{"id":60,"date":"2026-06-04T08:51:43","date_gmt":"2026-06-04T08:51:43","guid":{"rendered":"https:\/\/dispersingagent.net\/?p=60"},"modified":"2026-06-04T08:52:22","modified_gmt":"2026-06-04T08:52:22","slug":"dreifiefni-munurinn-a-godri-molunarbundnu-undirlagi-og-einu-sem-berst-gegn-ther-a-hverju-skrefi","status":"publish","type":"post","link":"https:\/\/dispersingagent.net\/is\/dispersing-agent-the-difference-between-a-good-millbase-and-one-that-fights-you-every-step\/","title":{"rendered":"Dreifingarefni: Munurinn \u00e1 g\u00f3\u00f0ri millibasis og \u00feeirri sem berst gegn \u00fe\u00e9r \u00e1 hverju skrefi"},"content":{"rendered":"<p dir=\"auto\">Eftir meira en tuttugu og fimm \u00e1r \u00ed a\u00f0 framkv\u00e6ma dreifanapr\u00f3fanir og leysa vandam\u00e1l me\u00f0 framlei\u00f0slulotur hef \u00e9g l\u00e6rt a\u00f0 g\u00e6\u00f0i endanlegrar h\u00fa\u00f0unar \u00e1kvar\u00f0ast oft \u00e1 fyrstu \u00ferj\u00e1t\u00edu m\u00edn\u00fatum m\u00f6lunargrunnsins. Ef litarefni og fylliefni dreifast ekki r\u00e9tt fr\u00e1 upphafi getur\u00f0u eytt restinni af deginum \u00ed a\u00f0 elta \u00feykktarsveiflur, slaka lit\u00fer\u00f3un e\u00f0a setg\u00f6ng \u00ed d\u00f3sinni. \u00dearna s\u00fdna dreifiefni gildi sitt. \u00deau l\u00e1ta ekki bara litarefni blotna hra\u00f0ar \u2014 \u00feau halda agnunum a\u00f0skildum svo kerfi\u00f0 allt haldist st\u00f6\u00f0ugt \u00ed gegnum framlei\u00f0slu, geymslu og notkun.<\/p>\n<p dir=\"auto\"><!--more--><\/p>\n<p dir=\"auto\">Skj\u00e1virkjandi efni virkar me\u00f0 \u00fev\u00ed a\u00f0 festast \u00e1 yfirbor\u00f0i litar og mynda hindrun sem kemur \u00ed veg fyrir enduragnun. \u00cd vatnsbundnum kerfum er \u00feetta oft rafst\u00f6\u00f0uhneig\u00f0 fr\u00e1 hla\u00f0num h\u00f3pum (svo sem karbox\u00fdl\u00f6tum \u00e1 p\u00f3l\u00fdakr\u00fdlatum). \u00cd kerfum sem byggja \u00e1 leysiefnum e\u00f0a eru me\u00f0 h\u00e1an f\u00f6stuefnisinnihald er st\u00e6r\u00f0arhindrun fr\u00e1 l\u00f6ngum p\u00f3l\u00fdmerke\u00f0jum yfirleitt mikilv\u00e6gari. Sumir n\u00fat\u00edmalegir p\u00f3l\u00fdmerdreifiefni sameina b\u00e1\u00f0a \u00feessa mekanisma. Ni\u00f0ursta\u00f0an er l\u00e6gri seigja vi\u00f0 h\u00e6rra litarefnisinnihald, styttri m\u00f6linart\u00edmi, betri litstyrkur og minni setjun me\u00f0 t\u00edmanum.