WO2006084592A1 - Polyetheramine macromonomers comprising two neighbouring primary hydroxyl groups and their use for producing polyurethanes - Google Patents

Abstract

The invention relates to polyetheramine macromonomers comprising two neighbouring primary hydroxyl groups, to their production and use. The invention relates to compounds of formula (II), in which R<SUP>1</SUP> represents H, methyl or ethyl, R<SUP>2</SUP> represents C<SUB>1</SUB> to C<SUB>4</SUB> alkyl, A represents a C<SUB>2</SUB> to C<SUB>4</SUB> alkene group, m represents a number between 5 and 300 and n represents a number between 0 and 3. The invention also relates to a method for producing said compounds and to their use during the production of polyurethane prepolymers.

Description

 description

Polyetheramine macromonomers with two adjacent primary hydroxyl groups and their use for the preparation of polyurethanes

The present invention relates to Ω- (alkoxy) -α-N, N-dihydroxyethylamino-polyalkylene glycols, and their use for the preparation of water-dispersible polyurethanes.

Due to their high resistance and ease of application, polyurethane systems have opened up a broad field of application in the paint, coating, coating and textile industries. For environmental and occupational safety reasons, solvent-free, water-dispersed polyurethane systems have been developed in the recent past.

The preparation of aqueous polyurethane dispersions has been known for many years and is described in detail in a large number of publications (eg Houben-Weyl, Methods of Organic Chemistry, Volume E20, Part I ₁ pp 1659-1681, D. Dieterich, Prague, Org Coat, 1981, 9, 281-330, JW Rosthauser, K. Nachtkamp, Journal of Coated Fabrics 1986, 16, 39-79, R. Amoldus, Surf Coat, 1990, 3 (Waterbome Coat.), 179-198).

Aqueous polyurethane dispersions consist of polyurethane polymers or polyurethane-polyurea polymers which contain both urethane groups and urea groups and are accessible by polyaddition reactions of polyols, polyisocyanates and polyamines. From the polyols and the polyisocyanates polyurethane prepolymers are first prepared, which are then dispersed in the aqueous phase and chain extended with polyamines to form the polyurethane-polyurea polymers. The polyurethane polymers must also contain a sufficient amount of hydrophilic groups, which ensure the stabilization in the aqueous phase. These hydrophilic groups are anionic, cationic or nonionic groups or a combination of the groups just mentioned. To be able to dispense with the use of external emulsifiers, the preparation of stable aqueous polyurethane dispersions is possible only with the aid of suitable comonomers, which allow by their hydrophilicity prepolymeren a stable aqueous dispersion of polyurethane. (S. Dedrichs, European Coating Journal pp 565.5, 2002, NoII, DE 25 51 094). In order to achieve a complete incorporation of the hydrophilic comonomers in the hydrophobic polyurethane prepolymer, this is done using diols with hydrophilic radicals such as dimethylolpropanoic acid (DMPA). The dispersion is stabilized in this case after neutralization of the carboxylic acid side groups by electrostatic repulsion of the carboxylate groups incorporated in the prepolymer. (H. Kager, Dissertation, University of Hamburg 2002, Jung-Eun Yang, Journal of Applied Polymer Science 86, 9, p.2375).

In addition to the electrostatic stabilization by carboxylate groups, aqueous polyurethane dispersions are also prepared by nonionic, hydrophilic, sterically stabilizing groups. To achieve this steric stabilization of polyurethane dispersions, therefore, long, hydrophilic, non-isocyanate-reactive side chains are required, which, like DMPA, can be incorporated into the polyurethane prepolymer via two hydroxyl groups (DE-A-25 51 094). Polyethers are particularly suitable

(Polyalkylene glycols) with two free near-adjacent hydroxyl groups at the same molecular end and a long end provided with an alkoxy polyalkylene side chain according to the following formula 1 proved. (S. Dedrichs, European Coating Journal S. 565.5, 2002, DE 3049 746 A1).

