Binder-consolidated textile fabric, method for producing it, and use thereof

Abstract

The invention relates to a novel binder system and its use for bonding textile fabrics as well as products containing such bonded textile fabrics. The materials of the invention are suitable for the manufacture of lining materials which can be used in the manufacture of sarking membranes, roofing sheets and water-proof sheetings, in particular of coated sarking membranes, roofing sheets and water-proof sheetings, or in the manufacture of carpets and PVC floorings as a textile backing or as a textile reinforcement.

1 . A binder system, comprising:
 a) 10 to 90% by weight, preferably 30 to 70% by weight of at least one polyvinyl acetate and   b) 90 to 10% by weight, preferably 70 to 30% by weight of one or more starches and   c) 0 to 60% by weight of at least one additive selected from the group of amphoteric hydroxides, salts of the first and second main groups of the periodic table, mineral additives which are of synthetic or natural origin, kaolin, carbon blacks or mixtures thereof and   d) 0 to 10% by weight of additives,   the information on the proportions by weight referring to the dry mass of the binder system, i.e. without water and the sum of the constituents a) to d) giving 100% by weight.   
     
     
         2 . The binder system according to  claim 1 , characterized in that it does not contain any polymers based on polyacrylates. 
     
     
         3 . The binder system according to  claim 1  or  2 , characterized in that the polyvinyl acetate is homopolymers of vinyl acetate and co- or terpolymerizates of vinyl acetate. 
     
     
         4 . The binder system according to  claim 3 , characterized in that the homopolymers of the polyvinyl acetate contain up to 5 mole % further constituents which derive from other monomers than vinyl acetate. 
     
     
         5 . The binder system according to  claims 1  to  4 , characterized in that it is a polyvinly acetate having a glass temperature of 18 to 45° C. 
     
     
         6 . The binder system according to  claims 1  to  5 , characterized in that it is a polyvinyl acetate having a degree of polymerization of between 100 and 5000. 
     
     
         7 . The binder system according to  claims 1  to  6 , characterized in that it is a polyvinyl acetate whose molecular weight (weight average) is between 10000 and 1500000 g/mol. 
     
     
         8 . A binder system, comprising:
 a) 10 to 90% by weight, preferably 30 to 70% by weight of polymerizates based on carboxylic acid derivatives and   b) 90 to 10% by weight, preferably 70 to 30% by weight of one or more starches and   c) 0 to 60% by weight of at least one additive selected from the group of amphoteric hydroxides, salts of the first and second main groups of the periodic table, mineral additives which are of synthetic or natural origin, kaolin, carbon blacks or mixtures thereof and   d) 0 to 10% by weight of additives,   the information on the proportions by weight referring to the dry mass of the binder system, i.e. without water and the sum of the constituents a) to d) giving 100% by weight, and the polymerizates based on carboxylic acid derivatives having been obtained by means of polymerization of monomeric carboxylic acid derivatives which have at least one terminal double bond.   
     
     
         9 . The binder system according to  claim 8 , characterized in that the polymerizates based on carboxylic acid derivatives and polycarboxylic acids still have unsaturated constituents and/or are used as a mixture with unsaturated monomeric carboxylic acid derivatives. 
     
     
         10 . The binder system according to  claim 8  or  9 , characterized in that the monomeric carboxylic acid derivatives, which have at least one terminal double bond, are unsaturated carboxylic acid esters, preferably unsaturated acrylates and/or methacrylates which have been esterified by converting the basic acids and/or mono- or polyvalent, branched or linear C 1  to C 4  alcohol. 
     
     
         11 . The binder system according to  claim 10 , characterized in that the C 1  to C 4  alcohol is methanol, ethanol, propanol, iso-propanol, butanol, 1-butanol, 2-butanol or tert-butanol. 
     
     
         12 . The binder system according to  claims 8  to  10 , characterized in that the unsaturated carboxylic acid is acrylic acid and/or methacrylic acid. 
     
     
         13 . The binder system according to  claims 1  to  12 , characterized in that the starch is a natural or modified starch or starch derivates. 
     
     
         14 . The binder system according to  claims 1  to  13 , characterized in that the starch is a starch from vegetable raw material, in particular from tubers, seeds, fruit, and/or from pith. 
     
     
         15 . The binder system according to  claims 1  to  14 , characterized in that the starch is of native vegetable origin or is chemically modified, enzymatically extracted, of recombinant origin or is manufactured by biotransformation (biocatalysis). 
     
     
         16 . The binder system according to  claims 1  to  15 , characterized in that, in addition to the starch, this has at least two constituents selected from the group of amphoteric hydroxides, salts of the first and second main groups of the periodic table, mineral additives which are of synthetic or natural origin, kaolin, carbon blacks, and the ratio is preferably 1:10 to 10:1 (proportions by weight). 
     
     
         17 . The binder system according to  claims 1  to  16 , characterized in that it is a dispersion and that the polymer solids content of the dispersion, in particular the polymer solids content of the dispersions, is between 10 and 40% by weight, in particular between 10 and 30% by weight, particularly preferably 15 to 25% by weight. 
     
