Ppg Industries Ohio, Inc.

Witco Corporation

Osi Specialties, Inc.

Michael L Gunther

Eric Raymond Pohl

Herbert E Petty

Ernest L Lawton

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: &lsqb;((R,),Y),R,SiR,NX, wherein R,and R,are each monovalent radials; R,is a divalent linking group; a is 1 to 3; X is (R,),ZC(&boxH;O)CH(Q)CH(Q)&mdash;, wherein Z is CH,, O, S or N, Q is H, alkyl, aryl, alkaryl, or C(&boxH;O)ZR,and R,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,),COC(&boxH;O)CH,CH,N&lsqb;CH,CH,CH,Si(OCH,),&rsqb;,.

Sizing composition for glass fibers

Unsaturated imidosilanes which are essentially free of siloxanes are taught herein for use surface treatments for inorganic solid materials. Novel methods to make such silanes, which do not yield water or siloxanes as a by-product are also taught. Compositions consisting essentially of imidosilane treated inorganic solid materials, resinuous materials and optionally a free radical generator, especially glass fiber reinforced composites, are taught.

Imidosilane compositions

Bis-silyl tertiary amines of the formula (I) �((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 monovalent radicals, R.sup.3 is a divalent radical, X is a monovalent carbonyl containing radical, Y is oxygen, nitrogen or sulfur, a=1 to 3, and b=1 or 2 depending upon the valency of Y, provide controlled reactivity, crosslinking and good adhesion

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Danbury, CT, United States of America

Michael L Gunther