{"id":13636,"date":"2026-01-17T03:43:09","date_gmt":"2026-01-17T03:43:09","guid":{"rendered":"https:\/\/tenessy.com\/?p=13636"},"modified":"2026-01-17T03:49:20","modified_gmt":"2026-01-17T03:49:20","slug":"hydroxyethyl-cellulose-hec-in-coatings","status":"publish","type":"post","link":"https:\/\/tenessy.com\/cs\/hydroxyethylceluloza-hec-v-naterech\/","title":{"rendered":"Hydroxyethylcelul\u00f3za (HEC) v n\u00e1t\u011brech"},"content":{"rendered":"
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\u2160.\u00davod<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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V pr\u016fmysl n\u00e1t\u011brov\u00fdch hmot<\/a>, mezi hlavn\u00ed funkce HEC pat\u0159\u00ed: zaji\u0161t\u011bn\u00ed vynikaj\u00edc\u00edch reologick\u00fdch vlastnost\u00ed p\u0159i aplikaci, zabr\u00e1n\u011bn\u00ed usazov\u00e1n\u00ed pigmentu, zlep\u0161en\u00ed stability p\u0159i skladov\u00e1n\u00ed, prodlou\u017een\u00ed doby otev\u0159en\u00ed a kontrola rozst\u0159ikov\u00e1n\u00ed a opad\u00e1v\u00e1n\u00ed. S rychl\u00fdm celosv\u011btov\u00fdm r\u016fstem popt\u00e1vky po ekologicky \u0161etrn\u00fdch n\u00e1t\u011brov\u00fdch hmot\u00e1ch na b\u00e1zi vody se HEC stal jednou z preferovan\u00fdch alternativ tradi\u010dn\u00edch p\u0159\u00edsad do n\u00e1t\u011brov\u00fdch hmot na b\u00e1zi rozpou\u0161t\u011bdel d\u00edky sv\u00e9 netoxi\u010dnosti, bez z\u00e1pachu, dobr\u00e9 biokompatibilit\u011b a vynikaj\u00edc\u00edm vlastnostem. Tento \u010dl\u00e1nek systematicky vysv\u011btluje z\u00e1kladn\u00ed vlastnosti a mechanismy fungov\u00e1n\u00ed HEC, poskytuje podrobn\u00e9 tabulky technick\u00fdch parametr\u016f a pokyny pro formulaci a zab\u00fdv\u00e1 se praktick\u00fdmi \u0159e\u0161en\u00edmi jeho pou\u017eit\u00ed v r\u016fzn\u00fdch typech n\u00e1t\u011br\u016f, \u010d\u00edm\u017e nab\u00edz\u00ed komplexn\u00ed technickou referenci pro pracovn\u00edky v\u00fdzkumu a v\u00fdvoje a in\u017een\u00fdry.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

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\u2161.Hloubkov\u00e1 anal\u00fdza HEC - od molekul\u00e1rn\u00ed struktury po z\u00e1kladn\u00ed vlastnosti<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\"HEC-Product\"\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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2.1 Molekul\u00e1rn\u00ed struktura a synt\u00e9za<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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Synt\u00e9za Hydroxyethylcelul\u00f3za<\/strong><\/a>\u00a0za\u010d\u00edn\u00e1 vysoce \u010distou \u03b1-celul\u00f3zou (obvykle z\u00edskanou z d\u0159evn\u00ed hmoty nebo bavln\u011bn\u00fdch linters\u016f). V p\u0159\u00edtomnosti alkalick\u00e9ho katalyz\u00e1toru (nap\u0159. NaOH) se aktivuj\u00ed hydroxylov\u00e9 skupiny celul\u00f3zy, n\u00e1sleduje etherifika\u010dn\u00ed reakce s ethylenoxidem, kter\u00e1 zav\u00e1d\u00ed hydroxyethylov\u00e9 postrann\u00ed \u0159et\u011bzce.<\/p>

