Polyurethane cov kua roj vanish - ib tug niaj hnub finishing khoom

Cov kev loj hlob ntawm niaj hnub technologies rau zus tau tej cov xov ntaub ntawv tso cai los tsim tag nrho cov tshiab thiab cov khoom tshiab nrog ib tug xov tooj ntawm txawv zog. Tej novelties siv polyurethane lacquer.

Qhov no cov ntaub ntawv uas nruab nrab yog ib tug txawv pes tsawg leeg cov ntsiab ntawm hydroxyl polyfunctional isocyanates. Polyurethane lacquer thaum ua ntawv thov ntaub ntawv rau ntawm qhov chaw ntawm khoom polymer nrog peb-dimensional qauv. Qhov no txoj kev tshwm sim vim cov tshuaj tiv thaiv ntawm isocyanates nrog hydroxyl Cheebtsam (tsis tiav polyesters tau los ntawm cov tshuaj tiv thaiv ntawm ib tug dhau heev lawm ntawm polyhydric cawv nrog ib tug dibasic acid los yog nrog mixtures ntawm lub monobasic thiab dibasic fatty acids).

Feem ntau siv thiab cov hydrolyzed polyvinyl acetates, tsis tiav polyacetals, cellulose esters, thiab phenol-formaldehyde cob ksilolformaldegidnye. Ntawm cov isocyanates siv feem ntau siv diisocyanate thiab ntau yam mixtures thereof. Tsis tas li ntawd, siv hexamethylene diisocyanate thiab cov tshuaj tiv thaiv cov khoom ntau heev diisocyanate nrog ib tug polyhydric cawv thiab hydroxyl muaj polyesters. Ua hauj lwm nrog cov ntaub ntawv yuav tsum tau tshwj xeeb ceev faj. Nws yog yog li ntawd ntau tswv yim rau siv "sim" los yog "thaum" isocyanates, tebchaw uas yog yooj yim decomposed thaum rhuab. Qhov no pab pawg neeg no muaj xws li cov tshuaj tiv thaiv cov khoom ntawm isocyanates nrog malonic, acetoacetic ester, ethyleneimine thiab feniluretanom. Polyurethane lacquers yaj siv esters, ketones, chlorinated hydrocarbons, nitroparaffins. Cov cuab yeej diluent yog xylene, toluene, aliphatic hydrocarbon.

Polyurethane lacquers yog muaj raws li ib tug-tivthaiv los yog ob-tivthaiv compositions. Nyob rau hauv lub thib ob cov ntaub ntawv nyias npaj tov ntawm hydroxyl-muaj tebchaw, los yog mixtures ntawm cov tebchaw thiab isocyanate kev daws teeb meem ua ntej yuav siv no neeg sawv cev yog tov. Xws li ib tug npaj ob-tivthaiv lacquer yog khaws cia los ntawm 4 mus rau 48 teev. Tej coatings yog siv rau cov txheej kub thiab txias curing. Unlimited xam tau tias yog ruaj khov ib-feem kub-tua coatings ua rau lub hauv paus ntawm thiaj li hu ua "sim" isocyanates.

Polyurethane cov kua roj vanish ntaub ntawv ib tug glossy, elastic coatings nrog siab hardness, zoo adhesion, siab dielectric zog thiab tshuaj kuj. Lawv yog nce siv rau kev tiv thaiv ntawm qhob, hlau, ntoo chaw thiab yog siv rau cov painting cov khoom ntawm tshuaj, smelting thiab refining nroj tsuag, nyob rau zaub mov qhauj.

Qhov polyurethane cov kua roj vanish rau parquet, rooj tog, roj hmab, daim ntawv, tawv, naval Siv, hluavtaws fabrics thiab yas. Qhov no txheej yog check heev thiab tswv yim, nws zoo heev tsub kom lub txee lub neej ntawm ntaub ntawv sib txawv. Ib-tivthaiv coatings yog feem ntau siv rau kev tiv thaiv ntawm tooj liab, txhuas thiab hlau cov khoom.

Varnish polyurethane dej tiv thaiv cov ntoo phab ntsa thiab ceilings pwm thiab pwm. Nws yog ib heev lub teeb thiab kub-resistant. Qhov no tshab txheej pub txig highlight lub ntuj kev zoo nkauj ntawm cov ntoo.