{"id":4217,"date":"2026-04-23T22:24:59","date_gmt":"2026-04-23T14:24:59","guid":{"rendered":"https:\/\/sanezenrubber.com\/?p=4217"},"modified":"2026-04-23T22:24:59","modified_gmt":"2026-04-23T14:24:59","slug":"application-analysis-of-greenthinking-fr99rp-highperformance-ecofriendly-flame-retardant-in-rubber","status":"publish","type":"post","link":"https:\/\/sanezenrubber.com\/ru\/technical-communication\/application-analysis-of-greenthinking-fr99rp-highperformance-ecofriendly-flame-retardant-in-rubber\/4217\/","title":{"rendered":"Application Analysis of GreenThinking\u00ae FR99RP HighPerformance EcoFriendly Flame Retardant in Rubber"},"content":{"rendered":"<p class=\"wp-block-paragraph\">With the rapid advancement of rail transit, automotive electronics, and renewable energy sectors, the market imposes unprecedented stringent requirements on the flame retardancy, environmental compliance, and physical properties of rubber products. Traditional halogenated flame retardants are either phased out due to environmental concerns or struggle to meet high-end applications due to adverse effects on crosslink density and mechanical performance. As leading&nbsp;<a href=\"https:\/\/sanezenrubber.com\/ru\/product\/\"><strong><u><strong>\u0411\u0435\u0437\u0433\u0430\u043b\u043e\u0433\u0435\u043d\u043d\u044b\u0435 \u043e\u0433\u043d\u0435\u0437\u0430\u0449\u0438\u0442\u043d\u044b\u0435 \u0441\u0440\u0435\u0434\u0441\u0442\u0432\u0430 \u041f\u0440\u043e\u0438\u0437\u0432\u043e\u0434\u0438\u0442\u0435\u043b\u0438 \u041a\u0438\u0442\u0430\u0439<\/strong><\/u><\/strong><\/a>&nbsp;\u0438 \u043d\u0430\u0434\u0435\u0436\u043d\u044b\u0439&nbsp;<a href=\"https:\/\/sanezenrubber.com\/ru\/product\/\"><strong><u><strong>Halogen free environmentally friendly flame retardant Suppliers China<\/strong><\/u><\/strong><\/a>, SaneZen Group introduces GreenThinking\u00ae FR99RP. This product is a&nbsp;<a href=\"https:\/\/sanezenrubber.com\/ru\/product\/\"><strong><u><strong>High Efficiency Flame Retardant<\/strong><\/u><\/strong><\/a>&nbsp;and a synergistic phosphorus-nitrogen system that perfectly balances high flame retardant efficiency (UL94 V-0) with superior physical properties through unique surface treatment technology. It is an&nbsp;<a href=\"https:\/\/sanezenrubber.com\/ru\/product\/\"><strong><u><strong>EPDM V0 Fire Retardant&nbsp;<\/strong><\/u><\/strong><strong><u><strong>with<\/strong><\/u><\/strong><strong><u><strong>&nbsp;RoHS Compliant Fire Retardant<\/strong><\/u><\/strong><\/a>&nbsp;developed specifically for the next generation of high-performance rubber goods. This paper delves into the flame retardant mechanism of FR99RP and demonstrates its significant advantages over the conventional product FR98RP in processability, mechanical strength, and heat aging resistance, supported by comprehensive data from EPDM and NBR base formulations.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<p class=\"wp-block-paragraph\">1. Product Overview and Design Philosophy<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">GreenThinking\u00ae FR99RP&nbsp;is a specialized high-efficiency compounded flame retardant developed by SaneZen Group for highly filled, flame-retardant rubber systems. Produced in our dedicated&nbsp;<a href=\"https:\/\/sanezenrubber.com\/ru\/product\/\"><strong><u><strong>Halogen free flame retardant Factory<\/strong><\/u><\/strong><\/a>, this material features a platelet structure with surface treatment, high specific surface area (BET), low impurity content, and excellent chemical stability. As a recognized&nbsp;<a href=\"https:\/\/sanezenrubber.com\/ru\/product\/\"><strong><u><strong>China manufacturer eco friendly rubber flame retardant<\/strong><\/u><\/strong><\/a>, we