US4368324A — Sizing agent and process for the manufacture ther…

Claim 1

Independent Claim 73 words

A process for treating yarns made of fiber selected from the group consisting of cotton, regenerated cellulose, synthetic fibers and mixtures thereof, with a water-soluble sizing agent, which comprises applying to said yarns a sizing agent comprised substantially of a hydroxyalkylated polysaccharide from the seed of Cassia occidentalis, said polysaccharide having a viscosity of from 40 to about 10,000 mPas (10% aqueous solution, 80° C., Brookfield RVT) and a substitution degree of 0.05-1.0.

Claim 2

Dependent Claim 73 words

A process for treating yarns made of fiber selected from the group consisting of cotton, regenerated cellulose, synthetic fibers and mixtures thereof, with a water-soluble sizing agent, which comprises applying to said yarns a sizing agent comprised substantially of a hydroxyalkylated polysaccharide from the seed of Cassia occidentalis, said polysaccharide having a viscosity of from 40 to about 10,000 mPas (10% aqueous solution, 80° C., Brookfield RVT) and a substitution degree of 0.05-1.0.

Claim 3

Dependent Claim 22 words

A process according to claim 1, wherein the hydroxyalkylated polysaccharide is selected from the group consisting of hydroxyethylated polysaccharides and hydroxypropylated polysaccharides.

Claim 4

Dependent Claim 28 words

A process according to claim 1 wherein the hydroxyalkylated polysaccharide has a viscosity of from about 200 to about 9,000 mPas (10% aqueous solution, 80° C., Brookfield RVT).

Claim 5

Dependent Claim 20 words

A process according to claim 1 wherein the hydroxyalkylated polysaccharide has a substitution degree of from 0.1 to about 0.9.

Claim 6

Independent Claim 55 words

A method for preparing a water-soluble sizing agent which comprises hydroxyalkylating and depolymerizing the polysaccharide gum obtained from the seed of Cassia occidentalis to obtain a sizing agent having a viscosity of from about 40 to about 10,000 mPas (10% aqueous solution, 80° Brookfield RVT) and a substitution degree of from 0.05 to about 1.0.

Claim 7

Independent Claim 55 words

A method for preparing a water-soluble sizing agent which comprises hydroxyalkylating and depolymerizing the polysaccharide gum obtained from the seed of Cassia occidentalis to obtain a sizing agent having a viscosity of from about 40 to about 10,000 mPas (10% aqueous solution, 80° Brookfield RVT) and a substitution degree of from 0.05 to about 1.0.

Claim 8

Dependent Claim 17 words

A method according to claim 5 in which the depolymerization is carried out prior to the hydroxyalkylation.

Claim 9

Dependent Claim 17 words

A method according to claim 5 in which the depolymerization is carried out subsequent to the hydroxyalkylation.

Claim 10

Dependent Claim 15 words

A method according to claim 5 wherein the depolymerization is carried out with hydrogen peroxide.

Claim 11

Dependent Claim 15 words

A method according to claim 5 wherein the depolymerization is carried out with inorganic peroxides.

Claim 12

Dependent Claim 14 words

A method according to claim 5 wherein the depolymerization is brought about by hydrolysis.

Claim 13

Dependent Claim 14 words

A method according to claim 5 wherein the depolymerization is carried out with enzymes.

Claim 14

Dependent Claim 119 words

A process for treating yarns made of fibers selected from the group consisting of cotton, regenerated cellulose, synthetic fibers and mixtures thereof which comprises applying to said yarns a sizing agent which is comprised substantially of a hydroxyalkylated polysaccharide from the seed of Cassia occidentalis, said polysaccharide having a viscosity of from about 40 to about 10,000 mPas (10% aqueous solution, 80° C., Brookfield RVT) and a substitution degree of from 0.05 to about 1.0, in combination with conventional sizing agents chosen from the group of starch and its derivatives, PVA, CMC, acrylate and conventional size additives chosen from the group of fats, glues and waxes, weaving said yarns, and then removing said sizing agent from the woven yarns.

Claim 15

Dependent Claim 119 words

A process for treating yarns made of fibers selected from the group consisting of cotton, regenerated cellulose, synthetic fibers and mixtures thereof which comprises applying to said yarns a sizing agent which is comprised substantially of a hydroxyalkylated polysaccharide from the seed of Cassia occidentalis, said polysaccharide having a viscosity of from about 40 to about 10,000 mPas (10% aqueous solution, 80° C., Brookfield RVT) and a substitution degree of from 0.05 to about 1.0, in combination with conventional sizing agents chosen from the group of starch and its derivatives, PVA, CMC, acrylate and conventional size additives chosen from the group of fats, glues and waxes, weaving said yarns, and then removing said sizing agent from the woven yarns.

Annuity Stage	Window Opens	Payment Deadline	Surcharge Period Until	Estimated Fee	Status
3.5 Years (Year 4)	1986-01-10	1986-07-12	1987-01-11	$2000.00	Window Closed / Lapsed
7.5 Years (Year 8)	1990-01-10	1990-07-12	1991-01-11	$3760.00	Window Closed / Lapsed
11.5 Years (Year 12)	1994-01-10	1994-07-12	1995-01-11	$7700.00	Window Closed / Lapsed

Sizing agent and process for the manufacture thereof

Abstract

Inventors

Bibliographic Details

Claims Analysis

References Cited (Backward Citations)

USPTO Annuity & Maintenance Windows

Assigned Categories & Tags

Assign Category Tag