Composition for forming a draining floor covering and method for producing such coverings

Abstract

------ Composition for forming a draining floor covering and method for producing such coverings Composition curable by atmospheric humidity for producing a draining floor covering, characterized in that it comprises 15 to 65 parts by weight of at least one polyether with silane terminations, having a number-average molecular mass of 4000 to 30000 g / mol; 85 to 35 parts by weight of at least one polysiloxane having a number-average molecular mass of 700 to 2500 g / mol; 1 to 8 parts by weight of at least one aminosilane co-crosslinker, the quantity of (A)+(B) representing 100 parts by weight and the quantity of (C) being given per 100 parts by weight of (A)+(B).

Description

Title of the invention: Composition for forming a draining floor covering and method for producing such coverings

[0001] The present invention relates to a composition for forming a draining floor covering and also to a method for producing such a covering.

[0002] The compositions known for this application are currently two-component compositions, namely polyurethanes and their isocyanate hardener. As isocyanates, mention may be made of aromatic diisocyanates, such as toluene diisocyanate and methylene diphenyl diisocyanate, as well as aliphatic isocyanates such as hexamethylene dimethyl isocyanate.

[0003] The disadvantages of this technology are: • the use of a two-component system which requires mixing the polyurethane and the isocyanate hardener at the time of use given the very short pot life of the mixture; - the high toxicity of isocyanates which are allergenic; - the formation of CO2 in high atmospheric humidity in the coating film with the formation of bubbles and white traces.

[0004] The applicant company therefore sought a solution for producing draining coatings without the difficulties which have just been mentioned.

[0005] For this purpose, she discovered a drainage system that dries with humidity with a single component.

[0006] The present invention therefore firstly relates to a composition which can be hardened by atmospheric humidity for producing a draining floor covering, characterized in that it comprises: A. 15 to 65 parts by weight, preferably 25 to 60 parts by weight, of at least one silane-terminated polyether having a weight-average molecular weight of 4000 to 30000 g / mol; B. 85 to 35 parts by weight, preferably 75 to 40 parts by weight, of at least one polysiloxane having a weight average molecular weight of 700 to 2500 g / mol; C. 1 to 8 parts by weight, preferably 2 to 6 parts by weight, of at least one aminosilane co-crosslinker,

[0007] the quantity of (A)+(B) representing 100 parts by weight and the quantity of (C) being given per 100 parts by weight of (A)+(B).

[0008] The composition according to the present invention is advantageously without isocyanates.

[0009] The polyether(s) (A) may be chosen from those of formulae (2) to (4): li II II II 0 0 0 o (2) Z?—R'6—N—C—NH—R'8—[NH—G—[OR'7]n2—0—C—NK—R?8]m^ NH—C—N—R'6—Z2 I II 11 II II L R'9 0 0 0 0 R'9 (3) 2?—R1°—[ÛR''7]n3—R10—Z3 (4)

[0010] in which: Z1, Z2, Z3 each represent -SiR3pn(OR12)p, with p = 0, 1 or 2 in particular 0 or 1; and R11 and R12, identical or different, each being a linear or branched C1-C6 alkyl radical; R6, R'6 each represent a divalent alkylene radical, linear or branched, CrC6; R7, R'7 each represent a divalent alkylene radical, linear or branched, in R8, R'8 each represent a C5-Ci5 hydrocarbon radical, aromatic or aliphatic, linear, branched or cyclic; R9, R'9 each represent hydrogen, phenyl, linear, branched or cyclic C1-C6 alkyl or 2-succinate radical of formula R13—0(0)Ç—CH2—CH—C(0)0—R2 ' R13 being an alkyl radical' linear or branched, in C1-C6; • nb n2, n3 are non-null integers; • mi is zero or a non-zero integer; • m2 is a non-zero integer; • ni and mb n2 and m2, and n3 are such that the weight average molecular mass of the polyether of formula respectively (2), (3) and (4) is 4000 to 30000 g / mol.

