Epoxy cob

1,Taw qhia

Epoxy resin feem ntau yog siv ua ke nrog cov khoom ntxiv. Additives tuaj yeem xaiv raws li kev siv sib txawv. Cov additives xws li Curing Agent, Modifier, Filler, Diluent, thiab lwm yam.

Curing tus neeg sawv cev yog ib qho tseem ceeb additive. Txawm hais tias cov epoxy resin siv los ua cov nplaum, txheej, castable, curing agent yuav tsum tau ntxiv, txwv tsis pub nws tuaj yeem kho tsis tau. Vim muaj qhov sib txawv ntawm daim ntawv thov thiab kev ua tau zoo, muaj cov kev xav tau sib txawv rau epoxy resin, curing agent, modifier, filler, diluent thiab lwm yam additives.

2,Kev xaiv ntawm Epoxy Resin

(1) Xaiv raws li Daim Ntawv Thov

① Thaum siv los ua cov nplaum, nws yog qhov zoo dua los xaiv cov resin nrog nruab nrab epoxy nqi (0.25-0.45);

② Thaum siv los ua castable, nws yog qhov zoo dua los xaiv cov resin nrog tus nqi epoxy siab (0.40);

③ Thaum siv los ua txheej, cov resin uas tsis tshua muaj nqi epoxy (< 0.25) feem ntau xaiv.

(2) Xaiv raws li Mechanical Strength

Lub zog muaj feem xyuam nrog rau qib ntawm crosslinking. Tus nqi epoxy yog siab, thiab qhov kev sib tw crosslinking kuj siab tom qab kho. Tus nqi epoxy yog qis thiab qhov crosslinking degree qis tom qab kho. Cov nqi sib txawv ntawm epoxy kuj yuav ua rau muaj zog sib txawv.

① Cov resin nrog tus nqi siab epoxy muaj zog dua tab sis nkig;

② Cov resin nrog nruab nrab tus nqi epoxy muaj lub zog zoo ntawm qhov kub thiab txias;

③ Cov resin uas tsis tshua muaj nqi epoxy muaj lub zog tsis zoo ntawm qhov kub thiab txias.

(3) Xaiv raws li Kev Ua Haujlwm Kev Ua Haujlwm

① Rau cov neeg uas tsis xav tau kev kub ntxhov thiab lub zog, lawv tuaj yeem xaiv cov resin nrog cov nqi qis dua epoxy uas tuaj yeem qhuav sai thiab tsis yooj yim kom ploj.

② Rau cov neeg uas xav tau zoo permeability thiab lub zog, lawv tuaj yeem xaiv cov resin nrog cov nqi epoxy ntau dua.

3,Kev xaiv tus neeg ua haujlwm kho

(1) Hom Curing Agent:

Cov tshuaj tua kab ntau rau epoxy resin muaj xws li aliphatic amine, alicyclic amine, aromatic amine, polyamide, anhydride, resin thiab tertiary amine. Tsis tas li ntawd, nyob rau hauv qhov cuam tshuam ntawm photoinitiator, UV lossis lub teeb tuaj yeem ua rau epoxy resin kho. Amine curing tus neeg sawv cev feem ntau yog siv rau hauv chav tsev kub lossis kub kub kho, thaum anhydride thiab aromatic curing agent feem ntau yog siv rau kev kho cua sov.

(2) Kev siv tshuaj tua kab mob

① Thaum amine siv los ua tus neeg sawv cev crosslinking, nws raug xam raws li hauv qab no:

Amine dosage = MG / HN

M = molecular hnyav ntawm amine;

HN = tus naj npawb ntawm cov nquag hydrogen;

G = epoxy tus nqi (epoxy sib npaug rau 100 g ntawm epoxy resin)

Qhov kev hloov pauv tsis ntau tshaj 10-20%. Yog tias kho nrog amine ntau dhau, cov resin yuav nkig. Yog tias qhov ntau npaum li cas me me, qhov kho tsis zoo tag nrho.

② Thaum anhydride siv los ua tus neeg sawv cev crosslinking, nws raug xam raws li hauv qab no:

Anhydride ntau npaum li cas = MG (0.6 ~ 1) / 100

M = molecular hnyav ntawm anhydride;

G = epoxy tus nqi (0.6 ~ 1) yog qhov kev sim coefficient.

(3) Lub hauv paus ntsiab lus ntawm kev xaiv tus neeg sawv cev kho

① Kev Ua Haujlwm Zoo.

Qee qhov xav tau qhov kub thiab txias, qee qhov xav tau hloov pauv, thiab lwm tus xav tau kev tiv thaiv corrosion zoo. Tus neeg sawv cev kho kom tsim nyog raug xaiv raws li qhov xav tau sib txawv.

② Txoj Cai Kho.

Qee cov khoom tsis tuaj yeem ua kom sov, tom qab ntawd tus neeg saib xyuas kev kho cua sov tsis tuaj yeem xaiv.

③ Lub sijhawm thov.

Lub sijhawm hu ua daim ntawv thov yog hais txog lub sijhawm txij li lub sijhawm uas cov epoxy resin ntxiv nrog tus neeg sawv cev kho rau lub sijhawm uas nws siv tsis tau. Rau daim ntawv thov ntev, anhydrides lossis latent curing agents feem ntau yog siv.

④ Kev nyab xeeb.

Feem ntau, cov tshuaj tua kab mob uas tsis muaj tshuaj lom yog qhov zoo dua thiab muaj kev nyab xeeb rau kev tsim khoom.

⑤ Nqi.

4,Kev Xaiv Cov Hloov Kho

Cov nyhuv ntawm kev hloov kho yog los txhim kho cov tanning, shearing kuj, dabtsi yog khoov tsis kam, cuam tshuam tsis kam thiab rwb thaiv tsev kev ua tau zoo ntawm epoxy resin.

