Technical Data Sheet PARALOID EXL-3815 IMPACT MODIFIER (21518XP) Maleic Anhydride (MAH) Grafted Polyolefin for Polyamide Applications Regional Availability Introduction Asia Pacific, Europe Very high-flow polyamide compounds are often desired on the market for a wide variety of injection-moulding applications, such as thin-walled components in the electrical, electronics and automotive areas. Higher flow also enables shorter injection moulding cycle times which is also key to improve productivity and costs, a constant quest in the industry. Rubbers, although required for improving mechanical properties such as impact strength, usually affect the melt viscosity in a negative fashion. A new generation impact modifier, PARALOID EXL-3815, has been developed by Dow Plastics Additives, and yields a much better retention of flow properties compared to standard modifiers. PARALOID EXL-3815 also takes the impact performance of polyamide compounds to the next level, enabling new applications unforeseen so far. Description PARALOID EXL-3815 Impact Modifier is a low crystallinity ethylene-octene copolymer functionalized with maleic anhydride (MAH) by reactive extrusion. PARALOID EXL-3815 displays excellent compatibility and bonding with polyamide matrices. It is highly versatile and provides excellent performance in PA6, 66 and glass-reinforced compositions. Its low Tg, below 50 C, ensures outstanding performance at low temperatures. Its fully saturated backbone results in good thermal and oxidative stability. Product Performance As can be seen from the graph below, PARALOID EXL-3815 Impact Modifier yields a higher melt flow in polyamide 6 compared to a standard modifier at equivalent addition level. A twofold improvement is observed at 20% loading. However, this improvement does not come at the expense of impact performance: PARALOID EXL-3815 offers significantly enhanced impact strength from low addition levels up to high loadings (e.g. 25%). Strength @ RT (J/m) 800 700 600 500 400 300 200 100 0 25% 20% 25% 20% 15% 15% 10% 10% 5% 5% PARALOID Paraloid EXL-3815 EXL-3815 Standard modifier Neat PA6 Labels indicate modifier loading in wt% 0 10 20 30 40 50 60 70 MVI (cc/10mn) - 235 C/5kg Page 1 of 6
Product Performance (cont d) A +24% flow length is also measured with a compound based on 20% PARALOID EXL-3815 Impact Modifier, when injection-moulded into a spiral mould, as shown by the pictures below, thus corroborating the improved behaviour observed in the melt index test. +24% flow length The graph below illustrates the performance profile for PARALOID EXL-3815, highlighting especially enhanced impact strength at sub-zero temperature and flow, compared to a standard modifier. MVI (cc/10min) Flexural Modulus (MPa) 1649 1616 20 10 637 329 Nii @RT @RT(J/m) (J/m) Tensile Modulus (MPa) 1786 1699 52 51 147 37 79 Nii @-30 C @-30ºC (J/m) 559 HDT ( C) Ci (kj/m²) Notched Charpy Impact @-30ºC (kj/m 2 ) Standard Modifier PARALOID EXL - 3815 Page 2 of 6
Product Performance (cont d) Glass-fiber reinforced polyamides are also crucially important on the market, and also there, a high flow becomes key for moulders. The following graph shows essentially improved flow and impact strength for a 10% addition level in a composition containing 30% short glass fibers. Flexural Modulus (MPa) MVI (cc/10min) 9 Nii @RT @RT(J/m) (J/m) 7144 6952 7 222 220 Elongation at break (%) 3,6 3,7 7683 7782 202 202 126 133 Nii @-30ºC @-30 C(J/m) Tensile Modulus (MPa) HDT ( C) PA6/GF30 + Standard Modifier PA6/GF30 + PARALOID EXL - 3815 Page 3 of 6
Product Performance (cont d) Being a highly versatile additive, PARALOID EXL-3815 also provides excellent performance in PA66, as can be seen from the graph below, with similar flow advantages than those provided in polyamide 6. PARALOID EXL-3815 gives a MFR of 21 g/10mn at 280 C/2,16kg versus 5 for the standard rubber used. strength @ RT ( J/m) 1200 1000 800 600 400 200 20 % Loading PARALOID Paraloid EXL-3815 EXL-3815 Standard modifier 0-40 -30-20 -10 0 10 20 30 Temperature ( C) Page 4 of 6
