MXPA97006731A - Employment of poly-olophines amorphas, grafted by consilanno, as a raw material adhesive or adhesive that is reticulated through hume - Google Patents

Abstract

Use of amorphous poly-alpha-olefin grafted with silane as adhesive raw material or adhesive that crosslinks by moisture. Adhesives with a high degree of adhesion, cohesion and thermal firmness or term are achieved when an adhesive containing a highly amorphous poly-alpha-olefin grafted with silane is used, in which a) the graft silane possesses at least one olefinic double bond as well as 1 to 3 alkoxy groups directly bonded to the silicon and b) the adhesive is crosslinked by the water, after achieving the adhesion

Description

EMPLOYMENT OF POLI-Q-OLEFINAS AMORFAS. Injertadas WITH YES YEAR. AS A RAW MATERIAL ADHESIVE OR ADHESIVE OUE IS RETINIC THROUGH HUMIDITY.

The object of the present invention is the use of certain amorphous poly-α-olefins, grafted with silane, as an adhesive raw material that is crosslinked by moisture or, where appropriate, as a component of an adhesive system that is crosslinked in moisture-based, especially for applications in the construction industry, wood and vehicles, where the adhesive is used in the first line as a melt adhesive. Amorphous poly-α-olefins serve as adhesive raw materials for a wide range of applications; the field of applications extends here from the hygiene sector through laminations and adhesives for packaging to gluing in construction and jobs in the processing of wood. In the majority of such applications these adhesive raw materials stand out for a high degree of adhesion to the different substrates, a marked cohesion and a good resistance to chemical substances, all of them combined with a very favorable ratio between price and performance- Many applications attractive, such as the adhesion of glass, ceramic, metal and various combinations of plastics can be made by amorphous poly-α-olefins through the formulation of the adhesive raw material with a plurality of components and additives such as adhesive resins , waxes, other polymers, softeners and stabilizers, all within a certain magnitude. However, in each case it is not possible to achieve the required values of adhesion and cohesion. Above it can be said that for certain applications the heat resistance in stored condition, those adhesions achieved with amorphous poly-α-olefins or formulations based on such substances are not sufficiently high so that the user in many cases It has to resort to more expensive reactive adhesive systems such as adhesives based on polyurethane, epoxy or silicones. In the German specification DE-OS 40 00 695 the amorphous poly-α-olefins grafted with reactive monomers have been described which find their application as melt adhesives as well as as masses of heavy coatings for mats. Thanks to the low molecular inequality caused by the manufacturing conditions, these grafted poly-α-olefins have an improved cohesion. For the attractive stickings on the other hand the cohesion thus reached is not enough; also in terms of heat resistance in storage conditions no obvious improvements are noticed. In order to improve the cohesion and the heat resistance in the stored condition, that is to say in extended times, of the adhesive layer, certain chemical bonds must also be formed between the polymer chains of the adhesive layer. Such a system is described in the German specification DE-OS 195 16 457. The system described therein on the other hand consists of 2 different polymers, in the first case being a poly-α-olefins grafted with silane, such as, for example, the ethylene copolymer. and vinyl acetate (EVA) and in the second case of a polyolefin (for example EVA) grafted to maleic acid anhydride (MSA), to which a crosslinking accelerator has been added. The management of this system of multiple components is intensive in terms of work due to the presence of the 2 components that are absolutely necessary and the investment thus generated by logistics and mixing. The systems grafted with MSA, due to their toxicological properties on the other hand, are not suitable for use in the food sector, a factor that further restricts the applicability of the system claimed there. Surprisingly it has now been found that it is possible to achieve a bond with a high degree of adhesion, outstanding cohesion and high thermal firmness in a prolonged time, when an adhesive containing a highly amorphous poly-a-olefins, grafted with silane, is used, after bonding, the adhesive is cross-linked by the application of water, possessing the silane to be applied in the graft at least one olefinic double bond as well as also 1 to 3 alkoxy groups directly attached to the silicon. The highly amorphous poly-α-olefins can be a homopolymer or a copolymer, for example atactic polypropylene (APP), atactic polybutene- (1) or preferably a copolymer or a terpolymer with the following monomeric composition: from 0 to 95% by weight weight of an α-olefin with 4 to 10 carbon atoms (preferably 3 to 95% by weight); from 5 to 100% by weight of propene (preferably from 5 to 97% by weight) and from 0 to 20% by weight of ethene. The highly amorphous poly-α-olefins either completely amorphous or have only a low crystallinity. In general terms, it should not be exceeded by a degree of crystallinity of 25%, determined by means of X-ray deflection. The graft silane preferably has 3 alkoxy groups directly bonded to the silicon. As examples we mention the vini 11 r ime t ox isi 1 a (VTMO), vinyltriethoxysilane, vinyltris (2-methoxy-ethoxy) silane, 3-methacryloxypropyltrimethoxysilane (MEMO, H2C = C (CH3) COO (CH2) 3- Si (OCH3), 3-methacryloxypropyltriethoxysilane, vinyl dimethylmethoxysilane or vinylmethyldibutoxysilane The silane is usually used during grafting in amounts of 0.1% to 10% by weight, preferably between 0.5% and 5% by weight, based on poly-a The unsaturated silane can be grafted onto the mainly amorphous poly-a-olefin according to all methods according to the state of the art, for example in solution or preferably in the melt, using a radical scavenger in an amount A suitable process is mentioned in the German specification DE-OS 40 00 695, the document of which is expressly referred to As an example, the following radical scavengers may be used: Diacylperoxy 2, for example dilauryl peroxide or didecanoyl peroxide, alkyl esters such as ter. -butyl-peroxy-2-ethylhexanoate, such as, for example, 1,1-di (tert-butylperoxy) -3,3,5-trimethylcyclohexane or 1,1-di (tert-butylperoxy) cyclohexane, dialkyl peroxides as per example ter. -butylcumyl peroxide, di (tert.