AQUEOUS DIPPING COMPOSITION

Abstract

The present invention relates to an aqueous dipping composition for coating a textile reinforcing material, comprising at least one rubber latex, at least one blocked isocyanate, at least one filler, at least one epoxy group-containing compound, and at least one polymer with carboxylic acid functional groups. The present invention further relates to the use of such a composition, to a process for coating a textile reinforcing material with this composition, to a coated textile reinforcing material and a respective elastomeric article comprising the coated textile reinforcing material.

Claims

1. An aqueous dipping composition for coating a textile reinforcing material, comprising 4.5% to 25% by dry weight of at least one rubber latex, 0.2% to 4.5% by dry weight of at least one blocked isocyanate, 0.3% to 15% by dry weight of at least one filler, 0% to 4% by dry weight of at least one epoxy group-containing compound, and 0% to 2% by dry weight of at least one polymer with carboxylic acid functional groups, wherein the amounts in % by dry weight are based on the total weight of the aqueous dipping composition, wherein the weight ratio of rubber latex to the sum of blocked isocyanate, epoxy group-containing compound and polymer with carboxylic acid functional groups is at least 2, and wherein the composition is essentially free of resorcinol, resorcinol precondensates, formaldehyde and formaldehyde-releasing substances.

2. The dipping composition according to claim 1, wherein the at least one rubber latex is selected from the group consisting of natural rubber latex, styrene-butadiene rubber latex, ethylene-propylene-diene rubber latex, butyl rubber latex, styrene-butadiene-vinylpyridine rubber latex, nitrile butadiene rubber latex, chloroprene rubber latex, isoprene rubber latex, butadiene rubber latex, functionalized rubber latex and combinations thereof.

3. The dipping composition according to claim 1, wherein the at least one blocked isocyanate comprises units selected from the group consisting of tetramethylene diisocyanate, hexamethylene diisocyanate, diphenylmethane 4,4′-diisocyanate, octamethylene diisocyanate, decamethylene diisocyanate, dodecamethylene diisocyanate, aromatic diisocyanates comprising toluene 2,4- or 2,6-diisocyanate, tetramethylxylylene diisocyanate, p-xylene diisocyanate, 2,4′- or 4,4′-diisocyanatodiphenylmethane, phenyl 1,3- or 1,4-diisocyanate, and combinations thereof.

4. The dipping composition according to claim 1, wherein the at least one filler is selected from the group consisting of silica, silicate, carbon black, graphite, graphene, fullerenes, carbon nanotubes, alkaline earth carbonates, alkaline earth oxides, zinc oxide, titanium dioxide, aluminum oxide, alkaline earth hydroxides, aluminum hydroxide and combinations thereof.

5. The dipping composition according to claim 1, comprising 4.5% to 25% by dry weight of the at least one rubber latex, 0.2% to 4.5% by dry weight of the at least one blocked isocyanate, 0.3% to 15% by dry weight of the at least one filler, 0.2% to 4% by dry weight of the at least one epoxy group-containing compound selected from the group consisting of glycidyl-based glycerol, sorbitol-based epoxy compounds, phenol-based novolak epoxy compounds, cresol-based novolak epoxy compounds and combinations thereof, and 0.1% to 2% by dry weight of the at least one polymer with carboxylic acid functional groups based on monomers selected from acrylic acid, methacrylic acid, esters of acrylic acid, esters of methacrylic acid, itaconic acid, crotonic acid, cinnamic acid, maleic acid and combinations thereof, wherein the amounts in % by dry weight are based on the total weight of the aqueous dipping composition.

6. The dipping composition according to claim 1 which contains no epoxy group-containing compound.

7. The dipping composition according to claim 1, further comprising a base, preferably selected from the group consisting of ammonium hydroxide, sodium hydroxide and combinations thereof.

8. The dipping composition according to claim 1, further comprising an additive selected from the group consisting of waxes, colorants, catalysts of isocyanate deblocking or trimerization reactions, catalysts of reactions between isocyanate and an epoxy group-containing and/or hydroxyl group-containing compound or a polymer with carboxylic acid functional groups, catalysts of reactions between a polymer with carboxylic acid functional groups and an epoxy group-containing and/or hydroxyl group-containing compound, and combinations thereof.

