Mu chemistry ya polima, ma polyol apadera amagwira ntchito ngati zomangira zofunika. Magulu a hydroxyl amachitapo kanthu ndi ma isocyanates kuti apange maulalo amphamvu a urethane. MOFAN imapanga mndandanda wa polyether waukadaulo ndi ma polyethylene glycols apamwamba (PEG) a machitidwe a mafakitale. Mainjiniya a mankhwala amagwiritsa ntchito zigawozi mu insulation yolimba, thovu losinthasintha, ndi polyurethane elastomers.

Kukula kumeneku kukuwonetsa kukula kwachuma kwa ma polyols m'mafakitale opanga zinthu.

Mfundo Zofunika Kwambiri

• Ma polyol apaderaPangani urethane wolimba wolumikizana ndi isocyanates kuti mupange polyurethanes yogwira ntchito bwino.
• Ma polyether polyols amalimbana ndi kuwonongeka kwa madzi bwino kuposa ma polyester polyols m'malo onyowa.
• Ma polyol ogwira ntchito kwambiri amawonjezera kuchulukana kwa crosslink kuti awonjezere kuuma kwa zinthu ndi kukana kutentha.
• Ma diol olemera kwambiri amachepetsa kuchuluka kwa urethane kuti ma sealant azikhala osinthasintha kutentha kwapansi pa zero.
• Ma polyol onunkhira amapereka mphamvu yolimbana ndi kutentha komanso kuchedwa kwa moto pamapanelo olimba oteteza kutentha.
• Ma polyethylene glycols oyera amapereka mafuta osalala komanso oletsa kusinthasintha kwa kutentha m'mafakitale osiyanasiyana opangira zinthu.
• Kuchepa kwa potaziyamu mu zinthu zopangira kumateteza ku zotsatira zoyipa za mankhwala panthawi yopanga mafakitale.

Kumvetsetsa Ma Polyol Apadera mu Chemistry Yamakampani

Kapangidwe ka Mankhwala a Polyether ndi PEG Polymers

Kapangidwe ka akatswiri a mankhwala a polimama polyol apaderakuti apange zinthu zodalirika komanso zolimba. Kapangidwe ka mamolekyulu kamadalira kulumikizana kwa ether komwe kumabweretsa kupirira kwa flexural ndi mphamvu yosinthasintha. Zoyambitsa zomwe zimayambitsa ndi ma ether ozungulira zimapanga maunyolo osiyanasiyana opangidwira mapangidwe amafakitale.

Kusankha pakati pa polyether polyols ndi polyester polyols kumasintha kwambiri kukana kwa msana. Kapangidwe ka polyether kamapereka kukana kwabwino kwambiri ku hydrolytic cleavage m'malo onyowa. Mosiyana ndi zimenezi, kulumikizana kwa ester mu polyester polyols kumapereka kukana kwakukulu kwa makina. MOFAN imapereka polyols yogwira ntchito yomwe imalinganiza kupirira kwa mankhwala ndi machitidwe olondola okonza.

Udindo wa Polyols mu Machitidwe a Polyurethane

Kupanga kwa polyurethane yogwira ntchito kwambiri kumadalira kuwonjezera kwa stoichiometric kwa magulu a hydroxyl ogwira ntchito ku mankhwala ogwirira ntchito omwe amagwira ntchito. Kuyankha koyamba kumachitika pamene gulu la hydroxyl lomaliza limakumana ndi molekyulu ya isocyanate. Gawoli limapanga kulumikizana kwamphamvu kwa urethane pa unyolo wa polima womwe ukukula.

gulu la hydroxyl + isocyanate -> urethane linkage

Ma formulators amaphatikiza ma polyol osiyanasiyana ndi mitundu ina ya isocyanate kuti athetse kuchuluka kwa thovu, kuuma kwa polima, komanso kukana kutentha. Zosakaniza zamadzimadzi zimafuna kuchuluka kwa kayendedwe ka kinetic kuti zisawonongeke msanga panthawi yokonza. Kuwonjezera zowonjezera zolumikizirana kumathandizira nthawi yokonza ndikuwonjezera kulimba komaliza. MOFAN imapereka magiredi apadera aukadaulo omwe amatsimikizira kuti zinthu zikuyenda bwino pazida zopangira zokha.

