EP3172286A1

EP3172286A1 - Aqueous coating agents

Info

Publication number: EP3172286A1
Application number: EP16738425.4A
Authority: EP
Inventors: Frank Sandmeyer; Albert Hausberger; Martin Sebald
Original assignee: Wacker Chemie AG
Current assignee: Wacker Chemie AG
Priority date: 2015-07-30
Filing date: 2016-07-13
Publication date: 2017-05-31
Also published as: DE102015214501A1; KR20170039233A; CN106715617A; WO2017016871A1; US20170283654A1; JP2017533974A

Abstract

The invention relates to silicone resin dispersions containing at least one silicone resin having at least two differently substituted T-units and to aqueous coating agents for mineral construction materials, wood or metal, which can be produced therefrom.

Description

Aqueous paints

The invention relates to silicone resin dispersions comprising at least one silicone resin having at least two differently substituted T units and aqueous paints which can be prepared therefrom for mineral building materials, wood or metal.

The protection of building materials against the damaging effects of water is for long-term conservation of water

Performance and thus the longtime resistance of a building material of essential importance. Accordingly, there are numerous methods for protecting building materials against water. Coatings and impregnations occupy a particularly important position in the family of these

Protective measures, since they are easy to use and thus offer special benefits for the user. In addition, coatings are required that they are ecological and

are sustainable, ie free of toxicologically harmful or environmentally incompatible substances. You have to have a good one

Have substrate adhesion and good cohesive properties.

In addition, they should be permeable to water vapor, but at the same time effectively block the passage of liquid water. Furthermore, building coatings must themselves be durable and aesthetically pleasing.

In order to achieve this property profile, the use of silicone resins as binders or co-binders in construction paints has been frequently proposed. EP1034209B1 teaches the use of aqueous

Silicone resin dispersions as a construction coating agent. The

Silicone resin dispersions contain as active ingredient silicone resins, which are predominantly composed of T units and, moreover, can contain M, D and Q units. They are hydroxy-functional, being at least 0.05% by weight Contain hydroxy groups. In addition, other components are contained in the dispersions, which serve, inter alia, the curing and emulsification of the resin. The

silicone resin dispersions according to the invention become

Formulation of water-repellent building paints used.

In US5316799 is a hydrophobic impregnating agent

described containing a silane or linear siloxane and which is applied in admixture with a color. The entire system is water repellent so surface hydrophobic.

EP0606671A1 describes organopolysiloxane resin, filler and alkoxysilane and, optionally, alkoxysiloxane-containing emulsions which are applied to mineral building materials for hydrophobization. The silicone resins are MQ or MDQ resins. The fillers have a specific

Surface of at least 40m ² / g and are added in small quantities. EP0616989A1 teaches a hydrophobing agent as an aqueous impregnating emulsion for mineral building materials, which has a

Mixture of alkylalkoxysilanes and Alkyalkoxysiloxanen in a mixing ratio of 0.5: 1 to 0.98: 1 included. The alkylalkoxysilanes are substituted with alkyl radicals of different lengths. The alkylalkoxysiloxanes are made

alkyl-substituted T and D units composed. There are different alkyl substituents on the respective

Silicone units approved. Because of the inaccurate disclosure of the alkylalkoxysiloxane moiety, its structure is not clear, but the information offered suggests that the T moieties have alkyl substituents of greater than 3 carbon atoms in length and the D moieties have mixtures of short and long chain Alkyl radicals can be substituted. Two different alkyl-substituted T units are not recognizable. Included in the invention Alkyltrialkoxysilanes in the mixture, so that basically two different substituted silicon species in the

Mixture are present, which are each surrounded by three oxygen atoms and carry different alkyl radicals. The

Dosage form, however, is not a homogeneous molecule, in which these two units are combined by chemical combination, but it is a mixture of the two different silicon species. The

aqueous impregnating emulsion of the invention causes a water barrier effect by forming a

Surface hydrophobicity.

EP1844120B1 teaches high viscosity aqueous emulsions as

Hydrophobing agent for mineral building materials containing 50-90% of functional alkoxysilanes and / or their oligomers and / or organoalkoxysiloxanes. If it is at the

functional alkoxysilanes are alkyl-substituted, the alkyl radicals comprise at least 3 carbon atoms. Both

Organoalkoxysiloxanes are linear siloxanes which may contain a Si-C bonded radical, wherein

basically different alkyl or aralkyl-substituted silicon atoms may contain. Moreover, at each

chain silicon atom in each case an alkoxy group

bound, at the chain terminals are bound each of two. This substitution pattern gives rise to a

Chain structure consisting exclusively of D units. The

Organoalkoxysiloxanes are correspondingly very high

alkoxy-functional. The viscosity of the high-viscosity emulsions is not limited, however, the application examples prove that they are pasty systems. The emulsions described act surface-hydrophobic.

EP0098940A2 teaches containing aqueous preparations

Polyorganosiloxane compounds. The polyorganosiloxanes are alkoxy-rich partial hydrolysates, if appropriate various alkoxysilanes, wherein the silicon atoms with different Si-C-bonded alkyl radicals or aralkyl radicals or mixtures thereof may be susbtituiert. The

aqueous preparations are prepared by the

Silane hydrolyzate with an aqueous preparation of

Polyvinyl alcohol is added and then strongly acidified. Under these conditions, they hydrolyze and condense

Partial hydrolysates and thereby form significant amounts of alcohol contained in the final product. This results in aqueous preparations with possibly critical

Flash points that inevitably contain alcohols that may be toxic, for example, by methanol. The

Siloxane condensates are poorly defined. Accordingly, EP0098940 also gives no information on the composition of

Siloxane condensates after the preparation of the aqueous

Preparations. While the aqueous formulations are said to be stable, those skilled in the art will recognize that the criterion for the stability of such a preparation is the formation of alcohol during storage. Since alcohols are already produced in an unknown amount in the production process, the concept of stability is incomprehensible and arbitrary. As a possible application for the aqueous

Preparations are given paints, the

Suitability of the aqueous preparations according to the invention due to the inherent toxicological, safety and environmental disadvantages very questionable, if not completely excluded.

EP0287085 relates to hydrophobic, aqueous silicone-containing coating systems which use as a binder a mixture of

Organopolysiloxane and ethylene-vinyl chloride copolymers

contain. Example 1 describes such a hydrophobic silicone resin ink containing a silicone resin containing both methyl and iso-octyl groups as Si-C linked moieties on monalkylsiloxane units. Because the rest Substitution pattern is not revealed, it can only be deduced that they are units that have only one silicon-bonded alkyl group. Otherwise, it is only disclosed by this organopolysiloxane that it is a

hydrophobic aqueous paint.