9. The dipping composition according to claim 1, having a solid content of 5 to 30% by dry weight, preferably 7 to 27% by dry weight.

10. The dipping composition according to claim 1, wherein the weight ratio of rubber latex to the sum of blocked isocyanate, epoxy-group containing compound and polymer with carboxylic acid functional groups is at least 3.

11. Use of the aqueous dipping composition according to claim 1 for coating a textile reinforcing material, preferably selected from the group consisting of polyesters, polyamides, polyurethanes, glass, carbon, celluloses, polycarbonates, polyketones and combinations thereof.

12. A process for coating a textile reinforcing material, comprising the steps of treating a textile reinforcing material with the dipping composition according to claim 1, preferably by dipping; and heat-treating the composition, preferably at a temperature in the range of from 60 to 260° C.

13. A coated textile reinforcing material obtained from the process according to claim 12.

14. An elastomeric article comprising (i) at least one elastomeric compound and (ii) the coated textile reinforcing material according to claim 13.

15. The elastomeric article according to claim 14 which comprises a rubber article.

16. The elastomeric article according to claim 15 in which the rubber article is selected from the group consisting of a tire, a belt, a conveyor belt, a transmission belt, a drive belt, a hose, a strip belt, a transport belt, and an air bellow.

17. An elastomeric article comprising (i) at least one elastomeric compound and (ii) a textile reinforcing material that is coated with a heat-treated dipping composition according to claim 1.

18. The elastomeric article according to claim 17 which comprises a rubber article.

19. The elastomeric article according to claim 18 in which the rubber article is selected from the group consisting of a tire, a belt, a conveyor belt, a transmission belt, a drive belt, a hose, a strip belt, a transport belt, and an air bellow.

Description

EXAMPLES

Examples 1 to 12

[0059] Cords made from polyester (polyethylene terephthalate (PET), 2-plied, 1440 dtex, 375x375 twisted, non adhesive activated) were pretreated by dipping the cord into a pre-dip composition containing 95.26% by weight of water, 0.90% by weight of Denacol EX313 (an epoxy compound) and 3.84% by weight of Grilbond IL-6 (a polyisocyanate compound) and heat-treated at a temperature between 210 and 250° C. After treatment with the pre-dip composition, the cords were dipped with the aqueous dipping composition according to Example 1 (reference example) and Examples 2 to 12 (according to the present invention), respectively. The dipping compositions of Examples 1 to 12 were prepared by adding the various components under stirring at ambient temperature in the amounts given in the following Table 1, in the following addition order (if one chemical is not part of the recipe according to Table 1, the subsequent component was added, and so on):

a) Examples 1 to 6 and 9 to 12

[0060] Water.fwdarw.silica.fwdarw.ammonia.fwdarw.carboxylic resin.fwdarw.epoxy compound.fwdarw.isocyanate.fwdarw.SBR latex.fwdarw.VP latex.fwdarw.pigment or carbon black or zinc oxide.fwdarw.wax

b) Examples 6 to 8

[0061] Water.fwdarw.ammonia.fwdarw.carboxylic resin.fwdarw.epoxy compound.fwdarw.isocyanate.fwdarw.SBR latex.fwdarw.VP latex.fwdarw.silica

[0062] The dipped cords were then passed through two additional furnaces. The temperature of the first furnace was kept between 170 and 220° C.; the temperature of the second furnace was kept between 200° C. and 250° C. It is noted that Table 1 provides the total amount (in parts by weight) of the added components and not the dry weight.