Here, m = k = 1; n> = 20 and R = alkyl or alkyl-N-C = O

However, the preparation of such systems is very complicated and expensive, and proceeds over four stages starting from trifunctional alcohols such as glycerol or trimethylolpropane (DE-A-3049 746, EP 0 043 966): Step 1: Preparation of a hydroxymethyl-1,3-dioxolane from the trifunctional alcohol Stage 2: Reaction of the alkaline hydroxymethyl-1, 3-dioxolane with a

Alkylene oxide Step 3: Reaction of the Ω-hydroxy-α- (1,3-dioxolano) -polyalkylene glycol with an alkyl halide or an alkyl monoisocyanate Step 4: Acid-catalyzed cleavage of the 1,3-dioxolane ring to the diol.

A disadvantage of this process is that large amounts of alkali metal halides are obtained as by-products in the etherification in stage 3, which interfere with the further conversion to polyurethane prepolymers and are difficult to remove. In addition, in the case of an incomplete reaction in step 3, in addition to the target diols, trihydroxy-functional polyalkylene glycols may be formed as by-products which may cause crosslinking and thus insolubility in the polyurethane prepolymer dispersion during the copolymerization into the polyurethane prepolymer dispersion (EP-A-0 43 966). In the preparation of diisocyanates with Polyalkylenglykolseitenketten described in DE-A-25 14 513 by reaction of triisocyanates with a monohydroxy-functional Polyalkylene glycol raises the problem of the formation of crosslinking triisocyanates or the presence of monohydroxy or monoisocyanate functional components depending on the selected stoichiometry. Again, triisocyanate functional components potentially cause crosslinking, but monohydroxy or monoisocyanate functional components cause chain termination of the linear PU polymers.

Object of the present invention was therefore to find a simple and inexpensive to produce Ω- (alkoxy) -α-dihydroxyalkyl-polyalkylene glycol, which does not have the above-mentioned disadvantages in the preparation and application.

The Ω- (alkoxy) -α-dihydroxyalky! -Polyalkylene glycol should be suitably used in

Polyurethane prepolymer dispersions can be incorporated and ensure the stability of the aqueous prepolymer dispersions.

The invention thus relates to compounds of the formula 2

wherein

R ^{1 is} H, methyl or ethyl,

R ^{2 is} C 1 -C ₄ -alkyl,

A is a C ₂ to C ₄ alkylene group, m is a number from 5 to 300 n is a number from 0 to 3.

Another object of the invention is a process for the preparation of polyurethane prepolymers by reacting compounds of formula 2 with a Polyisocyanate and optionally with further polyols or polyamines.

Another object of the invention is a process for the preparation of polyurethane polymers by reacting a) a compound of formula 2 with a polyisocyanate and optionally with other polyols or polyamines to a polyurethane prepolymer, and b) the resulting polyurethane prepolymer in aqueous Milieu reacted with a polyamine to a polyurethane polymer.

Another object of the invention are polyurethane prepolymers obtainable by the reaction of a compound of formula 2 with an isocyanate of the formula X (NCO) _P , wherein p is a number from 2 to 4 and X is an aliphatic, cycloaliphatic, aromatic or araliphatic hydrocarbon radical ,

Another object of the invention are polyurethane polymers obtainable by the reaction of a compound of formula 2 with an isocyanate of the formula X (NCO) _P , wherein p is a number from 2 to 4 and X is an aliphatic, cycloaliphatic, aromatic or araliphatic hydrocarbon radical, and the subsequent reaction of the polyurethane prepolymer thus obtained in an aqueous medium with a polyamine of the formula Y (NH 2) _q , in which Y is an aliphatic, cycloaliphatic, aromatic or araliphatic hydrocarbon radical, and q is a number from 2 to 4.