The silicone components in the above-described prior art are always used to adjust hydrophobic, in particular surface hydrophobic properties, which usually show up as a beading effect. Such tests are isolated for the detection of the claimed hydrophobicity

used. This means that water can not wet the surface, but contracts to drips. It is well known and easily understood that a compact droplet evaporates more slowly than a water film of the same amount of water uniformly distributed over a larger area. Therefore, by the pronounced hydrophobicity of the silicone components, the passage of water through a coating or impregnation can be prevented, but the surface at the points where the water collects in droplets remains moist for longer and thus provides a lighter point of attack for microorganisms can use the sites of increased moisture to their growth. In this way, pronounced hydrophobicity, where the evaporation of moisture from the surface is not promoted by particularly advantageous conditions such as wind and heat, leads to an increased risk of attack by microorganisms and thus damage to the surface and loss of both its protective also their aesthetic properties.

However, hydrophobicity has the distinctly positive property of preventing the passage of liquid water through the particular coating, leaving the underlying substrate dry, and so on

Sustained efficiency in the long run. This is true both mineral substrates to as well as wood and metal. In the case of the latter, the water barrier effect makes a significant contribution to the prevention of corrosion. A combination of a rather hydrophilic surface and still good water blocking effect of the coating would be ideal, so moisture management instead of pure

Hydrophobicity. Since such properties are exclusive, it is not obvious that they can be achieved with a product and above all by applying only one kind of paint. Rather, one expects such

Combination of a minimum two-coat application using different paints, each of which has one of the two functions Water barrier effect and

Surface hydrophilicity takes over.

In addition, the writings cited above mention the slow ones

Curing of silicone resins, some catalysts and activators are recommended for their acceleration, such as in EP1034209B1. During the cure time of the siloxane components, the full performance of the silicone is neither in

mechanical still given in terms of water-barrier effect.

Another disadvantage of the prior art siloxane dispersions is the fact that the emulsifiers needed to stably maintain the silicone in the aqueous phase remain in the paint after its application and its

Reduce water barrier effect due to their hydrophilicity in the first time after application. Only after the emulsifiers are washed out, such colors reach their full

Water barrier effect.

The object of the present invention was therefore aqueous

To provide siloxane dispersions, which do not have the disadvantages mentioned above, ie in particular already show the full water-blocking effect of the paint immediately after the application of paint, as well as the full mechanical performance, whereby the overall level of performance of the paint fully meets the other requirements. The siloxane dispersions should give paints that have no hydrophobic surface, but allow the spreading of water to a film as thin as possible and thus promote its rapid evaporation to keep the surface permanently dry. That means they should not give a beading effect. At the same time they should effectively prevent the passage of water through the paint film and they should all these properties by the application of only one kind of paint after a single

Provide shift order.

Surprisingly, it was found that certain

Silicone resins as aqueous siloxane dispersions, solve this task. This is surprising in particular because similar silicone resins are already known in the prior art, but all of which always have hydrophobic properties and result in correspondingly hydrophobic coating agents. The silicone resins according to the invention and their dispersions are therefore a special selection of silicone resins which run counter to those in the hitherto known prior art and have completely unexpected properties.

In the present text, substances are characterized by specification of data obtained by instrumental analysis. The underlying measurements are either

following publicly available standards or identified according to specially developed procedures. To ensure the clarity of the teaching provided, the ones used are

Methods given here: Viscosity:

Unless stated otherwise, the viscosities are determined by rotational viscometric measurement in accordance with DIN EN ISO 3219. Unless otherwise stated, all apply

Viscosity data at 25 ° C and atmospheric pressure of 1013 mbar.

Refractive index:

The refractive indices are in the wavelength range of

visible light, unless otherwise indicated at 589 nm at 25 ° C and normal pressure of 1013 mbar according to DIN 51423.

Transmission:

The transmission is determined by UV VIS spectroscopy. A suitable device is, for example, the Analytik Jena Specord 200.

The measurement parameters used are: Range: 190 - 1100 nm Increment: 0.2 nm, Integration time: 0.04 s, Measurement mode:

Step operation. First, the reference measurement

(Background). A quartz plate attached to a sample holder (dimension of the quartz plates: HxB approx. 6 x 7 cm, thickness approx. 2.3 mm) is placed in the sample beam path and measured against air. Thereafter, the sample measurement takes place. One on the sample holder

attached quartz plate with applied sample - layer thickness applied sample approx. 1 mm - is placed in the sample beam path and measured against air. Internal offsetting against background spectrum provides the transmission spectrum of the sample.

Molecule compositions:

The molecular compositions are by means of

Nuclear Magnetic Resonance Spectroscopy (for terms see ASTM E 386: High Resolution Magnetic Nuclear Magnetic Resonance (NMR): terms and symbols), measuring the ¹ H nucleus and the ²⁹ Si nucleus.

Description ¹ H-NMR measurement

Solvent: CDC1 ₃ , 99.8% d

Sample concentration: approx. 50 mg / 1 ml CDC1 ₃ in 5 mm NMR

Tube Measurement without addition of TMS, spectral referencing of residual CHC1 ₃ in CDCl ₃ to 7.24 ppm

Spectrometer: Bruker Avance I 500 or Bruker Avance HD 500 Probe head: 5 mm BBO probe head or SMART probe head (Bruker)

Measuring parameters:

Pulprog = zg30

TD = 64k

NS = 64 or 128 (depending on the sensitivity of the

Probe head)

SW = 20.6 ppm

AQ = 3, 17 s

Dl = 5 s

SFOl = 500.13 MHz

Oil = 6.175 ppm

Processing parameters:

SI = 32k

DW = EM

LB = 0.3 Hz Depending on the spectrometer type used, individual adjustments of the measuring parameters may be necessary.

Description ²⁹ Si-NMR measurement

Solvent: C ₆ D ₆ 99.8% d / CCl ₄ 1: 1 v / v with 1 wt% Cr (acac) ₃ as a relaxation reagent

Sample concentration: approx. 2 g / 1.5 ml solvent in 10 mm NMR

tube

Spectrometer: Bruker Avance 300

Probe head: 10 mm 1H / 13C / 15N / 29Si glass-free QNP probe head

(Bruker)

Measurement parameters:

Pulprog = zgig60

TD = 64k

NS = 1024 (depending on the sensitivity of the probe head) SW = 200 ppm

AQ = 2.75 s

Dl = 4 s

SFOl = 300.13 MHz

Oil = -50 ppm

Processing parameters:

SI = 64k

DW = EM

LB = 0.3 Hz

Depending on the spectrometer type used, individual adjustments of the measuring parameters may be necessary.

Molecular weight distributions:

Molecular weight distributions are determined as weight average Mw and as number average Mn, the method of Gel permeation chromatography (GPC or Size Exclusion

Chromatography (SEC) application is with polystyrene standard and refractive index detector (RI detector). Unless otherwise stated, THF is used as the eluent and DIN 55672-1 is used. The polydispersity is the quotient Mw / Mn.

