{"id":820,"date":"2022-01-16T18:13:36","date_gmt":"2022-01-16T16:13:36","guid":{"rendered":"https:\/\/aitanachem.com\/mineral-fillers-for-composite\/dolomite-mineral-filler\/"},"modified":"2026-08-14T19:25:49","modified_gmt":"2026-08-14T17:25:49","slug":"dolomite-mineral-filler","status":"publish","type":"page","link":"https:\/\/aitanachem.com\/en\/mineral-fillers-for-composite\/dolomite-mineral-filler\/","title":{"rendered":"Micronized dolomite filler for composites and polyester resins"},"content":{"rendered":"\t\t<div data-elementor-type=\"wp-page\" data-elementor-id=\"820\" class=\"elementor elementor-820 elementor-163\" data-elementor-post-type=\"page\">\n\t\t\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-6fef32a4 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"6fef32a4\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container 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85.5 0 112v19c0 7.4 3.4 14.3 9.2 18.9 30.6 23.9 40.7 32.4 173.4 128.7 16.8 12.2 50.2 41.8 73.4 41.4z\"><\/path><\/svg>\t\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"elementor-share-btn__text\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-share-btn__title\">\n\t\t\t\t\t\t\t\t\t\tEmail\t\t\t\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-0502544 elementor-align-left elementor-widget elementor-widget-global elementor-global-1065 elementor-global-643 elementor-widget-breadcrumbs\" data-id=\"0502544\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"breadcrumbs.default\">\n\t\t\t\t\t<p id=\"breadcrumbs\"><span><span><a href=\"https:\/\/aitanachem.com\/en\/\">Home<\/a><\/span><\/span><\/p>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-8556254 elementor-widget elementor-widget-text-editor\" data-id=\"8556254\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p><strong>Dolomite is one of the most widely used mineral fillers in the manufacture of polymer-matrix composites, paints, plastics, rubbers and many other industrial sectors.<\/strong> Dolomite fillers help us optimize formulation cost, improve mold flow and increase density in sanitaryware and industrial castings. <strong>At AITANACHEM we supply one of the highest-whiteness, highest chemical-purity dolomites in the world<\/strong>, with rigorous grain-size and moisture control that guarantees final product quality. On this page, we explain what dolomite is, its properties and main applications, and how to choose the right dolomite for your formulation and industrial process.<\/p>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-daca40b elementor-widget elementor-widget-image\" data-id=\"daca40b\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img fetchpriority=\"high\" decoding=\"async\" width=\"768\" height=\"574\" src=\"https:\/\/aitanachem.com\/wp-content\/uploads\/2022\/01\/dolomita-768x574.webp\" class=\"attachment-medium_large size-medium_large wp-image-734\" alt=\"Dolomite mineral filler\" srcset=\"https:\/\/aitanachem.com\/wp-content\/uploads\/2022\/01\/dolomita-768x574.webp 768w, https:\/\/aitanachem.com\/wp-content\/uploads\/2022\/01\/dolomita-300x224.webp 300w, https:\/\/aitanachem.com\/wp-content\/uploads\/2022\/01\/dolomita.webp 800w\" sizes=\"(max-width: 768px) 100vw, 768px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-23e9cfb elementor-widget elementor-widget-heading\" data-id=\"23e9cfb\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">What is dolomite?<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-8deffab elementor-widget elementor-widget-text-editor\" data-id=\"8deffab\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p><strong>Dolomite is a natural mineral made up of a double carbonate of calcium and magnesium.<\/strong> The same name is also used for the rock (dolostone) mostly composed of this mineral. Dolomite consists of <strong>roughly half calcium carbonate and half magnesium carbonate<\/strong>, which distinguishes it from pure calcium carbonate (calcite). It is quarried and processed by milling, screening and micronization into a wide range of particle sizes, from micronized powders to coarse aggregates. <strong>As a mineral filler \u2014or dolomite filler\u2014 it is one of the most widely employed in composites due to its excellent balance between performance and cost.