Etu esi etinye HEC nke ọma na Paint Latex?

Hydroxyethyl cellulose (HEC) bụ ihe a na-ejikarị nonionic thickener na rheology modifier na agba latex. Ọ na-eme ka nhazi nke viscosity dịkwuo mma, nhazi ọkwa, nkwụsi ike nchekwa, na arụ ọrụ mgbochi nke usoro. Ịtinye HEC nke ọma na ụdị agba latex ọ bụghị naanị na-emetụta ọnụ ahịa ngwaahịa kamakwa ọ na-emetụta àgwà eserese na ngwa ngwa. Ihe na-esonụ na-enye nkọwa nhazi usoro site na akụkụ anọ: nhọrọ, usoro onunu ogwu, usoro mgbakwunye, na nlezianya.

1. Ịhọrọ ọkwa viscosity kwesịrị ekwesị dabere na ụdị eserese Latex

1.1. Agba Latex mgbidi dị n'ime ime (akụ na ụba/ụdị ọkọlọtọ)

A na-atụ aro ka iji viscosity ọkara na elu HEC nwere viscosity nke 30,000.-60,000mPa·s. Ya uru na-agụnye elu ndim arụmọrụ, ezi na-eri-irè, na ike izute leveling na thixotropic chọrọ nke ot ime mgbidi agba.

1.2. Agba mgbidi ime ụlọ dị elu (Matte, Satin)

Ngwaahịa dị elu nwere viscosity nke 60,000-100,000mPa·Enwere ike ịhọrọ s, na-eme ka ọ dị nro, nke siri ike karị na mma mgbochi splatter n'oge ngwa.

1.3. Agba Latex Mpụga Mpụga

Iji melite mgbochi sagging na mmiri na-eguzogide, ọkara viscosity HEC (30,000-60,000mPa·s) a na-ejikarị eme ihe, na-ejikọta ya na cellulose ethers ma ọ bụ PU thickeners iji nweta ike mkpụrụ kacha mma na nkwụsi ike nchekwa.

1.4. Sistemụ PVC dị elu (Paintsdị ụdị Putty)

A na-achọrọ HEC arụmọrụ dị elu iji hụ na iguzosi ike n'ezi ihe ma gbochie nhazi na nkewa.

N'ozuzu, nhọrọ nke viscosity ọkwa kwesịrị itule ndim mmetụta, ego, na ngwa arụmọrụ; elu viscosity adịghị mma mgbe niile.

2. Njikwa ezi uche nke mgbakwunye HEC

2.1. 0.2%-0.6% (dabere na ngwaahịa emechara)

Agba mgbidi nkịtị na-ejikarị 0.25%-0.40%, ebe mkpuchi dị elu ma ọ bụ sistemụ PVC dị elu nwere ike iru gburugburu 0.5%.

2.2. Ekwesịrị ịhazigharị ego mgbakwunye ntakịrị dabere n'ihe ndị a:

Ngwunye pigmenti na njuputa na uru PVC: Ka PVC dị elu, a na-achọkwu HEC.

Ụdị Emulsion: Emulsions nwere oke dị elu nke ihe ndị na-emepụta ihe nkiri na njikọ siri ike na-achọ ka ọ dị ntakịrị ntakịrị.

Viscosity ebumnuche: Ụzọ ngwa dị iche iche na-ebute nnukwu ọdịiche na viscosity achọrọ.

Ndakọrịta na ndị ọzọ thickeners: Ọ bụrụ na ejikọtara na HEUR, ASE, wdg, na HEC onunu ogwu nwere ike belata n'ụzọ kwesịrị ekwesị.

REasonable HEC usoro onunu kwesiri iru: viscosity static agafeghị oke, nkwụsi ike sistemu, enweghị mgbasa n'oge ngwa, yana mmetụta ịhịa aka n'ahụ.

3. Ụzọ mgbakwụnye na mgbasa ziri ezi

3.1. Ụzọ Ngwọta Ngwaahịa akwadoburu (A kwadoro)

Kwadebe uzo, viscous ngwọta nke HEC na oke nke 1:20-1:40 tupu ịtinye ya na usoro agba latex. Uru:

Mgbasa nke ọma, enweghị ihe irighiri anya azụ

Na-akwado nlegharị anya nke ọma viscosity

Na-ezere mmetụta thickening mpaghara na emulsion

Ekwesịrị ịgbaze ngwaahịa ngwaahịa 1-2 awa tupu.

3.2. Ụzọ mgbakwunye ntụ ntụ ozugbo (chọrọ njikwa siri ike)

Ọ bụrụ na mgbakwunye akọrọ akọrọ dị mkpa, soro ntuziaka ndị a:

Jiri nwayọọ nwayọọ wụsa n'ime ya ka ị na-agbasa n'ọsọ dị elu iji gbochie ịchịkọta

Tinye n'oge aqueous oge, igbari kpamkpam tupu agbakwunyere na emulsion

Oge mgbasa ozi ekwesịghị ịbụ ihe na-erughị 20-Nkeji 30

Tinye ihe na-ebute mmiri mmiri ma ọ bụ jiri HEC na-agbaze ngwa ngwa ma ọ bụrụ na ọ dị mkpa iji belata nkwụsịtụ.

4. Usoro maka Optimizing System Rheological mmetụta

4.1. Jiri HEUR/ASE mee ihe

Usoro jikọtara ọnụ na-eme ka thixotropy dịkwuo mma, na-eme ka ihe mgbochi na-eme ka ọ dị elu ma na-eme ka ngwa dị nro.

4.2. Njikwa pH na usoro nchekwa

HEC na-arụ ọrụ kacha mma na pH nke 7-11; oke acidity nwere ike belata viscosity ngwa ngwa. Ụfọdụ ihe nchekwa nwere ike imetụta ọnụego mgbasa nke HEC.

4.3. Nchekwa kwụsie ike njikwa

N'oge nchekwa ogologo oge na oke okpomọkụ, nnukwu viscosity HEC nwere ike ịnweta mbelata na viscosity. Ya mere, enwere ike ịhọrọ ngwaahịa ndị a gbanwere n'elu.

4.4. Na-egbochi ịba ụba nke ụgha na ịkwa akwa

Mgbe emechara viscosity ebumnuche n'ime nhazi ahụ, a ga-eme nnwale ịhịa aka n'ahụ, ịhịa aka n'ahụ na ịsagharị. Ekwesịrị idozigharị oke HEC nke ọma iji hụ na mmetụta ngwa na-agbanwe agbanwe.

Ihe mgbakwunye kwesịrị ekwesị nkeHEC ka agba latex chọrọ nleba anya zuru oke nke nhọrọ ọkwa viscosity, njikwa usoro onunu ogwu, usoro mgbasa, na njikarịcha usoro nhazi rheological. Ịhọrọ HEC ziri ezi na iji ya mee ihe n'ụzọ ziri ezi ọ bụghị nanị na-eme ka arụ ọrụ na ọdịdị dị mma nke agba ahụ dịkwuo mma kamakwa ọ na-eme ka nkwụsi ike nchekwa na ọkwa ngwaahịa, na-eme ka ọ bụrụ akụkụ dị mkpa nke imeziwanye mma agba latex.