Glass transition temperatures:

The glass transition temperature is determined by differential scanning calorimetry (DSC) according to DIN 53765, perforated Tigel, heating rate 10 K / min.

Object of the invention:

The subject of this invention are thus aqueous

Containing silicone resin dispersions

(A) 10 - 70% by weight of at least one liquid silicone resin at room temperature (25 ° C)

from at least 50% repeat units of the formula (1)

R ¹ (R ² 0) _b SiO ₍₃ -b / 2) (1) where

R ¹ Cl C20 hydrocarbon radicals which carry no or at least one heteroatom, R ² Cl - C6 hydrocarbon radicals or a

Hydrogen radical mean, and

b is the value 0, 1 or 2, and 0 to at most 50% repeating units of the formula (2),

R ⁸ c (R ² 0) _d SiO (4-cd / 2) (2), where R independently of one another Cl - C20

Hydrocarbon radicals mean

R ^{2 has} the meaning given above,

c can be 0, 2 or 3,

d can be 0, 1, 2 or 3,

with the proviso that c + d <· 3, characterized in that

the silicone resins at least 2 from each other

contain different repeat units of the formula (1) in the ratio of 1: 100 to 100: 1, which carry at least 2 mutually different radicals R ¹ , which differ by at least one hydrocarbon member in their length or size,

-5% to 35% of all silicon-bonded substituents in formula (1) are those of the partial formula (R ² O) in which R ^{2 is} a C 1 -C 6 hydrocarbon radical,

at most 5% of all silicon-bonded substituents in formula (1) are those of the partial formula (R ² O) in which R ^{2 is} a hydrogen radical,

in at least 5% of all repeat units of the formula (1) b = 0,

in at least 5% of all repeat units of the formula (1) b = 1,

in at most 25% of all repeat units of the formula (1) b = 2,

B) 0-2% by weight of at least one organopolysiloxane containing SiC-bonded radicals with basic nitrogen, with the proviso that its amine number is at least 0.01,

(C) 0.1-30% by weight of at least one dispersing agent,

(D) 10 to 70% by weight of water, (E) 0.01-10% by weight of at least one adjuvant, and

(F) 0 to 6% by weight of at least one alkylalkoxysilane whose alkyl radicals are C 1 -C 20 -alkyl radicals and whose alkoxy groups consist of oxygen-bonded C 1 -C 6 -alkyl radicals.

Preferably, the silicone resin dispersion has a viscosity between 10 and 50,000 mPas, particularly preferably 20-10,000 mPas, in particular 20-5,000 mPas at 25 ° C.

The silicone resin dispersions of the invention can also be formulated by suitable selection of the preparation components and their relative amounts so that they do not give liquid emulsions, but pasty aqueous

Preparations which have the dosage form of a cream and have viscosities of more than 100,000 mPas at 25 ° C.

The silicone resin dispersions according to the invention are prepared by the known processes according to the prior art. From the silicone resin dispersions according to the invention, aqueous coating compositions according to the invention are also obtained by processes according to the prior art. The production of

Aqueous, paint according to the invention is carried out according to known methods of the prior art and is characterized in that at least one inventive

Silicone resin dispersion is mixed.

In a process for coating and obtaining the advantageous properties of the invention

Paints on mineral building materials, wood or metal, the inventive aqueous paint on

mineral building materials, wood or metal applied.

The most important paints according to the invention are

Paints, varnishes, paints and plasters and are on mineral building materials, wood or metal applied. It is a special feature of the invention

Silicone resin dispersions that they give aqueous coatings for mineral building materials, wood or metal, characterized in that the water barrier effect of the paints without washing out of the emulsifiers already achieved a value in class 3 according to DIN EN 1062-3 (<0.1 kg / m ² h ^0.5 ). The mechanical strength tested according to DIN 53778-2 reached 4 days after

Application determines a value of> 10,000 scrub cycles.

In addition, no beading effect is obtained on one

Surface hydrophobicity points, but a drop of water which is placed on the surface, spreads over this, but without penetrating into the ink layer or through them. That is, give the paints of the invention

Coatings that simultaneously spread water on the surface and have a pronounced water barrier effect. The aqueous paints are preferred

Paints and glazes, in particular paints.

The paints suitable for the purposes of the invention are supplied either dry, but in the form of a

aqueous preparations, such as powder paints and powdered dry plasters or are wet, such as pasty, water-based paints, such as silicone resin paints, silicate paints and emulsion paints or pasty,

aqueous plasters, such as synthetic resin plasters and

Silicone resin plasters. The impregnating suitable for the purposes of the invention

Paints can be classified according to application strength and are applied thickly, such as plasters in the millimeter to

Centimeter range, or are applied thinly, such as opaque paints and varnishes in 100 μιτι to 1 millimeter range, or translucent to opaque as impregnating and thin and Thick-film glazes in the 3 pm to 100 pm range.

The impregnating paints suitable for the purposes of the invention may be used both internally and externally, preferably externally. Examples of paints according to the invention used on buildings are silicate plasters,

Dry plasters, coating fillers, reinforcing compounds, fillers, resin plasters, mineral plasters, silicone resin plasters and

resin-bonded coatings. Preferred examples are interior paints, facade paints, mineral paints, emulsion paints, silicone resin paints, silicone facade paints, glazes, paints, dispersion silicate paints, silicate paints, lime paints and

Dispersion lime paints. Silicone Resins (A)

Examples of the hydrocarbon radicals R ¹ are alkyl radicals, in particular C ¹ -C 3 -alkyl radicals, and also C 2 -C 20 -alkyl radicals and alkenyl radicals, such as the vinyl, allyl, η 5-hexenyl, 4-vinylcyclohexyl and 3-norbornenyl radical; Aryl radicals, such as the phenyl, biphenylyl, naphthyl and anthryl and

Phenanthryl residue; Alkaryl radicals, such as o-, m-, p-tolyl radicals,

Xylyl radicals and ethylphenyl radicals; Aralkyl radicals, like the

Benzyl, the alpha- and beta-phenylethyl. Particularly preferred are the non-heteroatom-substituted C 1 -C 20 -alkyl radicals and aryl radicals. In particular, C 1 -C 16 -alkyl radicals without heteroatoms, especially the methyl, the ethyl, the n-octyl and the iso-octyl radical.

The ratio of the two different

Repeating units (1) to each other is 1: 100 to 100: 1, preferably 1:99 - 99: 1, more preferably 1:97 to 97: 1, in particular 1:96 to 96: 1.

It is preferred and has. to be particularly advantageous

proved when the repeat unit (1) with the carbon-rich substituent to not more than 75 mol% of all repeating units of the formula (1) is present.

