WO1995005349A1 - Ensemble vitre isolant a joint d'etancheite peripheriquea thermodurcissement rapide - Google Patents

Ensemble vitre isolant a joint d'etancheite peripheriquea thermodurcissement rapide Download PDF

Info

Publication number
WO1995005349A1
WO1995005349A1 PCT/US1994/009597 US9409597W WO9505349A1 WO 1995005349 A1 WO1995005349 A1 WO 1995005349A1 US 9409597 W US9409597 W US 9409597W WO 9505349 A1 WO9505349 A1 WO 9505349A1
Authority
WO
WIPO (PCT)
Prior art keywords
sealing composition
glass
recesses
streams
panes
Prior art date
Application number
PCT/US1994/009597
Other languages
English (en)
Inventor
James E. Larsen
Michael Haugsby
Original Assignee
Cardinal Ig Company
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Cardinal Ig Company filed Critical Cardinal Ig Company
Publication of WO1995005349A1 publication Critical patent/WO1995005349A1/fr

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
    • C03C27/00—Joining pieces of glass to pieces of other inorganic material; Joining glass to glass other than by fusing
    • C03C27/04—Joining glass to metal by means of an interlayer
    • C03C27/048—Joining glass to metal by means of an interlayer consisting of an adhesive specially adapted for that purpose
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K3/00—Materials not provided for elsewhere
    • C09K3/10—Materials in mouldable or extrudable form for sealing or packing joints or covers
    • C09K3/1006—Materials in mouldable or extrudable form for sealing or packing joints or covers characterised by the chemical nature of one of its constituents
    • C09K3/1018—Macromolecular compounds having one or more carbon-to-silicon linkages
    • E—FIXED CONSTRUCTIONS
    • E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
    • E06B—FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
    • E06B3/00—Window sashes, door leaves, or like elements for closing wall or like openings; Layout of fixed or moving closures, e.g. windows in wall or like openings; Features of rigidly-mounted outer frames relating to the mounting of wing frames
    • E06B3/66—Units comprising two or more parallel glass or like panes permanently secured together
    • E06B3/673—Assembling the units
    • E06B3/67339—Working the edges of already assembled units
    • E06B3/67343—Filling or covering the edges with synthetic hardenable substances

Definitions

  • the present invention relates to the field of insulating glass units, comprising two, three or more parallel glass panes which are spaced from one another by means of elongated spacers positioned between the panes adjacent their edges.
  • Insulating glass units commonly have a peripheral spacer of metal, glass or other material between panes at their edges to maintain the panes in a spaced-apart position and to seal the edges of the unit so that water vapor or other contaminants do not permeate into the interpane space.
  • the peripheral spacer itself may be of metal such as stainless steel and may be provided in hollow, tubular form.
  • One such tubular design is shown in European Patent Application Publication No. 0 403 058. That publication depicts a tubular spacer section having flat outer surfaces that are sealed to confronting glass pane surfaces and also a "W" -shaped outer wall. Portions of the outer wall converge outwardly and form generally wedge-shaped recesses with the confronting surfaces of the glass panes.
  • a polymeric sealant, such as a silicone may be inserted into these recesses, and this provides the insulating glass unit with a pair of spaced sealant strips that are spaced from one another and that extend around the entire periphery of the windows.
  • This spacer is made of thin metal, and its flat side walls are adhered to the confronting glass surfaces by a thin strip of sealant material such as polyisobutylene ("PIB").
  • PIB polyisobutylene
  • the spacer may be made of aluminum or similar metal, preferably the metal spacer is made of thin (e.g., 0.05 inches in thickness) stainless steel. Spacers of this type are strong but not particularly rigid.
  • the insulating glass units commonly are maintained in either a horizontal or a vertical position as the sealant is applied, and if the sealant is too readily flowable after it is deposited in the spaced recesses, it may slump or flow out of the recesses under the force of gravity.
  • the present invention provides a method for manufacturing an insulating glass unit which employs a heat curable silicone resin sealant composition.
  • the glass unit comprises an insulating glass structure having parallel, spaced glass panes defining between them an interpane space and a peripheral support supporting and spacing the panes with respect to each other. Respective confronting surfaces of the peripheral support and the glass panes define exteriorly accessible spaced recesses between them adjacent each glass surface.
