National Starch and Chemical Corporation

Michael J Hasuly

Peter T Trzasko

Martin M Tessler

Robert L Billmers

Daniel B Solarek

Wadym Jarowenko

Norman L Lacourse

David M Del Giudice

Paulo C Trubiano

Textile warp sizing compositions and hydrophobic starch derivatives useful therefor are provided. The compositions strengthen and protect warp yarns as well as render textile lubricants uniformly dispersible thereon. The compositions additionally facilitate efficient lubricant removal during desizing. The hydrophobic starch derivatives contain an ether, simple ester of half-acid ester substituent with a saturated or unsaturated hydrocarbon chain of at least 5 carbon atoms.

Textile warp size

A polysaccharide derivative having the structure Sacch--O--Z--Ar--CH.dbd.N--Y or ##STR1## where Sacch-O- represents a polysaccharide molecule; Z is --(CH.sub.2).sub.n -- or ##STR2## Ar is a divalent aromatic group; Y is (a) a monovalent group derived from a water-soluble substituted or unsubstituted aromatic compound containing only one free primary amine group, or (b) a monovalent group derived from a water-soluble substituted or unsubstituted aliphatic or cycloaliphatic compound containing only one primary amine group, or (c) a multivalent group derived from a water-soluble protein containing more than one primary amine group; n is one or greater; and m is zero or greater, is prepared by first modifying the polysaccharide with a reagent to introduce free aromatic aldehyde groups and then reacting with a suitable amine-containing reagent. The siloxane-containing starch derivatives are useful in glass forming size compositions.

Polysaccharides containing aromatic aldehydes and their derivatization

A method for sizing glass fibers upon formation is provided, employing a migration-resistant glass forming size composition which comprises an effective amount of a starch derivative having the formula ##STR1## wherein R is dimethylene or trimethylene, R' is a C.sub.8 -C.sub.18 alkyl or alkenyl group, and A is hydrogen or a monovalent cation.

Sized glass fibers and method for production thereof

Textile warp sizing compositions and hydrophobic starch derivatives useful therefor are provided. The compositions strengthen and protect warp yarns as well as render textile lubricants uniformly dispersible thereon. The compositions additionally facilitate efficient lubricant removal during desizing. The hydrophobic starch derivatives contain an ether, simple ester or half-acid ester substituent with a saturated or unsaturated hydrocarbon chain of at least 5 carbon atoms.

Warp sizing compositions and starches useful therefor are prepared from high amylose starches which are converted to a water fluidity viscosity within the range of 65 to 80 and then reacted with an etherification reagent to achieve a nitrogen content of 0.5 to 0.9% (dry basis).

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South Plainfield, NJ, United States of America

Michael J Hasuly