-butyl) peroxide or dicumylperoxide, the radicals squeezers C as for example 3,4-dimethyl-3,4-diphenylhexane or 2,3-dimethyl-2,3-diphenylbutane as well as the compounds Azo compounds, such as 2, 2'-azo-di (2-acetoxypropane). To increase the rate of crosslinking, an accelerator for crosslinking which will usually be a tin organotin compound such as dibutyl tin dilaurate, for example, can be added to the highly amorphous polyac-olefin grafted with silane. This addition can be carried out either in pure form or to achieve a better dosage in the form of a master batch from any poly-α-olefin. The addition of the accelerator can occur before melting in the form of a "dry mix" or after melting. In such a case contents have been found to be useful from 0.001% to 20% by weight, preferably between 0.01% and 5% by weight. On the other hand, by the addition of non-grafted silanes, of easy hydrolyzate, such as hexadecyltrimethoxysilane or hexadecyltriethoxysilane, it is possible to lower the crosslinking rate or increase the stability during storage. The water that diffuses inside the adhesive layer is captured by these silanes at least in part so that it lasts for a long time before the water is available within the adhesive layer, required to cross-link the grafted poly-α-olefin. by silane. It is advisable to use silanes with long-chain alkyl radicals for this purpose since these radicals do not evaporate during the melting of the products and, therefore, are not lost as an active principle and, above all, they do not generate waste and type problems. ecological. The expert by carrying out some guiding tests can easily determine and by him only if for some of the claimed applications it will be necessary to use accelerations or retarders of crosslinking. To establish the properties required for adhesive generators such as adhesive strength, initial adhesion, viscosity, hardness, elasticity, temperature stability and oxidation and the like, it is possible to add other substances to the poly-a-olefin grafted with silane. which are commonly used to fix the desired properties of the adhesive, as for example adhesive resins (about 0.1% to 50% by weight), waxes (approximately 0.1% to 50% by weight), other polymers (about 0.1% to 80% by weight), softeners (about 0.1%) to 20% by weight) as well as those usual additives for plastics such as heat and light stabilizers, optical brighteners, antistatics, agents that increase slippage and antiblocking, core formers, fillers and dyes, pigments and flame retardants . By its nature, care must be taken that the water contained in the additives can increase the rate of crosslinking of the adhesive. The adhesive must contain, in addition to the usual additives, in this case at least 5% by weight and preferably at least 10% by weight of poly-α-olefin grafted with silanes. Of course, the silane-grafted poly-α-olefin can also be used without these additions, on the other hand. Suitable adhesive resins are, for example, synthetic terpene resin, modified terpene resin, aliphatic hydrocarbon resins, fully or partially hydrogenated resins of rosin glycerin ester, liquid resins, hydrogenated and cyclic hydrocarbon resins, aliphatic aromatic resins of hydrocarbons, penta erythritol hydrogenated esters of the colophonium resins or aromatically modified hydrocarbon resins. As waxes, basically all the usual types can be used; suitable are, for example, microcrystalline waxes, synthetic waxes of the Fischer-Tropsch type or of polyolefins as well as table waxes and amide waxes. As other polymers, the various types of rubbers or rubber, especially butyl rubber or SEBS (partially hydrogenated block copolymers of styrene-butadiene-styrene) or polyolefins, are used firstly as polyolefin in the first line isotactic polypropylene and / or amorphous poly-α-olefins. Suitable softeners are, inter alia, paraffinic or naphthenic oils as well as poly-1-butene or low molecular weight polyisobutene. The application of the silane-grafted amorphous poly-α-olefin is carried out in the form of a pure substance or also as the formulations indicated above on substrates subject to bonding, in the form of a melt, at a temperature between 50 ° C. and 300 ° C, preferably between 100 ° C and 200 ° C and particularly preferably between 130 ° C and 180 ° C. For this purpose, the most diverse application techniques can be applied, such as an application with rollers, with a wide groove nozzle, with a scraper by points, by multiple lines, with the rotothermal system, by spraying, by means of the swirling or "Swirling" or also with wide areas such as "melt blow" or "air assisted spray" procedures. Then the substrates come together in the so-called "open time" whose duration depends on the composition of the mixture applied. When the adhesive is applied by preheated substrates, rollers, etc., or by radiation at the application temperature, then for the bonding of the substrates, by its nature, a longer available time is found. The cross-linking of the system is carried out with the application of water. This occurs according to the needs of the user and depending on the properties of the substrates by means of steam from water in the environment, by treatment with steam or hot water or also by water contained in the substrates. With the adhesive according to the present invention different materials can be pasted in all kinds of possible combinations as well as in all forms of shaping, for example films, plates, fabrics and the like. As an example we mention the following materials: polyolefins (especially polyethylene, polypropylene, polybutene- (1)), polystyrene, polyvinyl chloride, polycondensates (in particular polyesters, polyamide or polyurethane), then various types of rubber (eg EPM, EPDM, NBR, SBS, SBR, BR, natural rubber, butyl rubber, chloroprene rubber or silicone rubber), wood, cellulose materials, paper and board of all kinds, fiber plates, metals ( among others iron, steel, improved steel, aluminum, bronze, brass, copper), glass, ceramic or also concrete. In these cases particularly strong adhesion is achieved and especially as regards the substrates whose surface carries OH groups. On top of this, adhesion with plastics also grows unexpectedly, the sticking of which with amorphous poly-α-olefins is normally difficult. As is typical for melt adhesives, these adhesives show an initial firmness that, in many cases, makes it unnecessary to use assembly aids just a few minutes after application. The invention will be explained in the following, with an exemplary character. Example l; A highly amorphous poly-α-olefin (APAO) of the following monomeric composition was used: 6% by weight of ethene 64% by weight of propene 30% by weight of butene- (1) Using a twin-screw extruder (Berstorff ZE 40) a mixture is mixed consisting of the following: 92% by weight of the mentioned material APAO 6.0% by weight of vinyltrimethoxysilane (DYNASILANS VTMO) and 1.1% by weight of dicumylperoxide under the exclusion of air and humidity and applying a temperature between 155 ° and 160 ° C and maintained at this temperature for a residence time of the order of 90 seconds. The excess VTMO is evaporated in the last zone of the extruder at a vacuum of approximately 20 mbar and condenses in cooling traps. The product is stabilized by the addition of IRGANOX 1076. The properties of the starting material and the product are listed in the following table.