Another object of the invention is the use of the compounds of formula 2 for the preparation of polyurethane prepolymers by the compound of formula 2 with an isocyanate of the formula X (NCO) _P , wherein p is a number from 2 to 4 and X is an aliphatic, cycloaliphatic, aromatic or araliphatic hydrocarbon radical is reacted.

Another object of the invention is the use of the compounds of formula 2 for the preparation of Polyurethanpoiymeren by the compound of Formula 2 with an isocyanate of the formula X (NCO) _P , wherein p is a number from 2 to 4 and X is an aliphatic, cycloaliphatic, aromatic or araliphatic hydrocarbon radical, is reacted, and the resulting polyurethane prepolymer in an aqueous medium with a polyamine of the formula Y (NH ₂ ) _q , wherein Y is an aliphatic, cycloaliphatic, aromatic or araliphatic hydrocarbon radical, and q is a number from 2 to 4.

In the alkoxy group represented by (AO) _m , the total number of alkoxy units is preferably between 10 and 200. The alkoxy chain may be a homopolymer or block polymer chain having alternating blocks of various alkoxy units. It can also be a chain with a statistical sequence of the alkoxy units. The alkoxy units are preferably either only ethoxy units, or a mixture of ethoxy and propoxy units.

In a preferred embodiment, - (AO) _m -R ² is an alkoxy of the formula _b (CH (CH ₃₎ - CH ₂ - O) _a - (O CH ₂ - - CH ₂₎ - wherein R * a is a number of 0 to 300, preferably 0 to 50 b, a number from 5 to 300, preferably 10 to 200 and R ^{2 has} the meaning given above.

In a further preferred embodiment, R ^{1 is} hydrogen. In a further preferred embodiment, n = 0 or 1. All embodiments have in common that preferably at least 50 mol% of the radicals (AO) are ethoxy radicals.

The compounds of the formula 2 are also referred to below as Ω-alkoxy polyetheramine diols. The process for producing the Ω-alkoxy-polyether-amine diols and the preparation of polyurethane dispersions is thus described in greater detail below and illustrated by way of examples.

The Ω-alkoxy-polyether-amine diols can be prepared from commercially available α-amino-Ω-alkoxy polyalkylene glycols (DE-A-1643426), or α-amino-Ω-alkoxy polyalkylene glycols prepared specifically for this purpose are prepared from α-hydroxy-Ω- Alkoxypolyalkylenglykolen be prepared according to the process described in DE-A-1643426 by the α-hydroxy group is replaced by an amino group in an aminolysis reaction. The Ω-alkoxy-Polyetheramindiole can also be prepared by other methods known in the literature, such as the addition of acrylonitrile to an alcohol, and subsequent reduction of the nitrile function to the amine. This amino group is then reacted without addition of an alkoxylation catalyst with exactly 2 moles of alkylene oxide to Dihydroxyethylaminogruppe.

The degree of water solubility, defined by the cloud point according to DIN EN 1890, the Ω-alkoxy-Polyetheramindiole, and the degree of their hydrophilizing and dispersierenπden effect can be adjusted by the ratio and number of alkylene oxide units (AO) _m , preferably from ethylene oxide to propylene oxide ,

The isocyanates of the formula X (NCO) _P are preferably those in which X is an aliphatic hydrocarbon radical having 4 to 12 carbon atoms, a cycloaliphatic or aromatic hydrocarbon radical having 6 to 15 carbon atoms or an araliphatic hydrocarbon radical having 7 to 15 carbon atoms.

Examples of such diisocyanates are tetramethylene diisocyanate, hexamethylene diisocyanate, dodecamethylene diisocyanate, 1,4-diisocyanatocyclohexane, 1-isocyanato-3,5,5-trimethyl-5-isocyanatomethylcyclohexane (IPDI), 2,2-bis (4-isocyanatocyclohexyl) propane , Trimethylhexane diisocyanate, 1,4- Diisocyanatobenzene, 2,4-diisocyanatotoluene, 2,6-diisocyanatotoluene, 4.4 ^l -diisocyanato-diphenylmethane, 2,4'-diisocyanato-diphenylmethane, p-xylylene diisocyanate, tetramethylxylylene diisocyanate (TMXDI), the isomers of bis (4-isocyanatocyclohexyl ) methane (HMDI) such as the trans / trans, the cis / cis and the cis / trans isomers and mixtures of these compounds.

