Abstract:
The present invention comprises a curable composition comprising: (i) a blocked reactive component comprising a blocked isocyanate or a blocked isothiocyanate; (ii) a functional component containing reactive hydrogen; (iii) a triorganotin catalyst for promoting the reaction of the blocked reactive component with the functional component. The composition may also be admixed with water. A co-catalyst may also be employed based on Cu, Zn, Ni, Fe, Co, V, Sb and Bi and especially oxides, salts or chelates of said metal where said metals are divalent. The invention also relates to a method for curing a blocked isocyanate or blocked isothiocyanate at a temperature below about 150 DEG C which comprises combining a triorganotin catalyst with the blocked reactive component and functional component and heating at a temperature less than about 150 DEG C to obtain a cured urethane or thiourethane.
Abstract:
Improvements in the rate of stripping of alkaline water-in-oil emulsions by incorporating in the organic phase thereof an effective amount of pyrrole.
Abstract:
An accelerometer (10) having a piezoelectric transducer (22) which produces electrical signals in response to its deflection and comprises an elongated, continuous beam of generally flat configuration and narrow cross section to provide a bending axis which facilitates deflection of the free ends in response to shock in one or more of the linear and torsional modes. The beam is supported intermediate its ends by a mount (29), with the free ends of the beam preferably extending equidistantly in opposite directions from the mount. By laminating a single piece of piezoelectric material to a rigid substrate and forming cantilevers in each deflection direction, an accelerometer with six degrees of freedom may be formed. Also, a compressive type angular accelerometer (122) may be formed from two piezoelectric sensor elements incorporated onto a single piece of piezoelectric polymer (126).
Abstract:
Shaped, dust-free dry wire drawing compound lubricants having at least one reproducibly controlled dimension and methods for their preparation comprising the steps of conglutinating and pressure forming the lubricant composition.
Abstract:
An electrowinning process for lead incorporating a variety of alkanesulfonic acid-based electrolytes in the absence of a redox couple, is disclosed; an inert anode and a lead accepting cathode are utilized.