  • the silicone sealant composition has the capacity to gel within 45 seconds at a predetermined elevated temperature. Flowable components of the heat-curable silicone sealing composition are mixed together without entrapment of air to provide a bubble-free, heat curable sealing composition, and the sealing composition is flowed into the spaces recesses. At the pre-determined elevated temperature, the composition gels within 45 seconds, thus reducing or eliminating sagging of the sealant and providing for rapid assembly of the insulating glass units.
  • the invention comprises a method of manufacturing insulating glass unit having parallel, spaced glass panes and a peripheral support, as described above, the support and panes having surfaces defining between them exteriorly accessible spaced recesses adjacent each glass surface.
  • a heat-curable silicone sealing composition is provided by mixing together without air entrapment two or more streams containing flowable components of the silicone composition, the individual streams of flowable components being independently storage stable. Upon mixing, the reactive sealing composition is immediately flowed into the recesses and into contact with said surfaces, whereupon the composition heat cures sufficiently quickly as to substantially prevent the sealing composition from sagging outwardly from the recesses and enabling the glass unit to withstand handling immediately thereafter.
  • Figure 1 is a schematic drawing of apparatus for mixing components of a heat curable silicone sealant composition and applying it to the spaced recesses of an insulating glass unit;
  • Figure 2 is a schematic view of a nozzle applicator useful in the apparatus of Figure 1;
  • Figure 3 is a schematic view of another embodiment of the nozzle applicator
  • Figure 4 is a broken-away, perspective view of an insulating glass unit showing application of a silicone resin to spaced recesses;
  • Figure 5 is a broken-away, cross-sectional view taken along line 5-5 of the Figure 4.
  • Figure 6 is a broken-away, cross-sectional view similar to Figure 5 but showing a modified spacer design. DESCRIPTION OF THE PREFERRED EMBODIMENT
  • Figures 5 and 6 show in detail two embodiments of a spacer system employed in the present invention to support and space apart a pair of parallel glass panes.
  • the panes 12, 14 are parallel and are spaced from one another.
  • a spacer 16 is positioned adjacent the periphery of the panes.
  • the spacer is generally tubular in cross-section, and it may include in its interior 18 a desiccant such as molecular sieve beads 20.
  • the spacer may be formed of stainless steel having a thickness of about 0.005 inches using known rolling or other forming techniques. It is shaped, as shown in Figure 5, to have an inner wall 22 facing the interpane space 24 and an opposed outer wall 26.
  • Side walls 28, 30 join the inner and outer walls and are provided with flat outer surfaces that are parallel to the confronting glass pane surfaces 32, 34.
  • Separate flexible sealant ribbons 36 bond the flat surfaces 28, 30 of the spacer to the respective confronting surfaces 32, 34 of the glass panes.
  • the inner wall 22 may be formed by overlapping the edges of inner wall segments 38, 40.
  • a series of spaced spot welds 42 are formed along the length of the overlapped segments. The very small openings that are thus formed between the overlapped segments 38, 40 and between the spot welds enables communication between the interior 18 of the spacer and the interpane space 24.
  • Desiccant 20 within the spacer in this manner is able to extract water vapor from the air or other gas (argon is preferred) in the interpane space.
  • the outer wall 26 of the spacer includes wall portions 44, 46 that extend outwardly in a convergent manner from the respective pane surfaces 32, 34 and form, with the pane surfaces, a pair of spaced recesses 48, 50 (Figure 6).
  • the recesses as shown, may be relatively deep and narrow with the depth of the recesses (measured parallel to the pane surfaces) exceeding the recess maximum widths (measured normal to the pane surfaces).
  • the actual configurations of the recesses may vary as desired, but each recess is defined by the confronting surfaces of a glass pane (e.g., 32 in Figure 6) and a portion of the outer spacer wall (44 in Figure 6).
  • outer wall portions of the spacers may be configured as desired.
  • Outer wall portion 26 in Figure 6 has a substantially flat center section 52, whereas the outer wall portion 26 of the more preferred spacer of Figure 5 is generally serpentine or "W"-shaped in cross-section.
  • Spacer 16 desirably is first fabricated to the desired cross section. It is thereafter bent into a generally rectangular shape to follow the periphery of the glass panes.
  • the outer wall 26 of the spacer is spaced inwardly slightly from the edges 54, 56 of the glass panes.
  • a polyisobutylene sealant is extruded as a soft, pliant bead onto each of the flat wall surfaces 28, 30 of the spacer.
