<p>Over time, more demands are being made on materials used during the construction of civil structures. Buildings must be easy to maintain, weather resistant, and safe to use. Rubbers with these functional attributes need to be made; they are not naturally available. At Devashish Polymers, we have consistently undertaken R&amp;D to bring to life rubber compounds that match industry requirements in terms of both functionalities as well as price.</p>

<h4>The construction industry has multiple use cases for specially made-rubber compounds.<strong> In this price-sensitive market, we offer our products at reasonable rates.</strong></h4>

<p>High-functionality materials that offer a range of features are increasingly becoming the norm. This trend is due to industry and citizens seeking to conserve energy, reduce external noise, remain sustainable and minimize their environmental footprint while being durable and easy to maintain.</p>

<h4>Increasing demand for<strong> Specialty Rubber materials.</strong></h4>

<p>External sounds are always an intrusion into the life of people residing in buildings. Using high-performance rubber compounds as seals for windows can dampen sound to a desirable extent.</p><p>Moreover, in high-rise apartments, the rubber sealants of windows are exposed to atmospheric impacts and ozone-related rubber degradation. High-performance Compounds from Devashish can prevent these and extend the serviceable life of rubber parts.</p><p>Speciality compounds also deliver longevity and integrity of rubber sealants in pipes used to transport potable water, sewerage, and water for firefighting.</p>

<h4>Muting External Sounds,&nbsp;atmospheric<strong> impact &amp; extending longevity of pipes.</strong></h4>

<h3><strong>Building &amp; Construction&nbsp;</strong></h3><h3>Industry</h3>

Building and Construction.mp4

Balancing functionality with price in speciality rubbers for Construction Industry. 

Building and Construction Industry

DEVASHISH POLYMERS 480-792_V2.mp4

<p>Rubber Compound delivering exceptional tear resistance &amp; Superior Performance.</p>

<h3><strong>FluoroMacht™</strong><br>FKM Compounds</h3>

<hr><h4>Delivering High Performance with <strong>expectational tear strength</strong></h4><p>The FluoroMacht™ range of compounds offers you a complete range of recipe-based compounds developed in-house with rigorous testing and certification.&nbsp;</p><p>The FluoroMacht™ Fluoroelastomer range of compounds are produced with fluorine contents of 65% to 71% with cure systems in bisphenol, amine or peroxide. The range of compounds adheres to performance grades such as BRE_with base resistance and low temperature.</p><p><img src="https://devashishcms.tinglabs.in/uploads/Product_Fluoro_Macht_FKM_Compounds_Comparison_Among_Rubbers_1_0a4cacdb6b.svg" alt="Product_FluoroMacht™ FKM Compounds_Comparison Among Rubbers (1).svg"></p><p><img src="https://devashishcms.tinglabs.in/uploads/Product_Fluoro_Macht_FKM_Compounds_Effect_of_fluorine_content_1_20a2d0b097.svg" alt="Product_FluoroMacht™ FKM Compounds_Effect of fluorine content (1).svg"></p>

<hr><h4>Speciality <strong>Compounds</strong></h4><p><strong>Our range includes materials that deliver</strong></p><ul><li>Low Viscosity with enhanced tear resistance in hot state/conditions.</li><li>Low Shrinkage - specially designed compounds that provide shrinkage (out of the mould) and post-curing processes comparable with other elastomer-based compounds such as Nitrile or similar. These deliver the advantage of avoiding tool changes.</li><li>Reduced Post-Curing - designed to achieve similar mechanical properties and processing conditions but with better compression set and heat ageing characteristics with reduced post-curing times as low as 2 hours when compared to the standard post-curing need of up to 24 hours.</li><li>Thick Cross Section compounds - designed/formulated with resistance to opening or line of breakages caused by cracking or splitting. This range of compounds delivers increased bond strength between the rubber and the metal substrate.</li><li>Custom Color compounds - are custom colour-matched compounds that ensure batch-to-batch colour consistency. They are available in various colours, from light to dark and vibrant shades.</li></ul><hr><h4>Tetrafluoroethylene/Propylene <strong>(TFEP)</strong></h4><p>TFEP or FEPM Compounds with fluorine of 55% are developed for enhanced resistance to Acids, Alkalis, Hot&nbsp;<br>Water and Steam. Compared with the standard Fluoroelastomer compounds, these compounds offer superior&nbsp;resistance in mediums such as amines and phosphate esters.</p>

FluoroMacht™ FKM COMPOUNDS

<p>The Rubber Compound that can meet the quality of a combination of Elastomers.</p>