ensure this product strictly complies with EU RoHS 2.0 and WEEE directives, containing&nbsp;no polybrominated biphenyls (PBBs), polybrominated diphenyl ethers (PBDEs), chlorine, fluorine, or antimony trioxide. FR99RP serves as a<a href=\"https:\/\/sanezenrubber.com\/ru\/product\/\"><u>&nbsp;<\/u><strong><u><strong>V0 flame retardant additive without antimony trioxide<\/strong><\/u><\/strong><\/a>, which not only addresses dripping and flame spread issues during combustion but specifically tackles the common pain point of &#8220;precipitous decline in mechanical properties&#8221; associated with high loadings of flame retardant fillers. The design goal of FR99RP is to confer V-0 flame retardancy while&nbsp;maximizing, and even enhancing, the tensile strength, resilience, and compression set resistance of the vulcanizate. It stands out among offerings from&nbsp;<a href=\"https:\/\/sanezenrubber.com\/ru\/product\/\"><strong><u><strong>\u041f\u0440\u043e\u0438\u0437\u0432\u043e\u0434\u0438\u0442\u0435\u043b\u0438 \u043e\u0433\u043d\u0435\u0437\u0430\u0449\u0438\u0442\u043d\u044b\u0445 \u0441\u0440\u0435\u0434\u0441\u0442\u0432 \u0431\u0435\u0437 \u0433\u0430\u043b\u043e\u0433\u0435\u043d\u043e\u0432<\/strong><\/u><\/strong><u>&nbsp;\u0438&nbsp;<\/u><strong><u><strong>\u044d\u043a\u043e\u043b\u043e\u0433\u0438\u0447\u0435\u0441\u043a\u0438 \u0447\u0438\u0441\u0442\u044b\u0445 \u0431\u0435\u0441\u0433\u0430\u043b\u043e\u0433\u0435\u043d\u043d\u044b\u0445 \u043e\u0433\u043d\u0435\u0437\u0430\u0449\u0438\u0442\u043d\u044b\u0445 \u0441\u0440\u0435\u0434\u0441\u0442\u0432 \u043e\u0442 \u043f\u043e\u0441\u0442\u0430\u0432\u0449\u0438\u043a\u043e\u0432<\/strong><\/u><\/strong><\/a>&nbsp;due to this unique property retention.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">2. In-Depth Flame Retardant Mechanism<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The flame retardant action of FR99RP is a synergistic physicochemical process involving both condensed and gas phases, primarily in three stages. As a&nbsp;Phosphorus nitrogen based intumescent flame retardant supplier, SaneZen has optimized FR99RP for these precise mechanisms:<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>Formation of a Thermal Barrier (Condensed Phase):<br>Upon heating or combustion of the rubber matrix, FR99RP decomposes and expands rapidly on the surface, forming a dense, ceramic-like, intumescent char barrier. This layer effectively insulates oxygen diffusion to the combustion zone and inhibits heat feedback to the underlying substrate, as well as the escape of flammable small molecules.<\/li>\n\n\n\n<li>Free Radical Scavenging and Chain Reaction Termination (Gas Phase):<br>During thermal decomposition, FR99RP releases specific phosphorus-containing free radicals. These radicals efficiently capture the highly reactive H\u00b7 and OH\u00b7 radicals that propagate the combustion chain reaction, thereby terminating the cycle and promoting self-extinguishment.<\/li>\n\n\n\n<li>Endothermic and Dilution Effects:<br>The decomposition process is endothermic and simultaneously releases non-combustible gases (e.g., water vapor, carbon dioxide). This dilutes the concentration of flammable gases in the flame zone and absorbs substantial heat, further cooling the substrate surface.<\/li>\n<\/ol>\n\n\n\n<p class=\"wp-block-paragraph\">3. Recommended Applications<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">FR99RP is particularly well-suited for flame-retardant rubber products requiring&nbsp;smooth surface finish, relatively low specific gravity, high resilience, and excellent dimensional stability, including but not limited to:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Rail Transit:\u00a0Serving as a\u00a0Low smoke zero halogen flame retardant for railway parts, it is ideal for flame-retardant sealing profiles, floor compounds, and anti-vibration pads for subways and high-speed trains.