Epoxy Resin

1,Selelekela

Epoxy resin hangata e sebelisoa hammoho le li-additives. Li-additives li ka khethoa ho latela lisebelisoa tse fapaneng. Li-additives tse tloaelehileng li kenyelletsa Moemeli oa Pheko, Modifier, Filler, Diluent, joalo-joalo.

Moemeli oa pheko ke sehlomathiso se hlokahalang. Hore na resin ea epoxy e sebelisoa e le sekhomaretsi, ho roala, ho lahloa, ho alafa ho lokela ho eketsoa, ​​​​ho seng joalo e ke ke ea phekoleha. Ka lebaka la litlhoko tse fapaneng tsa ts'ebeliso le ts'ebetso, ho na le litlhoko tse fapaneng tsa epoxy resin, pheko ea pheko, modifier, filler, diluent le li-additives tse ling.

2,Khetho ea Epoxy Resin

(1) Khetha ho latela Aplication

① Ha e sebelisoa e le sekhomaretsi, ho molemo ho khetha resin e nang le boleng bo bohareng ba epoxy (0.25-0.45);

② Ha e sebelisoa e le castable, ho molemo ho khetha resin e nang le boleng bo phahameng ba epoxy (0.40);

③ Ha e sebelisoa e le ho roala, resin e nang le boleng bo tlaase ba epoxy (<0.25) e khethoa ka kakaretso.

(2) Khetha ho ea ka Matla a Mechini

Matla a amana le tekanyo ea crosslinking. Boleng ba epoxy bo phahame, 'me tekanyo ea crosslinking e boetse e phahame ka mor'a ho phekola. Boleng ba epoxy bo tlase mme degree ea crosslinking e tlase kamora ho folisoa. Boleng bo fapaneng ba epoxy le bona bo tla baka matla a fapaneng.

① Resin e nang le boleng bo phahameng ba epoxy e na le matla a holimo empa e brittle;

② Resin e nang le boleng bo bohareng ba epoxy e na le matla a matle mocheso o phahameng le o tlase;

③ Resin e nang le boleng bo tlase ba epoxy e na le matla a fokolang mochesong o phahameng.

(3) Khetha ho ea ka Litlhoko tsa Ts'ebetso

① Bakeng sa ba sa hlokeng ho hanyetsa mocheso o phahameng le matla, ba ka khetha resin e nang le boleng bo tlase ba epoxy bo ka omellang kapele mme ho seng bonolo ho lahleha.

② Bakeng sa ba hlokang ho kenella hantle le matla, ba ka khetha resin e nang le boleng bo phahameng ba epoxy.

3,Khetho ea Moemeli oa Phekolo

(1) Mofuta oa Setsi sa Pheko:

Lisebelisoa tse tloaelehileng tsa ho phekola epoxy resin li kenyelletsa aliphatic amine, alicyclic amine, amine e nkhang hamonate, polyamide, anhydride, resin le tertiary amine. Ntle le moo, tlas'a tšusumetso ea photoinitiator, UV kapa leseli le tsona li ka etsa hore epoxy resin e folise. Amine e phekolang hangata e sebelisoa bakeng sa mocheso oa kamore kapa ho folisa mocheso o tlase, athe anhydride le ntho e folisang e nkhang hamonate hangata e sebelisoa bakeng sa ho futhumatsa.

(2) Tekanyo ea Moemeli oa Pheko

① Ha amine e sebelisoa e le ntho e kopanyang, e baloa ka tsela e latelang:

Tekanyo ea amine = MG / HN

M = boima ba molek'hule ea amine;

HN = palo ea hydrogen e sebetsang;

G = boleng ba epoxy (epoxy e lekana le 100 g ea epoxy resin)

Lebelo la phetoho ha le fete 10-20%. Haeba e phekoloa ka amine e feteletseng, resin e tla fetoha brittle. Haeba tekanyo e le nyane haholo, pheko ha e ea nepahala.

② Ha anhydride e sebelisoa e le crosslinking agent, e baloa ka tsela e latelang:

Tekanyetso ea anhydride = MG (0.6 ~ 1) / 100

M = boima ba molek'hule ea anhydride;

G = boleng ba epoxy (0.6 ~ 1) ke coefficient ea liteko.

(3) Molao-motheo oa ho Khetha Moemeli oa Pheko

① Litlhoko tsa Ts'ebetso.

Tse ling li hloka ho hanyetsa mocheso o phahameng, tse ling li hloka ho tenyetseha, 'me tse ling li hloka khanyetso e ntle ea kutu. Moemeli ea nepahetseng oa phekolo o khethoa ho latela litlhoko tse fapaneng.

② Mokhoa oa ho phekola.

Lihlahisoa tse ling ha li khone ho futhumala, joale ho ke ke ha khethoa moemeli oa phekolo ea mocheso oa mocheso.

③ Nako ea Kopo.

Nako e bitsoang nako ea kopo e bua ka nako ea ho tloha nakong eo epoxy resin e kenyelletsoang le moemeli oa phekolo ho fihlela nakong eo e ke keng ea sebelisoa. Bakeng sa ts'ebeliso e telele, li-anhydrides kapa li-latent curring agents hangata li sebelisoa.

④ Tšireletseho.

Ka kakaretso, pheko e nang le chefo e fokolang e betere ebile e bolokehile bakeng sa tlhahiso.

⑤ Litšenyehelo.

4,Khetho ea ho fetola

Phello ea mofetoleli ke ho ntlafatsa ho fifala ha letlalo, ho kuta, ho hanyetsa ho kobeha, ho hanyetsa tšusumetso le ts'ebetso ea ho kenya letsoho ea epoxy resin.

