MX2008004530A - A liquid silicone rubber composition for textile coating - Google Patents

Abstract

The present invention relates to a liquid silicone rubber composition useful for textile coating, in particular for textile coating by screen-printing. The LSR composition of the present invention shows better film appearance and better physical properties such as softness, low-tackiness, and elongation.

Description

A COMPOSITION OF LIQUID SILICONE RUBBER FOR TEXTILE CLADDING FIELD OF THE INVENTION This invention relates to a liquid silicone rubber (LSR) composition used for textile coating, in particular, for textile coating by screen printing.

BACKGROUND OF THE INVENTION Liquid silicone rubber ("LSR") compositions, which are prior to curing in the form of liquids and after curing to form an elastomeric product are well known in the silicone industry. LSRs have been attractively used in textile printing applications due to the soft feel and durability of washing the resulting treated textiles. There are many references to the prior art that relate to LSR and its applications. Japanese Patent Publication No. H03-100058, describes a liquid silicone rubber composition comprising (a) an organopolysiloxane containing at least two unsaturated radicals bonded by silicon, (b) organohydrogenpolysiloxane containing at least three hydrogen atoms bonded by silicon, (c) finely divided inorganic porous powder, which carries a liquid material to provide antistatic property and (d) platinum catalyst. The liquid material exemplifies the fluorine-containing surfactant and the silicone polyether copolymer. This LSR is used for a fixing roller. Japanese Patent Publication No. 2002-302607 (which corresponds to US 6761673), discloses a liquid silicone rubber composition comprising organopolysiloxane containing alkenyl, organohydrogenpolysiloxane containing silicon-bonded hydrogen, cyclic diorganopolysiloxane containing at least, three alkenyl radicals, platinum catalyst and silica. These LSRs are used for a fixing roll where the fluorine-containing resin is applied to the LSR as the top coating. Japanese Patent Publication No. H09-87585 discloses a liquid silicone rubber composition comprising polydiorganosiloxane containing alkenyl, organopolysiloxane resin, inorganic filler, organohydrogenpolysiloxane, platinum catalyst, epoxidized organosilicon-containing compound, and organic titanium compound. These LSR are used for air bag coverings. EP0398745 describes a composition silicone cured by hydrosilylation comprising two silicon-containing nonionic surface active agents, one comprising silicon-bonded hydrogen atoms or unsaturated hydrocarbon silicate radicals and the other having a hydrophobic silicone portion and at least one portion of hydrophilic polyol . Such compositions are used as a material for dental impression. However, currently available LSRs, used to treat textiles, tend to provide textiles with an unsatisfactory and sticky film appearance. While this problem can be solved by increasing the viscosity and / or density of crosslinking of liquid polydiorganosiloxane, such solutions however, cause other problems, in particular, result in compositions which provide difficulty to coat on the textile and / or increase the rigidity of the fabric. the resulting coated textiles.

SUMMARY OF THE INVENTION The present invention relates to a liquid silicone rubber (LSR) composition used for textile coating, in particular, for textile coating by screen printing. The LSR composition of the present invention provides improved film appearance and improved physical properties such like, softness, low tackiness and elongation.

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a liquid silicone rubber (LSR) composition used for textile coating, which comprises: (A) 100 parts by weight of a liquid polydiorganosiloxane containing at least, two alkenyl radicals in each molecule, (B) an organohydrogenpolysiloxane containing at least three hydrogen atoms attached to silicon in each molecule, in an amount that the molar ratio of the total number of hydrogen atoms bound to silicon in this ingredient to the total amount of all the alkenyl radicals in the ingredient (A) is from 0.5: 1 to 20: 1, (C) from 5 to 50 parts by weight of a reinforcing filler, based on the amount of the ingredient (A) , (D) from 0.05 to 4.5 parts by weight of a polydiorganosiloxane-polyether copolymer, containing from 5 to 50 percent in polyether pole, based on 100 parts by weight of the combined weight of ingredients (A), (B) , and (C), and (E) a hydrosilylation catalyst.