Example 2: The silane-grafted amorphous poly-α-olefin according to Example 1 is melted at 170 ° C in the drying oven for 1 hour, under an N 2 atmosphere and then applied at a temperature of 170 °. C to a wooden test body. This wood unit is assembled within half a minute with another wooden test body on a surface of 4 cm2 with simple overlap and pressed against each other for 5 minutes, using a 2-kilogram weight. The adhesion sample is then stored for 14 days at 23 ° C and under a relative humidity of 60%, and then a tensile test and a thermal resistance test are carried out. The results of these measurements have been reported in Table 1. Example 3; The silane-grafted amorphous poly-α-olefin according to Example 1 is melted at 170 ° C in the drying oven in an N 2 atmosphere for 1 hour. Then 5% by mass of an accelerator is added in the form of a master batch consisting of 98% by weight of an amorphous poly-α-olefin (VESTOPLAST® 708) and 2% by weight dibutyl tin dilaurate. After the homogenization of the melt, the mixture is applied at a temperature of 170 ° C on a wooden test body. This wooden unit is joined to another wooden test body in the manner described in example 2, stored and tested. The results of the measurements have been reported in table 1. Example 4; (I do not understand the invention); The wood test bodies are combined in the manner described in Example 2 with the amorphous, non-functionalized poly-α-olefin: VESTOPLAST® 708, stored and tested. The results of these measurements have been reported in Table 1. The amorphous poly-α-olefin used is to a high degree comparable with that amorphous poly-α-olefin grafted with silane, used in Example 3, as regards the monomeric composition of the hydrocarbon chain and the melt viscosity.