Magulu Ogwira Ntchito Potengera Kulemera kwa Mamolekyulu ndi Nambala ya Hydroxyl

Ma hydroxyl values ​​amatsogolera kuchulukana kwa ma crosslinking ndi mawonekedwe a ma physical network a thermoset. Zowonjezera zochepa za molecular weight zimakhala ndi ma hydroxyl ochuluka, zomwe zimapangitsa magawo olimba a polymer okhala ndi ma tight crosslink densities. Ma diols okwera a molecular weight amakhala ndi ma hydroxyl ochepa, zomwe zimapangitsa kuti magawo ofewa a elastomeric akhale oyenera ma sealants.

Kusankha manambala oyenera a hydroxyl kumathandiza mainjiniya kusintha kusinthasintha kwa makina ndi momwe amagwirira ntchito molondola. Kulemera kwakukulu kwa mamolekyulu kumachepetsa kuchuluka kwa urethane m'gulu lonse la matrix. Kulemera kochepa kwa mamolekyulu kumawonjezera kuchuluka kwa magawo olimba, kumawonjezera kukana kutentha komanso mphamvu yokakamiza katundu. MOFAN imapanga ma polyol aukadaulo osiyanasiyana kuti akwaniritse zofunikira pakupanga mafakitale.

Mitundu Yofunika Kwambiri ndi Makhalidwe Abwino a Mapangidwe a Polyether

Ma polyol apadera amapereka njira yogwirira ntchito yokonzedwa bwino komanso moyo wautali wautumiki m'mafakitale onse opangira mankhwala.Polyols ya polyetherZili ndi maulumikizidwe a okosijeni mu unyolo wawo wa mamolekyu. Ma ether bond awa amapereka kukhazikika kwabwino kwa hydrolytic m'malo onyowa. Akatswiri a mankhwala nthawi zambiri amasiyanitsa machitidwe awa ndi polyester polyols. Ngakhale polyester polyols imapereka kulimba kwamphamvu kwakuthupi, polyester polyols ilibe kukhazikika kofanana kwa hydrolytic. Polyester polyols imawonongeka mwachangu ikakumana ndi chinyezi chokhazikika. MOFAN imapanga mapangidwe apadera kuti ateteze zigawo zosinthika kuti zisawonongeke ndi madzi komanso kuwonetsedwa kwambiri ndi mankhwala.

Ma Crosslink Ogwira Ntchito Kwambiri ndi Ma Diol Omanga

Kapangidwe ka polima kamadalira kapangidwe ka mamolekyulu koyambirira kuti akwaniritse mawonekedwe osiyana a makina. Ma crosslink ogwirira ntchito kwambiri amapanga maukonde olimba amitundu itatu, pomwe ma diol omangira amapanga maunyolo a polima otalika.

Zolimbikitsa Mgwirizano ndi Mphamvu za Makina

Ma crosslink ogwira ntchito kwambiri amawonjezera kuchuluka kwa malo osinthika a hydroxyl pa molekyulu iliyonse. Kugwira ntchito kwa hydroxyl pakati pa 2.0 ndi 4.0 kumawonjezera kuchuluka kwa ma crosslink panthawi ya polymerization. Kuchuluka kwa ma crosslink kumawonjezera mwachindunji mphamvu yogwirizana, kuuma kwa thupi, komanso mawonekedwe onse a makina. MOFAN imapereka PF-040, PF-450, ndi PF-1050 kuti igwirizane bwino ndi matrix. Zowonjezera izi zimawonjezera kukana kutentha mu zomatira ziwiri, zoyikapo zomangira, ndi zokutira pansi zoteteza.

Ma Diol Otalikira Kwambiri a Machitidwe Otsika a Modulus

Kugwiritsa ntchito ma modulus otsika kumafuna ma polima olunjika okhala ndi kulemera kwakukulu kwa ma molekyulu. Ma diol olemera kwambiri a ma molekyulu monga MOFAN PF-2080 ndi PF-2120 amapereka kusinthasintha kwakukulu komanso kutalika kwakukulu. Ma diol omangidwa awa amachepetsa kuchuluka kwa urethane yonse pamsana wa polima. Kuwerengera kochepa kwa magulu a urethane kumapanga magawo ofewa omwe amasunga kusinthasintha kochepa mpaka -60°C. Opanga amagwiritsa ntchito ma diol olunjika awa kupanga ma joint sealants ndi dynamic polyurethane elastomers.

