Ka nānā 'ana o ka epoxy resin formula

2022-12-14


  ʻO kaʻahu resin hoʻohana maʻamau me nā mea hoʻohui e loaʻa ai ka waiwai noi. Hiki ke koho ʻia nā mea hoʻohui e like me nā hoʻohana like ʻole. ʻO nā mea hoʻohui maʻamau e pili ana i ka curing agent, modifier, filler, thinner a me nā mea ʻē aʻe.


  ʻO ka lāʻau lapaʻau he mea hoʻohui pono ʻole. E hoʻohui ʻia ka lāʻau lapaʻau no ka hoʻopili, ka uhi ʻana a me ka castable, inā ʻaʻole hiki ke hoʻōla ʻia ka resin epoxy. Ma muli o nā noi like ʻole a me nā koi hana, aia kekahi mau koi like ʻole no ka epoxy resin, curing agent, modifier, filler, thinner a me nā mea hoʻohui ʻē aʻe.


1. Ke koho ʻana i ka resin epoxy


a) E koho mai ke kumu


  ʻOi aku ka maikaʻi o ke koho ʻana i ka resin me ka waiwai epoxy medium (0.25-0.45) i mea hoʻopili, e like me epoxy resin e44 a me 634; ʻOi aku ka maikaʻi e koho i ka resin me ka waiwai epoxy kiʻekiʻe (0.40) e like me ka castable, e like me epoxy resin e51 a me 6101; ʻO ka maʻamau, hoʻohana ʻia ka resin me ka waiwai epoxy haʻahaʻa (<0.25) e like me ka uhi ʻana, e like me 901, 904, 907, 909, etc.


EPOXY RESIN E51


b) E koho mai ka ikaika mechanical


  ʻO ka resin me ka waiwai epoxy kiʻekiʻe he ikaika kiʻekiʻe akā he palupalu; He maikaʻi ka ikaika o ka epoxy resin i ke kiʻekiʻe a me ka haʻahaʻa haʻahaʻa; Inā haʻahaʻa ka waiwai epoxy, ʻilihune ka ikaika i ka wela kiʻekiʻe. No ka mea e pili ana ka ikaika i ka degere o ka crosslinking, kiʻekiʻe ke kiʻekiʻe o ka crosslinking i ka wā e kiʻekiʻe ai ka waiwai epoxy, a me ka degere o ka crosslinking haʻahaʻa i ka wā e haʻahaʻa ai ka waiwai epoxy, ka mea e hoʻololi ai i ka ikaika.


c) E koho mai ka pono hana


  ʻAʻole pono ke kūpaʻa i ka wela kiʻekiʻe a ʻaʻole pono ka ikaika. Manaʻo ʻia e maloʻo koke ka resin epoxy a ʻaʻole maʻalahi e nalowale. Hiki ke koho ʻia ka resin me ka waiwai epoxy haʻahaʻa; Inā makemake ʻoe i ka permeability maikaʻi a me ka ikaika, hiki iā ʻoe ke koho i ka resin me ka waiwai epoxy kiʻekiʻe.


2. Ke koho ʻana i ka lāʻau lapaʻau


a) ʻAno lāʻau lapaʻau


  ʻO nā mea lapaʻau maʻamau no ka epoxy resin he amine aliphatic, amine alicyclic, amine aromatic, polyamide, acid anhydride, resin a me tertiary amine. Eia kekahi, hiki i ka UV a i ʻole ke kukui ke hoʻōla i ka resin epoxy ma lalo o ka hana a ka photoinitiator. Hoʻohana maʻamau ʻia ka mea hoʻoponopono amine no ka hoʻōla ʻana ma ka lumi wela a i ʻole ka wela haʻahaʻa, aʻo ka anhydride a me ka mea hoʻōla ʻala ʻono e hoʻohana mau ʻia no ka hoʻōla ʻana.


b) Ka nui o ka lāʻau lapaʻau


  i. Ke hoʻohana ʻia ka amine ma ke ʻano he mea hoʻopili cross-linking, hoʻohana ʻia kēia ʻano kumu no ka helu ʻana


ʻAmina ʻai=mg/hn


Where:

M=kaumaha molekula o ka amine

Hn=ka helu o ka hydrogen hana

G= waiwai epoxy (epoxy like no 100 grams o ka epoxy resin)


  ʻAʻole ʻoi aku ka nui o ka hoʻololi ma mua o 10-20%. Inā hoʻohana ʻia ka amine nui no ka hoʻōla ʻana, e lilo ka resin i palupalu. Inā liʻiliʻi loa ka dosage, ʻaʻole kūpono ka hoʻōla ʻana.


