{"id":37,"count":9,"description":"<p>Material Wizard is a Ukrainian distributor of SBS rubbers from three production sites in China and the manufacturer of <strong>its own trademark Exaflex<sup>\u00ae<\/sup> SBS<\/strong> (Derazhnia, Khmelnytskyi region). We supply styrene-butadiene-styrene block copolymers for the production of polymer-modified bitumen (PMB), bitumen-polymer roll materials, road sealants, hot-melt adhesives and polyolefin modification. All products are shipped with a batch certificate of analysis (CoA) and comply with <a href=\"https:\/\/online.budstandart.com\/ua\/catalog\/doc-page.html?id_doc=105146\">DSTU EN 14023:2023<\/a> (PMB framework specification, IDT with EN 14023:2010) and <a href=\"https:\/\/online.budstandart.com\/ua\/catalog\/doc-page.html?id_doc=65018\">DSTU B V.2.7-135:2014<\/a> (road polymer-modified bitumen).<\/p>\r\n\r\n<h2>What is an SBS bitumen modifier<\/h2>\r\n\r\n<p>Styrene-butadiene-styrene (SBS) is a <em>thermoplastic elastomer<\/em> whose molecular structure connects polystyrene blocks (hard phase) with a polybutadiene block (elastomeric phase). In bitumen, the polystyrene domains form a physical crosslinking network without chemical vulcanization \u2014 this increases the cohesion, softening point, elastic recovery and rutting resistance of the finished binder. Unlike SBR\/NR-based rubbers, SBS requires no vulcanization and is processed on standard hot-mix equipment for blending with bitumen.<\/p>\r\n\r\n<p>Under EN 14023, SBS modification <strong>provides elastic recovery of \u2265 60 %<\/strong> in the finished PMB \u2014 the key marker of quality modification, unattainable with EVA, APP and most plastomeric additives.<\/p>\r\n\r\n<h2>PMB classes under EN 14023 \/ DSTU EN 14023:2023<\/h2>\r\n\r\n<p>The standard classifies polymer-modified bitumens by <strong>penetration at 25 \u00b0C<\/strong> and <strong>minimum softening point (Ring and Ball)<\/strong>. There are 15 classes in total. The most common on the Ukrainian market:<\/p>\r\n\r\n<table>\r\n<thead>\r\n<tr><th scope=\"col\">PMB class (EN 14023)<\/th><th scope=\"col\">Penetration at 25 \u00b0C, 0,1 mm<\/th><th scope=\"col\">T<sub>soft<\/sub>, \u00b0C min.<\/th><th scope=\"col\">Typical application<\/th><\/tr>\r\n<\/thead>\r\n<tbody>\r\n<tr><td>PMB 10\/40-65<\/td><td>10\u201340<\/td><td>65<\/td><td>Stiff pavements, bridges, tunnels, airfields<\/td><\/tr>\r\n<tr><td>PMB 25\/55-55<\/td><td>25\u201355<\/td><td>55<\/td><td>Category I highways, thin-layer pavements<\/td><\/tr>\r\n<tr><td>PMB 25\/55-65<\/td><td>25\u201355<\/td><td>65<\/td><td>SMA mixes, wearing courses<\/td><\/tr>\r\n<tr><td>PMB 45\/80-55<\/td><td>45\u201380<\/td><td>55<\/td><td>General-purpose pavements, category II\u2013III roads<\/td><\/tr>\r\n<tr><td>PMB 45\/80-65<\/td><td>45\u201380<\/td><td>65<\/td><td>The most popular class \u2014 dense and porous asphalt concrete<\/td><\/tr>\r\n<tr><td>PMB 75\/130-65<\/td><td>75\u2013130<\/td><td>65<\/td><td>Cold climate zones, binder for layered paving<\/td><\/tr>\r\n<\/tbody>\r\n<\/table>\r\n\r\n<p>All classes require testing of <strong>elastic recovery<\/strong> (EN 13398), <strong>storage stability<\/strong> (EN 13399, \u0394 T<sub>soft<\/sub> \u2264 5 \u00b0C over 72 h at 180 \u00b0C), <strong>Fraass breaking point<\/strong> (EN 12593) and <strong>cohesion<\/strong> (EN 13589 \/ EN 13703).