Akụkọ

Usoro mgbasa na mgbasasị nke ọkụ ọkụ siri ike na Polyurethane AB Adhesive System

N'ihi na mgbasa / mgbasa nke siri ike ire retardants dị ka aluminom hypophosphite (AHP), aluminum hydroxide (ATH), zinc borate, na melamine cyanurate (MCA) na a polyurethane AB nrapado usoro, isi nzọụkwụ na-agụnye pretreatment, stepwise mgbasa, na nlezianya mmiri akara. N'okpuru ebe a bụ usoro zuru ezu (maka nnukwu ọkụ-retardant formulations, ndị ọzọ formulations nwere ike gbanwee ya).

I. Isi ụkpụrụ

"Mgbasa" bụ n'ezie mgbasa: Ndị na-ere ọkụ siri ike ga-agbasasị n'otu n'otu na polyol (A-component) iji mepụta nkwusioru kwụsiri ike.
Ngwọta nke ire ere: dozie okwu gbasara mmịpụta mmiri, agglomeration na reactivity na isocyanates.
Mgbakwunye Stepwise: Tinye ihe n'usoro nke njupụta na urughuru nha iji zere nnukwu mkpokọta mpaghara.
Njikwa mmiri siri ike: Mmiri na-eri isocyanate (-NCO) na akụkụ B, na-eduga na ọgwụgwọ adịghị mma.

II. Usoro eji arụ ọrụ zuru oke (dabere na akụkụ 100 polyol na mpaghara A)

Kwụpụ 1: Ngwọta Ọkụ Ọkụ (awa 24 tupu oge eruo)

Aluminom Hypophosphite (AHP, akụkụ 10):
- Mkpuchi elu ya na onye na-ahụ maka njikọ njikọ silane (KH-550) ma ọ bụ onye na-ejikọta titanate (NDZ-201):
  - Mix 0,5 akụkụ njikọ njikọ + 2 akụkụ anhydrous ethanol, kpalie 10 min maka hydrolysis.
  - Tinye AHP ntụ ntụ ma kpalie na oke ọsọ (1000 rpm) maka 20 min.
  - Ghichaa na oven na 80 Celsius C maka awa 2, wee chekwaa ya.
Aluminom Hydroxide (ATH, akụkụ 25):
- Jiri nha submicron, silane emezigharịrị ATH (dịka, Wandu WD-WF-20). Ọ bụrụ na agbanwebeghị, mesoo otu ahụ na AHP.
MCA (akụkụ 6) & Zinc Borate (akụkụ anọ):
- Kpọọ na 60 Celsius C maka awa 4 iji wepụ mmiri mmiri, wee sie ya na ihuenyo 300-mesh.

Kwụpụ 2: Usoro mgbasa A-Component (Polyol Side).

Ngwakọta ntọala:
- Tinye akụkụ 100 polyol (dịka ọmụmaatụ, polyether polyol PPG) na akpa nkụ.
- Tinye akụkụ 0.3 polyether emezigharịrị polysiloxane ọkwa ọkwa (dịka ọmụmaatụ, BYK-333).
Mgbasa Ọsọ dị obere:
- Tinye ọkụ ọkụ n'usoro: ATH (akụkụ 25) → AHP (akụkụ 10) → zinc borate (akụkụ 4) → MCA (akụkụ 6).
- Kwuo na 300-500 rpm maka 10 min ruo mgbe ọ nweghị ntụ ntụ fọdụrụ.
Mgbasa nke Shear dị elu:
- Gbanwee na onye na-ekesa ọsọ dị elu (≥1500 rpm) maka 30 min.
- Control okpomọkụ ≤50°C (iji gbochie polyol oxidation).
Egweri & Nnụcha (dị oke mkpa!):
- Gafee site na igwe igwe mpịakọta atọ ma ọ bụ igwe ihe igwe nkata 2-3 ruo mgbe ịdị mma ≤30μm (nwalere site na nlele Hegman).
Ndozi viscosity & Mwepụ ụfụfụ:
- Tinye akụkụ 0.5 hydrophobic fumed silica (Aerosil R202) iji gbochie idozi.
- Tinye akụkụ 0.2 silicone defoamer (dịka, Tego Airex 900).
- Nwuo na 200 rpm maka 15 min maka degassing.

