PIB Bis-Succinimide ntawm 5–10 wt% yog thawj qhov sib txawv ntawm API CK-4/ACEA E9 HDEO tej pob khoom - nws superior shear stability thiab siab -soot viscosity tswj ua rau nws tus qauv xaiv rau ntev -drain applications qhov twg monoufSI ntawm kev ua tau zoo{9} kawg-ntawm-drain. At 7 wt% treat of a PIB MW 1100 grade (N% 2.0%): total N contribution to finish oil ≈ 0.14 wt%; viscosity contribution ≈ +20 cSt @100℃yuav tsum suav rau hauv cov roj tiav SAE qib suav; S/A, S, P contribution=0. Hauv EGR- hnyav 15W-40 HDEO (cov tsheb thauj khoom ib txwm muaj roj nplua nyeem), bis-succinimide muab cov pob txha tawg uas ua rau ua raws li API CK-4 Mack T-13 viscosity nce tsawg dua lossis sib npaug rau 12% cSt @ 10℃loading.

Premium European ntev -drain PCMO specifications (VW 504.00/507.00 mus txog 30,000 km; BMW LL-04 mus txog 25,000 km) yuav tsum muaj peev xwm dispersancy uas yog sustained los ntawm tag nrho cov txuas txuas ntxiv - ib qho kev sib tw uas nthuav tawm lub shear degradation ntawm mononide1{1} Bis-succinimide ntawm 4–8 wt% muab cov shear- khov kho cov txha nraub qaum rau cov txheej txheem ntev no -drain formulations, feem ntau yog siv nrog rau kev kho me me ntawm mono-PIBSI kom ua tiav qhov zoo tshaj qhov sib npaug ntawm Sequence VH sludge rating 18}mono{{10} thiab qis dua ntev-drain soot viscosity control (bis-favoured at high soot and end-of-drain). Hauv ACEA C3 formulations (S / A Tsawg dua lossis sib npaug rau 0.8%, S Tsawg dua lossis sib npaug rau 0.3%), bis-succinimide kho tus nqi tuaj yeem ua kom zoo dua yam tsis muaj kev cuam tshuam SAPS.

Bis-succinimide yog cov nyiam dispersant nyob rau hauv tsis siv neeg kis tau tus mob kua (ATF), CVT kua, thiab siab -kev ua tau zoo phau ntawv iav roj qhov twg lub heev shear ib puag ncig ntawm lub kis tau tus mob yuav tsum tau ib tug dispersant uas tswj molecular kev ncaj ncees nyob rau hauv lub kis tau tus mob kua lub neej kev pab cuam. Hauv ATF, bis-succinimide ntawm 3–6 wt% muab qhov sib txawv uas xav tau los tiv thaiv cov kua roj vanish fouling ntawm lub cev lub cev thiab cov phaj clutch - tej yam kev mob uas mono-succinimide qhov qis shear stability ua rau muaj kev cuam tshuam loj zuj zus ntawm thawj 30,000–50,00. Lub dual PIB thauj tog rau nkoj ntawm bis{13}}succinimide muaj sia nyob kis tau tus mob shear yam zoo dua, muab cov kua roj vanish zoo ib yam thiab sludge tswj thoob plaws hauv lub neej ntawm cov kua dej.

Nyob rau hauv marine TPEO thiab cov roj cav roj uas muaj kev pab cuam lub sijhawm ntawm 1,000–4,000 teev tsim cov thermal thiab mechanical kev nyuaj siab ntawm cov molecule dispersant, bis -succinimide's superior thermal stability (lub siab kaw ob qho tib si -kawg imide qauv muaj tsawg dua reactive sites rau thermal decomposition{7} vs. mono-succinimide) muab kev cuam tshuam zoo dua nyob rau lub sijhawm txuas ntxiv. Nyob rau hauv cov roj cav roj, bis{11}}succinimide zoo disperses nitrated polar los ntawm- khoom los ntawm NOₓ tshuab-los ntawm - sab hauv -NH pawg ntawm polyamine choj H- khi nrog nitro{16}} cov khoom sib txuas, tswj lawv cov kev tsim thiab kev tiv thaiv ntawm vsparn valve tsheb ciav hlau ntog tshaj li 2,000-teev cov dej ntws nruab nrab ntawm cov nqi roj cav roj.

Q: Vim li cas PIB Bis-Succinimide muaj N% siab dua (1.5–3.5%) dua li mono-PIBSI (0.8–2.5%) thaum cov qauv bis kaw ob lub davhlau ya nyob twg amine pawg rau hauv imide rings?

