Epoxy and urethane calculations crosslink technology inc. The author presents very valuable detailed information on foam manufacturing based on more than 40 years handson experience in the local and international situations. Drawing attention to novel raw materials, alternative blowing agents, and new processing methods, the book accentuates recent innovations that meet increasingly stringent. Preparation of laboratoryscale polyurethane foams is described with formulations that are easy to implement in experiments for undergraduate students. It contains a fully updated description of the chemistry, raw materials, manufacturing, formulations, analyses, and testing involved in producing a wide variety of progressive applications, including building materials. New applications are being constantly identified and the product range will be further development. This is a completely updated version of the book polyurethanes for coatings published in 1999.
Polyurethane polymers have traditionally exhibited high toughness and versatility in coating, adhesive, sealant and elastomer case applications. This new edition of a bestseller is an invaluable reference for technologists, marketers, suppliers, and. This book is written for processors and users of polyurethanes. Polyurethane pur and pu is a polymer composed of organic units joined by carbamate urethane links. Polyurethane chemistry is complex, but the basics are relatively easy to understand. A practical handbook rather than merely a chemistry reference, szychers handbook of polyurethanes, second edition offers an easytofollow compilation of. A complete overview of a key plastic one of the most versatile polymer materials, polyurethanes have a unique chemical nature that allows for shaping and molding to fit all sorts of consumer and industrial products seat cushions, carpets, insulation, coatings, and refrigerators to name a few. Characterized by a very low viscosity compared to other hdi polyisocyanates, desmodur n3400 is usually used in blends with the other hdi polyisocyanates in formulating higher solids polyurethane coatings. Segura purtechnology centre of excellence, wolfson school of mechanical and manufacturing engineering, loughborough university, loughborough, leicestershire, le11 3tu, uk diana segura received her bsc 2002 in chemical engineering. Polyurethanes are formed by reacting a polyol an alcohol with more than two reactive hydroxyl groups per molecule with a diisocyanate or a polymeric isocyanate in the presence of suitable catalysts and additives. The physical properties, as well as the chemical structure, of a polyurethane depend on the structure of the original reactants, in particular the r 1 and the r 2 groups. The polyurethanes book by david randall, 9780470850411, available at book depository with free delivery worldwide. Flexible and viscoelastic polyurethane foams have enormous potential as viable business ventures and have replaced many traditional materials used in everyday life. Since the first polyurethanes book was published in 1987, and reprinted with updates in 1990, the world of polyurethanes has changed dramatically.
How can i calculate the molar ratio for the components of. Its concerntration is measured by weight percent nco. This allows students to develop alternative formulations to the ones given in the experimental procedure. This new edition of a bestseller is an invaluable reference for. It is the essential part of the polyurethane molecule. The first of these is the subject of the latest rapra handbook. The graphene, polyurethane pu, calcium carbonate cc, and absorption of cc in graphenepu composite, respectively, were studied using theoretical calculations like gibbs free energy, log p, fourier transform infrared ftir, and electrostatic potential. The polyol is a trihydroxy compound and therefore has an f of 3 while the diidsocyanate and chain extender have fs. It covers the chemistry and technology of oligopolyol fabrication, the characteristics of the various oligopolyol families and the. The world of polyurethanes polyurethanes in a changing world market the complex technology of polyurethanes.
I was guided with this book thoughout my polyurethane researches in the following 10 years. This edition has been completely restructured, rewritten and enlarged by approximately 50%. With an active marketplace of over 175 million items, use the alibris advanced search page to find any item you are looking for through the advanced search, you can find items by searching specific terms such as title, artist, song title, genre, etc or you can narrow your focus using our amazing set of criteria parameters. Jan 12, 2010 preparation of laboratoryscale polyurethane foams is described with formulations that are easy to implement in experiments for undergraduate students. The author also presents very valuable detailed information on foam manufacturing, based on over 40 years handson experience in both the local and international scenes. If you use a twostep synthesis, first you prepare the isocyanate endcapped polyol. This allows students to develop alternative formulations to the ones. This book imparts a sound knowledge of flexible and viscoelastic polyurethane foams from its chemistry to calculations and formulating methodology for quality. The versatility of polyurethane enables a wide range of applications, from simple, noncritical parts to vital engineering products. This book describes the chemistry of flexible and viscoelastic polyurethane foams as well as calculations and formulating methodology for quality production. Polyurethane handbook download ebook pdf, epub, tuebl, mobi. Chapter 3 chemistry of polyurethane adhesives and sealants. Desmodur n3400 polyisocyanate is a blend of the trimer figure 14 and uretdione figure 16 of hdi.