Kwụpụ 3: Ọgwụgwọ akụkụ B-Component (Isocyanate Side).

Tinye akụkụ 4-6 molecular sieve (dịka, Zeochem 3A) na akụkụ B (dịka ọmụmaatụ, MDI prepolymer) maka mmịnye mmiri.
Ọ bụrụ na ị na-eji mmiri retardants phosphorous (nhọrọ viscosity dị ala), gwakọta ozugbo n'ime akụkụ B wee kpalie maka 10 min.

Kwụpụ 4: Ngwakọta & Ngwọta Akụkụ AB

Ngwakọta ngwakọta: Soro ụdị nrapado AB mbụ (dịka, A:B = 100:50).
Usoro ngwakọta:
- Jiri igwekota mbara ala nwere akụkụ abụọ ma ọ bụ tube agwakọta static.
- Mix maka 2-3 min ruo mgbe edo (enweghị eriri).
Ọnọdụ ọgwụgwọ:
- Ngwọta okpomọkụ nke ime ụlọ: awa 24 (gbatịpụrụ site na 30% n'ihi nnabata ọkụ na-egbochi ọkụ).
- Ngwọta ngwa ngwa: 60°C/2 awa ( kwadoro nsonaazụ na-enweghị afụ).

III. Isi ihe njikwa usoro

Ihe kpatara ihe egwu	Ngwọta	Usoro ule
AHP iru mmiri absorption / clumping	Mkpuchi Silane + molekụla sieve	Karl Fischer onye nyocha mmiri (≤0.1%)
ATH na-edozi	Hydrophobic silica + igwe igwe mpịakọta atọ	Nnwale guzoro awa 24 (enweghị stratification)
MCA na-ebelata ọgwụgwọ	Machie MCA ka ọ bụrụ akụkụ ≤8 + welie ọgwụgwọ ọgwụgwọ ruo 60ºC	Nnwale ihicha elu (≤40 min)
Zinc borate ndim	Jiri borate zinc dị ala (dịka ọmụmaatụ, breeki ọkụ ZB)	Viscometer (25ºC)

IV. Ụzọ mgbasa ọzọ (na-enweghị ngwa egweri)

Ọganihu igwe igwe bọọlụ:
- Gwakọta ndị na-ere ọkụ na polyol na nha 1: 1, igwe ihe igwe maka awa 4 (bọọlụ zirconia, nha 2mm).
Usoro Masterbatch:
- Kwadebe 50% ọkụ retardant masterbatch (polyol dị ka onye na-ebu), wee gbanye tupu ojiji.
Mgbasa nke Ultrasonic:
- Tinye ultrasonication (20kHz, 500W, 10 min) na slurry premixed (dabara obere batches).

V. Ndụmọdụ mmejuputa

Nnwale obere obere mbụ: Nwalee na 100g nke akụkụ A, na-elekwasị anya na nkwụsi ike viscosity (mgbanwe 24h <10%) na ọgwụgwọ ọsọ.
Iwu usoro mgbakwunye ọkụ retardant:
- "Nke mbụ dị arọ, ìhè mgbe e mesịrị; dị mma nke mbụ, nke na-adịghị mma" → ATH (dị arọ) → AHP (mma) → zinc borate (ọkara) → MCA (ìhè / enweghị isi).
Nchọpụta nsogbu mberede:
- Mmụba viscosity na mberede: Tinye 0.5% propylene glycol methyl ether acetate (PMA) ka ọ na-atụgharị.
- Ngwọta na-adịghị mma: Tinye 5% gbanwetụrụ MDI (dịka, Wanhua PM-200) na mpaghara B.