ttk titanium dioxide factories



Pure PVB is non-toxic and harmless to human body. In addition, ethyl acetate or alcohol can be used as solvent, so PVB is widely used in printing ink of food containers and plastic packaging in European and American countries.

Storage safety properties

PVB can be stored for two years without affecting its quality as long as it is not in direct contact with water; PVB shall be stored in a dry and cool place and avoid direct sunlight. Heavy pressure shall be avoided during PVB storage.

Solubility

PVB is soluble in alcohol, ketone, ester and other solvents. The solubility of various solvents changes according to the functional group composition of PVB itself. Generally speaking, alcohol solvents are soluble, but methanol is more insoluble for those with high acetal groups; The higher the acetal group, the easier it is to dissolve in ketone solvents and ester solvents;

PVB is easily soluble in cellosolve solvents; PVB is only partially dissolved in aromatic solvents such as xylene and toluene; PVB is insoluble in hydrocarbon solvents.

Viscosity characteristics of PVB solution

The viscosity of PVB solution is greatly affected by the formula of solvent and the type of solvent; Generally speaking, if alcohol is used as solvent, the higher the molecular weight of alcohol, the higher the viscosity of PVB solution;

Aromatic solvents such as xylene and toluene and hydrocarbon solvents can be used as diluents to reduce the viscosity of PVB solution; The effect of PVB chemical composition on viscosity is summarized as follows: under the same solvent and the same content of each base, the higher the degree of polymerization, the higher the solution viscosity; Under the same solvent and the same degree of polymerization, the higher the acetal group or acetate group, the lower the solution viscosity.

Dissolution method of PVB

Where mixed solvents are used, the dissolution step is to first put aromatic solvents (such as xylene, toluene, etc.) or ester solvents (such as n-butyl acetate, ethyl acetate, etc.) into the mixing, slowly put PVB into the mixing, and then add alcohol solvents (such as n-butanol, ethanol, etc.) after PVB is dispersed and expanded,

At this time, the dissolution time can be shortened by heating; Using this dissolution method, the formation of lumpy PVB can be avoided (because the dissolution time will be several times after the formation of lumpy PVB), so the dissolution speed can be accelerated. Generally, the ratio of aromatic and alcohol solvents is 60 / 40 ~ 40 / 60 (weight ratio), and PVB solution with low viscosity can be prepared.

The solvent composition contains 2 ~ 3wt% water, which can improve the hydrogen bonding strength of alcohol solvents and help the solubility of PVB.

Processing properties

Although PVB resin is a thermoplastic, it has little processability before plasticizer is added. Once plasticizer is added, its processability is very easy.

The purpose of general coatings and adhesives is to change the resin characteristics by adding plasticizers to meet the application requirements, such as film softness, reducing the TG point of the resin, reducing the heat sealing temperature, maintaining low-temperature softness, etc.

Compatibility

PVB can be compatible with a variety of resins, such as phenolic resin, epoxy resin, alkyd resin and 
MELAMINE resin.

B-08sy, b-06sy and b-05sy with high acetal degree can be mixed with nitrocellulose in any proportion. PVB and alkyd resin are partially compatible. General PVB is compatible with low molecular weight epoxy resin, while high molecular weight epoxy resin needs PVB with high acetal degree to be compatible with each other.

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The photocatalytic properties of titanium dioxide are particularly interesting. When exposed to ultraviolet radiation, TiO2 can catalyze reactions that decompose organic compounds, leading to its use in self-cleaning surfaces and air purification systems When exposed to ultraviolet radiation, TiO2 can catalyze reactions that decompose organic compounds, leading to its use in self-cleaning surfaces and air purification systems When exposed to ultraviolet radiation, TiO2 can catalyze reactions that decompose organic compounds, leading to its use in self-cleaning surfaces and air purification systems When exposed to ultraviolet radiation, TiO2 can catalyze reactions that decompose organic compounds, leading to its use in self-cleaning surfaces and air purification systemschemical titanium dioxide. This property is utilized in construction materials like concrete and glass, where the titanium dioxide helps to break down pollutants and reduce maintenance requirements.

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Titanium Dioxide (TiO2), a naturally occurring oxide of titanium, exists in two primary crystalline forms - Anatase and Rutile. Among these, Rutile TiO2, with its superior whiteness and high refractive index, has garnered significant attention in the coating sector. Its exceptional good whiteness imparts a brilliant, clean appearance to coatings, making it an indispensable ingredient in various applications such as architectural coatings, plastics, paper, and even food.

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Titanium dioxide (TiO2) is a widely used white pigment with excellent properties such as high brightness, weather resistance, and non-toxicity. It is commonly found in paints, plastics, and coatings due to its ability to provide a pure white color while also offering protection against ultraviolet radiation. However, the production of TiO2 can be a complex and energy-intensive process. One of the key steps in this process is the precipitation of titanium dioxide from a solution. In this article, we will delve into the various aspects of titanium dioxide precipitation and provide a comprehensive guide for understanding this critical process.

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