<\/p>\r\n\r\n<h2>Linear SBS vs radial SBS \u2014 which to choose for PMB<\/h2>\r\n\r\n<p>The architecture of the macromolecule fundamentally affects how SBS behaves in bitumen. A brief comparison matrix:<\/p>\r\n\r\n<table>\r\n<thead>\r\n<tr><th scope=\"col\">Parameter<\/th><th scope=\"col\">Linear SBS (S-B-S)<\/th><th scope=\"col\">Radial SBS (star-shaped)<\/th><\/tr>\r\n<\/thead>\r\n<tbody>\r\n<tr><td>Molecular weight<\/td><td>120 000 \u2013 200 000 g\/mol<\/td><td>250 000 \u2013 500 000 g\/mol<\/td><\/tr>\r\n<tr><td>Compatibility with bitumen<\/td><td>High (finer dispersion)<\/td><td>Lower (coarser particles)<\/td><\/tr>\r\n<tr><td>Swelling rate in bitumen<\/td><td>High (30\u201345 min on a high shear mill)<\/td><td>Moderate (60\u201390 min)<\/td><\/tr>\r\n<tr><td>Storage stability<\/td><td>Better<\/td><td>Worse \u2014 requires stabilizers<\/td><\/tr>\r\n<tr><td>PMB viscosity at 135 \u00b0C<\/td><td>Moderate \u2014 suitable for typical asphalt plants<\/td><td>High \u2014 risk of compaction difficulties<\/td><\/tr>\r\n<tr><td>Modulus and rutting resistance<\/td><td>High<\/td><td>Very high<\/td><\/tr>\r\n<tr><td>Target classes<\/td><td>PMB 45\/80-65, 25\/55-65, 75\/130-65<\/td><td>PMB 10\/40-65, special applications<\/td><\/tr>\r\n<\/tbody>\r\n<\/table>\r\n\r\n<p><strong>Conclusion:<\/strong> for typical Ukrainian road bitumens (BND 50\/70, BND 70\/100) and most PMB classes, linear SBS is the optimal choice. Radial SBS is used selectively \u2014 where maximum rutting resistance is required (airfield slabs, bridges).<\/p>\r\n\r\n<h2>In-house production: Exaflex<sup>\u00ae<\/sup> SBS 7090<\/h2>\r\n\r\n<p><strong>Exaflex<sup>\u00ae<\/sup> SBS 7090<\/strong> is the flagship of Material Wizard's own trademark. A linear block copolymer with a nominal butadiene\/styrene ratio of \u2248 70\/30, designed specifically for PMB applications. Key characteristics:<\/p>\r\n\r\n<ul>\r\n<li>Bound styrene: 30 \u00b1 2 wt%<\/li>\r\n<li>Tensile strength: \u2265 16 MPa (ISO 37)<\/li>\r\n<li>Elongation at break: \u2265 800 % (ISO 37)<\/li>\r\n<li>Hardness: 68\u201372 Shore A (ISO 868)<\/li>\r\n<li>MFR (200 \u00b0C \/ 5 kg): 0,1\u20130,5 g\/10 min (ISO 1133)<\/li>\r\n<li>Residual volatiles: \u2264 0,7 wt%<\/li>\r\n<li>Architecture: linear (S-B-S)<\/li>\r\n<li>Supply form: porous pellets, 25 kg bags, EUR pallets of 1000\u20131100 kg<\/li>\r\n<\/ul>\r\n\r\n<p>Exaflex<sup>\u00ae<\/sup> SBS 7090 produces PMB of classes 25\/55-55, 45\/80-65 and 75\/130-65 (per EN 14023) at dosages of 3,0\u20136,0 wt% on a BND 50\/70 or BND 70\/100 base bitumen. The full TDS, high shear mill mixing regimes and target properties of the finished binder are available on the <a href=\"\/exaflex-sbs-7090\/\">Exaflex<sup>\u00ae<\/sup> SBS 7090 product page<\/a>.<\/p>\r\n\r\n<h2>How SBS is incorporated into bitumen (high shear mill)<\/h2>\r\n\r\n<p>PMB quality is 60 % determined by the mixing technology, not just by the SBS grade. The standard industrial procedure:<\/p>\r\n\r\n<ol>\r\n<li><strong>Heat the base bitumen<\/strong> to 175\u2013185 \u00b0C with continuous stirring.