Ka hoʻohana ʻana o ka hydroxyethyl cellulose i loko o ka pena latex

Pono ka mea hoʻomānoanoa no ka pena latex e kūlike maikaʻi me ka hui polymer emulsion, inā ʻaʻole e loaʻa i ka ʻili uhi kahi liʻiliʻi o ka reticulate, a e hana i ka hoʻohuihui ʻāpana irreversible, kahi e hōʻemi ai i ka viscosity a hoʻomānoanoa i ka nui o ka ʻāpana. E hoʻololi ka mea hoʻomānoanoa i ka uku o ka emulsion. No ka laʻana, e loaʻa i ka mea hoʻomānoanoa cationic kahi hopena irreversible ma ka emulsifier anionic e uhaʻi i ka emulsion. Pono ka mea hoʻomānoanoa kūpono no ka pena latex i nā waiwai penei:

1. Haʻahaʻa ka nui a me ka mānoanoa maikaʻi

2. Paʻa maikaʻi ka mālama ʻana, ʻaʻohe hōʻemi ʻana o ka viscosity ma muli o ka hana a nā enzymes, a ʻaʻohe hōʻemi ʻana o ka viscosity ma muli o nā loli o ka mahana a me ka waiwai PH

3, mālama wai maikaʻi, ʻaʻohe hanana pehu maopopo

4. ʻAʻohe hopena ʻaoʻao ma nā waiwai kiʻiʻoniʻoni e like me ke kūpaʻa ʻana i ka scrub, ka gloss, ka mana hūnā a me ke kūpaʻa wai

5. ʻAʻohe flocculation pigment

ʻO ka ʻenehana hoʻomānoanoa o ka pena latex he ana koʻikoʻi ia e hoʻomaikaʻi i ka maikaʻi o ka latex a hoʻemi i ke kumukūʻai. ʻO ka Hydroxyethyl cellulose kahi mea hoʻomānoanoa kūpono, nona nā hopena multifunctional i ka hoʻomānoanoa, ka hoʻopaʻa ʻana a me ka hoʻoponopono rheological o ka pena latex.

I ke kaʻina hana o ka pena latex,hydroxyethyl cellulose (HEC)Hoʻohana ʻia ia ma ke ʻano he mea hoʻolaha, mea hoʻomānoanoa a me ka mea hoʻokuʻu pigment e hoʻopaʻa i ka viscosity o ka huahana, e hōʻemi i ka agglomeration, e hana i ka ʻili pena i maʻalahi a palupalu, a e hoʻoikaika hoʻi i ka pena latex. He rheology maikaʻi, hiki ke kū i ka ikaika shear kiʻekiʻe, a hiki ke hāʻawi i ka pae maikaʻi, ke kū'ē ʻana i ke kahakaha a me ke kūlike o ka pigment. I ka manawa like, loaʻa iā HEC ka hana maikaʻi loa, a ʻo ka pena latex i hoʻomānoanoa ʻia me HEC he pseudoplasticity, no laila ʻo nā ʻano hana e like me ka palaki ʻana, ka ʻōwili ʻana, ka hoʻopiha ʻana, a me ka pīpī ʻana he mau pono o ka mālama ʻana i ka hana, ʻaʻole maʻalahi ke hoʻomaʻemaʻe a me ka sag, a emi ka splashing. Loaʻa iā HEC ka hoʻomohala kala maikaʻi loa. Loaʻa iā ia ka miscibility maikaʻi loa me ka hapa nui o nā colorants a me nā mea hoʻopaʻa, e hiki ai ke hana i nā pena latex me ke kūlike kala maikaʻi loa a me ke kūpaʻa. ʻO ka versatility i hoʻopili ʻia i ka formulation, he non-ionic ether ia. No laila, hiki ke hoʻohana ʻia i kahi laulā pH ākea (2 ~ 12), a hiki ke hui pū ʻia me nā ʻāpana o nā pena latex maʻamau e like me nā pigments reactive, nā mea hoʻohui, nā paʻakai soluble a i ʻole electrolytes.

ʻAʻohe hopena maikaʻi ʻole ma ke kiʻi uhi. No ka mea, he ʻano ʻike maopopo ka wai o ka wai HEC, ʻaʻole maʻalahi ka huʻa i ka wā o ka hana ʻana a me ke kūkulu ʻana, a ʻoi aku ka liʻiliʻi o ke ʻano o nā lua pele a me nā lua pin.