Kl\u00ed\u010dov\u00e9 struktur\u00e1ln\u00ed parametry<\/b><\/strong><\/p>

Stupe\u0148 substituce (DS):<\/b><\/strong>\u00a0Vyjad\u0159uje pr\u016fm\u011brn\u00fd po\u010det hydroxylov\u00fdch skupin substituovan\u00fdch na jednotku anhydrogluk\u00f3zy. Komer\u010dn\u00ed HEC m\u00e1 obvykle DS mezi 1,5 a 2,5. DS ovliv\u0148uje rychlost rozpou\u0161t\u011bn\u00ed, \u010dirost roztoku a toleranci v\u016f\u010di elektrolyt\u016fm.<\/p>

Mol\u00e1rn\u00ed substituce (MS):<\/b><\/strong>\u00a0Vyjad\u0159uje pr\u016fm\u011brn\u00fd po\u010det mol\u016f ethylenoxidu v kombinaci na jednotku anhydrogluk\u00f3zy. Proto\u017ee hydroxyethylov\u00e1 skupina sama obsahuje hydroxylovou skupinu, kter\u00e1 m\u016f\u017ee d\u00e1le reagovat, m\u016f\u017ee b\u00fdt MS v\u011bt\u0161\u00ed ne\u017e DS. MS v\u00fdznamn\u011b ovliv\u0148uje retenci vody a viskozitn\u00ed vlastnosti HEC.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

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2.2 Z\u00e1kladn\u00ed fyzik\u00e1ln\u011b-chemick\u00e9 vlastnosti HEC<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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Majetek<\/strong><\/p><\/td>

Popis a typick\u00e9 hodnoty<\/strong><\/p><\/td><\/tr>

Vzhled<\/b><\/strong><\/p><\/td>

B\u00edl\u00fd a\u017e t\u00e9m\u011b\u0159 b\u00edl\u00fd pr\u00e1\u0161ek nebo granule<\/p><\/td><\/tr>

Rozpustnost<\/b><\/strong><\/p><\/td>

Snadno rozpustn\u00fd ve studen\u00e9 a hork\u00e9 vod\u011b, tvo\u0159\u00ed pr\u016fhledn\u00e9 a\u017e pr\u016fsvitn\u00e9 visk\u00f3zn\u00ed roztoky; nerozpustn\u00fd ve v\u011bt\u0161in\u011b organick\u00fdch rozpou\u0161t\u011bdel.<\/p><\/td><\/tr>

I\u00f3nsk\u00fd charakter<\/b><\/strong><\/p><\/td>

Neiontov\u00e9<\/b><\/strong>, vykazuje dobrou kompatibilitu s v\u011bt\u0161inou iontov\u00fdch p\u0159\u00edsad.<\/p><\/td><\/tr>

Rozsah viskozity<\/b><\/strong><\/p><\/td>

Velmi \u0161irok\u00fd (1% vodn\u00fd roztok, Brookfield, 25 \u00b0C), m\u016f\u017ee se pohybovat od des\u00edtek do des\u00edtek tis\u00edc milipascal\u016f za sekundu (mPa-s).<\/p><\/td><\/tr>

Stabilita pH<\/b><\/strong><\/p><\/td>

Stabiln\u00ed v rozmez\u00ed pH 2-12, optim\u00e1ln\u00ed rozsah \u00fa\u010dinnosti je pH 6-9. Dlouhodob\u00e9 skladov\u00e1n\u00ed v siln\u011b kysel\u00fdch nebo z\u00e1sadit\u00fdch podm\u00ednk\u00e1ch vede k degradaci.<\/p><\/td><\/tr>

Tepeln\u00e1 stabilita<\/b><\/strong><\/p><\/td>

Roztoky snesou kr\u00e1tkodob\u011b teplotu ~100 \u00b0C; dlouhodob\u00e9 vystaven\u00ed teplot\u011b nad 80 \u00b0C zp\u016fsobuje ztr\u00e1tu viskozity v d\u016fsledku oxidace a degradace.<\/p><\/td><\/tr>

Schopnost tvo\u0159it film<\/b><\/strong><\/p><\/td>

Mohou vytv\u00e1\u0159et pr\u016fhledn\u00e9, pru\u017en\u00e9 filmy, ale \u010dist\u00e9 filmy HEC maj\u00ed omezenou pevnost a obvykle se pou\u017e\u00edvaj\u00ed sp\u00ed\u0161e jako p\u0159\u00edsady ne\u017e jako prim\u00e1rn\u00ed filmotvorn\u00e1 l\u00e1tka.<\/p><\/td><\/tr>