Conversely, this means that the repeating unit (1) having the lower-carbon substituent is present in not less than 25 mol% of all repeating units of the formula (1). In a particularly preferred embodiment of the

Invention are the repeat units of formula (1) with the lower carbon number substituent in the majority, i. to more than 50 mol% of all repeat units of the formula (1).

Examples of particularly preferred combinations of radicals R ¹ are those R ¹ is selected such that a combination of at least one C ¹ -C 20 -alkyl radical without heteroatoms with

at least one aryl radical takes place, such as phenyl radical and

Methyl radical, the phenyl radical and the ethyl radical, iso-octyl radical and the phenyl radical, the n-octyl radical and the phenyl radical. Further preferred combinations of two different C1-C16-alkyl radical without heteroatoms are the n-butyl radical and the

Ethyl, n-butyl and methyl, ethyl and methyl, n-octyl and methyl, iso-octyl and methyl, n-octyl and ethyl, iso-octyl and ethyl. Where the combination of phenyl and methyl, ethyl and

Methyl radical, iso-octyl radical and methyl radical, ethyl radical and iso-octyl radical and phenyl radical and iso-octyl radical in particular

are advantageous. A combination of methyl and iso-octyl radicals and of methyl and phenyl radicals as the two different radicals R ¹ has proven to be particularly effective. It is the combination of iso-octyl and

Methyl radical preferred that more repeat units of the formula (1) are present, the methyl radicals carry as those carrying iso-octyl radicals. Preferably, the ratio of the number of repeating units of the formula (1) is the

Methyl radicals to the number of repeat units of the formula (1), the iso-octyl radicals carry 51:49 to 99: 1, particularly preferably 55:45 to 98: 2, in particular 60:40 to 98: 2.

They have proved to be particularly effective 60:40, 70:30, 90:10 and 95: 5.

In the combination of phenyl radicals and methyl radicals, the following ratios of the number of repeating units of the formula (1) are the methyl radicals to the number of

Repeating units of the formula (1), the phenyl radicals are particularly preferably: 98: 2 to 10:90, particularly preferably 98: 2 to 20:80, in particular 98: 2 to 30:70. As special

Advantageously, ratios in the ranges 98: 2 - 70:30 and 25:75 - 40:60 have been found, in particular 97: 3, 95: 5, 90:10, 70:30, 35:65 and 45:55.

The combination of more than two different radicals is possible and according to the invention. In this case, the preferred ratios given above for the combination of two different radicals apply mutatis mutandis, if the

of high-carbon substituted repeating units and relates to the repeat unit, the smallest, or the least

carrying carbon-rich substituents, to be distinguished in the manner outlined above, between

Combinations involving aromatic substituents and those without aromatic substituents.

Even in the case that more than two different ones

Repeating units of the formula (1) are present are

Combinations of the methyl, ethyl, phenyl, n-butyl, n-octyl, iso-octyl preferred, in particular of methyl, ethyl, phenyl and iso-octyl, especially of methyl, phenyl and iso-octyl are preferred ,

Examples of the radicals R ² are the methyl, ethyl, n-propyl, isopropyl, n-butyl, sec-butyl, and tert. Butyl radical; Pentyl radicals, such as the n-pentyl radical and hexyl radicals, such as the n-hexyl radical, wherein the ethyl radicals are particularly preferred.

Preferably, (A) from 10 to 65 wt .-%, particularly preferably from 25 to 60 wt .-%, in the silicone resin dispersion.

Organopolysiloxane (B)

The organopolysiloxanes (B) are preferably those of

Units of the general formula (4)

R ³ a * R ⁴ b * (OR ⁵ ) _c * SiO ( ₄ -a * -b * -c *) / ₂ (4) in the

R ^{3 is the} same or different monovalent, of basic

Nitrogen-free, halogen-substituted or non-halogen-substituted, SiC-bonded C ₁ -C 20 -hydrocarbon radicals,

R ^{4 represents} identical or different monovalent, halogen-substituted or non-halogen-substituted, SiC-bonded basic nitrogen-containing C 1 -C ₃₀ -hydrocarbon radicals,

R ^{5 is} identical or different from a hydrogen atom or C ₁ -C ₆ -alkyl radicals,

a * 0, 1, 2 or 3,

b * 0, 1, 2 or 3, on average at least 0.05 and c * 0, 1, 2 or 3,

mean,

with the proviso that the sum of a *, b * and c * is at most 3 and that the amine number of the organopolysiloxane (B)

is at least 0.01.

The amine number refers to the number of ml of 1-n-HCl required to neutralize 1 g of organopolysiloxane (B). The amine value of the organopolysiloxane (B) is preferably at least 0.1, in particular at least 0.2, and preferably at most 8, in particular at most 4. Examples and preferred examples of the radical R ³ are the examples already disclosed above for the radical R ¹ .

In particular, the methyl and iso-octyl radicals are preferred for the radical R ³ .

The radical R ⁴ is preferably a radical of

general formula (3)

R ⁶ ₂ NR ⁷ (3) where

R ^{6 may be} identical or different and is hydrogen or a monovalent, substituted or unsubstituted C 1 -C 10 -hydrocarbon radical or C 1 -C 10 -aminocarbon radical and

R ^{7 is} a divalent Ci-C ₁₅ hydrocarbon radical

mean.

Examples of radical R ⁶ are the radicals R ¹ already above for the radical R ¹ disclosed examples of hydrocarbon radicals and amino-substituted hydrocarbon radicals, such as aminoalkyl radicals, wherein the aminoethyl radical particularly

is preferred. Preferably, at least one hydrogen atom is bonded to each nitrogen atom in the radicals of general formula (3).

Preferably, R ⁷ is divalent

Hydrocarbon radicals having 1 to 10 carbon atoms,

particularly preferably 1 to 4 carbon atoms, in particular the n-propylene radical.

Examples of radical R ⁷ are the methylene, ethylene, propylene, butylene, cyclohexylene, octadecylene, phenylene and

Butenylene radical. Preferred examples of radicals R ⁴ are

H ₂ N (CH ₂ ) ₃ -,

H ₂ N (CH ₂ ) ₂ NH (CH ₂ ) ₂ -,

H ₂ N (CH ₂ ) ₂ NH (CH ₂ ) ₃ -,

H ₂ N (CH ₂ ) ₂ -,

H ₃ CNH (CH ₂ ) ₃ -,

C ₂ H ₅ NH (CH ₂ ) ₃ -,

H ₃ CNH (CH ₂ ) ₂ -,

C ₂ H ₅ NH (CH ₂ ) ₂ -,

H ₂ N (CH ₂ ) ₄ -,

H ₂ N (CH ₂ ) ₅ -,

H (NHCH ₂ CH ₂ ) ₃ -,

C ₄ H ₉ NH (CH ₂ ) ₂ NH (CH ₂ ) ₂ -,

cyclo-C ₆ HiiNH (CH ₂ ) ₃ -,

cyclo-CgHuNHiCHaJa-,

(CH ₃ ) ₂ N (CH ₂ ) ₃ -,

(CH ₃ ) ₂ N (CH _{2) 2} -,

(C ₂ H ₅ ) ₂ N (CH ₂ ) ₃ - and

(C ₂ H ₅ ) ₂ N (CH ₂ ) ₂ -.