Particularly suitable mixtures of these isocyanates are the mixtures of the respective structural isomers of diisocyanate toluene and diisocyanato-diphenylmethane; in particular, the mixture of 80 mol% 2,4-diisocyanatotoluene and 20 mol% 2,6-diisocyanatotoluene is suitable. Furthermore, the mixtures of aromatic isocyanates such as 2,4-diisocyanatotoluene and / or 2,6-diisocyanatotoluene with aliphatic or cycloaliphatic isocyanates such as hexamethylene diisocyanate or IPDI are particularly advantageous, wherein the preferred mixing ratio of aliphatic to aromatic isocyanates 4: 1 to 1: 4.

For the construction of the polyurethanes can be used as compounds in addition to the aforementioned also isocyanates, in addition to the free isocyanate groups further blocked isocyanate groups, e.g. Wear uretdione groups.

The polyamines used for the reaction of the polyurethane prepolymers to the polyurethane polymers are those in which Y is an aliphatic hydrocarbon radical having 4 to 12 carbon atoms, a cycloaliphatic or aromatic hydrocarbon radical having 6 to 15

Carbon atoms or an araliphatic hydrocarbon radical having 7 to 15 carbon atoms. Preferred amines are polyfunctional amines of the molecular weight range from 32 to 500 g / mol, preferably from 60 to 300 g / mol, which contain at least two amino groups selected from the group of the primary and secondary amino groups. Examples thereof are diamines such as diaminoethane, diaminopropanes, diaminobutanes, diaminohexanes, piperazine, 2,5-dimethylpiperazine, amino-3-aminomethyl-3,5,5-trimethylcyclohexane πsophorondiamin, IPDA), 4,4-diaminodicyclohexylmethane ^I, 1,4-diaminocyclohexane, aminoethylethanolamine, hydrazine, hydrazine hydrate or triamines such as diethyltriamine or 1, 8-diamino-4-aminomethyloctane.

The amines may also be in blocked form, e.g. in the form of the corresponding ketimines (see, for example, CA-A 1 129 128), ketazines (see, for example, US-A 4,269,748) or amine salts (see US-A 4,292,226). Also oxazolidines, as used for example in US-A 4,192,937, are capped polyamines, which can be used for the preparation of the polyurethanes according to the invention for chain extension of the prepolymers. Preference is given to using mixtures of di- and triamines, particularly preferably mixtures of isophoronediamine (IPDA) and diethylenetriamine (DETA).

The described polyamines are also suitable for use in the reaction of the compound of formula 2 with a polyisocyanate.

If appropriate, diols are used in the reaction of the compounds of the formula 2 with polyisocyanates to give the polyurethane prepolymer, and in the preparation of the polyurethane polymers.

The diols are, in particular, polyester polyols, e.g. from Ulimann's Encyklopadie der technischen Chemie, 4th Edition, Volume 19, pp. 62 to 65 are known. Preference is given to using polyesterpolyols which are obtained by reacting dihydric alcohols with dibasic carboxylic acids. Instead of the free polycarboxylic acids, it is also possible to use the corresponding polycarboxylic acid anhydrides or corresponding polycarboxylic acid esters of lower alcohols or mixtures thereof to prepare the polyesterpolyols. The polycarboxylic acids may be aliphatic, cycloaliphatic, araliphatic, aromatic or heterocyclic and optionally, e.g. by halogen atoms, substituted and / or unsaturated. Examples include:

Suberic, azelaic, phthalic, isophthalic, phthalic, tetrahydrophthalic, hexahydrophthalic, tetrachlorophthalic, endomethylenetetrahydrophthalic anhydride, Glutaric anhydride, maleic acid, maleic anhydride, fumaric acid, dimer fatty acids. Preference is given to dicarboxylic acids of the general formula HOOC- (CH ₂ ) _y -COOH, where y is a number from 1 to 20, preferably an even number from 2 to 20, for example succinic acid, adipic acid, sebacic acid and dodecanedicarboxylic acid.