[0011] The polyether (A) can advantageously be that of the formula: (R12O )3-p( R11P)SI—R6—NH—C—[OR7]ni —O—C—NH—R6—Si ( R11 )p( O R12)3-p OO

[0012] (2a)

[0013] in which R6, R7, R11, R12, ni and p are as defined above, in particular R11 and R12 represent methyl, p is equal to 1, and R6 is methylene or ethylene or propylene.

[0014] The polyether(s) (A) have in particular a viscosity at 25°C of 400 to 20000 mPa.s on the Elcometer 2300 RV viscometer.

[0015] The polysiloxane(s) (B) may be chosen from those having CsHs units and / or CHa units and / or units —O—Si—O— — O—Si—0— O CHa I CH3 —O—If—O— I O I

[0016] The polysiloxane is advantageously a condensation polysiloxane of C6H5 -Si-(OCH3)3 and CH3-Si-(OCH3)3 or a condensation polysiloxane of C6H5 -Si-(OCH3)3.

[0017] The polysiloxane(s) (B) may have a viscosity at 25°C of 70 to 500 mPa.s on the Elcometer 2300 RV viscometer.

[0018] The co-crosslinker or co-crosslinkers may be chosen from silanes of formula (1):

[0019] (R1)(R2)N-R3-SiR43q(OR5)q(l)

[0020] in which: • R1 and R2 each represent hydrogen, linear C1-C6, branched C2-C8 or cyclic C6-C18 alkyl; amino-C1-C12 alkyl; • R3 represents CrCi8 alkylene; • R4 and R5, identical or different, are each a linear or branched C1-C6 alkyl radical; • q is 0, 1 or 2, being in particular 0 or 1, and

[0021] in particular among:

[0022] aminopropyltrimethoxy silane,

[0023] 1 'aminopropy Itriethoxy silane,

[0024] aminopropylmethyl-dimethoxy silane, aminopropylmethyldiethoxy silane,

[0025] N-(2-aminoethyl) aminopropyltrimethoxysilane,

[0026] N-(2-aminoethyl)aminopropyltriethoxysilane,

[0027] N-(2-aminoethyl)aminopropyltrimethyldimethoxysilane,

[0028] cyclohexylaminomethyltriethoxysilane,

[0029] cyclohexylaminomethylethoxysilane,

[0030] N-cyclohexylaminomethyltrimethoxysilane and

[0031] N-cyclohexylaminomethylmethyldimethoxysilane.

[0032] The composition according to the present invention may further comprise at least one reactive diluent chosen from dodecyltrimethoxysilane, octadecyltrimethoxy silane, n-octyltriethoxysilane, methyltrimethoxysilane, methyltriethoxysilane, n-propyltriethoxysilane, n-propyltrimethoxysilane, n-octyltrimethoxysilane, di-methyldimethoxysilane, dimethyldiethoxysilane, hexadecyltrimethoxysilane, tri-methylethoxysilane, (cyclohexyl)methyldimethoxysilane, dicyclopentyldimethoxysilane, dodecylmethyldiethoxysilane, n-dodecyltriethoxysilane, octadecyl-triethoxysilane, n-hexadecyltriethoxysilane, tetraethoxysilane, 1,2 bis(triethoxysilyl)ethane, 1,2 bis(trimethoxysilyl)ethane, methylpropyldiethoxysilane, methylpropyldimethoxysilane, isooctyltriethoxy silane, octylmethyldimethoxy silane, octylmethyldiethoxysilane, n-octadecylmethyldimethoxysilane and n-octadecylmethyldiethoxysilane,

[0033] in an amount in particular of 1 to 25 parts by weight, preferably of 5 to 20 parts by weight, in particular of 10 to 15 parts by weight, per 100 parts by weight of (A) + (B).

