4 Basic Production Technologies thiab Formulas ntawm HPMC, Tsis txhob ploj!

Hydroxypropyl methylcellulose (HPMC) yog ntau yam polymer uas tau siv dav hauv ntau lub lag luam, suav nrog kev tsim kho, tshuaj, thiab kev lag luam zaub mov. HPMC yog tsim los siv ntau yam khoom siv thev naus laus zis thiab cov qauv tsim, nyob ntawm daim ntawv thov npaj. Hauv tsab xov xwm no, peb yuav tshawb txog plaub lub tswv yim tsim khoom thiab cov qauv ntawm HPMC uas koj yuav tsum tsis txhob nco.

1. Etherification Technology Lub tshuab etherification yog cov cuab yeej siv ntau tshaj plaws rau HPMC. Hauv cov txheej txheem no, cellulose raug kho nrog alkali, xws li sodium hydroxide, los tsim alkali cellulose. Tom qab ntawd cov alkali cellulose yog reacted nrog propylene oxide thiab methyl chloride los ua HPMC. Qib ntawm kev hloov pauv (DS) ntawm HPMC tuaj yeem tswj tau los ntawm kev kho qhov sib piv ntawm propylene oxide rau methyl chloride thaum lub sij hawm cov tshuaj tiv thaiv.

Cov mis rau HPMC tsim siv etherification technology yog:

Cellulose + Alkali → Alkali Cellulose Alkali Cellulose + Propylene Oxide + Methyl Chloride → HPMC

2. Spray Drying Technology Lub tshuab ziab khaub ncaws yog cov cuab yeej siv ntau tshaj plaws rau HPMC. Nyob rau hauv cov txheej txheem no, cellulose yog yaj nyob rau hauv ib tug alkali tov thiab ces reacted nrog propylene oxide thiab methyl chloride. Cov txiaj ntsig HPMC cov tshuaj yog tom qab ntawd txau kom qhuav los tsim HPMC hmoov.

Cov mis rau HPMC tsim siv tshuab ziab khaub ncaws yog:

Cellulose + Alkali → Alkali Cellulose Alkali Cellulose + Propylene Oxide + Methyl Chloride → HPMC Solution HPMC Solution + Spray Drying → HPMC Powder

3. Suspension Polymerization Technology Lub suspension polymerization tshuab yog lwm cov tshuab tsim khoom rau HPMC. Nyob rau hauv cov txheej txheem no, cellulose raug tshem tawm nyob rau hauv ib tug hnyav thiab ces reacted nrog propylene oxide thiab methyl chloride nyob rau hauv lub xub ntiag ntawm ib tug polymerization pib los tsim HPMC.

Cov mis rau HPMC uas tsim los ntawm kev siv cov txheej txheem suspension polymerization yog:

Cellulose + Solvent + Polymerization Initiator → Cellulose Suspension Cellulose Suspension + Propylene Oxide + Methyl Chloride → HPMC

4. Solution Polymerization Technology Cov tshuaj polymerization tshuab yog ib qho tshiab siv tshuab rau HPMC. Nyob rau hauv cov txheej txheem no, cellulose yog yaj nyob rau hauv ib tug hnyav thiab ces reacted nrog propylene oxide thiab methyl chloride nyob rau hauv lub xub ntiag ntawm ib tug polymerization pib tsim HPMC.

Cov mis rau HPMC tsim siv cov tshuaj polymerization tshuab yog:

Cellulose + Solvent + Polymerization Initiator → Cellulose Solution Cellulose Solution + Propylene Oxide + Methyl Chloride → HPMC

Nyob rau hauv xaus, HPMC yog ib tug ntau yam polymer uas yog tsim los siv ntau yam technologies thiab formulations, nyob ntawm seb lub hom phiaj daim ntawv thov. Plaub cov thev naus laus zis thiab cov qauv ntawm HPMC suav nrog etherification thev naus laus zis, tshuaj tsuag kom qhuav tshuab, ncua kev siv tshuab polymerization, thiab kev daws teeb meem polymerization technology. Nkag siab txog cov cuab yeej tsim khoom thiab cov qauv ntawm HPMC tuaj yeem pab cov tuam txhab xaiv cov khoom HPMC txoj cai rau lawv cov ntawv thov tshwj xeeb.