Hydrophilic, alkoxysilane-containing isocyanurates

1. An alkoxysilane-containing isocyanurate of formula (II)

wherein

R 1 , R 2 and R 3 are, in each case independently of one another, a linear, a branched, or a cyclic C 1 -C 8 alkylene radical,

R′, R″ and R′″ are, in each case independently of one another, a linear, a branched, or a cyclic C 1 -C 8 alkyl radical,

j, k, l, are each independently of one another, 0, 1, 2 or 3,

1≤j+k+l≤7, and

radical —OB is a polyalkylene oxide polyether alkoxy radical, or

radical —OB has formula —O{(X)-(y) a -(Z)},

wherein

radical X derives

from a hydroxypolyethylene glycol ether of empirical formula HO(CH 2 CH 2 O) n T 1 , wherein n=2-100, wherein T 1 =H or C 1 -C 6 alkyl, or

from a hydroalkylcarboxylic acid, or

from a hydroxypolyethersulfonic acid,

a is 0 or 1,

radical y, if present, derives from a di- or polyisocyanate, from a di- or polycarboxylic acid derivative, from a di- or polyepoxide, from a mono- or polyalkoxysilane, from an epoxyisocyanate, from an epoxyalkoxysilane or from an isocyanatosilane, and

radical Z derives

from a hydroxy-terminated polyether of formula

TO(CTHCH 2 O) n (CH 2 CH 2 O) p T′, wherein T=—(CH 2 ) m CH 3 , n and m independently of one another=0-20, p=0-5 wherein n is greater than or equal to 4 times p, and T′=H or C 1 -C 18 alkyl, or

from one or more than one hydroxyhydrocarbon having 1-18 carbon atoms, which is optionally branched and/or optionally contains rings and/or heteroatom(s), or

from an alkylene oxide having at least four carbon atoms which is optionally branched and/or optionally contains rings.

2. The isocyanurate according to claim 1 , wherein

R 1 =R 2 =R 3 =—CH 2 —, —CH 2 CH 2 —, —CH 2 CH 2 CH 2 — or —CH 2 CH 2 CH 2 CH 2 —, and

R′, R″ and R′″ are identical and selected from the group consisting of —CH 3 , —CH2CH 3 , and —CH(CH 3 )CH 3 .

3. The isocyanurate according to claim 2 , wherein

R 1 =R 2 =R 3 =—CH 2 CH 3 CH 2 — and

R′, R″ and R′″ are identical and selected from the group consisting of —CH 3 and —CH 2 CH 3 .

4. The isocyanurate according to claim 1 , wherein

the polyalkylene oxide polyether alkoxy radical is a polyethylene glycol monomethyl ether alkoxy radical having on average 5 to 30 ethylene oxide units.

5. The isocyanurate according to claim 1 , wherein

radical X derives

from a hydroxypolyalkylene glycol ether of empirical formula HO(CH 2 CH 2 O) n T 1 wherein n=2-100, where T 1 =H or C 1 -C 6 alkyl, and

radical Z has formula -G-D-H, wherein

G is a structural element of formula (III)

 wherein T 5 independently at each occurrence is a saturated, unsaturated, branched or unbranched, substituted or unsubstituted hydrocarbon radical having at least two carbon atoms,

 and w is greater than or equal to one;

D is an oxyethylene radical or oxypropylene radical of formula —(CH 2 CHT 6 O) v wherein v is greater than or equal to 0, and T 6 =—H or —CH 3 ; and

H=hydrogen.

6. A process for preparing the isocyanurate according to claim 1 , the process comprising:

reacting at least one alkoxysilane-containing isocyanurate of formula (I)

with at least one hydrophilizing agent of formula BOH, which has at least one OH group,

wherein

R 1 , R 2 and R 3 are, in each case independently of one another, a linear, a branched, or a cyclic C 1 -C 8 alkylene radical,

R′, R″ and R′″ are, in each case independently of one another, a linear, a branched, or a cyclic C 1 -C 8 alkyl radical, and

B is a hydrophilic radical.

7. The process according to claim 6 , wherein

the alkoxysilane-containing isocyanurate of formula (I) and the hydrophilizing agent BOH are present in a (I)/BOH molar ratio of from 15:1 to 1:7.

8. A coating or plastics formulation, a crosslinker, an emulsifier, an admixture for mineral building materials and/or an adjuvant for aqueous polyurethane dispersions, comprising:

the isocyanurate according to claim 1 .

9. A coating or plastic formulation, comprising:

the isocyanurate according to claim 1 .

10. A coating or plastic formulation according to claim 9 , further comprising:

at least one isocyanurate of formula (I)

wherein

R 1 , R 2 and R 3 are, in each case independently of one another, a linear, a branched, or a cyclic C 1 -C 8 alkylene radical, and

R′, R″ and R′″ are, in each case independently of one another, a linear, a branched, or cyclic C 1 -C 8 alkyl radical.