The ingredients that can be contained in the LSR composition of the present invention are discussed below: (A) Polydiorqanosiloxane containing liquid alkenyl The ingredient (A) is a liquid polydiorganosiloxane containing at least two alkenyl radicals attached to the silicon in each molecule. Suitable alkenyl radicals in ingredient (A); preferably they contain from 2 to 10 carbon atoms, preferred examples, vinyl, isopropenyl, allyl and 5-hexenyl. The ingredient (A) preferably further comprises organic groups bonded to silicon other than alkenyl radicals. Such silicon-bonded organic groups are typically selected from saturated monovalent hydrocarbon radicals, which preferably contain from 1 to 10 carbon atoms, and monovalent aromatic hydrocarbon radicals, which preferably contain from 6 to 12 carbon atoms, which are substituted or unsubstituted with the groups that do not interfere with the curing of this inventive composition, such as halogen atoms. Preferred species of the organic groups attached to silicon are, for example, alkyl groups such as methyl, ethyl and propyl; halogenated alkyl groups such as 3, 3, 3-trifluoropropyl; and aryl groups such as phenyl. The molecular structure of the ingredient (A) is typically linear, however, they may be of some branching due to the presence of trivalent siloxane units within the molecule. To achieve a useful level of physical properties in the elastomer prepared by curing the LSR composition of the present invention, the molecular weight of the ingredient (A) must be sufficient such that it achieves a viscosity of at least 0.1 Pa.s at 25 ° C. The upper limit for the molecular weight of the ingredient (A) is not specifically restricted and is typically limited only by the processing capacity of the LSR composition of the present invention. Preferred moieties of the ingredient (A) are polydiorganosiloxanes containing alkenyl radicals at the two terminals and are represented by the general formula (I): R'R "R" 'SiO- (R "R"' SiO) m-SiOR "' R "R '(I) In the formula (I), each R' is an alkenyl radical, which preferably contains from 2 up to carbon atom, such as vinyl, allyl and 5-hexenyl. R "does not contain ethylenic unsaturation, each R" may be the same or different and is individually selected from saturated monovalent hydrocarbon radical, which preferably contains from 1 to 10 atoms of carbon, and monovalent aromatic hydrocarbon radical, which preferably contains from 6 to 12 carbon atoms. R "can be substituted or unsubstituted with one or more groups that do not interfere with the curing of this inventive composition, such as halogen atoms R" 'is R' or R ", m represents a degree of polymerization suitable for the ingredient ( A) Having a viscosity of at least 0.1 Pa.s at 25 ° C, preferably from 0.1 to 300 Pa.s Preferably, all R "and R" 'groups contained in a compound according to formula (I) are methyl groups Alternatively, at least one group R "and / or R" 'in a compound according to formula (I) is methyl and the others are phenyl or 3,3,3-trifluoropropyl. in the availability of the reactants typically used to prepare the polydiorganosiloxanes (ingredient (A)) and the properties desired for the cured elastomer prepared from compositions comprising such polydiorganosiloxanes Preferred examples of the ingredient (A) containing hydrocarbon radicals ethylenically unsaturated only in terminal groups include, but are not limited to, polydimethylsiloxane dimethylvinylsiloxy terminated, polymethyl-3,3,3-trifluoropropylsiloxane dimethylvinylsiloxy finished, copolymer of dimethylsiloxane-3,3,3-trifluoropropylmethylsiloxane dimethylvinylsiloxy terminated and dimethylsiloxane / methylphenylsiloxane dimethylvinylsiloxy terminated copolymer. In general, the ingredient (A) has a viscosity of at least 0.1 Pa.s at 25 ° C, preferably from 0.1 to 300 Pa.s, more preferably 0.1 to 100 Pa.s at 25 ° C.(B) Organohydrogenpolysiloxane The ingredient (B) is an organohydrogenpolysiloxane, which operates as a crosslinker for curing the ingredient (A), by the addition reaction of the hydrogen atoms attached to silicon in the ingredient (B) with the alkenyl groups in the ingredient (A), under the catalytic activity of the ingredient (E) to be mentioned below. The ingredient (B) normally contains 3 or more hydrogen atoms attached to silicon, so that the hydrogen atoms of this ingredient can sufficiently react with the alkenyl radicals of the ingredient (A), to form a network structure together with this and with it, cure the composition. The molecular configuration of ingredient (B) is not specifically restricted, and can be chain straight, straight chain containing branch, or cyclic. While the molecular weight of this ingredient is not specifically restricted, the viscosity is preferably from 0.001 to 50 Pas. at 25 ° C to obtain a good miscibility with the ingredient (A). The ingredient (B) is preferably added in an amount such that the molar ratio of the total number of the hydrogen atoms bonded to silicon in the ingredient (B) to the total number of all the alkenyl radicals in the ingredient (A), it is from 0.5: 1 to 20: 1. When this ratio is less than 0.5: 1, a well-cured composition will not be obtained. When the ratio exceeds 20: 1, there is a tendency for the hardness of the cured composition to increase when heated. Examples of ingredient (B) include but are not limited to: (i) trimethylsiloxy terminated methylhydro polysiloxane, (ii) trimethylsiloxy terminated polydimethylsiloxane-methylhydrogensiloxane, (iii) terminated dimethylsiloxane-methylhydrogensiloxane dimethylhydrogensiloxy copolymers, (iv) cyclic dimethylsiloxane-methylhydrogensiloxane copolymers, (v) copolymers composed of units (CH3) 2HSiO? / 2, and Si04 / 2, and (vi) copolymers composed of units (CH3) 3SiO? / 2, units (CH3) 2HSiO? / 2 and units Si04 / 2.

