Hona joale, ho na le mefuta e mengata e tloaelehileng ea li-sealant tse nang le karolo e le 'ngoe ea reactive elastic' marakeng, haholo-holo lihlahisoa tsa silicone le polyurethane sealant.Mefuta e fapaneng ea li-elastic sealants e na le phapang lihlopheng tsa bona tse sebetsang tse sebetsang le meaho e meholo ea ketane e folisitsoeng.Ka lebaka leo, ho na le mefokolo e mengata kapa e fokolang likarolong le masimo a sebetsang.Mona, re kenyelletsa mekhoa ea ho folisa ea li-sealant tse 'maloa tse tloaelehileng tsa karolo e le' ngoe ea reactive elastic sealants le ho bapisa melemo le melemo ea mefuta e fapaneng ea li-elastic sealants, e le ho tebisa kutloisiso ea rona le ho etsa khetho e nepahetseng lits'ebetsong tse sebetsang.
1. Mokhoa o tloaelehileng oa karolo e le 'ngoe ea reactive elastic sealant folisa
Li-reactive elastic sealants tse tloaelehileng tsa karolo e le 'ngoe li kenyelletsa: silicone (SR), polyurethane (PU), silyl-terinated modified polyurethane (SPU), silyl-terinated polyether (MS), prepolymer e na le lihlopha tse fapaneng tse sebetsang le mekhoa e fapaneng ea ho phekola.
1.1Mokhoa oa ho folisa oa silicone elastomer sealant
Setšoantšo sa 1. Mokhoa oa ho phekola oa silicone sealant
Ha li-silicone sealants li sebelisoa, prepolymer e arabela ka bongata ba mongobo moeeng ebe e tiisa kapa ea vulcanize tlas'a ketso ea catalyst.Lihlahisoa ke lintho tse nyenyane tsa molek'hule.Mochine o bontšoa ho Setšoantšo sa 1. Ho ea ka lintho tse fapaneng tse nyenyane tsa molek'hule tse lokolloa nakong ea ho phekola, silicone sealant e ka boela ea aroloa ka mofuta oa deacidification, mofuta oa deketoxime, le mofuta oa dealcoholization.Melemo le likotsi tsa mefuta ena ea sekhomaretsi sa silicone li akaretsoa ho Lethathamo la 1.
Letlapa la 1.Ho bapisa melemo le melemo ea mefuta e mengata ea li-adhesives tsa silicone.
1.2 Mokhoa oa ho phekola oa polyurethane elastic sealant
Karolo e le 'ngoe ea polyurethane sealant (PU) ke mofuta oa polymer e nang le likarolo tse pheta-phetoang tsa urethane (-NHCOO-) ka har'a ketane e kholo ea molek'hule.Mokhoa oa ho phekola ke hore isocyanate e itšoara ka metsi ho etsa carbamate e sa tsitsang ea bohareng, e ntan'o bola ka potlako ho hlahisa CO2 le amine, ebe amine e itšoara ka isocyanate e feteletseng tsamaisong, 'me qetellong e etsa elastomer e nang le mohaho oa marang-rang.Foromo ea eona ea pheko ke e latelang:
Setšoantšo sa 1.Ho phekola mokhoa oa ho itšoara ka polyurethane sealant
1.3 Mokhoa oa ho phekola oa silane-modified polyurethane sealant
Setšoantšo sa 3. Ho phekola mokhoa oa ho itšoara ka silane-modified polyurethane sealant
Ka lebaka la mefokolo e meng ea li-polyurethane sealants, polyurethane e sa tsoa fetoloa ke silane ho lokisa li-adhesives, ho etsa mofuta o mocha oa sekhomaretsi sa ho tiisa ka ketane e kholo ea sebopeho sa polyurethane le sehlopha sa ho qetela sa alkoxysilane, se bitsoang silane-modified polyurethane sealant (SPU).Karabelo ea ho phekola ea mofuta ona oa sealant e tšoana le ea silicone, ke hore, lihlopha tsa alkoxy li itšoara ka mongobo ho kena ka hydrolysis le polycondensation ho theha sebopeho sa marang-rang se tsitsitseng Si-O-Si tse tharo-dimensional (Setšoantšo sa 3).Lintlha tsa marang-rang tse hokahanyang marang-rang le lipakeng tsa libaka tsa marang-rang ke meaho ea likarolo tse feto-fetohang tsa polyurethane.