TABLE-US-00001 TABLE 1 Ex. 1 (Ref.) Ex. 2 Ex. 3 Ex. 4 Ex. 5 Ex. 6 VP latex.sup.a) 37.32 35.17 35.18 35.18 34.18 37.17 SBR latex.sup.b) 6.59 6.21 6.21 6.21 6.03 6.56 Isocyanate.sup.c) 4.71 4.44 6.64 4.26 4.14 4.50 Aerosil.sup.d) — — — — — — Dispercoll.sup.e) — 5.73 5.73 5.73 5.57 — Levasil.sup.f) — — — — 0.38 Carbon black.sup.g) — — — — — — Zinc oxide.sup.h) — — — — — — Ammonia.sup.i) — — 0.20 0.12 0.12 0.13 Carboxylic — — 0.52 0.34 0.33 0.36 resin.sup.j) Epoxy 1.67 1.57 — 1.52 1.47 1.60 compound.sup.k) Wax.sup.l) — — — — — — Pigment.sup.m) — — — — 2.83 — Water 49.71 46.85 45.53 46.63 45.30 49.27 Total 100 100 100 100 100 100 Latex/resin 4.0 4.0 4.0 4.0 4.0 4.0 Dip solid % 22.5 22.9 22.9 22.9 22.6 22.5 Ex. 7 Ex. 8 Ex. 9 Ex. 10 Ex. 11 Ex. 12 VP latex.sup.a) 35.92 35.23 33.73 34.08 34.67 36.45 SBR latex.sup.b) 6.34 6.22 5.95 6.01 6.12 6.43 Isocyanate.sup.c) 4.35 4.27 4.09 4.13 4.20 4.42 Aerosil.sup.d) — 5.59 — — — — Dispercoll.sup.e) — — — 3.81 — — Levasil.sup.f) 3.80 — — — — — Carbon black.sup.g) — — 9.62 4.86 4.94 — Zinc oxide.sup.h) — — — — — 2.31 Ammonia.sup.i) 0.13 0.13 0.12 0.12 0.12 0.13 Carboxylic 0.35 0.34 0.32 0.33 0.33 0.35 resin.sup.j) Epoxy 1.55 1.52 1.45 1.47 1.49 1.57 compound.sup.k) Wax.sup.l) — — — — 2.14 — Pigment.sup.m) — — — — — — Water 47.61 46.71 44.72 45.19 45.97 48.33 Total 100 100 100 100 100 100 Latex/resin 4.0 4.0 4.0 4.0 4.0 4.0 Dip solid % 22.8 22.4 22.6 22.8 23.2 23.1 .sup.a)Copolymer of butadiene, styrene and 2-vinylpyridine, containing approximately 15% per weight of vinylpyridine bound in the polymer, aqueous dispersion, 41% by weight; .sup.b)Styrene-butadiene copolymer, aqueous dispersion, 41% by weight; .sup.c)Grilbond IL-6: caprolactam-blocked 4,4′-methylene diphenyl diisocyanate, aqueous dispersion, 60% by weight (EMS-GRILTECH); .sup.d)Aerosil 300: fumed silica (a specific surface area of 300 m.sup.2/g, Evonik), dispersed in water using ultrasonic device, no addition of stabilizing agent, aqueous dispersion, 20% by weight; .sup.e)Dispercoll S3030/1: aqueous silica dispersion, Na stabilized, 30% by weight (a specific surface area of 300 m.sup.2/g, Covestro); .sup.f)Levasil CT16APL: aqueous silica dispersion, Na stabilized, 30% by weight (a specific surface area of 160 m.sup.2/g, Nouryon); .sup.g)aqueous carbon black dispersion prepared from N330 carbon black type by ball-milling (particle size: 0.2-0.35 microns), 23.5% by weight; .sup.h)Octocure ZNO50, aqueous ZnO dispersion, 50% by weight (Tiarco Chemical Europe GmbH); .sup.i)Ammonium hydroxide, aqueous solution, 25% by weight; .sup.j)Acrodur 950L: polyacrylate, aqueous solution, 50% by weight in water (BASF); .sup.k)Denacol EX313: glycerol-based polyglycidyl ether (Nagase Chemtex); .sup.1)Hydrowax-Q: aqueous paraffin dispersion, 54% by weight (Sasol); .sup.m)Luconyl Green 8730, pigment paste with a pigmentation level of 50%, chemical nature: Cu phthalocyanine, halogenated (BASF); a 10% aqueous solution of Luconyl Green 8730 was used.

[0063] After dipping and subsequent hot-drawing, the strengthening members were each covered with a rubberizing mixture according to Table 2. A specimen including two plies of fabric bonded with rubber was produced, in order to measure the stripping force required to separate these two plies of fabric bonded with rubber. The cord density was 90 epdm (ends per decimeter). This composite material was then cured at 170° C. under pressure (7.5 bar) for 10 minutes to obtain the final reinforced material/strengthening member.

