EFFECT OF DIISOCYANATE STRUCTURE ON LOAD-BEARING PROPERTIES OF FLEXIBLE URETHANE FOAMS

Technical Report · Fri Jan 01 04:00:00 EST 1960

OSTI ID:4058940

Peterson, C A; Smith, C H

Flexible urethane foams can be shaped, contoured, or molded to size to meet specific application requirements. Additional properties of the flexible urethane foams that make them useful in cushioning applications include: good tear strength, low temperature flexibility, low flexing fatigue, and good tensile and elongation properties. The effect of various diisocyanates upon the propenties of these foams was investigated. It was previously pointed out that the physical properties of urethane elastomers are af fected by the molecular structure of the diisocyanate used in their preparation. By analogy, it would be expected that this relationship should also apply in urethane foams. In this investigation, it was demonstrated that different diisocyanates do influence the physical properties of flexible urethane foams. The load-bearing properties of these foams are shown to be significantly influenced by the various diisocyanates or combinations of diisocyanates used in the preparation of the isocyanate prepolymers. The flexible urethane foams considered in this study are based on polyether prepolymers. Eight commercially available diisocyanates were investigated. The synthesis of the isocyanate terminated polyether prepolymers, and their use in formulating foamed materials are discussed. Particular emphasis is placed on the study of the relationship between diisocyanate configuration and load-bearing properties of the finished foams. (auth)

• Research Organization: Bendix Corp., Kansas City, Mo.
• DOE Contract Number: AT(29-1)-613
• NSA Number: NSA-15-014734
• OSTI ID: 4058940
• Report Number(s): TID-12137
• Country of Publication: United States
• Language: English

Related Subjects

BEARINGS
CARBONATES
CONFIGURATION
CYANATES
ETHYL RADICALS
FATIGUE
FOAMS
LATTICES
LOW TEMPERATURE
MECHANICAL PROPERTIES
METALS, CERAMICS, AND OTHER MATERIALS
MOLECULES
POLYMERS
PREPARATION
REACTOR FUELING
STRESSES
TENSILE PROPERTIES