Patent ID: 6319982
Filing Date: 2001-11-20
Classification: C08G,C08J,C08L,C09D,C09J,C09K

Abstract:
A storage stable aqueous silicone emulsion composition that cures upon drying comprising a blend of:a) one or more emulsions that collectively comprise a reactive polymer/crosslinker system comprising a compound having thereon a group of formula I:--SiR.sup.2.sub.a (OR.sup.3).sub.b Iwherein R.sup.2 is alkyl, alkoxy-substituted alkyl, aryl or aralkyl, and has 1 to 12 carbon atoms; R.sup.3 is alkyl, alkoxy-substituted alkyl, aryl, or aralkyl, and has 2 to 10 carbon atoms; a is 0 or 1; b is 2 or 3; a+b is 3;the reactive polymer/crosslinker system comprising:(i) at least one condensable polyorganosiloxane polymer of formula IV: ##STR5##where R is independently R.sup.2, OR.sup.3, or R.sup.5 ; R.sup.5 is a group of formula II:R.sup.1 --SiR.sup.2.sub.a (OR.sup.3).sub.b IIwhere R.sup.1 is a divalent organic group, w is 2+y+2z; y is 0 to 2; z is 0 to 2; y+z is 0 to 2; w +x+y+z is 2 to 30; and there are an average of at least two R.sup.5 groups per molecule; and(ii) at least one crosslinking compound, which may be the same as or different from the at least one condensable polyorganosiloxane polymer of formula IV, the crosslinking compound having a plurality of hindered alkoxy groups of the formula --OR.sup.3 thereon, where R.sup.3 is an alkyl or alkoxy-substituted alkyl, aryl or aralkyl group and has from 2 to 10 carbon atoms; andb) a separate aqueous emulsion comprising a silicone condensation catalyst.