<\/p>\n<p dir=\"auto\">\u00c9g man enn eftir einu vatnsbundnu arkitekt\u00farm\u00e1lningarverkefni \u00fear sem munurinn var dramat\u00edskur. Vi\u00f0 vorum a\u00f0 dreifa venjulegu r\u00fat\u00edltitand\u00edox\u00ed\u00f0i (20 % PVC) \u00e1samt rau\u00f0u l\u00edfr\u00e6nu litaskapi \u00ed akr\u00fdl-emulsj\u00f3narkerfi. \u00c1n nokkurs dreifiefnis h\u00e6kka\u00f0i seigja millibasisins yfir 8000 mPa\u00b7s innan t\u00edu m\u00edn\u00fatna af h\u00e1hra\u00f0adreifingu, Hegman-m\u00f6lun n\u00e1\u00f0i aldrei undir 4 og eftir \u00ferj\u00e1 daga f\u00f3r rau\u00f0i litarefni\u00f0 a\u00f0 flj\u00f3ta upp og fl\u00f6gnast. Litastyrkur var um 15 % undir markmi\u00f0i, og glans vi\u00f0 60\u00b0 \u00e1 \u00feurrku\u00f0u filmu var a\u00f0eins 42 einingar.<\/p>\n<p dir=\"auto\">Vi\u00f0 keyr\u00f0um s\u00ed\u00f0an s\u00f6mu form\u00falu me\u00f0 \u00feremur mismunandi dreifiefnum me\u00f0 1,2% virka efnisins mi\u00f0a\u00f0 vi\u00f0 pigment\u00feyngd:<\/p>\n<ul dir=\"auto\">\n<li>Venjulegt amm\u00f3n\u00edum-p\u00f3l\u00fdakr\u00fdlat gaf seigju upp \u00e1 3200 mPa\u00b7s eftir dreifingu, Hegman 6,5, og st\u00f6\u00f0ugan lit eftir 30 daga geymslu (\u0394E &lt; 0,8). Glans batna\u00f0i \u00ed 58 einingar.<\/li>\n<li>Dispersant \u00far p\u00f3l\u00fd\u00faretan me\u00f0 h\u00e6rra sameindamassa l\u00e6kka\u00f0i seigju enn frekar \u00ed 2100 mPa\u00b7s, n\u00e1\u00f0i Hegman-stigi 7 og skila\u00f0i bestu litstyrk (+12 % litstyrkur mi\u00f0a\u00f0 vi\u00f0 samanbur\u00f0arh\u00f3pinn). Eftir 30 daga var Delta E a\u00f0eins 0,4 og glans h\u00e9lt s\u00e9r \u00ed 61 einingu.<\/li>\n<li>Fosfatbundinn dreifingarefni st\u00f3\u00f0 sig vel hva\u00f0 var\u00f0ar seigju (2400 mPa\u00b7s) en s\u00fdndi sm\u00e1v\u00e6gilega \u00f3samr\u00fdmanleika vi\u00f0 akr\u00fdlbindiefni\u00f0 \u2014 vi\u00f0 s\u00e1um \u00f6rsm\u00e1ar holur \u00ed dr\u00e1ttarmynstrum og 4 eininga l\u00e6kkun \u00e1 glj\u00e1a.<\/li>\n<\/ul>\n<p dir=\"auto\">P\u00f3l\u00fd\u00faretan\u00fatg\u00e1fan vann verki\u00f0 vegna \u00feess a\u00f0 h\u00fan gaf besta jafnv\u00e6gi milli l\u00e1gs seigju, hra\u00f0rar dreifingar og langt\u00edma st\u00f6\u00f0ugleika \u00e1n aukaverkana \u00e1 filmu. Vi\u00f0 notu\u00f0um \u00fea\u00f0 a\u00f0 lokum me\u00f0 0,9 % virka eftir a\u00f0 hafa f\u00ednstillt skammtastillingarferilinn. Verksmi\u00f0jan t\u00f3k einnig eftir \u00fev\u00ed a\u00f0 h\u00fan gat auki\u00f0 TiO\u2082-magn um 8 % \u00e1n \u00feykkna\u00f0arvandam\u00e1la, sem b\u00e6tti hulnun og l\u00e6kka\u00f0i heildarkostna\u00f0 form\u00falunnar.<\/p>\n<p dir=\"auto\">\u00deessi tilraun kenndi m\u00e9r nokkur hagn\u00fdt l\u00e6rd\u00f3msatri\u00f0i. \u00cd fyrsta lagi skiptir skammtur meira m\u00e1li en flestir gera r\u00e1\u00f0 fyrir. Of l\u00edtill skammtur veldur flokkun s\u00ed\u00f0ar; of st\u00f3r skammtur getur aftur auki\u00f0 seigju e\u00f0a skert vatns\u00feol. \u00c9g geri alltaf stiga\u00adr\u00f6\u00f0 fr\u00e1 0,5 % upp \u00ed 2,5 % virks efnis \u00e1 litarefni og fylgist b\u00e6\u00f0i me\u00f0 m\u00f6lunark\u00farfunni og geymslu\u00adst\u00f6\u00f0ugleika.