(C) Reinforcing filler To achieve a high level of physical properties characterizing some types of cured elastomer that can be prepared using the LSR composition of the present invention, it may be desirable to include a reinforcing filler such as finely divided silica. The silica and other reinforcing fillers are often treated with one or more known filler treatment agents to prevent a phenomenon referred to as "creping" or "crepe hardening" during the processing of the curable composition. The finely divided silica forms are preferred reinforcing fillers. Colloidal silicas are particularly preferred because of their relatively high surface area, which is typically at least 50 square meters per gram. Fillers having surface areas of at least 200 square meters per gram are preferred for use in the present invention. The colloidal silicas can be provided in the form of fumed or precipitated silica. Both types of Silicas are commercially available. The amount of finely divided silica or other reinforcing filler used in the LSR composition of the present invention is at least, in part, determined by the physical properties desired in the cured elastomer. The LSR composition of the present invention typically comprises from 5 to 50 parts, preferably from 10 to 30 parts by weight of a reinforcing filler (eg, silica), based on the weight of the polydiorganosiloxane (ingredient (A)), preferably , 5 to 50 parts and more preferably, 10 to 30 parts per 100 parts of ingredient A. When the filler is hydrophilic (eg, untreated silica fillers), it is preferably treated with a treatment agent. This may be before introduction into the composition or in situ (i.e., in the presence of at least a portion of the other ingredients of the LSR composition of the present invention, combining these ingredients together until the filler is completely treated and uniformly dispersed to a homogeneous material). Preferably, the untreated filler is treated in situ with a treatment agent in the presence of the ingredient (A). Preferably, the filler is treated on the surface using for example, a fatty acid or an ester of fatty acid, such as stearate, or with organosilanes, polydiorganosiloxanes, or organosilazanes, hexaalkyl disilazane or short-chain siloxane diols, to provide the hydrophobic fillers and, therefore, easier to handle and obtain a homogeneous mixture with the other ingredients. The surface treatment of the fillers makes the fillers easily moistened by the silicone polymer. These surface modified fillers are not clustered and can be homogeneously incorporated into the silicone polymer. This results in improved room temperature mechanical properties of the uncured compositions. Preferably, the filler treatment agent can be any of the low molecular weight organosilicon compounds described in the art, applicable to prevent creping of organosiloxane compositions during processing. The treatment agents are exemplified but not limited to liquid hydroxyl terminated polydiorganosiloxane containing an average of 2 to 20 repeating units of diorganosiloxane in each molecule, hexaorganodisiloxane, hexaorganodisilazane and the like. The hexaorganodisilazane is intended to hydrolyze under conditions used to treat the filler to form the organosilicon compounds with hydroxyl groups.

Preferably, at least a portion of the silicon-bonded hydrocarbon radicals present in the treatment agent are identical to a majority of the hydrocarbon radicals present in the ingredients (A) and (B). A small amount of water can be added along with the silica treatment agents as processing aids. It is believed that the treatment agents function by reacting with silicon-bonded hydroxyl groups present on the surface of the silica or other filler particles to reduce the interaction between these particles. The filler can be treated with the treatment agent before the formulation and the treated filler is commercially available.