As the polyhydric alcohols, e.g. Ethylene glycol, propane-1,2-diol, propane-1,3-diol, butane-1,3-diol, butene-1,4-diol, butyne-1,4-diol, pentane-1,1-diol, neopentyl glycol, Bis (hydroxymethyl) cyclohexanes such as 1,4-bis (hydroxymethyl) cyclohexane, 2-methylpropane-1,3-diol, methylpentanediols, furthermore diethylene glycol, triethylene glycol, tetraethylene glycol, polyethylene glycol, dipropylene glycol, polypropylene glycol, dibutylene glycol and polybutylene glycols consideration.

Alcohols of the general formula HO- (CH ₂ ) _X -OH are preferred, where x is a number from 1 to 20, preferably an even number from 2 to 20. Examples of these are ethylene glycol, butane-1, 4-diol, hexane-1, 6-diol, octane-1,8-diol and dodecane-1, 12-diol. Further preferred is neopentyl glycol. Also suitable are polycarbonate diols, as can be obtained, for example, by reacting phosgene with an excess of the low molecular weight alcohols mentioned as synthesis components for the polyesterpolyols.

Also suitable are lactone-based polyesterdiols, which are homopolymers or copolymers of lactones, preferably terminal hydroxyl-containing addition products of lactones onto suitable difunctional starter molecules. Suitable lactones are preferably those which are derived from compounds of the general formula HO- (CHa) ₂ -COOH, where z is a number from 1 to 20 and an H atom of a methylene unit by a Cr to C ₄ alkyl may be substituted. Examples are e-caprolactone, ß-propiolactone, γ-butyrolactone and / or methyl-e-caprolactone and mixtures thereof. Suitable starter components are, for example, the low molecular weight dihydric alcohols mentioned above as the synthesis component for the polyesterpolyols. The corresponding polymers of e-caprolactone are particularly preferred. Lower polyester diols or polyether diols can also be used as starters for the preparation of the lactone polymers. Instead of the polymers of lactones, it is also possible to use the corresponding, chemically equivalent polycondensates of the hydroxycarboxylic acids corresponding to the lactones.

In addition, suitable monomers are polyether diols. They are in particular by polymerization of ethylene oxide, propylene oxide, butylene oxide, tetrahydrofuran, styrene oxide or epichlorohydrin with itself, for example in the presence of BF ₃ or by addition of these compounds, optionally in admixture or in succession, to starting components with reactive hydrogen atoms, such as alcohols or amines, eg Water, ethylene glycol, propane-1,2-diol, propane-1,3-diol, 1,2-bis (4-hydroxy-diphenyl) -propane or aniline available. Particularly preferred is polytetrahydrofuran having a molecular weight of 240 to 5000, and especially 500 to 4500.

Also suitable are polyhydroxyolefins, preferably those having 2 terminal hydroxyl groups, e.g. α, -ιυ-Dihydroxypolybutadien, α, -ω-Dihydroxypoly- methacrylic ester or <x, -ω-Dihydroxypolyacrylester as monomers. Such compounds are known, for example, from EP-A-0 622 378. Further suitable polyols are polyacetals, polysiloxanes and alkyd resins.

