DOCSLIB.ORG

Product Overview Table of Contents Page the Krytox™ Advantage

Total Page：16

File Type：pdf, Size：1020Kb

Download full-text PDF Read full-text

Load more

Performance Lubricants Product Overview Table of Contents Page The Krytox™ Advantage . 1 Introduction to Krytox™ Lubricants . 1 Key Benefits . 1 Krytox™ Base Oil Environmental Advantages . 1 Krytox™ Performance Characteristics . 2 Extreme Temperature Performance . 2 Cost-Effective . 2 Performance Additives . 2 Compatibility with Elastomers and Plastics . 2 Extreme Pressure (EP) . 3 Krytox™ Properties . 3 Composition . 3 Consistency . 4 Stability . 5 Krytox™ Product Lines . 8 Industries and Applications . 11 Aerospace, Aviation, and National Defense . 11 Automotive — Squeak and Rattle . 11 Automotive — Mechanical Systems . 12 Chemical and Petrochemical . 12 Box Board Corrugating . 13 Electronics/Semiconductor . 13 Food Processing . 14 Medical Industry Equipment Applications . 14 Metal Processing . 14 Oxygen and Reactive Gas Service . 14 Power Generation . 15 Pulp and Paper . 15 Textile . 16 Tire Mold . 16 Additional Information and Literature Requests . 16 Krytox™ Performance Lubricants The Krytox™ Advantage Introduction to Krytox™ Lubricants Discovered in 1959, the polymer that would become known worldwide as Krytox™ showed remarkable thermal and oxidative stability . Potential uses envisioned then included lubricant for the MACH 3+ turbine engine, hydraulic oil, rocket gear box lubricant, and even gyroscope oil . In 1963, Krytox™ oil was used in a GE engine test for the supersonic transport aircraft . In 1964, new Krytox™ perfluoropolyether (PFPE)-based grease formulations Key Benefits were developed jointly with the U .S . Navy and Air The key benefits of Krytox™ lubricants include: Force, resulting in military specification MIL-G-27617, which was developed specifically for Krytox™ . The first • Extreme temperature stability, with operating ranges commercial sales of Krytox™ were for nonflammable from –75–350 °C (–103–662 °F) and as high as lubricants for the Apollo space program in 1965 . 400 °C (752 °F) with appropriate metallurgy Prior to 1981, the only commercially available Krytox™ • Longer lasting lubricant life lubricants were aerospace oil and greases . Since then, • Decreased equipment failure and maintenance: PFPE-based oils and greases have been adopted across warranty claims and replacement costs may be reduced a very wide range of industries and applications . There are • Increased profits: reduced downtime and maintenance PFPE oils and greases for industrial operations, vacuum costs pump fluids, incidental food contact, automotive uses, • Odorless and colorless reactive gas, and, of course, military applications—to name just a few . • Inert, non-toxic, and nonflammable • Stable in 100% liquid or gaseous oxygen environment Today, of course, it’s our well-known trademark for high performance synthetic lubricants used for a • Global distribution variety of applications . Krytox™ oils are made from only • World-class technical service fluorine, carbon, and oxygen—a mixture of compounds Krytox™ Base Oil Environmental Advantages collectively known by many names—including PFPE, perfluoroalkylether (PFAE), and perfluoropolyalkylether Krytox™ lubricants provide longer lasting lubrication that (PFPAE) . Krytox™ perfluorinated oils and greases deliver reduces frequency of re-lubrication, not only reducing high performance, perform at wide temperature ranges, operating costs, but also reducing waste and potential and provide superior quality lubrication under extreme impact on the environment . Krytox™ lubricants are conditions in comparison to hydrocarbon alternatives . undamaged by, and non-reactive with, acidic or caustic And, with a global distribution network and world-class cleaners and disinfectants, steam, moisture or high technical service, Krytox™ is the lubricant of choice for temperatures . The original properties of the fluids can extreme conditions and performance . be restored through regeneration; thus, reducing or minimizing disposal and incineration . Chemours has a The use of Chemours unique PTFE thickener provides regeneration program that reclaims PFPE fluid . This superior chemical and thermal stability to all Krytox™ lowers the overall cost of the fluids, and reduces or grease product lines . Many greases are also available minimizes safety and environmental disposal problems . with additional anti-wear and anti-corrosion additives to further boost performance in critical operations . Key environmental benefits specific to Krytox™ base oil include: Krytox™ performance lubricants provide superior performance and extended life as lubricants, sealants, and • Chemical, biological, and environmental inertness dielectrics . With exceptional performance and reliability in • Non-toxic and silicone-free formulation the toughest conditions—where