He polysaccharide ka Cellulose e hana ana i nā ʻano ethers wai-soluble. ʻO nā mea hoʻomānoanoa Cellulose he mau polymers wai-soluble nonionic. He lōʻihi loa kona mōʻaukala hoʻohana, ʻoi aku ma mua o 30 mau makahiki, a he nui nā ʻano like ʻole. Hoʻohana mau ʻia lākou i loko o nā pena latex āpau a ʻo ia ke kumu nui o nā mea hoʻomānoanoa. He kūpono loa nā mea hoʻomānoanoa Cellulosic i nā ʻōnaehana wai no ka mea hoʻomānoanoa lākou i ka wai ponoʻī. I ka ʻoihana pena, ʻo nā mea hoʻomānoanoa cellulose i hoʻohana pinepine ʻia: methyl cellulose (MC), hydroxyethyl cellulose (HEC), ethyl hydroxyethyl cellulose (EHEC), hydroxypropyl cellulose (HPC), hydroxypropyl methyl cellulose (HPMC) a me ka hydrophobically modified hydroxyethyl cellulose (HMHEC). He polysaccharide wai-soluble ʻo HEC i hoʻohana nui ʻia i ka hoʻomānoanoa ʻana o nā pena latex matt a me semi-gloss. Loaʻa nā mea hoʻomānoanoa i nā ʻano viscosity like ʻole a he kūpono loa nā mea hoʻomānoanoa me kēia cellulose a me ke kūpaʻa mālama.
ʻO nā waiwai hoʻohālikelike, anti-splash, film-forming a me anti-sagging o ke kiʻiʻoniʻoni uhi e pili ana i ke kaumaha molekala pili o HEC. ʻO HEC a me nā polymers wai-soluble ʻē aʻe i pili ʻole e hoʻomānoanoa i ka pae wai o ka uhi. Hiki ke hoʻohana ʻia nā mea hoʻomānoanoa cellulose wale nō a i ʻole me nā mea hoʻomānoanoa ʻē aʻe e loaʻa ai ka rheology kūikawā. Hiki i nā ethers cellulose ke loaʻa nā kaumaha molekala pili like ʻole a me nā papa viscosity like ʻole, mai kahi hopena wai kaumaha molekala haʻahaʻa 2% me ka viscosity o kahi o 10 MPS a i kahi viscosity kaumaha molekala pili kiʻekiʻe o 100 000 MP.S. Hoʻohana pinepine ʻia nā papa kaumaha molekala haʻahaʻa ma ke ʻano he colloids pale i ka polymerization emulsion pena latex, a ʻo ka hapa nui o nā papa maʻamau (viscosity 4 800–50 000 MP·S) e hoʻohana ʻia ma ke ʻano he mea hoʻomānoanoa. ʻO ke ʻano o kēia ʻano mea hoʻomānoanoa ma muli o ka hydration kiʻekiʻe o nā pilina hydrogen a me ka entanglement ma waena o kona mau kaulahao molekala.
ʻO ka cellulose kuʻuna kahi polymer kaumaha molekala kiʻekiʻe e mānoanoa nui ana ma o ka hihia ma waena o nā kaulahao molekala. Ma muli o ke kiʻekiʻe o ka viscosity ma ka wikiwiki shear haʻahaʻa, ʻaʻole maikaʻi ka waiwai leveling, a hoʻopilikia ia i ka ʻōlinolino o ke kiʻi uhi. I ka wikiwiki shear kiʻekiʻe, haʻahaʻa ka viscosity, ʻaʻole maikaʻi ke kūpaʻa splash o ke kiʻi uhi, a ʻaʻole maikaʻi ka piha o ke kiʻi uhi. ʻO nā ʻano noi o HEC, e like me ke kūpaʻa palaki, ka hoʻopaʻa kiʻiʻoniʻoni a me ka roller spatter, pili pono i ke koho ʻana o ka thickener. Eia kekahi, ʻo kona mau waiwai kahe e like me ke kūpaʻa leveling a me ke kūpaʻa sag e hoʻopilikia nui ʻia e nā thickeners.
ʻO ka cellulose i hoʻololi ʻia me ka hydrophobically (HMHEC) kahi mea hoʻomānoanoa cellulose nona ka hoʻololi hydrophobic ma kekahi mau kaulahao lālā (ua hoʻokomo ʻia kekahi mau hui alkyl kaulahao lōʻihi ma ke kaulahao nui o ke ʻano). ʻOi aku ka viscosity o kēia uhi ma nā wikiwiki shear kiʻekiʻe a no laila ʻoi aku ka maikaʻi o ka hoʻokumu ʻana i ka kiʻiʻoniʻoni. E like me Natrosol Plus Grade 330, 331, Cellosize SG-100, Bermocoll EHM-100. Ua like kona hopena hoʻomānoanoa me nā mea hoʻomānoanoa cellulose ether me ka nui o ka molekala pili nui. Hoʻomaikaʻi ia i ka viscosity a me ka pae ʻana o ICI, a hoʻemi i ka ʻili o ka ʻili. No ka laʻana, ʻo ka ʻili o HEC ma kahi o 67 MN/m, a ʻo ka ʻili o HMHEC he 55 ~ 65 MN/m.
Loaʻa iā HMHEC ka hiki ke pīpī maikaʻi loa, anti-sagging, nā waiwai leveling, ka ʻōlinolino maikaʻi a me ka anti-pigment caking. Hoʻohana nui ʻia a ʻaʻohe hopena maikaʻi ʻole i ka hoʻokumu ʻana o ka ʻili o nā pena latex liʻiliʻi. Hana maikaʻi ka hana ʻili a me ka hana anti-corrosion. Hana maikaʻi kēia mea hoʻomānoanoa pili me nā ʻōnaehana vinyl acetate copolymer, a ua like kāna hana me nā mea hoʻomānoanoa pili ʻē aʻe, akā me nā ʻano hana maʻalahi.
Ka manawa hoʻouna: Malaki-16-2023