Magulu Otsegulira Maselo, Ogwira Madzi, ndi Ochita Zinthu Moyenera Kwambiri

Ma grade apadera owonjezera amasintha kapangidwe ka maselo a thovu lamkati ndi momwe zinthu zilili pamwamba. Kugwira ntchito, kuchuluka kwa hydroxyl, ndi kukhuthala kwa ma polyols awa ndizomwe zimayesedwa kwambiri.

Gulu lotsegulira maselo PF-3500 limaletsa kufooka kwa mpweya m'ma thovu osinthasintha otsika. Gulu lophikira madzi PF-010 lili ndi magulu a hydroxyl omwe amagwira ntchito bwino m'ma hydrogels otupa madzi. Gulu lochita zinthu mwachangu PF-2802 limawonjezera mphamvu yong'ambika m'magawo a nsapato zowumbidwa. Ma polyol apaderawa amasunga mawonekedwe okhazikika panthawi yopanga mwachangu.

Mafuta Onunkhira ndi Novolac Polyols Oletsa Kuyaka Moto

Kuteteza kutentha kolimba kumafuna liwiro lofulumira, mphamvu yamphamvu ya kapangidwe kake, komanso kupirira kwambiri moto. Ma polyol onunkhira komanso a novolac amaphatikiza mphete za aromatic mu unyolo waukulu wa polima. Zinthu monga MOFAN PF-800, PF-1380, ndi PF-585 zimapereka mphamvu yabwino kwambiri ya kutentha poyerekeza ndi ma polyol wamba.

Ma polyol onunkhira amachita bwino ndi magulu a isocyanate omwe amagwira ntchito panthawi yokonza thovu lopopera. Netiweki ya polima yomwe imachokera imatulutsa mapangidwe oteteza a polyphenolic pa kutentha kwakukulu. Kuyankha kwa mankhwala kumeneku kumapanga gawo loteteza kutentha panthawi yotenthedwa. Ma bond amphamvu a carbon-carbon amapereka kukana kutentha, kukana mankhwala kwambiri, komanso kuchedwa kwambiri kwa moto. Kugwiritsa ntchito mafakitale kumadalira mabuloko omangira amafuta awa kuti apange mapanelo olimba oteteza kutentha, matabwa a polyisocyanurate, ndi ma elastomer olimba a polyurethane. Zipangizo zomaliza zimapereka moyo wautali, chithandizo chodalirika cha kapangidwe kake, komanso kukana mankhwala kosalekeza m'malo ovuta a mafakitale.

Polyethylene Glycols Yapamwamba Kwambiri Pakupanga Mafakitale

Chidule cha MOFAN PEG Product Series

Polyethylene glycolsamagwira ntchito ngati ma polima osakhala a ionic m'mafakitale osiyanasiyana opangira zinthu. MOFAN imapereka mndandanda wathunthu wa Polyethylene Glycols apamwamba kuyambiraPEG1000 to PEG20000Zipangizo za polyether izi zimakhala ndi magulu a hydroxyl omwe amagwira ntchito. Opanga amagwiritsa ntchito zinthuzi ngati zinthu zotsutsana ndi static, mafuta opangira mafakitale, zinthu zotulutsa, ndi zinthu zopangira zinthu zopangira. Njira zamankhwala zimadalira maunyolo odalirika awa kuti azitha kusunga chinyezi ndi mafuta m'zinthu zomalizidwa.

Mafakitale opanga zinthu amasankha mitundu yeniyeni ya polyglycol kutengera kutalika kwa unyolo wofunikira komanso momwe amagwirira ntchito. Makampani opanga nsalu, mapepala, zitsulo, rabala, ndi mankhwala amagwiritsa ntchito mankhwala a polyether awa kuti apititse patsogolo ntchito yokonza zinthu. Mitundu yochepa ya kulemera kwa mamolekyu imapereka mphamvu yabwino kwambiri yosungunula zinthu komanso kunyowetsa. Mitundu yambiri ya kulemera kwa mamolekyu imapereka kukhuthala kwakukulu kwa thupi komanso mphamvu yomangirira. MOFAN imasintha mtundu uliwonse wa mankhwala kuti ukwaniritse zofunikira zenizeni pazida zopangira zokha.