<h3><strong>Epistark™&nbsp;</strong></h3><h3>ECO Compounds</h3>

<hr><h4>The versatile compound with <strong>balanced properties</strong></h4><p>Epichlorohydrin Elastomers have the balanced properties of natural rubber in line with other elastomers such as acrylonitrile butadiene rubber, polychloroprene and acrylate elastomers. Such versatility is usually not available in a single material type. Its major benefit is &nbsp;that it can meet the qualities of a combination of such elastomers. Our Epichlorohydrin-based Epistark™ compounds in elastomers maintain their original properties and shape over various temperatures. In addition, it is rated for continuous and extreme performance in its resistance to gas permeation.</p><p><img src="https://devashishcms.tinglabs.in/uploads/Product_Epistark_ECO_Compounds_2_4166c1b713.svg" alt="Product_Epistark™ ECO Compounds (2).svg"></p><hr><h4>Your choice of properties in your <strong>Epistark™ Compound</strong></h4><p>We offer Epistark™ range of compounds of several different types with exceptional properties. They are typically offered individually in the categories below or even as a combination to expand the requirements of a single Epistark™ compound,</p>

<hr><h4>Epistark™ Compounds range includes materials that <strong>deliver to your requirements</strong></h4><ul><li>It is about two times as impermeable to air as butyl rubber.</li><li>Products manufactured of both homopolymer, and copolymer exhibit low swell in ASTM oils, aliphatic solvents and aromatic fuels.</li><li>It has true low-temperature flexibility, not just a low brittle point. This puts the copolymer elastomer in the oil-resistant, low-temperature class with polysulfide and fluorinated elastomers.</li><li>Epistark™ Compounds maintain their rubber-like qualities longer in the air than most oil-resistant elastomers.</li><li>Most of the elastomers show a softening behaviour as ambient temperatures increase. However, Epistark™ compounds retain hardness and resilience from room temperature to 177°C (350°F) which is far better than many other elastomer types.</li><li>MOISTURE VAPOR TRANSMISSION RATE (MVTR) Due to the high polarity of Epichlorohydrin, permeability to water vapour is in sharp contrast to the retention of dry gasses.</li><li>Epistark™ Compounds in Copolymer and Terpolymer use amorphous materials; hence we do not see crystallisation at temperatures between 0°C and the compound's freezing point (T100).</li><li>Epistark™ Compound have substantial resistance to motor fuels at both ambient and elevated temperatures, leveraging advantage over most elastomers that have resistance to fuel, allowing greater versatility in the design of fuel-handling equipment.</li><li>Epistark™ Compound does emit lower volume swells in general and common liquids.</li></ul>

Epistark™ ECO COMPOUNDS

<h4>HNBR Compounds range includes materials <strong>that cater to your requirements</strong></h4>

<p>The Compound delivers superior heat and oil exposure without losing its mechanical qualities.</p>

<h3><strong>HNBR&nbsp;</strong></h3><h3>COMPOUNDS</h3>

<hr><h4>Devashish’s HNBR <strong>Rubber compounds are what you seek!</strong></h4><p>HNBR represents a range of synthetic polymers known for their physical strength and resistance to heat, Oil &amp; Chemicals. Hydrogenated nitrile polymers are manufactured by the catalytic hydrogenation of conventional nitrile butadiene rubber (NBR) polymers.<br>The nitrile groups are unaffected during the process, but the carbon-carbon double bonds in nitrile rubber are converted into more stable single bonds. As a result, we can manufacture and supply different grades through precise control of the proportion of unconverted double bonds in the material - 10% is considered an upper limit, but grades containing 4-8% (partially hydrogenated) or virtually no double bonds (fully hydrogenated) are used in most cases.</p><p><img src="https://devashishcms.tinglabs.in/uploads/HNBR_Rubber_Compounds_2_4b72913847.svg" alt="HNBR Rubber Compounds (2).svg"></p><hr><p>&nbsp;</p><h4>Choose your HNBR <strong>Compound properties</strong></h4><p>When selecting an HNBR polymer for a specific application, there are three criteria to consider:</p>