The examples of alkyl radicals R ^{1 also} apply in their entirety to the radical R ⁷ .

Examples and preferred examples of the radical R ⁵ are Cl-C6-REste listed above for radical R ¹ . In particular, the methyl and ethyl radicals are preferred. The preferred average value for a is 0 to 2, especially 0 to 1.8.

The preferred average value for b is 0.1 to 0.6, especially 0.15 to 0.30. The preferred average value of c is 0 to 0.8, especially 0.01 to 0.6.

Preferably, the organopolysiloxanes (B) have a viscosity of from 5 to 5000, in particular from 100 to 3000 mm ² / s at 25 ° C.

Organopolysiloxanes (B) can be prepared in a known manner,

For example, by equilibrating or condensing amino-functional silanes with organopolysiloxanes, the

Alkoxy groups and / or hydroxyl groups and which are free of basic nitrogen can be produced.

Preferably, (B) is from 0.05 to 2% by weight, more preferably from 0.1 to 1.5% by weight, contained in the silicone resin dispersion.

(C) dispersing agent

The aqueous silicone resin dispersion contains

Dispersing agent (C) as for example in 2006

McCutcheon's Emulsifiers & Detergents, North American Edition, MC Publishing Co., Glen Rock, N.J. are named. Particularly suitable as anionic emulsifiers (Cl) are:

1. Alkyl sulfates, especially those having a chain length of 8 to 18 carbon atoms, alkyl and Alkarylethersulfate with

8 to 18 carbon atoms in the hydrophobic radical and 1 to 40

Ethylene oxide (EO) - or propylene oxide (PO) units.

2. sulfonates, especially alkyl sulfonates having 8 to 18 carbon atoms, alkylaryl sulfonates having 8 to 18 carbon atoms, taurides,

Ester and half ester of sulfosuccinic acid with

monohydric alcohols or alkylphenols having 4 to 15 carbon atoms; optionally, these alcohols or

Alkylphenols also ethoxylated with 1 to 40 EO units be .

3. alkali metal and ammonium salts of carboxylic acids having 8 to 20 carbon atoms in the alkyl, aryl, alkaryl or aralkyl radical.

4. Phosphorsäurestsester and their alkali and

Ammonium salts, especially alkyl and alkaryl phosphates having 8 to 20 carbon atoms in the organic radical, alkyl ether or

Alkaryl ether phosphates having 8 to 20 carbon atoms in the alkyl or alkaryl radical and 1 to 40 EO units. as nonionic emulsifiers (C2):

5. polyvinyl alcohol, which still has 5 to 50%, preferably 8 to 20%, Vinylacetateinheiten, with a

Degree of polymerization of 500 to 3000.

6. Alkylpolyglycolether, preferably those having 8 to 40 EO units and alkyl radicals of 8 to 20 carbon atoms.

7. Alkylarylpolyglycolether, preferably those having 8 to 40 EO units and 8 to 20 carbon atoms in the alkyl and aryl radicals.

8. Ethylene oxide / propylene oxide (EO / PO) block copolymers, preferably those having 8 to 40 EO or PO units.

9. Addition products of alkylamines having alkyl radicals of 8 to 22 carbon atoms with ethylene oxide or propylene oxide.

10. Fatty acids with 6 to 24 carbon atoms.

11. Alkylpolyglykoside of the general formula R * -O-Z _o , wherein R * is a linear or branched, saturated or unsaturated alkyl radical having an average of 8 - 24 carbon atoms and Z _{0 is} an oligoglycoside radical with on average o = 1-10 hexose or pentose units or mixtures thereof.

12. Natural products and their derivatives, such as lecithin, lanolin, saponins, cellulose; Cellulose alkyl ethers and

Carboxyalkylcelluloses whose alkyl groups each have up to 4 carbon atoms.

13. Linear groups containing polar groups

Organo (poly) siloxanes, especially those with

Alkoxy groups having up to 24 carbon atoms and / or up to 40 E0 and / or PO groups. as cationic emulsifiers (C3):

14. Salts of primary, secondary and tertiary fatty amines having 8 to 24 C atoms with acetic acid, sulfuric acid,

Hydrochloric acid and phosphoric acids.

15. Quaternary alkyl and alkylbenzene ammonium salts, especially those whose alkyl group has 6 to 24 carbon atoms, in particular the halides, sulfates, phosphates and acetates.

16. Alkylpyridinium, alkylimidazolinium and

Alkyloxazolinium salts, in particular those whose

Alkyl chain has up to 18 carbon atoms, especially the

Halides, sulfates, phosphates and acetates. as ampholytic emulsifiers (C4):

17. Long-chain substituted amino acids, such as N-alkyl-di- (aminoethyl) glycine or N-alkyl-2-aminopropionsäuresalze.

18. Betaines, such as N- (3-acylamidopropyl) -N, N-dimethylammonium salts with a C 8 -C 18 acyl radical and alkyl imidazolium betaines. Preferred dispersants are nonionic

Emulsifiers (C2), in particular those mentioned above under 9.

listed addition products of alkylamines with ethylene oxide or propylene oxide, listed under 11 above

Alkyl polyglycosides and the polyvinyl alcohol listed under 5. above. Particularly preferred polyvinyl alcohols still contain 5 to 20%, in particular 10 to 15%,

Vinylacetateinheiten and preferably have one

Degree of polymerization of 500 to 3000, especially from 1200 to 2000, on.

The proportion of the dispersing assistant (C) is preferably 1 to 30 wt .-%, in particular 2 to 10 wt .-%, based on the total amount of silicone resin dispersion.

Water (D)

Furthermore, the inventive aqueous

Silicone resin dispersions water (D), preferably from 10 to 70 wt .-%, in particular 15 to 60 wt .-%, based on the

Total amount of silicone resin dispersion.

Auxiliaries (E)

As adjuvants (E) it is possible to use all auxiliaries hitherto used in the prior art, for example emulsifiers for the homogeneous, stable dispersion of

Silicone resin formulation in water. Further auxiliaries are, for example, silicone resins which differ from (A) or polyorganosiloxanes which differ from (B), silanes which differ from (F), organic solvents,

Wetting aids, film-forming aids, antifoam agents,

Adhesion promoters, flow control agents, crosslinking catalysts, pH adjusters, preservatives, solubilizers. The proportion of auxiliaries (E) is preferably 0.1 to 10 wt .-%, in particular 0.1 to 8 wt .-%, based on the

Total amount of silicone resin dispersion. AIky1alkoxysi 1an (F)

The C 1 -C 20 -alkyl-C 1 -C 5 -alkoxysilanes (F) preferably have 1 or 2 identical or different, if appropriate

halogen-substituted, SiC-bonded monovalent Ci-C ₂₀ - alkyl radicals and the remaining radicals are identical or different C1-C6 alkoxy, in particular C ₂ - or C ₃ -alkoxy radicals.

