By Arthur H. Landrock
This booklet is meant to be a resource of functional info on all kinds of plastic foams (cellular plastics) in use, together with the hot structural plastic foams. Elastomer (rubber-like) foams also are thought of. The booklet is meant essentially in the event you require a non-theoretical, authoritative, easy-to-use guide within the topic zone. it's going to be of worth to fabrics engineers, plastics fabricators, chemists, chemical engineers and scholars. famous gurus have written a number of chapters and elements of chapters of their fields of workmanship. The ebook is geared up in this sort of method that details on a wanted topic are available swiftly. An strange function is a complete directory of all identified standardization files (test tools, practices, and specifications), together with a few overseas criteria. each one rfile features a short description of its contents.
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Additional resources for Handbook of Plastic Foams
O-R Both methods could be recognized as a new combination of a known gas-generation and a known polymer-formation reaction. Since then, a variety of isocyanate-based foams were developed as described below. New combinations of new gas-generation reactions and a known polymer formation lie outside of the prior art. This new area was studied by Ashida and his collaborators, and the work was reviewed (33). Isocyanate-based foams include polyurethane, polyisocyanurate, polyurea, polycarbodiimide, polyamide, polyimide, and polyoxazolidone foams.
The ally1 alcohol then yields vinyl-terminated polyether monols and the presence of monols results in many problems. Hence, the maximum molecular weight available as commercial products is limited to less than 5,000. Very recently, a novel method for producing high-molecularweight polyols without the formation of the monols has been disclosed by ARC0 Chemical Co. (118, ISO), and Asahi Glass Co. (223). , Zn,[Co(CN),],~xZnCl,~y GlymezH,O. This catalyst was discovered in the 1960’s by Herold and his co-workers at the General Tire and Rubber Co.
The one-shot process is used for flexible and rigid foams. In the case of slabstock foams, the ingredients are separately supplied to the mixing head. In order to adjust viscosity and mixing accuracy, some of the ingredients, such as polyol and tin catalyst, water and amine catalyst, are pre-mixed. Two-component premix systems are widely used for different foam systems because these systems can be supplied in two kinds of drums. In addition, the machines for foam preparation can be of simple structure, and their handling and maintenance are easy.