Epoxy Resin

1,Mawu Oyamba

Epoxy resin nthawi zambiri amagwiritsidwa ntchito limodzi ndi zowonjezera. Zowonjezera zimatha kusankhidwa malinga ndi ntchito zosiyanasiyana. Zowonjezera zowonjezera zimaphatikizapo Kuchiritsa, Modifier, Filler, Diluent, etc.

Wochiritsa ndi chowonjezera chofunikira. Kaya utomoni wa epoxy umagwiritsidwa ntchito ngati zomatira, zokutira, zotayidwa, zochiritsa ziyenera kuwonjezeredwa, apo ayi sizingachiritsidwe. Chifukwa cha zofunikira zosiyanasiyana pakugwiritsa ntchito ndi magwiridwe antchito, pali zofunikira zosiyanasiyana za epoxy resin, machiritso, chosinthira, chodzaza, chotsitsa ndi zina.

2,Kusankhidwa kwa Epoxy Resin

(1) Sankhani molingana ndi Aplication

① Mukagwiritsidwa ntchito ngati zomatira, ndi bwino kusankha utomoni wokhala ndi epoxy wapakati (0.25-0.45);

② Akagwiritsidwa ntchito ngati oponyedwa, ndi bwino kusankha utomoni wamtengo wapatali wa epoxy (0.40);

③ Akagwiritsidwa ntchito ngati zokutira, utomoni wokhala ndi epoxy otsika (<0.25) umasankhidwa nthawi zambiri.

(2) Sankhani molingana ndi Mphamvu Yamakina

Mphamvu zimayenderana ndi kuchuluka kwa crosslinking. Mtengo wa epoxy ndi wokwera, ndipo digiri yolumikizira imakhalanso yokwera pambuyo pochiritsa. Mtengo wa epoxy ndi wotsika ndipo digiri yolumikizana ndi yotsika pambuyo pochiritsa. Mtengo wosiyana wa epoxy udzapangitsanso mphamvu zosiyanasiyana.

① Utomoni wokhala ndi mtengo wapamwamba wa epoxy uli ndi mphamvu zambiri koma ndi wosalimba;

② Utomoni wokhala ndi mtengo wapakati wa epoxy umakhala ndi mphamvu yabwino pakutentha kwambiri komanso kotsika;

③ Utomoni wokhala ndi mtengo wotsika wa epoxy umakhala ndi mphamvu zochepa pakutentha kwambiri.

(3) Sankhani malinga ndi Zofunikira Zogwirira Ntchito

① Kwa iwo omwe safuna kukana kutentha kwambiri ndi mphamvu, amatha kusankha utomoni wokhala ndi mtengo wotsika wa epoxy womwe umatha kuuma mwachangu komanso wosavuta kutayika.

② Kwa iwo omwe amafunikira kupenya bwino ndi mphamvu, amatha kusankha utomoni wokhala ndi mtengo wapamwamba wa epoxy.

3,Kusankhidwa kwa Wochiritsa

(1) Mtundu wa Chithandizo:

Zomwe zimagwiritsidwa ntchito pochiritsa epoxy resin ndi monga aliphatic amine, alicyclic amine, amine onunkhira, polyamide, anhydride, resin ndi tertiary amine. Kuphatikiza apo, mothandizidwa ndi photoinitiator, UV kapena kuwala kungathenso kuchiritsa epoxy resin. Kuchiritsa kwa Amine nthawi zambiri kumagwiritsidwa ntchito kutentha kwachipinda kapena kuchiritsa kutentha pang'ono, pomwe anhydride ndi mankhwala onunkhira amagwiritsidwa ntchito kwambiri pochiritsa kutentha.

(2) Mlingo wa Wochiritsa

① Amine akagwiritsidwa ntchito ngati crosslinking agent, amawerengedwa motere:

Mlingo wa Amine = MG / HN

M = kulemera kwa molekyulu ya amine;

HN = chiwerengero cha haidrojeni yogwira;

G = mtengo wa epoxy (epoxy wofanana pa 100 g wa epoxy resin)

Kusintha kosiyanasiyana sikuposa 10-20%. Ngati atachiritsidwa ndi amine wochuluka, utomoniwo udzakhala wosasunthika. Ngati mlingo ndi wochepa kwambiri, kuchiritsa sikwabwino.

② Pamene anhydride imagwiritsidwa ntchito ngati crosslinking agent, imawerengedwa motere:

Mlingo wa anhydride = MG (0.6 ~ 1) / 100

M = molecular kulemera kwa anhydride;

G = mtengo wa epoxy (0.6 ~ 1) ndi gawo loyesera.

(3) Mfundo Yosankha Wochiritsa

① Zofunika Kuchita.

Zina zimafuna kukana kutentha kwapamwamba, zina zimafuna kusinthasintha, ndipo zina zimafuna kukana bwino kwa dzimbiri. Woyenerera wochiritsa amasankhidwa malinga ndi zofunikira zosiyanasiyana.

② Njira Yochiritsira.

Mankhwala ena sangathe kutenthedwa, ndiye wochiritsa wochiritsa kutentha sangathe kusankhidwa.

③ Nthawi yogwiritsira ntchito.

Zomwe zimatchedwa nthawi yogwiritsira ntchito zimatanthawuza nthawi kuyambira nthawi yomwe epoxy resin imawonjezeredwa ndi mankhwala ochiritsira mpaka nthawi yomwe singagwiritsidwe ntchito. Kwa nthawi yayitali, ma anhydrides kapena ma latent machiritso amagwiritsidwa ntchito.

④ Chitetezo.

Nthawi zambiri, mankhwala omwe ali ndi poizoni pang'ono amakhala abwino komanso otetezeka kuti apange.

⑤ Mtengo.

