Replaceable natural polysaccharide coating for construction field and preparation method thereof

A polysaccharide and coating technology, applied in the field of replaceable natural polysaccharide coating and its preparation, to achieve the effect of easy degradation and enhanced water resistance

Active Publication Date: 2018-08-10
HUAZHONG NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide an environmentally friendly replaceable natural polysaccharide coating and its preparation method in view of the shortcomings of the above-mentioned prior art in terms of replaceability and environmental protection. It is stable and beautiful at room temperature, and the coating can pass high temperature Or warm water to remove, to achieve rapid replacement of the coating, does not contain any synthetic emulsion, under certain conditions, can be completely degraded

Method used

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  • Replaceable natural polysaccharide coating for construction field and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] The polysaccharide coating can be replaced, and the amount of each raw material is calculated by mass percentage: 40 wt% of a 6% nano-silica modified PEG aqueous solution, 20 wt% of a locust bean gum and xanthan gum solution with a mass fraction of 2%, and a surfactant Sodium hexametaphosphate 0.2wt%, bactericide 0.01wt%, thickener hydroxypropyl methylcellulose 0.3%, antifreeze 0.01wt%, defoamer 0.15wt%, filler 15%, the balance of water, and The sum of the contents of each component is 100%.

[0038] The preparation method of the above-mentioned replaceable polysaccharide coating, the specific steps are as follows:

[0039] 1) Dissolve 6g of PEG (molecular weight: 600) in 100ml of water at 90°C to make a 6% PEG aqueous solution;

[0040] 2) Weigh 2g of CaO, first digest CaO with a small amount of water (the molar ratio of water to CaO is 1:1), then add 4g of nano-silica, 0.02g of silane coupling agent KH570, and 0.01g of dodecylsulfonic acid Sodium, 0.02g of antifoami...

Embodiment 2

[0044] The polysaccharide coating can be replaced, and the amount of each raw material is calculated by mass percentage: 40wt% of a PEG aqueous solution with a mass fraction of 6% nanometer calcium carbonate, 20wt% of a locust bean gum and xanthan gum solution with a mass fraction of 2%, and a surfactant of 0.2 % by weight, 0.01% by weight of bactericide, 0.3% by weight of thickener, 0.01% by weight of antifreeze, 0.15% by weight of defoamer, 15% by weight of filler, the balance of water, and the sum of the contents of each component is 100%.

[0045] The preparation method of the above-mentioned replaceable polysaccharide coating, the specific steps are as follows:

[0046] 1) Dissolve 6g of PEG (molecular weight: 600) in 100ml of water at 90°C to prepare a 6% PEG aqueous solution.

[0047] 2) Weigh 2g CaO, first digest CaO with a small amount of water, then add 3g nano-calcium carbonate, 0.02g silane coupling agent KH560, 0.01g sodium dodecylsulfonate, 0.02g defoamer C18 Al...

Embodiment 3

[0051] The polysaccharide coating can be replaced, and the amount of each raw material is calculated by mass percentage: 50 wt% of 6% boric acid cross-linked PVA solution by mass fraction, 10 wt% of xanthan gum solution with 2% mass fraction, 0.2 wt% of surfactant, and 0.01 wt% of bactericide wt%, 0.3% thickener, 0.01wt% antifreeze, 0.15wt% defoamer, 15% filler, the rest of water, and the sum of the contents of each component is 100%.

[0052] The preparation method of the above-mentioned replaceable polysaccharide coating, the specific steps are as follows:

[0053] 1) Dissolve 6g of PVA in 100ml of water at 90°C to make a 6% PVA aqueous solution;

[0054] 2) Add a boric acid solution with a concentration of 5% to the aqueous solution obtained in step 1), in an amount of 1% of the PVA content, heat to 65° C., react for 3 hours, and cool to obtain a boric acid crosslinked PVA solution;

[0055] 3) Dissolve 2g xanthan gum in 100ml water at 90°C to form a 2% polysaccharide aque...

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Abstract

The invention discloses replaceable natural polysaccharide coating for a construction field. The environment-friendly type natural polysaccharide coating takes polysaccharide and a modified waterbornepolymer as a binding agent, and further comprises filler, an auxiliary agent and water; the replaceable natural polysaccharide coating is qualified coating for internal and external walls under conventional external conditions and under certain temperature and pressure. The natural polysaccharide coating disclosed by the invention takes a natural high molecular material polysaccharide and a modified waterborne polymer as the binding agent, does not contain any synthetic emulsion and can be completely degraded under certain conditions; in a film forming process, no organic solvents are volatilized and the requirements of no damages to human bodies are met, so that the replaceable natural polysaccharide coating is real environment-friendly coating. The natural polysaccharide coating is stable and beautiful at room temperature and is easy to crush and spray; a coating layer can be removed through pressure and warm water and rapid replacement of the coating layer is realized.

Description

technical field [0001] The invention belongs to the application field of architectural coatings and natural polymer materials, and in particular relates to a replaceable natural polysaccharide coating and a preparation method thereof. Background technique [0002] With the rapid development of society and science and technology, and the continuous improvement of living standards, human beings have higher and higher requirements for the environmental protection of coating materials. Solvent-containing (oil-based) coatings are gradually being replaced by water-based architectural coatings. Water-based architectural coatings are a type of architectural coatings produced by classifying liquid architectural coatings according to the types of dispersion media. This type of coating uses water as the dispersion medium and is the most important category of new coating technologies (ie, water-based coatings, high-solid coatings, solvent-free coatings, powder coatings, and radiation-cu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D171/02C09D105/00C09D129/04C09D133/04C09D7/61C09D7/63
CPCC08K2003/265C08K2003/387C08K2201/011C08L2201/06C08L2205/025C08L2205/035C09D7/61C09D7/63C09D129/04C09D133/04C09D171/02C08L5/00C08K3/36C08K3/26C08K3/38C08K5/5435C08K5/544
Inventor 暴峰张媛媛简丹严凡李医疗
Owner HUAZHONG NORMAL UNIV
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