I-Halogen-Free Flame Retardant Formulation for TPU Coating System isebenzisa i-DMF Solvent

I-Halogen-Free Flame Retardant Formulation for TPU Coating System isebenzisa i-DMF Solvent

Kuzinhlelo zokuhlanganisa ze-TPU ezisebenzisa i-Dimethyl Formamide (DMF) njengesixazululi, ukusetshenziswa kwe-aluminium hypophosphite (AHP) ne-zinc borate (ZB) njengezinqamuli zomlilo kudinga ukuhlolwa okuhlelekile. Ngezansi ukuhlaziya okuningiliziwe nohlelo lokusebenza:

I. Ukuhlaziywa Kokwenzeka Kwe-Aluminium Hypophosphite (AHP)

1. Indlela Yokubuyiswa Kwelangabi Nezinzuzo

• Indlela:
• Ibola emazingeni okushisa aphezulu ukuze ikhiqize i-phosphoric kanye ne-metaphosphoric acid, ikhuthaze ukwakheka kwe-char ku-TPU (isigaba esifingqiwe sokubuyiswa komlilo).
• Ikhipha ama-PO· radicals ukuphazamisa ukusabela kweketango lokuvutha (isigaba segesi ukubambezeleka komlilo).
• Izinzuzo:
• Ayinayo i-halogen, intuthu ephansi, ubuthi obuphansi, ithobelana ne-RoHS/REACH.
• Ukuzinza okuhle kokushisa (izinga lokushisa lokubola ≈300 ° C), lilungele izinqubo zokumisa i-TPU (ngokuvamile <150 ° C).

2. Izinselele Zokusebenza Nezixazululo

3. Ukwakhiwa Nenqubo Enconyiwe

• Ukwakhiwa Kwesibonelo:
• Isisekelo se-TPU/DMF: 100 phr
• I-AHP eguquliwe ebusweni: 20 phr
• I-Zinc borate (ZB): 5 phr (i-synergy yokucindezela intuthu)
• I-Disperant (BYK-110): 1.5 phr
• Amaphuzu Abalulekile Okucubungula:
• Hlanganisa ngaphambili i-AHP ne-disperant nengxenye ye-DMF ngaphansi kwe-shear ephezulu (≥3000 rpm, 30 min), bese uhlanganisa ne-TPU slurry.
• Ukomiswa kwangemuva kokunameka: 120-150°C, kwandiswe isikhathi ngo-10% ukuze kuqinisekiswe ukuhwamuka okuphelele kwe-DMF.

II. Ukuhlaziywa Kokwenzeka Kwe-Zinc Borate (ZB)

1. Indlela Yokubuyiswa Kwelangabi Nezinzuzo

• Indlela:
• Yakha ungqimba lwengilazi ye-B₂O₃ emazingeni okushisa aphezulu, ivimbe umoya-mpilo nokushisa (isigaba esifingqiwe sokubuyiswa komlilo).
• Ikhipha amanzi abophekile (~13%), ihlanza amagesi avuthayo futhi ipholise isistimu.
• Izinzuzo:
• Umphumela onamandla we-synergistic nge-AHP noma i-aluminium trihydroxide (ATH).
• Ukucindezelwa kwentuthu okuhle kakhulu, kulungele ukusetshenziswa kwentuthu encane.

2. Izinselele Zokusebenza Nezixazululo

3. Ukwakhiwa Nenqubo Enconyiwe

• Ukwakhiwa Kwesibonelo:
• Isisekelo se-TPU/DMF: 100 phr
• I-Nano-size ZB: 8 phr
• I-AHP: 15 phr
• I-ejenti yokumanzisa (Tego 750W): 1 phr
• Amaphuzu Abalulekile Okucubungula:
• Sabalalisa ngaphambili i-ZB ku-DMF ngokusebenzisa ukugaya ubuhlalu (usayizi wezinhlayiyana ≤2μm) ngaphambi kokuxutshwa ne-TPU slurry.
• Nweba isikhathi sokumisa (isb., imizuzu engama-30) ukuze ugweme umswakama osalayo onomthelela ekubambezelekeni komlilo.

III. I-Synergistic Evaluation ye-AHP + ZB System

1. I-Synergistic Flame Retardant Effects

• I-Gas-Phase & Condensed-Phase Synergy:
• I-AHP ihlinzeka nge-phosphorus ukuze ishaje, kuyilapho i-ZB izinza ungqimba lwe-char futhi icindezela ukukhanya okungemuva.
• I-LOI ehlanganisiwe: 28-30%, UL94 V-0 (1.6mm) efinyelelekayo.
• Ukunciphisa Intuthu:
• I-ZB yehlisa ukukhishwa kwentuthu nge->50% (ukuhlolwa kwe-Cone Calorimeter).

2. Izincomo Zokulinganisa Ukusebenza

• Isinxephezelo Sendawo Yemishini:
• Engeza i-plasticizer ye-TPU engu-2-3% (isb, i-polycaprolactone polyol) ukuze ugcine ukuguquguquka (i-elongation >300%).
• Sebenzisa izimpushana ze-ultrafine (AHP/ZB <2μm) ukuze unciphise ukulahlekelwa amandla aqinile.
• Ukulawula Ukuzinza Kwenqubo:
• Gcina i-slurry viscosity ku-2000-4000 cP (Brookfield RV, spindle 4, 20 rpm) ukuze kuhlanganiswe umfaniswano.

IV. Ukuqhathanisa ne-Solvent-Based Liquid Flame Retardants

V. Izinyathelo Ezinconyiwe Zokusebenzisa

1. Ukuhlola Isikali Selebhu:

• Linganisa i-AHP/ZB ngayodwana nangenhlanganisela (ukulayishwa kwegradient: 10%, 15%, 20%).
• Hlola ukuzinza kokuhlakazeka (akukho ukudamba ngemva kwamahora angu-24), izinguquko ze-viscosity, nokufana kokumboza.

1. Ukuqinisekiswa Kwesikali Sokulinga:

• Lungiselela izimo zokomisa (isikhathi/izinga lokushisa) kanye nokuhlola ukubambezeleka komlilo (UL94, LOI) kanye nezakhiwo zemishini.
• Qhathanisa izindleko: Uma i-AHP+ZB yehlisa izindleko ngo->30% uma iqhathaniswa nama-liquid FRs, iyasebenza ngokomnotho.

1. Ukulungiselela Isikali:

• Hlanganyela nabahlinzeki ukuze uthuthukise ama-masterbatches e-AHP/ZB ahlakazeke ngaphambili (asekelwe ku-DMF) ukuze kwenziwe lula.

VI. Isiphetho

Ngezinqubo zokusabalalisa okulawulwayo, i-AHP ne-ZB zingasebenza njengezinqamuleli zomlilo ezisebenzayo zezingubo ze-TPU/DMF, uma nje:

1. Ukuguqulwa kobuso + ukuhlakazeka kwe-shear ephezuluisetshenziswa ukuvimbela izinhlayiyana agglomeration.
2. I-AHP (eyinhloko) + ZB (i-synergist)ibhalansi ukusebenza kahle kanye nezindleko.
3. Ngobaokuphezulu obala/ukuguquguqukaizidingo, i-liquid phosphorus-nitrogen FRs (isb, i-Levagard 4090N) ihlala ikhethwa.

I-Sichuan Taifeng New Flame Retardant Co., Ltd.(ISO & REACH)

Email: lucy@taifeng-fr.com