(D) Polydiorganosiloxane-polyether copolymer The ingredient (D) is a polydiorganosiloxane-polyether copolymer, which is represented by the general formula (II): XwR13-wSiO (R2R3SiO) d (R4XSiO) d.SiR13-wXw (II ) (wherein X is R5- (OC2H4) and (OA) ZE) wherein R1, R2, R3 and R4 are independently selected from monovalent saturated hydrocarbon radicals, which preferably contain from 1 up to 10 carbon atoms, and monovalent aromatic hydrocarbon radicals, which preferably contain from 6 to 12 carbon atoms; E is identical or different and is selected from hydroxy, alkoxy, preferably containing from 1 to 6 carbon atoms and carboxyl; A is an alkylene preferably containing 1 to 6 carbon atoms; R5 denotes an alkylene radical which preferably contains 2 to 6 carbon atoms; w is an integer of 0, 1 or 2 and must be 1 or 2, when d 'is zero; d is an integer from 0 to 200, and d 'is an integer from 0 to 15, where d and d' are present in relative amounts to each other, such that ingredient (D) contains from 5 to 50 percent in polyether mole per molecule; y and z are independently an integer from 0 to 30, the sum of y and z is in the range from 2 to 50. R1, R2, R3 and R4 are preferably methyl. R5 is preferably propylene or iso-butylene. E is preferably hydroxyl, methoxy or acetoxy. A is preferably propylene, isopropylene or butylene. The ingredient (D) must have from 5 to 50 percent in mole of polyether units. The ingredient (D) is insoluble, but can be dispersed in a polydiorganosiloxane fluid (such as ingredient (A) and (B) described above.The ingredient (D) shows a tendency to have increased specific gravity with the increased polyether content. When the ingredient (D) has more than 50 percent mole of polyether group, its specific gravity becomes far from that of the polydiorganosiloxane fluid, which causes separation. To maintain stability after mixing, the upper limit of polyether content is 50 percent mole, and preferably 30 percent mole. It is known that the mole percentage of polyether groups can be calculated using the following formula: Number of siloxane units bound to polyether groups x 100 Total number of siloxane units in the molecule The ingredient (D) is added in an amount from 0.05 to 4.5 parts by weight, for each 100 parts by weight of the combined weight of the ingredients (A), (B) and (C).

(E) Hydrosilylation catalyst The curing of the LSR composition of the present invention is catalyzed by the ingredient (E), which is a hydrosilylation catalyst which is a metal selected from the platinum group of the periodic table, or a compound of such metal. The metals include platinum, palladium and rhodium. Platinum and platinum compounds are preferred due to the high activity level of these catalysts in the hydrosilylation reaction. Examples of preferred cure catalysts include but are not limited to, platinum black, platinum in various solid supports, chloroplatinic acids, chloroplatinic acid alcohol solutions, and chloroplatinic acid complexes with liquid ethylenically unsaturated compounds, such as olefins and organosiloxanes which they contain ethylenically unsaturated silicon-bonded hydrocarbon radicals. Complexes of chloroplatinic acid with organosiloxanes containing ethylenically unsaturated hydrocarbon radicals are described in US 3,419,593. The concentration of the ingredient (E) in the LSR composition of the present invention is equivalent to a metal concentration of the platinum group from 0.1 to 500 parts by weight of the metal of the platinum group, per parts per million (ppm), based in the combined weight of the ingredients (A) and (B). Mixtures of the ingredients mentioned above (A), (B) and (E) can begin to cure at room temperature. To obtain a prolonged working time or shelf life of the LSR composition of the present invention, a suitable inhibitor can be used for retard or suppress the activity of the catalyst. For example, alkenyl substituted siloxanes as described in US 3,989,887 can be used. Cyclic methylvinylsiloxanes are preferred. Another class of known inhibitors of platinum catalysts include acetylenic compounds described in US 3,445,420. Acetylenic alcohols such as 2-methyl-3-butin-2-ol, constitute a preferred class of inhibitors that will suppress the activity of platinum-containing catalysts at 25 ° C. Compositions containing these inhibitors typically require heating at a temperature of 70 ° C or higher to cure at a practical speed. Inhibitor concentrations as low as 1 mole of inhibitor per mole of the metal, in some cases, will impart satisfactory storage stability and cure rate. In other cases, inhibitor concentrations of up to 500 moles of inhibitor per metal mole are required. The optimum concentration for a given inhibitor in a given composition is easily determined by routine experimentation.

