Hydroxypropyl Methyl Cellulose

Hydroxypropyl methyl cellulose, also known as hydroxypropyl cellulose and cellulose hydroxypropyl methyl ether, is made of high-purity cotton cellulose as raw material and specially etherified under alkaline conditions.

(1) Main purpose:

① Polyvinyl chloride: used as a dispersant in the production of polyvinyl chloride, and the main auxiliary agent for the preparation of polyvinyl chloride by suspension polymerization.

②Construction industry: As a water-retaining agent and retarder of cement mortar, the mortar can be pumped. Used as a binder for plaster, plaster, putty powder or other building materials to improve dispersibility and extend the use time. It can be used as a strengthening agent for tile, marble, plastic decoration, and sticking, and can reduce the amount of cement. The water retention properties of HPMC prevent the slurry from cracking due to excessive drying after application, and improve the strength of the slurry after hardening.

③Ceramic manufacturing industry: widely used as a binder for ceramic products.

④Coating industry: As a thickener, dispersant and stabilizer in the coating industry, it has good compatibility in water or organic solvents. Used as paint remover.

⑤Ink printing: As thickener, dispersant and stabilizer in the ink industry, it has good compatibility in water or organic solvents.

⑥ Plastic: used as a release agent, softener, lubricant, etc.

⑦Pharmaceutical industry: coating materials, film materials, controlled-release polymer materials, stabilizers, suspending agents, tablet adhesives and tackifiers for sustained-release preparations.

⑧Others: This product is also widely used in leather, paper products, fruit and vegetable preservation, textiles and other industries.

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The Partnership Between Hydroxypropyl Methylcellulose And Cement And Mortar

 You may be strange when it pertains to hydroxypropyl methyl cellulose, however when it involves cement, mortar, and concrete, every person is familiar with it. HPMC for cement mortar is a crucial additive in concrete, mortar, and also concrete. Let's have a look at hydroxypropyl. What are the results of methyl cellulose on the residential or commercial properties of cement, mortar and concrete.

The result of hydroxypropyl methylcellulose on concrete mortar:
1. The enhancement of hydroxypropyl methyl cellulose has an apparent slowing down result on the mortar mix. As the content of hydroxypropyl methyl cellulose boosts, the setup time of the mortar is together expanded. The very same hydroxypropyl methyl fiber When it comes to ordinary content, the setting time of mortar developed underwater is longer than that of formed in air. This feature is valuable for undersea concrete pumping.
2. The fresh mixed cement mortar blended with hydroxypropyl methylcellulose has excellent cohesive homes as well as almost no bleeding.
3. Including hydroxypropyl methylcellulose undersea non-dispersible concrete admixture, as well as managing the dose is beneficial to the stamina. The pilot job reveals that the toughness ratio of concrete formed in water to that in air is 84.8%, which is much more effective.
4. The incorporation of water-reducing representative has improved the problem of raising water need of mortar, however its content should be controlled fairly, or else the undersea anti-dispersion building of fresh concrete mortar will certainly sometimes be minimized.
The hydroxypropyl methyl cellulose (HPMC) utilized in concrete mortar requirements to have a greater thickness, with a viscosity of 150,000 or even more, and the resulting mortar has a far better shape. The high-purity hydroxypropyl methyl cellulose can Make concrete mortar much better.

The result of hydroxypropyl methylcellulose on concrete:
In concrete, the enhancement quantity of hydroxypropyl methyl cellulose will certainly not be made use of excessive, yet it can dramatically boost the performance of concrete. In particular, the choice of hydroxypropyl methyl cellulose with various levels of viscosity will certainly boost the efficiency of concrete. Play a positive influence. Hydroxypropyl methylcellulose has outstanding enlarging buildings as well as can be used as concrete to stand up to dispersion as well as extrusion.

What Is Hydroxypropyl Methyl Cellulose?

 Hydroxypropyl methyl cellulose, also known as its abbreviation HPMC. It is made from cellulose and is used as a thickening agent in foods. It comes in two types: HPC and L-HPC, the latter of which is a low-substituted form of HPC that acts as a binder and disintegrant in the medical world.

What is hydroxypropyl cellulose?

Cellulose can be divided into two grades, HPC (conventional) and L-HPC (short for low-substituted hydroxypropyl cellulose), based on the degree of substitution or amount of hydroxyl propoxy in the skeleton.

Because HPC has a larger amount of hydroxypropoxy than L-HPC, HPC is soluble in water, while L-HPC is insoluble in water. Because of this property, HPC can be used in aqueous solutions, while L-HPC cannot.

What is hydroxypropyl cellulose made of?

Cellulose is a glucose polymer containing hydroxyl groups (-OH) that can be replaced by hydroxyl propoxy groups (-OCH 2 ChohCH 3) to produce HPC. The mechanism is the same as that of sodium CMC.

Since the hydroxyl added to the hydroxyl propoxy group can also be etherified, the manufacturing process can be further facilitated.

What are the uses of hydroxypropyl cellulose?

HPC can be used in foods as thickeners, emulsifiers and stabilizers in foods and cosmetics. L-HPC is commonly used as a disintegrating agent and binder for tablets in pharmaceutical applications.

Food and beverage

Precooked food

HPC keeps burgers, pizzas, chicken and other foods fresh by spraying them on the surface before cooking them. During cooking, it can disintegrate quickly in less than 3 minutes.

Stabilizer

HPC acts as a stabilizer in ice cream and frozen milk to prolong storage time and improve overflow; It is used as a coating on chocolate to prevent softening, oxidation and mildew of chocolate when stored at freezing temperatures.

It is also used to stabilize bulk foods. It has excellent foaming properties and works well with vegetable oils.

Cosmetics

According to the "European Commission Database of Information on Substances and Ingredients in Cosmetics", HPC can be used as adhesives, emulsifiers, emulsion stabilizers, film forming agents and viscosity control agents in cosmetics and personal care products.

Pharmaceuticals

L-HPC can be used as a disintegrating agent because of its swelling in water. Also, due to its good compressibility and binding ability, it is beneficial for both wet and dry mixing in hard tablets.

Let's look at the details.

Disintegration

L-HPC absorbs water and significantly expands its volume, although it is not suitable for use in water. This swelling ability accelerates disintegration and increases the fineness of the tablet dispersion.

In both vitamin C tablets and aspirin tablets, L-HPC showed better disintegrating ability than other disintegrating agents (e.g., starch sodium glycoacetate).

The compression

L-HPC can be used as a binder for direct compression and wet granulation tablets. L-HPC increases the hardness of the tablet compared to other excipients, such as sodium carboxymethyl cellulose crosslinked.

And because it is non-ionic, it improves the bioavailability of the API. At the same moisture content, it is almost impossible to react with the active ingredient in the tablet as compared to ionic excipients.

Treat dry eyes

Hydroxypropyl fiber is an ingredient in many prescriptions for treating dry eye and other eye diseases, such as keratitis, that reduce corneal sensitivity.