<hr><h4>Effect of <strong>Saturation</strong></h4><p>HNBR Compounds are highly saturated nitrile polymers consisting of acrylonitrile groups, ethylene chains and butadiene carbon-to-carbon double bonds. After hydrogenation consisting of acrylonitrile groups, this structure provides oil, fuel and solvent resistance, good abrasion resistance, and high physical properties. The saturated ethylene chains provide rubber elasticity, chemical stability, heat resistance, and ozone protection. Hydrogenation increases with the base nitrile polymer, and elongation property changes with increasing saturation and improves in direct relation to saturation. The presence of a small amount of the unsaturated butadiene group, typically between 0.2% and 15%, allows vulcanisation with sulfur or peroxide cure systems.</p><hr><h4>Effects of <strong>ACN Content</strong></h4><ul><li>The ACN content is one of two primary criteria defining each specific HNBR grade. In addition, the ACN level, because of polarity, determines several basic properties, such as oil and solvent resistance, low-temperature flexibility/glass transition temperature, and abrasion resistance.</li><li>Higher ACN content improves solvent, oil, abrasion resistance, and glass transition temperature.</li><li>The increase in ACN content Processability delivers Cure Rate with Sulfur Cure System, Fuel Resistance, Oil Resistance Compatibility with Polar Polymers, Gas Impermeability, Air Impermeability, Tensile Strength, Abrasion Resistance, and improved Heat-Aging.</li><li>Today, HNBR ranges from approximately 17 to 50 %. Therefore, it affects not only the fluid content but also low-temperature performance.</li><li>Higher ACN content means poor low-temperature flexibility.</li></ul><hr><h4>Effect of <strong>RDB Content</strong></h4><ul><li>An HNBR with different amounts of RDB (residual double bond) contents can be produced by controlled hydrogenation of NBR.</li><li>HNBR with high RDB can be cross-linked using Sulfur and Peroxide.</li><li>High RDB increases crosslinking density.</li><li>High RDB increases the compression set and reduces the ageing stability of the material.</li></ul>

HNBR COMPOUNDS

<h4>EPDM Applications <strong>across different industries</strong></h4>

<p>Discover the possibilities of EPDM Compounds that deliver high energy efficiency with minimum footprint.&nbsp;</p>

<h3><strong>EPDM&nbsp;</strong><br>Compounds</h3>

<hr><h4>Thrives in the harshest conditions that defeat <strong>Natural rubber, SBR and Butadiene</strong></h4><p>EPDM Compounds also deliver higher energy efficiency with a minimal environmental footprint.<br>Ethylene Propylene Diene Monomer EPDM is a saturated polymer chain of the polyethene type, consisting of ethylene, propylene, and diene. It is one of the most widely used and in-demand synthetic rubbers.</p><p>We have expanded the range of EPDM products available through Continued Technology development driven by novel catalysts and process innovations.</p><figure class="image"><img alt="Product_EPDM Compounds_Thrives in the harshest conditions_Banner.jpg" src="https://devashishcms.tinglabs.in/uploads/Product_EPDM_Compounds_Thrives_in_the_harshest_conditions_Banner_fb8f9c6958.jpg" srcset="https://devashishcms.tinglabs.in/uploads/thumbnail_Product_EPDM_Compounds_Thrives_in_the_harshest_conditions_Banner_fb8f9c6958.jpg 245w, https://devashishcms.tinglabs.in/uploads/small_Product_EPDM_Compounds_Thrives_in_the_harshest_conditions_Banner_fb8f9c6958.jpg 500w, https://devashishcms.tinglabs.in/uploads/medium_Product_EPDM_Compounds_Thrives_in_the_harshest_conditions_Banner_fb8f9c6958.jpg 750w, https://devashishcms.tinglabs.in/uploads/large_Product_EPDM_Compounds_Thrives_in_the_harshest_conditions_Banner_fb8f9c6958.jpg 1000w" sizes="100vw" width="1000"></figure>