(F) Chain extender If desired, the LSR composition of the present invention may comprise ingredient (F), which it can be a disiloxane or a low molecular weight polyorganosiloxane containing two hydrogen atoms attached to silicon in the terminal positions. When the ingredient (F) is a disiloxane, it is represented by the general formula (NRa2Si) 20, and when the ingredient (F) is a polyorganosiloxane, it has terminal units of the general formula HRa2Si0? / 2 and non-terminal units of the formula Rb2Si0. In these formulas, Ra and Rb individually represent substituted or unsubstituted monovalent hydrocarbon radicals that are free of ethylenic unsaturation, which include, but are not limited to, alkyl groups containing from 1 to 10 carbon atoms, substituted alkyl groups containing from 1 up to 10 carbon atoms, such as chloromethyl and 3, 3, 3-trifluoropropyl, cycloalkyl groups containing from 3 to 10 carbon atoms, aryl containing 6 to 10 carbon atoms, aralkyl groups containing 7 to 10 carbon atoms , such as tolyl and xylyl, and aralkyl groups containing 7 to 10 carbon atoms, such as benzyl. Preferably, ingredient (F) is tetramethyldihydrogendisiloxane or dimethylhydrogen terminated polydimethylsiloxane. The ingredient (F) functions as a chain extender for the ingredient (A). In other words, the ingredient (F) reacts with the alkenyl radicals of the ingredient (A), thereby linking two or more molecules of the ingredient (A) together and increasing its effective molecular weight and the distance between potential crosslinking sites. The ingredient (F) may be added in an amount of 1 to 10 parts by weight, based on the weight of the ingredient (A), preferably 1 to 10 parts per 100 parts of the ingredient A. The effect of the chain extender on the properties of the cured LSR composition is similar to that using a higher molecular weight polyorganosiloxane, but without processing and other difficulties associated with high viscosity curable organosiloxane compositions. Chain extenders suitable for use in the present compositions have viscosities of about 0.001 to 1 Pa.s at 25 ° C, preferably about 0.001 to 0.1 Pa.s, to maximize the concentration of hydrogen atoms bonded to silicon and maximize viscosity of the LSR composition of the present invention. The number of silicon-bonded hydrogen groups provided in ingredient (F), when present, and in ingredient (B) is sufficient to providing the degree of crosslinking required to cure the LSR composition of the present invention to the desired physical property. The total amount of hydrogen atoms bonded to silicon contributed by the crosslinking such that the molar ratio of silicon bonded hydrogen atoms contributed by both the crosslinker and the chain extender to the vinyl or other alkenyl radicals present in the LSR composition of the present invention is from 0.5 to 20.

