METHOD FOR DISTINGUISHING THE LEVEL OF MONOFUNCTIONAL AMINOSILOXANE IN AMINO SILICONE OIL
Original Publication Date: 1996-Aug-31
Included in the Prior Art Database: 2004-Apr-07
Xerox Disclosure Journal
Disclosed is a method for distinguishing the level of monofunctional aminosiloxane in amino silicone oiL Amino siloxanes have been shown to crosslink latex fluoroelastomers as long as the aminosiloxanes have at least two amino groups per siloxane molecule. It is proposed to make use of this chemistry as an analytical tool for determining the level of multifunctionality of a particular amino oil sample. Using measured amounts of latex fluoroelastomer and an unknown amino silicone component, a mixture of the two is made and well blended. Any monofunctional aminosiloxanes present will not crosslink with the fluoroelastomer while di-substituted or plurally substituted amino siloxanes will crosslink with the fluoroelastomer. The crosslinked fluoroelastomer will come out of solution and hence will be qualitatively indicative of the level of amino multifunctionality within the aminosiloxane sample. A quantitative comparison of the amount of crosslinked fluoroelastomer formed by the aminosiloxane of unknown functionality vs. that formed by a known amount of, for example, a reference amino silicon such as , diarninosiloxane can be made. A similar experiment can be done using an organic solution of fluoroelastomer as long as the solvent is a good one for both the fluoroelastomer and the aminosiloxane.