Thickener:
HEC suppliers play a crucial role in providing high-quality hydroxyethyl cellulose to manufacturers and formulators. These suppliers source the raw materials, process them into HEC, and ensure that the final product meets the desired specifications and quality standards. Hydroxypropyl methylcellulose (HPMC) is a versatile and widely used polymer in various industries. It is a semi-synthetic compound derived from cellulose, a natural polymer found in plants. HPMC is known for its unique properties, including its ability to thicken, bind, and stabilize a wide range of products. Benefits of Using HPMC Another factor that influences the price of HPMC is the production process. Different manufacturers may use varying production techniques and technologies, which can affect the quality and purity of the final product. Higher quality HPMC is typically more expensive than lower quality grades, as it requires more sophisticated production processes and higher levels of expertise. Hydroxyethyl cellulose (HEC), a chemical derivative of cellulose, is a non-ionic, water-soluble polymer that has found extensive use in a myriad of industries due to its unique properties. Its versatility stems from its ability to form stable solutions in cold and hot water, its non-toxic nature, and its ability to thicken, suspend, emulsify, and stabilize various substances. In the construction industry, HEC is a key ingredient in mortar and plaster due to its ability to control water loss and improve workability. It is also used as a non-ionic surfactant in drilling fluids for oil and gas exploration, enhancing the suspension of solids and preventing wellbore instability It is also used as a non-ionic surfactant in drilling fluids for oil and gas exploration, enhancing the suspension of solids and preventing wellbore instability
Hydroxypropyl methyl cellulose, commonly abbreviated as HPMC, is a versatile pharmaceutical excipient widely used in the formulation of various dosage forms. This semi-synthetic polymer is derived from naturally occurring cellulose, which is modified through the addition of methoxy and hydroxypropyl groups to improve its solubility and stability in water. The resulting compound possesses unique characteristics that make it an indispensable component in the manufacturing process of tablets, capsules, films, and even some types of suspensions and emulsions. One of the primary functions of HPMC is as a binder in the production of tablets. It provides cohesion between particles, ensuring that the tablet maintains its structure during compression and post-production handling. Moreover, HPMC can act as a release-controlling agent due to its ability to form a gel layer upon contact with aqueous fluids. This property allows for the sustained or controlled release of active pharmaceutical ingredients (APIs), which can optimize therapeutic efficacy by maintaining drug levels within the desired therapeutic window over an extended period. In addition to its role in solid dosage forms, HPMC also finds application in the preparation of film coatings. These coatings protect the core tablet or capsule from environmental factors such as moisture and light while improving the aesthetic appeal and patient acceptability of the medication. Furthermore, the use of HPMC in film coatings can facilitate the development of modified-release dosage forms, where the rate at which the API is released into the body is carefully managed to suit the treatment regimen. Another notable advantage of using HPMC is its non-toxicity and biocompatibility Another notable advantage of using HPMC is its non-toxicity and biocompatibility
One of the key functions of mortar bonding agents is to improve the bond strength between the mortar and the substrate. This is particularly important in applications where the substrate is not perfectly clean or smooth, as the bonding agent helps to fill in any gaps or imperfections, creating a strong and reliable bond. Without a bonding agent, the mortar may not adhere properly to the substrate, leading to potential failure and structural issues down the line.
HPMC is used as a binder, water retention agent, and plasticizer in cement-based products, such as mortars, plasters, and grouts. It is also used as a water-soluble polymer in the production of gypsum board and as a rheology-modifying agent in paint and coatings.
The applicant claims that the feed additive HPMC is specified to be manufactured to meet the specifications set for its use as a food additive. The main specifications as food and feed additive are: methoxyl groups ≥ 19 and ≤ 30%, hydroxypropoxyl groups ≥ 3 and ≤ 12%, loss on drying < 10%, sulfated ash < 1.5% (for products with viscosities of 50 mPa.s or above) or < 3% (for products with viscosities below 50 mPa.s). Five batches of the additive were analysed for some of the above specifications, resulting in: methoxyl groups (four batches) 23.5–29.2%, hydroxypropoxyl groups (four batches) 5.2–8.4%, loss on drying (one batch) 1.2% and sulfated ash (one batch) 0.6%. Only statements, without figures, of compliance with the specifications for some impurities (heavy metals, arsenic, solvents, microbial purity) were provided. Information on other impurities ((pesticides, dioxins, dioxin-like and non-dioxin-like polychlorinated biphenyls, mycotoxins, botanical impurities) was not provided.
HPMC CAS : No. 004-65-3
Marine and freshwater fish harbour an intestinal microbiota less abundant than in mammals, made of aerobic and facultative anaerobic bacteria. Limited and conflicting data have shown either the complete lack of cellulose degradation in the trout or tilapia, or a limited (13%) activity in the trout. A digestibility study carried out in the trout and the carp administered a purified (devoid of lignin and reduced amount of hemicelluloses) crystalline cellulose extracted from wood (fibre length ˂ 150 μm, diameter ˂ 45 μm), showed the practical absence of cellulose degradation in both species (Bergot and Breque, 1983).
There are several types of liquid thickeners available on the market, including starch-based thickeners like cornstarch and arrowroot, as well as gel-based thickeners like agar agar and xanthan gum. Each type of thickener has its own unique properties and can be used for different purposes. Introduction Applications of HPMC in Building Coatings In the cosmetic industry, HEC is used as a stabilizer and suspending agent. Lower viscosity grades are often preferred here, as they provide a smooth texture without affecting the product's flow characteristics.Due to its excellent mucoadhesive properties, HPMC gel is used in ophthalmic solutions to provide longer residence time on the ocular surface and improve drug absorption.