ʻO ka mānoanoa no ka pena latex pono e hoʻohālikelike maikaʻi me ka hui polymer emulsion, i ʻole e loaʻa i ke kiʻi uhi ka liʻiliʻi o ka reticulate, a e hana i ka agglomeration particle irreversible, e hōʻemi i ka viscosity a coarsen i ka nui o ka ʻāpana. Na ka mānoanoa e hoʻololi i ka uku o ka emulsion. No ka laʻana, e loaʻa i ka mānoanoa cationic kahi hopena hiki ʻole ke hoʻololi i ka emulsifier anionic e wāwahi i ka emulsion. ʻO ka mānoanoa kūpono no ka pena latex pono e loaʻa nā waiwai penei:
1. Haʻahaʻa haʻahaʻa a me ka viscosity maikaʻi
2. ʻO ke kūpaʻa mālama maikaʻi, ʻaʻohe hōʻemi viscosity ma muli o ka hana o nā enzymes, a ʻaʻohe hōʻemi viscosity ma muli o nā loli i ka mahana a me ka waiwai PH
3, ka mālama ʻana i ka wai maikaʻi, ʻaʻohe mea e ʻike ʻia ai ka ʻōpū
4. ʻAʻohe hopena ʻaoʻao ma nā waiwai kiʻiʻoniʻoni e like me ke kūpaʻa scrub, gloss, huna mana a me ka pale wai
5. ʻAʻohe puaʻa puaʻa
ʻO ka ʻenehana mānoanoa o ka pena latex kahi mea nui e hoʻomaikaʻi ai i ka maikaʻi o ka latex a hoʻemi i ke kumukūʻai. ʻO ka Hydroxyethyl cellulose kahi mānoanoa kūpono, nona nā hopena multifunctional i ka mānoanoa, stabilization a me ka hoʻoponopono rheological o ka pena latex.
I ke kaʻina hana o ka pena latex,hydroxyethyl cellulose (HEC)hoʻohana ʻia e like me ka mea hoʻopuehu, mānoanoa a me ka pigment suspending agent e hoʻopaʻa i ka viscosity o ka huahana, e hōʻemi i ka agglomeration, e hoʻomaʻamaʻa i ke kiʻi pena a maʻalahi hoʻi, a ʻoi aku ka lōʻihi o ka pena latex. ʻO ka rheology maikaʻi, hiki ke kū i ka ikaika shear kiʻekiʻe, a hiki ke hāʻawi i ka pae maikaʻi, ka pale ʻana a me ka like ʻana o ka puaʻa. I ka manawa like, he hana maikaʻi loa ka HEC, a ʻo ka pena latex i mānoanoa me HEC he pseudoplasticity, no laila, ʻo nā ʻano hana e like me ka pulupulu, ka ʻōwili ʻana, ka hoʻopiha ʻana, a me ka pīpī ʻana i nā mea maikaʻi o ka mālama ʻana i ka hana, ʻaʻole maʻalahi e hoʻomaʻemaʻe a sag, a emi ʻole ka splashing. He hoʻomohala kala maikaʻi loa ka HEC. Loaʻa iā ia ka miscibility maikaʻi loa me ka hapa nui o nā kala a me nā mea hoʻopaʻa, e hiki ai ke hoʻokumu i nā pena latex me ke kūlike o ka waihoʻoluʻu maikaʻi a me ka paʻa. ʻO ka versatility i hoʻohana ʻia i ka hoʻokumu ʻana, he ether non-ionic. No laila, hiki ke hoʻohana ʻia i kahi ākea pH ākea (2 ~ 12), a hiki ke hoʻohui ʻia me nā ʻāpana o nā pena latex maʻamau e like me ka reactive pigments, additives, soluble salts a electrolytes.
ʻAʻohe hopena maikaʻi ʻole i ke kiʻi uhi. No ka mea he mau hiʻohiʻona o ka ʻili wai o ka HEC aqueous solution, ʻaʻole maʻalahi ka huʻa i ka wā o ka hana ʻana a me ke kūkulu ʻana, a ʻoi aku ka liʻiliʻi o nā lua pele a me nā pinholes.