<\/p>\n<p dir=\"auto\">\u00cd \u00f6\u00f0ru lagi \u00fearf efnafr\u00e6\u00f0in a\u00f0 passa vi\u00f0 kerfi\u00f0. P\u00f3l\u00fdakr\u00fdlatar eru \u00f3d\u00fdrir og \u00e1hrifar\u00edkir \u00ed m\u00f6rgum vatnsbundnum skreytingam\u00e1lningum, en \u00feeir geta veri\u00f0 vi\u00f0kv\u00e6mir fyrir raf-j\u00f3num og pH-sveiflum. Pol\u00fdmer\u00edskir dreifiefni (\u00far p\u00f3l\u00fd\u00faretan- e\u00f0a p\u00f3l\u00fdeterflokkum) kosta meira en veita betri frammist\u00f6\u00f0u me\u00f0 erfi\u00f0um l\u00edfr\u00e6num litarefnum og \u00ed kerfum sem krefjast mikils glj\u00e1a e\u00f0a g\u00f3\u00f0rar \u00fativistar\u00feols. \u00cd \u00feynnu- e\u00f0a epox\u00fdm\u00e1lningum sem byggja \u00e1 leysiefnum gr\u00edp \u00e9g enn\u00fe\u00e1 oftar til fitus\u00fdru- e\u00f0a breyttra akr\u00fdltegunda.<\/p>\n<p dir=\"auto\">\u00cd \u00feri\u00f0ja lagi er raunpr\u00f3fi\u00f0 aldrei bara upphaflegi m\u00f6lunin. \u00c9g athuga alltaf seigju eftir 24 klukkustundir og eftir viku, geri n\u00faningapr\u00f3f til a\u00f0 meta litavi\u00f0t\u00f6ku og framkv\u00e6mi hra\u00f0a\u00f0a geymslu (50 \u00b0C \u00ed tv\u00e6r vikur) til a\u00f0 sj\u00e1 hvort fl\u00f3kkun e\u00f0a fl\u00f3\u00f0myndun komi fram. Margir \u201cg\u00f3\u00f0ir\u201d ranns\u00f3knarstofuh\u00f3par mistakast \u00e1 \u00feessu stigi.<\/p>\n<p dir=\"auto\">Af reynslu vir\u00f0ast mestu \u00e1vinningarnir koma \u00feegar \u00fe\u00fa eykur pigmentmagn e\u00f0a vinnur me\u00f0 pigment sem erfitt er a\u00f0 dreifa, eins og \u00e1kve\u00f0nar ftalocyan\u00ednar e\u00f0a kolabl\u00e1ar. \u00cd einu bleksverkefni ger\u00f0i skipti \u00e1 s\u00e9rsni\u00f0num p\u00f3l\u00fdmer\u00edskum dreifiefni okkur kleift a\u00f0 auka kolabl\u00e1kmagn \u00far 12 % \u00ed 18 % \u00e1 sama t\u00edma og seigja var haldi\u00f0 undir 1500 mPa\u00b7s. S\u00fa eina breyting b\u00e6tir svarthv\u00edta og minnka\u00f0i fj\u00f6lda fer\u00f0a \u00ed perlum\u00f6lun \u00far fj\u00f3rum \u00ed tvo.<\/p>\n<p dir=\"auto\">Au\u00f0vita\u00f0 eru dreifiefni ekki t\u00f6fralausn. \u00deau laga ekki sl\u00e6ma litarefnisg\u00e6\u00f0i, rangt m\u00f6lu\u00f0 mi\u00f0il e\u00f0a \u00f3fulln\u00e6gjandi skur\u00f0. \u00deau b\u00e6ta einnig kostna\u00f0i og geta stundum haft \u00e1hrif \u00e1 a\u00f0ra eiginleika \u2014 fro\u00f0umyndun, vatns\u00feol e\u00f0a festu milli laga ef rangt val er gert.