[0034] The composition according to the present invention may also further comprise at least one of: - adhesion promoters in an amount in particular of 1 to 8 parts by weight, preferably of 2 to 6 parts by weight, in particular of 3 to 5 parts by weight; - water traps chosen in particular from vinyl-functional alkoxysilanes, in particular in an amount of 1 to 8 parts by weight, in particular 2 to 6 parts by weight, more particularly 3 to 5 parts by weight, • UV stabilizers chosen in particular from hindered amines, benzotriazole, benzophenone and hydroxytriazine, in particular in an amount of 0.1 to 4 parts by weight, in particular 0.1 to 2 parts by weight: • antioxidants chosen in particular from sterically hindered phenolic derivatives, in particular in an amount of 0.1 to 1 part by weight, in particular 0.1 to 0.5 part by weight; • rheology modifiers chosen in particular from polyolefins, silica, pyrogenic silicic acids, precipitated silicic acids, cellulose ethers, castor oil derivatives, polyamides, fatty acid amide waxes and clays, in particular in an amount of 0.1 to 5 parts by weight, in particular 0.1 to 3 parts by weight; • crosslinking accelerators chosen in particular from organic amines, in particular in an amount of 0.1 to 1 part by weight, in particular 0.1 to 0.5 parts by weight;

[0035] all parts by weight being given per 100 parts by weight of (A) + (B).

[0036] Examples of adhesion promoters include 3-glycidoxypropyl trimethoxysilane, 3-glycidoxypropyl methyldimethoxisilane, 3-glycidoxypropyltriethoxysilane, 3-glycidoxypropyl methyl diethoxysilane, 2-(3,4-epoxycyclohexyl) ethyl trimethoxysilane, 2-(3,4-epoxycyclohexyl) ethyltriethoxysilane, 2-(3,4-epoxycyclohexyl) ethyl methyldimethoxysilane,

[0037] 2-(3,4-epoxycyclohexyl) ethyl methyldiethoxysilane and epoxy silane polymer

[0038] Examples of water traps include vinyl triethoxysilane, dichloromethyl vinyl silane,

[0039] dimethoxy methylvinyl silane, diethoxymethyl vinylsilane, vinyl triacetoxy silane, chlorodimethylvinyl silane, vinyltrichlorosilane, vinyl tris(2-methoxy ethoxy)silane, l,3,5,7-tetravinyl-l,3,5,7-tetramethylcyclotetrasiloxane, oligomeric vinylsilane, vinyltri(isopropoxy)silane and vinyltriacetoxysilane.

[0040] Examples of curing accelerators include triethylamine, tributylamine, trioctylamine, monoethanolamine, diethanolamine, triethanolamine, triisopropanol amine, tetramethylenediamine, quadrol, diethylenetriamine, dimethylaniline, proton sponge, N,N'-bis[2-(bis dimethylamino)ethyl]-N,N'-dimethylethylenediamine, N,N'-dimethylcyclohexylamine, N-dimethylphenylamine, 2-methylpentamethylenediamine, 1,1,3,3-tetramethylguanidine, 1,3-diphenylguanidinebenzamidine, N-ethylmorpholine, 2,4,6-tris(dimethylaminomethyl)phenol (TDM), l,8-diazabicyclo[5.4.0]undec-7-ene (DBU), l,5-diazabicylo(4,3.0)non-5-ene (DBN, n-pentylamine, n-hexylamine, di-n-propylamine, ethylenediamine,

[0041] diazabicyclo[2.2.2]octane (DABCO), 4-dimethylaminopyridine (DMAP), penta-methyldiethylenetriamine (PMDETA, imidazole, 1-methylimidazole.

[0042] The composition according to the present invention can advantageously have a viscosity at 25°C of 650 to 3000 mPa.s on the Elcometer 2300 RV viscometer.

[0043] The composition according to the present invention can advantageously have a Shore D hardness according to the ISO 868:2003 standard of 25 to 85.

[0044] The present invention also relates to a method for producing a draining coating on a surface of the bitumen, concrete, compacted aggregate mix or dirt track type, characterized in that it comprises the steps consisting of: • mix a composition as defined above with at least one aggregate having a grain size of 1 to 10 mm, at a rate of 3 to 8 kg of composition per 100 kg of aggregate; • spread the mixture thus obtained of the grains of the aggregate(s) coated with com- position at a height of 8 to 30 mm; and • let the layer thus formed harden.

[0045] The aggregate(s) may be chosen from quartz, marble and granite.

[0046] The method according to the present invention may also comprise the application of a primer film on the surface to be coated before the application of said composition.