productivity matters and • No hazardous VOC materials or chlorine content downtime costs—Krytox™ can contribute significantly to lowering the cost of doing business . • Non-hazardous to the atmosphere or ozone layer • Smaller environmental footprint 1 Krytox™ Performance Lubricants Krytox™ Performance Characteristics containing anti-wear additives have properties that give Extreme Temperature Performance high specific load-carrying capacity and the highest protection against wear . Krytox™ oils and greases are the product of choice in extreme temperature conditions . Most petroleum Compatibility with Elastomers and Plastics products begin to degrade above 99 °C (210 °F) and are Krytox™ base oil is compatible with all elastomeric seal too viscous at temperatures just below –18 °C (0 °F) . materials and engineering plastics . The limiting factor 1 ™ Under the D-3336 test conditions of 177 °C (350 °F) when using standard Krytox with any material is the and 10,000 rpm, the majority of competing hydrocarbon thermal stability of the elastomer or plastic . lubricants fail in less than 1,000 hr . But, the general- Krytox™ performance lubricants are compatible with most purpose line of Krytox™ lubricants has been shown to common elastomers and plastics including: last over 5,000 hr without failure, even at an increased temperature of 200 °C (392 °F) . This extreme condition ABS PEBA performance is what distinguishes Krytox™ performance Acetal—homopolymer PEEK lubricants from other competing products . and copolymer Polyamides Aramids Cost-Effective Polycarbonate Buna N Krytox™ lubricants are cost-effective across a wide Polyetheramide block Butyl 325 copolymer range of applications . Due to their inert nature, Krytox™ lubricants provide a much longer usable life as compared Chlorosulfonated Polyethylene to typical hydrocarbon oils and greases; and the longer polyethylene Polypropylene ® usable life allows them to remain for considerable Delrin acetal PTFE fluorocarbon periods of time before needing to be replaced, if they are EPDM PVC replaced at all . That translates to savings over time, both EPT, peroxide cure SBR by lowering the amount of lubricant purchased and any Ethylacrylate downtime incurred during re-lubrication . SEBS FEP Silicone Performance Additives Fluoroelastomers Styrene ethylene butylene ™ Anti-corrosion additives are combined with Krytox Fluorosilicone polymer grease to enhance its ability to protect metallic surfaces HDPE Styrenic polymer from corrosion caused by moisture and oxygen . Chemours HNBR Teflon™ fluorocarbon also offers a patented oil-soluble additive to give the same corrosion protection to our oils . Krytox™ greases Hydrocarbon rubber Thermoplastic polyurethane Hypalon® synthetic rubber Thermoset polymers Hytrel® polyester elastomer Thermoplastic rubber Kalrez® fluoroelastomer2 TPE LDPE TPU Methyl silicone Urethane Natural rubber Vamac® ethylene acrylic NBR elastomers ® Neoprene WRT Vespel polyimide resin ™ Nitrile Viton fluoroelastomers ® Nylon Zytel nylon Nylon 6 Nylon 6,6 Nylon 12 1 The “standard” Krytox™ lubricant is PTFE-thickened PFPE oil with no additives . 2 15–20 vol% swelling at high temperatures when immersed in PFPE oil . 2 Krytox™ Performance Lubricants Extreme Pressure (EP) Table 2 ™ Krytox™ heavy-duty greases are used for high loading Extreme Pressure Properties* of Krytox Greases GPL GPL or slow speeds . EP greases have high load-carrying 240 AZ 240 AC 250 AC capability and good lubrication characteristics under 225 226 boundary and mixed friction conditions . In addition to the Load Wear Index 75 127.8 >161 None** None** EP additive in Krytox™ heavy-duty greases, Krytox™ oil Weld Point, kg 400 620 None None — provides adequate EP protection as an oil by itself, due *ASTM D2596, Measurement of extreme pressure properties of lubricating grease, four to the viscosity build under load and its unique tribo- ball method . chemistry . **These samples maxed the load limit of the test apparatus, and a load wear index cannot be determined . A common test for analyzing EP performance is the Krytox™ Properties Timken EP method, ASTM D2509 . The test is performed by applying pressure between a rotating steel cup and Composition a steel block and simulates line contact conditions . Two Oil conditions are observed; the OK Load is the highest Krytox™ fluorinated oils are a series of low molecular load at which no seizing or welding occurs, and it also weight fluorine end-capped homopolymers of reflects the load-carrying capability of the lubricant . The hexafluoropropylene epoxide with the following chemical Score Load is the lowest load at which seizing or welding structure: is observed . The scar width, which is the average scar width at the load corresponding to the OK load valve, is also recorded . The Timken EP results for various
Recommended publications
  • Tape-Unyte High Density Ptfe Tape