<\/strong><\/p>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-ffbe17e elementor-widget elementor-widget-heading\" data-id=\"ffbe17e\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Chemical composition and properties of dolomite<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-9905b1f elementor-widget elementor-widget-text-editor\" data-id=\"9905b1f\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p>From a chemical perspective, dolomite corresponds to the formula CaMg(CO\u2083)\u2082: a double calcium and magnesium carbonate. Its main properties as a mineral filler are:<\/p>\n<ul>\n<li><strong>Medium hardness<\/strong> (around 3.5-4 on the Mohs scale) and good chemical stability.<\/li>\n<li><strong>Low oil absorption<\/strong> and excellent compatibility with resins and binders.<\/li>\n<li><strong>Insoluble in water<\/strong> and chemically stable under normal conditions.<\/li>\n<li><strong>Colour and whiteness<\/strong>: In its pure state, it presents white or off-white shades; whiteness is a highly valued factor in certain applications.<\/li>\n<\/ul>\n<p>For industrial use, key parameters to control include particle size distribution, chemical purity (preventing impurities such as iron and manganese), whiteness and moisture content.<\/p>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-6a6809b elementor-widget elementor-widget-heading\" data-id=\"6a6809b\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Types of dolomite: from micronized filler to coarse aggregates<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-89d3865 elementor-widget elementor-widget-text-editor\" data-id=\"89d3865\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p>Dolomite is supplied across a broad granulometric range covering ultrafine powders to coarse aggregates:<\/p>\n<ul>\n<li><strong>Micronized dolomite or filler<\/strong>: a fine powder; it is the most widely used form as a mineral filler in composites, coatings, and plastics.<\/li>\n<li><strong>Crushed and rounded dolomite<\/strong>: coarser grades intended for construction, mortars and concretes.<\/li>\n<li><strong>Calcined dolomite<\/strong>: obtained by heating dolomite to remove CO\u2082, producing dolomitic lime, used in the steel industry, refractories and agriculture.<\/li>\n<\/ul>\n<p>Selecting the appropiate particle size is decisive for filler behavior in the mix and the final product.<\/p>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-beae6cb elementor-widget elementor-widget-heading\" data-id=\"beae6cb\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Applications and uses of dolomite<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-66fe339 elementor-widget elementor-widget-text-editor\" data-id=\"66fe339\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p>The uses of dolomite depend on its physical and chemical properties. Among the most common applications are:<\/p>\n<ul>\n<li><strong>Resin sanitaryware<\/strong>: massively used as a bulk filler for gelcoated parts (shower trays, bathtubs and washbasins), providing body to the casting, absorbing part from the exothermic reaction heat and increasing mechanical rigidity after demouldeding. When weight reduction is the goal, dolomite is fully or partially replaced by <a href=\"https:\/\/aitanachem.com\/en\/mineral-fillers-for-composite\/light-weight-fillers\/\" target=\"_blank\" rel=\"noopener\"><strong><u>light weight fillers<\/u>.<\/strong><\/a><\/li>\n<li><strong>Polymer concrete and engineered stone<\/strong>: in the manufacture of drainage channels, gratings, fa\u00e7ade panels and urban elements, dolomite acts as a fine aggregate and micronized filler to close porosity between coarse particles, improving flexural-compressive strength and mechanical impact resistance.