A kind of freeze-dried adhesive transparent coating for protection of masonry cultural relics and preparation method thereof

Abstract

The invention discloses a freeze-dried glue transparent coating for the protection of brick / stone historical relics and a preparation method thereof. The coating, based on the total amount thereof, comprises the following compositions in percentage by mass: 10-40% of freeze-dried colloidal powder dispersion, 20-40% of a film-forming material, 0.01-0.03% of a flatting agent, 0.01-0.05% of a wetting agent, 0.1-0.5% of a defoaming agent, and the balance of water. The coating disclosed by the invention has good compatibility with brick / stone historical relics, does not affect the studies and views on historical relics; the coating both can prevent rainwater from permeating in historical relics, and enables vapor to be released when historical relics are exposed to the weather, thereby adjusting the internal humidity of stone materials; and the costing can prevent stress ruptures caused by temperature shock, and keep the long-term self-cleaning function of brick / stone historical relics. Moreover, the coating has inherent noninflammability, corrosion resistance, high hardness, and the like, widens the application scope of freeze-dried glue, and can satisfy the technical requirements of the fields such as the protection of brick / stone historical relics, the repair of ancient and old architecture, and the care of decorative stones, and the like.

Description

[0001] Technical field:

[0002] The invention relates to the technical field of protection of cultural relics, in particular to a freeze-dried adhesive transparent coating for protection of masonry cultural relics and a preparation method thereof.

[0003] Background technique:

[0004] Masonry cultural relics have experienced vicissitudes in the long-term historical changes, especially most of the masonry cultural relics directly exposed to the natural environment, due to the structural characteristics of the masonry itself and various external factors, there have been varying degrees of looseness, cracks, Weathering and corrosion phenomena such as spalling and sandification. Environmental pollution caused by the development of modern industrialization, such as sulfur dioxide (SO 2 ), nitrogen oxides (NO x ) and other acidic and harmful gases, the acid rain and acid fog formed have accelerated the erosion of these precious cultural relics. In addition, the sudden change of...

Examples

Embodiment 1

[0033] (1) Preparation of lyophilized gel powder dispersion: add SiO in the container 2 The lyophilized rubber powder is ultrasonically dispersed in water, and then a silane coupling agent is added to obtain a lyophilized rubber powder dispersion by grinding; , 20% silane coupling agent, the rest is water;

[0034] (2) Preparation of lyophilized adhesive transparent coating: the lyophilized adhesive powder dispersion obtained in step (1) is mixed with film-forming material silica sol, leveling agent polyether modified polydimethylsiloxane, and wetting agent The polyether modified organosilicon compound and the defoamer n-butanol are fully mixed and stirred evenly to obtain the target product; wherein, the dosage of each component is proportioned as follows according to mass percentage: freeze-dried rubber powder dispersion: 10%, film-forming Substance silica sol: 20%, leveling agent polyether modified polydimethylsiloxane: 0.01%, wetting agent polyether modified organosilicon...

Embodiment 2

[0037] (1) Preparation of freeze-dried rubber powder dispersion: add freeze-dried rubber powder in the container, ultrasonically disperse in water, then add titanate coupling agent, and obtain the freeze-dried rubber powder dispersion by grinding; The dosage of each component is proportioned as follows according to mass percentage: 10% lyophilized gel powder, 5% titanate coupling agent, and the rest is water; the composition ratio of the lyophilized gel powder is: SiO 2 Lyophilized gel: 5%; TiO 2 Freeze-dried gel: 5%.

[0038] (2) Preparation of lyophilized adhesive transparent coating: the lyophilized adhesive powder dispersion liquid obtained in step (1) and film-forming material aluminosilicate, leveling agent polyether modified polydimethylsiloxane, moistening agent The wet agent polyether modified organosilicon compound and the defoamer n-butanol are fully mixed and stirred evenly to obtain the target product; wherein, the dosage of each component is proportioned as foll...

Embodiment 3

[0041] (1) Preparation of freeze-dried rubber powder dispersion: add freeze-dried rubber powder in the container, ultrasonically disperse in water, then add silane coupling agent, adopt the method of grinding to obtain freeze-dried rubber powder dispersion; The dosage is as follows according to mass percentage: 25% lyophilized gel powder, 10% silane coupling agent, and the rest is water; the composition ratio of the lyophilized gel powder is: SiO 2 Freeze-dried gel: 15%; TiO 2 Freeze-dried gel: 5%; ZnO freeze-dried gel: 3%; Al 2 o 3 Lyophilized gel: 2%.