     
         18 . The binder system according to  claims 1  to  17 , characterized in that it is a dispersion and the viscosity of the dispersion is preferably 1 to 3000 mPa*s, in particular 2 to 2500 mPa*s, particularly preferably 5 to 2000 mPa*s. 
     
     
         19 . Use of the binder system according to one or more of  claims 1  to  18  for the consolidation of textile fabrics. 
     
     
         20 . A textile fabric which has been consolidated by means of a binder system according to one or more of  claims 1  to  7  and  13  to  18  and comprises
 a) 10 to 90% by weight, preferably 30 to 70% by weight of at least one polyvinyl acetate and 
 b) 90 to 10% by weight, preferably 70 to 30% by weight of one or more starches and 
 c) 0 to 60% by weight of at least one additive selected from the group of amphoteric hydroxides, salts of the first and second main groups of the periodic table, mineral additives which are of synthetic or natural origin, kaolin, carbon blacks or mixtures thereof and 
 d) 0 to 10% by weight of additives, 
 the information on the proportions by weight referring to the dry mass of the binder system, i.e. without water and the sum of the constituents a) to d) giving 100% by weight. 
 
     
     
         21 . A textile fabric which has been consolidated by means of a binder system according to one or more of  claims 8  to  18  and comprises
 a) 10 to 90% by weight, preferably 30 to 70% by weight of polymerizates based on carboxylic acid derivatives and 
 b) 90 to 10% by weight, preferably 70 to 30% by weight of one or more starches and 
 c) 0 to 60% by weight of at least one additive selected from the group of amphoteric hydroxides, salts of the first and second main groups of the periodic table, mineral additives which are of synthetic or natural origin, kaolin, carbon blacks or mixtures thereof and 
 d) 0 to 10% by weight of additives, 
 the information on the proportions by weight referring to the dry mass of the binder system, i.e. without water and the sum of the constituents a) to d) giving 100% by weight, and the polymerizates based on carboxylic acid derivatives having been obtained by means of polymerization of monomeric carboxylic acid derivatives which have at least one terminal double bond. 
 
     
     
         22 . The textile fabric according to  claim 20  or  21 , characterized in that the applied quantity of the binder system is between 5 and 35 wt % of dry binder in relation to the total weight of the raw textile fabric. 
     
     
         23 . The textile fabric according to  claims 20  to  22 , characterized in that said textile fabric is any structure composed of fibers which has been manufactured according to a surface forming method. 
     
     
         24 . The textile fabric according to  claims 20  to  23 , characterized in that it is a textile fabric on the basis of natural fibers, fibers composed of synthetic products and/or fibers composed of synthesized polymers. 
     
     
         25 . The textile fabric according to  claims 20  to  24 , characterized in that said textile fabric is a woven fabric, a yarn sheet, a knitted fabric and/or a non-woven fabric. 
     
     
         26 . The textile fabric according to  claims 20  to  25 , characterized in that the textile fabrics are non-wovens made of synthetic polymer fibers, preferably a spinbonded non-woven. 
     
     
         27 . A textile fabric according to  claims 20  to  26 , characterized in that said textile fabric is a non-woven fabric made of fibers of glass fibers and/or mineral fibers. 
     
     
         28 . The textile fabric according to  claim 27 , characterized in that the textile fabric has a weight per unit area of 20 and 500 g/m 2 . 
     
     
         29 . Use of the textile fabric according to one or more of  claims 20  to  28  as a lining material, optionally in combination with at least one further textile fabric, for coated sarking membranes, roofing sheets and water-proof sheetings as well as a textile backing or a textile reinforcement in floorings, in particular in carpets and PVC floorings. 
     
     
         30 . A lining material for sarking membranes, roofing sheets and water-proof sheetings, textile backings or textile reinforcements in floorings, in particular in carpets and PVC floorings, comprising at least one textile fabric according to one or more of  claims 20  to  28 . 
     
     
         31 . The lining material according to  claim 30 , characterized in that it has at least one additional reinforcement. 
     
     
         32 . A lining material according to  claim 30  or  31 , characterized in that it has at least one further textile fabric besides the textile fabric according to one or more of  claims 20  to  28  which differ from each other. 
     
     
         33 . Use of the lining material according to one or more of  claims 30  to  32  for the manufacture of lining materials for sarking membranes, roofing sheets and water-proof sheetings, in particular for the manufacture of coated sarking membranes, roofing sheets and water-proof sheetings, for the manufacture of textile backings or as a textile reinforcement in floorings, in particular in carpets and PVC floorings. 
     
     
         34 . A coated sarking membrane, roofing sheet and water-proof sheeting, comprising at least one coating compound and at least one textile fabric according to one or more of  claims 20  to  28  or a lining material according to one or more of  claims 30  to  32 . 
     
     
         35 . A flooring, in particular a carpet or a PVC flooring, comprising a textile backing or a textile reinforcement comprising at least one textile fabric according to one or more of  claims 20  to  28  or a lining material according to one or more of  claims 30  to  32 .