<hr><h4>Choose the EPDM Compound to <strong>suit your Application</strong></h4><p>Choose by Molecular Weight</p><figure class="table" style="width:100%;"><table class="ck-table-resized"><colgroup><col style="width:21.82%;"><col style="width:26.85%;"><col style="width:51.33%;"></colgroup><thead><tr><th style="text-align:center;" colspan="3">EPDM Products chosen by molecular weight can be subdivided into three broad categories</th></tr></thead><tbody><tr><td>Low-medium viscosity</td><td>ML (1 + 3) 100°C-in the range 25-60</td><td>Low-viscosity polymers are preferable for good-quality compounds with moderate filler content.</td></tr><tr><td>Medium-high viscosity</td><td>ML (1 + 4) 125°C-in the range 60-100</td><td>Some compounds in this group types contain a certain amount of oil to ease processing. High viscosities are useful to produce low-cost compounds or for improved processability</td></tr><tr><td>Very high viscosity</td><td>ML (1 + 4) 125°C-up to 200 (nominal)</td><td>Those of type (c) is always oil extended</td></tr></tbody></table></figure><hr><h4>The Possibilities &amp; <strong>the Difficulties</strong></h4><h5>Processibility &amp; Extrudability&nbsp;</h5><p>With increased molecular weight measured by Mooney viscosity, we can mix compounds with increased green strength (leading to better tear strength), tensile strength, increased cross-linked density and better thermal resistance. However, despite several advantages, we may experience difficulty in processability and Extrudability.<br>&nbsp;</p><h5>New materials, Increased Choices</h5><p>Today, with a broad range of materials available, we have choices of materials with even broadened molecular weight distribution providing ease in processability (Reduced compound Mooney), Calendaring (Elasticity), Extrudability (Reduced die swell), and higher elongation (with a reduced rate and state of cure and evident decrease in tensile strength)<br>&nbsp;</p><h5>The Role of Ethylene Content</h5><ul><li>Increased ethylene increases its crystallinity, higher cold green strength, and higher tensile strength, with advantages in filler loading.&nbsp;</li><li>The ethylene content of commercial ethylene-propylene-diene rubber is between 45 and 75 per cent. Grades with an ethylene content of 45 to 55 per cent weight are amorphous and offer the best low-temperature flexibility.</li><li>EPDM grades with an ethylene content of 55 to 65 per cent are partially crystalline. When the ethylene content rises, the crystallinity increases too.</li><li>Terpolymers containing more than 65-weight per cent ethylene have larger crystalline regions and behave like thermoplastic elastomers. Even in the uncured state, their tear strength is very high.</li><li>The diene content of commercial products is between 2 and 12 per cent. This corresponds to 3 to 16 double bonds per 1000 carbon atoms. A higher diene content leads to a higher crosslinking rate, higher strength values and lower permanent deformation. By contrast, the weathering, ozone, and ageing resistance drops as the diene content increases.</li></ul><hr><h4>Unsaturation <strong>Level</strong></h4><p>The third monomers currently being used, as already mentioned, are ethylidene norbornene (ENB), 1,4-hexadiene (1,4-HD) and dicyc1opentadiene (DCPD).</p><figure class="table" style="width:100%;"><table class="ck-table-resized"><colgroup><col style="width:31.11%;"><col style="width:68.89%;"></colgroup><thead><tr><th style="text-align:center;" colspan="2">According to their third monomer content, EPDMs can be classified into three groups</th></tr></thead><tbody><tr><td style="vertical-align:top;">Medium unsaturation content of 3-5 % in weight</td><td style="vertical-align:top;">Medium unsaturation polymers are those currently used in standard compounds and applications.</td></tr><tr><td style="vertical-align:top;">High unsaturation content of 5-7 % in weight&nbsp;</td><td style="vertical-align:top;">The higher unsaturation polymers are more suitable for blending with unsaturated rubbers or giving particularly short curing cycles</td></tr><tr><td style="vertical-align:top;">Very high unsaturation content of 8-10% in weight</td><td style="vertical-align:top;">Compounds mixed with EPDM polymers with increased ENB result in better cure&nbsp;<br>rate, cure state, modulus, hardness, and elasticity.It also gives us flexibility in using accelerators; at the same point, we do observe a decrease in heat resistance, ozone resistance and scorch safety&nbsp;</td></tr></tbody></table></figure><hr><h4>Characteristics of our <strong>EPDM Compounds</strong></h4><ul><li>Our compound can have a reasonably wide operational temperature range of -50 °C to +150 °C.</li><li>It's suitable for sub-zero environments and cold materials. In addition, it offers outstanding weathering properties, including excellent ozone and sunlight resistance.</li><li>It delivers excellent tear, abrasion, and steam resistance and good resistance to compression set, dilute acids, ketones, and alkalis.&nbsp;</li><li>Its widely used as a lower-cost polymer thanks to its comprehensive capabilities and good processing abilities.</li><li>It has excellent water resistance, fresh and salt, and is very good with ozone, UV and oxidation.</li><li>It has moderately high flame and cold resistance, with very high flexibility. Moderately stretchy</li></ul>

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Building & Construction

Industry

The construction industry has multiple use cases for specially made-rubber compounds. In this price-sensitive market, we offer our products at reasonable rates.

Increasing demand for Specialty Rubber materials.

Muting External Sounds, atmospheric impact & extending longevity of pipes.

Product Range

FluoroMacht™ FKM COMPOUNDS

Epistark™ ECO COMPOUNDS

HNBR COMPOUNDS

EPDM COMPOUNDS