<\/li>\n\n\n\n<li>Electronics &amp; Electrical:\u00a0Wire and cable jackets, insulation layers, and appliance gaskets. In NBR-based compounds, it functions as a\u00a0<a href=\"https:\/\/sanezenrubber.com\/ru\/product\/\"><strong><u><strong>High efficiency flame retardant for NBR cable compound<\/strong><\/u><\/strong><\/a>.<\/li>\n\n\n\n<li>Automotive Industry:\u00a0Seals for new energy vehicle battery packs, oil-resistant flame-retardant hoses.<\/li>\n\n\n\n<li>Mining &amp; Petroleum:\u00a0Antistatic and flame-retardant conveyor belts, sealing components.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Compatible Polymers:&nbsp;EPDM, NBR, CR (Neoprene), NR, SBR, IIR, ACM, etc. For CR applications, it is an effective&nbsp;<a href=\"https:\/\/sanezenrubber.com\/ru\/product\/\"><strong><u><strong>Flame retardant for CR rubber with good physical properties<\/strong><\/u><\/strong><\/a>. In silicone systems, it is recognized as a&nbsp;Non toxic odorless flame retardant for silicone rubber.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">4. Core Performance Data Comparison: FR99RP vs. FR98RP<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">To objectively assess the advantages of FR99RP as a&nbsp;<a href=\"https:\/\/sanezenrubber.com\/ru\/product\/\"><strong><u><strong>Halogen free flame retardant for EPDM rubber<\/strong><\/u><\/strong><\/a>&nbsp;and other polymers, comparative tests were conducted in a standard&nbsp;EPDM 70 Shore A&nbsp;black formulation using 80 phr and 100 phr loadings of FR99RP versus the previous generation product FR98RP. This testing validates FR99RP as a&nbsp;UL94 V0 certified EPDM compound flame retardant.<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><tbody><tr><td>Material Name<\/td><td>Basic Parts (phr)<\/td><\/tr><tr><td>KEP350<\/td><td>50<\/td><\/tr><tr><td>TER 4038<\/td><td>50<\/td><\/tr><tr><td>CZ500R<\/td><td>40<\/td><\/tr><tr><td>Precipitated Calcium Carbonate<\/td><td>20<\/td><\/tr><tr><td>Flame Retardant (FR98 \/ FR99)<\/td><td>80 \/ 100<\/td><\/tr><tr><td>Paraffin Oil 6030#<\/td><td>15<\/td><\/tr><tr><td>ZnO<\/td><td>6<\/td><\/tr><tr><td>STA<\/td><td>1.5<\/td><\/tr><tr><td>\u041f\u042d\u04134000<\/td><td>2<\/td><\/tr><tr><td>L-24<\/td><td>1<\/td><\/tr><tr><td>S-80<\/td><td>1.25<\/td><\/tr><tr><td>EP-33<\/td><td>2.5<br><\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<figure class=\"wp-block-image aligncenter size-full\"><img fetchpriority=\"high\" decoding=\"async\" width=\"554\" height=\"433\" src=\"https:\/\/sanezenrubber.com\/wp-content\/uploads\/2026\/04\/1-6.png\" alt=\" Comparative data chart and table showing FR99RP vs. FR98RP in EPDM 70 Shore A formulation. Data highlights FR99RP's superior tensile strength, higher MH-ML torque delta, and better resilience. It also demonstrates lower hardness change after 100\u00b0C x 70h heat aging\" class=\"wp-image-4218\" srcset=\"https:\/\/sanezenrubber.com\/wp-content\/uploads\/2026\/04\/1-6.png 554w, https:\/\/sanezenrubber.com\/wp-content\/uploads\/2026\/04\/1-6-300x234.png 300w, https:\/\/sanezenrubber.com\/wp-content\/uploads\/2026\/04\/1-6-15x12.png 15w, https:\/\/sanezenrubber.com\/wp-content\/uploads\/2026\/04\/1-6-500x391.png 500w\" sizes=\"(max-width: 554px) 100vw, 554px\" \/><\/figure>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><tbody><tr><td>\u041f\u0440\u0435\u0434\u043c\u0435\u0442 \u0438\u0441\u043f\u044b\u0442\u0430\u043d\u0438\u044f<\/td><td>\u0415\u0434\u0438\u043d\u0438\u0446\u0430<\/td><td>FR98RP-80<\/td><td>FR99RP-80<\/td><td>FR98RP-100<\/td><td>FR99RP-100<\/td><\/tr><tr><td>Rheometer