Paʻa maikaʻi ka mālama ʻana. I ke kaʻina hana mālama lōʻihi, hiki ke mālama ʻia ka hoʻopuehu ʻana a me ka hoʻokuʻu ʻana o ka pigment, a ʻaʻohe pilikia o ke kala lana a me ka pua ʻana. Ke liʻiliʻi ka papa wai ma luna o ka ʻili pena a loli nui ka mahana o ka mālama ʻana. Paʻa mau kona mānoanoa.

Hiki i ka HEC ke hoʻonui i ka waiwai PVC (pigment volume concentration) solid composition a hiki i ka 50-60%. Eia kekahi, hiki i ka topcoat thickener o ka pena wai ke hoʻohana pū i ka HEC.

I kēia manawa, ʻo nā mea hoʻomānoanoa i hoʻohana ʻia i nā pena latex kiʻekiʻe o ka home he HEC a me nā polymers acrylic i lawe ʻia mai (me nā polyacrylates, homopolymer a i ʻole copolymer emulsion thickeners o ka acrylic acid a me ka methacrylic acid) thickeners.

Hiki ke hoʻohana ʻia ka Hydroxyethyl cellulose no nā hana

1. Ma ke ʻano he mea hoʻoheheʻe a pale paha

Ma keʻano laulā, hoʻohana ʻia ka HEC me ka mānoanoa o 10 a 30 mPaS. Hiki ke hoʻohana ʻia ka HEC a hiki i ka 300mPa·S me ka hui pū ʻana me nā surfactants anionic a cationic paha, a ʻoi aku ka maikaʻi o ka hopena hoʻopuehu. ʻO ka nui o ka kuhikuhi he 0.05% o ka nui o ka monomer.

2, ma ke ʻano he mea hoʻomānoanoa

E hoʻohana i ka 15000mPa. ʻO ka nui kuhikuhi o ka HEC viscosity kiʻekiʻe ma luna o s he 0.5 a 1% o ka nuipa holoʻokoʻa o ka uhi latex, a hiki i ka waiwai PVC ke hiki i kahi 60%. I loko o ka pena latex, hoʻohana ʻia ka HEC ma kahi o 20Pa,s, a ʻo nā ʻano like ʻole o ka pena latex ka mea maikaʻi loa. ʻOi aku ka haʻahaʻa o ke kumukūʻai o ka hoʻohana wale ʻana iā HEC ma luna o 30000Pa.s. Eia naʻe, ʻaʻole maikaʻi ka pae ʻana a me nā ʻano ʻē aʻe o ka pena latex. Mai ka manaʻo o nā koi maikaʻi a me ka hoʻemi ʻana i ke kumukūʻai, ʻoi aku ka maikaʻi o ka hoʻohana pū ʻana i ka HEC viscosity waena a me ke kiʻekiʻe.

3. Ke ʻano hoʻokomo ʻana i ka pena latex

Hiki ke hoʻohui ʻia ka HEC i mālama ʻia ma ka ʻili ma ke ʻano pauka maloʻo a i ʻole ka slurry. Hoʻohui pololei ʻia ka pauka maloʻo i ka wili ʻana o ka pigment. Pono ka pH o ke kiko hoʻohui he 7 a i ʻole ka haʻahaʻa. Hiki ke hoʻohui ʻia nā ʻāpana alkaline e like me nā mea hoʻolaha ma hope o kaHECua pulu ʻia a hoʻopuehu piha ʻia. Pono e hoʻohui ʻia ka slurry i hana ʻia me HEC i loko o ka slurry ma mua o ka loaʻa ʻana o ka manawa kūpono o ka HEC e hoʻomaʻū a hoʻomānoanoa i kahi kūlana hiki ʻole ke hoʻohana ʻia. Hiki ke hoʻomākaukau ʻia nā slurries HEC me nā mea hoʻohuihui glycol-based.

4. Anti-mildew o ka pena latex

Hoʻoheheʻe ʻia ka HEC wai-hoʻoheheʻe ʻia i ka wai ke hōʻike ʻia i nā ʻōpala e pili pono ana i ka cellulose a me kāna mau mea i loaʻa. ʻAʻole lawa ka hoʻohui ʻana i nā mea mālama i ka pena wale nō, pono e ʻole ka enzyme i nā ʻāpana āpau. Pono e mālama ʻia nā kaʻa hana o ka pena latex i ka maʻemaʻe a me ka hoʻomaʻemaʻe ʻia, a pono e hoʻomaʻemaʻe mau ʻia nā lako āpau me ka mahu 0.5% formalin a i ʻole 0.1% mercury solution.