  • the sealant 36 contains small glass beads to prevent undue extrusion of the sealant as taught in U.S. Patent 5,106,663, issued April 21, 1992, the teachings of which are incorporated herein by reference.
  • the desiccant 20 commonly is inserted in the tubular spacers before they are rectangularly bent and joined end to end.
  • the resulting insulating glass units thus each have a pair of spaced recesses 46, 48 bounded, respectively, by the inner surfaces of each pane. It is to the placement of sealant in these recesses that we now turn.
  • the silicone sealant composition used in the instant invention preferably is supplied in two parts commonly referred to as parts A and B, each part being relatively storage-stable until the parts are mixed together. Inhibitors, curing agents and the like are used as desired.
  • parts A and B of the silicone sealant composition are provided preferably in airtight containers.
  • Pumps 104, 106 are provided to pump the respective components from their containers at relative flow rates that insure that the components are combined in the proper proportions.
  • These pumps desirably are positive displacement pumps such as diaphragm pumps, and the pumps can be "slaved” together, that is, driven by a common mechanical linkage, to ensure that the pumps deliver fluid streams at the proper flow rate ratios.
  • the component containers 100, 102 may be pressurized as desired to insure a smooth, bubble-free flow of components to the pumps.
  • the airless mixer 108 can be any of a number of known mixer designs. For example, it may consist of inner and outer spaced tubular members, the inner tubular member rotating about its axis within the outer member.
  • Another pump type is known as a viscous rotationary shear static mixer, and such pumps are available commercially, as from Graco, Inc.
  • the resulting mixed, bubble-free material is fed under pressure to a nozzle applicator which is designated generally as 110 in Figure 1 and about which more will be said below.
  • the silicone sealant composition that issues from the nozzle applicator desirably is at an elevated temperature which permits it to gel within seconds.
  • the temperature of the silicone sealant can be controlled. These methods can be used alone or in combination with one another as desired.
  • the individual streams of components A and B are mixed in the airless mixer and the resulting sealant stream, without the addition of heat energy (and preferably at about room temperature or slightly above) is flowed through the nozzles and into the spaced recesses in the insulating glass window unit.
  • Heat energy is applied to the strips of sealant within the recesses, as by heating the edges of the glass unit with heated air.
  • the viscosity of the sealant composition can be controlled by use of fillers and the like as discussed below to prevent significant flow of the sealant out of the recesses before the sealant strips gel.
  • the sealant stream is heated before it is injected into the recesses.
  • the individual streams of components A and B are heated prior to the time that they are mixed in the airless mixer.
  • Appropriate heaters are designated as 112, 114 in Figure 1, and may be heat exchangers of the tube and shell variety. Heat energy may be added to the sealant as it is mixed in mixer 108. Heat energy may instead or in addition be added to the sealant as it travels through line 116 between the airless mixer and the nozzle applicator, or may be added at the applicator itself.
  • Figure 2 shows the mixed sealant stream entering an expansion chamber 118 to accommodate slight flow rate variances. From the expansion chamber, a stream of sealant is led to each of pumps 120, 122 which provide equal amounts of sealant to the nozzle heads schematically depicted at 124, 126. In this situation, heat may be added to the respective pumped streams by means of a heater 128 that is positioned between the pumps 120, 122 and the respective nozzles.
  • the silicone sealant composition is formulated so as to "set up”; that is, to reach its gel point, within several seconds at the temperature at which it is deposited in the respective recesses of the glass units of the invention so that the silicone composition will not impermissibly or significantly sag or slump or otherwise flow out of the recesses before it gels.
  • the method shown in Figure 2 has the benefit of delivering equal quantities of sealant to each of the two nozzles and of applying heat to the sealant only immediately before the sealant reaches the nozzles.
  • a single stream of the mixed sealant 116 passes under pressure to a nozzle manifold 128 that has a pair of nozzle openings 130.
  • the stream 116 thus is divided into parallel streams 132, 134 which are deposited in the respective recesses of the insulating glass unit.
  • Various other methods of mixing the two components and heating them just before flowing them to the glass unit recesses will be evident to those skilled in this art.
  • Figure 5 depicts a nozzle manifold 60 having a pair of spaced nozzle openings 62, 64. Between the nozzle openings is a positioning guide 66 having forward facing guide surfaces 68. The latter are oriented to contact the outer wall 26 of the spacer 16 during application of the silicone sealant to control the degree of penetration of the nozzle openings into the recesses 48, 50.
