What is the main use of Hydroxypropyl Methyl Cellulose?
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HPMC is widely used in building materials, coatings, ceramics, cosmetics, pharmaceuticals, food and other industries.HPMC can be divided into industrial grade, food grade and pharmaceutical grade according to its use.
What are the main technical indexes of Hydroxypropyl Methyl Cellulose?
Hydroxypropyl content, methyl content, viscosity, ash content, and loss of dryness.
How many kinds of hydroxypropyl methylcellulose are there and what is their difference?
HPMC can be divided into instant and hot soluble types. The instant product, meet cold water quickly dispersed, disappeared in the water, at this time the liquid has no viscosity, because HPMC is only dispersed in the water, not really dissolved. At this time, the liquid has no viscosity, because HPMC is just dispersed in the water, not really dissolved. After about 2 minutes of stirring, the viscosity of the liquid will slowly become bigger, and it will form a transparent white sticky gel. Hot soluble products, cold water clumping, can be in hot water, quickly dispersed, disappear in hot water, and so the temperature drops to a certain temperature (according to the gel temperature of the product), the viscosity slowly appears until the formation of transparent viscous colloid.
What are the dissolving methods of hydroxypropyl methyl cellulose?
(1) All models can be added to the material by dry mixing method;&#;
(2) When it needs to be added directly into room temperature water solution, it is better to use cold water dispersion type, which can be thickened in 10-90 minutes after adding;
(3) Ordinary type can be dissolved after stirring and dispersing with hot water first, and then adding cold water for cooling;&#;
(4) If lumps occur when dissolving, it is because of insufficient mixing or the ordinary model is added directly into the cold water, then it should be stirred quickly.&#;
(5) If bubbles are generated when dissolving, they can be removed by standing for 2-12 hours (the specific time is determined by the consistency of the solution) or by vacuuming or pressurizing, or by adding appropriate amount of antifoam agent.&#;
How to determine the good or bad of hydroxypropyl methylcellulose simply and intuitively?
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(1) Whiteness: although whiteness can not decide whether HPMC is good or not, and if the whitening agent is added in the production process, it will affect its quality, but most of the good products have good whiteness.
(2) fineness: HPMC fineness generally have 80 mesh and 100 mesh, 120 mesh is less, the finer the finer the better.
(3) Transmittance: HPMC into the water, the formation of transparent colloid, look at its transmittance, transmittance, the greater the better, that is, less insoluble matter inside, vertical reactor through the degree of generally good, horizontal reactor to be poorer, but does not indicate that the quality of vertical kettle production than the production of horizontal kettle, product quality, there are a lot of factors to decide.
(4) Specific gravity: the greater the specific gravity, the heavier the better, than the major, generally because of the high content of hydroxypropyl inside, hydroxypropyl content is high, the water retention to be better.
How much viscosity of hydroxypropyl methylcellulose is suitable?
Putty powder generally with 100,000 viscosity can be, mortar requirements of higher, to 150,000 viscosity is good to use, and, HPMC is more important role is water retention, followed by thickening. In putty powder, as long as the water retention is good, lower viscosity (70,000-80,000) is also possible, of course, the viscosity of the greater water retention to be relatively better, when the viscosity of more than 100,000 viscosity, viscosity on the water retention of the impact is not great.
Recommended reading: hpmc grades viscosities
Hydroxypropyl methylcellulose, commonly known as HPMC for short, is a versatile and widely used chemical ingredient derived from cellulose, which is the main structural component of plants. It is a type of cellulose ether commonly used in various industries, including pharmaceuticals, detergents, personal care, food, and building materials.
HPMC is a white or yellowish, odorless, tasteless, and non-toxic powder that is soluble in cold water. It can efficiently help to form gels, thicken solutions, and stabilize surfactant emulsions, making it a valuable addition to many detergents and personal care products, such as laundry detergent liquid, dishwashing liquid, shampoos, body wash, and lotion.
- Solubility: HPMC is highly soluble in cold water and can form gels, making it suitable for use in a wide range of products.
- Thickening and stabilizing: HPMC is able to thicken and stabilize solutions, emulsions, and suspensions, making it useful in products such as detergents, personal care products, and cosmetics.
- Film-forming: HPMC can form films when applied to surfaces, making it useful as a protective coating or film-forming agent in a variety of products.
- Non-toxic: HPMC is generally considered to be non-toxic and safe for use in a variety of products.
- Non-irritant: HPMC is generally non-irritating to the skin and mucous membranes, making it suitable for use in personal care products and pharmaceuticals.
- pH-stable: HPMC is stable over a wide range of pH values, making it suitable for use in products with varying pH levels.
- Shelf-stable: HPMC is stable over a wide range of temperatures and humidity levels, making it suitable for use in products with a long shelf life.
- Versatility: HPMC has a wide range of applications in industries such as pharmaceuticals, food, cosmetics, and building materials, making it a highly versatile ingredient.
Stable at an extensive pH range and suitable for use in acidic and alkaline environments.
Pack in tight-closed containers(drums or tanks); Store in a dry, ventilated and cool place; Kept away from direct sun and water.
Under proper storage conditions, the shelf life of Yeser® HPMC is 24 months.
The recommended dosage of Yeser® HPMC in detergents and personal care products is 0.1%-10.0%.
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