Biologick\u00e1 rozlo\u017eitelnost<\/b><\/strong><\/p><\/td>

N\u00e1chyln\u00fd k mikrobi\u00e1ln\u00ed degradaci, proto mus\u00ed jeho vodn\u00e9 roztoky obsahovat vhodn\u00e9 konzerva\u010dn\u00ed l\u00e1tky.<\/p><\/td><\/tr><\/tbody><\/table>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

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2.3 Z\u00e1kladn\u00ed funk\u010dn\u00ed mechanismy<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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Mechanismus zahu\u0161\u0165ov\u00e1n\u00ed:<\/b><\/strong>\u00a0\u010cetn\u00e9 hydroxylov\u00e9 a \u00e9terov\u00e9 skupiny na molekulov\u00fdch \u0159et\u011bzc\u00edch HEC vytv\u00e1\u0159ej\u00ed s molekulami vody siln\u00e9 s\u00edt\u011b vod\u00edkov\u00fdch vazeb. Molekul\u00e1rn\u00ed \u0159et\u011bzce se hydratac\u00ed prodlu\u017euj\u00ed a zapl\u00e9taj\u00ed do vody, \u010d\u00edm\u017e v\u00fdrazn\u011b zvy\u0161uj\u00ed vnit\u0159n\u00ed t\u0159ec\u00ed odpor p\u0159i proud\u011bn\u00ed kapaliny, a t\u00edm dosahuj\u00ed \u00fa\u010dinn\u00e9ho zahu\u0161t\u011bn\u00ed.<\/p>

\u0158\u00edzen\u00ed reologie (pseudoplasticita):<\/b><\/strong>\u00a0V klidov\u00e9m stavu je s\u00ed\u0165 vod\u00edkov\u00fdch vazeb neporu\u0161en\u00e1 a syst\u00e9m vykazuje vysokou viskozitu, udr\u017euje pigmenty a odol\u00e1v\u00e1 jejich prov\u011b\u0161ov\u00e1n\u00ed. P\u0159i smyku (nap\u0159. \u0161t\u011btcem, v\u00e1lcov\u00e1n\u00edm) se s\u00ed\u0165 vod\u00edkov\u00fdch vazeb vratn\u011b naru\u0161\u00ed, molekul\u00e1rn\u00ed \u0159et\u011bzce se vyrovnaj\u00ed ve sm\u011bru smyku a viskozita se okam\u017eit\u011b sn\u00ed\u017e\u00ed, tak\u017ee aplikace je bezprobl\u00e9mov\u00e1 a film hladk\u00fd. Jakmile smyk ustane, s\u00ed\u0165 se rychle obnov\u00ed.<\/p>

Mechanismus zadr\u017eov\u00e1n\u00ed vody:<\/b><\/strong>\u00a0Vysoce hydrofiln\u00ed molekul\u00e1rn\u00ed struktura dok\u00e1\u017ee \"uzamknout\" zna\u010dn\u00e9 mno\u017estv\u00ed voln\u00e9 vody prost\u0159ednictv\u00edm vod\u00edkov\u00e9 vazby, \u010d\u00edm\u017e zpomaluje pronik\u00e1n\u00ed vody do por\u00e9zn\u00edch substr\u00e1t\u016f a jej\u00ed odpa\u0159ov\u00e1n\u00ed do vzduchu, a poskytuje tak del\u0161\u00ed \"otev\u0159en\u00fd \u010das\" pro vyrovn\u00e1n\u00ed n\u00e1t\u011bru, vyrovn\u00e1n\u00ed pigmentu a tvorbu filmu.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t

