Polyurethane Casting Primer  book cover
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1st Edition

Polyurethane Casting Primer





ISBN 9781439879214
Published December 19, 2011 by CRC Press
326 Pages 98 B/W Illustrations

 
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Book Description

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. Batch calculations are available for download at www.crcpress.com

Table of Contents

Introduction
Polyurethane Family of Plastics
Castable Polyurethanes
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 Properties
Introduction
Basic Comparisons
Viscosity of Prepolymers
Pot Life of Prepolymers
Curing and Postcuring
Slow Curing
Effect of Backbone Type
Polyether Urethanes
Range of Values within a NCO Level
Aliphatic Polyurethanes

Testing Polyurethanes

Quality Control and Assurance Testing
Introduction
Raw Materials Testing
Finished Products Testing

Standard Tests for Product Evaluation
Introduction
Prepolymer Properties
Processing Information
Cured Polyurethane Properties
Details of Procedures

Investigations into Structural Properties
Introduction
Structure 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)

Chemical Resistance
Introduction
Alphabetical List of Chemicals
Suitability Listings

Polyurethanes under Load
Introduction
Deformation Relationships
Stress
Shear
Compression Set

Flops
Introduction
Early 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

Appendix

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Author(s)

Biography

I.R. Clemitson worked in the chemical industry for 45 years, primarily involved with the production and development of rubbers and polyurethanes. He is a chartered member of the Royal Australian Chemical Institute (MRACI CChem).

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Author - Ian Rex Clemitson
Author

Ian Rex Clemitson

Retiree,
Yeppoon, Queensland, Australia

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Reviews

… a hands-on, practical approach to castable polyurethane compounds … very user-friendly.
—Michael Szycher, Sterling Biomedical, Lynnfield, Massachusetts, USA

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