Kedu ihe bụ hydroxypropyl methylcellulose sitere na?

Hydroxypropyl methylcellulose (HPMC) bụ sịntetik, polymer soluble mmiri nke sitere na cellulose. Ọ bụ uzuzu na-acha ọcha, enweghị isi, ntụ ntụ na-enweghị ụtọ nke a na-ejikarị dị ka ihe na-eme ka ọ dị arọ, emulsifier, ihe nkiri mbụ, na stabilizer n'ọtụtụ ụlọ ọrụ, gụnyere ọgwụ, nri, ihe ịchọ mma, na ihe owuwu.

A na-eme HPMC site na iji propylene oxide na methyl chloride meghachi omume cellulose. Cellulose bụ polysaccharide nke bụ isi akụkụ nke mgbidi mkpụrụ ndụ ihe ọkụkụ ma bụrụ ihe na-emepụta ihe na-emepụta ihe na ụwa. Propylene oxide bụ ngwakọta organic nwere usoro kemịkal CH3CHCH2O. Methyl chloride bụ gas na-enweghị agba, nke na-ere ọkụ nwere ísì ụtọ.

Mmeghachi omume nke cellulose na propylene oxide na methyl chloride na-eme ka e guzobe otu hydroxypropyl, nke a na-ejikọta na mkpụrụ ndụ cellulose. A maara usoro a dị ka hydroxypropylation. Ndị otu hydroxypropyl na-abawanye solubility nke cellulose na mmiri, na-eme ka ọ dị mfe iji na ngwa dị iche iche.

A na-eji HPMC eme ihe n'ọtụtụ ebe na ụlọ ọrụ na-emepụta ọgwụ dị ka ihe na-ekekọta, nke na-agbasasị, na onye nkwụsịtụ na mbadamba na capsules. A na-ejikwa ya dị ka thickener na emulsifier na ude na lotions, na dị ka ihe nkiri bụbu na anya tụlee. N'ụlọ ọrụ nri, a na-eji ya dị ka ihe na-agbapụta, stabilizer, na emulsifier na nri, akwa akwa, na ngwaahịa nri ndị ọzọ. N'ime ụlọ ọrụ na-ewu ụlọ, a na-eji ya dị ka ihe nkedo na ciment na ngwa agha, na ihe mkpuchi mmiri na-eguzogide mgbidi na ala.

HPMC bụ ihe nchekwa na anaghị egbu egbu nke US Food and Drug Administration (FDA) kwadoro maka iji na nri, ọgwụ na ihe ntecha. Ndị European Union (EU) kwadoro ya maka iji nri na ọgwụ.