Example 5; The amorphous poly-α-olefin grafted with silane according to Example 1 is melted in the manner described in Example 2 and is applied at a temperature of 150 ° C on a degreased glass test body with acetone. This coating is joined in a lapse of half a minute on a surface of 4 cm2 with simple overlap with another plate of glass equally defatted and the 2 plates are tightened against each other applying a 2 kg weight. The adhesion mixture is then stored for 20 days at 23 ° C and under a relative humidity of 60% to then carry out a tensile test and a term thermal resistance test. The results of these measurements are reported in Table 1. Example 6: The amorphous poly-α-olefin grafted with silane according to Example 1 and the master batch described in Example 3 are mixed in the manner described therein and the The mixture is applied at a temperature of 150 ° C on a degreased glass test body with acetone. This body is joined to another glass test body, in the manner described in example 5, is stored and tested. The results of the measurements are shown in Table 1. Example 7: (not according to the invention): 2 degreased glass test bodies are combined in the manner described in Example 5 with the amorphous poly-α-olefin and not functionalized VESTOPLAST® 708, they are allowed to stand and are tested. The results of these measurements are shown in Table 1. Example 8: The amorphous poly-α-olefin, grafted with silane, according to Example 1, is melted in the manner described in Example 2 and applied to a temperature of 150 ° C on a polyethylene test body. This coating is assembled within 30 seconds on a 4 cm2 surface with simple overlap with a test body of polyamide-6, 6 and the 2 bodies are tightened applying a 2 kg weight for 110 minutes. The adhesion sample is then stored for 24 hours at 23 ° C and under a relative humidity of 60% and then a tensile test is carried out as well as a test to determine the term thermal firmness. The results of these measurements are reported in Table 1. Example 9: The silane-grafted amorphous poly-α-olefin according to Example 1 and the master batch described in Example 3 are mixed in the manner described therein and applies the mixture at a temperature of 150 ° C on a polyethylene test body. This body is assembled in the manner described in Example 8 with a polyamide-6,6 test body being stored and tested. The results of the measurements are reported in Table 1. Example 10 (not according to the invention): A polyethylene test body is coated in the manner described in Example 8 with the non-functionalized amorphous poly-α-olefin VESTOPLAST ® 708, coupled with a polyamide-6, 6 test body is stored and tested. The results of these measurements are shown in Table 1. Example ll; The amorphous poly-α-olefin, grafted with silane, according to Example 1 is melted in the manner described in Example 2 and applied at a temperature of 150 ° C in a ceramic test body degreased with acetone. This coating is assembled within half a minute on a 4 cm2 surface with simple overlap with another ceramic plate also defatted and tighten the 2 units for 5 minutes by applying a 2 kg weight. The sample of the adhesion is then stored for 20 days at 23 ° C and under 60% relative humidity, and then a tensile test and a term thermal firmness test are carried out. The results of these measurements are reported in Table 1. Example 12; The amorphous poly-α-olefin grafted with silane of Example 1 and the masterbatch described in Example 3 are mixed in the manner described therein and the mixture is applied at a temperature of 150 ° C on a degreased ceramic test body. with acetone. This body is joined in the manner described in Example 5 to another ceramic test body and is tested. The results of the measurements are shown in Table 1. Example 13 (not according to the invention): 2 degreased ceramic test bodies are assembled in the manner described in Example 5 with the non-functionalized amorphous poly-α-olefin VESTOPLAST® 708 is stored and tested. The results of these measurements are shown in Table 1. Example 14; The silane-grafted amorphous poly-α-olefin according to Example 1 is melted in the manner described in Example 2 and is applied at a temperature of 150 ° C on an aluminum test body defatted with acetone. This coating is assembled within 30 seconds on a 4 cm2 surface with simple overlap with another aluminum plate, also defatted and for 10 minutes one body is tightened against the other by applying a 2 kg weight. The adhesion sample is then stored for 14 days at 23 ° C and under a relative humidity of 60% and then a tensile test and a thermal resistance check are carried out. The results of these measurements are reported in Table 1. Example 15; The amorphous poly-α-olefin grafted with silane according to example 1 and the masterbatch described in example 3 are mixed in the manner described therein and the mixture is applied at a temperature of 150 ° C on a test body. of aluminum defatted with acetone. This body is assembled in the manner described in Example 5 with another aluminum test body, the material is stored and tested. The results of the measurements are indicated in Table 1. Example 16 (not according to the invention); 2 degreased aluminum test bodies are assembled in the manner described in Example 5 with the non-functionalized amorphous poly-α-olefin VESTOPLAST® 708, stored and tested. The results of these measurements have been reported in Table 1.

