EP0000929B1 - Polysiloxanes based compositions convertible into elastomers by cross-linking - Google Patents

Polysiloxanes based compositions convertible into elastomers by cross-linking Download PDF

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Publication number
EP0000929B1
EP0000929B1 EP78100691A EP78100691A EP0000929B1 EP 0000929 B1 EP0000929 B1 EP 0000929B1 EP 78100691 A EP78100691 A EP 78100691A EP 78100691 A EP78100691 A EP 78100691A EP 0000929 B1 EP0000929 B1 EP 0000929B1
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denotes
radicals
silicon
bonded
formula
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German (de)
French (fr)
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EP0000929A1 (en
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Erhard Dr. Bosch
Karl Braunsperger
August Dr. Schiller
Eckhart Dr. Louis
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Wacker Chemie AG
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Wacker Chemie AG
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    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L83/00—Compositions of macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon with or without sulfur, nitrogen, oxygen or carbon only; Compositions of derivatives of such polymers
    • C08L83/04—Polysiloxanes
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G77/00—Macromolecular compounds obtained by reactions forming a linkage containing silicon with or without sulfur, nitrogen, oxygen or carbon in the main chain of the macromolecule
    • C08G77/04—Polysiloxanes
    • C08G77/045—Polysiloxanes containing less than 25 silicon atoms
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G77/00—Macromolecular compounds obtained by reactions forming a linkage containing silicon with or without sulfur, nitrogen, oxygen or carbon in the main chain of the macromolecule
    • C08G77/04—Polysiloxanes
    • C08G77/14—Polysiloxanes containing silicon bound to oxygen-containing groups
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G77/00—Macromolecular compounds obtained by reactions forming a linkage containing silicon with or without sulfur, nitrogen, oxygen or carbon in the main chain of the macromolecule
    • C08G77/04—Polysiloxanes
    • C08G77/14—Polysiloxanes containing silicon bound to oxygen-containing groups
    • C08G77/16—Polysiloxanes containing silicon bound to oxygen-containing groups to hydroxyl groups
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G77/00—Macromolecular compounds obtained by reactions forming a linkage containing silicon with or without sulfur, nitrogen, oxygen or carbon in the main chain of the macromolecule
    • C08G77/04—Polysiloxanes
    • C08G77/14—Polysiloxanes containing silicon bound to oxygen-containing groups
    • C08G77/18—Polysiloxanes containing silicon bound to oxygen-containing groups to alkoxy or aryloxy groups
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G77/00—Macromolecular compounds obtained by reactions forming a linkage containing silicon with or without sulfur, nitrogen, oxygen or carbon in the main chain of the macromolecule
    • C08G77/04—Polysiloxanes
    • C08G77/22—Polysiloxanes containing silicon bound to organic groups containing atoms other than carbon, hydrogen and oxygen
    • C08G77/26—Polysiloxanes containing silicon bound to organic groups containing atoms other than carbon, hydrogen and oxygen nitrogen-containing groups
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G77/00—Macromolecular compounds obtained by reactions forming a linkage containing silicon with or without sulfur, nitrogen, oxygen or carbon in the main chain of the macromolecule
    • C08G77/42—Block-or graft-polymers containing polysiloxane sequences
    • C08G77/46—Block-or graft-polymers containing polysiloxane sequences containing polyether sequences
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S528/00—Synthetic resins or natural rubbers -- part of the class 520 series
    • Y10S528/901—Room temperature curable silicon-containing polymer
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/31504—Composite [nonstructural laminate]
    • Y10T428/31551—Of polyamidoester [polyurethane, polyisocyanate, polycarbamate, etc.]
    • Y10T428/31609—Particulate metal or metal compound-containing
    • Y10T428/31612—As silicone, silane or siloxane
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/31504—Composite [nonstructural laminate]
    • Y10T428/31652—Of asbestos
    • Y10T428/31663—As siloxane, silicone or silane
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/31504—Composite [nonstructural laminate]
    • Y10T428/31678—Of metal