<\/li>\n<li><strong>Paints and coatings<\/strong>: as a bulk filler and to provide whiteness.<\/li>\n<li><strong>Plastics and adhesives<\/strong>: as a functional filler to modify properties and lower cost.<\/li>\n<li><strong>Rubbers and elastomers<\/strong>: as a reinforcing and bulk filler.<\/li>\n<li><strong>Ceramics, terrazzo and glass manufacturing<\/strong>.<\/li>\n<li><strong>Agriculture<\/strong>: as a source of calcium and magnesium, correcting soil acidity and improving crop yields.<\/li>\n<li><strong>Steel industry<\/strong>: as a fluxing agent in metallurgical processes.<\/li>\n<\/ul>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-b0e5d33 elementor-widget elementor-widget-heading\" data-id=\"b0e5d33\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Technical advantages of micronized dolomite in composite manufacturing<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-878ba25 elementor-widget elementor-widget-text-editor\" data-id=\"878ba25\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p>Integrating our high-whiteness, high-purity dolomite fillers into your formulations brings essential operational and economic benefits during the molding process:<\/p>\n<ul>\n<li><strong>Significant formulation cost reduction<\/strong>: acting as a dense, economical bulk filler relative to pure resin volume, it drastically reduces the cost per kilo of polymerized mass without compromising structural quality.<\/li>\n<li><strong>High wetting and low resin absorption<\/strong>: Careful distribution of ultrafine and medium particles allows high filler loadings (between 68% and 75% by mass depending on resin type), maintaining optimal working viscosities suitable for filling complex molds.<\/li>\n<li><strong>Increased density and shear modulus<\/strong>: provides consistency and rigidity to gelcoated parts such as shower trays, washbasins, countertops and polymer concrete parts.<\/li>\n<li><strong>Excellent chemical inertness and thermal stability<\/strong>: its inert mineral nature does not interfere with peroxide or cobalt catalysis kinetics, ensuring stable gel times and uniform curing that minimizes internal stresses and prevents deformation in large-format parts.<\/li>\n<\/ul>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-d9a5b47 elementor-widget elementor-widget-heading\" data-id=\"d9a5b47\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">AITANACHEM: technical support and custom particle-size selection<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-8b9d545 elementor-widget elementor-widget-text-editor\" data-id=\"8b9d545\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p>In composite manufacturing, there is no universal dolomite particle size. <strong>An excessively fine filler can increase viscosity and require a higher percentage of resin; conversely, a particle that is too coarse can settle<\/strong> during gel time (sedimentation) or cause abrasion in pumps and continuous mixers.<\/p>\n<p><strong>At AITANA CHEMICALS we assess your production process rheology, machinery type ,and target gel time<\/strong> to recommend the ideal micronized dolomite grain size or to develop custom mineral blends. Rigorous particle size controls guarantee homogeneity, translating into: excellent resin dispersion, minimized styrene monomer demand, reduced resin absorption and optimal fluidity during injection or mold casting.<\/p>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-8047981 elementor-widget elementor-widget-heading\" data-id=\"8047981\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Frequently asked questions about dolomite as a mineral filler (FAQ)<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-3fa8b04 elementor-widget elementor-widget-accordion\" data-id=\"3fa8b04\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"accordion.default\">\n\t\t\t\t\t\t\t<div class=\"elementor-accordion\">\n\t\t\t\t\t\t\t<div class=\"elementor-accordion-item\">\n\t\t\t\t\t<h3 