Table 1: results of the measurements of examples 2 to 16 a) not according to the invention b) was not measured Example 17; The amorphous poly-α-olefin grafted with silane according to Example 1 is melted in the manner described in Example 2 and is applied at a temperature of 130 ° C with a 20 micron scraper on a polyethylene film. The application weight is in a state of order 11 g / m2. Above this coating a PA membrane is applied and tightened with a cylinder preheated to 80 ° C under a pressure of 500 hPa. The adhesion mixture is then stored for 24 hours at 23 ° C and under a relative humidity of 60% and then the tensile shear strength is measured according to DIN 53283. The result of this measurement is illustrated in the Table 2. Example 18; Exactly according to Example 3 a mixture of poly-α-olefin grafted with silane and the master batch is made. This mixture is applied at a temperature of 130 ° C with a 20 micron scraper on a polyethylene film, the application weight increasing to approximately 11 g / m. A PA membrane is applied to this coating in the manner described in Example 17, stored and tested. The result of this measurement is illustrated in Table 2. Example 19 (not according to the invention); A polyethylene film is coated in the manner described in Example 17 with the non-functionalized amorphous poly-α-olefin VESTOPLAST * 708. A PA membrane is applied to this coating in the manner also described in Example 17, stored and is tested. The result of these measurements has been recorded in Table 2.

