The key role of polyurethane catalysts in the production of spray foam insulation materials

Umgomo wokukhiqiza wezinto zokufakelwa kwe-spray foam

I-Spray Foam Insulation (SPF) iyinto yokushisa ethuthukisiwe eyenziwe ngokuxuba ngokunembile izingxenye ezimbili ezibalulekile - i-polyol resin ne-isocyanate. Uma lezi zingxenye ezimbili zoketshezi zixutshwa kudivayisi ekhethekile yokufutha, kwenzeka ukusabela kwamakhemikhali okusheshayo ngaphansi kwesenzo se-catalyst, bese kukhishwa igesi ye-carbon dioxide ngesikhathi esifanayo, okwenza ingxube yande izikhathi ezingu-30-60 ngemizuzwana eyi-10-15, ekugcineni yakhe i-polyurethane foam enezakhiwo ezinhle kakhulu zokushisa.
Le nqubo yamakhemikhali inezindlela ezimbili eziyinhloko zokusabela:
1. Ukusabela kwejeli: i-isocyanate isabela ne-polyol ukuze yakhe uhlaka lwe-polymer ye-polyurethane
2. Ukusabela kwegwebu: i-isocyanate isabela namanzi ukuze ikhiqize igesi yekhabhoni diokside

Ukusebenza okuhle kakhulu kweI-MXC-BDMAi-catalyst

I-MXC-BDMA yethu (N,N-dimethylbenzylamine, CAS 103-83-3) iyisikhuthazi se-amine esisebenza kahle kakhulu esilungiselelwe i-robust spray foam, enezinzuzo ezilandelayo eziyinhloko:

1. Ukulawula ukusabela okunembile

- Inikeza ibhalansi yokusabela efanelekile ye-foam/gelling (isilinganiso sokusabela singaba neqiniso ku-±3%)
- Iqinisekisa ijika elikhuphukayo elizinzile (ukwehluka kokuphakama kokwanda <5%)
- Ivumelana nezimo zokushisa ezihlukile kanye nomswakama (ukusebenza okuzinzile ebangeni elingu-5-35℃)

2. Ikhwalithi yefoam enhle kakhulu

- Yakha isakhiwo esifanayo samaseli avaliwe (isilinganiso samaseli avaliwe >90%)
- Ububanzi beseli bulawulwa ngebanga elifanele lika-100-300μm
- Kwandisa amandla okubopha nge-substrate ngo-40% (ukuhlolwa kwe-ASTM D1623)

3. Izinzuzo zenqubo

- Kwandisa ukugeleza kokuqala ngo-25%, okuqinisekisa ukugcwaliswa okuphelele kwezakhiwo eziyinkimbinkimbi
- Isikhathi sokulungisa sifinyezwa ngo-15-20%, okuthuthukisa ukusebenza kahle kokwakhiwa.
- Ifomula enephunga eliphansi (i-VOC<50μg/m³) ithuthukisa indawo yokusebenza.

Indima ebalulekileama-catalystekukhiqizweni kwe-SPF.

Njengomqhubi wokusabela ekukhiqizweni kwe-polyurethane, uhlelo lwe-catalyst luqinisekisa ukwakheka kwe-foam esezingeni eliphezulu ngezindlela ezintathu:
1. Ukulawulwa kwe-Kinetic:
- Lawula ngokunembile isikhathi sokuqala kokusabela (ngokuvamile imizuzwana eyi-15-30)
- Lungisa izinga lokushisa eliphezulu kakhulu le-exothermic (ngokuvamile lilawulwa ku-140-160℃)
- Ibhalansi yokukhiqizwa kwegesi kanye nesilinganiso sokupholisa se-polymer
2. Ukulungiswa kwesakhiwo:
- Ama-catalyst e-amine (njenge-MXC-BDMA) alawula ukwakheka kwegesi
- Ama-catalyst ensimbi (njenge-stannous octoate) alawula ukuxhumanisa kwe-polymer
- Ukusetshenziswa kwenhlanganisela kungenza isakhiwo sembobo sibe siphelele
3. Ukuthuthukiswa kokusebenza:
- Thuthukisa ukuzinza kobukhulu (izinga lokushintsha kwevolumu <1%)
- Lungiselela ukuhanjiswa kokushisa (kufika ku-0.020-0.028W/m·K)
- Amandla omshini athuthukisiwe (amandla okucindezela> 150kPa)

Izixazululo zezicelo zemboni

I-MXC-BDMA ifaneleka kakhulu ekukhiqizweni kwe-spray foam ezindaweni ezilandelayo:

Ukushisa kwesakhiwo

- Uhlelo lokuvikela udonga lwangaphandle
- Isendlalelo sokuvikela amanzi esingangeni manzi sophahla
- Iphrojekthi yokuvikela indawo yokugcina izinto ebandayo

Imishini yezimboni

- Ijakethi yokuvikela ipayipi
- Ukuvikelwa kokufakwa kwethangi
- Ukushisa imishini yokucubungula

Indawo ekhethekile

- Ukwakhiwa kwendawo enezinga lokushisa eliphansi (elingaphansi kuka-5℃)
- Ukusetshenziswa ezindaweni ezinomswakama ophezulu (RH>80%)
- Ukufutha okuqondile phezulu nasophahleni

Usekelo lobuchwepheshe lochwepheshe

Sinikeza abakhiqizi be-spray foam nge:
- Isevisi yokwenza ngcono ifomula: Lungisa uhlelo lwe-catalytic ngokuya ngamapharamitha emishini yakho
- Ukuxilongwa kwenqubo: Xazulula izinkinga ezivamile njengokushwabana kwegwebu nokuqhekeka
- Ukuhlolwa kwesampula: Nikeza amaphakethe okuhlola angu-50-100g okuhlolwa okuncane
- Ukuqeqeshwa kobuchwepheshe: Bamba njalo izingqungquthela zobuchwepheshe bokukhiqiza ze-SPF