The following examples illustrate the invention in more detail.

example 1

735 g of an α-hydroxy-Ω-methoxy-polyalkylene glycol having a molecular weight of 2140 g / mol and a number ratio of oxypropylene to oxyethylene units of 22 to 78 are reacted with ammonia and hydrogen in the presence of a Ni-containing catalyst to the corresponding amine. The resulting primary amine had a total nitrogen content of

0.65% by weight. It is reacted after removal of the Ni catalyst with 2 equivalents of ethylene oxide (32 g) at 19O ⁰ C and a pressure of 4 bar to the corresponding α-Dihydroxyethylamino-Ω-methoxy-polyalkylene glycol. Of the Total nitrogen content after the reaction was 0.55 wt .-%, corresponding to a molecular weight of 2545 g / mol. The proportion of tertiary amine was 98.2 wt .-%. The product was characterized by ¹ H-NMR.

Example 2

730 g of an α-hydroxy-Ω-methoxy-polyalkylene glycol having a molecular weight of

2330 g / mol and a ratio of the oxypropylene to the oxyethylene units of 12 to 88 were reacted with ammonia and hydrogen in the presence of a Ni-containing catalyst to the corresponding amine. The resulting primary amine had a total nitrogen content of 0.60 wt%. It was reacted after removal of the catalyst with 2 equivalents of ethylene oxide (34 g) at 190 ⁰ C and a pressure of 4 bar to the corresponding α-Dihydroxyethylamino- Ω-methoxy-polyalkylene glycol. The total nitrogen content after the reaction was 0.57 wt .-%, corresponding to a molecular weight of 2456 g / mol. The proportion of tertiary amine was 98.2 wt .-%. The product was characterized by ¹ H-NMR.

Beispiel 3:

Example 3:

685 g of an α-hydroxy-Ω-methoxy-polyalkylene glycol having a molecular weight of 750 g / mol and a ratio of the oxypropylene to the oxyethylene units of 4 to 11 were reacted with ammonia and hydrogen in the presence of a Ni-containing catalyst to the corresponding amine. The resulting primary amine had a total nitrogen content of 1.78% by weight. It was reacted after removal of the catalyst with 2 equivalents of ethylene oxide (81 g) at 190 ⁰ C and a pressure of 4 bar to the corresponding α-dihydroxyethylamino-Ω-methoxy polyalkylene glycol. The total nitrogen content after the reaction was 1.6 wt .-%, corresponding to a molecular weight of 875 g / mol. The proportion of tertiary amine was 99 wt .-%. The product was characterized by ¹ H-NMR.

Example 4 Preparation of an Aqueous Polyurethane Dispersion in the Acetone Process

224 g of adipic acid-diethylene glycol polyester diol (OH number 52.6), 1.34 g DMPA, 52.5 g of the α-dihydroxyethylamino-Ω-methoxy-polyalkylene glycol from Example 3, 16.8 g of hexamethylene diisocyanate and 44.2 g Isophorone diisocyanate were reacted at 90 ⁰ C in two hours to a polyurethane prepolymer. The theoretical residual NCO content was 3.10 wt .-%. The theoretical measured value determined by titration was 2.36% by weight based on the amine contained. The NCO residual content measured in the experiment was 2.18% by weight. 150 g of acetone were added to the prepolymer, neutralized with 1 g of triethylamine, cooled to room temperature and dispersed with 650 g of water. The Chain extension of the aqueous dispersed prepolymer was carried out with 6.7 g of ethylenediamine dissolved in 50 g of water. Subsequent distillation in vacuo removed the acetone. The result was a milky white, low-viscosity and storage-stable polyurethane dispersion having a solids content of 30% by weight, a pH of 8.0 and an average particle diameter of 200 nm (measured by Particle Size Analyzer 90 Plus, Brookhaven Instruments).

