I-Dibutyltin Dilaurate: I-Catalyst Enemisebenzi Ehlukahlukeneyo
I-Dibutyltin dilaurate, eyaziwa ngokuba yi-DBTDL, sisihluzo esisetyenziswa kakhulu kwishishini leekhemikhali. Sikwintsapho ye-organotin compound kwaye sixatyiswa ngenxa yeempawu zaso zokubangela ukonakala kwiindlela ezahlukeneyo zokusabela kweekhemikhali. Le compound eguquguqukayo ifumene ukusetyenziswa kwiinkqubo ze-polymerization, esterification, kunye ne-transesterification, nto leyo eyenza ukuba ibe yinxalenye ebalulekileyo kwimveliso yeemveliso ezahlukeneyo zoshishino.
Enye yeendlela eziphambili zokusebenzisa i-dibutyltin dilaurate kukwenza imveliso yeefoam ze-polyurethane, ii-coating, kunye nee-adhesives. Kwishishini le-polyurethane, i-DBTDL inceda ukwakheka kwee-urethane linkages, ezibalulekileyo ekuphuhlisweni kwezinto ze-polyurethane ezikumgangatho ophezulu. Umsebenzi wayo wokwenza izinto zisebenze kakuhle uvumela ukuhlanganiswa kweemveliso ze-polyurethane ngokufanelekileyo kunye neempawu ezinqwenelekayo ezifana nokuguquguquka, ukuqina, kunye nokuzinza kobushushu.
Ngaphezu koko,i-dibutyltin dilaurateIsetyenziswa njengesixhobo sokuvuselela ukwenziwa kweeresini zepolyester. Ngokukhuthaza ukwenziwa kwe-esterification kunye neempendulo ze-transesterification, i-DBTDL iququzelela ukuveliswa kwezinto zepolyester ezisetyenziswa ekuvelisweni kweempahla zelaphu, ukupakisha, kunye nezicelo ezahlukeneyo zoshishino. Indima yayo yokuxhasa ezi nkqubo inegalelo ekuphuculeni umgangatho wemveliso kunye nokwenza ngcono ukusebenza kakuhle kwemveliso.
Ukongeza kwindima yayo kwi-polymerization kunye ne-esterification, i-dibutyltin dilaurate isetyenziswa kwimveliso ye-silicone elastomers kunye ne-sealants. Umsebenzi we-catalytic we-DBTDL ubalulekile ekudibaniseni ii-silicone polymers, okukhokelela ekwakhiweni kwezinto ze-elastomeric ezineempawu ezibalaseleyo zoomatshini kunye nokumelana nobushushu kunye neekhemikhali. Ngaphezu koko, i-dibutyltin dilaurate isebenza njengesikhuthazi ekuphelisweni kwe-silicone sealants, okuvumela ukuphuhliswa kweemveliso ze-sealant ezihlala ixesha elide nezimelana nemozulu ezisetyenziswa kakhulu kwizicelo zokwakha kunye neemoto.
Ukuguquguquka kwe-dibutyltin dilaurate kufikelela ekusetyenzisweni kwayo njengesincedisi ekuhlanganiseni izinto eziphakathi kwamayeza kunye neekhemikhali ezintle. Iimpawu zayo zokubangela ukuguquka zidlala indima ebalulekileyo ekuququzeleleni utshintsho oluhlukeneyo lwezinto eziphilayo, kubandakanya i-acylation, i-alkylation, kunye neempendulo zokuxinana, eziziinyathelo ezibalulekileyo ekuvelisweni kweekhompawundi zamayeza kunye neekhemikhali ezikhethekileyo. Ukusetyenziswa kwe-DBTDL njengesincedisi kwezi nkqubo kunceda ekuhlanganiseni ngempumelelo iimveliso zeekhemikhali ezinexabiso eliphezulu kunye nezicelo ezahlukeneyo.
Nangona isetyenziswa kakhulu njengesixhobo sokunceda abantu,i-dibutyltin dilaurateiphakamise iinkxalabo malunga nemiphumo yayo enokubakho kwindalo nakwimpilo. Njengekhompawundi ye-organotin, i-DBTDL ibisoloko ijongwa ngokwemithetho ngenxa yobuthi bayo kunye nokuqhubeka kwayo kwindalo esingqongileyo. Kuye kwenziwa imizamo yokunciphisa impembelelo kwindalo esingqongileyo ye-dibutyltin dilaurate ngokuphuhlisa ezinye ii-catalysts kunye nokuphunyezwa kwemithetho engqongqo elawula ukusetyenziswa kwayo kunye nokulahla kwayo.
Ukuqukumbela, i-dibutyltin dilaurate sisincedisi esibalulekileyo esinezicelo ezahlukeneyo kushishino lweekhemikhali. Indima yaso kwi-polymerization, esterification, synthesis ye-silicone, kunye nokuguqulwa kwezinto eziphilayo igxininisa ukubaluleka kwayo kwimveliso eyahlukeneyo yeemveliso zoshishino kunye nabathengi. Nangona iipropati zayo zokubangela iingxaki zibalulekile ekuqhubeni iinkqubo ezahlukeneyo zeekhemikhali, ukusetyenziswa kunye nolawulo olunenkathalo lwe-dibutyltin dilaurate kubalulekile ekunciphiseni iingozi ezinokubakho kwindalo nakwimpilo ezinxulumene nokusetyenziswa kwayo. Njengoko uphando kunye nokuvelisa izinto ezintsha kuqhubeka, uphuhliso lwee-catalysts ezizinzileyo nezikhuselekileyo luya kuncedisa ekuphuhliseni ishishini leekhemikhali ukuya kwizenzo ezinobuhlobo nokusingqongileyo.
Ixesha leposi: Epreli-19-2024