Differences between hydroxypropyl starch and Hydroxypropyl methyl cellulose

Hydroxypropyl Starch Ether is unfamiliar to many people, and thought to be a little different from common starch, but that’s not the case. HPS has a very small amount used in mortar products, and a very low addition amount enables to achieve very good quality effects.


Hydroxypropyl Starch Ether is a white fine powder free from plasticizers, prepared from natural plants, which are modified, highly etherified, and spray dried. It is totally different from common or modified starch.

 

Hydroxypropyl methyl cellulose​ (HPMC for short), also known as hypromellose or hydroxypropyl methyl cellulose ether, is prepared from selection of highly pure cotton cellulose, treated in 35-40℃ alkali liquor for 0.5h, squeezed to smash cellulose, and properly aged at 35℃ to make average polymerization degree of alkali fiberobtained within the required range. Put alkali fiber into the reaction kettle, then add propylene oxide and methyl chloride in order for 5h etherification at 50-80℃, with the maximum pressure of 1.8MP. Afterwards, add an appropriate amount of hydrochloric acid and oxalic acid into 90℃ hot water for washing the materials and expanding the volume. Then use the centrifugal machine for dehydration and finally become neutral with repeated washings. It is widely used in building, chemical, coatings, pharmaceutical and military industries, respectively as a film former, binder, dispersant, stabilizer and thickener.

 

HPMC can be used as an admixture of cement-based, gypsum-based and ash-calcium products, having good compatibility with other admixtures in building. Its use in conjunction with HPMC enables to reduce the amount of HPMC (usually an amount of 0.05% HPS added can reduce by about 20%-30% of HPMC’s amount), play thickening roles, promote the inner structure, possess better crack resistance and improve workability.

评论

发表评论

此博客中的热门博文

What Does Copper Peptide Do?

图片
  Copper peptides, also known as GHK-Cu peptides, are a type of natural peptide compound that consists of a copper ion attached to a peptide chain. These peptides have gained significant attention in recent years due to their various applications and potential benefits in skin care, wound healing, and tissue repair. In this article, we will delve into the applications and   benefits of copper peptide , exploring the ways it can positively impact our well-being.   Applications of Copper Peptide   1. Skin Regeneration and Anti-Aging   Copper peptide has garnered immense interest in the field of dermatology due to its ability to enhance skin regeneration and fight against signs of aging. It stimulates the synthesis of collagen, a protein that is vital for maintaining the elasticity and firmness of the skin. By promoting collagen production, copper peptide helps reduce the appearance of wrinkles, fine lines, and improves overall skin texture.   Moreover, copper...
阅读全文

What is citicoline sodium used for?

图片
   Unlocking the Potential: The Uses of   Citicoline Sodium In a fast-paced world that demands peak cognitive performance, the search for substances that enhance brain function and promote overall mental well-being is unceasing. Among the compounds that have emerged as potential cognitive enhancers, citicoline sodium stands out for its diverse applications and promising benefits. In this article, we delve into the multifaceted uses of citicoline sodium and explore its impact on brain health and beyond. The Basics of Citicoline Sodium: Citicoline, also known as cytidine 5'-diphosphocholine (CDP-choline), is a naturally occurring compound found in the cells of human and animal tissues. It plays a vital role in the synthesis of cell membranes and serves as a precursor to two essential molecules: choline and cytidine. These molecules are crucial for the synthesis of neurotransmitters, such as acetylcholine, and for DNA synthesis, respectively. Citicoline sodium is the salt fo...
阅读全文