TABLE-US-00002 TABLE 2 Constituents of rubberizing mixture Amount, phr Natural rubber 70 SBR 30 N660 carbon black 50 Zinc oxide 4 Stearic acid 2 Oil 5 Penacolite (resorcinol-formaldehyde) 3 Hexamethoxymethyl melamine 2 2,2,4-Trimethy1-1,2-dihydroquinoline 1.8 (TMQ) Sulphur 2.5 2,2′-Dibenzothiazyl disulphide (MBTS) 0.8

[0064] For all the strengthening members described, a bonding test with the above mentioned rubberizing mixture was conducted according to ISO 36:2011. The vulcanized samples were heated to 120° C. for 30 min and the bonding test was conducted within 30 seconds after removal from the oven. The results are provided in Table 3, wherein the resultant force values are given in % relative to the initial force value of Reference Example 1 which has been normalized to 100%.

[0065] The assessment of the bonding force was conducted according to DIN ISO 6133:2004-05, procedure B. In addition, the separated areas of the test samples were assessed visually on a scale from 1 to 5 using the following coverage rating.

TABLE-US-00003 1 0% completely free of rubber 2 25% mainly free of rubber 3 50% half covered by rubber 4 75% mainly covered by rubber 5 100% completely covered by rubber

[0066] The side with the poorest coverage was used for the evaluation. In determining the coverage rating, half ratings (i.e., 3.5) were also permitted. For each example, the bonding force reported and the coverage reported are the mean value from three measurements in each case. The results are also provided in Table 3.

[0067] Furthermore, also the storage stability/shelf life stability of the textile reinforcing material being treated with the dipping composition according to the present invention was evaluated. As a test of the storage stability of the treated textile reinforcing material under real conditions, an accelerated ageing test was applied by ageing the treated textile reinforcing material at 60° C. for 24 hours and 72 hours, in an air circulating oven. For the accelerated ageing test, the samples were put in the oven wound onto appropriate supports, avoiding stretching, twisting, untwisting or the formation of loops. The winding was loose enough that possible shrinkage could occur during drying without causing tension on the sample. The aged treated textile reinforcing material was then tested in the same manner as the fresh textile reinforcing material treated with the dipping composition according to the present invention. The results are also provided in Table 3. Again, the resultant force values are given in % relative to the initial force value of Reference Example 1 (set to 100%1.

TABLE-US-00004 TABLE 3 Ex. 1 (Ref.) Ex. 2 Ex. 3 Ex. 4 Ex. 5 Ex. 6 Initial adhesion 100.0 102.3 121.1 109.5 116.5 107.6 force [%] Initial coverage 3.5 3.5 3.5 5.0 5.0 5.0 Aged adhesion 90.1 n.d. n.d. n.d. n.d. 111.1 force (24 h) Aged coverage 2.5 n.d. n.d. n.d. n.d. 5.0 (24 h) Aged adhesion 64.8 98.0 96.6 117.1 110.1 68.9 force (72 h) Aged coverage 1.5 3.0 2.8 4.0 5.0 1.5 (72 h) Ex. 7 Ex. 8 Ex. 9 Ex. 10 Ex. 11 Ex. 12 Initial adhesion 121.8 130.4 121.2 105.7 123.0 115.7 force Initial coverage 5.0 5.0 4.5 4.5 5.0 4.5 Aged adhesion 111.4 n.d. n.d. n.d. n.d. n.d. force (24 h) Aged coverage 5.0 n.d. n.d. n.d. n.d. n.d. (24 h) Aged adhesion 101.3 109.1 120.7 109.2 114.5 n.d. force (72 h) Aged coverage 4.0 4.5 4.5 4.5 4.5 n.d. (72 h) n.d.: non determined

[0068] As can be seen from Table 3, the textile reinforcing material being treated with the dipping composition according to the present invention shows improved initial bonding and identical or improved initial coverage (compare Reference Example 1 with Examples 2 to 12). The addition of a base (ammonia) and a carboxylic acid functionalized polymer (carboxylic resin) leads to a further improvement of initial bonding and coverage (compare, for example, Examples 2 and 4). Table 3 also demonstrates that the claimed dipping compositions show an improved storage stability as compared to the prior art composition according to Reference Example 1. More specifically, even after ageing/storage for 24 hours and/or 72 hours, Examples 2 to 12 according to the present invention show improved adhesion and coverage as compared to the aged Reference Example 1.

