Sizing composition for glass fibers

US6228496A · kind A · utility

Assignee

• PPG Industries Ohio, Inc. · US

Inventors

• Ernest L. Lawton · Washington, US
• Michael Gunther · Hamburg, DE
• Eric R. Pohl · Campion Road, US

Key dates

• Filing date: May 26, 1999
• Grant date: May 8, 2001
• Expiry date: May 26, 2019

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T442/20
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

The present invention provides a glass fiber strand 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; and at least one silane coupling agent comprising: [((R.sup.1).sub.b Y).sub.a R.sup.2.sub.3-a SiR.sup.3].sub.2 NX, wherein R.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; and b is 1 or 2 depending upon the valency of Y. In one particular embodiment of the invention, the silane in the aqueous sizing composition is (CH.sub.3).sub.3 COC(.dbd.O)CH.sub.2 CH.sub.2 N[CH.sub.2 CH.sub.2 CH.sub.2 Si(OCH.sub.3).sub.3 ].sub.2.