(1) Kev hloov kho thiab cov yam ntxwv

① Polysulfide roj hmab: txhim kho qhov cuam tshuam lub zog thiab tev tawm tsis kam;

② Polyamide cob: txhim kho brittleness thiab adhesion;

③ Polyvinyl cawv TERT butyraldehyde: txhim kho qhov cuam tshuam tanning tsis kam;

④ NBR: txhim kho kev cuam tshuam tanning kuj;

⑤ Phenolic resin: txhim kho qhov kub thiab txias tsis kam;

⑥ Polyester resin: txhim kho qhov cuam tshuam tanning kuj;

⑦ Urea formaldehyde melamine resin: nce tshuaj tiv thaiv thiab lub zog;

⑧ Furfural resin: txhim kho cov kev ua haujlwm zoo li qub, txhim kho cov kua qaub;

⑨ Vinyl resin: txhim kho tev thiab cuam tshuam lub zog;

⑩ Isocyanate: txo cov dej noo permeability thiab ua kom dej tsis kam;

11 Silicone: txhim kho cov cua sov.

(2) Dosage

① Polysulfide roj hmab: 50-300% (nrog kho tus neeg sawv cev);

② Polyamide cob thiab phenolic resin: 50-100%;

③ Polyester resin: 20-30% (tsis muaj tus neeg saib xyuas, lossis tus neeg saib xyuas me me kom nrawm cov tshuaj tiv thaiv.

Feem ntau hais lus, kev hloov kho ntau dua yog siv, qhov yooj yim dua yog, tab sis cov thermal deformation kub ntawm cov khoom resin txo qis raws li. Txhawm rau txhim kho qhov hloov pauv ntawm cov resin, cov tshuaj toughening xws li dibutyl phthalate lossis dioctyl phthalate feem ntau siv.

5,Xaiv cov Fillers

Lub luag haujlwm ntawm fillers yog los txhim kho qee yam khoom ntawm cov khoom thiab cov cua sov dissipation tej yam kev mob ntawm resin curing. Nws tseem tuaj yeem txo cov epoxy resin thiab txo tus nqi. Cov fillers sib txawv tuaj yeem siv rau ntau lub hom phiaj. Nws yuav tsum tsawg dua 100 mesh, thiab qhov ntau npaum li cas nyob ntawm nws daim ntawv thov. Feem ntau cov fillers yog raws li nram no:

(1) Asbestos fiber ntau thiab iav fiber ntau: nce toughness thiab cuam tshuam tsis kam;

(2) Quartz hmoov, porcelain hmoov, hlau hmoov, cement, emery: nce hardness;

(3) Alumina thiab porcelain hmoov: ua kom cov nplaum nplaum thiab lub zog txhua yam;

(4) Asbestos hmoov, silica gel hmoov thiab kub siab cement: txhim kho cov cua sov;

(5) Asbestos hmoov, quartz hmoov thiab pob zeb hmoov: txo tus nqi shrinkage;

(6) Aluminium hmoov, tooj liab hmoov, hlau hmoov thiab lwm yam hlau hmoov: nce thermal conductivity thiab conductivity;

(7) Graphite hmoov, talc hmoov thiab quartz hmoov: txhim kho kev hnav khaub ncaws thiab lubrication kev ua haujlwm;

(8) Emery thiab lwm yam abrasives: txhim kho kev hnav khaub ncaws hnav;

(9) Mica hmoov, porcelain hmoov thiab quartz hmoov: nce kev ua haujlwm rwb thaiv tsev;

(10) Txhua yam xim thiab graphite: nrog xim;

Tsis tas li ntawd, raws li cov ntaub ntawv, tus nqi tsim nyog (27-35%) ntawm P, As, Sb, Bi, Ge, Sn thiab Pb oxides ntxiv rau hauv cov resin tuaj yeem tswj cov adhesion nyob rau hauv qhov kub thiab txias.

6,Kev xaiv Diluent

Lub luag haujlwm ntawm diluent yog txo cov viscosity thiab txhim kho cov permeability ntawm resin. Nws tuaj yeem muab faib ua inert thiab nquag ua ob pawg, thiab tus nqi feem ntau tsis tshaj 30%. Cov diluents muaj xws li diglycidyl ether, polyglycidyl ether, propylene oxide butyl ether, propylene oxide phenyl ether, dicyclopropane ethyl ether, triethoxypropane propyl ether, inert diluent, xylene, toluene, acetone, thiab lwm yam.

7,Cov ntaub ntawv xav tau

Ua ntej yuav ntxiv curing agent, tag nrho cov ntaub ntawv siv, xws li resin, curing agent, muab tub lim, modifier, diluent, thiab lwm yam, yuav tsum tau kuaj xyuas, uas yuav tsum tau ua raws li cov hauv qab no:

(1) Tsis muaj dej: cov khoom uas muaj dej yuav tsum tau qhuav ua ntej, thiab cov kuab tshuaj uas muaj cov dej me me yuav tsum tau siv tsawg li tsawg tau.

(2) Purity: cov ntsiab lus ntawm impurities uas tsis yog dej yuav tsum tsawg dua 1%. Txawm hais tias nws tseem tuaj yeem siv nrog 5% -25% impurities, lwm cov ntaub ntawv feem pua ​​​​ntawm cov mis yuav tsum tau nce ntxiv. Nws yog qhov zoo dua los siv qib reagent hauv me me.

(3) Lub Sijhawm Siv Tau: Nws yog ib qho tsim nyog yuav tsum paub seb cov khoom siv tsis raug.