Clemitson I.R. Polyurethane Casting Primer

Handbook. — Boca Raton, CRC Press, 2012. — 290 P.Omitting complicated chemistry concepts, Polyurethane Casting Primer presents practical details on the casting of polyurethane products to assist readers in their daily work. It covers fundamental methods, explores hands-on design and production topics, and keeps theory to a minimum.
The book fully explains casting and allied processes. Starting from a "bucket and paddle mix" open pour, postcuring machining, bonding, and painting, it discusses how to produce quality products continuously. The author describes the necessary precautions for maintaining the health and safety of workers. He covers the properties of polyurethane systems, the tests and results of polyurethanes commonly used in compression, and the correct grade and processing of polyurethanes for meeting customer requirements. He also reveals how to fix issues such as molding problems and premature end of life.
The versatility of polyurethane enables a wide range of applications, from simple, noncritical parts to vital engineering products. This book guides manufacturers in designing and producing polyurethane products.Contents
Introduction
Polyurethane Family of Plastics
Castable Polyurethanes Principles
Comparison to Other Plastics
Health and Safety
Fundamentals
Basics
Fundamental Ingredients
System
Types of Polyurethane Systems
Commercial Types
System Selection
Commercial Types of Polyurethane Systems
Processing Selection
Mixing and Casting Polyurethanes
Basic Mixing and Casting
Background to Mixing and Casting
Calculations
Adjustments to the Amount of Curative Used
Method
Curing and Postcuring
Calculations
Tables
Supplementary (Additional) Casting Processes
Thick Cross-Sections
Bonding
Finishing
Postcure Bonding
Painting
Epoxy Blends
Millable Polyurethanes
Design Considerations
Quality of Part Required
Draft and Undercuts
Shrinkages
General Considerations in Mold Design
Parts in Compression
Bonded Parts
Wheels
Standard Polyurethane PropertiesBasic Comparisons
Viscosity of Prepolymers
Pot Life of Prepolymers
Curing and Post Curing
Slow Curing
Effect of Backbone Type
Polyether Polyurethanes
Range of Values within a NCO Level
Aliphatic Polyurethanes
Testing Polyurethanes
Quality Control and Assurance TestingRaw Materials Testing
Finished Products Testing
Standard Tests for Product EvaluationPrepolymer Properties
Processing Information
Cured Polyurethane Properties
Details of Procedures
Investigations into Structural PropertiesStructure from a Material Science Point of View
Structure from an Engineering Point of View
Infrared Spectroscopy
Nuclear Magnetic Resonance (NMR)
Differential Scanning Calorimetry (DSC)
Dynamic Thermal Mechanical Analysis (DTMA)
Thermal Gravimetric Analysis (TGA)
Scanning Electron Microscopy (SEM)
Atomic Force Microscopy (AFM)
Small-Angle X-Ray Scattering (SAXS)
Endnotes
Chemical ResistanceAlphabetical List of Chemicals
Suitability Listings
Polyurethanes under LoadDeformation Relationships
Stress
Shear
Compression Set
FlopsEarly Detection
Molding Problems
Problems on Demolding
Potential Problems
Returns from Customer
Premature End of Life
Health and Safety
Isocyanate Vapors
Curatives
Catalysts
General Chemicals
Material Safety Data Sheets (MSDSs)
Heat
Electrical Equipment
Compressed Gas Lines
Handling Tools, Materials, and Equipment
Glossary
Suggested Further Reading
Appendix