Test (180\u2103\u00d75min)<\/td><td>&nbsp;<\/td><td>&nbsp;<\/td><td>&nbsp;<\/td><td>&nbsp;<\/td><td>&nbsp;<\/td><\/tr><tr><td>Minimum Torque ML<\/td><td>lbf-in<\/td><td>0.92<\/td><td>0.91<\/td><td>1.09<\/td><td>1.04<\/td><\/tr><tr><td>Maximum Torque MH<\/td><td>lbf-in<\/td><td>11.18<\/td><td><strong>12.55<\/strong><\/td><td>11.27<\/td><td><strong>14.62<\/strong><\/td><\/tr><tr><td>Torque Delta MH-ML<\/td><td>lbf-in<\/td><td>10.26<\/td><td><strong>11.65<\/strong><\/td><td>10.18<\/td><td><strong>13.58<\/strong><\/td><\/tr><tr><td>Optimum Cure Time TC90<\/td><td>sec<\/td><td>207<\/td><td><strong>96<\/strong><\/td><td>221<\/td><td><strong>112<\/strong><\/td><\/tr><tr><td>Physical Properties (175\u2103\u00d76min)<\/td><td>&nbsp;<\/td><td>&nbsp;<\/td><td>&nbsp;<\/td><td>&nbsp;<\/td><td>&nbsp;<\/td><\/tr><tr><td>\u0422\u0432\u0435\u0440\u0434\u043e\u0441\u0442\u044c<\/td><td>\u0411\u0435\u0440\u0435\u0433 \u0410<\/td><td>74<\/td><td>74<\/td><td>78<\/td><td>76<\/td><\/tr><tr><td>\u041f\u0440\u043e\u0447\u043d\u043e\u0441\u0442\u044c \u043d\u0430 \u0440\u0430\u0437\u0440\u044b\u0432<\/td><td>\u041c\u041f\u0430<\/td><td>7.63<\/td><td><strong>9.26<\/strong><\/td><td>6.35<\/td><td><strong>9.32<\/strong><\/td><\/tr><tr><td>\u0423\u0434\u043b\u0438\u043d\u0435\u043d\u0438\u0435 \u043f\u0440\u0438 \u0440\u0430\u0437\u0440\u044b\u0432\u0435<\/td><td>%<\/td><td>406<\/td><td>421<\/td><td>417<\/td><td>497<\/td><\/tr><tr><td>Modulus at 100%<\/td><td>\u041c\u041f\u0430<\/td><td>2.64<\/td><td>2.77<\/td><td>2.59<\/td><td>2.69<\/td><\/tr><tr><td>\u0423\u0434\u0435\u043b\u044c\u043d\u0430\u044f \u043f\u043b\u043e\u0442\u043d\u043e\u0441\u0442\u044c<\/td><td>\u0433\/\u0441\u043c\u00b3<\/td><td>1.220<\/td><td>1.238<\/td><td>1.241<\/td><td>1.242<\/td><\/tr><tr><td>\u041e\u0433\u043d\u0435\u0441\u0442\u043e\u0439\u043a\u043e\u0441\u0442\u044c<\/td><td>&nbsp;<\/td><td>&nbsp;<\/td><td>&nbsp;<\/td><td>&nbsp;<\/td><td>&nbsp;<\/td><\/tr><tr><td>Vertical Burning UL94<\/td><td>Rating<\/td><td>V-0<\/td><td>V-0<\/td><td>V-0<\/td><td>V-0<\/td><\/tr><tr><td>Limiting Oxygen Index LOI<\/td><td>%<\/td><td><strong>42.3<\/strong><\/td><td>35.4<\/td><td>&#8211;<\/td><td>&#8211;<\/td><\/tr><tr><td>Heat Aging (100\u2103\u00d770h)<\/td><td>&nbsp;<\/td><td>&nbsp;<\/td><td>&nbsp;<\/td><td>&nbsp;<\/td><td>&nbsp;<\/td><\/tr><tr><td>\u0418\u0437\u043c\u0435\u043d\u0435\u043d\u0438\u0435 \u0442\u0432\u0435\u0440\u0434\u043e\u0441\u0442\u0438<\/td><td>\u0411\u0435\u0440\u0435\u0433 \u0410<\/td><td>+5<\/td><td><strong>+3<\/strong><\/td><td>&#8211;<\/td><td>&#8211;<\/td><\/tr><tr><td>Tensile Strength Change<\/td><td>%<\/td><td>-7.56<\/td><td><strong>-3.54<\/strong><\/td><td>&#8211;<\/td><td>&#8211;<\/td><\/tr><tr><td>\u0418\u0437\u043c\u0435\u043d\u0435\u043d\u0438\u0435 \u0443\u0434\u043b\u0438\u043d\u0435\u043d\u0438\u044f<\/td><td>%<\/td><td>-34.05<\/td><td><strong>-18.31<\/strong><\/td><td>&#8211;<\/td><td>&#8211;<\/td><\/tr><tr><td>Compression Set (120\u2103\u00d724h)<\/td><td>%<\/td><td>\/<\/td><td>\/<\/td><td>52.94<\/td><td><strong>31.43<\/strong><\/td><\/tr><tr><td>\u0423\u043f\u0440\u0443\u0433\u043e\u0441\u0442\u044c<\/td><td>%<\/td><td>37<\/td><td><strong>47<\/strong><\/td><td>&#8211;<\/td><td>&#8211;<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Data Interpretation and Technical Analysis:<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>Processing and Curing Advantages (Significantly Shortened TC90):<br>The data show that at both 80 phr and 100 phr loadings, the\u00a0optimum cure time TC90 for FR99RP is reduced by approximately 50%\u00a0compared to FR98RP (e.g., 207s down to 96s at 80 phr). This translates to\u00a0significantly higher vulcanization throughput and lower energy consumption. Furthermore, FR99RP exhibits a higher torque delta (MH-ML), indicating a\u00a0higher crosslink density\u00a0and minimal interference with the rubber cure system, which is foundational for superior physical properties.