1.4 Mokhoa oa ho phekola oa li-silyl-terinated polyether sealants
silyl-terinated polyether sealant (MS) ke karolo e le 'ngoe ea sekhomaretsi se thehiloeng holim'a phetoho ea silane.E kopanya melemo ea bobeli ba polyurethane le silicone, ke moloko o mocha oa lihlahisoa tsa sealant, tse se nang PVC, oli ea silicone, isocyanate le solvent.Sekhomaretsi sa MS se sebetsana le mongobo moeeng mochesong oa mohatsela, hoo polymer e entsoeng ka silanized e nang le -Si(OR) OR -SIR (OR) - sebopeho sa hydrolyzed qetellong ea ketane ebe se hokelloa ho elastomer e nang le Si-O- Sebopeho sa marang-rang ho finyella ho tiisa le ho kopanya phello.Ts'ebetso ea kalafo ea kalafo ke e latelang:
Setšoantšo sa 4. Mokhoa oa ho phekola oa silyl-terinated polyether sealant
2. Papiso ea melemo le bofokoli ba li-elastic sealants tse tloaelehileng tsa karolo e le 'ngoe.
2.1 Melemo le bofokoli ba li-silicone sealants
⑴Melemo ea silicone sealant:
① Ho hanyetsa boemo ba leholimo bo botle, ho hanyetsa oksijene, ho hanyetsa ozone le ho hanyetsa mahlaseli a kotsi;② Ho fetoha habonolo ha mocheso o tlase.
⑵Mathata a silicone sealant:
①Ho khabisoa hampe hape ha ho khonehe ho penta;②Matla a tlase a ho lla;③Ho se lekane ha oli;④Ha e khone ho phunya;⑤Sekhomaretsi sa sekhomaretsi se hlahisa habonolo leachate e mafura e silafatsang konkreite, majoe le likarolo tse ling tse hlephileng.
2.2 Melemo le Mefokolo ea Polyurethane Sealants
⑴Melemo ea polyurethane sealant:
① Ho khomarela hantle ho mefuta e fapaneng ea li-substrates;② Ho fetoha habonolo ha mocheso o tlase;③ elasticity e ntle le thepa e ntle ea ho hlaphoheloa, e loketseng manonyeletso a matla;④ Matla a phahameng a mochini, khanyetso e ntle ea ho roala, ho hanyetsa oli le ho hanyetsa botsofali ba Biological;⑤ Boholo ba karolo e le 'ngoe e phekolang mongobo oa polyurethane sealants ha e na solvent ebile ha e na tšilafalo ho substrate le tikoloho;⑥ Bokaholimo ba sealant bo ka penta ebile ho bonolo ho se sebelisa.
⑵Mathata a polyurethane sealant:
① Ha o phekola sebakeng sa mocheso o phahameng le mongobo o phahameng ka lebelo le batlang le le lebelo, li-bubble li hlahisoa habonolo, tse amang ts'ebetso ea sealant;② Ha ho tlama le ho tiisa likaroloana tsa li-substrates tse se nang porous (tse kang khalase, tšepe, joalo-joalo), ka kakaretso ho hlokahala primer;③ E sa tebang Motsoako oa 'mala o ka hlaseloa ke botsofali ba UV, mme botsitso ba polokelo ea sekhomaretsi bo angoa haholo ke ho paka le maemo a kantle;④ Ho hanyetsa mocheso le ho hanyetsa botsofali ha hoa lekana.
2.3 Melemo le mathata a silane-modified polyurethane sealants
⑴Melemo ea silane e fetotsoeng polyurethane sealant:
① Ho phekola ha ho hlahise li-bubble;② E na le maemo a bonolo, ho hanyetsa hydrolysis le botsitso ba lik'hemik'hale;③ Ho hanyetsa boemo ba leholimo bo botle, ho hanyetsa mocheso, ho hanyetsa botsofali, botsitso ba polokelo ea lihlahisoa;④ Ho ikamahanya le maemo ho pharaletseng ho li-substrates, ha li tlamahanngoa Ka kakaretso, ha ho hlokahale primer;⑤Bokaholimo bo ka penta.
⑵Mathata a silane e fetotsoeng polyurethane sealant:
① Khanyetso ea UV ha e ntle joalo ka ea silicone sealant;② Ho hanyetsoa ha meokho ho mpe hanyenyane ho feta ea polyurethane sealant.
2.4 Melemo le melemo ea li-polyether sealants tse felisitsoeng ke silyl
⑴Melemo ea silyl-terinated polyether sealant:
① E na le meaho e metle ea tlamahano ho li-substrates tse ngata mme e ka fihlela tlamahano e sa lefelloeng ea primer;② E na le ho hanyetsa mocheso hamolemo le ho hanyetsa botsofali ba UV ho feta polyurethane e tloaelehileng;③ E ka penta holim'a eona.
⑵Mathata a silyl-terinated polyether sealant:
① Ho hanyetsa boemo ba leholimo ha ho tšoane le silicone ea silicone, 'me mapetsong a hlaha ka holim'a metsi ka mor'a ho tsofala;② Ho khomarela khalase ho fosahetse.
Ka kenyelletso e ka holimo, re na le kutloisiso ea pele ea mekhoa ea phekolo ea mefuta e mengata e sebelisoang ka tloaelo ea karolo e le 'ngoe ea li-elastic sealants,' me ka ho bapisa melemo le mathata a tsona, re ka finyella kutloisiso e akaretsang ea sehlahisoa ka seng.Lits'ebetsong tse sebetsang, sealant e ka khethoa ho ea ka maemo a sebele a kopo ea karolo ea tlamahano ho finyella ho tiisa hantle kapa ho kopanya karolo ea kopo.
Nako ea poso: Nov-15-2023