Polyurethane Casting Primer: 1st Edition (Paperback) book cover

Polyurethane Casting Primer

1st Edition

By I.R. Clemitson

CRC Press

326 pages | 98 B/W Illus.

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Paperback: 9781439879214
pub: 2011-12-19
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pub: 2017-11-15
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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

Reviews

… a hands-on, practical approach to castable polyurethane compounds … very user-friendly.

—Michael Szycher, Sterling Biomedical, Lynnfield, Massachusetts, USA

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

About the Author

Author

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).

Subject Categories

BISAC Subject Codes/Headings:
TEC021000
TECHNOLOGY & ENGINEERING / Material Science
TEC055000
TECHNOLOGY & ENGINEERING / Textiles & Polymers