<\/li>\n\n\n\n<li>Superior Mechanical Strength and Resilience:<br>At 80 phr loading, FR99RP achieves a tensile strength of\u00a09.26 MPa, which is\u00a021.4% higher\u00a0than FR98RP. Even at the higher loading of 100 phr, FR99RP maintains a high strength of\u00a09.32 MPa, whereas FR98RP drops to 6.35 MPa. Crucially, FR99RP significantly improves the resilience of the vulcanizate (from 37% to 47%), which is vital for the long-term sealing performance of dynamic applications.<\/li>\n\n\n\n<li>Heat Aging Resistance and Compression Set:<br>After thermal-oxidative aging at 100\u00b0C for 70 hours, the changes in hardness and tensile strength are markedly lower for FR99RP, indicating superior\u00a0thermal stability. The compression set data is particularly compelling: FR99RP exhibits a compression set of only\u00a031.43%\u00a0at 120\u00b0C, vastly outperforming FR98RP&#8217;s 52.94%. This demonstrates that the crosslink network formed in the presence of FR99RP possesses greater resistance to stress relaxation at elevated temperatures.<\/li>\n\n\n\n<li>Flame Retardancy and Char Morphology:<br>While FR98RP shows a marginally higher LOI value, both materials consistently achieve a UL94 V-0 rating. The critical difference lies in the\u00a0char morphology post-combustion: FR99RP forms a dense, hard,\u00a0ceramic-like char layer\u00a0that provides excellent heat and mass transfer insulation. In contrast, FR98RP intumesces aggressively but produces a loose, sooty ash. A dense char structure is more effective at preventing flame penetration and maintaining structural integrity under fire conditions.<\/li>\n<\/ol>\n\n\n\n<p class=\"wp-block-paragraph\">5. Validation Across Polymer Types and Hardness<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">To confirm the broad applicability of FR99RP, parallel comparisons were conducted in&nbsp;EPDM 50 Shore A&nbsp;and&nbsp;NBR 70 Shore A&nbsp;base formulations (detailed formulations available on Pages 8 &amp; 10 of the attached brochure). The findings are highly consistent, reinforcing that FR99RP is a premier&nbsp;FR99RP equivalent alternative flame retardant&nbsp;for legacy systems seeking performance upgrades.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>EPDM 50A System:\u00a0Tensile strength of FR99RP is 9.31 MPa vs. 8.03 MPa for FR98RP; Resilience 51% vs. 44%.<\/li>\n\n\n\n<li>NBR 70A System:\u00a0Torque delta MH-ML for FR99RP is 12.53 lbf-in vs. 8.45 lbf-in for FR98RP, highlighting FR99RP&#8217;s reduced interference with cure kinetics in polar rubber.<\/li>\n<\/ul>\n\n\n\n<figure class=\"wp-block-image aligncenter size-full\"><img decoding=\"async\" width=\"554\" height=\"406\" data-src=\"https:\/\/sanezenrubber.com\/wp-content\/uploads\/2026\/04\/2-6.png\" alt=\"Fire retardant for  EPDM rubber \" class=\"wp-image-4219 lazyload\" data-srcset=\"https:\/\/sanezenrubber.com\/wp-content\/uploads\/2026\/04\/2-6.png 554w, https:\/\/sanezenrubber.com\/wp-content\/uploads\/2026\/04\/2-6-300x220.png 300w, https:\/\/sanezenrubber.com\/wp-content\/uploads\/2026\/04\/2-6-16x12.png 16w, https:\/\/sanezenrubber.com\/wp-content\/uploads\/2026\/04\/2-6-500x366.png 500w\" data-sizes=\"(max-width: 554px) 100vw, 554px\" src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" style=\"--smush-placeholder-width: 554px; --smush-placeholder-aspect-ratio: 554\/406;\" \/><\/figure>\n\n\n\n<figure class=\"wp-block-image aligncenter size-full\"><img