  • the forward facing guide surfaces may have one or more protrusions 70 adapted to contact one or more surfaces (such as the outwardly diverging surfaces 72,74) of outer wall of the spacer to properly maintain position of the nozzles in directions parallel to and also normal to the plane of the glass unit.
  • the glass unit may be maintained in a stationary position, and the nozzles may be made to move along the glass unit edges at an appropriate speed to permit an appropriate bead of the composition to be deposited in the recesses. The same result may be obtained by moving the edges of the glass unit past stationary nozzles.
  • the sealant composition flows easily into the recesses and quickly gels and cures to provide a strong, highly adherent and supportive pair of silicone beads.
  • the viscosity of the mixed silicone sealant is sufficiently low so as to permit the sealant to flow readily into the recesses and to expel air from the recesses.
  • the cure time of the sealant can be controlled by varying the concentrations of the various components, curing agents, retarders and the like. It is desired that the silicone sealant when heated to 110°C reach a gel point within about 45 seconds and preferably within about 10 seconds.
  • gel point reference is made to the condition in which the sealant has solidified sufficiently so that it no longer flows; the sealant at this point may yet be soft, but will be sufficiently resilient so as to rebound if it is deformed. Curing of the silicone continues for some seconds after gelation. Desirably, the gel time at 90-95 °C ranges from about 30 to about 90 seconds, and the gel time at 110°C ranges from about two to about ten seconds.
  • Silicone compositions curable to rubber comprise an alkenyl-containing polydiorganosiloxane having an average of at least two silicon-bonded alkenyl groups per molecule, an organohydrogensiloxane having an average of at least 3 silicon-bonded hydrogen atoms per molecule, a hydrosilation catalyst containing platinum, and additives which promote the adhesion to substrates against which it is cured.
  • the additives provide adhesion characteristics and bond durability under adverse conditions over extended periods of time, and do not deteriorate other cure properties or mechanical and chemical properties nor hinder their development.
  • the silicone compositions are required to adhere to the metal and glass substrates of the glass units of the invention. Combinations of ingredients may be added to silicone compositions to produce compositions which have adhesion to substrates upon which they are cured. These silicone compositions are curable by the hydrosilation reaction.
  • the ratio of silicon-bonded hydrogen to silicon-bonded alkenyl groups is within appropriate limits to accommodate the adhesion additives and produce a combination of adhesion and cure properties.
  • the silicone composition is primarily a linear polymeric material including one or more alkenyl-containing polydiorganosiloxanes.
  • the polydiorganosiloxanes contain on the average at least two alkenyl groups per molecule, the alkenyl groups having from 2 to 10 carbon atoms such as vinyl, allyl, butenyl, pentenyl, hexenyl, 7-octenyl, and/or 9-decenyl groups. In order for the composition to properly crosslink, at least 2 alkenyl groups per molecule are needed.
  • the polydiorganosiloxane is diorganoalkenylsiloxane terminated with an alkenyl group such as a vinyl group.
  • alkylene radical containing from 1 to 10 carbon atoms and s is 0 or 1.
  • the alkylene radical can be linear or branched.
  • the preferred alkenyl groups are vinyl and hexenyl.
  • Polydiorganosiloxanes which have a combination of vinyl and hexenyl groups are preferred, as the ratio of the hexenyl to vinyl can be used to regulate the rate of cure.
  • the organo groups of the polydiorganosiloxane are individually monovalent hydrocarbon radicals or substituted monovalent hydrocarbon radicals containing from 1 to 6 carbon atoms.
  • the organo radicals can be identical or different, such as methyl or ethyl, substituted alkyl such as chloromethyl, 3-chloropropyl or 3,3,3-t-rifluoropropyl, cycloalkyl such as cyclohexyl, or aryl such as phenyl.
  • a preferred radical is the methyl radical.
  • a single polydiorganosiloxane can be used or a mixture of different polydiorganosiloxanes can be used, the polymer or mixture having a viscosity ranging from 2 to 100 Pa> s at 25 °C.
  • Polymer mixtures having one polymer with only terminal vinyl groups and another polymer with both terminal vinyl groups and pendant vinyl groups on the chain are taught by Jensen, U.S. Patent No. 4,753,978. Jensen et al. U.S. Patent No. 4,946,878 and Gray et al. U.S. Patent
  • No. 5,110,845 teach the use of an alkenyl radical having at least 4 carbon atoms.