Miyezo Yoyera ndi Kulamulira Potaziyamu

Kupanga mankhwala kumafuna kuyera kolimba kwa zinthu zopangira kuti zitsimikizire kuchuluka kwa zomwe zimachitika nthawi zonse. Zotsalira zosafunikira za catalyst monga ma ayoni a potaziyamu zimasokoneza machitidwe achilengedwe a mankhwala. MOFAN imalamulira kuchuluka kwa potaziyamu wotsala panthawi yopanga polycondensation. Kuwongolera kuchuluka kwa zitsulo zosafunikira kumaletsa machitidwe osafunikira achiwiri panthawi yopanga polyurethane polymer. Kuipitsidwa kochepa kwa ayoni kumasunga kukhuthala kwamadzimadzi kokhazikika panthawi yosungira.

Magiredi aukadaulo oyeretsa kwambiri amachepetsa zolakwika m'mapangidwe ogwiritsidwa ntchito kumapeto. Ma protocol otsimikizira kuyera amayesa gulu lililonse lazinthu kuti atsimikizire kapangidwe ka mankhwala ndikusunga miyezo yokhwima yaubwino. Zosankha za USP/NF zimakwaniritsa zomwe United States Pharmacopeia imafotokoza pazinthu zachipatala zovuta. Zolemba zonse zotsatizana ndi malamulo zimayenderana ndi magiredi azamankhwala kuti apereke kutsata kwathunthu kwa gulu. Kupezeka kwa USP/NF, Chakudya (E1521), ndi magiredi aukadaulo kumalola mainjiniya kusankha mulingo woyenera wa kuyera kuti akwaniritse zofunikira zenizeni zogwiritsira ntchito.

Mawonekedwe Athupi Kuchokera ku Zakumwa Kupita ku Ufa

Kulemera kwa molekyulu ya polyglycol kumatsimikizira momwe imakhalira pa kutentha kwa chipinda. Maunyolo afupiafupi a polima amakhalabe amadzimadzi, pomwe maunyolo ataliatali amauma kukhala zinthu zolimba ngati sera kapena ufa.

Mafakitale amasankha mitundu yeniyeni kuti agwiritse ntchito bwino njira zopangira. Ufa wophwanyidwa umatuluka mosavuta kudzera m'ma hopper osakaniza owuma okha. Mitundu yamadzimadzi imasakanikirana nthawi yomweyo m'madzi amadzimadzi popanda kutentha. Ma phala olimba pang'ono amapereka mawonekedwe osalala a mafuta pokonzekera mankhwala. MOFAN imapereka mitundu yeniyeni yofanana kuti ikhale yosavuta kusakaniza mankhwala m'mafakitale.

Kugwiritsa Ntchito Ma Polyether ndi Ma PEG Systems mu Mafakitale

Zomatira za Polyurethane, Zomatira, ndi Zophimba

Sankhani ma formulama polyol apaderakupanga zomatira zogwira ntchito kwambiri, zomatira, zokutira zoteteza, ndi zoyikapo zinthu zomangira. Mu machitidwe a CASE, ma polyol ogwirira ntchito limodzi ndi atatu amapanga maukonde otanuka okhala ndi khalidwe lodziwikiratu lochiritsira. Ma formula nthawi zambiri amatchula ma polyether diol ndi ma triol polyol okhala ndi kulemera kwa mamolekyu kuyambira 1000 mpaka 3000 pazinthu zotanuka za polyurethane zomwe sizili thovu. Ma block omangira awa amagwira ntchito amapanga ma dynamic urethane bonds omwe amasunga mphamvu pansi pa kupsinjika kwamakina mobwerezabwereza.