<\/li>\r\n<li><strong>Feed the SBS<\/strong> through a doser at a rate matched to the mill throughput.<\/li>\r\n<li><strong>High-shear dispersion<\/strong> on a colloid mill (high shear mill, 4 000\u20136 000 rpm) for 25\u201345 min until the SBS particle size is \u2264 5 \u00b5m. Control \u2014 fluorescence microscopy.<\/li>\r\n<li><strong>Digestion<\/strong> for 1,5\u20133 h at 175\u2013185 \u00b0C with low-speed stirring \u2014 for complete swelling of the SBS in the maltene phase of the bitumen.<\/li>\r\n<li><strong>Stabilization<\/strong> (if required) \u2014 adding a reactive stabilizer: 105 % phosphoric acid (0,5\u20131,5 wt% of SBS) or elemental sulfur (0,05\u20130,15 wt% of PMB).<\/li>\r\n<li><strong>Laboratory control<\/strong>: penetration (EN 1426), T<sub>soft<\/sub> (EN 1427), elastic recovery (EN 13398, \u2265 60 %), storage stability (EN 13399, \u0394 T<sub>soft<\/sub> \u2264 5 \u00b0C after 72 h at 180 \u00b0C), Fraass breaking point (EN 12593).<\/li>\r\n<\/ol>\r\n\r\n<p>Failure to follow the procedure at any stage (especially insufficient dispersion) leads to SBS phase segregation in the storage tank and loss of modification within 24\u201372 h.<\/p>\r\n\r\n<h2>Logistics and supply volumes<\/h2>\r\n\r\n<p>Supply from the warehouse in Derazhnia (Khmelnytskyi region) is palletized \u2014 FCA Derazhnia or delivered across Ukraine by our own transport. Minimum lot \u2014 1 pallet (1 000 kg). Standard full-truck lot \u2014 20 tonnes. For large PMB producers we offer <strong>contract supply<\/strong> with a quarterly schedule and fixed pricing. In-house production of Exaflex<sup>\u00ae<\/sup> SBS 7090 is additional insurance against import market fluctuations and currency risks.<\/p>\r\n\r\n<p>To request a commercial offer, a batch certificate of analysis, samples (1\u20135 kg) or technical advice on selecting an SBS for your base bitumen, call <a href=\"tel:+380503232321\">+38 050 323-23-21<\/a> or write to <a href=\"mailto:yyekimov@gmail.com\">yyekimov@gmail.com<\/a>.\r\n\r\n<h2>Questions and answers \u2014 for polymer-modified bitumen producers<\/h2>\r\n\r\n<dl class=\"mw-faq\">\r\n\r\n<dt>Which SBS should I choose for PMB 45\/80-65?<\/dt>\r\n<dd>The most popular class on the Ukrainian market. The optimal choice is a <strong>linear SBS with ~30 % styrene content<\/strong>. On a BND 70\/100 base, a dosage of 3,5\u20134,5 wt% gives a T<sub>soft<\/sub> of 65\u201372 \u00b0C and elastic recovery of \u2265 75 %. Suitable grades: <a href=\"\/exaflex-sbs-7090\/\">Exaflex<sup>\u00ae<\/sup> SBS 7090<\/a>, <a href=\"\/sbs-kraton-d1101\/\">Kraton<sup>\u00ae<\/sup> D1101<\/a>, <a href=\"\/sbs-en-chuan-701-s\/\">EN CHUAN 701 S<\/a>, <a href=\"\/sbs-globalprene-3710\/\">Globalprene 3710<\/a>. Radial SBS grades are excessive in viscosity for 45\/80-65.<\/dd>\r\n\r\n<dt>How does linear SBS differ from radial SBS?<\/dt>\r\n<dd>Linear SBS (S-B-S) has a molecular weight of 120\u2013200 thousand g\/mol \u2014 it is more compatible with bitumen, disperses in 30\u201345 min on a high shear mill and gives a stable PMB under typical storage conditions. Radial (star-shaped) SBS has 250\u2013500 thousand g\/mol \u2014 coarser particles and a higher modulus of the finished binder, but it needs longer mixing, segregates more often and gives higher PMB viscosity at 135 \u00b0C. Radial SBS is used selectively \u2014 for very stiff pavements (PMB 10\/40-65), airfields and bridges.