Abstract:
AN IMPROVED GREASE COMPOSITION IS DISCLOSED COMPRISING A MAJOR PORTION OF A LUBRICATING OIL C ONTAINING A POLYUREA METAL SALT WHEREIN THE POLYUREA PORTION OF THE MOLECULE IS PREPARED BY REACTING A DILSOYANATE, A DIAMINE WITH A MONOISOCYANATE OR MONOAMINE. THE METAL SALT IS PREPARED BY REACTING THE POLYUREA COMPOUND WITH AN ACID GROUP, SUCH AS A CARBOXYLIC OR A SULFONIC ACID GROUP, AND NEUTRALIZING THE TERMINAL ACID GROUP WITH A BASIC METAL COMPOUND.
Abstract:
A process is disclosed for making ultrasonic inspections of high surface temperature objects by using a polymeric material as a couplant. The polymeric materials are specifically defined in terms of thermal characteristics. Surface temperatures of the object at the point of inspection may be 300* - 1,100* F. or higher.
Abstract:
1. A GREASE COMPOSITION COMPRISING A MAJOR PORTION OF A LUBRICATING OIL AND MINOR GREASE THICKENING PORTIONS OF (1) AN ALKALI OR ALKALINE EARTH METAL SALT OF A POLYUREA SULFONATE OR CARBOXYLATE COMPOUND HAVING AT LEAST 2 UREIDO GROUPS AND HAVING A MOLECULAR WEIGHT BETWEEN ABOUT 250 AND 2500 AND (2) AN ALKALINE EARTH METAL ALIPHATIC MONOCARBOXYLATE HAVING FROM 1 TO 3 CARBONS.
Abstract:
An apparatus is disclosed for making ultrasonic inspections of high surface temperature objects by using as a couplant a polymeric material of polysulfone or polyester resin having specifically defined thermal characteristics. Surface temperatures of the object at the point of inspection may be 300* - 1,100* F. or higher.