Claims
- 1. An improved warp sizing composition for textile yarns of the type containing water, a starch derivative, and a lubricant; wherein the improvement comprises (a) the presence, as the starch derivative, of a non-granular hydrophobic starch derivative containing an ether substituent with a saturated or unsaturated hydrocarbon chain of at least 5 carbon atoms or a simple ester substituent with a saturated or unsaturated hydrocarbon chain of at least 6 carbon atoms; and (b) the presence of about 3 to 50% of a lubricant selected from synthetic and natural fats, oils and waxes, based on the weight of the hydrophobic starch derivative; the warp sizing composition being characterized by uniform lubricant dispersibility during sizing and efficient lubricant removability during desizing.
- 2. The warp sizing composition of claim 1, wherein the lubricant is selected from the group consisting of tallow, hydrogenated tallow, and paraffin.
- 3. The warp sizing composition of claim 2, wherein the lubricant is present in amounts of 5 to 20%.
- 4. The warp sizing composition of claim 1, wherein 100 parts of the water and 2 to 40 parts of the starch derivative are present.
- 5. The warp sizing composition of claim 4, wherein the hydrophobic starch ester derivative has the formula: St--O--Z--A wherein St--O represents a starch molecule, Z is ##STR8## or --SO.sub.2 --, and A comprises a saturated or unsaturated hydrocarbon chain of at least 6 carbon atoms.
- 6. The warp sizing composition of claim 5, wherein A is C.sub.6 -C.sub.22 alkyl or alkenyl.
- 7. The warp sizing composition of claim 6, wherein Z is ##STR9## and the hydrocarbon chain is unbranched.
- 8. The warp sizing composition of claim 4, wherein the hydrophobic starch ether is the reaction product of starch and an etherifying reagent, the reagent being (a) the reaction product of an epihalohydrin and a tertiary amine containing the hydrocarbon chain; or (b) a tertiary amine halide or salt thereof containing the hydrocarbon chain.
- 9. The warp sizing composition of claim 8, wherein the hydrocarbon chain contains 5 to 14 carbon atoms.
- 10. The warp sizing composition of claim 9, wherein the hydrocarbon chain is unbranched.
- 11. An improved warp sizing composition of the type containing water, a starch derivative, and a lubricant; wherein the improvement comprises (a) the presence, as the starch derivative, of a hydrophobic starch half-acid ester having the formula: ##STR10## wherein St--O-- represents a starch molecule, R is dimethylene or trimethylene, A' comprises a saturated or unsaturated hydrocarbon chain of at least 5 carbon atoms, and M is selected from the group consisting of hydrogen, an alkali or an alkaline earth metal, and NH.sub.4 ; and (b) the presence of the lubricant selected from synthetic and natural fats, oils and waxes in an amount of about 3 to 50% based on the weight of the hydrophobic starch half-acid ester; the warp sizing composition being characterized by uniform lubricant dispersibility during sizing and efficient lubricant removability during desizing.
- 12. The warp sizing composition of claim 11 wherein 100 parts of the water, 2 to 40 parts of the starch derivative, 5 to 20% of the lubricant, and 0 to 20 parts polyvinyl alcohol are present.
- 13. The warp sizing composition of claim 12, wherein the lubricant is selected from the group consisting of tallow, hydrogenated tallow, and paraffin.
- 14. The warp sizing composition of claim 11, wherein R is dimethylene and A' is C.sub.5 -C.sub.18.
- 15. The warp sizing composition of claim 14, wherein A' is unbranched C.sub.5 -C.sub.14.
- 16. The warp sizing composition of claim 14, wherein the starch is selected from the group consisting of waxy maize, corn starch, high amylose corn starch, the converted products thereof, and the derivatized products thereof wherein the derivatization employs an ionic or nonionic etherifying or esterifying reagent other than the anhydride reagent.
- 17. A warp sizing composition for textile yarns comprising:
- (a) 100 parts water;
- (b) 2 to 40 parts of a nongranular hydrophobic starch derivative containing an ether or half-acid ester substituent with a saturated or unsaturated hydrocarbon chain of at least 5 carbon atoms or a simple ester substituent with a saturated or unsaturated hydrocarbon chain of at least 6 carbon atoms; and
- (c) 11 to 50% by weight of the hydrophobic starch derivative of a textile lubricant selected from syntehtic and natural fats, oils and waxes;
- the warp sizing composition being characterized by uniform lubricant dispersibility during sizing of the warp yarns and efficient lubricant removability during desizing.
- 18. The warp sizing composition of claim 17, wherein the hydrophobic starch derivative contains the half-acid ester substituent, the starch derivative having the formula: ##STR11## wherein St--O-- represents a starch molecule, R is dimethylene or trimethylene, A' comprises the hydrocarbon chain, and M is selected from the group consisting of hydrogen, an alkali or an alkaline earth metal, and NH.sub.4.
- 19. The warp sizing composition of claim 18, wherein A' is C.sub.5 -C.sub.18 alkyl or alkenyl.
Parent Case Info
This is a continuation-in-part of copending application Ser. No. 725,026 filed Apr. 19, 1985 now abandoned.
US Referenced Citations (12)
Foreign Referenced Citations (1)
Number |
Date |
Country |
1444498 |
Jul 1976 |
GBX |
Continuation in Parts (1)
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Number |
Date |
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Parent |
725026 |
Apr 1985 |
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