In summary, hydroxyethyl cellulose has been widely used in various fields due to its excellent thickening, stability, adhesion, emulsification, dispersion and other properties. With the continuous development of science and technology, the application fields of hydroxyethyl cellulose will continue to expand and deepen.
In order to improve the redispersibility of redispersible polymer powder and prevent caking during drying and storage, protective colloids or surfactants (emulsifiers) should be added before drying, making the redispersible polymer powder with strong hydrophilicity and alkali sensitivity. The most commonly used protective colloid is partially hydrolyzed polyvinyl alcohol (PVA). PVA contains a lot of hydroxyl groups, with quite poor water resistance. And the vinyl acetate polymer itself is poor in the water resistance, especially hot water resistance, due to its polar ester and carboxyl groups. In the redispersible polymer powder containing PVA and carboxyl groups, polyvalent metal salts can be added to improve its water resistance, especially hot water resistance, since PVA and carboxyl groups can react with metal salts to become insoluble in water. In the emulsion containing PVA, aldehydes can also be added for PVA acetalization and then to reduce its water absorption. In addition to PVA, some other protective colloids with good water resistance can also be selected to ensure the water resistance of product, such as polyacrylic acids and modified polyacrylic acids.
Furthermore, RDP polymers are known for their versatility. They can be produced from various base resins, including vinyl acetate, ethylene, and styrene-acrylic copolymers, allowing manufacturers to tailor their properties to specific needs. This adaptability makes RDP polymers suitable for a wide range of uses, from construction to consumer goods.
Mu nthawi yamakono, kuwerengera ntchito ya HPMC ndi HEC ndikofunikira kuti makampani azikhala akugwira ntchito bwino. M'zaka zapitazi, kuyesa kuthandiza HPMC ndi HEC kudzakhala kwachangu, ndipo izi zikhala ndi mwayi watsopano kwa makampani omwe akufuna kukulitsa magwiridwe antchito. Pambuyo pa zonsezi, HPMC ndi HEC ndizinthu zomwe zitha kukonza momwe m'maonekedwe a zamagetsi, koma mwachinsinsi, zikhala ndi maonekedwe otchuka mu makampani osiyanasiyana. Zikhalidwe izi zikugwiritsa ntchito luso la sayansi komanso ukadaulo, komanso zimapangitsa kuti makasitomala azichita ndi zinthu zomwe zikhala ndi mphamvu komanso zotsika mtengo.