Special Chemical and PPE
Zhengxiang company also cover part of the construction chemicals such as HPMC (Hydroxypropyl Methyl Cellulose), HPS(Hydroxypropyl Starch Ether) and RDP(Redispersible Polymer Power), and the personnel private equipment such as ventilator.
When our potential technologies transfer to the real products, we will offer more to our customers.
SHANDONG ZHENGXIANG PETROLEUM TECHNOLOGY CO.,LTD
Zhengxiang company is a capably professional chemical company, located in Dongying city, the city of oil. We have a professional technical and sales team which have full experience in chemical field including many-years working experience in a global international company, and familiarity with international business, trade rules and domestic chemical industry.
Why Choose Us
Health Insurance
Strictly follow the MSDS and domestic & foreign safety and environmental protection laws and regulations, and actively implement HSE management.
Flexible and Fast Logistic Mode
Sea and land transport ("China Railway Express", other railways, trucks), joint sea-and-rail transportation. Transfer or direct. Various packaging forms.
The Most Suitable Solution
The most expensive / cheapest or best quality are not the best for every customer. Providing the most suitable solution for different customers in different countries and regions.
Excellent Technology
Adhere to self-research and development, and strong alliance with a number of universities / research institutes / professional factories.
After-sale Service
From pre-sale to after-sale, our professional service is throughout the whole process.
Social Responsibility
Protect the rights of shareholders and employees, and actively participate in social welfare activities and community activities.
What is Hydroxypropyl Methyl Cellulose
Hydroxypropyl methyl cellulose (HPMC) is a semi-synthetic, inert, viscoelastic polymer derived from cellulose. It is produced by reacting methyl chloride and propylene oxide with cellulose in the presence of sodium hydroxide. This reaction modifies the hydroxyl groups on the cellulose chain, introducing both methyl and hydroxypropyl substituents.
HPMC is widely used in various industrial and consumer products due to its unique properties, which include:
Controlled Viscosity
HPMC solutions exhibit a range of viscosity levels, depending on the degree of substitution and the molecular weight of the polymer. This property allows for precise rheological control in formulations.
Film Formation
HPMC can form a flexible film upon cooling after being heated in solution, which is useful in applications like food packaging and coating industries.
Water Retention
It has good water holding capacity, which makes it suitable for use in construction materials, adhesives, and cosmetics.
Thickening Agent
HPMC acts as a thickener and stabilizer in emulsions, lotions, and other personal care products.
Binder
It serves as an adhesive binder in the production of ceramics, detergents, and agricultural films.
Release Agent
HPMC is utilized as a tablet release agent in the pharmaceutical industry to facilitate the disintegration of tablets in the digestive tract.
What Does Hydroxypropyl Cellulose do to The Body?
Hydroxypropyl cellulose (HPC) is a non-ionic cellulose ether that is commonly used as a viscosity modifier, binder, film former, and emulsifier in various industries, including pharmaceuticals, cosmetics, food, and construction. In medicine, it is used primarily as a tablet excipient or coating agent.
When ingested or applied to the skin, HPC is not known to have significant systemic effects on the body. It is considered physiologically inert, meaning it does not react with the body's tissues or fluids. Its primary function is to act as a physical additive that can improve the texture, stability, or delivery of the medication or cosmetic product it is included in.
In pharmaceutical applications, HPC may be used to enhance the flowability of powders, to act as a binder in tablet formation, or to create a protective coat around tablets to control the release of the active ingredients. As a coating material, it helps to mask unpleasant tastes, protect the tablet from environmental degradation, and modify the release rate of the drug.
Since HPC is not absorbed into the bloodstream, it does not directly interact with biological systems or organs. Therefore, it is generally considered safe for use in products that come into contact with the human body. However, as with any substance, individual sensitivities or allergies to HPC are possible, although these are rare. If there is a history of hypersensitivity to cellulose ethers, individuals should exercise caution.
What is Hydroxypropyl Methyl Cellulose Used For?
Hydroxypropyl methyl cellulose (HPMC) is a versatile cellulose ether derived from methyl cellulose. It is widely utilized across multiple industries due to its ability to provide a controlled release of active substances, act as a binder, thickener, stabilizer, and film former.
In the food industry, HPMC serves as a thickening and emulsifying agent, improving the texture and mouthfeel of food products. It is also used as a fat substitute and can help to reduce calories in foods.
