Sezvo hunhu hwehydroxypropyl methylcellulose hwakafanana nedzimwe ethers dzinonyungudika mumvura, inogona kushandiswa mu emulsion coatings uye mu water-soluble resin coatings components semushonga wekugadzira firimu, thickener, emulsifier uye stabilizer, nezvimwewo, izvo zvinoita kuti firimu re coatings rirambe zvakanaka. Homogeneous coatment uye adhesion, uye kunatsiridza surface tension, kugadzikana kune acids uye bases, uye compatibility nemetal pigments.
Sezvo HPMC ine gel point yakakwira kupfuura MC, inodzivirirawo kurwiswa nemabhakitiriya kupfuura mamwe ma cellulose ethers, saka inogona kushandiswa sechinhu chinosimbisa kukora kwe emulsion coatings yemvura. HPMC ine kugadzikana kwakanaka kwekuchengetera viscosity uye inogona kupararira zvakanaka, saka HPMC inonyanya kukodzera se dispersant mu emulsion coatings.
Kushandiswa kwehydroxypropyl methyl cellulose muindasitiri yekuputira ndekwekuti:
1. Kupisa kwakasiyana-siyana kweHPMC configuration kuramba kupfeka pendi, kuramba kupisa kwakanyanya, tsananguro yekurwisa mabhakitiriya, kuramba kugeza uye kugadzikana kune acids uye mabhesi zviri nani; inogona zvakare kushandiswa semuchina wekubvisa pendi une methanol, ethanol, propanol, isopropyl alcohol, ethylene glycol, acetone, methyl ethyl ketone kana diketone alcohol thickener; HPMC yakagadzirwa emulsified coatings ine abrasion yakanaka yemvura; HPMC kupfuura HEC neEHEC neCMC sezvo HPMC ine simba riri nani kupfuura HEC neEHEC neCMC semuchina wekupenda.
2. Hydroxypropyl methyl cellulose inotsiviwa zvakanyanya ine simba rekudzivirira kurwiswa nemabhakitiriya pane inotsiviwa zvishoma, uye ine simba rekudzivirira kusimba mu polyvinyl acetate thickeners. Mamwe ma cellulose ethers ari mudura nekuda kwekuora kwe cellulose ether uye kunoita kuti coating viscosity iderere.
3. pendi inobvisa pendi inogona kunyungudika mumvura (kana methoxy iri 28% kusvika 32%, hydroxypropoxy iri 7% kusvika 12%), dioxymethane, toluene, paraffin, ethanol, methanol configuration, ichaiswa panzvimbo yakamira, ine viscosity inodiwa uye volatility. Pendi iyi inobvisa pendi dzemazuva ano dzespray, varnishes, enamel, uye mamwe epoxy esters, epoxy amides, catalyzed epoxy amides, acrylates, nezvimwewo. Mapendi mazhinji anogona kubviswa mumasekonzi mashoma, mamwe mapendi anoda 10 ~ 15min kana kupfuura, pendi iyi inonyanya kukodzera nzvimbo dzehuni.
4. Pendi yemvura inogona kuumbwa nezvikamu zana zvepigment isina kugadzirwa kana kuti yeorganic, zvikamu 0.5 ~ 20 zvealkyl cellulose inonyungudika mumvura kana hydroxyalkyl cellulose uye zvikamu 0.01 ~ 5 zvepolyoxyethylene ether kana ether ester. Semuenzaniso, dhayi inowanikwa nekusanganisa zvikamu 1.5 zveHPMC, zvikamu 0.05 zvepolyethylene glycol alkyl phenyl ether, zvikamu 99.7 zvetitanium dioxide uye zvikamu 0.3 zvecarbon black. Musanganiswa wacho unozosanganiswa nezvikamu zana zve50% solid polyvinyl acetate kuti pave nejira, uye hapana musiyano pakati pefirimu rejira rakaoma rinoumbwa nekuriisa pabepa gobvu uye kurikwesha zvishoma nebhurashi.
Nguva yekutumira: Chivabvu-20-2022