I loko o ke kemika polymer, lawelawe nā polyols kūikawā ma ke ʻano he mau poloka kūkulu koʻikoʻi. Hoʻopili nā hui Hydroxyl me nā isocyanates e hana i nā loulou urethane ikaika. Hana ʻo MOFAN i nā moʻo polyether loea a me nā polyethylene glycols kiʻekiʻe (PEG) no nā ʻōnaehana ʻoihana. Hoʻohana nā ʻenekinia kemika i kēia mau ʻāpana i ka insulation paʻa, ka huʻa palupalu, a me nā elastomers polyurethane.

Hōʻike kēia ulu ʻana i ka pae hoʻokele waiwai o nā polyols ma o ka hana ʻana i nā ʻoihana.

Nā Manaʻo Koʻikoʻi

• Nā polyols kūikawāhana i nā loulou urethane ikaika me nā isocyanates e hana i nā polyurethanes hana kiʻekiʻe.
• ʻOi aku ka maikaʻi o ke kūpaʻa ʻana o nā polyether polyols i ka pōʻino o ka wai ma mua o nā polyester polyols i nā wahi pulu.
• Hoʻonui nā polyols hana kiʻekiʻe i ka nui o ka crosslink e hoʻokiʻekiʻe i ka paʻakikī o ka mea a me ke kūpaʻa wela.
• Hoʻohaʻahaʻa nā diols kaumaha molekala kiʻekiʻe i ka helu urethane e mālama i nā mea hoʻopaʻa i ke ʻano palupalu i nā mahana ma lalo o ka zero.
• Hāʻawi nā polyols ʻala i ke kūpaʻa wela ikaika a me ka pale ʻana i ka lapalapa no nā panela hoʻopaʻa wela paʻa.
• Hāʻawi nā polyethylene glycols maʻemaʻe i ka lubrication maʻemaʻe a me ka kaohi antistatic ma nā ʻoihana hana like ʻole.
• Pale aku nā pae potassium haʻahaʻa i nā mea maka i nā hopena kemika i makemake ʻole ʻia i ka wā o ka hana ʻana ma ka hale hana.

Ke hoʻomaopopo nei i nā Polyols kūikawā i ka Kemika ʻoihana

ʻAno Kemika o ka Polyether a me nā Polymers PEG

Hoʻolālā nā mea kemika polymernā polyols kūikawāe kūkulu i nā mea hilinaʻi a paʻa. Hilinaʻi ke ʻano molekala i nā loulou ether hou e hāʻawi ana i ke ahonui flexural a me ka ikaika dynamic. ʻO ka hana ʻana i nā mea hoʻomaka me nā ethers cyclic e hana i nā kaulahao like ʻole i hana ʻia no nā ʻano hana ʻoihana.

ʻO ke koho ʻana ma waena o nā polyols polyether a me nā polyols polyester e hoʻololi nui i ke kū'ē ʻana o ke kuamoʻo. Hāʻawi nā ʻano Polyether i ke kū'ē maikaʻi loa i ka ʻoki hydrolytic i nā hoʻonohonoho humid. I ka ʻaoʻao ʻē aʻe, hāʻawi nā loulou ester i loko o nā polyols polyester i ke kū'ē ʻana i ka abrasion mechanical kiʻekiʻe. Hāʻawi ʻo MOFAN i nā polyols hana e kaulike i ke ahonui kemika me ke ʻano hana pololei.

Ke kuleana o Polyols i nā ʻōnaehana Polyurethane

ʻO ka hana ʻana o ka polyurethane hana kiʻekiʻe e pili ana i ka hoʻohui stoichiometric o nā hui hydroxyl ikaika i nā hui hana reactive. Hana ʻia ka hopena mua ke hālāwai kahi hui hydroxyl hope me kahi mole isocyanate. Hoʻokumu kēia ʻanuʻu i kahi pilina urethane ikaika ma ke kaulahao polymer e ulu ana.