In the pharmaceutical industry, HPMC is used as a direct compression aid, a disintegrant, a binder, and as a coating material for tablets. As a coating, it can be used to control the release of active ingredients, protect the tablet from environmental factors, and improve patient compliance by masking unpleasant tastes.
The construction industry relies on HPMC as a component in drymortars, such as adhesives, grouts, and self-leveling compounds. It enhances the water retention and workability of these mixtures without significantly affecting their open time or final setting properties.
Furthermore, in the cosmetic and personal care sector, HPMC acts as a gelling agent, providing a creamy consistency to lotions and creams. It can also be used to stabilize emulsions and control rheological properties.
Due to its biodegradable nature and non-toxic profile, HPMC is a preferred choice for environmentally conscious applications. It is generally recognized as safe (GRAS) by the U.S. Food and Drug Administration (FDA) for its intended uses.
Is Hydroxypropyl Cellulose Safe in Supplements?
Hydroxypropyl cellulose (HPC) is generally recognized as safe (GRAS) by the U.S. Food and Drug Administration (FDA) for use as an indirect food additive in the components that contact food. When it comes to dietary supplements, HPC can be used as a viscosity enhancer, binder, or tablet excipient.
In supplements, HPC is typically used for its gel-forming and film-forming properties, which can improve the texture of powders or contribute to the formation of sustained-release tablets. As a supplement excipient, it is considered safe when used within acceptable daily intake limits and according to good manufacturing practices.
However, it is always important for manufacturers to comply with regulatory guidelines and ensure that all ingredients, including HPC, are listed accurately on product labels. Consumers should consult with healthcare providers before starting any new dietary supplements, especially if there are any underlying health conditions or potential interactions with other medications.
Hydroxypropyl methyl cellulose (HPMC) is a derivative of cellulose with varied industrial applications, including those in construction materials. The main technical indicators that define the quality and specifications of HPMC include:
Viscosity: Measured in mPa·s (millipascal seconds), viscosity indicates the fluidity of HPMC solutions. Different grades of HPMC have different viscosity ranges, which affect the product's flow characteristics and application behavior.
Methyl Content (M): This parameter indicates the proportion of methyl ether groups in the HPMC molecule and influences its water solubility and sensitivity to alkaline substances.
Hydroxypropyl Content (H): This reflects the amount of hydroxypropyl groups in the HPMC molecule and affects the product's thickening ability and freeze-thaw stability.
Loss on Drying: Expressed as a percentage, it indicates the water content in the HPMC, which should be low to ensure product stability and consistency.
PH Value: HPMC solutions should have a pH value within a certain range, usually close to neutral, to ensure compatibility with various construction materials.
Appearance: HPMC should have a consistent appearance, typically as a white to off-white powder or granules.
Solubility: Good solubility in water is essential, with the degree of solubility depending on the molecular structure of the HPMC.
Heavy Metal Content: The content of heavy metals such as lead, cadmium, mercury, and chromium should be below specified limits to ensure environmental and health safety.
Chloroform Extract: This measure indicates the amount of non-water soluble impurities and should be minimal.
Specific Optical Rotation: This is a measure of the compound's purity and optical activity.
Ash Content: The inorganic residue left after incineration, expressed as a percentage; it should be low to indicate minimal contamination.
Sieve Analysis: Determines the particle size distribution of the HPMC powder, ensuring it meets the required specifications for ease of handling and application.
These indicators are crucial for specifying the properties of HPMC and determining its suitability for various applications in the construction industry, where it serves as a thickener, adhesive, or controlled-release agent, among other functions. Manufacturers and suppliers often provide detailed technical data sheets that specify these parameters for each grade of HPMC offered.
Hydroxypropyl methyl cellulose (HPMC) is a versatile cellulose ether that is derived from cellulose by partial substitution with methyl and hydroxypropyl groups. HPMC is classified based on its methoxyl and hydroxypropoxyl content, which determines its solubility, viscosity, and application suitability.
The primary categories of HPMC include:
**HPMC E4** - This grade has a low degree of substitution and is essentially insoluble in cold water but swells to a gel-like consistency. It is often used in hot-melt adhesives, textile sizing, and as a thickener in food applications that require heat for activation.
**HPMC E5** - This type is slightly soluble in cold water and is commonly used in construction materials as a water-retaining agent in mortar and concrete, as well as in pharmaceuticals and cosmetics.