  • the crosslinking agent is an organohydrogensiloxane containing an average
  • the organohydrogensiloxane contains from as few as four silicon atoms per molecule up to an average of 100 or more, and can have a viscosity of up to 10 Pa • s or higher at 25 °C.
  • the repeating units of this ingredient include but are not limited to HSiO 1 5 , R'HSiO and/or in addition to one or more of R'HSiOj.s, R ⁇ HSiO, R ⁇ HSiO o .s, and SiO 42 units.
  • R 1 represents a monovalent hydrocarbon or halocarbon radical as defined above for R of the polydiorganosiloxane.
  • the molar ratio of silicon-bonded hydrogen atoms to alkenyl radicals (vinyl or other ethylenically unsaturated hydrocarbon radicals) in compositions curable by a hydrosilation reaction is important with respect to the properties of the cured elastomer.
  • the optimum ratio for the present curable compositions is dependent at least in part on the molecular weight of the polydiorganosiloxane and the type of curing agent.
  • An effective molar ratio of silicon-bonded hydrogen atoms to silicon-bonded alkenyl radicals is in the range of 1.2 to 2.
  • Hydrosilation reactions are typically conducted in the presence of a catalyst containing platinum.
  • Platinum compounds such as hexachloroplatinic acid, and particularly complexes of these compounds with relatively low molecular weight vinyl-containing organosiloxane compounds are preferred catalysts because of their high activity and compatibility with the organosiloxane reactants. These complexes are described in Willing, U.S. Patent No. 3,419,593.
  • the platinum-containing catalyst can be present in an amount equivalent to as little as one part by weight of platinum per one million parts by weight of curable composition. Catalyst concentrations equivalent to from 5 to 100 parts of platinum per million of curable composition are preferred to achieve a practical curing rate.
  • the silicone compositions comprising the polydiorganosiloxane can contain a paniculate filler.
  • the silicone compositions are commonly reinforced with one or more fillers such
  • silica as, for example, fumed silica. Any finely divided form of silica can be used as a reinforcing filler.
  • the amount of finely divided silica used in the present compositions is at least in part determined by the physical properties desired for the cured elastomer.
  • Liquid or pumpable silicone compositions may contain from about 10 to about 60 percent, and preferably 30 to 50 percent, by weight of silica, based on the weight of polydiorganosiloxane. This value is preferably from about 30 to about 50 percent.
  • the reinforcing filler can be modified with known silica treating agents to prevent a phenomenon referred to as "creping” or “crepe hardening” during processing of the curable composition and to provide a product which has greater stability during storage.
  • the filler can also be a non-reinforcing or extending filler of finely ground particles of oxides or hydroxides or carbonates of metals such as silicon, calcium, magnesium, barium, or zinc. Silicon oxide (quartz) and calcium carbonate are preferred non-reinforcing fillers.
  • the silicone composition preferably includes a titanium compound, an alkoxy silicon compound, an (epoxy functional organo)trialkoxysilane, and optionally gamma-methacryloxypropyl-trialkoxysilane and/or diallyl ether or trimethylolpropane. The combination of these components in controlled amounts has been found important in providing sufficient initial adhesion to substrates[,]
  • compositions containing these components have been found particularly useful for use with glass and with metal substrates such as stainless steel.
  • the (epoxy functional organo)trialkoxysilane preferably is a trialkoxysilane functionalized with an organic substitutent containing an epoxy group.
  • the alkoxy radicals of the (epoxy functional organo)trialkoxysilane may be the same or different and are usually selected from alkoxy radicals having
  • alkoxy radicals 1 to 4 carbon atoms such that the alkoxy radicals are readily hydrolyzable upon contact with water.
  • alkoxy radicals include methoxy, ethoxy, propoxy, and butoxy radicals.
  • the (epoxy functional organo)trialkoxysilane is functionalized with an organic substituent containing an epoxy group.
  • the structure of the organic substituent bearing the epoxy group may vary.
  • the alkoxy-silicon compound can be an alkyl ortho silicate or a partially hydrolyzed alkyl ortho silicate where the alkyl groups have up to about 4 carbon atoms.
  • the alkyl groups may be the same or different.
  • Alkyl ortho silicates include ethyl ortho silicate, methyl ortho silicate, n-propyl ortho silicate and butyl ortho silicate.
