Reaction products useful for improving the wetfastness of direct and reactive dyes on cellulosic substrates

Claim 2

A water-soluble product obtained by reacting together (A) the product of reacting a mono- or polyfunctional primary or secondary amine in free base or salt form with cyanamide, dicyanodiamide, guanidine or biguanidine; said product containing reactive hydrogen atoms bound to nitrogen, and (B) an N-methylol derivative of a urea, melamine, guanamine, triazinone, urone, carbamate or acid amide in aqueous solution.

Claim 3

A product according to claim 1 obtained by reacting together reactants (A) and (B) in aqueous solution in the presence of (C) a catalyst for the crosslinking of N-methylol compounds of the type (B).

Claim 4

A product according to claim 2 in which catalyst (C) is selected from nitrates sulphates, chlorides and dihydrogen orthophosphates of aluminium, magnesium and zinc.

Claim 5

A product according to claim 3 in which the catalyst (C) is magnesium chloride.

Claim 6

A product according to claim 1 in which reactant (B) is N,N'-dimethylol-4,5-dihydroxyethyleneurea, N,N'-dimethylol-4,5-dimethoxyethyleneurea, an N,N'-dimethylol carbamate, or a lower alkyl ether thereof.

Claim 7

A product according to claim 1 obtained by reacting together (A) the product of reacting diethylene triamine or triethylene tetramine with dicyanodiamide and (B) N,N'-dimethylol-4,5-dihydroxyethyleneurea in the presence of (C) magnesium chloride.

Claim 8

A product according to claim 1 stabilized against gel formation on storage by the addition of from 1 to 10% by weight of dicyanodiamide, cyanamide, guanidine or biguanidine before, during or after the reaction of (A) with (B).

Claim 9

A product according to claim 1 in which reactant (A) is the reaction product of a monofunctional amine of formula Ia RRNH Ia in which each R is as defined below, provided that at least one is other than hydrogen, or a polyfunctional amine of formula Ib RRN--Z--X--.sub.n Z--NRR Ib in which each R independently is hydrogen or a C 1-10 alkyl group unsubstituted or monosubstituted with hydroxy, C 1-4 alkoxy or cyano, n is a number from 0 to 100 Z, or each Z independently when n>0, is C 1-4 alkylene or hydroxyalkylene and X, or each X independently when n>1, is --O--, --S-- or --NR-- where R is as defined above, provided that the amine of formula Ib contains at least one reactive --NH-- or --NH 2 group, with cyanamide, dicyanodiamide or guanidine.

Claim 10

A product according to claim 8 in which reactant (A) is the reaction product of a polyfunctional amine of formula Ib with cyanamide, dicyanodiamide or guanidine.

Claim 11

A product according to claim 9 in which, in the polyfunctional amine of formula Ib, R is hydrogen or C 1-4 alkyl or hydroxyalkyl, n is a number from 0 to 30, Z is 1,2-ethylene, 1,3-propylene or 1,3-(2-hydroxypropylene) and X is --NR--.

Claim 12

A product according to claim 10 in which, in the polyfunctional amine of formula Ib, R is hydrogen and n is an integer from 1 to 6.

Claim 13

A product according to claim 10 in which reactant (B) is N,N'-dimethylol-4,5-dihydroxyethyleneurea, N,N'-dimethylol-4,5-dimethoxyethyleneurea, an N,N'-dimethylol carbamate; or a lower alkyl ether of said compounds.

Claim 14

A product according to claim 12 which is obtained by reacting (A) and (B) in aqueous solution in the presence of (C) a catalyst suitable for crosslinking N-methylol compounds (B) and selected from the nitrates, sulphates, chlorides and dihydrogen orthophosphates of aluminum, magnesium and zinc.

Claim 15

A product according to claim 13 which is obtained from (A), (B) and (C) in relative amounts of 5-40 parts by weight, 25-110 parts by weight and 1-30 parts by weight, respectively.