Definitions

  • constituent (3) is at least one silane, that is to say a monomeric silicon compound, this silane, in addition to at least one amino group bonded to silicon via carbon, at least one monovalent hydrocarbon radical which is bonded to silicon via oxygen and is optionally substituted by an amino or alkoxy group contains.
  • the compositions according to the invention have the particular advantage that they crosslink completely even in thicker layers.
  • the compositions according to the invention are completely crosslinked in thicker layers even if they do not contain any condensation catalysts, such as dibutyltin dilaurate.
  • the invention relates to the exclusion of water-storable masses of (1) diorganopolysiloxane having end groups capable of condensation when water is admitted at room temperature, (2) a total of at least three amino groups bonded to silicon via nitrogen and / or oxime groups bonded to silicon via oxygen per molecule of silicon compound and at least one (3) organosilicon compound with at least one amino group bonded to silicon via carbon as at least one further constituent, characterized in that at least part of organosilicon compound (3) contains at least one siloxane oxygen atom and in amounts of 0.1 to 20 percent by weight, based on the total weight of the mass, is included.
  • compositions according to the invention can be prepared from the same diorganopolysiloxanes (1) which have end groups capable of condensation and from which the hitherto known compositions of diorganopolysiloxane which have condensable end groups and which crosslink under the exclusion of water and which adhere to water when exposed to water at room temperature, and a total of at least three amino groups bonded to silicon via nitrogen and / or oxime groups bonded to silicon via oxygen could be prepared per silicon compound having a molecule.
  • the diorganopolysiloxanes (1) which are mostly used for the production of such compositions and which are also preferably used in the context of the invention have diorganopolysiloxanes (1) by the general formula are reproduced.
  • R 3 means identical or different, monovalent, optionally substituted and / or polymeric hydrocarbon radicals and x is an integer with a value of at least 10.
  • siloxane units in addition to the diorganosiloxane units (SiR30).
  • examples of such other siloxane units, which are usually only present as impurities, are those of the formulas R 3 SiO 3/2 , R 3 3 SiO 1/2 and Si0 4 , z , where R 3 has the meaning given above for each.
  • the amount of such siloxane units as diorganosiloxane units is preferably at most 10 mol percent, in particular at most 1 mol percent, in each case based on the weight of the diorganopolysiloxanes (1).
  • the hydroxyl groups in the above-mentioned diorganopolysiloxane group having condensable end groups can, if desired, be completely or partially replaced by condensable groups other than Si-bonded hydroxyl groups.
  • Examples of such other groups capable of condensation are connected in particular via nitrogen to silicon bonded amino groups, as will be explained in more detail below, through oxygen to silicon-bonded oxime groups, as will also be discussed in more detail below, alkoxy groups having 1 to 5 carbon atoms and Alkoxyalkylenoxy phenomenon 1 to 5 carbon atoms, like the rest of the formula CH 3 0CH Z CH z O-.
  • hydrocarbon radicals R 3 are alkyl radicals, such as the methyl, ethyl, n-propyl and isopropyl radical and octadecyl radicals; Alkenyl groups such as the vinyl and allyl groups; cycloaliphatic hydrocarbon radicals, such as the cyclopentyl and cyclohexyl radical and methylcyclohexyl and cyclohexenyl radicals; Aryl groups such as phenyl groups and xenyl groups; Aralkyl radicals, such as the benzyl, beta-phenylethyl and beta-phenylpropyl radicals; and alkaryl radicals, such as tolyl radicals.
  • alkyl radicals such as the methyl, ethyl, n-propyl and isopropyl radical and octadecyl radicals
  • Alkenyl groups such as the vinyl and allyl groups
  • Substituted hydrocarbon radicals R 3 are haloaryl radicals, such as chlorophenyl and bromophenyl radicals; and cyanalkyl radicals, such as the beta-cyanoethyl radical, are preferred.
  • substituted polymeric and unsubstituted polymeric hydrocarbon radicals R 3 where such polymeric hydrocarbon radicals can also be referred to as modifying hydrocarbon radicals are, in particular, those which, when polymerizable compounds are polymerized by means of free radicals in the presence of diorganopolysiloxanes of the general formula where x has the meaning given above and R is the same or different, monovalent, optionally substituted hydrocarbon radicals are formed.
  • Examples of polymerizable compounds which can be used in such a polymerization carried out in the presence of diorganopolysiloxane are vinyl acetate, ethylene, styrene, acrylic acid, methacrylic acid, acrylic acid esters such as n-butyl acrylate, methacrylic acid esters such as n-butyl methacrylate, acrylonitrile and methacrylonitrile, and Mixtures of at least two of the monomers mentioned, such as mixtures of vinyl acetate and ethylene.
  • At least 50% of the number of SiC-bonded residues in diorganopolysiloxane (1) and thus the residues R 3 in the formulas given above are preferably methyl residues.
  • the diorganopolysiloxanes (1) which have condensable end groups can be homopolymers or copolymers. Mixtures of different diorganopolysiloxanes with condensable end groups can be used.
  • the viscosity of the diorganopolysiloxanes having condensable end groups is advantageously 100 to 500,000 mPa.s at 25 ° C.
  • a total of at least three amino groups bonded to silicon via nitrogen and / or oxime groups bonded via silicon to oxygen per molecule can also contain the same silicon compounds with a total of at least three amino groups bonded to silicon via nitrogen and / or Oxime groups bonded to silicon via oxygen are used per molecule, which have also been used hitherto for the preparation of compositions which can be stored in the absence of water and which crosslink to form elastomers when water is admitted at room temperature by mixing such a silicon compound with diorganopolysiloxane having condensable end groups.
  • silicon compounds (2) which can be used in the context of the invention are thus aminosilanes of the general formula wherein R has the meaning given above for it, R 1 is hydrogen or a monovalent, optionally substituted hydrocarbon radical and a is 0 or 1, and their partial hydrolysates containing at most 10 silicon atoms per molecule.
  • substituted and unsubstituted hydrocarbon radicals R also apply in full to the substituted and unsubstituted hydrocarbon radicals R 1 .
  • Further examples of hydrocarbon radicals R 1 are the n-butyl, sec-butyl and the tert-butyl radical.
  • Preferred radicals R 1 are the sec-butyl and the cyclohexyl radical.
  • examples of silicon compounds (2) are also silanes of the general formula wherein R, R 'and X each have the meaning given above and c is on average at least 0.1, preferably at least 0.5 and at most 2.9, the sum of a + c being at most 3.
  • silicon compounds (2) are methyltris (n-butylamino) silane, methyltris (sec.butylamino) silane, methyltris (cyclohexylamino) silane, methyltris (methylethylketoxirn) silane, methylbis (methylethylketoxime) -cyclohexylaminosilane and methyltris (acetone oxime) -silane.
  • Mixtures of different silicon compounds (2) e.g. a mixture of 1 mol of methyl tris (cyclohexylamino) silane and 2 mol of methyl tris (methyl ethyl ketoxime) silane can be used.
  • the total of at least three amino groups per molecule bonded to silicon via nitrogen and / or oxime groups bonded to silicon via oxygen (2) is preferably used in amounts such that there are a total of at least three amino groups bonded to silicon via nitrogen and / or oxime groups bonded to silicon via oxygen per end group capable of condensation in the diorganopolysiloxane (1).
  • 0.2 to 15 percent by weight, usually 1 to 8 percent by weight, based in each case on the total weight of the particular mass, of silicon compound (2) is used.
  • organosilicon compound (3) with at least one amino group bonded to silicon via carbon and at least one siloxane oxygen atom it is also possible, for example, to use compounds of the general formula where R and a each have the meaning given above, are used. Particularly because of the easy accessibility, organosilicon compounds (3) are those of the general formula prefers.
  • R has the meaning given above for it, A means identical or different radicals of the formula where R 1 and a each have the meaning given above, Q is oxygen or the grouping -NR 'and p is an integer from 1 to 10, Y are identical or different radicals of the formula where A, R and a each have the meaning given above, R I is hydrogen or the same or different monovalent hydrocarbon radicals which are optionally interrupted by at least one ether oxygen atom, b O, 1, 2 or 3 and the sum of a + b is at most 3, m means 0 or an integer from 1 to 2,000 and n O or an integer from 1 to 1,000, with the proviso that at least one radical A is present per organopolysiloxane (3).
  • R is also preferably the methyl radical in the organosilicon compound (3).
  • radicals A are those of the following formulas:
  • R 1 in group A preferably denotes hydrogen. However, R 1 does not always have to be hydrogen, as is the case with the grouping is illustrated. As can also be seen from the above formulas, the values p in one and the same grouping A and thus also in different groupings A can be the same or different.
  • radicals A are those of the general formula where Q has the meaning given above, preferred.
  • the radicals R 2 preferably have 1 to 18 carbon atoms, but the methyl and ethyl radicals are particularly preferred.
  • the most important example of a hydrocarbon radical R 2 interrupted by an ether oxygen atom is the methoxyethylene radical.
  • M is preferably an integer from 3 to 1,000. It is further preferred that in the compounds of the general formula Y (OSiR 2 ) m (OSiAR) n OY at most 100 units of the formula R z SiO there are a for each grouping.
  • organosilicon compounds (3) of the preferred type are those of the general formula where R, A and n each have the meaning given above and m 'is an integer with a value of at least 3.
  • the preparation of such organopolysiloxanes is known, for example from FR-PS 11 84 097, published: July 16, 1959, applicant: Union Carbide Corporation, and FR-PS 12 97 045, published by "Bulletin founded de la Propriete industrial" No. 25 1962, applicant: Union Carbide Corporation.
  • organosilicon compounds (3) of the preferred type are those of the general formula where R, R 2 , A, m 'and n each have the meaning given above.
  • organopolysiloxanes can, for example, by reacting at least one compound of the general formula where A, R and R 2 each have the meaning given above, with at least one organopolysiloxane of the general formula where R and m 'each have the meaning given above, optionally in the presence of a condensation catalyst, such as sodium hydroxide or dibutyltin dilaurate, with elimination of a compound of the general formula getting produced.
  • a condensation catalyst such as sodium hydroxide or dibutyltin dilaurate
  • organosilicon compounds (3) of the preferred type are also those of the general formula wherein R, R 2 , A, b, m 'and n each have the meaning given above, with the proviso that there is at least one group A per molecule.
  • the preparation of such organopolysiloxanes is also known, for example from DE-OS 23 39 761, published February 21, 1974, applicant: Stauffer Chemical Co., and FR-PS 12 94 235, published by "Bulletin founded de la Propriete industrial no. 21 of 1962, applicant: Dow Corning Corporation.
  • siloxane units SiR 2 O and SiARO can also be present within or along the siloxane chains of the formulas given above for organosilicon compounds (3).
  • examples of such other siloxane units are those of the formulas RSi0 3 , 2 , R 3 SiO 1/2 and Si0 "2, where R in each case has the meaning given above.
  • the amounts of such siloxane units as diorganosiloxane units are also in the organosilicon compounds (3 ) preferably at most 10 mole percent.
  • the organosilicon compounds (3) are used in amounts of 0.1 to 20 percent by weight, in particular 0.1 to 5 percent by weight, in each case based on the total weight of the composition.
  • At least one siloxane oxygen atom can also be used in the preparation of the compositions according to the invention which have also been used up to now in the preparation of compositions from the silicon compounds (1) and (2) which can be stored in the absence of water and which crosslink to form elastomers when water enters at room temperature could.
  • Examples of such additionally usable substances are reinforced fillers, non-reinforcing fillers, pigments, soluble dyes, fragrances, organopolysiloxane resins, including those made from (CH 3 ) 3 SiO 1/2 and SiO 4/2 units, organic resins, such as polyvinyl chloride powder, corrosion inhibitors , Oxidation inhibitors, heat stabilizers, solvents, other agents for improving the adhesion of the elastomers produced from the compositions to the substrates on which the elastomers were produced, such as the compound of the formula CH 3 Si [O (CH 2 ) 2 NH 2 ] 2 ( CH 2 ) 3 O (CH 2 ) 2 NH 2 , condensation catalysts, such as tin salts or organotin salts of carboxylic acids, for example dibutyltin dilaurate or aliphatic basic nitrogen compounds, for example 3-ethoxypropylamine-1 or n-hexylamine, plasticizers, such as dimethylpolys
  • reinforcing fillers that is to say fillers with a surface area of at least 50 m 2 / g
  • fillers with a surface area of at least 50 m 2 / g are, in particular, pyrogenically produced silicon dioxide, silica hydrogels dehydrated while maintaining the structure and other types of precipitated silicon dioxide with a surface area of at least 50 ml / g.
  • other fillers with a surface area of at least 50 m 2 / g can be used instead of the named types of silicon dioxide or together with these types of silicon dioxide.
  • examples of such other fillers are metal oxides, such as titanium dioxide, ferric oxide, aluminum oxide and zinc oxide, provided that they each have a surface area of at least 50 m 2 / g.
  • non-reinforcing fillers that is to say fillers with a surface area of less than 50 ml / g
  • quartz powder diatomaceous earth, pebble chalk, Neuburg chalk, calcium silicate, zirconium silicate, calcium carbonate, for example in the form of ground chalk, and calcined aluminum silicate and powdered sodium aluminum silicate with molecular sieve properties.
  • the reinforcing and the non-reinforcing fillers can be made hydrophobic, for example by treatment with trimethylethoxysilane or stearic acid. If desired, such treatment may have been carried out, for example, in a ball mill.
  • Fibrous fillers such as asbestos and glass fibers, in particular those with an average length of at most 0.5 mm, and / or organic fibers can also be used.
  • compositions according to the invention all constituents of the particular composition can be mixed together in any order. This mixing is expediently carried out at room temperature and with the exclusion of water. If desired, this mixing can also take place at higher temperatures, e.g. at a temperature in the range of 35 ° C to 150 ° C.
  • the normal water content of the air is sufficient for the crosslinking of the compositions according to the invention. If desired, however, the crosslinking can also be carried out at temperatures higher than room temperature or lower temperatures than room temperature, e.g. at 5 ° to 10 ° C, and / or by means of concentrations of water exceeding the normal water content of the air.
  • compositions according to the invention adhere to these substrates very good even without the use of the usual primers.
  • substrates such as glass, porcelain, earthenware, mortar, aluminum, brass, stainless steel, galvanized sheet metal, wood, paper or plastics, such as polyvinyl chloride, polyester, polystyrene or polymethyl methacrylate, adhere to these substrates very good even without the use of the usual primers.
  • the compositions according to the invention are therefore not only suitable for sealing joints, including vertically running joints, and similar empty spaces with clear widths of, for example 1 mm to 50 mm, for example of land, water or aircraft as well as of buildings, including those made of lightweight building blocks or prefabricated components.
  • compositions of the invention are also excellent as adhesives or putties, as well as for producing electrical conductor insulations and for producing coatings on a wide variety of substrates, such as the adhesive-repellent finishing of paper and other coatings, such as those of metals, artificial and natural stones or non-woven textiles.
  • Example 2 The procedure described in Example 1 is repeated with the modification that 2 parts of an organosilicon compound are used as the organosilicon compound with amino groups bonded to silicon via carbon and siloxane oxygen atoms, which are obtained by reaction of the silane of the formula with a dimethylpolysiloxane each having an Si-bonded hydroxyl group in the terminal units, the amount of Si-bonded hydroxyl groups being 3.7%.
  • this organosilicon compound consisted of 0.6 mol percent Si-bonded C 2 H 5 O groups, 95.4% dimethylsiloxane units and 4 mol percent groupings of the formula
  • Example 1 The procedure described in Example 1 is repeated with the modification that no organosilicon compound with amino groups bonded to silicon via carbon and siloxane oxygen atoms is used.
  • Example 3 The procedure described in Example 3 is repeated with the modification that no organosilicon compound with amino groups bonded to silicon via carbon and siloxane oxygen atoms is used.
  • the masses prepared according to Examples 1 to 3 and also the masses prepared according to Comparative Experiment V 1 and V 2 can be stored in the absence of water and cure to give elastomers under the action of the water vapor contained in the air.
  • Example 3 The procedure described in Example 3 is repeated with the modification that 2 parts of the silane of the formula instead of the 2 parts of the organosilicon compound described in Example 1 with amino groups bonded to silicon via carbon and siloxane oxygen atoms.
  • the mass produced in this way can be stored in the absence of water. However, under the influence of the water vapor contained in the air, the mass only forms a skin on the surface and does not harden into an elastomer.
  • compositions according to the invention would cure even in the absence of a condensation catalyst, because the organosilicon compounds (3) used according to the invention, the organosilicon compounds used according to DE-OS 19 64 502 with an amino group bonded via carbon to silicon, essentially only by the additional Distinguish the presence of siloxane oxygen.