id=\"elementor-tab-title-6671\" class=\"elementor-tab-title\" data-tab=\"1\" role=\"button\" aria-controls=\"elementor-tab-content-6671\" aria-expanded=\"false\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-accordion-icon elementor-accordion-icon-left\" aria-hidden=\"true\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-accordion-icon-closed\"><svg class=\"e-font-icon-svg e-fas-plus\" viewBox=\"0 0 448 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M416 208H272V64c0-17.67-14.33-32-32-32h-32c-17.67 0-32 14.33-32 32v144H32c-17.67 0-32 14.33-32 32v32c0 17.67 14.33 32 32 32h144v144c0 17.67 14.33 32 32 32h32c17.67 0 32-14.33 32-32V304h144c17.67 0 32-14.33 32-32v-32c0-17.67-14.33-32-32-32z\"><\/path><\/svg><\/span>\n\t\t\t\t\t\t\t\t<span class=\"elementor-accordion-icon-opened\"><svg class=\"e-font-icon-svg e-fas-minus\" viewBox=\"0 0 448 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M416 208H32c-17.67 0-32 14.33-32 32v32c0 17.67 14.33 32 32 32h384c17.67 0 32-14.33 32-32v-32c0-17.67-14.33-32-32-32z\"><\/path><\/svg><\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t<a class=\"elementor-accordion-title\" tabindex=\"0\">What is the difference between calcium carbonate and dolomite in resin formulations?<\/a>\n\t\t\t\t\t<\/h3>\n\t\t\t\t\t<div id=\"elementor-tab-content-6671\" class=\"elementor-tab-content elementor-clearfix\" data-tab=\"1\" role=\"region\" aria-labelledby=\"elementor-tab-title-6671\"><p>Although both are carbonate minerals, dolomite contains magnesium (CaMg(CO\u2083)\u2082), which gives it higher hardness (3.5-4 Mohs versus 3 for calcite), greater acid resistance and a crystalline structure that usually allows a slight viscosity reduction at the same filler loading in the mixture.<\/p>\n<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t\t<div class=\"elementor-accordion-item\">\n\t\t\t\t\t<h3 id=\"elementor-tab-title-6672\" class=\"elementor-tab-title\" data-tab=\"2\" role=\"button\" aria-controls=\"elementor-tab-content-6672\" aria-expanded=\"false\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-accordion-icon elementor-accordion-icon-left\" aria-hidden=\"true\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-accordion-icon-closed\"><svg class=\"e-font-icon-svg e-fas-plus\" viewBox=\"0 0 448 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M416 208H272V64c0-17.67-14.33-32-32-32h-32c-17.67 0-32 14.33-32 32v144H32c-17.67 0-32 14.33-32 32v32c0 17.67 14.33 32 32 32h144v144c0 17.67 14.33 32 32 32h32c17.67 0 32-14.33 32-32V304h144c17.67 0 32-14.33 32-32v-32c0-17.67-14.33-32-32-32z\"><\/path><\/svg><\/span>\n\t\t\t\t\t\t\t\t<span class=\"elementor-accordion-icon-opened\"><svg class=\"e-font-icon-svg e-fas-minus\" viewBox=\"0 0 448 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M416 208H32c-17.67 0-32 14.33-32 32v32c0 17.67 14.33 32 32 32h384c17.67 0 32-14.33 32-32v-32c0-17.67-14.33-32-32-32z\"><\/path><\/svg><\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t<a class=\"elementor-accordion-title\" tabindex=\"0\">In what ratio is dolomite incorporated into polyester resin castings?<\/a>\n\t\t\t\t\t<\/h3>\n\t\t\t\t\t<div id=\"elementor-tab-content-6672\" class=\"elementor-tab-content elementor-clearfix\" data-tab=\"2\" role=\"region\" aria-labelledby=\"elementor-tab-title-6672\"><p>Depending on the reactivity and viscosity of the resin (orthophthalic, isophthalic or DCPD), typical dosages range between 65% and 75% by weight of the total mix. Our technical team advises you on reaching the target viscosity with a Ford cup or Brookfield viscometer.