Qhov no yog ib qho kev tsis meej pem. Qhov siab dua N% hauv bis-succinimide tsis yog los ntawm kev muaj ntau lub davhlau ya nyob twg -NH₂ pawg (qhov tseeb, cov qauv bis muaj tsawg dua lub davhlau ya nyob twg amines dawb dua li mono - ob qhov kawg yog lub nplhaib- kaw). Qhov siab dua N% tshwm sim los ntawm ob qhov chaw: (1) cov saw hlau polyamine siv hauv bis -succinimide synthesis ntev dua (xws li TEPA=tetraethylenepentamine nrog 5 N atoms, los yog PEHA=pentaethylenehexamine nrog 6 N atoms) - cov saw ntev ntev yog qhov tsim nyog rau kev ua kom tiav PIBSA units, thiab cov saw ntev no coj ntau sab hauv -NH nitrogen atoms ib molecule; (2) bis-succinimide molecule muaj ob lub imide nplhaib nitrogen atoms vs ib qho hauv mono-succinimide. Cov txiaj ntsig zoo yog tias txawm tias feem pua ​​​​ntawm cov davhlau ya nyob twg dawb -NH₂ qis dua (cov no yog lub nplhaib- kaw), tag nrho N cov ntsiab lus ntawm ib chav tsev loj dua. Cov chaw ua haujlwm tawm mus yog cov pab pawg amine sab hauv (–NH–) raws tus choj polyamine, tsis yog cov haujlwm hauv davhlau ya nyob twg - cov no tseem muaj tshuaj lom neeg rau H- khi nrog cov xuab zeb hauv ob qho tib si mono- thiab bis-succinimide.

Q: Hauv kev tsim HDEO tshiab, kuv puas yuav tsum siv mono-succinimide, bis-succinimide, lossis kev sib xyaw?

Kev lag luam-cov lus teb rau niaj hnub API CK-4/ACEA E9 HDEO yog ib qhosib tov ntawm ob, nrog bis -succinimide ua feem ntau cov khoom. Cov lus qhia siv tau: yog tias koj lub formulation yuav tsum dhau ob qho tib si Mack T-13 (siab-soot viscosity - yuav tsum tau bis-succinimide's shear stability) thiab Sequence VH sib npaug (sludge ntawm qis soot -} mono-PIB marginally zoo dua), qhov sib piv ntawm cov dawb marginal yog zoo dua. 60-70% bis / 30-40% mono feem ntau ua tiav ob qho tib si ib txhij. Yog hais tias tus thawj tsav tsheb yog ntev -drain EGR-lub luag hauj lwm hnyav (xws li Volvo T-13, Plhaub Rotella ntev-drain spec), nce bis -succinimide piv rau 70–80%. Yog hais tias tus thawj tsav tsheb yog PCMO sludge / kua roj vanish (Sequence VH dominant), nce mono-PIBSI piv rau 50-60%. Rau ATF lossis CVT kua, siv 80-100% bis-succinimide vim qhov yuav tsum tau muaj kev ruaj ntseg shear. Sinolook tuaj yeem muab ob qib thiab muab kev tsim qauv kev txhawb nqa rau kev ua kom zoo dua ntawm mono: bis piv rau koj daim ntawv thov tshwj xeeb.

Q: Puas yog PIB Bis-Succinimide muaj txiaj ntsig rau qib roj viscosity tiav, thiab nws yuav tsum suav nrog hauv qib SAE li cas?

Yes - PIB Bis-Succinimide at 100–600 cSt @100°C contributes meaningfully to finished oil kinematic viscosity, especially at the 5–10 wt% treat rates typical in HDEO. At 7 wt% treat of a grade with viscosity 350 cSt @100°C, the dispersant's contribution to finished oil viscosity at 100°C is approximately 7% × (350 − 4) cSt ≈ +24 cSt above the base oil contribution - significant relative to the SAE 40 target of 12.5–16.3 cSt. This contribution must be included in the blending calculation: use the blending viscosity formula (Refutas index or ASTM D341 blending) with each component's viscosity at the blend temperature. Higher MW bis-succinimide grades (PIB >1500) muaj feem ntau dua viscosity contributions - ntawm 10 wt% kho ntawm qib 500 cSt, qhov kev koom tes mus txog +49 cSt, uas yuav ua rau nws tsis tuaj yeem tsim SAE 30 lossis 40 qib yam tsis tau them nrog qis dua - viscosity puag roj. Rau SAE 30/40 HDEO, siv PIB MW 900–1100 bis-succinimide (viscosity 150–300 cSt) ntawm 5–8 wt% kom viscosity contribution manageable.

Ashless Dispersants:PIB ✅ · PIB Bis -Succinimide ✅ · PIB Poly-Succinimide (tom ntej)· Borated PIBSI · Borated Bis-Succinimide · Boron-Phosphated Bis-Succinimide · Tsawg Viscosity Dispersant