Dow polyurethanes foam preparation calculations dow answer. Hundreds of practical formulations discussion of the polyurethane history, key terms, and commercial importance an indepth survey of patent literature useful stoichiometric calculations the latest green chemistry applications a complete assessment of medicalgrade polyurethane technology not. A guide to formulating polyurethane dispersions for use in. Dec 11, 1985 this uptodate, authoritative handbook and reference work covers all aspects of polyurethane product research and development, processing technology and applications, economy, and ecology. A practical handbook rather than merely a chemistry reference, szychers handbook of polyurethanes, second edition offers an easytofollow compilation of crucial new information on polyurethane technology, which is irreplaceable in a wide range of applications. This book guides manufacturers in designing and producing polyurethane products.
Despite its popular uses, polyurethane science has only relatively recently achieved. Chemistry and technology is an indepth examination of the current preparation, processing, and applications of polyurethanes purs and other polymer foams. Yntegra polyurethane dispersions are high solids dispersions of polyurethane polyurea polymers in water. Resin and hardener required for an amount of mix quantity. It provides a greater focus on the whole range of components used to produce polyurethanes, a more detailed analysis of environmental issues and extended.
About this book introduction the aim of this monograph has been to distil into a single volume, in an easily read and assimilated format, the essentials of this often complex technology such that it is usable by all technical and semitechnical people who wish to become their own polyurethane and polyurethane elastomer expert. Describe the calculations used in the preparation of polyurethane foams. With over 50 years of industry experience, our broad and versatile product portfolio of isocyanates, polyols, polyurethane additives and surfactants as well as polyurethane systems allow fast cure, excellent flexibility, superior bond strength and much more. Because a variety of diisocyanates and a wide range of polyols can be. Polyurethane chemistry is of great significance in many applications worldwide. Szychers handbook of polyurethanes 2nd edition michael. A guide to formulating polyurethane dispersions for use in coating, adhesive, sealant and elastomer applications. The use of polyurethane composites in automotive applications.
Moreover, their development potential has yet to be exhausted by any means. Chemistry, industrial chemistry, paints, pigments, coatings and dyes, inorganic pigments book, industrial inorganic,polyurethanes book saturday, september 14, 20 since the first polyurethanes book was published in 1987, and reprinted with updates in 1990, the world of polyurethanes has changed dramatically. It provides a greater focus on the whole range of components used to produce polyurethanes, a more detailed analysis of environmental issues. This new edition of a bestseller is an invaluable reference for technologists, marketers, suppliers, and academicians who require cuttingedge, commercially valuable data on the most advanced uses for polyurethane, one of the most. This is a book that can be used either as a textbook or as a reference book on your desk. No other work gives a more comprehensive overview of the current state of the art. This new edition of a bestseller is an invaluable reference for technologists. How can i calculate the molar ratio for the components of a. Jul, 2012 a practical handbook rather than merely a chemistry reference, szychers handbook of polyurethanes, second edition offers an easytofollow compilation of crucial new information on polyurethane technology, which is irreplaceable in a wide range of applications.