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Description

Aus US-PS 36 78 003, W. Kaiser et al., assignor to Wacker-Chemie GmbH, ausgegeben: 18. Juli 1972, wobei diese US-PS der FR-PS 20 74 144 entspricht, sind bereits unter Ausschluß von Wasser lagerfähige, bei Zutritt von Wasser bei Raumtemperatur zu Elastomeren vernetzende Massen aus (1) kondensationsfähige Endgruppen aufweisendem Diorganopolysiloxan, (2) insgesamt mindestens drei über Stickstoff an Silicium gebundene Aminogruppen und/oder über Sauerstoff an Silicium gebundene Oximgruppen je Molekül aufweisender Siliciumverbindung und mindestens einem weiteren Bestandteil (3), der zur Verbesserung der Haftfestigkeit der aus diesen Massen auf Unterlagen erzeugten Elastomeren auf diesen Unterlagen dient und aus mindestens einer Organosiliciumverbindung mit mindestens einer über Kohlenstoff an Silicium gebundener Aminogruppe besteht, bekannt. Bei diesen Massen ist der Bestandteil (3) mindestens ein Silan, also eine monomere Siliciumverbindung, wobei dieses Silan zusätzlich zu mindestens einer über Kohlenstoff an Silicium gebundener Aminogruppe mindestens einen über Sauerstoff an Silicium gebundenen, einwertigen, gegebenenfalls durch eine Amino- oder Alkoxygruppe substituierten Kohlenwasserstoffrest enthält. Gegenüber diesen bekannten Massen haben die erfindungsgemäßen Massen insbesondere den Vorteil, daß sie auch in dickeren Schichten vollständig vernetzen. Die vollständige Vernetzung der erfindungsgemäßen Massen erfolgt in dickeren Schichten auch dann, wenn sie keine Kondensationskatalysatoren, wie Dibutylzinndilaurat, enthalten.From US-PS 36 78 003, W. Kaiser et al., Assignor to Wacker-Chemie GmbH, issued: July 18, 1972, this US-PS corresponds to FR-PS 20 74 144, are storable even in the absence of water , when water enters at room temperature to give elastomers which crosslink to elastomers from (1) diorganopolysiloxane having condensable end groups, (2) a total of at least three amino groups bonded to silicon via nitrogen and / or oxime groups bonded to silicon via oxygen per silicon compound and at least one further constituent (3), which serves to improve the adhesive strength of the elastomers produced from these compositions on supports and consists of at least one organosilicon compound with at least one amino group bonded to silicon via carbon, is known. In these compositions, constituent (3) is at least one silane, that is to say a monomeric silicon compound, this silane, in addition to at least one amino group bonded to silicon via carbon, at least one monovalent hydrocarbon radical which is bonded to silicon via oxygen and is optionally substituted by an amino or alkoxy group contains. Compared to these known compositions, the compositions according to the invention have the particular advantage that they crosslink completely even in thicker layers. The compositions according to the invention are completely crosslinked in thicker layers even if they do not contain any condensation catalysts, such as dibutyltin dilaurate.

Gegenstand der Erfindung sind unter Ausschluß von Wasser lagerfähige, bei Zutritt von Wasser bei Raumtemperatur zu Elastomeren vernetzende Massen aus (1) kondensationsfähige Endgruppen aufweisendem Diorganopolysiloxan, (2) insgesamt mindestens drei über Stickstoff an Silicium gebundene Aminogruppen und/oder über Sauerstoff an Silicium gebundene Oximgruppen je Molekül aufweisender Siliciumverbindung und mindestens einer (3) Organosiliciumverbindung mit mindestens einer über Kohlenstoff an Silicium gebundenen Aminogruppe als mindestens einem weiteren Bestandteil, dadurch gekennzeichnet, daß mindestens ein Teil von Organosiliciumverbindung (3) mindestens ein Siloxansauerstoffatom enthält und in Mengen von 0,1 bis 20 Gewichtsprozent, bezogen auf das Gesamtgewicht der Masse, enthalten ist.The invention relates to the exclusion of water-storable masses of (1) diorganopolysiloxane having end groups capable of condensation when water is admitted at room temperature, (2) a total of at least three amino groups bonded to silicon via nitrogen and / or oxime groups bonded to silicon via oxygen per molecule of silicon compound and at least one (3) organosilicon compound with at least one amino group bonded to silicon via carbon as at least one further constituent, characterized in that at least part of organosilicon compound (3) contains at least one siloxane oxygen atom and in amounts of 0.1 to 20 percent by weight, based on the total weight of the mass, is included.

Die erfindungsgemäßen Massen können aus den gleichen, kondensationsfähige Endgruppen aufweisenden Diorganopolysiloxanen (1) bereitet werden, aus denen auch die bisher bekannten, unter Ausschluß von Wasser lagerfähigen, bei Zutritt von Wasser bei Raumtemperatur zu Elastomeren vernetzenden Massen aus kondensationsfähige Endgruppen aufweisendem Diorganopolysiloxan und insgesamt mindestens drei über Stickstoff an Silicium gebundene Aminogruppen und/oder über Sauerstoff an Silicium gebundene Oximgruppen je Molekül aufweisender Siliciumverbindung bereitet werden konnten. Die zur Herstellung solcher Massen meist verwendeten und auch im Rahmen der Erfindung bevorzugt eingesetzten kondensationsfähige Endgruppen aufweisenden Diorganopolysiloxane (1) können z.B. durch die allgemeine Formel

Figure imgb0001
wiedergegeben werden. In dieser Formel bedeutet R3 gleiche oder verschiedene, einwertige, gegebenenfalls substituierte und/oder polymere Kohlenwasserstoffreste und x ist eine ganze Zahl im Wert von mindestens 10. Innerhalb der bzw. entlang den Siloxanketten der vorstehend angegebenen Formel können, was bei 'derartigen Formeln üblicherweise nicht dargestellt wird, zusätzlich zu den Diorganosiloxaneinheiten (SiR30) noch andere Siloxaneinheiten vorliegen. Beispiele für solche anderen, meist lediglich als Verunreinigungen vorliegenden Siloxaneinheiten sind solche der Formeln R3SiO3/2, R3 3SiO1/2 und Si04,z, wobei R3 jeweils die oben dafür angegebene Bedeutung hat. Die Menge an solchen anderen Siloxaneinheiten als Diorganosiloxaneinheiten beträgt jedoch vorzugsweise höchstens 10 Molprozent, insbesondere höchstens 1 Molprozent, jeweils bezogen auf das Gewicht der Diorganopolysiloxane (1). Die Hydroxylgruppen in der oben angegebenen Formel der kondensationsfähige Endgruppen aufweisenden Diorganopolysiloxane können, falls erwünscht, vollständig oder teilweise durch andere kondensationsfähige Gruppen als Si-gebundene Hydroxylgruppen ersetzt sein. Beispiele für solche anderen kondensationsfähige Gruppen sind insbesondere über Stickstoff an Silicium gebundene Aminogruppen, wie sie weiter unten näher erläutert werden, über Sauerstoff an Silicium ge- bundene Oximgruppen, wie sie ebenfalls weiter unten näher erläutert werden, Alkoxygruppen mit 1 bis 5 Kohlenstoffatomen und Alkoxyalkylenoxygruppen mit 1 bis 5 Kohlenstoffatomen, wie der Rest der Formel CH30CHZCHzO-.The compositions according to the invention can be prepared from the same diorganopolysiloxanes (1) which have end groups capable of condensation and from which the hitherto known compositions of diorganopolysiloxane which have condensable end groups and which crosslink under the exclusion of water and which adhere to water when exposed to water at room temperature, and a total of at least three amino groups bonded to silicon via nitrogen and / or oxime groups bonded to silicon via oxygen could be prepared per silicon compound having a molecule. The diorganopolysiloxanes (1) which are mostly used for the production of such compositions and which are also preferably used in the context of the invention have diorganopolysiloxanes (1) by the general formula
Figure imgb0001
 are reproduced. In this formula, R 3 means identical or different, monovalent, optionally substituted and / or polymeric hydrocarbon radicals and x is an integer with a value of at least 10. Within or along the siloxane chains of the formula given above, what can be done with such formulas not shown, there are other siloxane units in addition to the diorganosiloxane units (SiR30). Examples of such other siloxane units, which are usually only present as impurities, are those of the formulas R 3 SiO 3/2 , R 3 3 SiO 1/2 and Si0 4 , z , where R 3 has the meaning given above for each. However, the amount of such siloxane units as diorganosiloxane units is preferably at most 10 mol percent, in particular at most 1 mol percent, in each case based on the weight of the diorganopolysiloxanes (1). The hydroxyl groups in the above-mentioned diorganopolysiloxane group having condensable end groups can, if desired, be completely or partially replaced by condensable groups other than Si-bonded hydroxyl groups. Examples of such other groups capable of condensation are connected in particular via nitrogen to silicon bonded amino groups, as will be explained in more detail below, through oxygen to silicon-bonded oxime groups, as will also be discussed in more detail below, alkoxy groups having 1 to 5 carbon atoms and Alkoxyalkylenoxygruppen 1 to 5 carbon atoms, like the rest of the formula CH 3 0CH Z CH z O-.

