Relationships between Polyurethane Elastomer Structure and Ageing Properties: Part 4. Effect of Di-isocyanate

Abstract

The effect of varying the di-isocyanate on the aging properties of polyurethane elastomers is investigated. Polyester and polyether urethane elastomers were prepared with selected diisocyanates and crosslinked and/or chain extended. Elastomers prepared with toluene di-isocyanate gave the most satisfactory initial properties and resistance to aging in dry air at 80 C, water at 22 and 80 C, and gasoline at 65 C. None of the elastomers prepared from the di- isocyantes had equally satisfactory all round properties to those based on toluene di-isocyanate. Further disadvantage of these di-isocyanates were their extremely high or low reactivities, high cost and limited availability compared to toluene di- isocyanate. (P.S.-PL)

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Document Details

Document Type
Technical Report
Publication Date
Jun 01, 1971
Accession Number
AD0745249

Entities

People

  • B. E. Brokenbrow
  • D. Sims
  • John Wright

Tags

DTIC Thesaurus Topics

  • Chemistry
  • Curing Agents
  • Discoloration
  • Elastomers
  • Hardness
  • Hydroxyl Terminated Polybutadiene
  • Material Degradation Processes
  • Materials
  • Materials Laboratories
  • Mechanical Properties
  • Molecular Weight
  • Physical Properties
  • Resistance
  • Stress Cracking
  • Synthetic Rubber
  • Tensile Properties
  • Tensile Strength

Readers

  • Polymer Science and Engineering.