hui hydroxyl + isocyanate -> loulou urethane

Hoʻohui nā mea hoʻohuihui i nā polyols like ʻole me nā ʻano isocyanate kikoʻī e kāohi i ka nui o ka huʻa, ka paʻakikī o ka polymer, a me ke kūpaʻa wela. Pono nā hui resin wai i nā helu hopena kinetic kaulike e pale aku i ka gelling mua i ka wā e hana ai. ʻO ka hoʻohui ʻana i nā mea hoʻohui crosslinking e hoʻolalelale i nā papa hana hoʻōla a hoʻomaikaʻi i ka paʻa paʻa hope loa. Hāʻawi ʻo MOFAN i nā māka loea kūikawā e hōʻoia i ka hana mau ʻana ma nā lako hana hana automated.

Nā Hoʻokaʻawale Hana e ke Kaumaha Molekala a me ka Helu Hydroxyl

Hoʻokele nā ​​waiwai Hydroxyl i ka nui o ke crosslinking a me nā waiwai kino o nā pūnaewele thermoset i hoʻōla ʻia. Loaʻa i nā mea hoʻohui kaumaha molekala haʻahaʻa nā helu hydroxyl kiʻekiʻe, e hana ana i nā ʻāpana polymer paʻa me nā densities crosslink paʻa. Loaʻa i nā diols kaumaha molekala kiʻekiʻe nā helu hydroxyl haʻahaʻa, e loaʻa ana nā ʻāpana elastomeric palupalu i kūpono no nā sealant.

ʻO ke koho ʻana i nā helu hydroxyl kūpono e hiki ai i nā ʻenekinia ke hoʻopilikino i ka maʻalahi o ka mīkini a me ke ʻano tensile me ka pololei. ʻO nā kaumaha molekala kiʻekiʻe e hōʻemi i ka nui o ka hui urethane i loko o ka matrix. Hoʻonui nā kaumaha molekala haʻahaʻa i ka ʻike ʻāpana paʻakikī, e hoʻonui ana i ke kūpaʻa wela a me ka hiki ke hoʻouka compressive. Hana ʻo MOFAN i nā polyols loea ma nā kaumaha molekala ākea e hoʻokō i nā koi hana ʻoihana kikoʻī.

Nā ʻAno Koʻikoʻi a me nā Waiwai Kino o nā Hoʻohui Polyether

Hāʻawi nā polyols kūikawā i ke ʻano hana i hana kūikawā ʻia a me ke ola lawelawe paʻa ma nā noi kemika ʻoihana.Nā polyols polyetherLoaʻa nā pilina oxygen i loko o kā lākou kaulahao molekala. Hāʻawi kēia mau pilina ether i ke kūpaʻa hydrolytic maikaʻi loa i nā wahi hana pulu. Hoʻohālikelike pinepine nā ʻenekinia kemika i kēia mau ʻōnaehana me nā polyester polyols. ʻOiai ʻo polyester polyols e hāʻawi i ka paʻakikī kino ikaika, ʻaʻohe kūlike o ka paʻa hydrolytic o nā polyester polyols. Hoʻohaʻahaʻa wikiwiki nā polyester polyols i ka wā e hōʻike ʻia ai i ka makū mau. Hoʻolālā ʻo MOFAN i nā ʻano hana kūikawā e pale i nā ʻāpana ikaika mai ka hōʻino ʻana o ka wai a me ka hōʻike kemika koʻikoʻi.

Nā Crosslinkers Hana Kiʻekiʻe a me nā Diols Kūkulu

Hilinaʻi nā ʻano polymer i ka hoʻolālā molekala mua e hoʻokō i nā waiwai mechanical ʻokoʻa. Kūkulu nā crosslinkers hana kiʻekiʻe i nā pūnaewele ʻekolu-dimensional paʻa, ʻoiai ʻo nā diols hoʻonohonoho e hana i nā kaulahao polymer linear i hoʻonui ʻia.