    Tape-Unyte High Density Ptfe Tape

    TAPE-UNYTE® HIGH DENSITY PTFE TAPE T-TAPE-SPEC PRODUCT DESCRIPTION COLOR/CONSISTENCY TENSILE STRENGTH - LONGITUDINAL 3000 PSI max - ASTM D882 (mod) PRODUCT The tape is white in color. It shall be free of visible voids, cracks, folds, ELONGATION TAPE-UNYTE® High Density PTFE Tape contamination and has consistent physical properties. TAPE-UNYTE® has an 50% min - ASTM D882 (mod) TYPE indefinite shelf life. THICKNESS ® TAPE-UNYTE is a heavy duty, all TEMPERATURE RANGE USE purpose, non-seizing, PTFE thread sealing .0040 ± .0005 Inches - ASTM D374-42 -A compound in tape form that produces a Gases: PACKAGING leakproof seal on all types of metal and -450EF (-268EC) to 500EF (260EC) plastic threaded connections. TAPE- UNYTE® is a high density, 4 MIL PTFE Liquids: U.S. Measure: (polytetrafluoroethylene) Tape supplied on -450EF (-268EC) to 500EF (260EC) finished spools. Stock Code Size PRESSURE RANGE USE F520 ¼" x 520" (.63 cm x 13.2 m) RECOMMENDED USES T260 ½" x 260" (1.27 cm x 6.6 m) Gases: T520 ½” x 520" (1.27 cm x 13.2 m) TAPE-UNYTE® will not transfer any taste up to 10,000 PSI (1450 kPa) T1296 ½” x 1296" (1.27 cm x 32.9 m) or odor to the system being sealed. Liquids: W260 ¾" x 260" (1.9 cm x 6.6 m) Excellent for food and water systems. up to 3,000 PSI (435 kPa) W520 ¾" x 520" (1.9 cm x 13.2 m) TAPE-UNYTE® will never harden, and is an X260 1" x 260" (1.9 cm x 6.6 m) anti-galling tape making it possible to The system may be pressurized disassemble pipes and bolts easily after immediately after assembly.
  • DUPONT DATA BOOK SCIENCE-BASED SOLUTIONS Dupont Investor Relations Contents 1 Dupont Overview

    DUPONT DATA BOOK SCIENCE-BASED SOLUTIONS Dupont Investor Relations Contents 1 Dupont Overview

    DUPONT DATA BOOK SCIENCE-BASED SOLUTIONS DuPont Investor Relations Contents 1 DuPont Overview 2 Corporate Financial Data Consolidated Income Statements Greg Friedman Tim Johnson Jennifer Driscoll Consolidated Balance Sheets Vice President Director Director Consolidated Statements of Cash Flows (302) 999-5504 (515) 535-2177 (302) 999-5510 6 DuPont Science & Technology 8 Business Segments Agriculture Electronics & Communications Industrial Biosciences Nutrition & Health Performance Materials Ann Giancristoforo Pat Esham Manager Specialist Safety & Protection (302) 999-5511 (302) 999-5513 20 Corporate Financial Data Segment Information The DuPont Data Book has been prepared to assist financial analysts, portfolio managers and others in Selected Additional Data understanding and evaluating the company. This book presents graphics, tabular and other statistical data about the consolidated company and its business segments. Inside Back Cover Forward-Looking Statements Board of Directors and This Data Book contains forward-looking statements which may be identified by their use of words like “plans,” “expects,” “will,” “believes,” “intends,” “estimates,” “anticipates” or other words of similar meaning. All DuPont Senior Leadership statements that address expectations or projections about the future, including statements about the company’s strategy for growth, product development, regulatory approval, market position, anticipated benefits of recent acquisitions, timing of anticipated benefits from restructuring actions, outcome of contingencies, such as litigation and environmental matters, expenditures and financial results, are forward looking statements. Forward-looking statements are not guarantees of future performance and are based on certain assumptions and expectations of future events which may not be realized. Forward-looking statements also involve risks and uncertainties, many of which are beyond the company’s control.
  • Biodiesel Handling and Use Guide (Fifth Edition)