Particularly preferred are the alkyltrialkoxysilanes, such as

Octyltriethoxysilane and butyltriethoxysilane.

Examples of C ₂ -C ₃ -alkoxy radicals are the ethoxy, n-propoxy, isopropoxy radical. The ethoxy radicals are particularly preferred.

Methoxysilanes hydrolyze too fast for many applications and have a shorter shelf life than longer ones

Alkoxy radicals on. C ₄ -C ₆ -alkoxy radicals are too slow to react for many applications.

Examples of the C 1 -C ₂₀ -alkyl radicals in (F) are the methyl, ethyl, n-propyl, iso-propyl, n-butyl, isobutyl, tert-butyl, n-butyl Pentyl, iso-pentyl, neo-pentyl, tert. -Pentyl radical; Hexyl radicals, such as the n-hexyl radical; Heptylreste, like the n-

heptyl; Octyl radicals, such as the n-octyl radical and iso-octyl radicals, such as the 2, 2, 4-trimethylpentyl radical; Nonyl radicals, such as the n-nonyl radical; Decyl radicals, such as the n-decyl radical and dodecyl radicals, such as the n-dodecyl radical; Cycloalkyl radicals, such as cyclopentyl,

Cyclohexyl, 4-ethylcyclohexyl, cycloheptyl radicals,

Norbornyl radicals and methylcyclohexyl radicals.

Examples of halogen-substituted C; _L --C _2O alkyl radicals are substituted by fluorine, chlorine, bromine and iodine atoms, such as 3, 3, 3-trifluoro-n-propyl, 2,2,2,2 ', 2', 2 '- Hexaf luorisopropylrest and Heptaf luorisopropylrest.

Particularly preferred are the unsubstituted C ₄ -C ₂ alkyl radicals.

If the (Ci-C ₂₀ ) -alkyl- (C ₂ -C ₃₎ -alkoxysilane (F), which as

Priming impregnating agent is present in the organopolysiloxane according to the invention, it is preferably in amounts of 0.05 to 0.95% based on the total aqueous preparation of the paint contained. Preferably (F) contains between 0.1 to 0.8% by weight, more preferably 0.1 to 0.5% by weight, in the aqueous paint.

The invention further coatings are prepared by applying the aqueous according to the invention

Paints.

The aqueous silicone resin dispersions according to the invention are suitable both for impregnation of porous substances, as described e.g. be used in Elektroisolierstof fbereich (e.g.

Glass cloth, mica) as well as potting and investment materials. The aqueous silicone resin dispersions of the present invention have advantages due to the mild curing conditions, especially when processed together with temperature-sensitive components (e.g., electronic components, molds).

In addition, the inventive aqueous

Silicone resin dispersions also serve to manipulate other properties of preparations containing them or of solids or films obtained from aqueous Polyorganosiloxandispersionen invention, such. :

Control of electrical conductivity and electrical resistance

- Control of the flow properties of a preparation Control of the gloss of a wet or cured film or object

Increase the weathering resistance

Increase in chemical resistance

Increase in color stability

Reduction of the tendency to chalk

Reduction or increase in static friction and sliding friction on solids or films obtained from preparations containing an aqueous polyorganosiloxane dispersion according to the invention

Stabilization or de stabilization of foam in the

Preparation, the inventive aqueous

Contains polyorganosiloxane dispersions

Improve the liability of the preparation the one

According to the invention contains aqueous polyorganosiloxane, to substrates

Control of filler and pigment wetting and dispersing behavior,

Control of the rheological properties of the preparation comprising an aqueous according to the invention

Contains polyorganosiloxane,

Control of mechanical properties, e.g.

Flexibility, scratch resistance, elasticity, ductility, flexing ability, tear behavior, rebound behavior, hardness, density, tear propagation resistance, compression set, behavior at different temperatures, coefficient of expansion, abrasion resistance and other properties such as

Thermal conductivity, flammability, gas permeability,

Resistance to water vapor, hot air, chemicals, weathering and radiation, sterilizability, of

Solids or films obtainable from preparations containing an aqueous polyorganosiloxane dispersion according to the invention,

Control of electrical properties, e.g.

Dielectric strength, creep resistance, Arc resistance, surface resistance, specific breakdown resistance,

Flexibility, scratch resistance, elasticity, extensibility, bendability, tear behavior, rebound behavior, hardness, density, tear propagation resistance, compression set behavior at different temperatures of solids or films obtainable from the preparation containing aqueous polyorganosiloxane dispersions according to the invention. Examples of applications in which the aqueous silicone resin dispersions according to the invention can be used in order to manipulate the properties described above are the preparation of coating materials and impregnations and coatings and coatings to be obtained therefrom

Substrates, such as metal, glass, wood, mineral substrate, synthetic and natural fibers for the production of textiles,

Carpets, floor coverings, or other of fibers

manufacturable goods, leather, plastics such as films,

Moldings. The aqueous according to the invention

Silicone resin dispersions can be used in preparations

appropriate selection of the preparation components also as an additive for the purpose of defoaming, the flow promotion, hydrophobization, hydrophilization, filler and

Pigment dispersion, filler and pigment wetting,

Substrate wetting, promotion of surface smoothness, reducing the adhesion and sliding resistance can be used on the surface of the hardened mass available from the additized preparation. The aqueous according to the invention

Silicone resin dispersions may be in liquid or in

hardened solid form are incorporated in elastomer compositions. Here, they may be used for the purpose of enhancing or improving other performance characteristics such as control of transparency, heat resistance, yellowing tendency and weathering resistance. Examples

In the following examples, all parts and percentages are by weight unless otherwise specified. Unless otherwise indicated, the examples below are at a pressure of the ambient

Atmosphere, ie, at about 1013 mbar, and at room temperature, ie at about 25 ° C, or at a temperature which is when combining the reactants at room temperature without

additional heating or cooling adjusts, performed. All viscosity data given in the examples refer to a temperature of 25 ° C. The solids content of the emulsions is the sum of all components, with the exception of

Water. Me means a methyl radical (-CH ₃ ). Ph is a phenyl radical (-C ₆ H ₅ ). Et represents an ethyl radical (-CH ₂ -CH ₃ ). ⁱ Oct represents an iso-octyl radical = 2, 2, -Trimethylpentylrest. "E." means according to the invention and "NE" does not mean

according to the invention

Example 1: Preparation of an Inventive and a Non-Inventive Aqueous Silicone Resin Dispersion

The components listed below in tabular form produce a silicone resin dispersion according to the invention in analogy to the prior art, as described in EP1583790B1 and a noninventive invention. The amounts used are given in Table 1.