Nā mea hoʻonui i ka hoʻohuihui a me ka ikaika mīkini

Hoʻonui nā crosslinkers hana kiʻekiʻe i ka helu o nā wahi hydroxyl reactive no kēlā me kēia mole. Hoʻonui ka hana Hydroxyl ma waena o 2.0 a me 4.0 i ka nui o ka crosslink i ka wā polymerization. Hoʻomaikaʻi pololei ka nui o ka crosslink i ka ikaika cohesive, ka paʻakikī kino, a me nā waiwai mechanical holoʻokoʻa. Hoʻolako ʻo MOFAN iā PF-040, PF-450, a me PF-1050 e hoʻomaikaʻi i ka cohesion matrix. Hoʻonui kēia mau mea hoʻohui i ke kūpaʻa wela i nā mea hoʻopili ʻelua-ʻāpana, nā mea hoʻoheheʻe kūkulu, a me nā uhi papahele pale.

Nā Diols Elongation Kiʻekiʻe no nā ʻōnaehana Modulus Haʻahaʻa

Pono nā noi modulus haʻahaʻa i nā polymers linear me nā kaumaha molekala kiʻekiʻe. Hāʻawi nā diols kaumaha molekala kiʻekiʻe e like me MOFAN PF-2080 a me PF-2120 i ka maʻalahi kupaianaha a me ka elongation kiʻekiʻe. Hoʻohaʻahaʻa kēia mau diols structural i ka nui o ka urethane ma ke kuamoʻo polymer. ʻO ka helu haʻahaʻa o nā hui urethane e hana i nā ʻāpana palupalu e mālama i ka maʻalahi o ka mahana haʻahaʻa a hiki i -60°C. Hoʻohana nā mea hoʻohālikelike i kēia mau diols linear e hana i nā sealant hui a me nā elastomers polyurethane dynamic.

Nā Mea Wehe Kelepona, Hydrophilic, a me nā Papa Reactivity Kiʻekiʻe

Hoʻololi nā papa hoʻohui kūikawā i nā ʻano o nā cell huʻa kūloko a me nā kinetics o ka hopena o ka ʻili. ʻO ka hana, nā waiwai hydroxyl, a me ka viscosity e lawelawe ma ke ʻano he mau ana mua e hoʻokaʻawale i kēia mau polyols kūikawā.

ʻO ka papa wehe-kelepona PF-3500 e pale aku i ka emi ʻana o ka pneumatic i loko o nā huʻa palupalu haʻahaʻa. Loaʻa i ka papa hydrophilic PF-010 nā hui hydroxyl hana e hana maʻalahi i loko o nā hydrogels e pehu ana i ka wai. Hoʻonui ka papa reactivity kiʻekiʻe PF-2802 i ka ikaika haehae i nā ʻōpae kāmaʻa i hoʻoheheʻe ʻia. Mālama kēia mau polyols kūikawā i nā waiwai kino paʻa i ka wā o nā pōʻaiapuni hana wikiwiki.

ʻO Aromatic a me Novolac Polyols no ka pale ʻana i ka lapalapa

Pono ka pale wela paʻa i ka wikiwiki o ka hana ʻana, ka ikaika kūkulu ikaika, a me ke kūpaʻa ahi koʻikoʻi. Hoʻokomo nā polyols ʻala a me nā novolac i nā apo ʻala i loko o ke kaulahao polymer nui. Hāʻawi nā huahana e like me MOFAN PF-800, PF-1380, a me PF-585 i ka hana wela maikaʻi loa i hoʻohālikelike ʻia me nā polyols maʻamau.

Hoʻopili maikaʻi nā polyols ʻala me nā hui isocyanate ikaika i ka wā o ka hana ʻana i ka huʻa pīpī. Hoʻokuʻu ka pūnaewele polymer hopena i nā ʻano polyphenolic pale i nā mahana kiʻekiʻe. Hoʻokumu kēia pane kemika i kahi papa char pale i ka wā o ka hōʻike wela. Hāʻawi nā pilina kalapona-kalapona ikaika i ke kūpaʻa wela, ke kūpaʻa kemika koʻikoʻi, a me ka pale ʻana i ka lapalapa koʻikoʻi. Hilinaʻi nā noi ʻoihana i kēia mau poloka hale ʻala no nā panela insulation paʻa, nā papa polyisocyanurate, a me nā elastomers polyurethane paʻa. Hāʻawi nā mea hope loa i ke ola lawelawe lōʻihi, ke kākoʻo kūkulu hilinaʻi, a me ke kūpaʻa kemika mau i nā ʻano ʻoihana ikaika.