    Biodiesel Handling and Use Guide (Fifth Edition)

    Biodiesel Handling and Use Guide (Fifth Edition) DOE/GO-102016-4875 November 2016 Disclaimer This report was prepared as an account of work sponsored by an agency of the United States government. Neither the United States government nor any agency thereof, nor any of their employees, makes any warranty, express or implied, or assumes any legal liability or responsibility for the accuracy, completeness, or usefulness of any information, apparatus, product, or process disclosed, or represents that its use would not infringe privately owned rights. Reference herein to any specific commercial product, process, or service by trade name, trademark, manufacturer, or otherwise does not necessarily constitute or imply its endorsement, recommendation, or favoring by the United States government or any agen- cy thereof. The views and opinions of authors expressed herein do not necessarily state or reflect those of the United States government or any agency thereof. Every effort has been made to ensure that this manual is accurate, complete, and compre- hensive at the time of publication. It is intended to be used as a guide and resource docu- ment. The authors strongly encourage all parties with an interest in establishing E85 or other ethanol blends fueling systems to engage professional support during installation to ensure fuel integrity and systems compatibility. This document is not intended for use as a “how to” guide for individuals or organizations performing conversions. Report Contributors and Roles Lead Authors Teresa L. Alleman and Robert L. McCormick, National Renewable Energy Laboratory Contributing Authors Earl D. Christensen, Gina Fioroni, and Kristi Moriarty, National Renewable Energy Laboratory Janet Yanowitz, EcoEngineering Contents Introduction............................................................
  • Attachment C

    Attachment C

    ATTACHMENT C C-1 ATTACHMENT C DIVISION 1 - GENERAL REQUIREMENTS 01110 JBR Summary of Work 1:4 01116 JBR Project Manual Language 1:2 01140 JBR Work Restrictions 1:8 01201 JBR Payment Procedures 1:2 01292 JBR Schedule of Values 1:4 01294 JBR Applications for Payment 1:2 01312 JBR Project Meetings 1:4 01324A JBR Progress Schedules and Reports 1:14 01329 JBR Safety Plan 1:2 01330 JBR Submittal Procedures 1:8 01350 JBR Special Procedures 1:2 01352 JBR Alteration Project Procedures 1:4 01354 JBR Hazardous Material Procedures 1:2 01424 JBR Abbreviations 1:8 01450 JBR Quality Control 1:6 01455 JDS Special Tests and Inspections 1:6 01500 JBR Temporary Facilities and Controls 1:6 01600 JBR Product Requirements 1:4 01612 JDS Seismic Design Criteria 1:2 01614 JDS Wind Design Criteria 1:2 01722 JBR Field Engineering 1:2 01732 JBR Cutting and Patching 1:4 01734 JBR Work Within Public Right-of-Way 1:2 01738 JBR Selective Demolition 1:4 01756 JBR Testing, Training, and Facility Start-Up 1:14 01770 JBR Closeout Procedures 1:6 01782 JBR Operation and Maintenance Data 1:4 C-2 ATTACHMENT C DIVISION 2 - SITE CONSTRUCTION 02084 JBR Utility Structures 1:4 02100 JBR Traffic Control 1:6 02200 JBR Site Preparation 1:4 02222 JBR Demolition 1:2 02240 JBR Dewatering 1:4 02260 JDS Excavation Support and Protection 1:6 02280 JBR Subsurface Utility Engineering 1:4 02300 JDS Earthwork 1:12 02318 JBR Trenching 1:6 02550 JBR Temporary Bypass Pumping 1:8 02580 JBR Concrete Manholes 1:2 02581 JBR Electrical Manholes 1:2 02722 JBR Aggregate Base Course 1:2 02742 JBR Asphaltic
  • 2 0 0 1 a N N U a L R E P O

