Polyurea polycarbamoyl sulphonates

Claim 2

A composition for the treatment of fibrous materials which has the average molecular formula represented by the structure (I), r(nhconr'r'').sub.x (NHCOSO.sub.3.sup.- M.sup.+).sub.Y (I) where R is an organic radical, containing at least 6 carbon atoms; R' is an alkyl or aryl radical which may or may not contain substituents; R" is either hydrogen or an alkyl radical; x and y are each greater than zero and x + y ≧ 2; M + is a monovalent cation or one equivalent of a polyvalent cation such that there is electrical neutrality in the molecule; and the molecular weight, as represented by the formula (I), is in excess of 500.

Claim 3

A method for the preparation of the a composition as defined in claim 1, which comprises reacting a polyisocyanate component (A) which is a compound or mixture of compounds containing on average two or more isocyanate groups attached to carbon atoms, simultaneously or successively with the following components: A. a compound or mixture of compounds containing on average one or more primary and/or secondary amino groups per molecule; B. an aqueous solution containing one or more types of ions selected from metabisulphite, bisulphite and sulphite; C. 75% or more by weight, based on the total mixture, of one or more water-miscible aliphatic solvents containing alcohol and/or ether groups, the proportions of components A, B and C being chosen such that for each mole of isocyanate groups in A there is a total in B and C of at least one mole of amino groups and bisulphite ions or their equivalents.

Claim 4

A method as claimed in claim 2, wherein the proportions of component D and water in component C are such that the product formed in the overall reaction contains more than 10% solids by weight.

Claim 5

A method as claimed in claim 3, wherein the proportion of component D and water are such that the product contains more than 20% solids by weight.

Claim 6

A method as claimed in claim 2, wherein component A is dissolved in solvent D and immediately or after a short delay one of the following alternative steps is performed: 1. a mixture of components B and C is added; or 2. components B and C are added simultaneously; or 3. component B is added, followed by component C; or 4. component C is added, followed by component B; the component B being added as such or in a solution in or organic solvent.

Claim 7

A method as claimed in claim 5, wherein the various steps are performed at a temperature in the range 0° to 40° C.

Claim 8

A method as claimed in claim 6, wherein the temperature is in the range of 0° to 20° C.

Claim 9

A method as claimed in claim 2, wherein the polyisocyanate component (A) is selected from the class consisting of: diisocyanates of structure OCN -- (CH.sub.2).sub.n -- NCO where n is an integer from 2 to 16, 1-isocyanato-3-isocyanatomethyl-3,5,5-trimethylcyclohexane, trimethylhexamethylene diisocyanate, 2-methoxycarbonylpentamethylene-diisocyanate, the isomeric diisocyanato-benzenes, xylenes, naphthalenes, chlorobenzenes and bromobenzenes, the isomeric bisisocyanatomethyl-benzenes, diisocyanato-toluenes, the isomeric bis-(isocyanato) and bis-(isocyanato-methyl)-cyclohexanes and methyl-cyclohexanes, the isomeric bis-(isocyanatocyclohexyl)methanes, diphenyl methane-4,4'diisocyanate, dianisidine diisocyanate, diphenylene diisocyanate, bitolylene diisocyanate, and the commercial product DDI which is a C 36 -diisocyanate; triphenyl methane-4,4',4"-trisocyanate, polymethylene polyphenylisocyanates, and products containing isocyanate rings arising from the trimerisation of aromatic diisocyanates.

Claim 10

A method as claimed in claim 2, wherein the isocyanate component (A) is a higher molecular weight and/or functionality polyisocyanates prepared by the reaction of one or more diisocyanates of structure OCN-(CH.sub.2).sub.n -NCO Where n is an integer from 2 to 16, 1-isocyanate-3-isocyanatomethyl-3,5,5-trimethylcyclohexane, trimethylexamethylene diisocyanate, 2-methoxycarbonyl-pentamethylene-diisocyanate, the isomeric diisocyanato-benzenes, xylenes, naphthalenes, chlorobenzes and bromobenzenes, the isomeric bisisocyanatomethyl-benzenes, diisocyanate-toluenes, the isomeric bis-(isocyanato) and bis-(isocyanatomethyl)-cyclohexanes and methyl-cyclohexanes, the isomeric bis-(isocyanatocyclohexyl)-methanes, diphenyl methane-4,4'diisocyanate, dianisidine diisocyanate, diphenylene diisocyanate, bitolylene diisocyanate, and the commercial product DDI which is a C 36 -diisocyanate with one or more polyols selected from the class consisting of: polyols derived from the polymerisation of cyclic ethers: polycaprolactone polyols, hydroxyl terminated polybutadiene, butadiene-styrene, or butadiene-acrylonitrile copolymers, caster oil and other glycerides of hydroxyacids, polymerised castor oils, the reaction products of ethylene oxide or propylene oxide and castor oil, polyols with a polyester backbone obtained from the reaction of dicarboxylic acids with a slight excess of a diol; glycerol, trimethylolpropane, trimethylol ethane, pentaerythritol and dipentaerythritol.

Claim 11

A method as claimed in claim 2, wherein the amino component (B) comprises one or more compounds (B) having one or more amino groups of the type R 8 NH 2 or R 9 R 10 NH where R 9 is an organic radical and R 10 is either an organic or inorganic radical.

Claim 12

A method as claimed in claim 10, wherein the amino component (B) comprises one or more compounds selected from the class consisting of: primary and secondary aliphatic amines; primary and secondary aromatic or heteroaromatic amines; hydroxylamines of the type R'ONH 2 , HO-NHR' and R'ONHR", mono, di and tri-substituted hydrazines, N-chloroamines, N-substituted sulphamic acids and N-substituted hydroxylamine-O-sulphonic acids; compounds containing two or more primary and/or secondary aliphatic amino groups; diamines of the type R"NHCH 2 CH 2 CH 2 NH 2 where R 11 is an organic radical which are prepared from primary amines by reaction with acrylonitrile, followed by reduction of the resultant nitrile; aromatic diamines; amino terminated polyethers.

Claim 13

A method as claimed in claim 2, wherein the component (C) is a solution prepared by dissolving in water alkali metal and/or ammonium bisulphites and/or metabisulphites, or by passing sulphur dioxide into aqueous solutions of alkali metal or ammonium hydroxides or by acidifying solutions of sulphite salts.

Claim 14

A method as claimed in claim 2, wherein the component (D) is selected from the following class: methanol, ethanol, n-propanol, iso-propanol, the isomeric butanols, tetrahydrofurfuryl alcohol, 2-methoxyethanol, and 2-ethoxyethanol, dioxan, tetrahydrofuran, ethylene glycol dimethyl ether, ethylene glycol diethyl ether, diethylene glycol dimethyl ether, and diethylene glycol diethyl ether.

Claim 15

A method as claimed in claim 13, wherein the component (D) additionally contains water and water-miscible solvent, or a water-immiscible solvent.

Claim 16

Compositions as claimed in claim 1, whenever made by the method of claim 2.

Claim 17

A process for improving the properties of a fibrous material which comprises applying to the material a composition as claimed in claim 1, and curing the composition on the material.

Claim 18

Fibrous materials whenever treated by the process claimed in claim 16.