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\u2162. Hlavn\u00ed role a v\u00fdhody HEC v n\u00e1t\u011brov\u00fdch hmot\u00e1ch<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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3.1 Komplexn\u00ed proces a zvy\u0161ov\u00e1n\u00ed v\u00fdkonnosti<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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Vynikaj\u00edc\u00ed reologick\u00e1 kontrola a aplika\u010dn\u00ed vlastnosti:<\/b><\/strong>\u00a0HEC prop\u016fj\u010duje n\u00e1t\u011br\u016fm ide\u00e1ln\u00ed pseudoplastickou reologickou k\u0159ivku \"n\u00edzk\u00e1 viskozita p\u0159i vysok\u00e9m smyku, vysok\u00e1 viskozita p\u0159i n\u00edzk\u00e9m smyku\". D\u00edky tomu se n\u00e1t\u011bry snadno disperguj\u00ed, \u010derpaj\u00ed a aplikuj\u00ed (nedoch\u00e1z\u00ed k odporu p\u0159i v\u00e1lcov\u00e1n\u00ed nebo \u0161t\u011btcem), p\u0159i\u010dem\u017e viskozita se obnovuje ihned po aplikaci, co\u017e \u00fa\u010dinn\u011b zabra\u0148uje vzniku n\u00e1t\u011br\u016f.\u00a0povisl\u00fd<\/b><\/strong>\u00a0a\u00a0kapaj\u00edc\u00ed<\/b><\/strong>\u00a0na svisl\u00fdch ploch\u00e1ch a v roz\u00edch.<\/p>

Vynikaj\u00edc\u00ed zadr\u017eov\u00e1n\u00ed vody, prodlou\u017een\u00ed doby otev\u0159en\u00ed:<\/b><\/strong>\u00a0Zejm\u00e9na v interi\u00e9rov\u00fdch\/exteri\u00e9rov\u00fdch latexov\u00fdch barv\u00e1ch, tmely<\/a>a minomety<\/a>, HEC v\u00fdrazn\u011b zpomaluje ztr\u00e1ty vody a zabra\u0148uje probl\u00e9m\u016fm, jako je nap\u0159.\u00a0prask\u00e1n\u00ed f\u00f3lie, pr\u00e1\u0161en\u00ed a stopy po p\u0159ejet\u00ed.<\/b><\/strong>\u00a0zp\u016fsoben\u00e9 rychlou absorpc\u00ed vody v podkladu a vysych\u00e1n\u00edm povrchu, \u010d\u00edm\u017e se zvy\u0161uje integrita a estetika v\u00fdsledn\u00e9 f\u00f3lie.<\/p>

Vylep\u0161en\u00e1 suspenze pigment\u016f a stabilita p\u0159i skladov\u00e1n\u00ed:<\/b><\/strong>\u00a0Trojrozm\u011brn\u00e1 s\u00ed\u0165ov\u00e1 struktura vytvo\u0159en\u00e1 HEC \u00fa\u010dinn\u011b zabra\u0148uje usazov\u00e1n\u00ed a sp\u00e9k\u00e1n\u00ed pigment\u016f (nap\u0159. oxidu titani\u010dit\u00e9ho) a plniv (nap\u0159. uhli\u010ditanu v\u00e1penat\u00e9ho, kaolinu), co\u017e zaji\u0161\u0165uje, \u017ee n\u00e1t\u011br z\u016fst\u00e1v\u00e1 homogenn\u00ed po celou dobu skladovatelnosti, m\u00e1 dobrou stabilitu plechovky a st\u00e1lou barvu.<\/p>

Efektivn\u00ed kontrola rozst\u0159iku aplikace:<\/b><\/strong>\u00a0B\u011bhem nan\u00e1\u0161en\u00ed v\u00e1le\u010dkem zvy\u0161uje HEC soudr\u017enost n\u00e1t\u011bru, sni\u017euje ml\u017een\u00ed a rozst\u0159ikov\u00e1n\u00ed vznikaj\u00edc\u00ed p\u0159i vysokorychlostn\u00ed rotaci v\u00e1le\u010dku, zlep\u0161uje prost\u0159ed\u00ed pro nan\u00e1\u0161en\u00ed a sni\u017euje pl\u00fdtv\u00e1n\u00ed materi\u00e1lem.<\/p>

Zlep\u0161en\u00e9 vlastnosti filmu:<\/b><\/strong>\u00a0Podporou rovnom\u011brn\u00e9ho rozlo\u017een\u00ed pigmentu a prodlou\u017een\u00edm doby vyrovn\u00e1n\u00ed mokr\u00e9ho filmu p\u0159isp\u00edv\u00e1 HEC k vytvo\u0159en\u00ed hust\u0161\u00edho, hlad\u0161\u00edho a kryc\u00edho filmu.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

