Phenol-formaldehyde utomoni. Kukonzekera ndi ntchito. katundu

Phenol formaldehyde utomoni - ndi kupanga utomoni ndi katundu wa thermosets kapena thermosets. resins oterowo ndi oligomeric kapena madzi zinthu, akamagwira polycondensation wa formaldehyde ndi phenol mu acidic kapena zamchere sing'anga (resol, novolac utomoni kapena bakelite). Imeneyi zimakhudza katundu chomaliza mankhwala.

The katundu wa resins phenol-formaldehyde

Phenol formaldehyde utomoni (chilinganizo [-C6H3 (o) -CH2-] n) ali mkulu magetsi kutchinjiriza, dzimbiri wabwino ndi kukhazikika makina. Mwangwiro sungunuka chimasanduka onunkhira aliphatic, ketones ndi solvents chlorinated. Ndi sungunuka njira kumalo ozizira ndi amadzimadzi soda njira. Pambuyo kuchiritsa phenol-formaldehyde resins mtima mu gustosshitye ma polima microheterogeneous dongosolo amorphous.

Kodi phenol formaldehyde utomoni umagwiritsidwa?

- kupanga mapulasitiki: anaumitsa utomoni otchedwa resite, Unalimbitsa mafuta pamaso pa zidulo sulphonic - karbolit, mu kukhalapo kwa asidi lactic - neoleykoritami;

- kupanga vanishi, zomatira, kupanga, mayendedwe, ziyangoyango nanyema, mipira kwa ma biliyadi;

- kuchokera karbolit (anachiritsa phenol-formaldehyde utomoni) chopangidwa multimers nyumba ena zitsanzo Soviet;

- komanso mankhwala ntchito monga binder kwa kupanga akamaumba nyimbo chodzaza ndi fillers osiyana (ufa nkhuni, galasi CHIKWANGWANI, mapadi), chipboard ndi fibreboard, kuthira ndi impregnating nyimbo (kwa CHIKWANGWANI wodzazidwa ndi zipangizo nsalu kwa plywood) zomatira.

Phenol formaldehyde utomoni: kulandira ndi zachilengedwe

Ndipo formaldehyde ndi phenol ntchito kupanga resins phenol-formaldehyde, ndi poizoni ndi flammable mankhwala. Formaldehyde utomoni ali kungasokoneze thupi: zimayambitsa chikanga ndi dermatitis. Komanso, formaldehyde alinso katundu carcinogenic.  

Bakelite - anaumitsa mankhwala a utomoni phenol-formaldehyde pamaso pa chothandizira ndi. Nkhani imeneyi ndi yofunika kwambiri muzochitika zosiyanasiyana m'moyo wa munthu. Bakelite ndi wochititsa osauka kutentha, koma akusonyeza kukana zabwino kuwononga makina: mantha, mantha, mikangano kapena chipsyinjo. Easy ntchito pa lathe wapadera. Ndi insulator wabwino. The sitimadzipereka soda, acid ndi madzi zilibe ntchito, kupatulapo sulfuric kuikapo maganizo kapena zidulo nitric. Kugonjetsedwa ndi madigiri +300, limapezekanso pa apamwamba kutentha kuyaka.

Izo poyambirira linakonzedwa kuti m'malo shellac - utomoni wapadera opangidwa mu chikhalidwe otentha lacquer tizilombo lonse.

Phenolics. ntchito

Phenoplast - pulasitiki amene analandira ndi solidification formaldehyde resins pa kutentha kukwezeka osakaniza filler iliyonse. Panopa nkhaniyi Maka katundu wake. Kugwiritsa phenoplasts anapangidwa:

- mankhwala anafuna matabwa kusindikizidwa dera - getinaks;

- mankhwala kwa kupanga structural zakuthupi - PCB;

- zinthu wotchipa kwa bawo - njuga, dominoes, Chess;

- ena zinthu Chalk khitchini: amangomvera kwa masitovu gasi, maketulo ndi mipeni, mapoto ndi ziwaya;

- Bakelite phenolic zomatira;

- magetsi mankhwala - mwake, mapulagi, meters magetsi, masiwichi, yolandirana, housings magetsi galimoto, mabokosi yakumapeto, maginito actuators, etc.

- zigawo zikuluzikulu kwa zomangamanga, mwachitsanzo, njira kwa escalators, malo osiyanasiyana ndi Knobs;

- zovala miyala yamtengo wapatali, alendo, malo, zina za maola.