    2 0 0 1 a N N U a L R E P O

    2001 ANNUAL REPORT DuPont at 200 In 2002, DuPont celebrates its 200th anniversary. The company that began as a small, family firm on the banks of Delaware’s Brandywine River is today a global enterprise operating in 70 countries around the world. From a manufacturer of one main product – black powder for guns and blasting – DuPont grew through a remarkable series of scientific leaps into a supplier of some of the world’s most advanced materials, services and technologies. Much of what we take for granted in the look, feel, and utility of modern life was brought to the marketplace as a result of DuPont discoveries, the genius of DuPont scientists and engineers, and the hard work of DuPont employees in plants and offices, year in and year out. Along the way, there have been some exceptional constants. The company’s core values of safety, health and the environment, ethics, and respect for people have evolved to meet the challenges and opportunities of each era, but as they are lived today they would be easily recognizable to our founder. The central role of science as the means for gaining competitive advantage and creating value for customers and shareholders has been consistent. It would be familiar to any employee plucked at random from any decade of the company’s existence. Yet nothing has contributed more to the success of DuPont than its ability to transform itself in order to grow. Whether moving into high explosives in the latter 19th century, into chemicals and polymers in the 20th century, or into biotechnology and other integrated sciences today, DuPont has always embraced change as a means to grow.
  • 2016 Soy Products Guide Soynewuses.Org / Thinksoy.Com the Use of Soybean Derivatives in Manufacturing Isn’T New

    2016 Soy Products Guide Soynewuses.Org / Thinksoy.Com the Use of Soybean Derivatives in Manufacturing Isn’T New

    2016 Soy Products Guide SoyNewUses.org / ThinkSoy.com The use of soybean derivatives in manufacturing isn’t new. In fact, Henry Ford and George Washington Carver shared a vision in using soybean and other natural derivatives to make plastics, paint, fuel and other products. In 1942, Ford built a car with a plastic body made from soybeans and posed in front of it in a suit made of soy-based fiber. The United Soybean Board (USB) is carrying on this vision by supporting innovative soy-based research for new product development. Since the mid-1990s this ongoing research has led to the development and manufacture of more than 800 products that contain soy, including soy- based spray foam insulation; plastic composites for cars, boats and agricultural equipment; paint; ink; and wood adhesives used in plywood, hardwood and particleboard. The list grows every year with new products. As global demand for fuels, fiber and material continues to climb, soy-based products and feedstock provide smart, sustainable alternatives to petrochemical-based products. With equal, or better performance, and lower environmental impact, soy-based products make it easy to go green. Think of all the ways you can save when you Think Soy. The use of soybean derivatives in manufacturing isn’t new. In fact, Henry Ford and George Washington Carver shared a vision in using soybean and other natural derivatives to make plastics, paint, fuel and other products. In 1942, Ford built a car with a plastic body made from soybeans and posed in front of it in a suit made of soy-based fiber.
  • Dupont™ Zytel® Product Guide and Properties

    Dupont™ Zytel® Product Guide and Properties

    DuPont™ Zytel® nylon resin Product guide and properties 1 2 4 3 ® Registered trademarks of E.I. du Pont de Nemours and Company The miracles of science™ is a trademark of E.I. du Pont de Nemours and Company ST801 16 Toughness-Stiffness Ratio of various ZYTEL® resins compared to ZYTEL® 101L 14 490 12 10 Toughened ZYTEL® 1) ® Toughened glass reinforced ZYTEL ® Toughness 8 Glass reinforced ZYTEL 6 408 80G33 4 450 80G25 70G43 80G14 114 70G35 70G503) 70G30 2 79G13 42 101 70G25 70G20 151 135 0 246 8 101214 Stiffness2) 1) Notched Izod impact, DAM 2) Flexural modulus, 50% RH 3) Preliminary data 5 Photographs 1 – Residual circuit breaker – glass-mineral reinforced 2 – Air intake manifold – glass reinforced 3 – Sole for cycling shoes – glass reinforced 6 4 – Flat filter housing – glass reinforced 5 – Resonator – glass reinforced 6 – Hedge-trimmer housing – glass reinforced 2 DuPont™ Zytel® nylon resin Properties of ZYTEL® HTN resins are given in the bro- chure “ZYTEL® HTN – Product guide and properties”. Introduction Mineral and mineral/glass reinforced nylons are also ZYTEL® is DuPont’s registered trademark for its com- available under the MINLON® trademark. Information prehensive range of nylon resins. Since the invention on these products is given in the brochure “MINLON® – of nylon by DuPont in the 1930s, it has become the Product guide and properties”. most widely used of all engineering polymers. Due to their excellent balance of properties, nylon components Data (produced by injection moulding, extrusion or blow All data in this brochure is taken from Campus version moulding) find extensive use in many applications 4.0 (measured according to ISO standards), except including: automotive, electrical/electronic, domestic where otherwise specified.
  • Candidats Potentiels