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3.2 Synergick\u00e9 \u00fa\u010dinky s jin\u00fdmi ethery celul\u00f3zy<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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HEC + MC\/HPMC:<\/b><\/strong>\u00a0MC\/HPMC<\/a> vykazuje siln\u011bj\u0161\u00ed tixotropii. V kombinaci s pseudoplasticitou HEC lze dos\u00e1hnout strm\u011bj\u0161\u00ed reologick\u00e9 k\u0159ivky a dos\u00e1hnout tak ide\u00e1ln\u00edho stavu \"extr\u00e9mn\u011b hladk\u00e9 aplikace, okam\u017eit\u00e9 tuhnut\u00ed po zastaven\u00ed\".<\/p>

HEC + CMC:<\/b><\/strong>\u00a0V levn\u00fdch tmelech a sp\u00e1rovac\u00edch hmot\u00e1ch, CMC<\/a> zaji\u0161\u0165uje rychl\u00e9 vytvo\u0159en\u00ed po\u010d\u00e1te\u010dn\u00ed viskozity, zat\u00edmco HEC zaji\u0161\u0165uje trval\u00e9 udr\u017een\u00ed viskozity, zlep\u0161uje st\u011brkovatelnost a zabra\u0148uje sesed\u00e1n\u00ed.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

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\u2163. Kl\u00ed\u010dov\u00e9 technick\u00e9 parametry a pr\u016fvodce v\u00fdb\u011brem pro HEC<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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Tabulka 1: Typy HEC klasifikovan\u00e9 podle viskozitn\u00edho stupn\u011b a jejich pou\u017eit\u00ed<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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Stupe\u0148 viskozity<\/p><\/td>

Typick\u00e1 hodnota viskozity (vodn\u00fd roztok 2%, 25 \u00b0C, mPa-s)<\/p><\/td>

Kl\u00ed\u010dov\u00e9 charakteristiky<\/p><\/td>

Doporu\u010den\u00e9 oblasti pou\u017eit\u00ed<\/p><\/td><\/tr>

Typ s n\u00edzkou viskozitou<\/b><\/strong><\/p><\/td>

100 – 3,000<\/p><\/td>

Rychl\u00e9 rozpou\u0161t\u011bn\u00ed, vysok\u00e1 pr\u016fhlednost roztoku, dobr\u00e1 tekutost<\/p><\/td>

N\u00edzkovisk\u00f3zn\u00ed interi\u00e9rov\u00e9\/exteri\u00e9rov\u00e9 barvy, bezbarv\u00e9 vrchn\u00ed n\u00e1t\u011bry, barvy na vodn\u00ed b\u00e1zi, syst\u00e9my vy\u017eaduj\u00edc\u00ed vysokou vyrovn\u00e1vac\u00ed vrstvu<\/p><\/td><\/tr>

Typ st\u0159edn\u00ed viskozity<\/b><\/strong><\/p><\/td>

3,000 – 10,000<\/p><\/td>

Univerz\u00e1ln\u00ed, vyv\u00e1\u017een\u00e9 zahu\u0161\u0165ov\u00e1n\u00ed, zadr\u017eov\u00e1n\u00ed vody a aplika\u010dn\u00ed vlastnosti<\/p><\/td>

Standardn\u00ed interi\u00e9rov\u00e9 latexov\u00e9 barvy, projektov\u00e9 barvy, architektonick\u00e9 n\u00e1t\u011bry st\u0159edn\u00ed t\u0159\u00eddy, lepidla<\/p><\/td><\/tr>

Typ s vysokou viskozitou<\/b><\/strong><\/p><\/td>

10,000 – 30,000<\/p><\/td>

Vysok\u00e1 \u00fa\u010dinnost zahu\u0161\u0165ov\u00e1n\u00ed, vynikaj\u00edc\u00ed schopnost zadr\u017eovat vodu, siln\u00e1 ochrana proti sr\u00e1\u017een\u00ed.<\/p><\/td>

Vn\u011bj\u0161\u00ed strukturovan\u00e9 n\u00e1t\u011bry, elastick\u00e9 n\u00e1t\u011bry, reli\u00e9fn\u00ed barvy, tmely, vodot\u011bsn\u00e9 ka\u0161e.<\/p><\/td><\/tr>