ʻOi aku ka maikaʻi o nā Polyethylene Glycols ma ka hana ʻana i nā ʻoihana

ʻIkepili o ka MOFAN PEG Product Series

Nā glycols polyethylenelawelawe ma ke ʻano he mau polymers non-ionic versatile ma nā ʻoihana hana like ʻole. Hāʻawi ʻo MOFAN i kahi moʻo piha o nā Polyethylene Glycols kiʻekiʻe maiPEG1000 to PEG20000. Loaʻa i kēia mau mea polyether linear nā hui hydroxyl terminal ikaika. Hoʻohana nā mea hana i kēia mau huahana ma ke ʻano he mau mea antistatic, nā lubricants ʻoihana, nā mea hoʻokuʻu, a me nā mea waena maka. Hilinaʻi nā kaʻina hana kemika i kēia mau kaulahao hilinaʻi e kāohi i ka paʻa ʻana o ka makū a me ka lubricity i nā huahana i hoʻopau ʻia.

Koho nā mea hoʻohui ʻoihana i nā papa polyglycol kikoʻī e pili ana i nā lōʻihi kaulahao e pono ai a me nā waiwai hana. Hoʻohana nā ʻoihana lole, pepa, hana metala, laholio, a me nā lāʻau lapaʻau i kēia mau hui polyether e hoʻomaikaʻi i ka pono hana. Hāʻawi nā papa kaumaha molekala haʻahaʻa i ka solvency maikaʻi loa a me ka hana hoʻomaʻū. Hāʻawi nā papa kaumaha molekala kiʻekiʻe i ka viscosity kino kiʻekiʻe a me ka hiki ke hoʻopaʻa ikaika. Hoʻopilikino ʻo MOFAN i kēlā me kēia papa kemika e hoʻokō i nā kikoʻī kino koʻikoʻi ma waena o nā lako hana hana automated.

Nā Kūlana Maʻemaʻe a me ka Mana Potassium

Pono ka synthesis kemika i ka maʻemaʻe o nā mea maka e hōʻoia i ka nui o ka hopena batch hiki ke hana hou ʻia. ʻO nā koena catalyst i makemake ʻole ʻia e like me nā ion potassium e hoʻopilikia i nā hopena kemika koʻikoʻi. Hoʻomalu ʻo MOFAN i nā pae potassium i koe i ka wā o nā kaʻina hana polycondensation. ʻO ka hoʻomalu ʻana i nā pae metala trace e pale aku i nā hopena lua i makemake ʻole ʻia i ka wā o ka synthesis polymer polymer polymer. Mālama ka liʻiliʻi o ka haumia ionic i ka viscosity wai paʻa i ka wā e mālama ai.

Hoʻemi nā papa loea kiʻekiʻe-maʻemaʻe i nā hemahema kūkulu i nā ʻano hana hoʻohana hope loa. Hoʻāʻo nā protocols hōʻoia maʻemaʻe i kēlā me kēia pūʻulu huahana e hōʻoia i ka haku mele kemika a mālama i nā kūlana maikaʻi koʻikoʻi. Hoʻokō nā koho papa USP/NF i nā kikoʻī monograph ʻAmelika Hui Pū ʻIa Pharmacopeia no nā huahana lapaʻau palupalu. Hele pū ka palapala hoʻokō piha me nā papa lāʻau lapaʻau e hāʻawi i ka hiki ke hahai piha ʻia. ʻO ka loaʻa ʻana o USP/NF, Food (E1521), a me nā papa loea e hiki ai i nā ʻenekinia ke koho i ka pae maʻemaʻe kūpono no nā koi noi pololei.