ii. Ke hoʻohana ʻia ka acid anhydride, helu ʻia e like me ke ʻano ma lalo


Ka nui o ka waika anhydride=mg (0.6-1)/100


Where:

M=ke kaumaha molekula o ka anhydride

ʻO G=epoxy waiwai (0.6~1) ka hoʻāʻo


c) Nā loina no ke koho ʻana i ka lāʻau lapaʻau


  i. E koho mai i nā koi hana: koi kekahi i ke kūpaʻa wela kiʻekiʻe, koi kekahi i ka maʻalahi maikaʻi, a koi kekahi i ke kūpaʻa corrosion maikaʻi. E koho i ka lāʻau lapaʻau kūpono e like me nā koi like ʻole.


  ii. Ke koho ʻana mai ke ʻano hoʻōla: Inā ʻaʻole hiki ke hoʻomehana ʻia kekahi mau huahana, ʻaʻole hiki ke koho ʻia ka lāʻau lapaʻau no ka hoʻōla wela.


  iii. E koho mai ka manawa kūpono: ʻo ka mea i kapa ʻia ʻo ka manawa kūpono e pili ana i ka manawa mai ka manawa i hoʻohui ʻia ai ka epoxy resin me ka lāʻau lapaʻau a hiki i ka manawa hiki ʻole ke hoʻohana. No ka noi ʻana no ka manawa lōʻihi, e koho maʻamau i ka acid anhydride a i ʻole latent curing agent.


  iv. E koho mai ka hiʻohiʻona o ka palekana: maʻamau, ʻoi aku ka maikaʻi o ka loaʻa ʻana o ka ʻona haʻahaʻa, kahi kūpono no ka hana palekana.


  v. E koho mai ke kumukuai.


3. Ke koho ʻana i ka mea hoʻololi


  ʻO ke kumu o ka hoʻololi ʻana ʻo ia ka hoʻomaikaʻi ʻana i ka waiwai tanning, shear resistance, bending resistance, impact resistance and insulation performance of the epoxy resin. Hoʻokomo pōkole ʻia nā mea hoʻololi maʻamau a me ko lākou mau ʻano.


a) Polysulfide rubber: hiki ke hoʻomaikaʻi i ka ikaika o ka hopena a me ka pale ʻili;


b) Polyamide resin: Hiki iā ia ke hoʻomaikaʻi i ka brittleness a me ka adhesion;


c) PVA tert butyraldehyde: hoʻomaikaʻi i ka hopena tanning kū'ē;


d) Nitrile rubber: hoʻomaikaʻi i ka hopena tanning kū'ē;


e) Phenolic resin: hiki iā ia ke hoʻomaikaʻi i ka pale wela a me ka pale ʻana i ka corrosion;


f) Polyester resin: hoʻomaikaʻi i ka hopena tanning kū'ē;


g) Urea formaldehyde melamine resin: hoʻonui i ke kū'ē a me ka ikaika;


h) Furfural resin: hoʻomaikaʻi i ka hana kuʻekuʻe wāwae a me ka pale ʻana i ka waikawa;


i) Vinyl resin: hoʻomaikaʻi i ka pale ʻana i ka peeling a me ka ikaika hopena;


j) Isocyanate: e ho'ēmi i ka mois permeability a hoʻonui i ka pale wai;


k) Silicone resin: hoʻomaikaʻi i ka pale wela


  Hiki ke 50-300% ka nui o ka lāʻau polysulfide, a e hoʻohui ʻia ka mea hoʻōla; ʻO ka nui o ka resin polyamide a me ka resin phenolic he 50-100%, a ʻo ka nui o ka resin polyester he 20-30%. ʻAʻole hiki ke hoʻohui ʻia kahi lāʻau lapaʻau ʻē aʻe, a i ʻole hiki ke hoʻohui ʻia kahi mea hoʻolaʻa liʻiliʻi e hoʻolalelale i ka hopena.


  ʻO ka mea maʻamau, ʻoi aku ka nui o ka hoʻololi ʻana, ʻoi aku ka nui o ka maʻalahi, akā e emi iho ka mahana deformation wela o nā huahana resin. I mea e hoʻomaikaʻi ai i ka maʻalahi o ka resin, hoʻohana pinepine ʻia nā mea hana paʻakikī e like me dibutyl phthalate a i ʻole dioctyl phthalate.


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