decoding=\"async\" width=\"554\" height=\"419\" data-src=\"https:\/\/sanezenrubber.com\/wp-content\/uploads\/2026\/04\/3-3.png\" alt=\"Fire retardant in NBR rubber \" class=\"wp-image-4220 lazyload\" data-srcset=\"https:\/\/sanezenrubber.com\/wp-content\/uploads\/2026\/04\/3-3.png 554w, https:\/\/sanezenrubber.com\/wp-content\/uploads\/2026\/04\/3-3-300x227.png 300w, https:\/\/sanezenrubber.com\/wp-content\/uploads\/2026\/04\/3-3-16x12.png 16w, https:\/\/sanezenrubber.com\/wp-content\/uploads\/2026\/04\/3-3-500x378.png 500w\" data-sizes=\"(max-width: 554px) 100vw, 554px\" src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" style=\"--smush-placeholder-width: 554px; --smush-placeholder-aspect-ratio: 554\/419;\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Conclusion:&nbsp;Regardless of hardness grade or polymer polarity (non-polar EPDM or polar NBR),&nbsp;FR99RP consistently delivers superior retention of mechanical properties, faster curing cycles, and enhanced high-temperature compression set resistance. It is the ideal choice for the next generation of high-performance, halogen-free, flame-retardant rubber components.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<p class=\"wp-block-paragraph\">6. Frequently Asked Questions (FAQs)<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Q1: What is the recommended dosage of FR99RP, and how does it affect hardness?<\/strong><br>A1:&nbsp;The typical recommended dosage ranges from&nbsp;60 to 130 phr, depending on the target flame retardant rating and desired physical properties. As a general guideline, adding&nbsp;6-8 phr&nbsp;of FR99RP typically increases hardness by approximately&nbsp;1 Shore A, and adding&nbsp;3-5 phr&nbsp;increases the Oxygen Index by approximately&nbsp;1 unit. Users should perform fine-tuning trials based on their specific formulations.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Q2: What is the most intuitive difference between FR99RP and FR98RP during use?<\/strong><br>A2:&nbsp;Beyond the quantified physical property improvements, the most noticeable differences are in&nbsp;processing flowability&nbsp;and&nbsp;post-combustion residue. Compounds containing FR99RP exhibit excellent flow and smooth extrusion surfaces with stable dimensions. After burning, FR99RP forms a hard, ceramic-like crust, whereas FR98RP typically leaves a loose, expanded ash.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Q3: Is FR99RP fully compliant with EU environmental regulations?<\/strong><strong><br><\/strong>A3:&nbsp;Yes. FR99RP is explicitly free of PBBs, PBDEs, chlorine, fluorine, and antimony trioxide. It complies with&nbsp;RoHS 2.0 (2011\/65\/EU &amp; 2015\/863)&nbsp;and&nbsp;WEEE&nbsp;directives, and meets&nbsp;REACH&nbsp;regulation requirements for SVHCs. Declarations of compliance and third-party test reports (e.g., SGS) are available upon request.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Q4: Does the curing system need adjustment when using FR99RP?<\/strong><br>A4:&nbsp;The data indicates that FR99RP has minimal negative impact on cure rate and may even shorten TC90. However, at very high loadings (&gt;100 phr), a slight&nbsp;increase in accelerator dosage (approx. 5-10%)&nbsp;might be beneficial to ensure optimal crosslink density. Alternatively, the original formulation can be retained to achieve faster production cycle times. Please consult SaneZen&#8217;s technical team for specific guidance.