Beispiele für Kohlenwasserstoffreste R3 sind Alkylreste, wie der Methyl-, Äthyl-, n-Propyl- und Isopropylrest sowie Octadecylreste; Alkenylreste, wie der Vinyl- und Allylrest; cycloaliphatische Kohlenwasserstoffreste, wie der Cyclopentyl- und Cyclohexylrest sowie Methylcyclohexyl- und Cyclohexenylreste; Arylreste, wie der Phenylreste und Xenylreste; Aralkylreste, wie der Benzyl-, beta-Phenyläthyl- und der beta-Phenylpropylrest; sowie Alkarylreste, wie Tolylreste.Examples of hydrocarbon radicals R 3 are alkyl radicals, such as the methyl, ethyl, n-propyl and isopropyl radical and octadecyl radicals; Alkenyl groups such as the vinyl and allyl groups; cycloaliphatic hydrocarbon radicals, such as the cyclopentyl and cyclohexyl radical and methylcyclohexyl and cyclohexenyl radicals; Aryl groups such as phenyl groups and xenyl groups; Aralkyl radicals, such as the benzyl, beta-phenylethyl and beta-phenylpropyl radicals; and alkaryl radicals, such as tolyl radicals.

Als substituierte Kohlenwasserstoffreste R3 sind Halogenarylreste, wie Chlorphenyl- und Bromphenylreste; und Cyanalkylreste, wie der beta-Cyanäthylrest, bevorzugt.Substituted hydrocarbon radicals R 3 are haloaryl radicals, such as chlorophenyl and bromophenyl radicals; and cyanalkyl radicals, such as the beta-cyanoethyl radical, are preferred.

Beispiele für substituierte polymere und unsubstituierte polymere Kohlenwasserstoffreste R3, wobei solche polymeren Kohlenwasserstoffreste auch als modifizierende Kohlenwasserstoffreste bezeichnet werden können, sind insbesondere solche, die bei einer Polymerisation von polymerisierbaren Verbindungen mittels freier Radikale in Gegenwart von Diorganopolysiloxanen der allgemeinen Formel

Figure imgb0002
worin x die oben dafür angegebene Bedeutung hat und R gleiche oder verschiedene, einwertige, gegebenenfalls substituierte Kohlenwasserstoffreste bedeutet, gebildet werden. Beispiele für polymerisierbare Verbindungen, die bei einer derartigen, in Gegenwart von Diorganopolysiloxan durchgeführten Polymerisation eingesetzt werden können, sind Vinylacetat, Äthylen, Styrol, Acrylsäure, Methacrylsäure, Acrylsäureester, wie n-Butylacrylat, Methacrylsäureester, wie n-Butylmethacrylat, Acrylnitril und Methacrylnitril, sowie Gemische aus mindestens zwei der genannten Monomeren, wie Gemische aus Vinylacetat und Äthylen.Examples of substituted polymeric and unsubstituted polymeric hydrocarbon radicals R 3 , where such polymeric hydrocarbon radicals can also be referred to as modifying hydrocarbon radicals are, in particular, those which, when polymerizable compounds are polymerized by means of free radicals in the presence of diorganopolysiloxanes of the general formula
Figure imgb0002
 where x has the meaning given above and R is the same or different, monovalent, optionally substituted hydrocarbon radicals are formed. Examples of polymerizable compounds which can be used in such a polymerization carried out in the presence of diorganopolysiloxane are vinyl acetate, ethylene, styrene, acrylic acid, methacrylic acid, acrylic acid esters such as n-butyl acrylate, methacrylic acid esters such as n-butyl methacrylate, acrylonitrile and methacrylonitrile, and Mixtures of at least two of the monomers mentioned, such as mixtures of vinyl acetate and ethylene.

Insbesondere wegen der leichten Zugänglichkeit sind vorzugsweise mindestens 50% der Anzahl der SiC-gebundenen Reste im Diorganopolysiloxan (1) und damit der Reste R3 in den oben angegebenen Formeln Methylreste.In particular because of the easy accessibility, at least 50% of the number of SiC-bonded residues in diorganopolysiloxane (1) and thus the residues R 3 in the formulas given above are preferably methyl residues.

Bei den kondensationsfähige Endgruppen aufweisenden Diorganopolysiloxanen (1) kann es sich um Homo- oder Mischpolymerisate handeln. Es können Gemische aus verschiedenen, kondensationsfähige Endgruppen aufweisenden Diorganopolysiloxanen verwendet werden.The diorganopolysiloxanes (1) which have condensable end groups can be homopolymers or copolymers. Mixtures of different diorganopolysiloxanes with condensable end groups can be used.

Die Viskosität der kondensationsfähige Endgruppen aufweisenden Diorganopolysiloxane beträgt zweckmäßig 100 bis 500000 mPa.s bei 25°C.The viscosity of the diorganopolysiloxanes having condensable end groups is advantageously 100 to 500,000 mPa.s at 25 ° C.

Bei der Bereitung der erfindungsgemäßen Massen können als insgesamt mindestens drei über Stickstoff an Silicium gebundene Aminogruppen und/oder über Sauerstoff an Silicium gebundene Oximgruppen je Molekül aufweisende Siliciumverbindungen (2) ebenfalls die gleichen Siliciumverbindungen mit insgesamt mindestens drei über Stickstoff an Silicium gebundenen Aminogruppen und/oder über Sauerstoff an Silicium gebundenen Oximgruppen je Molekül verwendet werden, die auch bisher zur Herstellung von unter Ausschluß von Wasser lagerfähigen, bei Zutritt von Wasser bei Raumtemperatur zu Elastomeren vernetzenden Massen durch Vermischen einer derartigen Siliciumverbindung mit kondensationsfähige Endgruppen aufweisendem Diorganopolysiloxan verwendet werden konnten.When preparing the compositions according to the invention, a total of at least three amino groups bonded to silicon via nitrogen and / or oxime groups bonded via silicon to oxygen per molecule can also contain the same silicon compounds with a total of at least three amino groups bonded to silicon via nitrogen and / or Oxime groups bonded to silicon via oxygen are used per molecule, which have also been used hitherto for the preparation of compositions which can be stored in the absence of water and which crosslink to form elastomers when water is admitted at room temperature by mixing such a silicon compound with diorganopolysiloxane having condensable end groups.

Beispiele für im Rahmen der Erfindung verwendbare Siliciumverbindungen (2) sind somit Aminosilane der allgemeinen Formel

Figure imgb0003
worin R die oben dafür angegebene Bedeutung hat, R1 Wasserstoff oder ein einwertiger, gegebenenfalls substituierter Kohlenwasserstoffrest und a 0 oder 1 ist, und deren höchstens 10 Siliciumatome je Molekül aufweisende Teilhydrolysate.Examples of silicon compounds (2) which can be used in the context of the invention are thus aminosilanes of the general formula
Figure imgb0003
 wherein R has the meaning given above for it, R 1 is hydrogen or a monovalent, optionally substituted hydrocarbon radical and a is 0 or 1, and their partial hydrolysates containing at most 10 silicon atoms per molecule.

Die oben angegebenen Beispiele für substituierte und unsubstituierte Kohlenwasserstoffreste R gelten mit Ausnahme das Vinylrests im vollen Umfang auch für die substituierten und unsubstituierten Kohlenwasserstoffreste R1. Weitere Beispiele für Kohlenwasserstoffreste R1 sind der n-Butyl-, sec.-Butyl- und der tert.-Butylrest. Bevorzugt als Reste R1 sind der sec.-Butyl- und der Cyclohexylrest.The examples given above for substituted and unsubstituted hydrocarbon radicals R, with the exception of the vinyl radical, also apply in full to the substituted and unsubstituted hydrocarbon radicals R 1 . Further examples of hydrocarbon radicals R 1 are the n-butyl, sec-butyl and the tert-butyl radical. Preferred radicals R 1 are the sec-butyl and the cyclohexyl radical.

Weitere Beispiele für Siliciumverbindungen (2) sind Oximsilane der allgemeinen Formel

Figure imgb0004
worin R und a jeweils die oben dafür angegebene Bedeutung haben und X eine R'RC=Gruppe (R und R1 haben jeweils die oben dafür angegebene Bedeutung) oder R4C=Gruppe (R4 bedeutet einen zweiwertigen, gegebenenfalls substituierten Kohlenwasserstoffrest) ist, und deren höchstens 10 Siliciumatome je Molekül aufweisende Teilhydrolysate.Further examples of silicon compounds (2) are oxime silanes of the general formula
Figure imgb0004
 wherein R and a each have the meaning given above and X is an R'RC = group (R and R 1 each have the meaning given above) or R 4 C = group (R 4 means a divalent, optionally substituted hydrocarbon radical) , and their partial hydrolyzates containing at most 10 silicon atoms per molecule.

