Mokhoa oa ho kenya HEC ka nepo ho Latex Paint?

Hydroxyethyl cellulose (HEC) ke nonionic thickener e sebelisoang ka ho fetisisa le mofetoleli oa rheology penteng ea latex. E ntlafatsa ka katleho sebopeho sa viscosity, thepa ea boemo bo holimo, botsitso ba polokelo, le ts'ebetso ea anti-splatter ea sistimi. Ho kenyelletsa HEC ka nepo ho lipente tsa latex ha ho ame litšenyehelo tsa sehlahisoa feela empa hape ho ama ka kotloloho boleng ba filimi ea pente le maikutlo a kopo. Lintlha tse latelang li fana ka tlhaloso e hlophisitsoeng ho tsoa likarolong tse 'nè: khetho, litekanyetso, mokhoa oa ho eketsa, le litemoso.

1. Ho Khetha Kereiti e Loketseng ea Viscosity e Thehiloeng ho Mofuta oa Pente ea Latex

1.1. Ka hare Wall Latex Pente (Moruo/Mofuta o Tloaelehileng)

Ho khothalletsoa ho sebelisa HEC e nang le viscosity e bohareng ho isa holimo e nang le viscosity ea 30,000.-60,000 mPa·s. Melemo ea eona e kenyelletsa ts'ebetso e phahameng ea botenya, ts'ebeliso e ntle ea litšenyehelo, le bokhoni ba ho fihlela litlhoko tsa boemo bo holimo le tsa thixotropic tsa lipente tse tloaelehileng tsa ka hare.

1.2. Lipente tsa boleng bo holimo tsa ka Hare-hare (Matte, Satin)

Lihlahisoa tse phahameng tsa viscosity tse nang le viscosity ea 60,000-100,000 mPa·s e ka khethoa, e hlahisang qetello e boreleli, e teteaneng le thepa e ntle ea anti-splatter nakong ea kopo.

1.3. Lipente tsa Latex tsa Kantle tsa lebota

Ho ntlafatsa anti-sagging le ho hanyetsa metsi, viscosity e mahareng HEC (30,000-60,000 mPa·s) hangata e sebelisoa, hangata e kopantsoe le cellulose ethers kapa PU thickeners ho fumana matla a betere a chai le botsitso ba polokelo.

1.4. Litsamaiso tse Phahameng tsa PVC (Lipente tsa Latex tsa mofuta oa Putty)

Ho hlokahala li-HEC tse matla haholo ho netefatsa botšepehi ba sebopeho le ho thibela ho lula le ho arohana.

Ka kakaretso, khetho ea sehlopha sa viscosity e lokela ho leka-lekanya phello e teteaneng, litšenyehelo, le ts'ebetso ea kopo; phahameng viscosity hase kamehla molemo.

2. Taolo e utloahalang ea Keketso ea HEC

2.1. 0.2%-0.6% (e ipapisitse le sehlahisoa se felileng)

Lipente tse tloaelehileng tsa ka hare tsa lebota hangata li sebelisa 0.25%-0.40%, ha liphahlo tse phahameng kapa litsamaiso tse phahameng tsa PVC li ka fihla ho pota 0.5%.

2.2. Chelete ea tlatsetso e tlameha ho fetoloa hanyane ho latela lintlha tse latelang:

Tekanyo ea pigment le filler le boleng ba PVC: Ha PVC e phahame, ho hlokahala HEC e eketsehileng.

Mofuta oa Emulsion: Li-emulsion tse nang le karolo e phahameng ea lintho tse etsang filimi le momahano e matla li hloka ho teteana hanyenyane hanyenyane.

Sepheo sa viscosity: Mekhoa e fapaneng ea kopo e fella ka phapang e kholo ea viscosity e hlokahalang.

Ho lumellana le li-thickeners tse ling: Haeba li kopantsoe le HEUR, ASE, joalo-joalo, tekanyo ea HEC e ka fokotsoa ka nepo.

RTekanyetso e loketseng ea HEC e lokela ho finyelloa: viscosity e itekanetseng e tsitsitseng, botsitso ba tsamaiso, ha ho na ho fafatsa nakong ea kopo, le boikutlo bo boreleli ba brushing.

3. Mekhoa e Nepahetseng ea Keketso le ea ho Fella

3.1. Mokhoa o lokiselitsoeng esale pele oa Stock Solution (E khothalelitsoe)

Lokisetsa tharollo e hlakileng, e hlakileng ea HEC ka karolelano ea 1:20-1:40 pele u e eketsa tsamaisong ea pente ea latex. Melemo:

Ho qhibiliha ka ho feletseng, ha ho na likaroloana tsa mahlo a litlhapi

E thusa ho hlophisa hantle viscosity

E qoba ho ba le tšusumetso e matla ea sebakeng sa emulsion

Tharollo ea stock e lokela ho qhibiliha 1-Lihora tse 2 esale pele.

3.2. Mokhoa o otlolohileng oa Keketso ea Phofo e Omileng (E Hloka Taolo e Matla)

Haeba ho hlokahala ho eketsa phofo e omileng, latela litataiso tsena:

Sefa butle ha o ntse o qhalakana ka lebelo le leholo ho thibela ho kokoana

Eketsa nakong ea mokhahlelo oa metsi, o qhibiliha ka ho feletseng pele o eketsa emulsion

Nako ea ho tsamaea ha ea lokela ho ba ka tlase ho metsotso e 20-Metsotso e 30

Eketsa sesebelisoa sa ho kolobisa pele kapa sebelisa HEC e qhibilihang ka potlako ha ho hlokahala ho fokotsa ho bokellana.

4. Mekhoa ea ho Ntlafatsa Liphello tsa Rheological System

4.1. Sebelisa le HOUR/ASE

Sistimi e kopantsoeng e ntlafatsa haholo thixotropy, e ntlafatsa li-anti-splatter le thepa ea boemo bo holimo, 'me e etsa hore kopo e be bonolo.

4.2. Taolo ea pH le Sistimi ea ho Sireletsa

HEC e sebetsa hantle ka ho fetesisa maemong a pH a 7-11; acidity e feteletseng e ka fokotsa viscosity habonolo. Li-preservative tse ling li ka ama sekhahla sa ho felisoa ha HEC.

4.3. Storage Stability Control

Nakong ea polokelo ea nako e telele mochesong o phahameng, li-viscosity tse phahameng HEC e ka 'na ea e-ba le ho fokotseha ha viscosity. Ka hona, lihlahisoa tse fetotsoeng holim'a metsi li ka khethoa.

4.4. Ho Thibela Botenya bo Fosahetseng le ho Sagging

Ka mor'a ho finyella sepheo sa viscosity ha ho etsoa, ​​​​borashe, rolling le liteko tsa sagging li lokela ho etsoa. Karo-karolelano ea HEC e lokela ho hlophisoa hantle ho etsa bonnete ba hore ts'ebeliso e ts'oanang e ikutloa.

Keketso e loketseng eaHEC ho penta ea latex ho hloka ho nahanoa ka botlalo ka khetho ea sehlopha sa viscosity, taolo ea litekanyetso, mokhoa oa ho qhala, le ntlafatso ea sebopeho sa rheological. Ho khetha HEC e nepahetseng le ho e sebelisa ka nepo ha e ntlafatse feela ts'ebetso le boleng ba ponahalo ea pente empa hape e matlafatsa botsitso ba polokelo le boemo ba sehlahisoa, e leng se etsang hore e be karolo ea bohlokoa ea ho ntlafatsa boleng ba pente ea latex.