<\/dd>\r\n\r\n<dt>How much SBS should be added to BND 70\/100 bitumen?<\/dt>\r\n<dd>It depends on the target PMB class:\r\n<ul>\r\n<li>PMB 45\/80-65 \u2014 3,0\u20134,0 wt% SBS<\/li>\r\n<li>PMB 25\/55-65 \u2014 4,0\u20135,0 wt% SBS<\/li>\r\n<li>PMB 25\/55-75 \u2014 5,5\u20136,5 wt% SBS<\/li>\r\n<\/ul>\r\nExceeding 7 % leads to a sharp rise in viscosity, complicates asphalt compaction and increases cost with only a small gain in T<sub>soft<\/sub>. Fine-tuning this balance requires laboratory trials.<\/dd>\r\n\r\n<dt>How can SBS phase segregation in the finished PMB be avoided?<\/dt>\r\n<dd>Four key factors: (1) choose a linear SBS rather than a radial one; (2) perform full dispersion on a high shear mill down to a particle size of \u2264 5 \u00b5m; (3) allow digestion for 1,5\u20133 h at 175\u2013185 \u00b0C; (4) add a reactive stabilizer \u2014 105 % phosphoric acid (0,5\u20131,5 wt% of SBS) or elemental sulfur (0,05\u20130,15 wt% of PMB mass). Control \u2014 the EN 13399 test: the difference in T<sub>soft<\/sub> between the top and bottom of the tube after 72 h at 180 \u00b0C must not exceed 5 \u00b0C.<\/dd>\r\n\r\n<dt>Can SBS be purchased in lots smaller than 1 tonne?<\/dt>\r\n<dd>Yes. The minimum order lot of Exaflex<sup>\u00ae<\/sup> SBS 7090 is 1 pallet (1 000 kg, 40 bags of 25 kg). For pilot trials and laboratory development we provide <strong>1\u20135 kg samples<\/strong> free of charge (logistics paid by the customer). For imported brands (Kraton, Kumho, Globalprene) the minimum lot may vary \u2014 please check when enquiring.<\/dd>\r\n\r\n<dt>Does Exaflex<sup>\u00ae<\/sup> SBS 7090 comply with DSTU EN 14023:2023 and DSTU B V.2.7-135:2014?<\/dt>\r\n<dd>Exaflex<sup>\u00ae<\/sup> SBS 7090 is a <em>raw material<\/em> (a polymer modifier), while DSTU EN 14023:2023 and DSTU B V.2.7-135:2014 regulate the <em>finished PMB<\/em>. The correct wording is therefore: <strong>Exaflex<sup>\u00ae<\/sup> SBS 7090 makes it possible to produce PMB that meets the requirements of both standards<\/strong>, provided the process procedure is followed and a base bitumen of proper quality is used. Every batch is accompanied by a certificate of analysis (CoA) covering all parameters that affect certification of the finished binder.<\/dd>\r\n\r\n<dt>What are the mixing regimes for Exaflex<sup>\u00ae<\/sup> SBS 7090 with bitumen?<\/dt>\r\n<dd>Standard procedure: heat the bitumen to 175\u2013185 \u00b0C, feed the SBS through a doser, disperse on a high shear mill for 25\u201345 min (4 000\u20136 000 rpm) to a particle size of \u2264 5 \u00b5m, then digest for 1,5\u20133 h at 175\u2013185 \u00b0C with low-speed stirring. Temperatures above 190 \u00b0C are not recommended \u2014 thermo-oxidative degradation of the SBS begins.<\/dd>\r\n\r\n<dt>Which is better for PMB production: SBS pellets or powder?<\/dt>\r\n<dd>For industrial plants with a high shear mill, <strong>pellets<\/strong> are better: better flowability, more accurate dosing, lower risk of dusting and self-ignition. SBS powder may dissolve faster, but it requires closed feeding systems due to the dust formation risk. Exaflex<sup>\u00ae<\/sup> SBS 7090 is supplied as porous pellets with a process dusting agent \u2014 the optimal form for most asphalt plants.