Schließlich sind Beispiele für Siliciumverbindungen (2) auch Silane der allgemeinen Formel

Figure imgb0005
worin R, R' und X jeweils die oben dafür angegebene Bedeutung haben und c durchschnittlich mindestens 0,1, vorzugsweise mindestens 0,5 und höchstens 2,9 ist, wobei die Summe aus a + c höchstens 3 ist.Finally, examples of silicon compounds (2) are also silanes of the general formula
Figure imgb0005
 wherein R, R 'and X each have the meaning given above and c is on average at least 0.1, preferably at least 0.5 and at most 2.9, the sum of a + c being at most 3.

Einzelne Beispiele für Siliciumverbindungen (2) sind Methyltris-(n-butylamino)-silan, Methyltris-(sec.-butylamino)-silan, Methyltris-(cyclohexylamino)-silan, Methyltris-(methyläthylketoxirn)-silan, Methylbis-(methyläthylketoxim)-cyclohexylaminosilan und Methyltris-(acetonoxim)-silan.Individual examples of silicon compounds (2) are methyltris (n-butylamino) silane, methyltris (sec.butylamino) silane, methyltris (cyclohexylamino) silane, methyltris (methylethylketoxirn) silane, methylbis (methylethylketoxime) -cyclohexylaminosilane and methyltris (acetone oxime) -silane.

Es können Gemische aus verschiedenen Siliciumverbindungen (2), z.B. ein Gemisch aus 1 Mol Methyltris-(cyclohexylamino)-silan und 2 Mol Methyltris-(methyläthylketoxim)-silan, verwendet werden.Mixtures of different silicon compounds (2), e.g. a mixture of 1 mol of methyl tris (cyclohexylamino) silane and 2 mol of methyl tris (methyl ethyl ketoxime) silane can be used.

Die insgesamt mindestens drei über Stickstoff an Silicium gebundene Aminogruppen und/oder über Sauerstoff an Silicium gebundene Oximgruppen je Molekül aufweisende Siliciumverbindung (2) wird vorzugsweise in solchen Mengen verwendet, daß insgesamt mindestens drei über Stickstoff an Silicium gebundene Aminogruppen und/oder über Sauerstoff an Silicium gebundene Oximgruppen je kondensationsfähige Endgruppe im Diorganopolysiloxan (1) vorliegen. In der Praxis werden häufig 0,2 bis 15 Gewichtsprozent, meist 1 bis 8 Gewichsprozent, jeweils bezogen auf das Gesamtgewicht der jeweiligen Masse, an Siliciumverbindung (2) eingesetzt.The total of at least three amino groups per molecule bonded to silicon via nitrogen and / or oxime groups bonded to silicon via oxygen (2) is preferably used in amounts such that there are a total of at least three amino groups bonded to silicon via nitrogen and / or oxime groups bonded to silicon via oxygen per end group capable of condensation in the diorganopolysiloxane (1). In practice, 0.2 to 15 percent by weight, usually 1 to 8 percent by weight, based in each case on the total weight of the particular mass, of silicon compound (2) is used.

Als Organosiliciumverbindung (3) mit mindestens einer über Kohlenstoff an Silicium gebundener Aminogruppe und mindestens einem Siloxansauerstoffatom können z.B. auch Verbindungen der allgemeinen Formel

Figure imgb0006
worin R und a jeweils die oben dafür angegebene Bedeutung haben, eingesetzt werden. Insbesondere wegen der leichten Zugänglichkeit sind jedoch als Organosiliciumverbindungen (3) solche der allgemeinen Formel
Figure imgb0007
bevorzugt. In dieser Formel hat R die oben dafür angegebene Bedeutung, A bedeutet gleiche oder verschiedene Reste der Formel
Figure imgb0008
wobei R1 und a jeweils die oben dafür angegebene Bedeutung haben, Q Sauerstoff oder die Gruppierung -NR' und p eine ganze Zahl im Wert von 1 bis 10 ist, Y gleiche oder verschiedene Reste der Formel
Figure imgb0009
wobei A, R und a jeweils die oben angegebene Bedeutung haben, RI Wasserstoff oder gleiche oder verschiedene, gegebenenfalls durch mindestens ein Äthersauerstoffatom unterbrochene, einwertige Kohlenwasserstoffreste, b O, 1, 2 oder 3 und die Summe von a + b höchstens 3 ist, m 0 oder eine ganze Zahl im Wert von 1 bis 2 000 und n O oder eine ganze Zahl im Wert von 1 bis 1 000 bedeutet, mit der Maßgabe, daß mindestens ein Rest A je Organopolysiloxan (3) vorliegt.As organosilicon compound (3) with at least one amino group bonded to silicon via carbon and at least one siloxane oxygen atom, it is also possible, for example, to use compounds of the general formula
Figure imgb0006
 where R and a each have the meaning given above, are used. Particularly because of the easy accessibility, organosilicon compounds (3) are those of the general formula
Figure imgb0007
 prefers. In this formula, R has the meaning given above for it, A means identical or different radicals of the formula
Figure imgb0008
 where R 1 and a each have the meaning given above, Q is oxygen or the grouping -NR 'and p is an integer from 1 to 10, Y are identical or different radicals of the formula
Figure imgb0009
 where A, R and a each have the meaning given above, R I is hydrogen or the same or different monovalent hydrocarbon radicals which are optionally interrupted by at least one ether oxygen atom, b O, 1, 2 or 3 and the sum of a + b is at most 3, m means 0 or an integer from 1 to 2,000 and n O or an integer from 1 to 1,000, with the proviso that at least one radical A is present per organopolysiloxane (3).

Vorzugsweise ist R auch in der Organosiliciumverbindung (3) der Methylrest.R is also preferably the methyl radical in the organosilicon compound (3).

Bevorzugte Beispiele für Reste A sind solche der folgenden Formeln:

Figure imgb0010
Figure imgb0011
Figure imgb0012
Figure imgb0013
Figure imgb0014
 Preferred examples of radicals A are those of the following formulas:
Figure imgb0010
Figure imgb0011
Figure imgb0012
Figure imgb0013
Figure imgb0014

Wie aus den vorstehenden Formeln ersichtlich, bedeutet R1 in der Gruppierung A vorzugsweise Wasserstoff. R1 muß aber nicht immer Wasserstoff sein, wie durch die Gruppierung

Figure imgb0015
veranschaulicht sei. Wie weiterhin aus den vorstehenden Formeln ersichtlich, können die Werte p in ein und derselben Gruppierung A und damit auch in verschiedenen Gruppierungen A gleich oder verschieden sein.As can be seen from the above formulas, R 1 in group A preferably denotes hydrogen. However, R 1 does not always have to be hydrogen, as is the case with the grouping
Figure imgb0015
 is illustrated. As can also be seen from the above formulas, the values p in one and the same grouping A and thus also in different groupings A can be the same or different.

Grundsätzlich sind als Reste A solche der allgemeinen Formel

Figure imgb0016
worin Q die oben dafür angegebene Bedeutung hat, bevorzugt.Basically, radicals A are those of the general formula
Figure imgb0016
 where Q has the meaning given above, preferred.

Vorzugsweise haben die Reste R2 1 bis 18 Kohlenstoffatome, wobei jedoch der Methyl- und der Äthylrest besonders bevorzugt sind. Das wichtigste Beispiel für einen durch ein Äthersauerstoffatom unterbrochenen Kohlenwasserstoffrest R2 ist der Methoxyäthylenrest.The radicals R 2 preferably have 1 to 18 carbon atoms, but the methyl and ethyl radicals are particularly preferred. The most important example of a hydrocarbon radical R 2 interrupted by an ether oxygen atom is the methoxyethylene radical.

Vorzugsweise ist m eine ganze Zahl im Wert von 3 bis 1 000. Weiterhin ist bevorzugt, daß in den Verbindungen der allgemeinen formel Y(OSiR2)m(OSiAR)nOY höchstens 100 Einheiten der Formel RzSiO je Gruppierung a vorliegen.M is preferably an integer from 3 to 1,000. It is further preferred that in the compounds of the general formula Y (OSiR 2 ) m (OSiAR) n OY at most 100 units of the formula R z SiO there are a for each grouping.

Beispiele für Organosiliciumverbindungen (3) der bevorzugten Art sind solche der allgemeinen Formel

Figure imgb0017
wobei R, A und n jeweils die oben dafür angegebene Bedeutung haben und m' eine ganze Zahl im Wert von mindestens 3 ist. Die Herstellung solcher Organopolysiloxane ist bekannt, z.B. aus FR-PS 11 84 097, veröffentlicht: 16. Juli 1959, Anmelder: Union Carbide Corporation, und FR-PS 12 97 045, veröffentlicht durch "Bulletin officiel de la Propriete industrielle" Nr. 25 von 1962, Anmelder: Union Carbide Corporation.Examples of organosilicon compounds (3) of the preferred type are those of the general formula
Figure imgb0017
 where R, A and n each have the meaning given above and m 'is an integer with a value of at least 3. The preparation of such organopolysiloxanes is known, for example from FR-PS 11 84 097, published: July 16, 1959, applicant: Union Carbide Corporation, and FR-PS 12 97 045, published by "Bulletin officiel de la Propriete industrial" No. 25 1962, applicant: Union Carbide Corporation.