[0047] The three tables below provide indications intended to guide the applicator of a draining coating according to the invention. Coating thickness Aggregate 2.5-5 mm Aggregate mix 1-3 mm and 2.5-5 mm (50 / 50) 16 mm 22 liter s / m2 / second 9 liter s / m2 / second 20 mm 26 liter s / m2 / second 12 liters / m2 / second Aggregate granulometry Quantity of resin per 100 kg of aggregates 1-3 mm 6-8 kg per 100 kg of aggregates 2.5-5 mm 4-6 kg per 100 kg of aggregates 5-8 mm 3-5 kg ​​per 100 kg of aggregates

[0048] These quantities can be reduced or increased depending on the porosity of the aggregates. Terrace on concrete slab with a slope of 1.5-2% 8 - 10 mm Pedestrian path 10-18 mm Traffic lane 18-24 mm

[0049] The following Examples 1 to 4 illustrate the present invention without, however, limiting its scope. In these examples, the constituents denoted GENIOSIL® and SILRES® are marketed by the company WACKER CHEMIE AG under the respective names indicated. General preparation procedure Liquid compositions having the formulations indicated in the following Table 1 were prepared, the quantities of the constituents being given in parts by weight.

[0051] [Tables 1] Example 1 2 3 4 GENIOSIL® E-10 (a) 34 40 43.90 60.40 SILRES® IC 368 (b) 66 56.10 39.60 SILRES® IC 678 (c) 60 GENIOSIL® DAPDM (d) 5 5 5 5 SILRES® 1701 SQ (e) 12 12 12 12 GENIOSIL® T (f) 2 2 2 2 Viscosity at 25°C using the Elcometer 2300 RV viscometer (mPa.s) 850 850 1000 1250 Shore D hardness according to ISO 868: 2003 65 55 45 35 a. polyether of formula (2) above with ml=0, p=2, R11, R12 = methyl, R6 = methylene, and a weight average molecular weight of about 8900 g / mol. b. Condensation polysiloxane of C6H5-Si-(OCH3)3 and CH3-Si-(OCH3)3 in a weight ratio of 62:38, which comprises 14-15% by weight of methoxy groups, its weight average molecular weight being 1900 g / mol. c. Condensation polysiloxane of C6H5-Si-(OCH3)3, which comprises 14-15 wt% of methoxy groups, its weight average molecular weight being 900 g / mol. d. Co-crosslinker N-(2-aminoethyl)aminopropylmethyl-dimethoxysilane e. Reactive diluent mixture of octyltriethoxysilane isomers, isooctyltriethoxysilane being the main component f. UV stabilizer General operating procedure for application

[0052] We wanted to cover a 30m2 concrete slab with a slope of 1.5% with a draining coating formed from each of the above formulations.

[0053] It was checked that the slab had been poured for more than 28 days and that it was dry.

[0054] First, a primer consisting of the liquid composition that will be used for the liquid composition / aggregate mixture was applied, at a rate of 150 to 200g / m2.

[0055] After 30 min to 1 h at 20°C, the following was mixed: • 50 kg of aggregate with a grain size of 2.5-5 mm of Flannel Grey marble marketed by the OMYA Company in 25 kg bags; and • 3 kg of each of the liquid compositions prepared as above,

[0056] the granulate and the liquid composition having been introduced into a vertical mixer of the BARON® brand to be mixed there for between 2 and 3 minutes.

[0057] The liquid composition / aggregate mixture was poured into a wheelbarrow, then applied to the slab using a rake and then smoothed using a manual “Flemish” type or mechanical “helicopter” type smoother, which, to make working easier, was regularly lubricated with acetone solvent.

[0058] This operation was repeated several times in order to cover the entire slab.

[0059] The total consumption was, for a smoothed draining coating thickness of 8 mm,: • 6 kg of primer • 400 kg of aggregate and • 24 kg of liquid composition.

[0060] The surface was dry after 6 hours and walkable after 24 hours at 20°C and passable for a light vehicle after 48 hours at 20°C.