HPMC E6
This grade is more soluble in cold water and has medium viscosity. It is widely used in the paint and building industry as a thickener and rheology modifier, in adhesives, and in the food industry.
HPMC E7
This type has higher solubility and viscosity and is used in the same applications as E6, but often requires less HPMC for the desired effect.
HPMC E8
This is a highly viscous grade that is completely soluble in cold water. It is used for high-performance applications, including in high-demand building materials, adhesives, and as a release agent for technical coatings.
What is Hydroxypropyl Starch Ether
Hydroxypropyl starch ether is a modified starch that is synthesized by reacting starch, which is a polysaccharide consisting of glucose units, with propylene oxide under alkaline conditions. The modification introduces hydroxypropyl groups (-CH2CHOH-CH3) into the starch molecule, altering its physicochemical properties.
These modifications result in starches with improved characteristics compared to native starches, including:
● Enhanced Solubility: Hydroxypropyl starch ethers tend to have better solubility in cold water compared to native starches, which are typically only water-soluble at higher temperatures.
●Altered Viscosity: These ethers can display different viscosity profiles, which are adjustable based on the degree of substitution and the type of starch used as the base material.
● Improved Stability: The hydroxypropyl groups can enhance the stability and reduce retrogradation, which is the tendency of starches to recrystallize over time and change texture.
● Increased Resistant to Enzymatic Hydrolysis: The chemical modification makes the starch less susceptible to enzymes like amylases, which break down starches into sugars.
Hydroxypropyl starch ethers find applications in various industries, including:
● Food Industry: As a thickener, stabilizer, or texturizer in sauces, dressings, confectionery, and baking.
● Pharmaceutical Industry: As a binder, disintegrant, or controlled-release agent in tablet formulations.
● Paper Industry: As a sizing agent to improve paper's resistance to water and ink.
● Textile Industry: As a component in sizing agents for yarn or as a finishing agent for fabrics.
The safety and suitability of hydroxypropyl starch ethers in specific applications must adhere to regulations and standards set by relevant authorities, such as the FDA for food and drug products in the United States. Manufacturers must ensure that the modified starches meet safety requirements and are properly labeled when used in consumer products.
What is Hydroxypropyl Starch Ether Used For?
Hydroxypropyl starch ether (HPS) is a modified starch that is widely used for its unique physicochemical properties. It is produced by substituting some of the hydroxyl groups in starch with hydroxypropyl groups. The modification improves the solubility, stability, and thickening properties of starch.
HPS has applications in various industries:
Food Industry: HPS is used as a thickener, stabilizer, and emulsifier in food products. Its ability to form a clear solution without turbidity makes it suitable for use in beverages, jellies, sauces, and confectionery items.
Pharmaceutical Industry: In the pharmaceutical sector, HPS serves as a binder, disintegrating agent, and filler in tablet formulations. Its modified properties enhance the flowability and compressibility of powders.
Paper Making: HPS is utilized as a sizing agent in paper production to improve the surface properties of the paper and reduce ink penetration, contributing to better print quality.
Textile Industry: It acts as a water-retention agent in textile processing, helping in the sizing of yarns and improving the overall quality of fabrics.
Construction Industry: Hydroxypropyl starch ether can be used as a water-reducing agent in concrete, enhancing workability without increasing water content, which can lead to stronger and more durable concrete.
Cosmetics: In cosmetics, HPS functions as a viscosity enhancer and stabilizer in lotions, creams, and other personal care products.
Due to its versatile nature, HPS is valued for its performance characteristics in various industrial applications, providing improved processing and product qualities. However, like all additives, the usage of HPS is regulated, and manufacturers must comply with safety standards and labeling requirements.
What is Hydroxypropyl Made From?
Hydroxypropyl groups are introduced into various materials through chemical modification processes. For instance, in the context of hydroxypropyl cellulose (HPC) and hydroxypropyl starch ether, the hydroxypropyl groups are added to the cellulose or starch polymers through a process involving propylene oxide.
In the case of hydroxypropyl cellulose:
● Native cellulose, sourced from plant cell walls or wood, is reacted with sodium hydroxide to create alkali cellulose.
● Propylene oxide is then used to introduce hydroxypropyl groups onto the alkali cellulose.
● The degree of substitution (the number of hydroxypropyl groups added per glucose unit in the cellulose backbone) can be adjusted to achieve the desired properties.
For hydroxypropyl starch ether:
● Native starch, which is a polysaccharide composed of glucose units, is dispersed in water.