Examples 13 to 15

[0069] Cords made from Rayon (2-plied, 2440 dtex, 340x340 twisted) were dipped with the aqueous dipping composition according to Example 13 (reference example) and Examples 14 and 15 (according to the present invention), respectively (see Table 4) and passed through four furnaces. The dipping compositions of Examples 13 to 15 were prepared by adding the various components under stirring at ambient temperature in the amounts given in the following Table 4, in the following addition order (if one chemical is not part of the recipe according to Table 4, the subsequent component was added, and so on): [0070] Water.fwdarw.ammonia.fwdarw.carboxylic resin.fwdarw.epoxy compound.fwdarw.isocyanate.fwdarw.SBR latex.fwdarw.VP latex.fwdarw.NR latex.fwdarw.silica

[0071] The temperature of the first furnace was kept between 170 and 220° C.; the temperatures of the second, third and fourth furnace were independently kept between 200° C. and 250° C. It is noted that Table 4 provides the total amount (in parts by weight) of the added components and not the dry weight.

TABLE-US-00005 TABLE 4 Ex. 13 (Ref.) Ex. 14 Ex. 15 VP latex.sup.a) 29.00 17.55 29.00 SBR latex.sup.n) 5.12 7.27 5.12 NR latex.sup.o) — 6.36 — Isocyanate.sup.c) 3.40 3.40 3.40 Levasil.sup.f) — 3.30 3.30 Ammonia.sup.i) 0.60 — 0.60 Carboxylic resin.sup.j) 0.40 — 0.40 Epoxy compound.sup.p) 1.20 1.20 1.20 Water 60.28 60.92 56.98 Total 100 100 100 Latex/resin 4.5 4.9 4.5 Dip solid % 18.8 20.1 19.7 .sup.a) c) f) i) j)See above for examples 1 to 12; .sup.n)Styrene-butadiene copolymer, aqueous dispersion, 67% by weight; .sup.o)Natural rubber latex, high ammonia, aqueous dispersion, 60% by weight (Neoquimica); .sup.p)Grilbond G1701: glycerol-based polyglycidyl ether (EMS-GRILTECH).

[0072] After dipping and subsequent hot-drawing, the strengthening members were each covered with a rubberizing mixture according to Table 2. The rayon material was oven dried according to ASTM D885 (1 h, 105° C.) prior to sample preparation. A specimen including two plies of fabric bonded with rubber was produced, in order to measure the stripping force required to separate these two plies of fabric bonded with rubber. The cord density was 90 epdm (ends per decimeter). This composite material was then cured at 170° C. under pressure (7.5 bar) for 10 minutes to obtain the final reinforced material/strengthening member.

[0073] The obtained strengthening members were tested as described above for Examples 1 to 12. The results are provided in Table 5, wherein the resultant force values are given in % relative to the initial force value of Reference Example 13 which has been normalized to 100%.

TABLE-US-00006 TABLE 5 Ex. 13 (Ref.) Ex. 14 Ex. 15 Initial adhesion 100.0 103.8 123.1 force [%] Initial coverage 4.3 4.5 5.0 Aged adhesion 72.9 102.7 114.4 force (72 h) Aged coverage 1.0 4.5 4.3 (72 h)

[0074] As can be seen from Table 5, the textile reinforcing material being treated with the dipping composition according to the present invention shows improved initial bonding and coverage (compare Reference Example 13 with Examples 14 and 15). Table 5 also demonstrates that the claimed dipping compositions show an improved storage stability as compared to the prior art composition according to Reference Example 1. More specifically, even after ageing/storage for 72 hours, Examples 14 and 15 according to the present invention show improved adhesion and coverage as compared to the aged reference Example 13.