<\/p>\n<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t\t<div class=\"elementor-accordion-item\">\n\t\t\t\t\t<h3 id=\"elementor-tab-title-6673\" class=\"elementor-tab-title\" data-tab=\"3\" role=\"button\" aria-controls=\"elementor-tab-content-6673\" aria-expanded=\"false\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-accordion-icon elementor-accordion-icon-left\" aria-hidden=\"true\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-accordion-icon-closed\"><svg class=\"e-font-icon-svg e-fas-plus\" viewBox=\"0 0 448 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M416 208H272V64c0-17.67-14.33-32-32-32h-32c-17.67 0-32 14.33-32 32v144H32c-17.67 0-32 14.33-32 32v32c0 17.67 14.33 32 32 32h144v144c0 17.67 14.33 32 32 32h32c17.67 0 32-14.33 32-32V304h144c17.67 0 32-14.33 32-32v-32c0-17.67-14.33-32-32-32z\"><\/path><\/svg><\/span>\n\t\t\t\t\t\t\t\t<span class=\"elementor-accordion-icon-opened\"><svg class=\"e-font-icon-svg e-fas-minus\" viewBox=\"0 0 448 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M416 208H32c-17.67 0-32 14.33-32 32v32c0 17.67 14.33 32 32 32h384c17.67 0 32-14.33 32-32v-32c0-17.67-14.33-32-32-32z\"><\/path><\/svg><\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t<a class=\"elementor-accordion-title\" tabindex=\"0\">Does dolomite affect resin gel time or curing ?<\/a>\n\t\t\t\t\t<\/h3>\n\t\t\t\t\t<div id=\"elementor-tab-content-6673\" class=\"elementor-tab-content elementor-clearfix\" data-tab=\"3\" role=\"region\" aria-labelledby=\"elementor-tab-title-6673\"><p>High-purity dolomite is chemically inert and does not alter peroxide or cobalt accelerator catalysis. However, a non-dried dolomite with residual moisture can delay the reaction times or cause microbubbles; that is why our fillers are supplied with strictly controlled moisture levels.<\/p>\n<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t\t<div class=\"elementor-accordion-item\">\n\t\t\t\t\t<h3 id=\"elementor-tab-title-6674\" class=\"elementor-tab-title\" data-tab=\"4\" role=\"button\" aria-controls=\"elementor-tab-content-6674\" aria-expanded=\"false\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-accordion-icon elementor-accordion-icon-left\" aria-hidden=\"true\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-accordion-icon-closed\"><svg class=\"e-font-icon-svg e-fas-plus\" viewBox=\"0 0 448 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M416 208H272V64c0-17.67-14.33-32-32-32h-32c-17.67 0-32 14.33-32 32v144H32c-17.67 0-32 14.33-32 32v32c0 17.67 14.33 32 32 32h144v144c0 17.67 14.33 32 32 32h32c17.67 0 32-14.33 32-32V304h144c17.67 0 32-14.33 32-32v-32c0-17.67-14.33-32-32-32z\"><\/path><\/svg><\/span>\n\t\t\t\t\t\t\t\t<span class=\"elementor-accordion-icon-opened\"><svg class=\"e-font-icon-svg e-fas-minus\" viewBox=\"0 0 448 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M416 208H32c-17.67 0-32 14.33-32 32v32c0 17.67 14.33 32 32 32h384c17.67 0 32-14.33 32-32v-32c0-17.67-14.33-32-32-32z\"><\/path><\/svg><\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t<a class=\"elementor-accordion-title\" tabindex=\"0\">Is dolomite compatible with light weight filler (LWF) technology?<\/a>\n\t\t\t\t\t<\/h3>\n\t\t\t\t\t<div id=\"elementor-tab-content-6674\" class=\"elementor-tab-content elementor-clearfix\" data-tab=\"4\" role=\"region\" aria-labelledby=\"elementor-tab-title-6674\"><p>Yes, completely. In fact, in the concentrated versions of our <a href=\"https:\/\/aitanachem.com\/en\/mineral-fillers-for-composite\/light-weight-fillers\/\" target=\"_blank\" rel=\"noopener\"><strong><u>light weight filler (LWF)<\/u><\/strong><\/a> technology, manufacturers use local dolomite as a coarse mineral filler to complete the formulation, saving up to 50% on international transport costs.<\/p>\n<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t\t<div class=\"elementor-accordion-item\">\n\t\t\t\t\t<h3 id=\"elementor-tab-title-6675\" class=\"elementor-tab-title\" data-tab=\"5\" role=\"button\" aria-controls=\"elementor-tab-content-6675\" aria-expanded=\"false\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-accordion-icon elementor-accordion-icon-left\" aria-hidden=\"true\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-accordion-icon-closed\"><svg class=\"e-font-icon-svg e-fas-plus\" viewBox=\"0 0 448 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M416 208H272V64c0-17.67-14.33-32-32-32h-32c-17.67 0-32 14.33-32 32v144H32c-17.67 0-32 14.33-32 32v32c0 17.67 14.33 32 32 32h144v144c0 17.67 14.33 32 32 32h32c17.67 0 32-14.33 32-32V304h144c17.67 0 32-14.33 32-32v-32c0-17.67-14.33-32-32-32z\"><\/path><\/svg><\/span>\n\t\t\t\t\t\t\t\t<span class=\"elementor-accordion-icon-opened\"><svg class=\"e-font-icon-svg e-fas-minus\" viewBox=\"0 0 448 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M416 208H32c-17.67 0-32 14.33-32 32v32c0 17.67 14.33 32 32 32h384c17.67 0 32-14.33 32-32v-32c0-17.67-14.33-32-32-32z\"><\/path><\/svg><\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t<a class=\"elementor-accordion-title\" tabindex=\"0\">Which dolomite particle sizes do you offer?