Weitere Beispiele für Organosiliciumverbindungen (3) der bevorzugten Art sind solche der allgemeinen Formel

Figure imgb0018
wobei R, R2, A, m' und n jeweils die oben angegebene Bedeutung haben. Solche Organopolysiloxane können z.B. durch Umsetzung von mindestens einer Verbindung der allgemeinen Formel
Figure imgb0019
wobei A, R und R2 jeweils die oben dafür angegebene Bedeutung haben, mit mindestens einem Organopolysiloxan der allgemeinen Formel
Figure imgb0020
wobei R und m' jeweils die oben dafür angegebene Bedeutung haben, gegebenenfalls in Gegenwart eines Kondensationskatalysators, wie Natriumhydroxyd oder Dibutylzinndilaurat, unter Abspaltung einer Verbindung der allgemeinen Formel
Figure imgb0021
hergestellt werden.Further examples of organosilicon compounds (3) of the preferred type are those of the general formula
Figure imgb0018
 where R, R 2 , A, m 'and n each have the meaning given above. Such organopolysiloxanes can, for example, by reacting at least one compound of the general formula
Figure imgb0019
 where A, R and R 2 each have the meaning given above, with at least one organopolysiloxane of the general formula
Figure imgb0020
 where R and m 'each have the meaning given above, optionally in the presence of a condensation catalyst, such as sodium hydroxide or dibutyltin dilaurate, with elimination of a compound of the general formula
Figure imgb0021
 getting produced.

Beispiele für Organosiliciumverbindungen (3) der bevorzugten Art sind weiterhin solche der allgemeinen Formel

Figure imgb0022
worin R, R2, A, b, m' und n jeweils die oben dafür angegebene Bedeutung haben, mit der Maßgabe, daß mindestens eine Gruppierung A je Molekül vorliegt. Auch die Herstellung solcher Organopolysiloxane ist bekannt, z.B. aus DE-OS 23 39 761 , offengelegt: 21. Februar 1974, Anmelder: Stauffer Chemical Co., und FR-PS 12 94 235, veröffentlicht durch "Bulletin officiel de la Propriete industrielle Nr. 21 von 1962, Anmelder: Dow Corning Corporation.Examples of organosilicon compounds (3) of the preferred type are also those of the general formula
Figure imgb0022
 wherein R, R 2 , A, b, m 'and n each have the meaning given above, with the proviso that there is at least one group A per molecule. The preparation of such organopolysiloxanes is also known, for example from DE-OS 23 39 761, published February 21, 1974, applicant: Stauffer Chemical Co., and FR-PS 12 94 235, published by "Bulletin officiel de la Propriete industrial no. 21 of 1962, applicant: Dow Corning Corporation.

Selbstverständlich können auch innerhalb der bzw. entlang den Siloxanketten der oben angegebenen Formeln für Organosiliciumverbindungen (3) zusätzlich zu den Diorganosiloxaneinheiten SiR20 und SiARO noch andere Siloxaneinheiten vorliegen. Beispiele für solche anderen Siloxaneinheiten sind solche der Formeln RSi03,2, R3SiO1/2 und Si0"2, wobei R jeweils die oben dafür angegebene Bedeutung hat. Die Mengen an solchen anderen Siloxaneinheiten als Diorganosiloxaneinheiten beträgt auch in den Organosiliciumverbindungen (3) vorzugsweiss höchstens 10 Molprozent.Of course, in addition to the diorganosiloxane units SiR 2 O and SiARO, other siloxane units can also be present within or along the siloxane chains of the formulas given above for organosilicon compounds (3). Examples of such other siloxane units are those of the formulas RSi0 3 , 2 , R 3 SiO 1/2 and Si0 "2, where R in each case has the meaning given above. The amounts of such siloxane units as diorganosiloxane units are also in the organosilicon compounds (3 ) preferably at most 10 mole percent.

Die Organosiliciumverbindungen (3) werden in Mengen von 0,1 bis 20 Gewichtsprozent, insbesondere 0,1 bis 5 Gewichtsprozent, jeweils bezogen auf das Gesamtgewicht der Masse, eingesetzt.The organosilicon compounds (3) are used in amounts of 0.1 to 20 percent by weight, in particular 0.1 to 5 percent by weight, in each case based on the total weight of the composition.

Zusätzlich zu kondensationsfähige Endgruppen aufweisendem Diorganopolysiloxan (1), insgesamt mindestens drei über Stickstoff an Silicium gebundene Aminogruppen und/oder über Sauerstoff an Silicium gebundene Oximgruppen je Molekül aufweisender Siliciumverbindung (2) und Organosiliciumverbindung (3) mit mindestens einer über Kohlenstoff an Silicium gebundener Aminogruppe und mindestens einem Siloxansauerstoffatom können auch bei der Bereitung der erfindungsgemäßen Massen Stoffe mitverwendet werden, die auch bisher bei der Herstellung von unter Ausschluß von Wasser lagerfähigen, bei Zutritt von Wasser bei Raumtemperatur zu Elastomeren vernetzenden Massen aus den Siliciumverbindungen (1) und (2) mitverwendet werden konnten. Beispiele für solche zusätzlich mitverwendbaren Stoffe sind verstärkene Füllstoffe, nicht verstärkende Füllstoffe, Pigmente, lösliche Farbstoffe, Riechstoffe, Organopolysiloxanharze, einschließlich solcher aus (CH3)3SiO1/2 und SiO4/2― Einheiten, organische Harze, wie Polyvinylchloridpulver, Korrosionsinhibitoren, Oxidationsinhibitoren, Hitzestabilisatoren, Lösungsmittel, weitere Mittel zur Verbesserung der Haftung der aus den Massen hergestellten Elastomeren auf den Unterlagen, auf denen die Elastomeren erzeugt wurden, wie die Verbindung der Formel CH3Si[O(CH2)2NH2]2(CH2)3O(CH2)2NH2, Kondensationskatalkysatoren, wie Zinnsalze oder Organozinnsalze von Carbonsäuren, z.B. Dibutylzinndilaurat oder aliphatische basische Stickstoffverbindungen, z.B. 3-Äthoxypropylamin-1 oder n-Hexylamin, Weichmacher, wie bei Raumtemperatur flüssige, durch Trimethylsiloxygruppen endblockierte Dimethylpolysiloxane oder Phosphorsäureester, wie Trioleylphosphat, schließlich Polyglykole, die veräthert und/oder verestert sein können, einschließlich Organosiloxan-Oxyalkylen-Blockmischpolymerisaten.In addition to diorganopolysiloxane (1) having condensable end groups, a total of at least three amino groups bonded to silicon via nitrogen and / or oxime groups bonded to silicon via oxygen per silicon compound (2) and organosilicon compound (3) having at least one amino group bonded to silicon and carbon At least one siloxane oxygen atom can also be used in the preparation of the compositions according to the invention which have also been used up to now in the preparation of compositions from the silicon compounds (1) and (2) which can be stored in the absence of water and which crosslink to form elastomers when water enters at room temperature could. Examples of such additionally usable substances are reinforced fillers, non-reinforcing fillers, pigments, soluble dyes, fragrances, organopolysiloxane resins, including those made from (CH 3 ) 3 SiO 1/2 and SiO 4/2 units, organic resins, such as polyvinyl chloride powder, corrosion inhibitors , Oxidation inhibitors, heat stabilizers, solvents, other agents for improving the adhesion of the elastomers produced from the compositions to the substrates on which the elastomers were produced, such as the compound of the formula CH 3 Si [O (CH 2 ) 2 NH 2 ] 2 ( CH 2 ) 3 O (CH 2 ) 2 NH 2 , condensation catalysts, such as tin salts or organotin salts of carboxylic acids, for example dibutyltin dilaurate or aliphatic basic nitrogen compounds, for example 3-ethoxypropylamine-1 or n-hexylamine, plasticizers, such as dimethylpolysiloxanes or phosphoric acid esters which are end-blocked by trimethylsiloxy groups or phosphoric acid esters, such as trioleylphosphate or polyether glycols, and finally polyglycols can be, including organosiloxane-oxyalkylene block copolymers.

Beispiele für verstärkende Füllstoffe, also für Füllstoffe mit einer Oberfläche von mindestens 50 m2/g, sind insbesondere pyrogen erzeugte Siliciumdioxyde, unter Erhaltung der Struktur entwässerte Kieselsäure-Hydrogele und andere Arten von gefälltem Siliciumdioxyd mit einer Oberfläche von mindestens 50 ml/g. Falls erwünscht, können jedoch auch andere Füllstoffe mit einer Oberfläche von mindestens 50 m2/g anstelle der genannten Siliciumdioxydarten oder gemeinsam mit diesen Siliciumdioxydarten eingesetzt werden. Beispiele für solche anderen Füllstoffe sind Metalloxyde, wie Titandioxyd, Ferrioxyd, Aluminiumoxyd und Zinkoxyd, soweit sie jeweils eine Oberfläche von mindestens 50 m 2/g aufweisen.Examples of reinforcing fillers, that is to say fillers with a surface area of at least 50 m 2 / g, are, in particular, pyrogenically produced silicon dioxide, silica hydrogels dehydrated while maintaining the structure and other types of precipitated silicon dioxide with a surface area of at least 50 ml / g. If desired, however, other fillers with a surface area of at least 50 m 2 / g can be used instead of the named types of silicon dioxide or together with these types of silicon dioxide. Examples of such other fillers are metal oxides, such as titanium dioxide, ferric oxide, aluminum oxide and zinc oxide, provided that they each have a surface area of at least 50 m 2 / g.