<\/p>\n\n\n\n<figure class=\"wp-block-image aligncenter size-full\"><img decoding=\"async\" width=\"554\" height=\"396\" data-src=\"https:\/\/sanezenrubber.com\/wp-content\/uploads\/2026\/04\/4.png\" alt=\" Fire retardant comply with REACH , Rohs \" class=\"wp-image-4221 lazyload\" data-srcset=\"https:\/\/sanezenrubber.com\/wp-content\/uploads\/2026\/04\/4.png 554w, https:\/\/sanezenrubber.com\/wp-content\/uploads\/2026\/04\/4-300x214.png 300w, https:\/\/sanezenrubber.com\/wp-content\/uploads\/2026\/04\/4-18x12.png 18w, https:\/\/sanezenrubber.com\/wp-content\/uploads\/2026\/04\/4-500x357.png 500w\" data-sizes=\"(max-width: 554px) 100vw, 554px\" src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" style=\"--smush-placeholder-width: 554px; --smush-placeholder-aspect-ratio: 554\/396;\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">7. Contact Us<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">For sample requests, detailed formulation guidance, or UL certification documentation, please contact us.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">SaneZen Group \/ Shanghai Powerflex New Material Co., Ltd.<br><em>High-Performance Elastomer Material Solution Experts<\/em><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Commercial Address:\u00a0Room 1606-1608, Boda Commercial Buildings, No. 11 Puhuitang Road, Xuhui District, Shanghai, China 200030<\/li>\n\n\n\n<li>\u0410\u0434\u0440\u0435\u0441 \u0437\u0430\u0432\u043e\u0434\u0430: Baishou Road, North District, Xuanzhou Economic Development Zone, Xuancheng City, Anhui Province, China.<\/li>\n\n\n\n<li>Tel:\u00a00086 21 6487 9251<\/li>\n\n\n\n<li>Fax:\u00a00086 21 5106 2693<\/li>\n\n\n\n<li>\u042d\u043b\u0435\u043a\u0442\u0440\u043e\u043d\u043d\u0430\u044f \u043f\u043e\u0447\u0442\u0430: yorichen@sanezen.com<\/li>\n\n\n\n<li>\u0412\u0435\u0431-\u0441\u0430\u0439\u0442:\u00a0<a href=\"https:\/\/sanezenrubber.com\/ru\/\"><u>www.sanezenrubber.com<\/u><\/a><\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"<p>With the rapid advancement of rail transit, automotive electronics, and renewable energy sectors, the market imposes unprecedented stringent requirements on the flame retardancy, environmental compliance, and physical properties of rubber products. Traditional halogenated flame retardants are either phased out due to environmental concerns or struggle to meet high-end applications due to adverse effects on crosslink [&hellip;]<\/p>","protected":false},"author":2,"featured_media":4221,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"_seopress_robots_primary_cat":"","_seopress_titles_title":"","_seopress_titles_desc":"","_seopress_robots_index":"","footnotes":""},"categories":[1],"tags":[],"class_list":["post-4217","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-technical-communication"],"blocksy_meta":[],"acf":[],"_links":{"self":[{"href":"https:\/\/sanezenrubber.com\/ru\/wp-json\/wp\/v2\/posts\/4217","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/sanezenrubber.com\/ru\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/sanezenrubber.com\/ru\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/sanezenrubber.com\/ru\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/sanezenrubber.com\/ru\/wp-json\/wp\/v2\/comments?post=4217"}],"version-history":[{"count":1,"href":"https:\/\/sanezenrubber.com\/ru\/wp-json\/wp\/v2\/posts\/4217\/revisions"}],"predecessor-version":[{"id":4222,"href":"https:\/\/sanezenrubber.com\/ru\/wp-json\/wp\/v2\/posts\/4217\/revisions\/4222"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/sanezenrubber.com\/ru\/wp-json\/wp\/v2\/media\/4221"}],"wp:attachment":[{"href":"https:\/\/sanezenrubber.com\/ru\/wp-json\/wp\/v2\/media?parent=4217"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/sanezenrubber.com\/ru\/wp-json\/wp\/v2\/categories?post=4217"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/sanezenrubber.com\/ru\/wp-json\/wp\/v2\/tags?post=4217"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}