Sebopeho sa Reference-Retardant Formation bakeng sa Thermosetting Acrylic Adhesive
Ho fihlela litlhoko tsa UL94 V0 tse thibelang malakabe bakeng sa likhomaretsi tsa acrylic tse sebelisang thermosetting, ho nahanoa ka litšobotsi tsa li-retant tse seng li ntse li le teng tsa malakabe le lintlha tse ikhethang tsa litsamaiso tsa thermosetting, ho hlahisoa mokhoa o latelang o ntlafalitsoeng le tlhahlobo ea bohlokoa:
I. Melao-motheo ea Moralo oa Tlhahiso le Litlhoko tsa Sistimi ea Thermosetting
- E tlameha ho lekana le mocheso oa ho fola (hangata 120–180°C)
- Lintho tse thibelang malakabe li tlameha ho mamella ts'ebetso ea mocheso o phahameng (qoba ho hloleha ho bola)
- Netefatsa botsitso ba ho hasana lits'ebetsong tse nang le bongata bo boholo ba li-crosslink
- Ho leka-lekanya matla a mechini kamora ho fola le bokgoni ba ho thibela malakabe
II. Moralo oa Sistimi e Sireletsang Mollo ka Tšusumetso e Kopanetsoeng
Mesebetsi e Sireletsang Mollo le ho Tsamaellana ha Thermoset
| Se thibelang malakabe | Karolo ea Bohlokoa | Ho lumellana ha Thermoset | Ho Khothalletsoa ho Kenya |
|---|---|---|---|
| ATH e ntle haholo | FR e ka Sehloohong: Ho felloa ke metsi 'meleng, ho hlapolloa ha khase ka mohato | E hloka phetoho ea bokaholimo (khahlanong le ho kopana ha lintho) | ≤35% (ho jarisa ho feteletseng ho fokotsa ho hokahanya) |
| Hypophosphate ea aluminium | Synergist: Char catalyst, radical scavenger (PO·) | Fokotsa mocheso >300°C, e loketse ho phekolwa | 8–12% |
| Borate ea zinki | Mohlohlelletsi oa Char: E etsa mokoallo o kang khalase, e fokotsa mosi | E sebelisana le ATH (Al-BO char) | 5–8% |
| MCA (Melamine cyanurate) | FR ea karolo ea khase: E lokolla NH₃, e thibela ho cha | Fokotsa mocheso 250–300°C (mocheso o matlafatsang <250°C) | 3–5% |
III. Tlhahiso e Khothaletsoang (Boima %)
Tataiso ea Ts'ebetso ea Likarolo
| Karolo | Karolelano | Lintlha tsa Bohlokoa tsa Ts'ebetso |
|---|---|---|
| Resin ea acrylic ea thermoset | 45–50% | Mofuta oa viscosity e tlase (mohlala, epoxy acrylate) bakeng sa ho tlatsa ka bongata |
| ATH e fetotsoeng holim'a metsi (D50 <5µm) | 25–30% | E phekotsoe esale pele ka silane ea KH-550 |
| Hypophosphate ea aluminium | 10–12% | E kopantsoe le ATH esale pele, e ekelitsoe ka lihlopha |
| Borate ea zinki | 6–8% | E ekelitsoe ka MCA; qoba ho senyeha ha moriri o molelele |
| MCA | 4–5% | Ho kopanya ka lebelo le tlase mohatong wa morao (<250°C) |
| Dispersant (BYK-2152 + PE wax) | 1.5–2% | E netefatsa ho hasana ha li-filler ka mokhoa o ts'oanang |
| Moemeli oa ho kopanya (KH-550) | 1% | E phekotsoe esale pele ho ATH/hypophosphite |
| Moemeli oa ho folisa (BPO) | 1–2% | Sesebelisoa sa ho lokisa mocheso o tlase bakeng sa ho phekola ka potlako |
| Moemeli oa ho thibela ho hloleha ha mesifa (Aerosil R202) | 0.5% | Thibelo ea ho senngoa ha thixotropic |
IV. Taolo ea Ts'ebetso ea Bohlokoa
1. Ts'ebetso ea ho Hasana
- Pele ho kalafo: ATH le hypophosphite tse kolobisitsoeng ka har'a tharollo ea 5% KH-550/ethanol (lihora tse 2, ho omisa ka 80°C)
- Tatellano ea ho kopanya:
- Resin + disaspersant → Ho kopanya ka lebelo le tlase → Eketsa ATH/hypophosphite e fetotsoeng → Ho hasanya ka lebelo le phahameng (2500 rpm, metsotso e 20) → Eketsa zinc borate/MCA → Ho kopanya ka lebelo le tlase (qoba ho senyeha ha MCA)
- Lisebelisoa: Motsoako oa lipolanete (ho tlosa khase ka vacuum) kapa mochini oa ho phunya lirolo tse tharo (bakeng sa phofo e ntle haholo)
2. Ntlafatso ea ho Folisa
- Ho phekola ka mohato: 80°C/1h (pele ho gel) → 140°C/2h (kamora ho fola, qoba ho bola ha MCA)
- Taolo ea khatello: 0.5–1 MPa ho thibela ho tiea ha setlolo
3. Mekhoa ea ho Kopanya
- ATH + Hypophosphite: E theha char e matlafalitsoeng ke AlPO₄ ha e ntse e tlosa li-radical (PO·)
- Borate ea Zinki + MCA: Thibelo e habeli e tiileng joaloka khase (tlhapollo ea NH₃ + lera le qhibilihisitsoeng joaloka khalase)
V. Maano a ho Lokisa Tshebetso
Mathata a Tloaelehileng le Litharollo
| Hlahisa | Sesosa sa ho qala | Tharollo |
|---|---|---|
| Ho tjhesa ha metsi | Vithesis e tlase ea ho qhibiliha | Eketsa MCA ho 5% + hypophosphite ho 12%, kapa eketsa 0.5% PTFE micropowder |
| Ho robeha ha bonolo ka mor'a ho fola | Ho jarisoa ho feteletseng ha ATH | Fokotsa ATH ho 25% + 5% nano-CaCO₃ (ho tiisa) |
| Ho boloka seretse | thixotropy e mpe | Eketsa silika ho 0.8% kapa fetohela ho BYK-410 |
| LOI <28% | FR e sa lekaneng ea karolo ea khase | Kenya phosphorus e khubelu e koahetsoeng ka 2% kapa 1% nano-BN |
VI. Litekanyo tsa Netefatso
- UL94 V0: Disampole tsa 3.2 mm, nako yohle ya malakabe <50 s (ha ho na ho hotetsa ha k'hothone)
- LOI ≥30% (tekanyo ea polokeho)
- Masala a TGA >25% (800°C, N₂)
- Tekanyo ea mechini: Matla a ho tsikinyeha >8 MPa, matla a ho beola >6 MPa
Lintlha tsa Bohlokoa
- E fihlella tekanyo ea V0 ha e ntse e boloka botšepehi ba mechini.
- Liteko tse nyane (50g) li khothaletsoa pele ho hola.
- Bakeng sa ts'ebetso e phahameng: 2–3% ea li-derivatives tsa DOPO (mohlala, phosphaphenanthrene) li ka eketsoa.
Sebopeho sena se netefatsa ho latela maemo a thata a thibelang malakabe ha ka nako e ts'oanang se ntlafatsa bokgoni ba ho sebetsa le tshebetso ya ho qetela ya tshebediso.
Nako ea poso: Phupu-01-2025