Typ s velmi vysokou viskozitou<\/b><\/strong><\/p><\/td>

> 30,000<\/p><\/td>

Extr\u00e9mn\u011b vysok\u00e1 \u00fa\u010dinnost zahu\u0161\u0165ov\u00e1n\u00ed a zadr\u017eov\u00e1n\u00ed vody, siln\u00e1 tendence k tvorb\u011b filmu<\/p><\/td>

Tmely s vysok\u00fdm obsahem pevn\u00e9 l\u00e1tky, zdic\u00ed\/om\u00edtac\u00ed malty, lepidla na dla\u017edice<\/a>, speci\u00e1ln\u00ed tmely<\/p><\/td><\/tr><\/tbody><\/table>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

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\n\t\t\t\t\t

Tabulka 2: Vliv typick\u00e9ho d\u00e1vkov\u00e1n\u00ed HEC na vlastnosti n\u00e1t\u011bru<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
\n\t\t\t\t
\n\t\t\t\t\t\t\t\t\t

Aplika\u010dn\u00ed syst\u00e9m<\/p><\/td>

Doporu\u010den\u00e9 d\u00e1vkov\u00e1n\u00ed HEC (na z\u00e1klad\u011b celkov\u00e9 hmotnosti p\u0159\u00edpravku %)<\/p><\/td>

Prim\u00e1rn\u00ed \u00fa\u010dinnost<\/p><\/td>

Bezpe\u010dnostn\u00ed opat\u0159en\u00ed<\/p><\/td><\/tr>

Interi\u00e9rov\u00e1 latexov\u00e1 barva<\/b><\/strong><\/p><\/td>

0.15% – 0.40%<\/p><\/td>

Zaji\u0161\u0165uje z\u00e1kladn\u00ed viskozitu, zlep\u0161uje zadr\u017eov\u00e1n\u00ed vody, zabra\u0148uje rozst\u0159ikov\u00e1n\u00ed.<\/p><\/td>

\u010casto se m\u00eds\u00ed s HEUR, aby se optimalizovala reologie p\u0159i vysok\u00e9m smyku.<\/p><\/td><\/tr>

Vn\u011bj\u0161\u00ed elastick\u00fd povlak<\/b><\/strong><\/p><\/td>

0.25% – 0.50%<\/p><\/td>

zabra\u0148uje rozp\u00edjen\u00ed, prodlu\u017euje dobu otev\u0159en\u00ed, suspenduje pigmenty<\/p><\/td>

Vyb\u00edrejte druhy s dobrou odolnost\u00ed proti vod\u011b a pov\u011btrnostn\u00edm vliv\u016fm<\/p><\/td><\/tr>

Tmel\/s\u00e1dra S\u00e1dra<\/b><\/strong><\/p><\/td>

0.3% – 0.8%<\/p><\/td>

Vynikaj\u00edc\u00ed zadr\u017eov\u00e1n\u00ed vody, zlep\u0161uje st\u011brkovatelnost a zabra\u0148uje sesed\u00e1n\u00ed.<\/p><\/td>

Vysok\u00e9 d\u00e1vkov\u00e1n\u00ed m\u016f\u017ee ovlivnit kone\u010dnou pevnost a odolnost proti vod\u011b.<\/p><\/td><\/tr>

Pr\u016fmyslov\u00e1 barva na vodn\u00ed b\u00e1zi<\/b><\/strong><\/p><\/td>

0.1% – 0.3%<\/p><\/td>

Zabra\u0148uje usazov\u00e1n\u00ed, zlep\u0161uje pr\u016ftok a vyrovn\u00e1v\u00e1n\u00ed.<\/p><\/td>

Kompatibilita se syst\u00e9mov\u00fdmi rozpou\u0161t\u011bdly a prysky\u0159icemi<\/p><\/td><\/tr>

Lepidlo na dla\u017edice<\/b><\/strong><\/p><\/td>

0.2% – 0.6%<\/p><\/td>

Zadr\u017euje vodu a podporuje hydrataci cementu, zlep\u0161uje protiskluzov\u00e9 vlastnosti.<\/p><\/td>