<\/a>\n\t\t\t\t\t<\/h3>\n\t\t\t\t\t<div id=\"elementor-tab-content-6675\" class=\"elementor-tab-content elementor-clearfix\" data-tab=\"5\" role=\"region\" aria-labelledby=\"elementor-tab-title-6675\"><p>We work across the entire range, from micronized powders (fillers) for composites to coarser particle distributions, selecting the most suitable option for each application.<\/p>\n<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t\t<script type=\"application\/ld+json\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@type\":\"FAQPage\",\"mainEntity\":[{\"@type\":\"Question\",\"name\":\"What is the difference between calcium carbonate and dolomite in resin formulations?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"<p>Although both are carbonate minerals, dolomite contains magnesium (CaMg(CO\\u2083)\\u2082), which gives it higher hardness (3.5-4 Mohs versus 3 for calcite), greater acid resistance and a crystalline structure that usually allows a slight viscosity reduction at the same filler loading in the mixture.<\\\/p>\\n\"}},{\"@type\":\"Question\",\"name\":\"In what ratio is dolomite incorporated into polyester resin castings?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"<p>Depending on the reactivity and viscosity of the resin (orthophthalic, isophthalic or DCPD), typical dosages range between 65% and 75% by weight of the total mix. Our technical team advises you on reaching the target viscosity with a Ford cup or Brookfield viscometer.<\\\/p>\\n\"}},{\"@type\":\"Question\",\"name\":\"Does dolomite affect resin gel time or curing ?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"<p>High-purity dolomite is chemically inert and does not alter peroxide or cobalt accelerator catalysis. However, a non-dried dolomite with residual moisture can delay the reaction times or cause microbubbles; that is why our fillers are supplied with strictly controlled moisture levels.<\\\/p>\\n\"}},{\"@type\":\"Question\",\"name\":\"Is dolomite compatible with light weight filler (LWF) technology?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"<p>Yes, completely. In fact, in the concentrated versions of our <a href=\\\"https:\\\/\\\/aitanachem.com\\\/en\\\/mineral-fillers-for-composite\\\/light-weight-fillers\\\/\\\" target=\\\"_blank\\\" rel=\\\"noopener\\\"><strong><u>light weight filler (LWF)<\\\/u><\\\/strong><\\\/a> technology, manufacturers use local dolomite as a coarse mineral filler to complete the formulation, saving up to 50% on international transport costs.<\\\/p>\\n\"}},{\"@type\":\"Question\",\"name\":\"Which dolomite particle sizes do you offer?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"<p>We work across the entire range, from micronized powders (fillers) for composites to coarser particle distributions, selecting the most suitable option for each application.<\\\/p>\\n\"}}]}<\/script>\n\t\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-2b5deaf elementor-widget elementor-widget-heading\" data-id=\"2b5deaf\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Looking to Optimize Your Resin Formulations with Dolomite Fillers?<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-399cd1e elementor-widget elementor-widget-text-editor\" data-id=\"399cd1e\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p>Our technical department is at your disposal to <strong>analyse your current mixes, send test samples of our micronized dolomites and design the particle-size adjustment according to your plant needs.