Examples 16 to 19

[0075] Cords made from aramid (p-aramid, 2-plied, 1680 dtex, 330x330 twisted, adhesive activated) were pretreated by dipping the cord into a pre-dip composition containing 95.26% by weight of water, 0.90% by weight of Grilbond G1701 (an epoxy compound) and 3.84% by weight of Grilbond IL-6 (a polyisocyanate compound) and heat-treated at a temperature between 210 and 250° C. After treatment with the pre-dip composition, the cords were dipped with the aqueous dipping composition according to Example 16 (reference example) and Examples 17 to 19 (according to the present invention), respectively (see Table 6) and passed through three additional furnaces. The dipping compositions of Examples 16 to 19 were prepared by adding the various components under stirring at ambient temperature in the amounts given in the following Table 6, in the following addition order (if one chemical is not part of the recipe according to Table 6, the subsequent component was added, and so on): [0076] Water.fwdarw.ammonia.fwdarw.carboxylic resin.fwdarw.epoxy compound.fwdarw.isocyanate.fwdarw.SBR latex.fwdarw.VP latex.fwdarw.silica

[0077] The temperatures of the furnaces were independently kept between 200° C. and 250° C. It is noted that Table 6 provides the total amount (in parts by weight) of the added components and not the dry weight.

TABLE-US-00007 TABLE 6 Ex. 16 (Ref.) Ex. 17 Ex. 18 Ex. 19 VP latex.sup.a) 29.00 29.00 29.00 29.00 SBR latex.sup.b) 5.12 5.12 5.12 5.12 Isocyanate.sup.c) 3.40 3.40 3.40 3.40 Aerosil.sup.q) — 2.00 2.00 — Levasil.sup.f) — — — 6.60 Ammonia.sup.i) 0.60 0.60 0.60 0.60 Carboxylic resin.sup.j) — — 0.40 0.40 Epoxy compound.sup.p) 0.30 0.30 0.30 0.30 Water 61.58 59.54 59.15 54.58 Total 100 100 100 100 Latex/resin 6.5 6.5 6.0 6.0 Dip solid % 17.7 17.7 17.9 19.8 .sup.a) b) c) f) i) j) p)See above for examples 1 to 12; .sup.q)Aerosil300: fumed silica (a specific surface area of 300 m.sup.2/g, Evonik), dispersed in water using a mechanical stirrer, aqueous dispersion, 2% by weight.

[0078] After dipping and subsequent hot-drawing, the strengthening members were each covered with a rubberizing mixture according to Table 2. A specimen including two plies of fabric bonded with rubber was produced, in order to measure the stripping force required to separate these two plies of fabric bonded with rubber. The cord density was 90 epdm (ends per decimeter). This composite material was then cured at 170° C. under pressure (7.5 bar) for 10 minutes to obtain the final reinforced material/strengthening member.

[0079] The obtained strengthening members were tested as described above for Examples 1 to 12. The results are provided in Table 7, wherein the resultant force values are given in % relative to the initial force value of Reference Example 16 which has been normalized to 100%.

TABLE-US-00008 TABLE 7 Ex. 16 (Ref.) Ex. 17 Ex. 18 Ex. 19 Initial adhesion 100.0 105.9 117.1 127.0 force [%] Initial coverage 2.0 2.8 4.3 4.5 Aged adhesion 88.8 90.8 95.4 111.2 force (72 h) Aged coverage 1.0 1.0 1.0 2.8 (72 h)

[0080] As can be seen from Table 7, the textile reinforcing material being treated with the dipping composition according to the present invention shows improved initial bonding and coverage, and also aged adhesion (compare Reference Example 16 with Examples 17 to 19). The addition of a carboxylic acid functionalized polymer (carboxylic resin) leads to a further improvement of initial bonding and coverage and aged adhesion (compare Examples 17 and 18).