    Candidats Potentiels

    Polymères possédant un bon potentiel afin de répondre à l’application de RDDC - Valcartier Contrat: W7701 – 4501411762 Titre: Sélection de polymères Dr. AutoritéFrédéric Byette technique: Emmanuela Diaz, Scientifique de la Défense Prof. Christian Pellerin Université de Montréal, Juillet 2016 DRDC-RDDC-2017-C020 Table des matières Fluorinated ethylene propylene copolymer / FEP (p.3) Perfluoroalkoxy alkane / PFA (p.6) Poly(ethene-co-tetrafluoroethylene) / ETFE (p.9) Poly(tetrafluoroethylene) / PTFE (p.12) Poly(vinylidene fluoride) / PVdF (p.15) Polybutylene terephthalate / PBT (p.17) Polyethylene terephthalate / PET (p.20) Polytrimethylene terephthalate / PTT (p.25) Polyphenylene sulfide / PPS (p.27) Polycarbonate / PC (p.29) Polyoxymethylene / POM (p.32) Polypropylene isotactique / iPP (p.34) Polycaprolactone / PCL (p.37) Polypivalolactone / PPVL (p.38) Nylon 6 (p.40) Nylon 6,6 (p.42) Poly para aramid (p.44) 2 &! )+#2$-'*!&,, 1$&(*'(1$&'('$1%* %#&%&# #,'% 2 #2 '+,$'&<$'& G %'-*+E-('&,H #$%6 #!2+%!@*!+,$$!& %%,%#4=:E%?:E2-!G*6+!+,&, "-+)-B3@ORMY? !%!,'(6*,!'&&$$XNRM@OMMY<%X OSMYH #,#% 2&XN?PQQ ,$$%%*5&%*5&%,2-! $$#, 5%,#-%8;<::7B::4;6;<3?7B3=F92-! !%#42 Indice de Bande Coefficient réfraction (cm-1) d'absorption FEP 1.344 1147 0.535 P Spectres polarisés réflexion spéculaire (indice d’absorption k après transformation de Kramers-Kronig): Ratio d’étirement approximatif = 350% Spectres de réflectance avant et après incubation 24 h à T = 50°C suite à l’étirement: 4 Estimation du DOLP: Bande (cm-1) DOLP FEP 1147 -0.57 Notes et commentaires: Produit similaire au Teflon PTFE, cependant plus souple et donc plus facile à étirer. Très similaire au PFA. Le DOLP est peu affecté suite à l’incubation 24 h à 50°C.
  • Birla High School Girls' Section Kolkata, India

    Birla High School Girls' Section Kolkata, India

    ARSHIA Birla High School Girls’ Section Kolkata, india 18th Annual International Space Settlement Design Competition Proposing Team Data 2011 Name of responsible teacher/advisor: _Mrs. Ratna Biswas_________________________ School (or other Group Name): _Birla High School Girls’ Section_______________ School Address: _7&8 Moira Street___________________________ School City, State, Zip or Postal Code: _Kolkata 700017 (West Bengal)_______________ Country: _India____________________________________ Daytime Telephone at School: _+91-33-22879006__________________________ Message Telephone: _+91-9830332514__________________________ Fax: _+91-33-2287900___________________________ e-mail address: [email protected]____________________ Last day of school in Spring 2011: _13th May, 2011____________________________ Contact information for responsible teacher/advisor when school is not in session: Name if different from above: _Same as above____________________________ Address: _Dr. K Bannerjee Sarani______________________ City, State, Zip or Postal Code: _Kolkata 700125 (West Bengal)________________ Country: _India_____________________________________ Telephone (also evenings / weekends): _+91-9830332514___________________________ e-mail address: [email protected]__________________ Information for alternate contact person (may be a student): _Neha Jain_________________________ Telephone ___day ___eve ___weekend: _+919836811151_____________________ e-mail address: [email protected]____________________ Names, [grade levels], and (ages)
  • ELMER KEISER BOLTON June 23, 1886-Jidy 30, 1968

