Ukufakelwa kwefoam etshizwayo sisixhobo sokufakelwa esisebenziseka lula nesisebenza kakuhle kakhulu esenziwe nge-chemical reaction yezinto ezimbini eziphambili (i-polyol resin kunye ne-isocyanate). Xa zidityanisiwe, ezi zinto zimbini zisabela zenze i-polyurethane foam enkulu evala kwaye igqume imiphezulu ngempumelelo. Imfuno ekhulayo yokufakelwa kwefoam esebenza kakuhle kwiindawo zokuhlala, zorhwebo kunye nemizi-mveliso ikhokelele ekwandeni kokusetyenziswa kwe-spray foam insulation ene-insulation ephezulu, ukumelana nokufuma kunye nenkxaso yesakhiwo.
Indlela Eyenziwa Ngayo I-Spray Foam Insulation
Ukuveliswa kwe-spray foam insulation kuxhomekeke kakhulu kunxibelelwano phakathi kwe-polyols kunye ne-isocyanates, ezikhula ukuze zizalise indawo kwaye ziqine zibe yi-insulation foam emva kokutshiza. Nangona kunjalo, le nkqubo ifuna ulawulo oluchanekileyo ukuqinisekisa uxinano oluchanekileyo lwe-foam, ulwakhiwo kunye nokufana. Apha,i-polyurethane catalystidlala indima ephambili ekuqhubeni nasekulawuleni impendulo.
Indima yeeCatalysts kwiMveliso yePolyurethane Foam
IiCatalysts zibalulekile ekuvelisweni kweepolyurethanes kuba zonyusa kakhulu izinga lokusabela kwaye zilawula ixesha lejeli, nto leyo ebalulekileyo ekufezekiseni ulwandiso olufanelekileyo lwefoam. I-catalyst inokulawula neempendulo zesibini, ezifana nokusabela kwamanzi, okukhupha igesi efunekayo ukuqala iqamza. Ibhalansi phakathi kwezi mpendulo ibalulekile ekuvelisweni kwezakhiwo zefoam ezifanayo ezinesakhiwo seseli kunye neempawu ezifanayo. Kwimveliso yepolyurethane, ii-catalysts ngokubanzi zahlulwe zibe ziindidi ezimbini:ii-catalysts ze-aminekwayeiikhatalyst ze-organometallic(ezifana ne-organotin, i-bismuth, kunye ne-zinc).
I-MXC-TMA kunye ne-MXC-BDMA: IiCatalysts zokukhusela i-Spray Foam
IikhatalystI-MXC-TMAkwayeI-MXC-BDMAzinezibonelelo ezicacileyo ekuvelisweni kwe-spray foam insulation.I-MXC-TMAlulwelo olungenambala ukuya koluphuzi olukhanyayo olukhuthaza ukuhluzwa kwe-polyisocyanurate ukuze yenze i-rise curve efanayo nelawulwayo. I-catalyst isetyenziswa kakhulu kwi-rigid foams ezifuna ukugeleza okuphuculweyo kunye nokulungiswa rhoqo, kwaye lukhetho olufanelekileyo kwizicelo zokufaka ubushushu ezifuna ukuqina kwesakhiwo.
Kwelinye icala,I-MXC-BDMA(N, N-dimethylbenzylamine, inombolo yeCAS 103-83-3) sisincedisi se-benzyldimethylamine esisetyenziswa kakhulu kwizicelo ze-foam eqinileyo. Siphucula ukugeleza kwe-foam kwangoko, senze imingxunya efanayo ye-bubbles kwaye siqinisekisa ukubopha okuqinileyo kwi-substrate. Oku kwenza i-MXC-BDMA ifaneleke kwiimfuno zokukhusela eziphezulu kwizicelo ze-spray foam, apho isakhiwo se-foam esizinzileyo, esihlala ixesha elide nesinamathelayo sibalulekile.
Isiphelo
Ii-catalysts ze-polyurethane ezifana ne-MXC-TMA kunye ne-MXC-BDMA zibalulekile ekufezekiseni umgangatho wezixhobo zokukhusela i-foam yokutshiza. Iimpawu zazo ezizodwa zivumela ulawulo oluchanekileyo lokwakheka kwe-foam, ukuqinisekisa ukusebenza okuthembekileyo kwe-insulation kwiindlela ezahlukeneyo zokusebenza. Njengoko imfuno yezisombululo zokukhusela ezisebenzisa amandla ngokugqithisileyo iqhubeka ikhula, ii-catalysts ze-polyurethane eziphambili ziyaqhubeka nokudlala indima ebalulekileyo ekuboneleleni nge-insulation ye-foam yokutshiza esemgangathweni ophezulu nehlala ixesha elide.
Ixesha leposi: Novemba-06-2024