<\/strong> For any inquiry about our dolomite fillers, <a href=\"https:\/\/aitanachem.com\/en\/contact\/\" target=\"_blank\" rel=\"noopener\"><strong><u>contact us<\/u>.<\/strong><\/a><\/p>\n<p>Dolomite is just one of the families in our range of mineral fillers for composites. If you wish to learn about the rest (light weight fillers, reinforcing fillers and aluminium trihydrate ATH) and how to select the right filler, consult our <a href=\"https:\/\/aitanachem.com\/en\/mineral-fillers-for-composite\/\" target=\"_blank\" rel=\"noopener\"><strong><u>complete guide to mineral fillers<\/u>.<\/strong><\/a><\/p>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-e8de51d elementor-share-buttons--skin-flat elementor-share-buttons--shape-rounded elementor-share-buttons--view-icon-text elementor-grid-0 elementor-share-buttons--color-official elementor-widget elementor-widget-global elementor-global-1083 elementor-global-350 elementor-widget-share-buttons\" data-id=\"e8de51d\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"share-buttons.default\">\n\t\t\t\t\t\t\t<div class=\"elementor-grid\" role=\"list\">\n\t\t\t\t\t\t\t\t<div class=\"elementor-grid-item\" role=\"listitem\">\n\t\t\t\t\t\t<div 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class=\"elementor-share-btn__title\">\n\t\t\t\t\t\t\t\t\t\tWhatsApp\t\t\t\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t<div class=\"elementor-grid-item\" role=\"listitem\">\n\t\t\t\t\t\t<div class=\"elementor-share-btn elementor-share-btn_email\" role=\"button\" tabindex=\"0\" aria-label=\"Share on email\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-share-btn__icon\">\n\t\t\t\t\t\t\t\t<svg aria-hidden=\"true\" class=\"e-font-icon-svg e-fas-envelope\" viewBox=\"0 0 512 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M502.3 190.8c3.9-3.1 9.7-.2 9.7 4.7V400c0 26.5-21.5 48-48 48H48c-26.5 0-48-21.5-48-48V195.6c0-5 5.7-7.8 9.7-4.7 22.4 17.4 52.1 39.5 154.1 113.6 21.1 15.4 56.7 47.8 92.2 47.6 35.7.3 72-32.8 92.3-47.6 102-74.1 131.6-96.3 154-113.7zM256 320c23.2.4 56.6-29.2 73.4-41.4 132.7-96.3 142.8-104.7 173.4-128.7 5.8-4.5 9.2-11.5 9.2-18.9v-19c0-26.5-21.5-48-48-48H48C21.5 64 0 85.5 0 112v19c0 7.4 3.4 14.3 9.2 18.9 30.6 23.9 40.7 32.4 173.4 128.7 16.8 12.2 50.2 41.8 73.4 41.4z\"><\/path><\/svg>\t\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"elementor-share-btn__text\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-share-btn__title\">\n\t\t\t\t\t\t\t\t\t\tEmail\t\t\t\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<\/div>\n\t\t","protected":false},"excerpt":{"rendered":"<p>Twitter Share Pin WhatsApp Email Dolomite is one of the most widely used mineral fillers in the manufacture of polymer-matrix composites, paints, plastics, rubbers and many other industrial sectors. Dolomite fillers help us optimize formulation cost, improve mold flow and increase density in sanitaryware and industrial castings. At AITANACHEM we supply one of the highest-whiteness, [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":816,"menu_order":2,"comment_status":"closed","ping_status":"closed","template":"elementor_header_footer","meta":{"site-sidebar-layout":"no-sidebar","site-content-layout":"plain-container","ast-site-content-layout":"normal-width-container","site-content-style":"unboxed","site-sidebar-style":"unboxed","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"disabled","ast-breadcrumbs-content":"","ast-featured-img":"disabled","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"default","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"set","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"class_list":["post-820","page","type-page","status-publish","hentry"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v28.2 (Yoast SEO v28.2) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>Dolomite filler: what it is, properties &amp; uses | AITANACHEM<\/title>\n<meta name=\"description\" content=\"High-purity micronized dolomite fillers for polyester resins and cast sanitaryware. 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