The precise formulations are known to the polyurethane processors but this information is sometimes proprietary and is. Szychers handbook of polyurethanes, second edition. It presents rich technical and historical descriptions of all major polyurethanes and updated sections on medical and biological applications. The book fully explains casting and allied processes. Drawing attention to novel raw materials, alternative blowing agents, and new processing methods, the book acc. Introduction to polyurethanes although the reaction between isocyanate and hydroxyl compounds was originally identified in the 19th century, the foundations of the polyurethanes industry were laid in the late 1930s with the discovery, by otto bayer, of the chemistry of the polyaddition reaction between diisocyanate and diols to form. Often, ester, ether, urea and aromatic rings are also present along. Chemistry, technology and properties by phillips, l n d. These features help readers better understand developmental, chemical. Introduction to polyurethanes the global polyurethanes market the lifecycle of polyurethanes product stewardship isocyanates polyols outline of polyurethane chemistry blowing agents catalysts additives introduction to flexible foams moulded foams for automotive seating, sound insulation and furniture slabstock foams. Chemistry and technology of polyols for polyurethanes. Twocomponent polyurethane systems innovative processing. How to calculate the molar ratio for the components of a. Download pdf catalysts and surfactants in polyurethane.
This book imparts a sound knowledge of flexible and viscoelastic polyurethane foams from its chemistry to calculations and formulating methodology for quality production. Furthermore, the relative amounts of the precursors that have to be combined to produce a specific polyurethane product are usually tailored to the type of product and to the production process. I started to read this book in 1989 and used the knowledge in this book when i conducted laboratory research on polyurethanes a year later. Despite its popular uses, polyurethane science has only relatively recently achieved appreciation.
Szychers handbook of polyurethanes routledge handbooks online. The group formed by the reaction between the two molecules is known as the urethane linkage. Drawing attention to novel raw materials, alternative blowing agents, and new processing methods, the book accentuates recent innovations that meet increasingly. The main raw materials used for the production of polyurethanes are polyols, isocyanates and propylene oxide.
Particular attention is given to formulation aspects that are based on the main chemical reactions occurring in polyurethane production. This new edition of a bestseller is an invaluable reference for technologists, marketers. The latter half of the book focuses on polyurethane foams, the largest segment of the polyisocyanatebased foam industry. While most polyurethanes are thermosetting polymers that do not melt when heated, thermoplastic polyurethanes are also available polyurethane polymers are traditionally and most commonly formed by reacting a di or triisocyanate with a polyol. They provide the performance of a polyurethane and the convenience of a waterborne latex. This uptodate, authoritative handbook and reference work covers all aspects of polyurethane product research and development, processing technology and applications, economy, and ecology. It covers fundamental methods, explores handson design and production topics, and keeps theory to a minimum. Szychers handbook of polyurethanes routledge handbooks. This book considers the raw materials used to build the polyurethane polymeric architecture. Parker and a great selection of related books, art and collectibles available now at. This listing may be handwritten in a databook, handwritten on a foam machine run. Omitting complicated chemistry concepts, polyurethane casting primer presents practical details on the casting of polyurethane products to assist readers in their daily work.
A subscription is required to access the full text content of this book. Calculate the amount of hardener required for a given amount of resin. Dec 19, 2011 omitting complicated chemistry concepts, polyurethane casting primer presents practical details on the casting of polyurethane products to assist readers in their daily work. This book gives practical guidance on the selection of raw materials and machinery, as well as the calculations and formulations necessary for the successful production and. Chemistry and technology of polyols for polyurethane. Since the first polyurethanes book was published in 1987, and reprinted with updates. Buy practical guide to flexible polyurethane foams book. The polyol is a trihydroxy compound and therefore has an f of 3 while the diidsocyanate and chain extender have fs of two as each has two.
The first commercial applications of polyurethane polymers, for millable elastomers, coatings and adhesives, were developed between 1945 and 1947, followed by flexible foams in 1953 and rigid foams in 1957. Ftir spectroscopy reveals information about the molecular interactions of chemical. Raw materials pu are formed by chemical reaction between a dipoly isocyanate and a diol or polyol, forming repeating urethane groups, generally, in presence of a chain extender, catalyst, andor other additives. Pharos is a tool to help scientists, researchers, and product innovators identify problematic chemicals and collaborate to find safer alternatives. F is the number of reactive groups per mole of compound. This book imparts a sound knowledge of flexible and viscoelastic polyurethane foams from their chemistry to calculations and formulating methodology for quality production.
1035 1436 77 358 443 368 977 1122 843 312 1049 1213 463 416 1038 308 975 579 108 856 796 1126 641 870 1367 1133 446 1252 453 373 955 878 518 1228 224 618 1498 537