(G) Additional optional ingredients The LSR composition of the present invention may contain various optional ingredients that are conventionally used in such compositions, such as pigments and / or dyes. Any of the pigments and dyes, which are applicable to silicone elastomers or coat but not inhibit hydrosilylation which catalyzes the addition reaction, can be employed in this invention. The pigments and dyes include but are not limited to carbon black, titanium dioxide, chromium oxide, vanadium oxide and bismuth and the like. In a preferred embodiment of the invention, the pigments and dyes are used in the form of a master batch of pigment composed of that dispersed in the polydiorganosiloxane with a low viscosity (ingredient (A)) at the ratio of 25:75. until 70:30. The other optional ingredients comprise, for example, unreinforced fillers, such as quartz, alumina, mica and calcium carbonate; adhesion promoters; fire retardants; and heat stabilizers and / or ultraviolet light. The composition of the present invention can be prepared by combining all the ingredients at room temperature. Any of the mixing techniques and devices described in the prior art can be used for this purpose. The particular device to be used will be determined by the viscosities of ingredients and the final curable coating composition. Suitable mixers include, but are not limited to, paddle type mixers and mixer type mixers. Cooling the ingredients during mixing may be desirable to avoid premature curing of the composition. The order for the mixing of ingredients is not critical in this invention. Preferably, it is desirable to prepare, first, two parts, one comprising the ingredient (A), some of the ingredient (C) and if necessary, the inhibitor for the hydrosilylation catalyst, and the other comprising the ingredient (B), the rest of the ingredient (C) and if necessary, the inhibitor for the hydrosilylation catalyst, and wherein the ingredient (D) can be added to any of the parts before the combination of these. Then the two parts are mixed in the presence of the ingredient (E) to form the LSR composition of the present invention. The textile can be coated with the curable coating composition of the present invention, which includes but is not limited to cotton, polyester, nylon and blends thereof together or in combination with other materials such as a nylon blend comprising 2 to 20 percent of an elastic fiber such as Lycra® (trademark) of Du Pont Company). The LSR composition of the present invention can be cured by heating at a temperature of 200 to 400 ° C for 3 seconds to a few minutes. To obtain textiles that have even better properties, such as less damage, it is desirable that the LSR composition of the present invention be cured for a few seconds at the aforementioned temperature, and repeat the heating before being cooled to room temperature. In working examples, the following ingredients defined as follows are used: TABLE I Vi-Siloxane 1 Polydimethylsiloxane vinyl terminated having the viscosity of 55 Pa.s at 25 ° C Vi-Siloxane 2 Polydimethylsiloxane vinyl terminated having the viscosity of 2 Pa.s at 25 ° C H-Siloxane 1 Polydimethyl-methylhydrogensiloxane trimethylsiloxy terminated containing 0.12 % by weight of hydrogen atom bonded to silicon and the viscosity of 0.005 Pa.s at 25 ° C H-Siloxane 2 Polydimethylsiloxane hydrogendimethylsiloxy terminated having the viscosity of 0.011 Pa.s at 25 ° C Inhibitor 1 Methylvinyl cyclosiloxane (MeViSiO) n (n < 6) Inhibitor 2 1 - Ethynyl-cyclohexanol Silica 1 Hydrophobic ted fumed silica having the surface aof 225 m / g Catalyst 1 A catalyst, which is a compound solution of 0.2 weight percent of the platinum-siloxane complex prepared from platinum dichloride and 1,3-divinyltetramethyldisiloxane according to the method described in US Pat. No. 5,175,325 and 98 weight percent polydimethylsiloxane vinylimide finished ethylsiloxy having the viscosity of 0.19 Pa.s at 25 ° C and 1.8 weight percent of 1,3-divinyltetramethyldisiloxane, having a platinum content of 1000 ppm.

The silicone-polyether copolymer ("SPE") (ingredient (D)) used in the working examples, are represented by the following formula: XmM? A-mSiOiMeaSiOjDÍMeXSiOjD-SiMes-mXn, (where X for the purpose of these examples is - (CH2) 3 (OCH2CH2) p (0CH2CH (CH3)) qE) TABLE II (wherein the% by moles is from the polyether portion and the Ac is acetyl) The above ingredients are mixed in amounts shown in Table III to form homogeneous base compositions. First place the fumed silica in a container and mix it with the Vi-Siloxane with first low viscosity, and then add other ingredients to it. The SPE is selected from Table II and added to the composition in the amount shown in Table IV during the mixing procedure.

TABLE III The master batch of pigment in which the powder white pigment Ti02 is dispersed in Vi-Siloxane 2 at a ratio of 65:35, is mixed with the base composition. Then platinum catalyst is added to the pigmented composition. The amounts of those ingredients to be added to the base composition are described in Table IV. The paste that coats the composition is obtained and covered (stamped) in nylon cloth available for swimming suit with the use of a knife to a sieve. It is cured for 1.5 seconds at a temperature of 400 ° C and then stopped for 1 minute, cured for another 1.5 seconds at the same temperature. After curing, the fabric having a coated film, applied in an amount of 60 grams per square meter, is evaluated by touch to determine the hardness or softness, and by repetition of folds to determine the elongation. These operations are evaluated on a scale from E (firm) to A (loose) as shown in Table IV.

TABLE IV fifteen TABLE IV (CONTINUED) Corrida No. 16 to No. 18 are for comparison

Claims (24)