Ma polyol a polyether ochokera ku gwero limodzi amapereka kukhazikika kwa hydrolytic kwambiri poyerekeza ndi mankhwala a polyester m'malo okonzedwa ndi chinyezi. Ma polyether amadzimadzi amakhala osinthasintha kutentha kwa sub-zero chifukwa ali ndi kutentha kochepa kwa kusintha kwa galasi. Mwachitsanzo, ma polypropylene glycol grades amasonyeza kusintha kwa galasi pafupifupi -60°C. Poly(tetramethylene ether) glycol imapereka kutentha kwa kusintha kwa galasi mpaka -75°C. Makhalidwe abwino awa amaletsa ming'alu isanakwane m'ma sealants akunja. Zophimba pansi zamafakitale zimagwiritsa ntchito ma polyols ogwira ntchito kwambiri kuti awonjezere kuchulukana kwa crosslink. Kulumikizana kwakukulu kumapangitsa malo okhuthala omwe amakana kutayikira kwa mankhwala mwamphamvu komanso kusweka kwa makina. Kuphatikiza apo, zomatira ziwiri zimadalira ma resin otsika-kukhuthala kuti anyowetse pamwamba mwachangu. Machitidwe osinthika awa amapanga maulumikizidwe okhazikika a urethane omwe amamangirira zitsulo, mapulasitiki, ndi zinthu zophatikizika bwino. Ma polyurethane elastomers apadera amapereka kulimba kwakukulu kwa rebound m'mawilo amakampani opangidwa ndi zitsulo ndi zidendene zazing'ono za nsapato. Kuphatikiza apo, mapangidwe apadera a polyurethane elastomers amapereka kukana kwapadera kwa misozi pansi pa katundu wolemera.

Mafoam Osinthasintha, Olimba Kwambiri, komanso Olimba Oteteza

Kupanga thovu kumadalira kufananiza magwiridwe antchito a hydroxyl ndi kutalika kwa unyolo ndi zofunikira zaukadaulo. Kupanga thovu lofewa kumagwiritsa ntchito ma polyol a unyolo wautali omwe ali ndi magwiridwe antchito ochepa pakati pa 2 ndi 3. Ma formula amasankha ma polyol apadera okhala ndi kulemera kwa mamolekyu kuyambira 2000 mpaka 7000 kuti apange mapangidwe osinthika a maselo opangira mipando ndi zinthu zofunda. Ma thovu olimba kwambiri amaphatikiza ma polima apadera osinthika kuti awonjezere mphamvu yonyamula katundu komanso kubwereranso kwa maselo. Ma formula ofewa komanso ofewa kwambiri amafunikira zowonjezera zotsegulira maselo kuti zigwirizane ndi kuthamanga kwa mpweya mkati ndikuletsa kuchepa kwa thovu pambuyo poumba. Mapulogalamu amkati mwa magalimoto amagwiritsa ntchito machitidwe osinthika apadera kuti apange mipando yabwino yamagalimoto, zopumira, zopumira mutu, ndi zigawo zoteteza mawu.

Ma thovu olimba oteteza kutentha amafuna milingo yolumikizirana kuti akwaniritse kulimba kwa kapangidwe kake komanso kukhazikika kwa magawo pansi pa kutentha. Ma formulators amagwiritsa ntchito ma polyol okhala ndi magwiridwe antchito opitilira 3 ndi kuchuluka kwa hydroxyl. Kuchuluka kwa ma crosslink kumapangitsa kuti ma cell otsekedwa azikhala ndi mpweya woteteza mkati mwa matrix olimba a polymer. Ma cell olimba awa amapereka kukhazikika kwa hydrolytic kwa nthawi yayitali m'malo akunja. Kukula kwa ma cell osalala kumawonjezera mphamvu yokakamiza yamakina pomwe kumasunga kutentha kochepa m'mapanelo oteteza kutentha amalonda. Magalimoto oyendera mufiriji, zida zamalonda, ndi kupopera kupopera kumadalira makina olimba a polyurethane kuti apewe kusamutsa kutentha. Mapulojekiti omanga amaika ma polyisocyanurate omwe adapangidwa kale kuti achepetse kugwiritsa ntchito mphamvu ya nyumba. Ma thovu olimba opangidwanso amaperekanso njira zopakira zida zamagetsi zosalimba.