[0081] Further disclosed herein are the following items: [0082] Item 1. An aqueous dipping composition for coating a textile reinforcing material, comprising [0083] 4% to 50% by weight (dry weight) of at least one rubber latex, [0084] 0.1% to 10% by weight (dry weight) of at least one blocked isocyanate, [0085] 0.02% to 20% by weight (dry weight) of at least one filler, [0086] 0% to 6% by weight (dry weight) of at least one epoxy group-containing compound, and [0087] 0% to 15% by weight (dry weight) of at least one polymer with carboxylic acid functional groups, [0088] wherein the amounts in % by weight are based on the total weight of the aqueous dipping composition, [0089] wherein the weight ratio of rubber latex to the sum of blocked isocyanate, epoxy group-containing compound and polymer with carboxylic acid functional groups is at least 2, and [0090] wherein the composition is essentially free of resorcinol, resorcinol precondensates, formaldehyde and formaldehyde-releasing substances. [0091] Item 2. The dipping composition according to item 1, wherein the at least one rubber latex is selected from the group consisting of natural rubber latex, styrene-butadiene rubber latex, ethylene-propylene-diene rubber latex, butyl rubber latex, styrene-butadiene-vinylpyridine rubber latex, nitrile butadiene rubber latex, chloroprene rubber latex, isoprene rubber latex, butadiene rubber latex, functionalized rubber latex and combinations thereof. [0092] Item 3. The dipping composition according to item 1 or 2, wherein the at least one blocked isocyanate comprises units selected from the group consisting of tetramethylene diisocyanate, hexamethylene diisocyanate, diphenylmethane 4,4′-diisocyanate, octamethylene diisocyanate, decamethylene diisocyanate, dodecamethylene diisocyanate, aromatic diisocyanates comprising toluene 2,4- or 2,6-diisocyanate, tetramethylxylylene diisocyanate, p-xylene diisocyanate, 2,4′- or 4,4′-diisocyanatodiphenylmethane, phenyl 1,3- or 1,4-diisocyanate, and combinations thereof. [0093] Item 4. The dipping composition according to anyone of items 1 to 3, wherein the at least one filler is selected from the group consisting of silica, silicate, carbon black, graphite, graphene, fullerenes, carbon nanotubes, alkaline earth carbonates, alkaline earth oxides, zinc oxide, titanium dioxide, aluminum oxide, alkaline earth hydroxides, aluminum hydroxide and combinations thereof. [0094] Item 5. The dipping composition according to anyone of items 1 to 4, comprising [0095] 4.5% to 25% by weight (dry weight) of the at least one rubber latex, [0096] 0.2% to 4.5% by weight (dry weight) of the at least one blocked isocyanate, [0097] 0.3% to 15% by weight (dry weight) of the at least one filler, [0098] 0.2% to 4% by weight (dry weight) of the at least one epoxy group-containing compound selected from the group consisting of glycidyl-based glycerol, sorbitol-based epoxy compounds, phenol-based novolak epoxy compounds, cresol-based novolak epoxy compounds and combinations thereof, and [0099] 0.1% to 2% by weight (dry weight) of the at least one polymer with carboxylic acid functional groups based on monomers selected from acrylic acid, methacrylic acid, esters of acrylic acid, esters of methacrylic acid, itaconic acid, crotonic acid, cinnamic acid, maleic acid and combinations thereof, [0100] wherein the amounts in % by weight are based on the total weight of the aqueous dipping composition. [0101] Item 6. The dipping composition according to anyone of items 1 to 4 which contains no epoxy group-containing compound. [0102] Item 7. The dipping composition according to anyone of items 1 to 6, further comprising a base, preferably selected from the group consisting of ammonium hydroxide, sodium hydroxide and combinations thereof. [0103] Item 8. The dipping composition according to anyone of items 1 to 7, further comprising an additive selected from the group consisting of waxes, colorants, and combinations thereof. [0104] Item 9. The dipping composition according to anyone of items 1 to 8, having a solid content of 5 to 30% by weight (dry weight), preferably 7 to 27% by weight. [0105] Item 10. The dipping composition according to anyone of items 1 to 9, wherein the weight ratio of rubber latex to the sum of blocked isocyanate, epoxy-group containing compound and polymer with carboxylic acid functional groups is at least 3. [0106] Item 11. Use of the aqueous dipping composition according to anyone of items 1 to 10 for coating a textile reinforcing material, preferably selected from the group consisting of polyesters, polyamides, polyurethanes, glass, carbon, celluloses, polycarbonates, polyketones and combinations thereof. [0107] Item 12. A process for coating a textile reinforcing material, comprising the steps of [0108] treating a textile reinforcing material with the dipping composition according to anyone of items 1 to 11, preferably by dipping; and [0109] heat-treating the composition, preferably at a temperature in the range of from 60 to 260° C. [0110] Item 13. A coated textile reinforcing material obtained from the process according to item 12. [0111] Item 14. An elastomeric article comprising (i) at least one elastomeric compound and (ii) the coated textile reinforcing material according to item 13 or a textile reinforcing material that is coated with a heat-treated dipping composition according to anyone of items 1 to 10. [0112] Item 15. The elastomeric article according to item 14 which is a tire or a rubber article, such as a belt, a conveyor belt, a transmission belt, a drive belt, a hose, a strip belt, a transport belt, and an air bellow.