Pou\u017eit\u00ed vysoce visk\u00f3zn\u00edch t\u0159\u00edd m\u00e1 v\u00fdrazn\u011bj\u0161\u00ed \u00fa\u010dinky.<\/p><\/td><\/tr><\/tbody><\/table>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

\n\t\t\t\t
\n\t\t\t\t\t

\u2164. \u0158e\u0161en\u00ed pro praktick\u00e9 pou\u017eit\u00ed<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
\n\t\t\t\t
\n\t\t\t\t\t\t\t\t\t

Proces rozpou\u0161t\u011bn\u00ed a disperze (kl\u00ed\u010d k zamezen\u00ed vzniku hrudek)<\/b><\/strong>
Doporu\u010den\u00e1 metoda (p\u0159\u00edm\u00fd p\u0159\u00eddavek pr\u00e1\u0161ku):<\/b><\/strong><\/p>

Za intenzivn\u00edho m\u00edch\u00e1n\u00ed pomalu nasypte pr\u00e1\u0161ek HEC do v\u00edru vody.<\/p>

Pokra\u010dujte v m\u00edch\u00e1n\u00ed, dokud nejsou \u010d\u00e1stice zcela rozpt\u00fdleny a sm\u00e1\u010deny; v t\u00e9to f\u00e1zi se m\u016f\u017ee roztok st\u00e1le jevit zakalen\u00fd.<\/p>

Upravte pH na 8-9 (m\u016f\u017ee urychlit rozpou\u0161t\u011bn\u00ed) nebo nechte 1-2 hodiny zr\u00e1t, dokud roztok nebude \u010dir\u00fd a stejnom\u011brn\u00fd.
Alternativn\u00ed metoda (metoda p\u0159edm\u00edch\u00e1n\u00ed):<\/b><\/strong>
P\u0159edem rovnom\u011brn\u011b sm\u00edchejte pr\u00e1\u0161ek HEC s ostatn\u00edmi pr\u00e1\u0161kov\u00fdmi materi\u00e1ly ve slo\u017een\u00ed (nap\u0159. s oxidem titani\u010dit\u00fdm, plnivy) nebo s kapalinami nerozpustn\u00fdmi ve vod\u011b (nap\u0159. s ethylenglykolem) a pak tuto sm\u011bs p\u0159idejte do vody za m\u00edch\u00e1n\u00ed. Tato metoda \u00fa\u010dinn\u011b zabra\u0148uje aglomeraci.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

\n\t\t\t\t
\n\t\t\t\t\t

\u2165. Z\u00e1v\u011br<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
\n\t\t\t\t
\n\t\t\t\t\t\t\t\t\t

Jako technologicky vysp\u011bl\u00fd podnik specializuj\u00edc\u00ed se na v\u00fdzkum, v\u00fdvoj a v\u00fdrobu ethery celul\u00f3zy<\/a>, TENESSY<\/a> hluboce ch\u00e1pe, \u017ee v\u00fdvoj modern\u00edch vysoce v\u00fdkonn\u00fdch n\u00e1t\u011br\u016f se posunul za pouh\u00e9 p\u0159id\u00e1n\u00ed vlastnost\u00ed jedn\u00e9 suroviny. A\u0165 u\u017e se jedn\u00e1 o du\u00e1ln\u00ed s\u00ed\u0165 \"bulk-interface\" pro zadr\u017eov\u00e1n\u00ed vody, kterou vytv\u00e1\u0159\u00ed HEC a HPMC, nebo o v\u00edcerozm\u011brnou v\u00fdkonnostn\u00ed matrici tvo\u0159enou HEC s r\u016fzn\u00fdmi zahu\u0161\u0165ovadly a p\u0159\u00edsadami, j\u00e1dro spo\u010d\u00edv\u00e1 v p\u0159esn\u00e9m slad\u011bn\u00ed a maximalizaci \u00fa\u010dinnosti.<\/p>