Kugwiritsa Ntchito PEG mu Nsalu, Rabala, ndi Mankhwala

Ma polima a polyethylene glycol amagwira ntchito ngati njira zosiyanasiyana zothandizira kukonza zinthu zopanda ma ionic m'mafakitale osiyanasiyana. Ma grade osiyanasiyana a kulemera kwa mamolekyu amapereka mawonekedwe osiyana pantchito zopangira.

• Kukonza Nsalu:Mitundu yamadzimadzi monga PEG-200 imagwira ntchito ngati zofewetsa komanso zoletsa kutentha. Mitundu yapakati monga PEG-400, 600, ndi 800 imagwira ntchito ngati mafuta odzola ndi zonyowetsa panthawi yomaliza ulusi. Mitundu yolemera kwambiri ya mamolekyu monga PEG-4000 imagwira ntchito ngati zomatira zomangira ndi zofewetsa.
• Kupanga Rabala:PEG-1000 ndi 1500 zimagwira ntchito ngati zotulutsira mpweya zomwe zimalimbikitsa kufalikira bwino kwa mpweya komanso kufalikira kwa mpweya wakuda. Mitundu yolimba monga PEG-4000 ndi 8000 imagwira ntchito ngati zotulutsira nkhungu, mafuta odzola, ndi zoziziritsira.
• Mankhwala Opangira Mankhwala:Ma polyol osungunuka m'madzi amagwira ntchito ngati zinthu zowonjezerera komanso zinthu zogwira ntchito m'zachipatala. Zipangizo zoyeretsedwazi zimawonjezera kusungunuka kwa mankhwala, kugwira ntchito bwino kwa ma binder, komanso kugwira ntchito bwino popereka mankhwala pakamwa komanso pakhungu.

Njira zopangira zitsulo zamafakitale zimadalira ma polyethylene glycols kuti azizire, azipaka mafuta, komanso azitenthetsera. Opanga mapepala amagwiritsa ntchito njira za polyglycol kuti azisunga chinyezi ndikuwonjezera kusalala kwa pamwamba. Zowonjezera izi zimathandiza kuti mankhwala azikhala olimba m'malo osambira okhala ndi acidic ndi alkaline. Ntchito zamafakitale zamakono zimasankha zolemera zinazake za polima kuti ziwongolere liwiro lokonza ndi ubwino wa zinthu.

Zofunikira Zosankha za MOFAN Special Polyols

Kufananiza Makhalidwe a Hydroxyl ndi Magwiridwe Antchito ndi Zosowa za Ntchito

Kusankha bwino kwa polyol kumafuna kufananiza manambala a hydroxyl ndi magwiridwe antchito kuti zigwirizane ndi ziyerekezo zakuthupi. Kugwira ntchito kumatsimikiza kapangidwe ka crosslinking ka netiweki yochiritsidwa. Ma hydroxyl values ​​amawerengera kuchuluka kwa hydroxyl komwe kumagwira ntchito pa unit iliyonse ya unyinji. Ma hydroxyl otsika omwe ali ndi magwiridwe antchito pakati pa 2 ndi 3 amapanga ma network otanuka. Ma hydroxyl apamwamba omwe ali ndi magwiridwe antchito pakati pa 4 ndi 8 amapanga mapangidwe olimba a thermoset. Ma formulators amawunika ziyerekezozi kuti agwirizane ndi mawonekedwe omaliza a makina. Mwachitsanzo, polyol ya polyether yokhala ndi hydroxyl value ya 150 mg KOH/g ndi kulemera kwapakati kwa molekyulu ya 1200 g/mol imawonetsa magwiridwe antchito pafupifupi 3.2. Ma formulators amagwiritsa ntchito giredi yeniyeniyi popanga ma panel a thovu osasunthika a mapanelo amkati mwa magalimoto.

Kukonza Kukhuthala, Kuchitapo Kanthu, ndi Kuchiritsa Kinetics

Kupambana kwa ntchito kumadalira momwe madzi amayendera bwino komanso liwiro la kuchira. Kusankha ma polyol amadzimadzi okhala ndi kulemera koyenera kwa mamolekyulu kumawongolera kukhuthala kwa maziko. Ma formula amawonjezera calcium carbonate yokhazikika pa 20-40 wt.% kuti apange kukana kwa kutsika. Kuphatikiza apo, kuwonjezera fumed silica pa 2-5 wt.% kumapereka khalidwe lamphamvu la thixotropic kuti lisagwedezeke pa substrates zoyima. Kupanga ma prepolymers okhala ndi isocyanate ndi hydroxyl ratio pakati pa 1.8:1 ndi 2.5:1 kumathandiza kukhazikika kwa kukhuthala kwa dongosolo. Kusankha mosamala ma polyol kumapangitsa kuti magwiridwe antchito azisinthasintha pazida zodziperekera zokha.