Paʻa mālama maikaʻi. Ma ke kaʻina hana mālama lōʻihi, hiki ke mālama ʻia ka dispersibility a me ka hoʻokuʻu ʻana o ka puaʻa, ʻaʻohe pilikia o ka waihoʻoluʻu a me ka pua. Ke liʻiliʻi ka papa wai ma ka ʻili pena a hoʻololi nui ka mahana mālama. Paʻa mau kona viscosity.
Hiki i ka HEC ke hoʻonui i ka waiwai PVC (pigment volume concentration) solid composition a hiki i 50-60%. Eia kekahi, hiki ke hoʻohana i ka HEC i ka mānoanoa topcoat o ka pena wai.
I kēia manawa, lawe ʻia nā mānoanoa i hoʻohana ʻia i nā pena latex kiʻekiʻe kiʻekiʻe he HEC a me nā polymers acrylic (me nā polyacrylates, homopolymer a i ʻole copolymer emulsion mānoanoa o ka waikawa acrylic a me ka waikawa methacrylic) mānoanoa.
Hiki ke hoʻohana ʻia ka Hydroxyethyl cellulose no
1. Ma keʻano he dispersant a iʻole ke kāpili pale
ʻO ka maʻamau, hoʻohana ʻia ʻo HEC me kahi viscosity o 10 a 30 mPaS. Hiki ke hoʻohana ʻia ka HEC a hiki i 300mPa·S i hui pū me nā mea hoʻoheheʻe anionic a i ʻole cationic, a ʻoi aku ka maikaʻi o ka hopena dispersion. He 0.05% ka nui o ka nui o ka monomer.
2, ma ke ʻano he mānoanoa
E hoʻohana i ka 15000mPa. ʻO ka helu kuhikuhi o ka HEC kiʻekiʻe-viscosity ma luna o s he 0.5 a 1% o ka nui o ka nui o ka uhi latex, a hiki i ka waiwai PVC ke hiki i ka 60%. I loko o ka pena latex, hoʻohana ʻia ka HEC ma kahi o 20Pa, s, a ʻo nā waiwai like ʻole o ka pena latex ʻoi aku ka maikaʻi. ʻO ke kumukūʻai o ka hoʻohana wale ʻana iā HEC ma luna o 30O00Pa.s he haʻahaʻa. Eia naʻe, ʻaʻole maikaʻi ka pae ʻana a me nā ʻano ʻē aʻe o ka pena latex. Mai ka hiʻohiʻona o nā koi o ka maikaʻi a me ka hōʻemi ʻana i ke kumukūʻai, ʻoi aku ka maikaʻi o ka hoʻohana pū ʻana me HEC viscosity kiʻekiʻe.
3. ʻO ke ʻano hoʻohui i ka pena latex
Hiki ke hoʻohui ʻia ka HEC i mālama ʻia i ka ʻili i ka pauka maloʻo a i ʻole ke ʻano slurry. Hoʻopili pololei ʻia ka pauka maloʻo i ka wili puaʻa. Pono ka pH o ka helu hoʻohui i 7 a i ʻole. Hiki ke hoʻohui ʻia nā ʻāpana alkaline e like me nā dispersants ma hope o kaHECua pulu a hoopuehu loa ia. Pono e hui ʻia ka slurry i hana ʻia me HEC i loko o ka slurry ma mua o ka lawa ʻana o ka manawa o ka HEC e hoʻomaʻemaʻe a mānoanoa i kahi kūlana hiki ʻole ke hoʻohana. Hiki ke hoʻomākaukau ʻia nā slurries HEC me nā mea hana coalescing e pili ana i ka glycol.
4. Anti-mildew o ka pena latex
Hiki ke hoʻoheheʻe ʻia ka HEC i ka wai i ka wā e ʻike ʻia ai i nā poni e pili ana i ka cellulose a me kāna mau mea. ʻAʻole lawa ka hoʻohui ʻana i nā preservatives i ka pena wale nō, pono nā ʻāpana āpau i ka enzyme manuahi. Pono e hoʻomaʻemaʻe ʻia nā kaʻa hana o ka pena latex, a e hoʻomaʻemaʻe mau ʻia nā mea hana a pau me ka mahu 0.5% formalin a i ʻole 0.1% mercury solution.
Ka manawa hoʻouna: Apr-25-2024