Polyurethane ghọọ - a oge a finishing ihe

Mmepe nke oge a na teknụzụ n'ihi na mmepụta nke gụchara ihe na-enye ohere na-emepụta ihe niile ọhụrụ na ọhụrụ ngwaahịa na a ọnụ ọgụgụ nke pụrụ iche Njirimara. Dị otú ahụ novelties emetụta polyurethane lacquer.

Nke a ihe onwunwe na-anọchi anya a dị iche iche mejupụtara ngwọta nke hydroxyl polyfunctional isocyanates. Polyurethane lacquer mgbe etinyere forms n'elu nke siri ike polima na atọ akụkụ Ọdịdị. Usoro a emee ya ruru ka mmeghachi omume nke isocyanates na hydroxyl mmiri (na-ezughị ezu polyesters nwetara site mmeghachi omume nke ngafe nke polyhydric mmanya na a dibasic acid ma ọ bụ na mixtures nke monobasic na dibasic ọdụdụ asịd).

Mgbe eji na n'omume hydrolyzed polyvinyl acetates, na-ezughị ezu polyacetals, cellulose esters, na phenol-formaldehyde resin ksilolformaldegidnye. N'etiti isocyanates eji akacha eji diisocyanate dị iche iche mixtures-ya nile. Ọzọkwa, iji hexamethylene diisocyanate na mmeghachi omume ngwaahịa nke ngafe diisocyanate na a polyhydric mmanya na hydroxyl nwere polyesters. Arụ ọrụ na ndị a ihe achọ pụrụ iche anya. Ọ bụ ya mere ndị ọzọ bara uru iji "na-egbochi" ma ọ bụ "zoro" isocyanates, ogige nke na-adị mfe akadiahade mgbe kpụ ọkụ n'ọnụ. Nke a na-agụnye mmeghachi omume ngwaahịa nke isocyanates na malonic, acetoacetic Ester, ethyleneimine na feniluretanom. Polyurethane lacquers etisasịwo iji esters, ketones, chlorinated hydrocarbons, nitroparaffins. Ngwá ọrụ ndị a diluent bụ xylene, toluene, aliphatic hydrocarbon.

Polyurethane lacquers dị ka onye-mpaghara ma ọ bụ abụọ-akụrụngwa ikwọ. Nke abụọ ahụ iche iche kwadebere ngwọta nke hydroxyl-nwere ogige, ma ọ bụ mixtures nke ndị a ogige ma isocyanate ngwọta n'ihu iji nke a gị n'ụlọnga na-agwakọta. Ndị dị otú ahụ a kwadebere abụọ-akụrụngwa lacquer na-nọ si 4 48 awa. Dị otú ahụ coatings na-eji mkpuchi nke na-ekpo ọkụ na oyi na-atụ ime. Unlimited na-ewere anụ otu-akụrụngwa ọkụ-na-agwọ coatings mere na ndabere nke na-akpọ "na-egbochi" isocyanates.

Polyurethane ghọọ Nleta a kenkowaputa, agbanwe coatings na elu ekweghị ekwe, mma adhesion, elu dielectric Njirimara na chemical-eguzogide. Ha na-esiwanye na-eji maka nchedo ihe, metal, osisi na-ebupụta na-eji maka egosipụta bụ ngwá ọrụ nke chemical, n'oké na ejegharịrị na osisi, na nri ụlọ ọrụ.

Dị polyurethane ghọọ maka parquet, ngwá ụlọ, roba, akwụkwọ, na akpụkpọ anụ, naval rụrụ, sịntetik akwa na plastik. Nke a mkpuchi dị nnọọ inogide na ihe bara uru, ya na-eme nnọọ adị ndụ nke dị iche iche ihe. One-akụrụngwa coatings na-eji maka nchedo nke ọla kọpa, aluminum na metal ngwaahịa.

Ghọọ polyurethane mmiri na-echebe osisi mgbidi na uko ụlọ nke ebu na ebù. Ọ bụ nnọọ ìhè na okpomọkụ na-eguzogide. Nke a uzo mkpuchi na-enye ohere zuru okè mata eke mara mma nke osisi.