Regulatory Information Processing Information PARALOID EXL-3815 Impact Modifier is food contact approved according to European Directive on Food Packaging 2002/72/EC, and FDA regulations. PARALOID EXL-3815 Impact Modifier is supplied in a dust-free pellet form, easy to handle. It can be mixed with polyamide granules. PARALOID EXL-3815 is easily dispersed into polyamides by controlled addition of the additive during melt mixing in a twin screw extruder, using standard heating profile used for polyamide resins. Storage Handling Precautions Store products in tightly closed original containers at temperatures recommended on the product label. Before using this product, consult the Safety Data Sheet (SDS) for details on product hazards, recommended handling precautions and product storage. CAUTION! Keep combustible and/or flammable products and their vapors away from heat, sparks, flames and other sources of ignition including static discharge. Processing or operating at temperatures near or above product flashpoint may pose a fire hazard. Use appropriate grounding and bonding techniques to manage static discharge hazards. Disposal Considerations Dispose in accordance with all local, state (provincial) and federal regulations. Empty containers may contain hazardous residues. This material and its container must be disposed in a safe and legal manner. It is the user's responsibility to verify that treatment and disposal procedures comply with local, state (provincial) and federal regulations. Contact your Dow Plastics Additives Technical Representative for more information. Product Stewardship Dow has a fundamental concern for all who make, distribute, and use its products, and for the environment in which we live. This concern is the basis for our product stewardship philosophy by which we assess the safety, health, and environmental information on our products and then take appropriate steps to protect employee and public health and our environment. The success of our product stewardship program rests with each and every individual involved with Dow products from the initial concept and research, to manufacture, use, sale, disposal, and recycle of each product. Page 5 of 6
Medical Applications Policy NOTICE REGARDING MEDICAL APPLICATION RESTRICTIONS: Dow will not knowingly sell or sample any product or service ( Product ) into any commercial or developmental application that is intended for: long-term or permanent contact with internal body fluids or tissues. Long-term is contact which exceeds 72 continuous hours; use in cardiac prosthetic devices regardless of the length of time involved ( cardiac prosthetic devices include, but are not limited to, pacemaker leads and devices, artificial hearts, heart valves, intra-aortic balloons and control systems, and ventricular bypass-assisted devices); use as a critical component in medical devices that support or sustain human life; or use specifically by pregnant women or in applications designed specifically to promote or interfere with human reproduction. Dow requests that customers considering use of Dow products in medical applications notify Dow so that appropriate assessments may be conducted. Dow does not endorse or claim suitability of its products for specific medical applications. It is the responsibility of the medical device or pharmaceutical manufacturer to determine that the Dow product is safe, lawful, and technically suitable for the intended use. DOW MAKES NO WARRANTIES, EXPRESS OR IMPLIED, CONCERNING THE SUITABILITY OF ANY DOW PRODUCT FOR USE IN MEDICAL APPLICATIONS. Customer Notice Dow strongly encourages its customers to review both their manufacturing processes and their applications of Dow products from the standpoint of human health and environmental quality to ensure that Dow products are not used in ways for which they are not intended or tested. Dow personnel are available to answer your questions and to provide reasonable technical support. Dow product literature, including Safety Data Sheets, should be consulted prior to use of Dow products. Current Safety Data Sheets are available from Dow. Contact: North America: 1-800-447-4369 Latin America: (+55)-11-5188-9000 Europe: (+800)-3-694-6367 (Toll) +31-11567-2626 Asia-Pacific: (+800)-7776-7776 (Toll) +60-3-7965-5392 http://www.dow.com NOTICE: No freedom from infringement of any patent owned by Dow or others is to be inferred. Because use conditions and applicable laws may differ from one location to another and may change with time, Customer is responsible for determining whether products and the information in this document are appropriate for Customer's use and for ensuring that Customer's workplace and disposal practices are in compliance with applicable laws and other government enactments. The product shown in this literature may not be available for sale and/or available in all geographies where Dow is represented. The claims made may not have been approved for use in all countries. Dow assumes no obligation or liability for the information in this document. References to Dow or the Company mean the Dow legal entity selling the products to Customer unless otherwise expressly noted. NO WARRANTIES ARE GIVEN; ALL IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE ARE EXPRESSLY EXCLUDED. Page 6 of 6