(1) Liphetoho tse Tloaelehileng le Libopeho

① Polysulfide rabara: ntlafatsa matla a tšusumetso le ho hanyetsa ha peeling;

② Polyamide resin: ntlafatsa brittleness le ho khomarela;

③ Polyvinyl joala TERT butyraldehyde: ntlafatsa ts'ebetso ea ts'ebetso ea tanning;

④ NBR: ntlafatsa ts'ebetso ea ts'oaetso ea letlalo;

⑤ Phenolic resin: ntlafatsa ho hanyetsa mocheso le ho hanyetsa kutu;

⑥ resin ea polyester: ntlafatsa ts'ebetso ea ts'ebetso ea letlalo;

⑦ Urea formaldehyde melamine resin: eketsa khanyetso ea lik'hemik'hale le matla;

⑧ Resin ea Furfural: ntlafatsa ts'ebetso e tsitsitseng ea ho khumama, ntlafatsa ho hanyetsa acid;

⑨ Vinyl resin: ntlafatsa ho hanyetsa ha peeling le matla a tšusumetso;

⑩ Isocyanate: fokotsa ho kenella ha mongobo le ho eketsa ho hanyetsa metsi;

11 Silicone: ntlafatsa ho hanyetsa mocheso.

(2) Tekanyetso

① Polysulfide rabara: 50-300% (e nang le moemeli oa phekolo);

② Polyamide resin le phenolic resin: 50-100%;

③ Polyester resin: 20-30% (ntle le moemeli ea folisang, kapa karolo e nyane ea ho phekola ho potlakisa karabelo.

Ka kakaretso, ha ho sebelisoa modifier, ho na le maemo a mangata, empa mocheso oa mocheso oa lihlahisoa tsa resin o fokotseha ka tsela e nepahetseng. E le ho ntlafatsa ho feto-fetoha ha resin, lisebelisoa tse thata tse kang dibutyl phthalate kapa dioctyl phthalate hangata li sebelisoa.

5,Khetho ea Li-Fillers

Mosebetsi oa li-fillers ke ho ntlafatsa thepa e itseng ea lihlahisoa le maemo a ho felisa mocheso oa ho phekola resin. E ka boela ea fokotsa palo ea epoxy resin le ho fokotsa litšenyehelo. Li-fillers tse fapaneng li ka sebelisoa bakeng sa merero e fapaneng. E lokela ho ba ka tlase ho 100 mesh, mme litekanyetso li ipapisitse le ts'ebeliso ea eona. Li-fillers tse tloaelehileng ke tse latelang:

(1) Fiber ea asbestos le fiber ea khalase: eketsa ho tiea le ho hanyetsa tšusumetso;

(2) phofo ea quartz, phofo ea porcelain, phofo ea tšepe, samente, emery: eketsa ho thatafala;

(3) Alumina le phofo ea porcelain: eketsa matla a sekhomaretsi le matla a mochine;

(4) phofo ea asbestos, phofo ea gel ea silika le samente e phahameng ea mocheso: ntlafatsa ho hanyetsa mocheso;

(5) Asbestos phofo, phofo ea quartz le phofo ea majoe: fokotsa sekhahla sa ho fokotseha;

(6) Aluminium phofo, phofo ea koporo, phofo ea tšepe le lisebelisoa tse ling tsa tšepe: eketsa conductivity ea mocheso le conductivity;

(7) Phofo ea graphite, phofo ea talc le phofo ea quartz: ntlafatsa ts'ebetso e khahlanong le ho apara le ts'ebetso ea lubrication;

(8) Emery le li-abrasives tse ling: ntlafatsa ts'ebetso ea anti-wear;

(9) Mica phofo, phofo ea porcelain le phofo ea quartz: eketsa ts'ebetso ea ho kenya letsoho;

(10) Mefuta eohle ea li-pigments le graphite: ka 'mala;

Ho phaella moo, ho ea ka lintlha, chelete e loketseng (27-35%) ea P, As, Sb, Bi, Ge, Sn le Pb oxides e kenyelitsoeng ka resin e ka boloka ho khomarela tlas'a mocheso o phahameng le khatello.

6,Khetho ea Diluent

Mosebetsi oa diluent ke ho fokotsa viscosity le ho ntlafatsa ho phunyeletsa ha resin. E ka aroloa ka mekhahlelo e 'meli ea inert le e sebetsang,' me chelete ka kakaretso ha e fete 30%. Li-diluent tse tloaelehileng li kenyelletsa diglycidyl ether, polyglycidyl ether, propylene oxide butyl ether, propylene oxide phenyl ether, dicyclopropane ethyl ether, triethoxypropane propyl ether, inert diluent, xylene, toluene, acetone, joalo-joalo.

7,Litlhoko tsa Lintho

Pele o kenyelletsa moemeli oa pheko, lisebelisoa tsohle tse sebelisitsoeng, joalo ka resin, pheko ea pheko, filler, modifier, diluent, joalo-joalo, li tlameha ho hlahlojoa, tse tla fihlela litlhoko tse latelang:

(1) Ha ho na metsi: thepa e nang le metsi e lokela ho omisoa pele, ’me metsoako e nang le metsi a manyenyane e lokela ho sebelisoa hanyenyane kamoo ho ka khonehang.

(2) Bohloeki: likahare tsa litšila ntle le metsi li lokela ho ba ka tlase ho 1%. Leha e ka sebelisoa hape le litšila tse 5% -25%, liperesente tse ling tsa 'mele li lokela ho eketseha. Ho molemo ho sebelisa reagent grade ka chelete e nyane.

(3) Nako ea ho sebetsa: Hoa hlokahala ho tseba hore na lisebelisoa ha li sebetse.