Table 2: measurement results of examples 17 to 19 *) Not according to the invention.

Example 20; After melting the amorphous poly-α-olefin, grafted with silane, according to Example 1, applying a temperature of 140 ° C in a drying oven under an N 2 atmosphere, a mixture is produced at a temperature of 140 ° C. It consists of the following components. 59 parts by weight of the product of example 1 6 parts by weight of IPP (isotactic polypropylene, MFR approximately 70, VESTOLEN1 'p 2000) 1 part by weight of HOSTAMONT TP AR 504 (polypropylene modified with maleic acid anhydride) 8.5 part by weight ESCOREZ 5320 (hydrogenated cyclic hydrocarbon resin) 8.5 parts by weight of FORAL 105 (fully hydrogenated colophonium ester) 1 part by weight of VISCOL® 550 P (polypropylene wax) 17 parts by weight of Sachtleben Schwerspatmehl (heavy spar flour) CH 1177 0.2 parts by weight of IRGANOX 1076 (stabilizer) 0.1 part by weight of DHT-4A (co-stabilizer) 9.05 parts by weight of NAUGARD 445 (stabilizer) The mixture has the following properties: Softening point (RuK) 160 ° C Viscosity of the melt at 190 ° C: 12000 mPa s Needle penetration (100/25/5): 8 [0.1 mm] The mixture is tested in regarding its applicability as an adhesive in the wood industry to glue flanges (ABS on wood). The results of these measurements are reported in Table 4. Example 21 (not according to the invention); The mixture is prepared in the manner described in example 20 and according to the same composition indicated therein, with the difference that in this comparison example the non-functionalized amorphous poly-α-olefin VESTOPLAST® 792 is used instead of the amorphous poly-α-olefin grafted by silane. This type of VESTOPLAST® is selected since in comparison with the other types of VESTOPLAST available, it provides the recipe with the best properties. The mixture has the following properties: Softening point (RuK): 160 ° C Viscosity of the melt at 190 ° C: 120 000 mPa s Needle penetration (100/25/5): 10 [0.1 mm] The mixture is also tested for its applicability with adhesive in the wood industry to glue flanges. The results of these measurements are reported in Table 4. Example 22; According to Example 3, a mixture of 100 parts by weight of the dough according to Example 20 and 3.4 parts by weight of the master batch is made. The mixture has the following properties: Softening point (RuK): 160 ° C Viscosity of the melt at 190 ° C: 9000 mPa s Needle penetration (100/25/5): 9 [0.1 mm] This mixture was also proven as regards its applicability as an adhesive in the wood industry to glue flanges. The results of these measurements are recorded in Table 4.

