rutile titanium dioxide wallpaper, interior wall coatings, ink special purpose rs103 rs106



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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It is naturally opaque and bright, which makes it useful for use in paper, ceramics, rubber, textiles, paints, inks and cosmetics.It is also resistant to ultraviolet (UV) light, and is used widely in sunscreens and pigments that are likely to be exposed to UV light. It is used in a wide variety of personal care products, including color cosmetics such as eye shadow and blush, loose and pressed powders and in sunscreens.

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There are two primary forms of titanium dioxide commercially available: anatase and rutile. The rutile form is typically used in sunscreens due to its superior ability to handle UV rays and stability in the presence of UV light. The anatase form is typically used in other types of products, such as paint. Another plus of the rutile form is that its UVA protection extends past 400 nanometers, which is the upper limit of UVA.

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  • Moreover, the role of stabilisers is crucial in catering to specific dietary needs. For instance, gluten-free products often require stabilisers to mimic textures that gluten would typically provide. Similarly, vegan alternatives frequently incorporate stabilisers to replace ingredients like eggs or dairy, allowing a broader range of consumers to access diverse food options.


  • E450a has a wide range of applications across various food categories. One of its primary uses is in the production of processed meats, such as sausages and deli meats. In these products, it acts as a binding agent, ensuring that the meat remains tender and juicy while preventing separation of fat and water. Additionally, E450a plays a crucial role in baked goods, where it helps improve dough stability and volume. It is also found in dairy products, such as cheese, where it aids in emulsification and prevents separation of oils.


    e450a food additive

    e450a
  • Preservatives play a crucial role in the food industry by extending the shelf life of products and maintaining their safety for consumption. Among the many preservatives used, E234, also known as Nisin, stands out due to its unique properties and applications. Derived from the bacterium Lactococcus lactis, Nisin is a natural preservative that is particularly effective against a wide range of bacteria, making it valuable in various food products.


  • Understanding E233 A Closer Look at the Food Additive


  • Moreover, sodium citrate is widely used as a preservative. Its ability to inhibit the growth of microorganisms contributes to the safety and longevity of food items. By creating an environment that is less favorable for bacteria, sodium citrate helps extend the expiration date of many products, reducing food waste and preserving freshness. This is particularly important in the production of canned goods, beverages, and processed meats.


    sodium citrate food additive

    sodium
  • Understanding Sweeteners A Deep Dive into E950, E951, and E955


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  • Formic Acid A Vital Organic Compound


  • Sodium Benzoate, known by its E number E211, is the sodium salt of benzoic acid. It is primarily used to inhibit the growth of mold, yeast, and some bacteria in acidic foods and beverages. This preservative is particularly effective in environments with a low pH, making it a popular choice for products like carbonated drinks, fruit juices, and pickles.


  • The Addictiveness of Monosodium Glutamate Myth or Reality?


  • In the realm of food preservation, acids play a pivotal role in extending the shelf life of various products. The use of acid as a food preservative is a practice that dates back centuries, demonstrating its effectiveness in inhibiting microbial growth and preventing spoilage. This article explores the types of acids commonly used, their mechanisms of action, and their applications in the food industry.


  • Denatured alcohol is ethanol that has been mixed with chemicals (denaturants) to make it unsuitable for consumption. This process allows manufacturers to avoid the taxes levied on potable alcohol, making it a cost-effective solution for industrial and commercial uses. Common denaturants include methanol, isopropanol, and various other substances that render the ethanol undrinkable. The resultant product retains the solvent properties of ethanol and is widely used in cleaning agents, solvents, and even as a fuel source in some applications.


  • NPK fertilizers are formulated to provide a balanced nutrient supply to plants. Each nutrient—nitrogen (N), phosphorus (P), and potassium (K)—serves a distinct function. Nitrogen is vital for leaf growth and overall plant vigor, phosphorus is essential for root development and flower formation, and potassium helps in regulating various physiological processes within the plant.


  • The primary function of E260 in food is to regulate acidity and pH levels. By controlling the acidity, it helps preserve the freshness and quality of food items, preventing spoilage and enhancing flavor. Acetic acid is particularly effective in inhibiting the growth of harmful bacteria and pathogens, making it a crucial ingredient in food preservation. For example, in pickling vegetables or canning foods, acetic acid creates an environment that discourages microbial growth, thereby extending shelf life.


  • In terms of regulatory approval, E516 is generally recognized as safe (GRAS) when used in accordance with good manufacturing practices. Regulatory bodies, including the EFSA and the U.S. Food and Drug Administration (FDA), continuously review food additives to ensure they meet safety standards. It is essential for consumers and producers alike to stay informed about such regulations and any updates that may arise regarding food safety.


  • Uses in Medical Applications


  • Ethylenediamine is a simple diamine with the molecular formula C2H8N2. Its structure consists of two amino groups (-NH2) attached to a two-carbon ethylene chain. This unique arrangement allows ethylenediamine to engage in multiple chemical reactions, making it a valuable intermediate in synthesizing various chemical products. Its high solubility in water and various organic solvents broadens its usability across different industries.


  • 1. Raw Material Costs The price of sodium benzoate is heavily influenced by the cost of raw materials used in its production, primarily benzoic acid and sodium hydroxide. Fluctuations in the prices of these chemicals due to market demand, production rates, and availability can lead to corresponding changes in the price of sodium benzoate.


  • 1. Methanol-denatured Ethanol This version contains methanol, which is highly toxic, thus preventing consumption. It is often used in laboratory settings and industrial applications.


  • Role in Food Processing


    phosphoric v acid

    phosphoric
  • Sulfur dioxide — Commonly used in dried fruit to prevent discoloration or to prevent bacterial growth in wine. The use of sulfites, including sulfur dioxide, to preserve fresh fruits and vegetables has been banned by the FDA for over 35 years, and they cannot be used on foods that are sources of vitamin B1. Those with asthma or sulfite allergies should avoid it, but for others it is regarded as safe.

  • Bread is a staple food in many cultures around the world, with its origins dating back thousands of years. While the basic ingredients of bread include flour, water, yeast, and salt, modern baking often incorporates a variety of food additives. These additives serve multiple purposes, including enhancing flavor, improving texture, extending shelf life, and ensuring consistency in production. This article explores the common food additives used in bread and their implications for health and nutrition.


  • Fiber