Claims

Claims

1. - Composition curable by atmospheric air humidity for the production of a draining floor covering, characterized by the fact that it includes: A. 15 to 65 parts by weight, preferably 25 to 60 parts by weight, of at least one silane-terminated polyether having a weight-average molecular weight of 4000 to 30000 g / mol; B. 85 to 35 parts by weight, preferably 75 to 40 parts by weight, of at least one polysiloxane having a weight average molecular weight of 700 to 2500 g / mol; C. 1 to 8 parts by weight, preferably 2 to 6 parts by weight, of at least one aminosilane co-crosslinker, the quantity of (A)+(B) representing 100 parts by weight and the quantity of (C) being given per 100 parts by weight of (A)+(B).

2. - Composition according to claim 1, characterized in that the or the polyethers (A) are chosen from those of formulas (2) to (4): Z>--R6--NH—CH0R7]ni—[O—C—NH—R8--NH—CHÜR7]niim^ II II II ' It 0 OOO (2) Tî—p'e—N—Q—NH^R'8—[NH—C—î0R'7]n2—0—C—NH—R^Jma-NU—C—N—R'8—Z2' I II II “Il II I RI9 OO 0 0 R'9 (3) Z3—R10—-[OR,,7]n3—-F'10—Z3 W in which: • Z1, Z2, Z3 each represent -SiR3pn(OR12)p, with p=0, 1 or 2, in particular 0 or 1; and R11 and R12, identical or different, each being a linear or branched C1-C6 alkyl radical; • R6, R'6 each represent a divalent alkylene radical, linear or branched, in C1-C6; • R7, R'7 each represent a divalent alkylene radical, linear or branched, in C2-C4; • R8, R'8 each represent a C5-C15 hydrocarbon radical, aromatic or aliphatic, linear, branched or cyclic; • R9, R'9 each represent hydrogen, phenyl, linear, branched or cyclic C1-C6 alkyl or 2-succinate radical of formula R13_q(OjC_CH2_GH_C(OyO—' R° being I a linear or branched C1-C6 alkyl radical; • nb n2, n3 are non-zero integers; • mi is zero or a non-zero integer; • m2 is a non-zero integer; • ni and mb n2 and m2, and n3 are such that the weight-average molecular mass of the polyether of formula (2), (3) and (4) respectively is 4000 to 30000 g / mol.

3. - Composition according to claim 2, characterized in that the polyether (A) is that of the formula: O 0 (2a) in which R6, R7, R11, R12, ni and p are as defined in claim 2, in particular R11 and R12 represent methyl, p is equal to 1, and R6 is methylene or ethylene or propylene.

4. - Composition according to one of claims 1 to 3, characterized in that the polyether(s) (A) have a viscosity at 25°C of 400 to 20000 mPa.s on the Elcometer 2300 RV viscometer.

5. - Composition according to one of claims 1 to 4, characterized in that the polysiloxane(s) (B) is or are chosen from those having CeHs units and / or CHs units and / or —0—Si—0— —0—Si—0— '1 î 0 CHs 1 CH|3 —O—Si—0— 1 O units

6. - Composition according to one of claims 1 to 5, characterized in that the polysiloxane is a condensation polysiloxane of C6H5-Si-(OCH3)3 and CH3-Si-(OCH3)3 or a condensation polysiloxane of C6H5-Si-(OCH3)3.

7. - Composition according to one of claims 1 to 6, characterized in that the polysiloxane(s) (B) have a viscosity at 25°C of 70 to 500 mPa.s on the Elcometer 2300 RV viscometer.

8. - Composition according to one of claims 1 to 7, characterized in that the co-crosslinker or co-crosslinkers is or are chosen from silanes of formula (1): (R1)(R2)N-R3-SiR43 q(OR5)q( 1 ) in which: • R1 and R2 each represent hydrogen, linear C1-C6 alkyl, branched C2-C8 or cyclic C6-C18 alkyl; amino-C1-C12 alkyl; • R3 represents C1-C18 alkylene; • R4 and R5, identical or different, are each a linear or branched C1-C6 alkyl radical;• q is 0, 1 or 2, being in particular 0 or 1, and in particular among: aminopropyltrimethoxysilane, aminopropyltriethoxy silane, aminopropylmethyl-dimethoxy silane, aminopropylmethyldiethoxysilane, N-(2-aminoethyl)aminopropyl-trimethoxysilane, N-(2-aminoethyl)aminopropyltriethoxysilane, N-(2-aminoethyl)aminopropyltrimethyldimethoxysilane, cyclohexylamino-nomethyltriethoxysilane, cyclohexylaminomethylethoxysilane, N-cyclohexylaminomethyltrimethoxysilane and N-cyclohexylaminomethylmethyldimethoxysilane.;

