Dois outros processos de preparação de hidroxietilcelulose (HEC)
Gas phase method: The gas phase method is to add additives or diluents during the reaction process, and the alkali fibers and EO react in the gas phase. The cotton fibers were soaked and activated in 18.5% NaOH solution, then pressed and crushed and placed in the reactor. The reactor was evacuated, filled with nitrogen […]
O processo de preparação da hidroxietilcelulose
Alkali cellulose is a natural macromolecule. Each fiber-based ring contains three hydroxyl groups. The most active hydroxyl groups react to form hydroxyethyl cellulose. Soak raw cotton linters or refined pulp in 30% liquid caustic soda, take out and press after half an hour. Squeeze until the ratio of alkaline water reaches 1:2.8, and then pulverize. […]
Uma breve introdução à hidroxietilcelulose
Hydroxyethyl cellulose (HEC), chemical formula (C2H6O2)n, is a white or light yellow, odorless, non-toxic fibrous or powdery solid composed of alkaline cellulose and ethylene oxide (or chlorohydrin) It is prepared by etherification and belongs to non-ionic soluble cellulose ethers. Because HEC has good properties such as thickening, suspending, dispersing, emulsifying, bonding, film-forming, protecting moisture and […]
Aplicação de HPMC em outros campos
As a printing dye paste, it can be used in pigments, borosilicate dyes, basic dyes, and textile dyes. In addition, it can be used together with thermosetting resins in the corrugation of kapok. It is used for leather surface glue and oil-resistant processing of carbon paper. Use as a final lube or as a one-time […]
Qual é a aplicação do HPMC no setor de alimentos?
Adding HPMC to canned food can prevent whitening and deterioration due to the decomposition of citrus glycosides during storage, thereby achieving a fresh-keeping effect. Add to sherbet, ice, etc. in cold fruit products to make the taste better.At the same time as an emulsifying stabilizer or thickening agent for sauces, ketchup. And it can be […]
Aplicação de HPMC na indústria química
Polimerização de cloreto de vinila e vinilideno: Como estabilizador de suspensão e dispersante durante a polimerização, pode ser usado junto com álcool vinílico (PVA) e hidroxipropilcelulose (HPC) para controlar o formato e a distribuição das partículas. Adesivo: Como adesivo de papel de parede, geralmente pode ser usado junto com tinta látex de acetato de vinila em vez de amido. Pesticidas: quando [...]
Aditivos para materiais de construção - HPMC
At the same time, HPMC can also be used as a paste to replace natural materials, which can improve water retention and improve the bonding force with the substrate. As a plasticizer for latex coatings, it has a role in improving the performance and fluidity of coatings and putty powders. It has good effect on […]
Aplicação de HPMC no setor de construção
Cement mortar: improve the dispersibility of cement-sand, greatly improve the plasticity and water retention of mortar, and effectively prevent cracks and enhance the strength of cement. Tile cement: Improve the plasticity and water retention of the pressed tile mortar, improve the bonding force of the tiles, and prevent pulverization. Coating of refractory materials such as […]
Como é o HPMC de grau industrial?
The main use is as a dispersant in the production of polyvinyl chloride, and it is the main auxiliary agent for the preparation of PVC by suspension polymerization. In addition, it is used as thickener, stabilizer, emulsifier, excipient, water-retaining agent in the production of other petrochemicals, coatings, building materials, paint removers, agricultural chemicals, inks, textile […]
Principais usos do HPMC
Construction industry: As a water-retaining agent and retarder for cement mortar, it makes the mortar pumpable. Used as a binder in plastering paste, gypsum, putty powder or other building materials to improve spreadability and prolong operation time. It is used as a paste for ceramic tile, marble, plastic decoration, as a paste enhancer, and it […]