Nā ʻAno Kino mai nā Wai a i nā Pauka

ʻO ke kaumaha molekala o kahi polyglycol e hoʻoholo i kona kūlana kino i ka mahana o ka lumi. ʻO nā kaulahao polymer pōkole e noho mau i nā wai wai, ʻoiai nā kaulahao lōʻihi e paʻa i nā mea paʻa waxy a i ʻole nā ​​​​pauka.

Koho nā mea hana i nā ʻano kino e hoʻomaikaʻi i nā ʻano hana hana. Kahe manuahi nā pauka i wili ʻia ma o nā hoppers hoʻohuihui maloʻo aunoa. Hoʻohui koke ʻia nā ʻano wai i loko o nā kahawai kemika wai me ka ʻole o ka hoʻokomo ʻana o ka wela. Hāʻawi nā paʻi semi-paʻa i nā ʻano poni laumania i ka hoʻomākaukau ʻana i nā lāʻau lapaʻau. Hāʻawi ʻo MOFAN i nā ʻano kino kūlike e hoʻomaʻamaʻa i ka hoʻohuihui kemika ʻoihana.

Nā noi ʻoihana o nā ʻōnaehana Polyether a me PEG

Nā mea hoʻopili Polyurethane, nā mea sila, a me nā uhi

Koho nā mea hoʻohuinā polyols kūikawāe hana i nā mea hoʻopili hana kiʻekiʻe, nā mea hoʻopaʻa, nā uhi pale, a me nā hoʻoheheʻe kūkulu. I loko o nā ʻōnaehana CASE, kūkulu nā polyols di-functional a me tri-functional i nā pūnaewele elastic me ke ʻano hoʻōla i wānana ʻia. Hoʻākāka pinepine nā mea hoʻohālikelike i nā polyether diol a me nā polyols triol me nā kaumaha molekala mai 1000 a 3000 no nā mea polyurethane non-foam elastic. Hoʻokumu kēia mau poloka hale hana i nā pilina urethane ikaika e mālama i ka ikaika ma lalo o ke kaumaha mechanical repetitive.

Hāʻawi nā polyols polyether kumu hoʻokahi i ke kūpaʻa hydrolytic kiʻekiʻe i hoʻohālikelike ʻia me ka kemika polyester i nā wahi hana humid. Mālama nā papa polyether wai i ka maʻalahi ma nā mahana sub-zero no ka mea he haʻahaʻa ko lākou mau mahana hoʻololi aniani. No ka laʻana, hōʻike nā papa polypropylene glycol i nā waiwai hoʻololi aniani kokoke i -60°C. Hāʻawi ka Poly(tetramethylene ether) glycol i nā mahana hoʻololi aniani a hiki i -75°C. Pale kēia mau waiwai hana i ka haki mua ʻana i nā sila hui waho. Hoʻohana nā uhi papahele ʻoihana i nā polyols hana kiʻekiʻe e hoʻonui i ka nui o ka crosslink. Hoʻokumu ka crosslinking kiʻekiʻe i nā ʻili mānoanoa e kūʻē i nā ninini kemika ikaika a me ka abrasion mechanical. Eia kekahi, hilinaʻi nā mea hoʻopili ʻelua-ʻāpana i nā resins viscosity haʻahaʻa no ka pulu wikiwiki ʻana o ka ʻili. Hoʻokumu kēia mau ʻōnaehana reactive i nā loulou urethane paʻa e hoʻopaʻa pono i nā metala, nā plastics, a me nā composites structural. Hāʻawi nā elastomers polyurethane kūikawā i ka paʻakikī rebound kiʻekiʻe i nā huila ʻoihana i hoʻolei ʻia a me nā kapuaʻi kāmaʻa microcellular. Eia kekahi, hāʻawi nā ʻano hana maʻamau no nā elastomers polyurethane i ka pale ʻana i ka haehae koʻikoʻi ma lalo o nā ukana ikaika.