Example 5:

Preparation of an Aqueous Polyurethane Dispersion in the Prepolymer Ionomer Process

153 g of a polypropylene glycol (OH number 110), 70 g of α-Dihydroxyethylamino- Ω-methoxy-polyalkylene glycol from Example 3 and 77.4 g of isophorone diisocyanate with 0.1 g of dibutyltin dilaurate at 75 ° C in 2.5 hours to a Implemented polyurethane prepolymer. The theoretical residual NCO content was 3.36 wt .-%. The theoretical reading determined by titration was 2.24 wt% due to the amine contained. The NCO residual content measured in the experiment was 2.20% by weight. The prepolymer was cooled to 45 ⁰ C and dispersed in 650 g of water. The chain extension of the aqueous dispersed prepolymer was carried out with 7.1 g of ethylenediamine dissolved in 50 g of water. The result was an orange translucent, low-viscosity and storage-stable polyurethane dispersion having a solids content of 30% by weight, a pH of 8.5 and an average particle diameter of 40 nm.

Claims

claims: 1. Compounds of the formula 2

wherein R ^{1 is} H, methyl or ethyl, R ^{2 is} C ₁ - to C ₄ -alkyl, A is a C ₂ - to C ₄ -alkylene group, 0 m is a number from 5 to 300 n is a number from 0 to 3. 2. Compounds according to claim 1, wherein at least 50 mol% of the radicals 5 (A-O) are ethoxy radicals. 3. Compounds according to claims 1 and / or 2, wherein the (AO) _m - group for an alkoxy group of the formula _Q (CH (CH ₃ ) -CH ₂ -O) _a - (CH ₂ -CH ₂ -O) _b -R * in which a is a number from 0 to 150 b is a number from 5 to 300 5 R ² C ₁ - to C ₄ -alkyl n is 0 or 1. 4. Compounds according to one or more of claims 1 to 3, wherein R ¹ = H is. 5. A process for the preparation of compounds of formula 2, by first exchanging in an α-hydroxy-Ω-Alkoxypolyalkylenglykol by an aminolysis the α-hydroxy group by an amino group, and this amino group then without addition of an alkoxylation catalyst with 2 moles of alkylene oxide Reacts dihydroxyethylamino group. 6. A process for the preparation of polyurethane prepolymers by reacting compounds of formula 2 with a polyisocyanate and optionally with other polyols or polyamines. 7. A process for the preparation of polyurethane polymers by reacting a) a compound of formula 2 with a polyisocyanate and optionally with other polyols or polyamines to a polyurethane prepolymer, and b) the resulting polyurethane prepolymer in an aqueous medium with a polyamine a polyurethane polymer. 8. Polyurethane prepolymers obtainable by the reaction of a compound of formula 2 with an isocyanate of the formula X (NCO) _P , wherein p is a number from 2 to 4 and X is an aliphatic, cycloaliphatic, aromatic or araliphatic hydrocarbon radical. 9. Polyurethane polymers obtainable by the reaction of a compound of the formula 2 with an isocyanate of the formula X (NCO) _P , wherein p is a number from 2 to 4 and X is an aliphatic, cycloaliphatic, aromatic or araliphatic hydrocarbon radical, and the subsequent reaction of the thus obtained polyurethane prepolymer in an aqueous medium with a polyamine of the formula Y (NH 2) q, in which Y is an aliphatic, cycloaliphatic, aromatic or araliphatic hydrocarbon radical, and q is a number from 2 to 4. 10. Use of the compounds of the formula 2 for the preparation of polyurethane prepolymers by reacting the compound of the formula 2 with a Isocyanate of the formula X (NCO) _P , wherein p is a number from 2 to 4 and X is an aliphatic, cycloaliphatic, aromatic or araliphatic hydrocarbon radical, is reacted. 11. - Use of the compounds of formula 2 for the preparation of Polyurethane polymers by reacting the compound of the formula 2 with an isocyanate of the formula X (NCO) _P in which p is a number from 2 to 4 and X is an aliphatic, cycloaliphatic, aromatic or araliphatic hydrocarbon radical, and the resulting polyurethane prepolymer in an aqueous medium with a polyamine of the formula Y (NH ₂ ) _q , wherein Y is an aliphatic, cycloaliphatic, aromatic or araliphatic hydrocarbon radical, and q is a number from 2 to 4, is reacted.