<\/dd>\r\n\r\n<dt>What is the difference between SBS and EVA bitumen modifiers?<\/dt>\r\n<dd>SBS is an elastomer: it provides <strong>elastic (recoverable) deformation<\/strong> and high elastic recovery (\u2265 60 % per EN 13398). It suits cold and temperate climates, with high crack resistance and fatigue resistance. EVA (ethylene-vinyl acetate) is a plastomer: it deforms plastically (irreversibly), offers better rutting resistance in hot weather, but performs worse at low temperatures. SBS is the standard for Ukrainian highways; EVA is used selectively in hot climates (southern Ukraine, airfields).<\/dd>\r\n\r\n<dt>Is anything else needed in a PMB formulation besides SBS?<\/dt>\r\n<dd>Often, yes. In addition to the SBS itself, formulations use: <em>(a)<\/em> reactive compatibility stabilizers \u2014 105 % phosphoric acid or elemental sulfur; <em>(b)<\/em> adhesion promoters (surfactants, amines) \u2014 to improve bonding to the aggregate; <em>(c)<\/em> antioxidants \u2014 for thermal stability of the PMB during storage. Formulation development is an individual task for each bitumen + SBS pair. Our laboratory helps partners through this stage.<\/dd>\r\n\r\n<dt>How can I verify that the produced PMB meets the declared class?<\/dt>\r\n<dd>Mandatory laboratory control under EN 14023 \/ DSTU EN 14023:2023:\r\n<ul>\r\n<li>Penetration at 25 \u00b0C (EN 1426) \u2014 within the class range<\/li>\r\n<li>Ring and Ball softening point (EN 1427) \u2014 \u2265 the class minimum<\/li>\r\n<li>Elastic recovery at 25 \u00b0C (EN 13398) \u2014 \u2265 60 % for SBS-PMB<\/li>\r\n<li>Storage stability (EN 13399) \u2014 \u0394 T<sub>soft<\/sub> \u2264 5 \u00b0C after 72 h at 180 \u00b0C<\/li>\r\n<li>Fraass breaking point (EN 12593) \u2014 for cold climates<\/li>\r\n<li>Cohesion (EN 13589 \u2014 force ductility method, or EN 13703 \u2014 pendulum)<\/li>\r\n<\/ul>\r\nWithout these tests, a declared PMB class is not credible.<\/dd>\r\n\r\n<dt>How long does delivery of Exaflex<sup>\u00ae<\/sup> SBS 7090 take?<\/dt>\r\n<dd>From the warehouse in Derazhnia: typically 1\u20133 business days across Ukraine (a 20-tonne truck or a 1 000 kg pallet). For regular PMB producers we offer <strong>quarterly contracts with fixed pricing<\/strong> and volume reservation \u2014 this minimizes currency risk and guarantees availability in season. Enquiries: <a href=\"tel:+380503232321\">+38 050 323-23-21<\/a> or <a href=\"mailto:yyekimov@gmail.com\">yyekimov@gmail.com<\/a>.<\/dd>\r\n\r\n<\/dl>","link":"https:\/\/materialwizard.com.ua\/en\/category\/modifiers\/bitumen-modifiers\/","name":"Bitumen modifiers","slug":"bitumen-modifiers","taxonomy":"category","parent":10,"meta":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.7 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>SBS Bitumen Modifier, Exaflex\u00ae SBS 7090 for Road PMB | MW<\/title>\n<meta name=\"description\" content=\"SBS bitumen modifiers: Kraton, Kumho, EN CHUAN, Globalprene and our own Exaflex\u00ae SBS 7090. Meets EN 14023, DSTU B V.2.7-135:2014. 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