Synthesis and Evaluation of Curing Agents

Abstract

Curing agents for both carboxy and hydroxy- functional prepolymers have been investigated. Reactivity and specificity of these aziridines is also affected by the substitution on the aziridine ring. The 2,3- dimethyl aziridines exhibit the highest degree of specificity. To get satisfactory cures with the sulfonyl aziridines a catalyst is needed. Ureido and acyl 2,3- dimethyl aziridines give adequate cure rates at 150 degrees F. Mechanical properties of OH-Telagen-S gumstocks cured with di-/ triisocyanates have shown that the maximum stress, initial modulus and Shore hardness is a function of diisocyanate structure and triisocyanate level whereas the maximum strain is solely dependent on the triisocyanate level. Aging studies of OH-Telagen-S GUMSTOCKS CURED WITH DI-/TRIISOCYLANATE HAVE SHOWN THAT THE URETHANE CURE LINKAGE HAS ADEQUATE THERMAL STABILITY AT 275 DEGREES F.

Open PDF

Document Details

Document Type
Technical Report
Publication Date
May 01, 1969
Accession Number
AD0855890

Entities

People

  • A. H. Muenker
  • C. A. Rowe
  • C. Gustavson
  • J. Linsk
  • M. Lynn

Tags

DTIC Thesaurus Topics

  • Alkanes
  • Carboxylic Acids
  • Catalysts
  • Chemistry
  • Chlorides
  • Curing Agents
  • Esters
  • Hardness
  • Heat Energy
  • Hydroxides
  • Materials
  • Mechanical Properties
  • Perchlorates
  • Physical Properties
  • Tensile Properties
  • Tensile Strength
  • Thermal Stability

Readers

  • Polymer Science and Engineering.