Chemistry of METHOCEL™ Cellulose Ethers

METOSELE™ o se ituaiga o cellulose ethers na gaosia e le Dow. O nei cellulose ethers e maua mai i le cellulose, o se polymer masani o loʻo maua i totonu o puipui o laau. Ole kemisi ole METHOCEL ™ e aofia ai le suiga ole cellulose e ala ile etherification reactions. O ituaiga muamua ole METHOCEL™ e aofia ai le Hydroxypropyl Methylcellulose (HPMC) ma le Methylcellulose (MC), e tofu uma ma uiga fa'ama'i. Ole fa'amatalaga lautele lea ole kemisi ole METHOCEL™:

1. Hydroxypropyl Methylcellulose (HPMC):

• fausaga:
  • O le HPMC o se ether cellulose e mafai ona solu i le vai e lua mea e suitulaga ai: hydroxypropyl (HP) ma le methyl (M) vaega.
  • O vaega o le hydroxypropyl e fa'aalia ai le fa'aogaina o le hydrophilic, fa'aleleia le soluble vai.
  • O vaega methyl e saofagā i le solubility atoa ma faʻamalosia meatotino o le polymer.
• Tali fa'ateteina:
  • HPMC e gaosia e ala i le etherification o cellulose ma propylene oxide (mo vaega hydroxypropyl) ma methyl chloride (mo vaega methyl).
  • O tulaga o le tali e pulea lelei ina ia ausia le tikeri manaʻomia o le suitulaga (DS) mo vaega uma o le hydroxypropyl ma le methyl.
• Meatotino:
  • O le HPMC o lo'o fa'aalia ai le solubility lelei o le vai, mea e fai ai ata, ma e mafai ona tu'uina atu le fa'asao fa'atonutonu i mea tau vaila'au.
  • O le maualuga o le suitulaga e a'afia ai le viscosity o le polymer, taofi vai, ma isi mea.

2. Methylcellulose (MC):

• fausaga:
  • MC o se cellulose ether ma methyl substituents.
  • E tutusa ma le HPMC ae leai ni vaega hydroxypropyl.
• Tali fa'ateteina:
  • MC e gaosia e ala i le etherifying cellulose ma le methyl chloride.
  • O tulaga tali e pulea e ausia ai le tulaga manaomia o le suitulaga.
• Meatotino:
  • O le MC e solu vai ma e iai fa'aoga i vaila'au, faufale, ma mea'ai.
  • E faʻaaogaina e fai ma fusi, mafiafia, ma faʻamautu.

3. Meatotino masani:

• Suavai Solubility: HPMC ma MC e solu i le vai malulu, fausia vaifofo manino.
• Fuaina o Ata: E mafai ona latou faia ni ata fe'avea'i ma felagolagoma'i, e fa'aoga ai i fa'aoga eseese.
• Mafiafia: METHOCEL™ cellulose ethers e galue o ni mafiafia lelei, e fa'aaafia ai le viscosity o fofo.

4. Talosaga:

• Vailaau Fa'afomai: Fa'aaogaina i mea fa'apipi'i, fa'apipi'i, ma fa'atonu fa'asa'oloto.
• Fausiaina: Faʻaaogaina i sima, faʻapipiʻi taʻavale, ma isi mea faufale.
• Mea'ai: Fa'aaogaina e fai ma mafiafia ma fa'amautu i mea taumafa.
• Tausiga a le Tagata Lava Ia: Maua i mea teuteu, shampoos, ma isi mea tau le tagata lava ia.

O le kemisi o METHOCEL ™ cellulose ethers e maua ai mea faʻapitoa ma le tele o faʻaoga, e ofoina atu le puleaina o mea faʻaoga, taofi vai, ma isi uiga taua i faʻasologa eseese. O mea totino fa'apitoa e mafai ona fa'atulagaina e ala i le fetu'una'iga o le tulaga o le suitulaga ma isi fa'asologa o gaosiga.