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ʻO ka hiʻohiʻona o ka noho lua UF

2021-11-19

Urea formaldehyde(UF) noho halepakuHoʻohana nui ʻia e hoʻomākaukau i ka pena baking amino alkyd me ka resin alkyd e hoʻomaikaʻi i ka paʻakikī a me ka maloʻo o ke kiʻi pena. Hiki ke hoʻohui ʻia ka noho kaʻa UF me ka resin alkyd maloʻo ʻole e hana i ka peʻa amino curing acid, hiki ke hoʻohana ʻia no ka uhi māmā ʻana i nā lako lāʻau. Akā ʻaʻole maikaʻi ka pale ʻana i ka wā, ka wai a me ka mālama māmā. Hiki ke hoʻohana ʻia ka epoxy resin a me ka resin alkyd e hoʻomākaukau i nā primers a me nā pena o loko me nā waiwai like ʻole. Aia nā hiʻohiʻona nui:

1. Ke kumukuai oka noho luau UFhe makaʻu a lawa nā mea maka.

2. ʻO ke ʻano molekiko ourea formaldehyde(UF) noho lualoaʻa nā ʻātoma oxygen polar, no laila ua pili maikaʻi i ka ʻili. Hiki ke hoʻohana ʻia no ka primer a me ka uhi waena e hoʻomaikaʻi i ka pili ʻana ma waena o nā topcoats.

3. No ka meaNoho hale lua UFhiki ke ho'ōla i ka lumi wela ke hoʻohana i ka acid catalyst, hiki ke hoʻohana ʻia no nā ʻāpana lāʻau ʻelua.

4. ʻO ke kiʻi pena i hoʻōla ʻia me ka resin urea formaldehyde he hiki ke maʻalahi.

5. He kiʻekiʻe ka viscosity o ka resin formaldehyde Urea, ka waiwai waika kiʻekiʻe a me ka paʻa ʻole o ka mālama ʻana.

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