binder

[0059]

[0060] Preparation:

[0061] The first step: the preparation of lithium silicate:

[0062] Put the deionized water in the stirred tank, add lithium hydroxide and stabilizer under the stirring condition of 80-90rpm, stir for 10-15min, then quickly add the silica sol under the high-speed stirring of 900-1400rpm, and the reaction temperature is 40-45 ℃, after high-speed dispersion for 5 hours, stop stirring and react in a static state for 96-120 hours, then use;

[0063] The second step: the preparation of lithium silicate binder:

[0064] Add the silica sol in the binder into the stirring tank, add lithium silicate, modified adhesive, tackifier, defoamer and preservative under the stirring condition of 80-90rpm, and stir at room temperature for 30-60min , the sampling test pH value is 11, and filtering to obtain a modified inorganic lithium silicate binder.

Embodiment 3

[0066] a. Lithium silicate

[0067]

[0068] b. Modified inorganic lithium silicate binder

[0069]

[0070] Preparation:

[0071] The first step: the preparation of lithium silicate:

[0072] Put the deionized water in the stirred tank, add lithium hydroxide and stabilizer under the stirring condition of 80-90rpm, stir for 10-15min, then quickly add the silica sol under the high-speed stirring of 900-1400rpm, and the reaction temperature is 40-45 ℃, after high-speed dispersion for 5 hours, stop stirring and react in a static state for 96-120 hours, then use;

[0073] The second step: the preparation of lithium silicate binder:

[0074] Add the silica sol in the binder into the stirring tank, add lithium silicate, modified adhesive, tackifier, defoamer and preservative under the stirring condition of 80-90rpm, and stir at room temperature for 30-60min , the sampling test pH value is 11, and filtering to obtain a modified inorganic lithium silicate binder.

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Abstract

The invention relates to a modified inorganic lithium silicate binder, and in particular relates to a water-based binder containing lithium silicate, silica soil and auxiliaries. More specifically, the modified inorganic lithium silicate binder comprises 10-25 parts of lithium silicate, 60-75 parts of silica soil and 10-15 parts of modified binder and 0.6-3 parts of auxiliaries, wherein the lithium silicate is prepared from 3-10 parts of de-ionized water, 0.5-1.5 parts of lithium hydrate, 5-12 parts of silica soil and 1-2 parts of stabilizer through a reaction; the modified binder is organic fluorine and / or an organic silicon modified acrylic emulsion. The binder provided by the invention is environment-friendly and free of pollution; the content of SiO2 of the modified inorganic lithium silicate binder does not exceed 20%; and the binder is low in viscosity, short in drying time; as a result, the formed dry film is insoluble in water, and excellent in bonding strength, flexibility and impact resistance; the binder is used for preparing an anticorrosion water-based inorganic zinc rich paint, and the combination properties of the paint film are improved; especially, the paint film is excellent in corrosion resistance, high in bonding strength, tough and wear resistant, and also excellent in crazing resistance, oil resistance, organic solvent resistance, weather fastness and high / low temperature resistance; the paint film has the welding performance with paint and has a function of protecting steel structures against corrosion for a long time.

Description

technical field [0001] The invention relates to the field of binders, and relates to a water-based inorganic lithium silicate binder, in particular to a modified inorganic lithium silicate binder and a preparation method thereof. The binder can be used to prepare water-based coatings. Background technique [0002] Water-soluble silicate is composed of lithium, sodium, potassium and other alkali metals or quaternary ammonium ions in different proportions with silica sol and water. Due to its wide range of uses, it has been paid more and more attention by people, and can be effectively used in metal anti-corrosion, Refractory materials, ceramic glass products and textiles and other fields. Among them, because the coating film formed by sodium silicate or potassium silicate on the surface of the object will gradually dissolve when it meets water after drying, that is, it is reversible to water, so the water resistance of sodium silicate and potassium silicate coatings cured by ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J1/02C09J11/08C09D1/00C09D5/08C09D7/12
Inventor 马保萍陈安仁席志宏史瑞瑾
Owner JIUQING PAINT SHANGHAI
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