1. as ida e: year 1 in cad al ada mol 1 cio the alkenyl radicals in the ingredient (A) is 0.5: 1 up 20: 1. (E) a hydrosilylation catalyst.
2. 2. The liquid silicone rubber composition according to claim 1, characterized in that the ingredient (A) is represented by the general formula I: R'R "R" 'SÍO- (R "R"' SÍO) m-SiOR "'R" R' (I) wherein R 'is an alkenyl radical; R "does not contain ethylenic unsaturation, and is identical or different and individually selected from the monovalent saturated hydrocarbon radical and monovalent aromatic hydrocarbon radical; R '' 'is R' or R "; and m represents an equivalent degree of polymerization that the ingredient (A) has a viscosity of at least 0.1 Pa.s at 25 ° C.
3. 3. The liquid silicone rubber composition according to claim 1 or 2, characterized in that the ingredient (A) is selected from the group consisting of polydimethylsiloxane dimethylvinylsiloxy terminated, polymethyl-3, 3, 3-trifluoropropylsiloxane, dimethylvinylsiloxy terminated, copolymer dimethylsiloxane-3,3,3-trifluoropropylmethylsiloxane dimethylvinylsiloxy terminated and dimethylsiloxane / methylphenylsiloxane dimethylvinylsiloxy terminated copolymer.
4. 4. The liquid silicone rubber composition according to any of the preceding claims, characterized in that the ingredient (B) is selected from the group consisting of trimethylsiloxy-terminated methylhydrogenpolysiloxane, trimethylsiloxy-terminated polydimethylsiloxane-methylhydrogensiloxane, dimethylsiloxane-methylhydrogensiloxane-dimethylhydrogensiloxy-terminated copolymers, dimethylsiloxane-copolymers, cyclic methylhydrogensiloxane, copolymers composed of (CH3) 2HSiO? / 2 units and Si04 / 2 units, and copolymers composed of (CH3) 3SiO? / 2 units, (CH3) 2HSiO? / 2 units and SiO / 2 units.
5. 5. The liquid silicone rubber composition according to any preceding claim, characterized in that the ingredient (C) is finely divided silica.
6. The liquid silicone rubber composition according to any preceding claim, characterized in that the ingredient (D) is a polydiorganosiloxane-polyether copolymer represented by the formula: XwR13-wSiO (R2R3SiO) d (R4XSiO) d-SiR13-wXw (II) wherein X is -R5- (OC2H4) and (OA) ZE) in which R1, R2, R3 and R4 are independently selected from saturated monovalent hydrocarbon radicals and monovalent aromatic radicals; E is identical or different and is selected from hydroxy, alkoxy and carboxyl; A and R5 both denote an alkylene; W is an integer of 0, 1 or 2 and can be 1 or 2, when d 'is zero; d is an integer from 0 to 200, and d 'is an integer from 0 to 15, where d and d' are to provide the ingredient (D) containing from 5 to 50 percent per mole of polyether per molecule; and z are independently an integer from 0 to 30, the sum of y and z are in the range of 2 to 50.
7. 7. The liquid silicone rubber composition according to claim 6, characterized in that R1, R2, R3 and R4 are methyl , R5 is propylene or iso-butylene, E is hydroxyl, methoxy or acetoxy and A is propylene, iso-propylene or butylene.
8. 8. The liquid silicone rubber composition according to any of the preceding claims, characterized in that the ingredient (E) is selected from the group consisting of platinum black, platinum metal or solid supports, chloroplatinic acids, alcohol solutions of chloroplatinic acid and chloroplatinic acid complexes with ethylenically liquid unsaturated compounds.
9. 9. The composition of liquid silicone rubber according to any of the preceding claims, characterized in that it also comprises from 1 to 10 parts by weight of a chain extender as ingredient (F), which is a disiloxane or a low molecular weight polyorganosiloxane containing two hydrogen atoms linked to silicon in the terminal positions.
10. 10. A method for preparing the liquid silicone rubber composition according to any preceding claim, characterized in that it comprises mixing the ingredients (A) to (E) at room temperature.
11. A method for coating a fabric, comprising coating the fabric with a liquid silicone rubber composition and curing the resulting coating, characterized in that the liquid silicone rubber composition comprises: (A) 100 parts by weight of a liquid polydiorganosiloxane containing at least two alkenyl radicals in each molecule, (B) an organohydrogenpolysiloxane containing at least three hydrogen atoms bonded to silicon in each molecule, in an amount that the molar ratio of the total number of hydrogen atoms attached to silicon in this ingredient to the total amount of all the alkenyl radicals in the ingredient (A) is from 0.5: 1 to 20: 1, (C) from 5 to 50 parts by weight of a reinforcing filler, based on the amount of ingredient (A), (D) from 0.05 to 4.5 parts by weight of a polydiorganosiloxane-polyether copolymer, containing from 5 to 50 percent in polyether pole, based on 100 parts by weight of the combined weight of ingredients (A), (B), and (C) , and (E) a hydrosilylation catalyst.