4,Kusankhidwa kwa Modifier

Zotsatira za modifier ndikuwongolera kutenthedwa, kumeta ubweya, kukana kupindika, kukana kukhudzidwa ndi kutsekemera kwa epoxy resin.

(1) Zosintha Wamba ndi Makhalidwe

① rabara ya polysulfide: sinthani mphamvu yamphamvu ndi kukana kupukuta;

② Polyamide utomoni: kusintha brittleness ndi adhesion;

③ Polyvinyl mowa TERT butyraldehyde: sinthani kukana kowotcha;

④ NBR: sinthani kukana kutenthedwa;

⑤ Phenolic utomoni: kusintha kutentha kukana ndi dzimbiri kukana;

⑥ Polyester utomoni: kusintha mmene kutenthedwa pofufuta kukana;

⑦ Urea formaldehyde melamine resin: kuonjezera kukana kwa mankhwala ndi mphamvu;

⑧ Furfural resin: Sinthani magwiridwe antchito opindika, sinthani kukana kwa asidi;

⑨ Vinyl resin: sinthani kukana kwa peel ndi mphamvu yamphamvu;

⑩ Isocyanate: kuchepetsa permeability chinyezi ndi kuonjezera kukana madzi;

11 Silicone: sinthani kukana kutentha.

(2) Mlingo

① rabara ya polysulfide: 50-300% (yokhala ndi machiritso);

② Polyamide utomoni ndi phenolic utomoni: 50-100%;

③ Polyester utomoni: 20-30% (popanda wochiritsa, kapena kachulukidwe kakang'ono ka machiritso kuti apititse patsogolo zomwe zikuchitika.

Nthawi zambiri, zosintha zikagwiritsidwa ntchito kwambiri, kusinthasintha kumakulirakulira, koma kutentha kwamafuta azinthu za utomoni kumachepa motero. Pofuna kupititsa patsogolo kusinthasintha kwa utomoni, zinthu zolimbitsa thupi monga dibutyl phthalate kapena dioctyl phthalate zimagwiritsidwa ntchito.

5,Kusankhidwa kwa Fillers

Ntchito ya ma fillers ndikuwongolera zinthu zina zazinthu komanso kutentha kwa machiritso a utomoni. Ikhozanso kuchepetsa kuchuluka kwa epoxy resin ndikuchepetsa mtengo. Ma fillers osiyanasiyana angagwiritsidwe ntchito pazifukwa zosiyanasiyana. Iyenera kukhala yosakwana ma mesh 100, ndipo mlingo umatengera kugwiritsa ntchito kwake. Ma fillers wamba ndi awa:

(1) Asibesitosi CHIKWANGWANI ndi galasi CHIKWANGWANI: kuonjezera kulimba ndi mphamvu kukana;

(2) ufa wa quartz, ufa wa porcelain, ufa wachitsulo, simenti, emery: onjezerani kuuma;

(3) Alumina ndi ufa wa porcelain: kuonjezera mphamvu zomatira ndi mphamvu zamakina;

(4) ufa wa asibesitosi, ufa wa silika gel ndi simenti yotentha kwambiri: kuwongolera kutentha;

(5) ufa wa asibesitosi, ufa wa quartz ndi ufa wamwala: kuchepetsa kuchuluka kwa shrinkage;

(6) Aluminiyamu ufa, mkuwa ufa, chitsulo ufa ndi zina zitsulo ufa: kuonjezera matenthedwe madutsidwe ndi madutsidwe;

(7) ufa wa graphite, ufa wa talc ndi ufa wa quartz: kupititsa patsogolo ntchito zotsutsana ndi kuvala ndi ntchito ya mafuta;

(8) Emery ndi ma abrasives ena: kuwongolera magwiridwe antchito odana ndi kuvala;

(9) Mica ufa, ufa wa porcelain ndi ufa wa quartz: onjezerani ntchito zotsekemera;

(10) Mitundu yonse ya inki ndi graphite: ndi mtundu;

Kuonjezera apo, malinga ndi deta, ndalama zoyenerera (27-35%) za P, As, Sb, Bi, Ge, Sn ndi Pb oxides zomwe zinawonjezeredwa mu utomoni zimatha kusunga zomatira pansi pa kutentha kwakukulu ndi kupanikizika.

6,Kusankhidwa kwa Diluent

Ntchito ya diluent ndi kuchepetsa mamasukidwe akayendedwe ndi kusintha permeability utomoni. Itha kugawidwa m'magulu awiri a inert komanso yogwira ntchito, ndipo kuchuluka kwake sikuposa 30%. Zosakaniza zodziwika bwino ndi monga diglycidyl ether, polyglycidyl ether, propylene oxide butyl ether, propylene oxide phenyl ether, dicyclopropane ethyl ether, triethoxypropane propyl ether, inert diluent, xylene, toluene, acetone, etc.

7,Zofunika Zakuthupi

Musanawonjezere machiritso, zida zonse zomwe zimagwiritsidwa ntchito, monga utomoni, machiritso, filler, modifier, diluent, ndi zina zotero, ziyenera kuyang'aniridwa, zomwe zidzakwaniritse izi:

(1) Palibe madzi: zinthu zomwe zili ndi madzi ziyenera kuuma kaye, ndipo zosungunulira zokhala ndi madzi ochepa ziyenera kugwiritsidwa ntchito pang'ono momwe zingathere.

(2) Chiyero: zonyansa zina osati madzi zizikhala zosakwana 1%. Ngakhale itha kugwiritsidwanso ntchito ndi zonyansa za 5% -25%, zida zina pamipangidwe ziyenera kuonjezedwa. Ndi bwino kugwiritsa ntchito reagent kalasi pang'ono.

(3) Nthawi Yovomerezeka: Ndikofunikira kudziwa ngati zidazo ndizosavomerezeka.