Nā Huʻa Hoʻokaʻawale Maʻalahi, Kūpaʻa Kiʻekiʻe, a me Paʻa

Hilinaʻi ka hana ʻana i ka huʻa ma ka hoʻohālikelike ʻana i ka hana hydroxyl a me ka lōʻihi o ke kaulahao i nā koi loea kikoʻī. Hoʻohana ka hana ʻana i ka huʻa slabstock palupalu i nā polyols kaulahao lōʻihi me ka hana haʻahaʻa ma waena o 2 a me 3. Koho nā mea hana i nā polyols kūikawā me nā kaumaha molekala mai 2000 a 7000 e hana i nā ʻano cellular maʻalahi no nā huahana cushioning lako a me nā huahana moe. Hoʻohui nā huʻa kūpaʻa kiʻekiʻe i nā polymers reactive kūikawā e hoʻonui i ka hiki ke lawe i ka ukana a me ka rebound cell. Pono nā ʻano palupalu a me nā hypersoft i nā mea hoʻohui wehe cell e kaulike i ke kaomi pneumatic kūloko a pale i ka emi ʻana o ka huʻa ma hope o ka hoʻoheheʻe ʻana. Hoʻohana nā noi kūloko kaʻa i nā ʻōnaehana maʻalahi maʻamau e kūkulu i nā noho kaʻa ʻoluʻolu, nā lima lima, nā poʻo, a me nā papa acoustic insulating leo.

Koi nā huʻa hoʻopaʻa wela paʻa i nā pae crosslinking kiʻekiʻe e hoʻokō ai i ka paʻa o ke ʻano a me ke kūpaʻa dimensional ma lalo o nā ukana thermal. Hoʻohana nā mea hoʻohālikelike i nā polyols me nā waiwai hana ma luna o 3 a me nā helu hydroxyl kiʻekiʻe. Hoʻokumu ka nui o ka crosslink kiʻekiʻe i nā ʻano cell pani e hoʻopaʻa ana i nā kinoea insulating i loko o ka matrix polymer paʻa. Hāʻawi kēia mau ʻano cell paʻa i ka paʻa hydrolytic lōʻihi i nā kūlana kaiapuni waho. Hoʻomaikaʻi nā nui cell maikaʻi i ka ikaika compressive mechanical me ka mālama ʻana i ka conductivity thermal haʻahaʻa i nā panela insulation kalepa. Hilinaʻi nā kaʻa halihali refrigerated, nā mīkini kalepa, a me ka insulation spray i nā ʻōnaehana polyurethane paʻa e pale aku i ka hoʻoili wela. Hoʻokomo nā papahana kūkulu i nā panela polyisocyanurate prefabricated e hoʻohaʻahaʻa i ka hoʻohana ʻana i ka ikehu hale. Hāʻawi pū nā huʻa paʻa i hoʻoheheʻe ʻia i nā hoʻonā hoʻopili maʻamau no nā lako uila palupalu.

Nā noi PEG i nā lole, Rubber, a me nā lāʻau lapaʻau

Hana nā polymers polyethylene glycol ma ke ʻano he mau mea kōkua hana non-ionic ma nā ʻano hana like ʻole. Hāʻawi nā papa kaumaha molekala like ʻole i nā ʻano hana like ʻole i nā hana hana.

• Ka Hana ʻana i nā lole:Hana nā papa wai e like me PEG-200 ma ke ʻano he mea palupalu a me nā mea antistatic. Hana nā papa waena e like me PEG-400, 600, a me 800 ma ke ʻano he mea lubricant a me nā mea hoʻomaʻū i ka wā e hoʻopau ai i ka fiber. Hana nā koho kaumaha molekala kiʻekiʻe e like me PEG-4000 ma ke ʻano he mea hoʻopili plasticizer a me nā mea palupalu.
• Hana ʻana i ka laholio:Hana ʻo PEG-1000 a me 1500 ma ke ʻano he mau mea hoʻolaha e paipai ana i ka vulcanization kūpono a me ka hoʻolaha ʻana o ke kalapona ʻeleʻele. ʻO nā papa paʻa e like me PEG-4000 a me 8000 e lawelawe ma ke ʻano he mau mea hoʻokuʻu ʻōpala, nā lubricants, a me nā coolants.
• Nā Hana Lapaʻau:Hana nā polyols hoʻoheheʻe wai ma ke ʻano he mau mea hoʻohui a me nā mea waena hana i nā huahana lapaʻau. Hoʻonui kēia mau mea maka i hoʻomaʻemaʻe ʻia i ka solubility lāʻau hana, ka pono o ka mea hoʻopaʻa, a me ka hana lawe ʻana i nā noi lāʻau waha a me waho.