12. The method for coating a textile according to claim 11, characterized in that the ingredient (A) of the liquid silicone rubber composition is represented by the general formula (I): R'R "R," SiO- (R "R" 'SiO) m-SiOR "' R" R '(I) wherein R 'is an alkenyl radical; R "does not contain ethylenic unsaturation, and is identical or different and individually selected from the monovalent saturated hydrocarbon radical and monovalent aromatic hydrocarbon radical; R '' 'is R' or R "; and m represents an equivalent degree of polymerization that the ingredient (A) has a viscosity of at least 0.1 Pa.s at 25 ° C.
13. 13. The method for coating a textile according to claim 11 or 12, characterized in that the ingredient (A) of the liquid silicone rubber composition is selected from the group consisting of polydimethylsiloxane dimethylvinylsiloxy terminated, polymethyl-3, 3, 3- trifluoropropylsiloxane dimethylvinylsiloxy terminated, dimethylsiloxane-3,3,3-trifluoropropylmethylsiloxane dimethylvinylsiloxy terminated copolymer and dimethylsiloxane / methylphenylsiloxane dimethylvinylsiloxy terminated copolymer.
14. The method for forming a coating layer on a textile according to any of claims 11 to 13, characterized in that the ingredient (B) of the liquid silicone rubber composition is selected from the group consisting of methylhydrogenpolysiloxane trimethylsiloxy terminated , trimethylsiloxy-terminated polydimethylsiloxane-methylhydrogensiloxane, dimethylsiloxane-methylhydrogensiloxane dimethylhydrogensiloxy-terminated copolymers, cyclic dimethylsiloxane-methylhydrogensiloxane copolymers, copolymers composed of (CH3) 2HSiO? / 2 units and Si0 / units, and copolymers composed of (CH3) 3SiO? / 2 units, (CH3) 2HSiO? / 2 and Si0 / 2 units.
15. 15. The method for coating a textile according to any of claims 11 to 14, characterized in that the ingredient (C) of the silicone rubber composition is finely divided silica.
16. 16. The method for forming a coating layer on a textile, according to any of claims 11 to 15, characterized in that the ingredient (D) of the liquid silicone rubber composition is a polydiorganosiloxane-polyether copolymer represented by the formula: XwR13-wSiO (R2R3SiO) d (R4XSiO) d SiR13-wXw (H) wherein X is -R5- (OC2H) and (OA) ZE) in which R1, R2, R3 and R4 are independently selected from monovalent saturated hydrocarbon radicals and monovalent aromatic radicals; E is identical or different and is selected from hydroxy, alkoxy and carboxyl; A and R5 both denote an alkylene; W is an integer of 0, 1 or 2 and can be 1 or 2, when d 'is zero; d is an integer from 0 to 200, and d 'is an integer from 0 to 15, where d and d' are to provide the ingredient (D) containing from 5 to 50 percent per mole of polyether per molecule; and z are independently integers from 0 to 30, the sum of y and z are in the range of 2 to 50.
17. 17. The method for coating a textile of according to claim 16, characterized in that R1, R2, R3 and R4 are methyl, R5 is propylene or iso-butylene, E is hydroxyl, methoxy or acetoxy and A is propylene, iso-propylene or butylene.
18. The method for coating a textile according to any of claims 11 to 17, characterized in that the ingredient (E) of the liquid silicone rubber composition is selected from the group consisting of platinum black, platinum metal or solid supports, chloroplatinic acids, chloroplatinic acid alcohol solutions and chloroplatinic acid complexes with ethylenically liquid unsaturated compounds.
19. The method for coating a textile according to any of claims 11 to 18, characterized in that it further comprises from 1 to 10 parts by weight of a chain extender as ingredient (F), which is a disiloxane or a polyorganosiloxane of low molecular weight containing two hydrogen atoms bonded to silicon in the terminal positions.
20. The method for coating a textile according to any of claims 11 to 19, characterized in that the textile is selected from the group consisting of cotton, polyester and nylon optionally containing an elastic fiber.
21. 21. The method for coating a textile of according to any of claims 11 to 20, characterized in that the composition is applied by screen printing.
22. 22. A textile, characterized in that it is coated with a cured composition according to any of claims 1 to 9.
23. 23. Use of a composition according to any of claims 1 to 9, for coating a textile.
24. 24. Use of a composition according to any of claims 1 to 9 for printing by screen printing a coating on a textile material.