Beispiele für nicht verstärkende Füllstoffe, also für Füllstoffe mit einer Oberfläche von weniger als 50 ml/g, sind bzw. können sein Quarzmehl, Diatomeenerde, Kieselkreide, Neuburger Kreide (englisch: Neuburg Chalk), Calciumsilikat, Zirkoniumsilikat, Calciumcarbonat, z.B. in Form von gemahlener Kreide, und calciniertes Aluminiumsilikat sowie pulverförmiges Natriumaluminiumsilikat mit Molekularsiebeigenschaften. Die verstärkenden und die nicht verstärkenden Füllstoffe können hydrophobiert sein, beispielsweise durch Behandlung mit Trimethyläthoxysilan oder Stearinsäure. Falls erwünscht, kann eine solche Behandlung z.B. in einer Kugelmühle durchgeführt worden sein.Examples of non-reinforcing fillers, that is to say fillers with a surface area of less than 50 ml / g, are quartz powder, diatomaceous earth, pebble chalk, Neuburg chalk, calcium silicate, zirconium silicate, calcium carbonate, for example in the form of ground chalk, and calcined aluminum silicate and powdered sodium aluminum silicate with molecular sieve properties. The reinforcing and the non-reinforcing fillers can be made hydrophobic, for example by treatment with trimethylethoxysilane or stearic acid. If desired, such treatment may have been carried out, for example, in a ball mill.

Auch faserige Füllstoffe, wie Asbeste und Glasfasern, insbesondere solche mit einer durchschnittlichen Länge von höchstens 0,5 mm, und/oder organische Fasern können mitverwendet werden.Fibrous fillers, such as asbestos and glass fibers, in particular those with an average length of at most 0.5 mm, and / or organic fibers can also be used.

Es können Gemische aus verschiedenen verstärkenden und/oder nicht verstärkenden Füllstoffen verwendet werden.Mixtures of various reinforcing and / or non-reinforcing fillers can be used.

Zur Bereitung der erfindungsgemäßen Massen können alle Bestandteile der jeweiligen Masse in beliebiger Reihenfolge miteinander vermischt werden. Dieses Vermischen erfolgt zweckmäßig bei Raumtemperatur und unter Ausschluß von Wasser. Falls erwünscht, kann dieses Vermischen aber auch bei höheren Temperaturen erfolgen, z.B. bei einer Temperatur im Bereich von 35°C bis 150°C.To prepare the compositions according to the invention, all constituents of the particular composition can be mixed together in any order. This mixing is expediently carried out at room temperature and with the exclusion of water. If desired, this mixing can also take place at higher temperatures, e.g. at a temperature in the range of 35 ° C to 150 ° C.

Für die Vernetzung der erfindungsgemäßen Massen reicht der normale Wassergehalt der Luft aus. Die Vernetzung kann, falls erwünscht, jedoch auch bei höheren Temperaturen als Raumtemperatur oder niedrigeren Temperaturen als Raumtemperatur, z.B. bei 5° bis 10°C, und/oder mittels den normalen Wassergehalt der Luft übersteigenden Konzentrationen von Wasser durcheführt werden.The normal water content of the air is sufficient for the crosslinking of the compositions according to the invention. If desired, however, the crosslinking can also be carried out at temperatures higher than room temperature or lower temperatures than room temperature, e.g. at 5 ° to 10 ° C, and / or by means of concentrations of water exceeding the normal water content of the air.

Die aus den erfindungsgemäßen Massen auf den verschiedensten Unterlagen, wie Glas, Porzellan, Steingut, Mörtel, Aluminium, Messing, rostfreiem Stahl, verzinktem Blech, Holz, Papier oder Kunstoffen, wie Polyvinylchlorid, Polyester, Polystyrol oder Polymethylmethacrylat, erzeugten Elastomeren haften auf diesen Unterlagen sehr gut auch ohne Mitverwendung der üblichen Grundiermittel, Die erfindungsgemäßen Massen eignen sich deshalb nicht nur zum Abdichten von Fugen, einschließlich senkrecht verlaufender Fugen, und ähnlichen Leerräumen mit lichten Weiten von z.B. 1 mm bis 50 mm, beispielsweise von Land-, Wasser- oder Luftfahrzeugen sowie von Gebäuden, einschließlich solcher aus Leichtbausteinen oder vorgefertigten Bauteilen. Die erfindungsgemäßen Massen eignen sich vielmehr auch auzgezeichnet als Klebstoffe oder Verkittungsmassen sowie zum Herstellen von Isolierungen elektrischer Leiter und zum Herstellen von Überzügen auf den veschiedensten Unterlagen, wie der klebstoffabweisenden Ausrüstung von Papier und anderen Beschichtungen, wie denjenigen von Metallen, Kunst- und Natursteinen, gewebten oder ungewebten Textilien.The elastomers produced from the compositions according to the invention on a wide variety of substrates, such as glass, porcelain, earthenware, mortar, aluminum, brass, stainless steel, galvanized sheet metal, wood, paper or plastics, such as polyvinyl chloride, polyester, polystyrene or polymethyl methacrylate, adhere to these substrates very good even without the use of the usual primers. The compositions according to the invention are therefore not only suitable for sealing joints, including vertically running joints, and similar empty spaces with clear widths of, for example 1 mm to 50 mm, for example of land, water or aircraft as well as of buildings, including those made of lightweight building blocks or prefabricated components. Rather, the compositions of the invention are also excellent as adhesives or putties, as well as for producing electrical conductor insulations and for producing coatings on a wide variety of substrates, such as the adhesive-repellent finishing of paper and other coatings, such as those of metals, artificial and natural stones or non-woven textiles.

In den folgenden Beispielen beziehen sich alle Angaben von Teilen und Prozentsätzen auf das Gewicht, soweit nichts anderes angegeben ist.In the following examples, all parts and percentages are by weight, unless stated otherwise.

Beispiel 1example 1

Ein Gemisch aus 30 Teilen eines durch Trimethylsiloxygruppen enblockierten Dimethylpolysiloxans mit einer Viskosität von 35 mPa.s bei 25°C, 22 Teilen eines in den endständigen Einheiten je eine Si-gebundene Hydroxylgruppe aufweisenden Dimethylpolysiloxans mit einer Viskosität von 20000 mPa.s bei 25°C und 36 Gewichtsteilen eines in den endständigen Einheiten je eine Si-gebundene Hydroxylgruppe aufweisenden Dimethylpolysiloxans mit einer Viskosität von 80 000 mPa.s bei 25°C wird mit 8,7 Teilen pyrogen in der Gasphase erzeugtem Siliciumdioxyd (englisch: fume silica) mit einer Oberfläche von 150 m2/g, 4,4 Teilen Methyltris-(cyclohexylamino)-silan und 2 Teilen einer Organosiliciumverbindung mit über Kohlenstoff an Silicium gebundenen Aminogruppen und Siloxansauerstoffatomen vermischt. Die letztgenannte Organosiliciumverbindung wurde durch Umsetzung des Silans der Formel

Figure imgb0023
mit einem in den endständigen Einheiten je eine Si-gebundene Hydroxylgruppe aufweisenden Dimethylpolysiloxan mit einer Viskosität von 80 mPa.s bei 25°C hergestellt. Sie bestand gemäß dem NMR-Spektrum aus 16,4 Molprozent Si-gebundenen CH30-Gruppen, 71 Molprozent Dimethylsiloxan-Einheiten und 12,6 Molprozent Gruppierungen der Formel
Figure imgb0024
 A mixture of 30 parts of a dimethylpolysiloxane blocked by trimethylsiloxy groups and having a viscosity of 35 mPa.s at 25 ° C, 22 parts of a dimethylpolysiloxane each having an Si-bonded hydroxyl group and having a viscosity of 20,000 mPa.s at 25 ° C in the terminal units and 36 parts by weight of a dimethylpolysiloxane each having an Si-bonded hydroxyl group and having a viscosity of 80,000 mPa.s at 25 ° C. in the terminal units is combined with 8.7 parts of fume silica with a surface which is pyrogenically produced in the gas phase of 150 m 2 / g, 4.4 parts of methyltris (cyclohexylamino) silane and 2 parts of an organosilicon compound mixed with amino groups bonded to silicon via carbon and siloxane oxygen atoms. The latter organosilicon compound was obtained by reacting the silane of the formula
Figure imgb0023
 with a dimethylpolysiloxane each having an Si-bonded hydroxyl group in the terminal units and having a viscosity of 80 mPa.s at 25 ° C. It consisted according to the NMR spectrum, of 16.4 mole percent Si-bonded CH 3 0-groups, 71 mole percent dimethylsiloxane Units and 12.6 mole percent groupings of the formula
Figure imgb0024

Beispiel 2Example 2

Die in Beispiel 1 beschriebene Arbeitsweise wird wiederholt mit der Abänderung, daß als Organosiliciumverbindung mit über Kohlenstoff an Silicium gebundenen Aminogruppen und Siloxansauerstoffatomen 2 Teile einer Organosilicumverbindung verwendet werden, die durch Umsetzung des Silans der Formel