Spol\u00e9h\u00e1n\u00ed se na p\u0159esnou kontrolu nad\u00a0molekul\u00e1rn\u00ed struktura, stupe\u0148 substituce, stupn\u011b viskozity a reologick\u00e9 chov\u00e1n\u00ed.<\/b><\/strong>\u00a0ether\u016f celul\u00f3zy m\u016f\u017ee spole\u010dnost TENESSY nejen dod\u00e1vat jednotliv\u00e9 vysoce \u00fa\u010dinn\u00e9 produkty (jako jsou HEC a HPMC s r\u016fznou viskozitou), ale tak\u00e9 na z\u00e1klad\u011b hlubok\u00e9ho porozum\u011bn\u00ed formula\u010dn\u00edm syst\u00e9m\u016fm n\u00e1t\u011br\u016f poskytovat z\u00e1kazn\u00edk\u016fm\u00a0\"Synergick\u00e1 \u0159e\u0161en\u00ed s \u00e9terem celul\u00f3zy\"<\/b><\/strong>. Sna\u017e\u00edme se pom\u00e1hat z\u00e1kazn\u00edk\u016fm:<\/p>

P\u0159esn\u00fd n\u00e1vrh reologick\u00fdch k\u0159ivek:<\/b><\/strong>\u00a0Dos\u00e1hn\u011bte ide\u00e1ln\u00ed reologick\u00e9 kontroly v cel\u00e9m procesu od skladov\u00e1n\u00ed a aplikace a\u017e po tvorbu filmu prost\u0159ednictv\u00edm v\u011bdeck\u00e9ho slo\u017een\u00ed produkt\u016f, jako jsou HEC a HPMC.<\/p>

P\u0159ekon\u00e1n\u00ed specifick\u00fdch aplika\u010dn\u00edch probl\u00e9m\u016f:<\/b><\/strong>\u00a0Poskytujeme p\u0159izp\u016fsobenou formula\u010dn\u00ed podporu zalo\u017eenou na synergick\u00fdch \u00fa\u010dinc\u00edch ether\u016f celul\u00f3zy pro \u0159e\u0161en\u00ed probl\u00e9m\u016f, jako je prask\u00e1n\u00ed na rychle schnouc\u00edch podkladech, prov\u011b\u0161ov\u00e1n\u00ed vertik\u00e1ln\u00edch siln\u00fdch n\u00e1t\u011br\u016f a aplikace v prost\u0159ed\u00ed s vysok\u00fdmi teplotami.<\/p>

Optimalizace komplexn\u00ed n\u00e1kladov\u00e9 efektivity:<\/b><\/strong>\u00a0Dos\u00e1hn\u011bte optim\u00e1ln\u00ed rovnov\u00e1hy mezi n\u00e1klady na suroviny a efektivitou v\u00fdroby a z\u00e1rove\u0148 zajist\u011bte nebo dokonce zvy\u0161te v\u00fdsledn\u00fd v\u00fdkon n\u00e1t\u011bru pomoc\u00ed v\u011bdeck\u00fdch synergick\u00fdch formulac\u00ed.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>","protected":false},"excerpt":{"rendered":"

V pr\u016fmyslu n\u00e1t\u011brov\u00fdch hmot mezi hlavn\u00ed funkce HEC pat\u0159\u00ed: zaji\u0161t\u011bn\u00ed vynikaj\u00edc\u00edch reologick\u00fdch vlastnost\u00ed p\u0159i aplikaci, zabr\u00e1n\u011bn\u00ed usazov\u00e1n\u00ed pigmentu, zlep\u0161en\u00ed stability p\u0159i skladov\u00e1n\u00ed, prodlou\u017een\u00ed doby otev\u0159enosti a kontrola rozst\u0159ikov\u00e1n\u00ed a opad\u00e1v\u00e1n\u00ed. <\/p>","protected":false},"author":1,"featured_media":5911,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"footnotes":""},"categories":[35],"tags":[],"class_list":["post-13636","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-industry-news"],"yoast_head":"\nHydroxyethyl Cellulose (HEC) in Coatings - HPMC|HEMC|HEC|RDP Manufacturer-TENESSY<\/title>\n<meta name=\"description\" content=\"In the coatings industry, HEC's main functions include: imparting excellent rheological properties to coatings, preventing pigment sedimentation, and extending open time.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/tenessy.com\/cs\/hydroxyethylceluloza-hec-v-naterech\/\" \/>\n<meta property=\"og:locale\" content=\"cs_CZ\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Hydroxyethyl Cellulose (HEC) in Coatings - 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