Table 1

Components Chemical Identity / E.N.E.

Manufacturer

Arlypon IT 5 polyoxyethylene (5) 5.64 g 5.64 g

isotridecylether (nonionic

Emulsifier, manufacturer

Cognis GmbH,

Illertissen)

Arlypon IT 10 Polyoxyethylene (10) 7.08 g 7.08 g isotridecyl ether

(nonionic

Emulsifier, manufacturer

Cognis GmbH Illertissen)

Water 12.18 + 12.18 +

100.14 g 100.14 g

Aminosiliconö 50 weight percent 2.85 g 2.85 g lemulsion aqueous dispersion

a polydiorganosiloxane whose

Organo groups 99.3%

from methyl groups

consist and to 0.7% off

N (2-aminoethyl) -3-amino-n-propyl groups and

its viscosity at

25 ° C 450 mm ² / s.

N. E. 1. Silicone Resin 1, 0.0g 171.0

Siliconharzzu

from 90 mol% MeSi0 _3/2 preparation,

only one unit (= T type of units) and 10 mol%

repeat

units of the Me ₂ Si0 _2/2 units

Formula (1), wherein 8 mol%

owns and

no EtO radicals and 2 mol%

Mixture of silicon-bonded HO- at least

two radicals are distributed over the T and D of such units,

Units with

Differli from which the

meaning of R ⁷

Kohl water

toffsubstitue and

nten: 2. silicone resin 2, the too

100% MeSi0 _3/2 - units (= T units),

wherein 20 mol% EtO radicals statistically on the T

Units of

Silicon resin 2 distributed

are, where from

Silicone resin 1 80

Weight percent and of

Silicone resin 2 20

Weight percent in the

Are present in the mix

and

3. calculated on the

Mass silicone resin 1 10

% by weight

Triethoxyisooctlysilan,

where the siloxane-silane

Preparation in water

is dispersed and you

Share in 100% of

Dispersion 50

Weight percent

E. Silicone resin from 90 mol% 171.00 g 0.0 g

silicone resin

MeSi0 _3/2 units and 10

mol% ⁱ OctSi0 _3/2 units, with 18 mol% EtO radicals and 1 mol%

HO residues statistically

these T-units

distributed

Preservative 10% solution of 2- 0.15 g 0.15 g

WITH 10

Methyl-4-isothiazolin-3-one in water

(Preservative,

Manufacturer Fa. Rohm and Haas)

PARMETOL A 28 Mixture of 5-chloro-2 - 0.72 g 0.72 g S

methyl-2H-isothiazol-3-one (CAS 26172-55-4) and

2-methyl-2H-isothiazole

3-on (CAS 2682-20-4)

(Preservative,

Manufacturer Fa. Schülke &

Mayr GmbH, Norderstedt)

Triethanolamine triethanolamine 0.24 g 0.24 g n

Example 2: Inventive and not inventive

Building protection coating with supercritical

Pigment Volume Concentration (PVK):

The following components were prepared by mixing with a fast rotating commercial rotor stator mixing device to a non-inventive invention and

Building protection coating mixed. The amounts used are given in Table 2.

Table 2

Component E.N.E.

Quantities in g quantities in g

Water 310 310

Pot preserver 2,0 2,0

Film conservator 10, 0 10, 0

Cellulose thickener 3.0 3, 0

PU thickener 2, 0 2, 0

Polyphosphate, sodium salt 2, 0 2, 0

Polyacrylate, sodium salt 2, 0 2, 0

Silicone Antifoam 3, 0 3.0 Titanium Dioxide Pigment 120, 0 120, 0

Silicate filler 80, 0 80, 0

Talc 40, 0 40, 0

Calcium carbonate 215, 0 215, 0

Mattifying filler 12, 0 12, 0

Caustic soda, 10% 1.0 1.0

Film-forming aids 10, 0 10, 0

E. Aqueous silicone resin preparation 83, 0 0 according to Example 1

N. E. aqueous 0 83, 0

Silicone resin preparation according to

example 1

Styrene acrylate dispersion, 50% in 95, 0 95, 0 water with a styrene too

Butyl acrylate ratio, so that

a minimum film-forming temperature of

Polymers of 15 ° C is obtained

Total: 990 990

The formulation results in an inventive and a non-inventive porous coating, since their

Pigment Volume Concentration (PVK) is above the critical PVK.

Example 3: Performance Tests of

and not according to the invention

Construction coating from example 2: Examination of the building coatings from examples 2 on their

Performance characteristics, according to the standard regulations listed in Table 3:

Table 3

Procedure for determining surface hydrophobicity:

A drop of water (volume 1 ml) is placed on the surface to be tested from a pipette. After 10 minutes, it is visually assessed how well the drop wets the surface.

Rating System :

1 = substrate is not wetted, water drops from a sloping surface (inclination 30 ° to the plane) completely and without residue.

2 = good beading effect but small droplets of water remain hanging on the surface

3 = substrate is partially wetted, water droplets will only bead off incompletely

4 = substrate is wetted, the water droplet no longer pearls

5 = substrate is wetted, the water droplet spreads

The results obtained are shown in Table 4. Table 4

When using the aqueous silicone resin dispersion according to the invention, it is observed that even without conditioning a very low water permeability rate is achieved. This remains after conditioning. The abrasion resistance of the paint, the inventive aqueous

Contains silicone resin dispersion is already easier

Conditioning at the highest level that defines the specified standard. This level is maintained after weathering. The most eye-catching effect that the aqueous silicone resin dispersion according to the invention produces is the surprising and novel combination of low water permeability and

simultaneously low surface hydrophobicity. Because the

Color formulations of the same components in the same proportions, this effect can only be explained by the different behavior of the invention and the non-inventive silicone resin dispersion.

Example 4 Preparation of an Inventive and a Non-Inventive Aqueous Silicone Resin Dispersion

From the components tabulated below, a silicone resin dispersion according to the invention analogously to the non-inventive prior art description in EP1583790 Bl made. The quantities used are in

Table 5 indicated.

Table 5

Components Chemical Identity / E.N.E.