Hilinaʻi nā kaʻina hana metala ʻoihana i nā polyethylene glycols no ka hoʻomaʻalili ʻana, ka lubrication, a me ka hoʻoili wela. Hoʻohana nā mea hana pepa i nā hopena polyglycol e kāohi i ka paʻa ʻana o ka makū a hoʻomaikaʻi i ka laumania o ka ʻili. Hāʻawi kēia mau mea hoʻohui hana i ke kūpaʻa kemika ma waena o nā ʻauʻau hana waikawa a me alkaline. Koho nā hana ʻoihana hou i nā kaumaha polymer kikoʻī e hoʻonui i ka wikiwiki o ka hana a me ka maikaʻi o ka huahana.

Nā Kūlana Koho no nā Polyols Kūikawā MOFAN

Ke hoʻohālikelike nei i nā waiwai Hydroxyl a me ka hana i nā pono noi

Pono ke koho polyol kūpono i nā helu hydroxyl e hoʻohālikelike a me ka hana e kuhikuhi i nā metrika kino. Hoʻoholo ka hana i ke ʻano crosslinking o ka pūnaewele i hoʻōla ʻia. Hoʻohālikelike nā waiwai Hydroxyl i nā ʻāpana hydroxyl hana ma kēlā me kēia ʻāpana nuipa. ʻO nā waiwai hydroxyl haʻahaʻa me ka hana ma waena o 2 a me 3 e hana i nā pūnaewele elastic. ʻO nā waiwai hydroxyl kiʻekiʻe me ka hana ma waena o 4 a me 8 e hana i nā ʻano thermoset paʻa. Loiloi nā mea hoʻohālikelike i kēia mau metrika e kaulike i nā waiwai mechanical hope loa. No ka laʻana, ʻo kahi polyether polyol me ka waiwai hydroxyl o 150 mg KOH/g a me ke kaumaha molekala awelika helu o 1200 g/mol e hōʻike ana i kahi hana kokoke i 3.2. Hoʻohana nā mea hoʻohālikelike i kēia papa kikoʻī e hana i nā panela huʻa semi-rigid no nā panela kūloko kaʻa.

Ka Hoʻonui ʻana i ka Viscosity, Reactivity, a me Curing Kinetics

ʻO ka holomua o ke kaʻina hana e pili ana i ke ʻano kahe pololei a me ka wikiwiki o ka hoʻōla ʻana. ʻO ke koho ʻana i nā polyols wai me nā kaupaona molekala kūpono e kāohi i ka viscosity kumu. Hoʻohui nā mea hoʻohui i ka calcium carbonate i hoʻoheheʻe ʻia ma ka 20-40 wt.% ukana e kūkulu i ke kū'ē sag. Eia kekahi, ʻo ka hoʻohui ʻana i ka silica fumed ma ka 2-5 wt.% ukana e hāʻawi i ka ʻano thixotropic ikaika e pale aku i ka sagging ma nā substrates vertical. ʻO ka synthesizing prepolymers me ka isocyanate a i ka hydroxyl ratio ma waena o 1.8:1 a me 2.5:1 e kōkua i ka hoʻopaʻa ʻana i ka viscosity o ka ʻōnaehana. ʻO ke koho polyol akahele e hoʻomaʻalahi i ka lawelawe ʻana i nā lako hana automated.

Hoʻokumu nā mea hoʻouluulu organotin e like me DBTDL ma 0.01-0.1 wt.% i nā helu hopena i wānana ʻia. Hoʻolaha kēia mau mea hoʻohui i ka hoʻokumu ʻana o ka urethane e hoʻopaʻa i kahi ʻili ʻole i loko o 30 a 90 mau minuke. ʻO nā mea hoʻouluulu amine tertiary e like me nā ʻano hoʻōla wikiwiki i nā ʻōnaehana polyurethane. ʻO ka hoʻohālikelike ʻana i nā mea hoʻouluulu hana me nā polyols hana e pale i ka hoʻokumu ʻana o ka hakahaka i nā ʻāpana i hoʻoheheʻe ʻia.