    ELMER KEISER BOLTON June 23, 1886-Jidy 30, 1968

    NATIONAL ACADEMY OF SCIENCES E LMER KEISER BOLTON 1886—1968 A Biographical Memoir by RO BE R T M. J O Y C E Any opinions expressed in this memoir are those of the author(s) and do not necessarily reflect the views of the National Academy of Sciences. Biographical Memoir COPYRIGHT 1983 NATIONAL ACADEMY OF SCIENCES WASHINGTON D.C. ELMER KEISER BOLTON June 23, 1886-Jidy 30, 1968 BY ROBERT M. JOYCE LMER KEISER BOLTON was one of the outstanding leaders E of industrial research. He became an industrial re- search director at a time when research was only beginning to be a significant factor in the chemical industry. There were no models for this new role, and Bolton's concepts of direct- ing industrial research were in large measure those that he formulated himself, reflecting his vision and drive to achieve important commercial goals. The record of industrial products developed by Du Pont research organizations that he directed is impressive; it in- cludes synthetic dyes and intermediates, flotation chemicals, rubber chemicals, neoprene synthetic rubber, nylon synthetic fiber, and Teflon® polytetrafluoroethylene resin. His leader- ship in bringing these developments to fruition was always apparent to management and to those he directed, but be- cause of his characteristic self-effacement his name is not widely associated with these accomplishments. Throughout his career he supported and encouraged his technical person- nel. Most important, he had the knack of picking the right time and direction to take in moving a research lead into development. Many of his decisions proved crucial to the ultimate success of these ventures.
  • Dupont™ Zytel® and Minlon® Nylon Resins Molding Guide Table of Contents

    Dupont™ Zytel® and Minlon® Nylon Resins Molding Guide Table of Contents

    DUPONT™ ZYTEL® AND MINLON® NYLON RESINS MOLDING GUIDE TABLE OF CONTENTS 1. PROCESSING GUIDELINE SUMMARY .................................1 8. MOLDING PARAMETERS ....................................................16 Drying Considerations ..........................................................1 Melt and Cylinder Temperature ...........................................16 Mold Temperatures ...............................................................1 Interruptions .......................................................................16 Shrinkage Considerations .....................................................1 Nozzle Temperature ............................................................17 Melt Temperatures................................................................1 Cavity Temperature .............................................................17 Operating Conditions ............................................................2 Injection Phase–Speed and Pressure .................................18 Dynamic Pressure Drop (DPD) ...........................................19 2. SAFE HANDLING INFORMATION .........................................2 Pack or Hold Pressure Phase..............................................19 Safety Precautions................................................................2 Hold Pressure Time (HPT) ..............................................20 Regrinding Operation ...........................................................3 Cooling Time .......................................................................20
  • Ball Valve Seat/Seal Materials and Service Applications

    Ball Valve Seat/Seal Materials and Service Applications

    APPLICATIONS - VALVE SOFT SEAT/SEAL MATERIALS One of the most important factors affecting shutoff capability is the nature of media being handled. Service life is affected by all of the following factors: - pressure, temperature, degree of pressure fluctuation and thermal fluctuation, type of media, cycling frequency, velocity of media & speed of valve operation. The following seat & seal materials can be used in various valves such as ball, plug, butterfly, needle, etc. BUNA-N (HYCAR or Nitrile) - Buna-N is a general-purpose polymer which has good resistance to oil, water, solvents and hydraulic fluids. It also displays good compression, abrasion resistance, and tensile strength. This material performs extremely well in process areas where paraffin base materials, fatty acids, oils, alcohols or glycerins are present, since it is totally unaffected. It should not be used around high polar solvents (acetones, ketones), chlorinated hydrocarbons, ozone or nitro hydrocarbons. Temperature range is 107°C maximum. Hycar is black in colour and should not be used where discolouration cannot be tolerated. It is regarded as a comparable replacement neoprene. Major differences are: Buna-N has a higher temperature limit; neoprene is more resistant to oils. EPDM - EPDM is a terpolymer elastomer made from ethylene-propylene diene monomer. EPDM has good abrasion and tear resistance and offers excellent chemical resistance to a variety of acids and alkalines. It is susceptible to attacks by oils and is not recommended for applications involving petroleum oils, strong acids, or strong alkalines. EPDM should not be used on compressed air lines. It has exceptionally good weather aging and ozone resistance.