[0042](2) Preparation of freeze-dried glue transparent coating: the freeze-dried glue powder dispersion liquid obtained in step (1) and film-forming substance phosphate, leveling agent polyether modified polydimethylsiloxane, wetting agent The polyether-modified organosilicon compound and the defoamer n-butanol are fully mixed and stirred evenly to obtain the target product; wherein, the dosage of each component is proport...

[0001] Technical field:

[0002] The invention relates to the technical field of protection of cultural relics, in particular to a freeze-dried adhesive transparent coating for protection of masonry cultural relics and a preparation method thereof.

[0003] Background technique:

[0004] Masonry cultural relics have experienced vicissitudes in the long-term historical changes, especially most of the masonry cultural relics directly exposed to the natural environment, due to the structural characteristics of the masonry itself and various external factors, there have been varying degrees of looseness, cracks, Weathering and corrosion phenomena such as spalling and sandification. Environmental pollution caused by the development of modern industrialization, such as sulfur dioxide (SO 2 ), nitrogen oxides (NO x ) and other acidic and harmful gases, the acid rain and acid fog formed have accelerated the erosion of these precious cultural relics. In addition, the sudden change of...

Examples

Embodiment 1

[0033] (1) Preparation of lyophilized gel powder dispersion: add SiO in the container 2 The lyophilized rubber powder is ultrasonically dispersed in water, and then a silane coupling agent is added to obtain a lyophilized rubber powder dispersion by grinding; , 20% silane coupling agent, the rest is water;

[0034] (2) Preparation of lyophilized adhesive transparent coating: the lyophilized adhesive powder dispersion obtained in step (1) is mixed with film-forming material silica sol, leveling agent polyether modified polydimethylsiloxane, and wetting agent The polyether modified organosilicon compound and the defoamer n-butanol are fully mixed and stirred evenly to obtain the target product; wherein, the dosage of each component is proportioned as follows according to mass percentage: freeze-dried rubber powder dispersion: 10%, film-forming Substance silica sol: 20%, leveling agent polyether modified polydimethylsiloxane: 0.01%, wetting agent polyether modified organosilicon...

Embodiment 2

[0037] (1) Preparation of freeze-dried rubber powder dispersion: add freeze-dried rubber powder in the container, ultrasonically disperse in water, then add titanate coupling agent, and obtain the freeze-dried rubber powder dispersion by grinding; The dosage of each component is proportioned as follows according to mass percentage: 10% lyophilized gel powder, 5% titanate coupling agent, and the rest is water; the composition ratio of the lyophilized gel powder is: SiO 2 Lyophilized gel: 5%; TiO 2 Freeze-dried gel: 5%.

[0038] (2) Preparation of lyophilized adhesive transparent coating: the lyophilized adhesive powder dispersion liquid obtained in step (1) and film-forming material aluminosilicate, leveling agent polyether modified polydimethylsiloxane, moistening agent The wet agent polyether modified organosilicon compound and the defoamer n-butanol are fully mixed and stirred evenly to obtain the target product; wherein, the dosage of each component is proportioned as foll...

Embodiment 3

[0041] (1) Preparation of freeze-dried rubber powder dispersion: add freeze-dried rubber powder in the container, ultrasonically disperse in water, then add silane coupling agent, adopt the method of grinding to obtain freeze-dried rubber powder dispersion; The dosage is as follows according to mass percentage: 25% lyophilized gel powder, 10% silane coupling agent, and the rest is water; the composition ratio of the lyophilized gel powder is: SiO 2 Freeze-dried gel: 15%; TiO 2 Freeze-dried gel: 5%; ZnO freeze-dried gel: 3%; Al 2 o 3 Lyophilized gel: 2%.

[0042](2) Preparation of freeze-dried glue transparent coating: the freeze-dried glue powder dispersion liquid obtained in step (1) and film-forming substance phosphate, leveling agent polyether modified polydimethylsiloxane, wetting agent The polyether-modified organosilicon compound and the defoamer n-butanol are fully mixed and stirred evenly to obtain the target product; wherein, the dosage of each component is proport...

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