Table 4: Results of the measurements of examples 20 to 22 *) Not according to the invention Example 23; Recipe for the adhesion of different polymer layers: 15 parts of amorphous poly-α-olefin with a viscosity of 50,000 mPa s (for example VESTOPLAST 750) 35 parts of amorphous poly-α-olefin grafted with silane according to the example 1. 30 parts of hydrogenated cyclic hydrocarbon resin (eg ESCOREZ 5300) 20 parts of softener (for example NAPVIS D 10) 0.3 parts of stabilizer (for example IRGANOX 1076) 0.1 part of co-stabilizer (for example DHT-4A) 0.05 parts of stabilizer (for example LOWINOX TBM- 6) Example 24; Recipe for a melt adhesive, sprayable: 70 parts of amorphous poly-α-olefin, grafted with silane, according to example 1. 25 parts of hydrocarbon resin (eg ESCOREZ 5380) 5 parts of softener (for example NAPVIS D 10) 0.4 parts of stabilizer (for example IRGANOX 1076) Example 25; Recipe for a multi-sheet insulating glass sealing mass with good adhesion and its metal-glass bond: 38 parts of silane-grafted amorphous poly-α-olefin of example 1. 15 parts of amorphous poly-α-olefin with a viscosity from 50,000 mPa s (for example VESTOPLAST 750) 1.5 parts of rubber (for example KRATON G 1657) 30 parts of softener (for example OPPANOL B 15) 7.5 parts of butyl rubber (for example PB 402-24) 7.5 parts of softener ( for example BEVILITE 62-107) 0.4 parts of soot (for example PRINTEX 60) 0.3 parts of stabilizer (for example IRGANOX 1076) 0.1 part of co-stabilizer (for example DHT-4A) 0.1 part of stabilizer (for example NAUGARD 445) Example 26; Recipe for a flange gluing mass that is distinguished by a low viscosity to the application, an excellent coherence and term thermal firmness: 59 parts of amorphous poly-α-olefin grafted with silane, according to example 1. 5 parts of PP and its tactician with an MFR value of approximately 70 (for example VESTOLEN P 2000) 1 part of PP modified with maleic acid anhydride (for example HOSTAMONT TP AR 504) 8.5 parts of hydrogenated cyclic hydrocarbon resin (eg ESCOREZ 5320) 8.5 parts of glycerin ester of fully hydrogenated rosin (eg FORAL 105) 1 part of polypropylene wax (eg VISCOL) 550 P) 17 parts of heavy spar (for example the heavy spar SACHTLEBEN 1177) 0.2 parts of stabilizer (for example IRGANOX 1076) 0.1 part of co-stabilizer (for example DHT-4A) 0.5 parts of stabilizer (for example NAUGARD 445)

Claims (9)

1. CLAIMS 1. The use of an adhesive containing a highly amorphous poly-α-olefin, grafted with silane, in which a) the grafting silane has at least one olefinic double bond as well as also 1 to 3 alkoxy groups linked directly to the silicon and ) the adhesive is reticulated after its adhesion, by means of water, intended to obtain adhesions.
2. 2. The use of an adhesive according to the claim 1 in which the silane is used in the graft in amounts of 0.1% to 10% by weight with respect to the poly-α-olefin.
3. 3. The use of an adhesive according to any of the preceding claims, in which vinyltrimethoxysilane, vinyltriethoxysilane, vinyltris (2-methoxy-ethoxy) silane, 3-methacryloxypropyltrimethoxysilane, 3-methacryloxypropyltriethoxysilane, vinyl dimethylmethoxysilane or vinyltrimethoxysilane are used as the silane in the graft. vinylmethyldibutoxosilane.
4. 4. The use of an adhesive according to any of the preceding claims wherein the highly amorphous poly-α-olefin is an atactic polypropylene, an atactic polybutene- (1) or a copolymer or terpolymer with the following monomeric composition: 0 to 95 % by weight of an α-olefin with 4 to 20 carbon atoms. From 5 to 100% by weight of propene and from 0 to 20% by weight of ethene.
5. 5. The use of an adhesive according to claim 4 in which the highly amorphous poly-α-olefin has the following monomer composition: From 3 to 95% by weight of an α-olefin with 4 to 10 carbon atoms, of 5 to 97% by weight of propene and from 0 to 20% by weight of ethene.
6. 6. The use of an adhesive according to any of the preceding claims in which additionally are contained in the same adhesive resins, waxes, other polymers, softeners, stabilizers, optical brighteners, antistatic, auxiliary for sliding and blocking, nucleating agents, fillers, dyes, pigments and / or flame retardants.
7. 7. The use of an adhesive according to claim 6 wherein within it a) from 0.1 to 50% by weight of adhesive resins and / or ob) from 0.1 to 50% by weight of waxes and / or c) from 0.1 to 50 are present. 80% by weight of other polymers and / or from 20 to 20% by weight of softener.
8. 8. The use of an adhesive according to any of the preceding claims wherein within the adhesive is contained at least 10% by weight of poly-α-olefin grafted with silane.
9. 9. The use of an adhesive according to any of the preceding claims, said adhesive being a melt adhesive.