● An alkaline catalyst, such as sodium hydroxide, is added to the starch solution to swell the granules and make the hydroxyl groups more reactive.
● Propylene oxide is then added to react with the hydroxyl groups on the starch molecules, forming hydroxypropyl groups.
● The reaction conditions, such as time, temperature, and molar ratio of reagents, are carefully controlled to optimize the degree of substitution and the characteristics of the modified starch.
Both hydroxypropyl cellulose and hydroxypropyl starch ether are examples of how hydroxypropyl groups can be chemically grafted onto naturally occurring polymers to create materials with enhanced properties suitable for a wide range of industrial applications.
Introduction to Starch Ether
The more common and commonly used are potato starch, tapioca starch, corn starch, wheat starch, etc. Compared with cereal starches with higher fat and protein content, the starches of root crops such as potato and tapioca starch are purer.
Starch is a polysaccharide polymer compound composed of glucose. There are two kinds of molecules, linear and branched, called amylose (content about 20%) and amylopectin (content about 80%). To improve the starch properties used in building materials, physical and chemical methods can be used to modify it to make its properties more suitable for the needs of building materials for different purposes.
Etherified starch includes many types of products, such as carboxymethyl starch ether (CMS), hydroxypropyl starch ether (HPS), hydroxyethyl starch ether (HES), cationic starch ether, etc. The commonly used hydroxypropyl starch ether.
The Role of Starch Ether in the Mortar
Thicken the mortar, increase the sag resistance, sag resistance, and rheology of the mortar
For example, in the construction of tile adhesive, putty, and plastering mortar, especially now that mechanical spraying requires high fluidity, for example, it is imperative in a gypsum-based mortar (machine sprayed gypsum needs high fluidity but will cause severe sagging. Starch ether can make up for this defect).
Liquidity and sag resistance are often contradictory, and the increase in fluidity will bring about a decline in sag resistance. The mortar with rheological properties can well solve the contradiction that when an external force is applied, the viscosity will decrease, and the workability and pumpability will be enhanced. When the external force is withdrawn, the viscosity will increase and improve the sag resistance.
For the current trend of increasing tile area, adding starch ether can improve the tile adhesive slip resistance.
Extend opentime
It can meet the requirements of special tile adhesives for tile adhesives with extended opening hours (Class E, extend from 20min to 30min to reach 0.5MPa).
Improved surface properties
Starch ether can make the surface of gypsum-based and cement mortar smooth, easy to apply, and has an excellent decorative effect. It is significant for plastering mortars and thin-layer decorative mortars such as putty.
The Mechanism of Action of Starch Ether
When starch ether is dissolved in water, it will be evenly dispersed in the cement mortar system. Because starch ether molecules have a network structure and are negatively charged, they will adsorb positively charged cement particles. As a transition bridge, the cement can be connected to give the slurry a more considerable yield value, improving the anti-sagging or anti-slip effect.
The Difference Between Starch Ether and Cellulose Ether
Starch ether can effectively improve the anti-sagging and anti-slip properties of the mortar.However, cellulose ethers can generally only increase the viscosity and water retention of the system, but not the anti-sagging and anti-slip properties.
Thickening and viscosity:generally, the viscosity of cellulose ether is about tens of thousands, while the viscosity of starch ether is several hundred to thousand, but this does not mean that starch ether is not as thick as cellulose ether in thickening mortar. The thickening mechanism of the two is different.
Compared with cellulose ether, starch ether can significantly increase the initial yield value of tile adhesive, thereby improving its anti-slip performance
Air-entraining: cellulose ether has strong air-entraining properties, while starch ether has no air-entraining properties.
Molecular structure of cellulose ether. Although both starch and cellulose are composed of glucose molecules, their composition is different. The orientation of all glucose molecules in starch is the same, while cellulose is just the opposite, that is, the orientation of each adjacent glucose molecule is opposite. This structural difference also determines the difference in the properties of cellulose and starch.
Our Factory
Key employees of our company have rich experience in the chemical industry and more than 20 years of working experience in global international companies, and be familiar with international business, trade rules and domestic chemical industry.Our business has been involving many countries, widely sold in the Middle East, Central and Western Asia, Indonesia, India, Bangladesh, Russia, and other countries.
FAQ
As one of the most professional special chemical and ppe manufacturers and suppliers in China, we're featured by quality products and competitive price. Please rest assured to buy customized special chemical and ppe from our factory.