<\/p>\n<p dir=\"auto\">A\u00f0 lokum er r\u00e9tti dreifingarefni\u00f0 enn ein af \u00feeim \u00e1kv\u00f6r\u00f0unum sem skilar mestum \u00e1vinningi \u00ed form\u00faluger\u00f0. \u00deegar \u00fea\u00f0 virkar f\u00e6r\u00f0u hra\u00f0ari framlei\u00f0slu, st\u00f6\u00f0ugri lotur, betri lit og f\u00e6rri kvartanir fr\u00e1 vi\u00f0skiptavinum. \u00deegar \u00fea\u00f0 virkar ekki berst \u00fe\u00fa vi\u00f0 millbase-i\u00f0 \u00e1 hverjum degi. Verksmi\u00f0jurnar sem taka val \u00e1 dreifiefni sem alvarlegt form\u00falunarstarf \u2014 framkv\u00e6ma vi\u00f0eigandi samanbur\u00f0artilraunir og m\u00e6la hva\u00f0 raunverulega gerist eftir geymslu og notkun \u2014 eru \u00fe\u00e6r sem h\u00e6tta a\u00f0 elta vandam\u00e1l og byrja a\u00f0 n\u00e1 markmi\u00f0um st\u00f6\u00f0ugt.<\/p>","protected":false},"excerpt":{"rendered":"<p>After more than twenty-five years running dispersion trials and troubleshooting production batches, I\u2019ve learned that the quality of the final coating often gets decided in the first thirty minutes of the millbase. If the pigments and fillers don\u2019t disperse properly right from the start, you can spend the rest of the day chasing viscosity spikes, [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_seopress_robots_primary_cat":"none","_seopress_titles_title":"","_seopress_titles_desc":"","_seopress_robots_index":"","footnotes":""},"categories":[3],"tags":[],"class_list":["post-60","post","type-post","status-publish","format-standard","hentry","category-news"],"_links":{"self":[{"href":"https:\/\/dispersingagent.net\/is\/wp-json\/wp\/v2\/posts\/60","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/dispersingagent.net\/is\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/dispersingagent.net\/is\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/dispersingagent.net\/is\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/dispersingagent.net\/is\/wp-json\/wp\/v2\/comments?post=60"}],"version-history":[{"count":2,"href":"https:\/\/dispersingagent.net\/is\/wp-json\/wp\/v2\/posts\/60\/revisions"}],"predecessor-version":[{"id":64,"href":"https:\/\/dispersingagent.net\/is\/wp-json\/wp\/v2\/posts\/60\/revisions\/64"}],"wp:attachment":[{"href":"https:\/\/dispersingagent.net\/is\/wp-json\/wp\/v2\/media?parent=60"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/dispersingagent.net\/is\/wp-json\/wp\/v2\/categories?post=60"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/dispersingagent.net\/is\/wp-json\/wp\/v2\/tags?post=60"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}