Manufacturer

Arlypone IT 16 Polyoxyethylene (16) 6.0 g 6.0 g

(80% isotridecyl ether

aqueous (nonionic

Solution) Emulsifier, manufacturer

Cognis GmbH,

Illertissen)

Water 3.5 + 38.24 3.5 + 38, 24 g g

E. Silicone resin silicone resin from 95 52.0 g 0.0 g

mol% MeSi0 _3/2 -

Units and 5 mol%

PhSi0 _3/2 units,

17 mol% EtO-

Residues and 1.6 mol%

HO residues statistically

on these T units

distributed

N.E. 1. silicone resin 1, the 0, 0g 52.0 g

silicone resin

from 90 mol% MeSi0 _3/2 -

Units (= T-

Units) and 10

mol% Me ₂ Si0 _2/2 -

Units exists,

with 8 mol% EtO-

Residues and 2 mol%

silicon-bonded HO-

Leftovers on the T and

Distributed D units

are, from which the

Meaning of R ⁷

results and 2. Silicone resin 2, the

100% MeSi0 _3/2 -

Units (= T-

Units),

with 20 mol% EtO-

Remains statistically

the T units of

Silicone resin 2

are distributed, where

of silicone resin 1 80

Weight percent and

of silicone resin 2 20

Weight percent in

present to the mixture

are and

3. calculated on the

Mass silicone resin 1

10% by weight

Triethoxyisooctlysila

n,

where the siloxane

Silane preparation in

Water dispersed

is and her share in

100% of the dispersion

50 weight percent

is

Preservative 10% solution of 2- 0.1 g 0.1 g

WITH 10

Methyl - isothiazolin-3-one in

water

(Preservative

, Manufacturer Fa. Rohm and Haas)

PREVENTOLTBIT 10 10% alkaline 0.1 g 0.1 g

Solution of 1,2-benzisothiazolin-3-one

(Preservative

, Manufacturer LANXESS)

Triethanolamine triethanolamine 0.06 g 0.06 g

Example 5: Inventive and not inventive

Building coating using the aqueous silicone resin dispersions according to the invention and not according to the invention according to Example 4:

The following components were prepared by mixing with a fast-rotating commercially available rotor stator mixing device to an inventive and not inventive

Building protection coating (aqueous paint) mixed. The amounts used are given in Table 6.

Table 6

Component E.N.E.

Quantity [g] Quantity [g]

Water 353, 9 353, 9

Pot preserver 2,0 2, 0

Film Conservator 10,0 10, 0

Cellulose thickener 3, 0 3.0

PU thickener 2.0 2, 0

Polyphosphate, sodium salt 2, 0 2.0

Polyacrylate, sodium salt 2, 0 2.0

Silicone Antifoam 4.0 4.0

Titanium Dioxide Pigment 117, 0 117, 0

Silicate filler 78, 0 78, 0 Talc 39, 0 39.0

Calcium carbonate 209.5 209.5

Mattifying filler 11, 5 11, 5

Sodium hydroxide solution, 10% 1.1 1.1 according to the invention aqueous 40.0 0.0 silicone resin preparation according to

Example 4

Non-inventive aqueous 0.0 40.0 silicone resin dispersion according to Example

4

Vinyl acetate ethylene copolymer 125, 0 125, 0 dispersion, 60% in water

Total: 1000 1000

Pigment Volume Concentration (PVK) is above the critical PVK.

Example 6: Performance Tests of

and not according to the invention

Construction coating from example 5:

The examination of the building coatings of Examples 5 on their performance characteristics is analogous to Example 3

The results obtained are shown in Table 7. Table 7

When using the aqueous silicone resin dispersion according to the invention, it is observed that even without conditioning a significantly lower water permeability rate is achieved than in the case of the comparable noninventive invention

Architectural coating. This remains after conditioning

receive. The abrasion resistance of the paint, which the

Contains aqueous silicone resin according to the invention, is already after simple conditioning at the highest level, which defines the specified standard. This level is maintained after weathering. The most obvious effect produced by the aqueous silicone resin dispersion of the invention is the surprising and novel combination of lower

Water permeability and at the same time lower

Surface hydrophobicity. Since the color formulations consist of the same components in the same proportions, this effect can only be explained by the different behavior of the silicone resin dispersion according to the invention and of the noninventive silicone resin dispersion.

Claims

claims

1. Aqueous silicone resin dispersion containing

(A) 10 - 70 wt.% Of at least one at room temperature (25 ° liquid silicone resin

from at least 50% repeat units of the formula

R ¹ (R ² 0) _b SiO ₍₃ _{b / 2)} (1) where

R ¹ Cl - C20 is hydrocarbon radicals which bear no or at least one heteroatom, R ^{2 is} C ¹ -C 6 hydrocarbon radicals or a hydrogen radical, and

b is 0, 1 or 2, and 0 to at most 50% repeating units of the formula

(2)

- ⁸ ' ^{~ 7} - SiO (4-Cd / 2) (2), where

R ⁸ independently of one another Cl - C20

Hydrocarbon radicals mean

R ^{2 has} the meaning given above,

c can be 0, 2 or 3,

d can be 0, 1, 2 or 3,

with the proviso that c + d ^ 3, characterized in that

the silicone resins at least 2 from each other

contain different repeat units of the formula (1) in the ratio of 1: 100 to 100: 1, which carry at least 2 mutually different radicals R ¹ , which are to distinguish at least one hydrocarbon compound from each other in their length or size,

in at least 5% of all repeat units of the formula (1) b = 0,

in at least 5% of all repeat units of the formula (1) b = 1,

in at most 25% of all repeat units of the formula (1) b = 2,

B) 0-2% by weight of at least one organopolysiloxane containing SiC-bonded radicals with basic nitrogen, with the proviso that its amine number is at least 0.01, (C) 0.1-30 wt .-% of at least one dispersing aid .

(D) 10 to 70% by weight of water,

(E) 0.01-10% by weight of at least one adjuvant, and

2. Aqueous silicone resin dispersion according to claim 1, characterized in that R ^{1 is} selected from C ¹ -C 20 -alkyl radicals without heteroatoms and aryl radicals.

3. Aqueous silicone resin dispersion according to claim 1 or 2, characterized in that R ^{1 is} selected from C ¹ -C 20 -alkyl radicals without heteroatoms.

4. Aqueous silicone resin dispersion according to claim 1 to 3, characterized in that R ^{1 is} selected from methyl, ethyl, n-octyl and iso-octyl radicals.

5. Aqueous silicone resin dispersion according to claims 1 to 4, characterized in that R ^{1 is} methyl and iso-octyl radicals.

6. Aqueous silicone resin dispersion according to claim 1 or 2, characterized in that R ¹ is selected such that a combination of at least one C ¹ -C 20 -alkyl radical without

Heteroatoms takes place with at least one aryl radical.

7. Aqueous silicone resin dispersion according to claim 1 or 2, characterized in that R ^{1 is} methyl and phenyl radicals.

8th . Aqueous paints, characterized in that at least one inventive silicone resin dispersion according to claim 1 to 7 is admixed.

9. Aqueous paints according to claim 8, characterized

characterized in that it is paints, varnishes, paints and plasters.