Claim 16

A product according to claim 10 in which reactant (A) is the reaction product of a polyfunctional amine of formula Ib with dicyanodiamide.

Claim 17

A product according to claim 15 in which reactant (A) is the product of reacting the dicyanodiamide and the amine in a molar ratio of 2:1 to 1:2.

Claim 18

A product according to claim 8 in which reactant (A) is the product of the reaction of 0.1 to 1 mole of cyanamide, dicyanodiamide, guanidine or biguanidine per mole of reactive --NH or --NH 2 group in the amine.

Claim 19

A product according to claim 17 in which reactant (B) is N,N'-dimethylol-4,5-dihydroxyethyleneurea, N,N'-dimethylol-4,5-dimethoxyethyleneurea, an N,N'-dimethylol carbamate; or a lower alkyl ether of said compounds.

Claim 20

A product according to claim 8, which has a viscosity of 50 to 200 centipoises at room temperature in the presence of water in an amount of 30 to 50% by weight.

Claim 21

A product according to claim 8, in which reactants (A) and (B) are in relative amounts of 5-40 parts by weight and 25-110 parts by weight, respectively.

Claim 22

A product according to claim 20 in which reactants (A) and (B) are in relative amounts of 5-40 parts by weight and 25-110 parts by weight, respectively.

Claim 23

A product according to claim 21 stabilized against gel formation on storage by the addition of from 1 to 10% by weight of dicyanodiamide, cyanamide, guanidine or biguanidine before, during or after the reaction of (A) and (B).

Claim 24

A product according to claim 5 in which reactant (B) is N,N'-dimethylol-4,5-dihydroxyethyleneurea, N,N'-dimethylol-4,5-dimethoxyethyleneurea, an N,N'-dimethylol carbamate, or a lower alkyl ether thereof, the reactants (A) and (B) being reacted in aqueous solution in the presence of (C) a catalyst suitable for crosslinking of N-methylol compounds (B) and selected from nitrates, sulphates, chlorides and dihydrogen orthophosphates of aluminum, magnesium and zinc.

Claim 25

A product according to claim 23 which is obtained from (A), (B) and (C) in relative amounts of 5-40 parts by weight, 25-110 parts by weight and 1-30 parts by weight, respectively.

Claim 26

A product according to claim 8 wherein reactant (B) is selected from the group consisting of N,N'-dimethylolurea; N,N'-dimethylolethyleneurea; N,N'-dimethylolpropyleneurea; N,N'-dimethylol-4,5-dihydroxyethyleneurea; N,N'-dimethylol-4,5-dimethoxyethyleneurea; N,N'-dimethylol-5-hydroxypropyleneurea; N,N'-dimethylol-5-methylpropyleneurea; N,N'-dimethylol-5,5-dimethylpropyleneurea; N,N'-dimethylol-4-hydroxy-5,5-dimethylpropyleneurea; N,N'-dimethylol-4-methoxy-5,5-dimethylpropyleneurea; N,N,N',N'-tetramethylolacetylenediurea; mono- or polymethylol melamine; mono- or polymethylol C 1-12 alkyl or C 6-12 arylguanamine; N,N'-dimethylol-5-C 1-12 alkylhexahydro-1,3,5-triazin-2-one; N,N'-dimethylololurone; C 1-4 alkyl-, C 1-2 alkoxy-C 1-4 alkyl- or hydroxy C 1-4 alkyl N,N'-dimethylol carbamates; C 1-4 alkylene tetramethyl dicarbamates; N-methylol C 1-4 alkylene cyclic carbamates; N,N'-dimethylol acrylamide; N,N'-dimethylol methacrylamide; N-methylol C 1-5 alkylene cyclic lactams; and lower alkyl ethers of said compounds.

Claim 27

A product according to claim 25 which is obtained by reacting (A) and (B) in aqueous solution in the presence of (C) a catalyst suitable for crosslinking N-methylol compounds (B) and selected from the nitrates, sulphates, chlorides and dihydrogen orthophosphates of aluminum, magnesium and zinc.