Figure imgb0025
mit einem in den endständigen Einheiten je eine Si-gebunden Hydroxylgruppe aufweisenden Dimethylpolysiloxan, wobei die Menge der Si-gebundenen Hydroxylgruppen 3,7% betrug, hergestellt wurde. Diese Organosiliciumverbindung bestand gemäß dem NMR-Spektrum aus 0,6 Molprozent Si-gebundenen C2H5O-Gruppen, 95,4% Dimethylsiloxan-Einheiten und 4 Molprozent Gruppierungen der Formel
Figure imgb0026
 The procedure described in Example 1 is repeated with the modification that 2 parts of an organosilicon compound are used as the organosilicon compound with amino groups bonded to silicon via carbon and siloxane oxygen atoms, which are obtained by reaction of the silane of the formula
Figure imgb0025
 with a dimethylpolysiloxane each having an Si-bonded hydroxyl group in the terminal units, the amount of Si-bonded hydroxyl groups being 3.7%. According to the NMR spectrum, this organosilicon compound consisted of 0.6 mol percent Si-bonded C 2 H 5 O groups, 95.4% dimethylsiloxane units and 4 mol percent groupings of the formula
Figure imgb0026

Beispiel 3Example 3

Ein Gemisch aus 32,7 Teilen des in den endständigen Einheiten je eine Si-gebundene Hydroxylgruppe aufweisenden Dimethylpolysiloxans mit einer Viskosität von 80 000 mPa.s bei 25°C, 16,3 Teilen des in den endständigen Einheiten je eine Si-gebundene Hydroxylgruppe aufweisenden Dimethylpolysiloxans mit einer Viskosität von 20 000 mPa.s und 19,6 Teilen des durch Trimethylsiloxygruppen endblockierten Dimethylpolysiloxans mit einer Viskosität von 35 mPa·s bei 25°C wird mit 19,6 Teilen calciniertem Aluminiumsilikat, 6,5 Teilen pyrogen in der Gasphase erzeugtem Siliciumdioxyd mit einer Oberfläche von 150 mZ/g, 1 Teil pulverförmigem Natriumaluminiumsilikat mit Molekularsiebeigenschaften, 4,2 Teilen Methyltris-(cyclohexylamino)-silan und 2 Teilen der in Beispiel 1 beschriebenen Organosiliciumverbindung mit über Kohlenstoff an Silicium gebundenen Aminogruppen und Siloxansauerstoffatomen vermischt.A mixture of 32.7 parts of the dimethylpolysiloxane each having an Si-bonded hydroxyl group in the terminal units and having a viscosity of 80,000 mPa.s at 25 ° C., 16.3 parts of that having an Si-bonded hydroxyl group in the terminal units Dimethylpolysiloxane with a viscosity of 20,000 mPa.s and 19.6 parts of the dimethylpolysiloxane end-blocked by trimethylsiloxy groups with a viscosity of 35 mPa · s at 25 ° C. is produced with 19.6 parts of calcined aluminum silicate, 6.5 parts of pyrogen in the gas phase silicon dioxide having a surface area of 150 m Z / g, 1 part of powdered sodium aluminum silicate having molecular sieve, 4.2 parts methyltris (cyclohexylamino) silane and 2 parts of organosilicon compound described in example 1 with mixing to silicon via carbon-bonded amino groups and Siloxansauerstoffatomen.

Vergleichsversuch V1 Comparative experiment V 1

Die in Beispiel 1 beschriebene Arbeitsweise wird wiederholt mit der Abänderung, daß keine Organosiliciumverbindung mit über Kohlenstoff an Silicium gebundenen Aminogruppen und Siloxansauerstoffatomen mitverwendet wird.The procedure described in Example 1 is repeated with the modification that no organosilicon compound with amino groups bonded to silicon via carbon and siloxane oxygen atoms is used.

Vergleichsversuch V2 Comparative experiment V2

Die in Beispiel 3 beschriebene Arbeitsweise wird wiederholt mit der Abänderung, daß keine Organosiliciumverbindung mit über Kohlenstoff an Silicium gebundenen Aminogruppen und Siloxansauerstoffatomen mitverwendet wird.The procedure described in Example 3 is repeated with the modification that no organosilicon compound with amino groups bonded to silicon via carbon and siloxane oxygen atoms is used.

Die gemäß Beispiel 1 bis 3 und auch die gemäß Vergleichsversuch V1 und V2 hergestellten Massen sind unter Ausschluß von Wasser lagerfähig und härten unter der Einwirkung des in der Luft enthaltenen Wasserdampfs zu Elastomeren.The masses prepared according to Examples 1 to 3 and also the masses prepared according to Comparative Experiment V 1 and V 2 can be stored in the absence of water and cure to give elastomers under the action of the water vapor contained in the air.

Zur Bestimmung der Haftfestigkeit der Elastomeren auf Unterlagen werden je zwei Stücke der in der folgenden Tabelle angebenen Werkstoffe mittels der Massen miteinander verklebt und die so erhaltenen Verbundstoffe nach der methode ASA (American Standards Association) 116,1-1960 in einer Zerreißmaschine geprüft. Es werden folgende Ergebnisse erhalten:

Figure imgb0027
To determine the adhesive strength of the elastomers on substrates, two pieces of the materials listed in the following table are glued together using the masses and the composites obtained in this way are tested in accordance with the ASA method (American Standards Association) 116.1-1960 in a tearing machine. The following results are obtained:
Figure imgb0027

Vergleichsversuch V3 Comparative experiment V 3

Die in Beispiel 3 beschriebene Arbeitsweise wird wiederholt mit der Abänderung, daß 2 Teile des Silans der formel

Figure imgb0028
anstelle der 2 Teile der in Beispiel 1 beschriebenen Organosiliciumverbindung mit über Kohlenstoff an Silicium gebundenen Aminogruppen und Siloxansauerstoffatomen eingesetzt werden. Die so hergestellte Masse ist unter Ausschluß von Wasser lagerfähig. Unter der Einwirkung des in der Luft enthaltenem Wasserdampfs bildet die Masse jedoch nur eine Haut an der Oberfläche und härtet nicht zu einem Elastomeren. Es war nicht zu erwarten, daß die erfindungsgemäßen Massen auch Abwesenheit von Kondensationskatalysator durchhärten würden, weil sich die erfindungsgemäß verwendeten Organosiliciumverbindungen (3) ven den gemäß DE-OS 19 64 502 verwendeten Organosiliciumverbindungen mit über Kohlenstoff an Silicium gebundener Aminogruppe im wesentlichen nur durch die zusätzliche Anwesenheit von Siloxansauerstoff unterscheiden.The procedure described in Example 3 is repeated with the modification that 2 parts of the silane of the formula
Figure imgb0028
 instead of the 2 parts of the organosilicon compound described in Example 1 with amino groups bonded to silicon via carbon and siloxane oxygen atoms. The mass produced in this way can be stored in the absence of water. However, under the influence of the water vapor contained in the air, the mass only forms a skin on the surface and does not harden into an elastomer. It was not to be expected that the compositions according to the invention would cure even in the absence of a condensation catalyst, because the organosilicon compounds (3) used according to the invention, the organosilicon compounds used according to DE-OS 19 64 502 with an amino group bonded via carbon to silicon, essentially only by the additional Distinguish the presence of siloxane oxygen.

Claims (3)

1. Compositions that are storable with the exclusion of water and that crosslink at room temperature upon the admission of water to form elastomers, which compositions consist of (1) a diorganopolysiloxane having condensable terminal groups, (2) a silicon compound having, per molecule, a total of at least three amino groups bonded to silicon via nitrogen and/or oxime groups bonded to silicon via oxygen, and, as at least one further constituent, at least one (3) organosilicon compound having at least one amino group bonded to silicon via carbon, characterised in that at least part of the organosilicon compound (3) contains at least one siloxane oxygen atom, and is present in an amount of from 0.1 to 20% by weight, calculated on the total weight of the composition.
2. Compositions according to claim 1, characterised in that they contain, as the organosilicon compound (3), at least one organopolysiloxane of the general formula
Figure imgb0037
in which R denotes the same or different, monovalent, optionally substituted, hydrocarbon radicals, A denotes the same or different radicals of the formula
Figure imgb0038
in which R1 denotes hydrogen or a monovalent, optionally substituted, hydrocarbon radical, Q denotes oxygen or the grouping -NR', a is 0 or 1 and p is an integer having a value of from 1 to 10, Y denotes the same or different radicals of the formula
Figure imgb0039
in which each of A, R and a have the meanings given above, R2 denotes hydrogen or the same or different, monovalent, hydrocarbon radicals optionally interrupted by at least one ether oxygen atom, b is 0, 1, 2 or 3 and the sum of a and b is not more than 3, m is 0 or an integer having a value of from 1 to 2000 and n is 0 or an integer having a value of from 1 to 1000, provided that at least one radical A is present per organopolysiloxane (3).
3. Compositions according to claim 2, characterised in that A denotes the same or different radicals of the formula
Figure imgb0040
in which Q has the meaning given above.
EP78100691A 1977-08-18 1978-08-17 Polysiloxanes based compositions convertible into elastomers by cross-linking Expired EP0000929B1 (en)

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NO149697C (en) 1984-06-06
DE2737303B2 (en) 1979-10-18
BR7805201A (en) 1979-05-02
NO782794L (en) 1979-02-20
IT7850743A0 (en) 1978-08-16
DE2860547D1 (en) 1981-04-16
DE2737303C3 (en) 1980-07-17
JPS5525228B2 (en) 1980-07-04
EP0000929A1 (en) 1979-03-07
SE443989B (en) 1986-03-17
AT383608B (en) 1987-07-27
CA1124429A (en) 1982-05-25
AU3869278A (en) 1980-02-14
IT1106889B (en) 1985-11-18
AU521250B2 (en) 1982-03-25
NO149697B (en) 1984-02-27
DE2737303A1 (en) 1979-03-01
US4191817A (en) 1980-03-04
JPS5443261A (en) 1979-04-05
ATA595678A (en) 1986-12-15

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