Ka Hoʻonui ʻana i ke Kūlana Wela a me ke Kū'ē ʻana i ke Kaiapuni

ʻO ke koho ʻana o ke kuamoʻo e hoʻomalu i ke kūpaʻa hydrolytic a me ke kūpaʻa kemika lōʻihi. Mālama nā polyols Polyether i ke kūpaʻa hydrolytic maikaʻi loa, e mau ana ma mua o 2000 mau hola ma 95% ka haʻahaʻa pili a me 70°C me ka ʻole o ka pohō waiwai nui. I ka ʻaoʻao ʻē aʻe, hoʻohaʻahaʻa wikiwiki nā polyols polyester ma lalo o ke kiʻekiʻe o ka haʻahaʻa no ka mea e hoʻouka ka makū i nā loulou ester. ʻO ke koho ʻana i nā polyols ʻē aʻe ma kahi o nā polyols polyester e hoʻomaikaʻi i ke kūpaʻa wai i nā elastomers polyurethane. Hāʻawi nā polyols kūikawā i ke kūpaʻa kemika maikaʻi loa i nā wahi ʻoihana koi. Mālama nā polyols polibutadiene kūikawā ma mua o 98.5% ka nuipa i ka wā e hoʻomau nei i ka hōʻike ʻana ma 100°C no 1000 mau hola, e mālama ana i ka loli modulus elastic ma lalo o 100%.

Hāʻawi nā iwi kuamoʻo ʻala i ka paʻakikī wela e kūʻē i nā ukana wela kiʻekiʻe mai nā ʻano isocyanate i pane ʻole ʻia. Pale nā ​​koho Aliphatic i ka hoʻololi ʻino ʻana o ka UV. Hoʻohui nā mea hoʻohui i nā antioxidants ma 0.5-1.5 wt% e hoʻomaikaʻi i ke kūpaʻa oxidative lōʻihi. Pale ka hoʻohui ʻana i nā mea hoʻopaʻa UV ma 0.5-2.0 wt% i nā mea o waho mai ka pōʻino o ka radiation solar. Hōʻoia ka koho polyol kūpono e mālama nā polyols kūikawā i nā waiwai polyurethane koʻikoʻi ma nā noi waho like ʻole.

Nā polyols kūikawā MOFANa me nā moʻo polyethylene glycol kiʻekiʻe e hāʻawi i ka waiwai kumu ma waena o ka ʻenekinia polymer hou. ʻAe nā hoʻolālā molekala pololei i nā polyols e hoʻomaikaʻi i nā kinetics hopena a me ka ikaika o ka pūnaewele kino. Hoʻonui pololei nā waiwai mea i hana ʻia i ka hana huahana i nā mea hoʻopili polyurethane, nā mea hoʻopaʻa kūkulu, nā elastomers ikaika, a me nā huʻa insulation thermal paʻa. Hoʻokumu nā mea hoʻohālikelike i ke kūpaʻa kemika kiʻekiʻe, ke kūpaʻa wela, a me ka lōʻihi mechanical ma o ka kemika hana i kāohi ʻia. Loaʻa i nā hana hana ʻoihana ka ʻoi aku ka maikaʻi o ka hana ʻana me kēia mau hoʻonā kemika maʻemaʻe kiʻekiʻe ma nā laina hana like ʻole. Ua kono ʻia nā mea kūʻai aku ʻoihana e kūkākūkā me nā loea loea MOFAN e hoʻomohala i nā ʻano hana maʻamau, e hoʻoponopono i nā pahuhopu hana koʻikoʻi, a loaʻa ke kākoʻo i hoʻolaʻa ʻia no nā koi hana paʻakikī.

Nā nīnau i nīnau pinepine ʻia