Ma catalyst a Organotin monga DBTDL pa 0.01-0.1 wt.% loading amayambitsa kuchuluka kwa reaction komwe kumadziwikiratu. Zowonjezera izi zimalimbikitsa mapangidwe a urethane kuti ateteze malo opanda tack mkati mwa mphindi 30 mpaka 90. Ma catalyst a Tertiary amine amakonda kufulumizitsa ma profiles ochiritsa mu polyurethane systems. Kugwirizanitsa ma catalyst ogwira ntchito ndi ma polyol ogwira ntchito kumaletsa mapangidwe a void mu zigawo zowumbidwa zokhuthala.

Kulimbitsa Kukhazikika kwa Kutentha ndi Kukana Kwachilengedwe

Kusankha mafupa a msana kumalamulira kukhazikika kwa hydrolytic ndi kukana mankhwala kwa nthawi yayitali. Ma polyether polyols amasunga kukhazikika kwa hydrolytic bwino, kupirira maola opitilira 2000 pa chinyezi cha 95% ndi 70°C popanda kutayika kwakukulu kwa katundu. Mosiyana ndi zimenezi, ma polyester polyols amawonongeka mwachangu pansi pa chinyezi chambiri chifukwa chinyezi chimawononga ma ester. Kusankha ma polyols ena m'malo mwa ma polyester polyols kumawonjezera kukana kwa madzi mu ma polyurethane elastomers. Ma polyols apadera amapereka kukana kwabwino kwa mankhwala m'malo ovuta a mafakitale. Ma polyols apadera a polybutadiene amasunga kulemera kopitilira 98.5% panthawi yowonekera nthawi zonse pa 100°C kwa maola 1000, kusunga kusiyana kwa elastic modulus pansi pa 100%.

Ma backbone onunkhira bwino amapereka mphamvu yolimba ya kutentha kuti isatenthe kwambiri kuchokera ku mitundu ya isocyanate yomwe sinachite bwino. Zosankha za Aliphatic zimaletsa kusintha kwa mtundu wa UV. Ma formula amawonjezera ma antioxidants pa 0.5–1.5 wt% kuti apititse patsogolo kukana kwa okosijeni kwa nthawi yayitali. Kuwonjezera ma UV stabilizers pa 0.5–2.0 wt% kumateteza zinthu zakunja ku kuwonongeka kwa mphamvu ya dzuwa. Kusankha polyol koyenera kumatsimikizira kuti ma polyol apadera opangidwa mwamakonda amasunga zinthu zofunika za polyurethane pa ntchito zosiyanasiyana zakunja.

MOFAN special polyolsndi mndandanda wapamwamba wa polyethylene glycol umapereka phindu loyambira paukadaulo wamakono wa polima. Mapangidwe olondola a mamolekyulu amalola ma polyols kukonza reaction kinetics ndi mphamvu ya netiweki yeniyeni. Kapangidwe kazinthu koyenera kamathandizira mwachindunji magwiridwe antchito azinthu mu zomatira za polyurethane, zomangira zomangira, ma elastomer amphamvu, ndi ma thovu olimba oteteza kutentha. Ma formulators amakhazikitsa kukana kwa mankhwala, kukhazikika kwa kutentha, komanso kulimba kwa makina kudzera mu chemistry yoyendetsedwa bwino. Ntchito zokonzera mafakitale zimakwaniritsa bwino kwambiri popanga ndi mayankho a mankhwala oyeretsa awa m'mizere yosiyanasiyana yopangira. Makasitomala amakampani akuitanidwa kuti akalankhule ndi akatswiri aukadaulo a MOFAN kuti apange mapangidwe apadera, kuthana ndi zolinga zolimba zokonzera, ndikulandira chithandizo chodzipereka pazofunikira zovuta zopangira.

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