Patent ID: 6228496
Filing Date: 2001-05-08
Classification: C03C,Y10T

Abstract:
A glass fiber strand having improved heat cleaning properties comprising at least one glass fiber at least partially coated with a sizing composition prepared from ingredients comprising;at least one starch;at least one lubricant; andat least one silane coupling agent highly susceptible to thermal decomposition, comprising:[((R.sup.1).sub.b Y).sub.a R.sup.2.sub.3 SiR.sup.3 ].sub.2 NX whereinR.sup.1 and R.sup.2 are each monovalent radials;R.sup.3 is a divalent linking group;a is 1 to 3;X is (R.sup.4).sub.b ZC(.dbd.O)CH(Q)CH(Q)--, wherein Z is CH.sub.2, O, S or N, Q is H, alkyl, aryl, alkaryl, or C(.dbd.O)ZR.sup.4 and R.sup.4 is a hydrocarbon moiety of one to twenty carbon atoms, hydrogen, a silyl group or an organic polymer;Y is oxygen, nitrogen or sulfur; andb is 1 or 2 depending upon the valency of Y;wherein the sizing composition is more easily removed from the at least one glass fiber when exposed to elevated temperatures of a heat cleaning process.