Accession Number : ADA305008

Title :   Preparation of Urethane Adhesives. Revision.

Descriptive Note : Final rept.,

Corporate Author : ALLIED BENDIX AEROSPACE KANSAS CITY MO

Personal Author(s) : Parker, B. G. ; McFarland, J. W.

PDF Url : ADA305008

Report Date : SEP 1976

Pagination or Media Count : 19

Abstract : Both the Union Carbide Corporation and the Lawrence Livermore Laboratory (LLL) are continuing work on urethane adhesives to replace the Adiprene L-100/MOCA system (E. I. du Pont de Nemours & Company). Several alternate adhesives are in the final stages of development. Two prepolymers, Halthane 73 and Halthane 87, used in these adhesive systems, were scaled-up from laboratory synthesis to pilot plant production. Several physical properties of the prepolymers were determined. Physical properties of the prepolymers prepared in the laboratory are very similar to prepolymers prepared in the pilot plant. The shear storage modulus of the cured adhesives was measured at various temperatures. The Halthane 73 adhesives have glass transition temperatures of -30 deg to -50 deg C with almost constant shear modulus from -10 deg to 120 deg C. Halthane 87 adhesive has a lower glass transition temperature of -60 deg to -70 deg C, but does not have as constant a shear modulus at higher temperatures as tne Halthane 73 adhesive. Nineteen liter quantities of Halthane prepolymers required for additional test programs were prepared in the pilot plant and shipped to LLL. jg p7

Descriptors :   *ADHESIVES, *URETHANES, TEST AND EVALUATION, LOW TEMPERATURE, PRODUCTION, PREPARATION, SYNTHESIS, PHYSICAL PROPERTIES, POLYMERS, HIGH TEMPERATURE, SHEAR MODULUS, GLASS, TRANSITION TEMPERATURE, LABORATORIES, STORAGE, PILOT PLANTS.

Subject Categories : Adhesives, Seals and Binders
      Physical Chemistry
      Polymer Chemistry

Distribution Statement : APPROVED FOR PUBLIC RELEASE