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US 2013/0092052 A1Published application
Alkyl- and amino-functionalized siloxanes comprising bis(alkoxysilyl)amine for the mass hydrophobization of inorganic building materials
AssigneeEvonik Degussa GmbH
InventorsManuel Friedel, Spomenko Ljesic
Life of this patent
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Abstract
The invention relates to a composition for the hydrophobization, preferably the mass hydrophobization, of inorganic building materials, in particular substantially non-siliceous building materials containing inorganic alkali metals and/or alkaline earth metals, comprising at least one water-soluble amino- and alkyl-functional co-condensate siloxane and a bis(alkoxysilyl)amine, as well as to the hydrolysis products thereof, to a method for producing said composition, and also to the use of the composition for mass-hydrophobization, preferably of gypsum.
Claims20
A composition comprising water and a hydrophobizing agent, wherein the hydrophobizing agent comprises (i) and (ii):
- (i) a water-soluble, amino- and alkyl-functional cocondensate siloxane derived from an alkoxysilane and having at least one crosslinking structural element that forms a catenary structure, a cyclic structure, or a crosslinked structure, where at least one structure corresponds in idealized form to formula I,
- (R2O)[(R2O)1-x(R3)xSi(B)O]b[Si(C)(R5)y(OR4)1-yO]c[Si(D)2O]dR6.(HX)e (I)
- where
- B independently corresponds to an aminoalkyl radical of formula IVa or IVb
- R10h*NH(2-h*)[(CH2)h(NH)]j[(CH2)l(NH)]n—(CH2)k— (IVa),
- in which h, l, and k independently correspond to an integer;
- 0≦h≦6;
- 0≦l≦6;
- 0≦k≦6, h*=0, 1 or 2, j=0, 1 or 2;
- n=0, 1 or 2;
- and R10 corresponds to a benzyl, aryl, vinyl or formyl radical or to a linear, branched or cyclic alkyl radical having 1 to 8 C atoms,
- [NH2(CH2)m]2N(CH2)p— (IVb),
- where m and p independently correspond to an integer, with 0≦m≦6 and 0≦p≦6,
- C corresponds to a linear, branched or cyclic alkyl radical having 1 to 20 C atoms,
- D independently in each case corresponds to a linear, branched or cyclic alkyl radical having 1 to 8 C atoms, and
- where R2, R4 and R6 are hydrogen, and
- R3 and R5 independently correspond to a linear, branched or cyclic alkyl radical having 1 to 4 C atoms, or an aryl radical, and
- HX represents an acid, where X is an inorganic or organic acid radical,
- with x=0 or 1, y=0 or 1, with b, c, d, and e independently integers and b≧1, c≧0, d≧0, e≧0, with the proviso that (c+d)≧1
- where on crosslinking, the cocondensate releases substantially
- no alcohol, and
- (ii) a bis(alkoxysilyl)amine of formula II
- (OR1)3-z(R7)zSi-A-Si(R7)z(OR1)3-z (II)
- where A is a divalent amine, R1 independently is hydrogen or a linear, branched or cyclic alkyl radical having 1 to 4 C atoms, and R7 independently is a linear, branched or cyclic alkyl radical having 1 to 6 C atoms, with z=0 or 1;
- or a hydrolysis or condensation product thereof, optionally with a siloxane from (i).
22 more elements
A method for producing a composition, the method comprising mixing (i) and (ii) to obtain a hydrophobizing agent:
- (i) a water-soluble, amino- and alkyl-functional cocondensate siloxane and water, the siloxane being derived from an alkoxysilane and having at least one crosslinking structural element that forms a catenary structure, a cyclic structure, or a crosslinked structure, where, at least one structure corresponds in idealized form to formula I,
- (R2O)[(R2O)1-x(R3)xSi(B)O]b[Si(C)(R5)y(OR4)1-yO]c[Si(D)2O]dR6.(HX)e (I)
- where
- B independently corresponds to an aminoalkyl radical of formula IVa or IVb
- R10h*NH(2-h*)[(CH2)h(NH)]j[(CH2)l(NH)]n—(CH2)k— (IVa),
- in which h, l, and k independently of one another correspond to integers;
- 0≦h≦6, 0≦l≦6;
- 0≦k≦6, h*=0, 1 or 2, j=0, 1 or 2;
- n=0, 1 or 2;
- and R10 corresponds to a benzyl, aryl, vinyl or formyl radical or to a linear, branched or cyclic alkyl radical having 1 to 8 C atoms,
- [NH2(CH2)m]2N(CH2)p— (IVb),
- where m and p correspond to integers, with 0≦m≦6 and 0≦p≦6,
- C corresponds to a linear, branched or cyclic alkyl radical having 1 to 20 C atoms,
- D independently in each case corresponds to a linear, branched or cyclic alkyl radical having 1 to 8 C atoms, and
- where R2, R4 and R6 are hydrogen, and
- R3 and R5 independently correspond to a linear, branched or cyclic alkyl radical having 1 to 4 C atoms, or an aryl radical, and
- HX represents an acid, where X is an inorganic or organic acid radical,
- with x=0 or 1, y=0 or 1, b, c, d, and e integers
- with b≧1, c≧0, d≧0, e≧0, with the proviso that (c+d)≧1
- where on crosslinking, the cocondensate releases substantially no alcohol, and
- (ii) a bis(alkoxysilyl)amine of formula II
- (OR1)3-z(R7)zSi-A-Si(R7)z(OR1)3-z (II),
- where A is a divalent amine, R1 independently is hydrogen or a linear, branched or cyclic alkyl radical having 1 to 4 C atoms, and R7 independently is a linear, branched or cyclic alkyl radical having 1 to 6 C atoms, with z=0 or 1;
- or a hydrolysis or condensation product thereof.
21 more elements
Dependencies are inferred from the claim text.