9. - Composition according to one of claims 1 to 8, characterized in that it further comprises at least one reactive diluent chosen from: dodecyltrimethoxysilane, octadecyltrimethoxysilane, n-octyltriethoxysilane, methyltrimethoxysilane, methyltriethoxysilane, n-propyltriethoxysilane, n-propyltrimethoxysilane, n-octyltrimethoxysilane, dimethyldimethoxysilane, dimethyldiethoxysilane, hexadecyltrimethoxysilane, trimethylethoxysilane, (cyclohexyl)methyldimethoxysilane, dicyclopentyldimethoxysilane, dodecylmethyldiethoxysilane, n-dodecyltriethoxysilane, octadecyl- triethoxysilane, n-hexadecyltriethoxysilane, tetraethoxysilane, 1,2 bis(triethoxysilyl)ethane, 1,2 bis(trimethoxysilyl)ethane, methyl-propyldiethoxysilane, methylpropyldimethoxysilane, risooctyltriethoxysilane, roctylmethyldimethoxysilane, roctylmethyldiethoxysilane, n-octadecylmethyldimethoxysilane and n-octadecylmethyldiethoxysilane, in particular in an amount of 1 to 25 parts by weight, preferably 5 to 20 parts by weight, in particular 10 to 15 parts by weight, per 100 parts by weight of (A) + (B).

10. Composition according to one of claims 1 to 9, characterized in that it further comprises at least one of: - adhesion promoters in an amount in particular of 1 to 8 parts by weight, preferably of 2 to 6 parts by weight, in particular of 3 to 5 parts by weight; - water traps chosen in particular from vinyl-functional alkoxysilanes, in particular in an amount of 1 to 8 parts by weight, in particular 2 to 6 parts by weight, more particularly 3 to 5 parts by weight • UV stabilizers chosen in particular from hindered amines, benzotriazole, benzophenone and hydroxytriazine, in particular in an amount of 0.1 to 4 parts by weight, in particular 0.1 to 2 parts by weight: • antioxidants chosen in particular from sterically hindered phenolic derivatives, in particular in an amount of 0.1 to 1 part by weight, in particular 0.1 to 0.5 part by weight; • rheology modifiers chosen in particular from polyolefins, silica, pyrogenic silicic acids, precipitated silicic acids, cellulose ethers, castor oil derivatives, polyamides, fatty acid amide waxes and clays, in particular in an amount of 0.1 to 5 parts by weight, in particular 0.1 to 3 parts by weight; • crosslinking accelerators chosen in particular from organic amines, in particular in an amount of 0.1 to 1 part by weight, in particular 0.1 to 0.5 part by weight; all parts by weight being given per 100 parts by weight of (A) + (B).

11. Composition according to one of claims 1 to 10, characterized in that it has a viscosity at 25°C of 850 to 2000 mPa.s on the Elcometer 2300 RV viscosimeter.

12. - Composition according to one of claims 1 to 11, characterized in that it has a Shore D hardness according to standard ISO 868: 2003 of 25 to 85.

13. - Method for producing a draining coating on a surface of the bitumen, concrete, compacted aggregate mix or dirt track type, characterized in that it comprises the steps consisting of: • mixing a composition as defined in one of claims 1 to 12 with at least one aggregate having a grain size of 1 to 10 mm, at a rate of 3 to 8 kg of composition per 100 kg of aggregate; • spreading the mixture thus obtained of the grains of the aggregate(s) coated with composition over a height of 8 to 30 mm; and • allowing the layer thus formed to harden.

14. - Method according to claim 13, characterized in that the aggregate(s) is / are chosen from quartz, marble and granite.

15. - Method according to one of claims 13 and 14, characterized in that it comprises the application of a primer film on the surface to be coated before the application of said composition.

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