  • the partially hydrolyzed alkyl ortho silicates are also known as alkylpolysilicates and include, for example, ethylpolysilicate, n-propylpolysilicate, and butylpolysilicate.
  • the alkoxy-silicon compound is present in an amount of 0.25 to 5 parts by weight per 100 parts by weight of alkenyl containing polydiorganosiloxane.
  • the combined amount of (epoxy functional organo)trialkoxysilane and alkoxy-silicon compound is at least 0.5 and preferably 0.5 to 6 parts by weight per 100 parts by weight of the alkenyl-containing polydiorganosiloxane.
  • the molar amount of the alkoxy silicon compound should exceed the molar amount of (epoxy functional organo)trialkoxysilane to provide satisfactory adhesion. If both the (epoxy functional organo)trialkoxysilane and the alkoxy-silicon compound are at their lower limits, poorer adhesion is obtained.
  • the silicone compositions include a titanium compound having Ti-O-CH bonds. These titanium compounds aid in reducing the required time for development of adhesion between the cured silicone rubber and the metal and glass substrates.
  • titanium compounds include tetra-alkyltitanates such as tetraisopropyltitanate, tetrabutyltitanate, and tetraoctyltitanate and tetra-2-ethylhexyl titanate; chelated titanates such as
  • titanium compound such as (CH 3 CH 2 CH 2 O) 3 TiOTi(OCH 2 CH 2 CH 3 ) 3 .
  • the amounts of titanium compound can be from 0.01 to 0.5 part by weight per 100 parts by weight of alkenyl-containing polydiorganosiloxane.
  • the silicone compositions can optimally contain an olefinically unsaturated alkoxy silane.
  • silanes are typified by gamma-methacryloxypropryltrialkoxysilane, vinyltrialkoxysilane, hexenyltrialkoxysilane, and the like in which the alkoxy groups preferably contain from 1 to 4 carbon atoms per alkoxy group, such as methoxy, ethoxy, propoxy, and butoxy groups.
  • These olefinically unsaturated alkoxy silanes can be present in amounts up to about 1 weight percent based on the weight of the silicone composition.
  • the silicone compositions can also optionally contain an unsaturated non-silicon-containing ether such as the diallyl ether of trimethylolpropane, monoallyl ether of trimethylolpropane, monoallyl ether of glycerol, diallyl ether of glycerol, monoallyl ether of ethylene glycol, monoallyl ether of diglycerol, diallyl ether of diglycerol, monoallyl ether of pentaerythritol, diallyl ether of pentaerythritol, and triallyl ether of pentaerythritol.
  • the unsaturated non-silicon-containing ethers can lengthen cure times, particularly noticeable at lower temperatures.
  • Amounts of up to 1.5 weight percent of the unsaturated non-silicon-containing ether based on the weight of the silicone composition can be used; preferred amounts range from about 0.1 to 1.2 weight percent of unsaturated non-silicon-containing ether based on the weight of the silicone composition.
  • the unsaturated non-silicon-containing ether is useful to provide silicone compositions with increased adhesive tensile strengths of the cured product. Therefore, one determines the value of curing time of the silicone composition verse adhesive tensile strength for the cured product for their particular application.
  • the unsaturated non-silicon-containing ether may be left out of the silicone composition, but if the adhesive tensile strength of the cured product is more important to the particular application than the speed of the cure, then the unsaturated non-silicon-containing ether may be useful. Of course, if smaller amounts of the unsaturated non-silicon-containing ether are used, one may improve the adhesive tensile strength of the cured product and maintain a reasonable curing time for the silicone composition at lower temperatures.
  • the most preferred silicone compositions are those which are packaged in at least two containers. These preferred silicone compositions are stored by including in the first container the titanium compound and the platinum catalyst, and by including in the second container the organohydrogensiloxane. When unsaturated non-silicon-containing ethers are used, it is preferred to include such ethers in the first container for maximum storage stability and for the best results during curing and for the best results for the properties of the cured products.
  • the compositions can be prepared by a simple mixing of the ingredients. As mentioned above, it is desired to provide the ingredients in two individually stable parts such that a when the parts are mixed together, the composition will begin to cure unless a cure inhibitor is present.
  • organohydrogensiloxane is placed in one part and the platinum catalyst and the titanium compound are placed in another part, the individual parts will be shelf stable.
  • the amounts of polydiorganosiloxane and filler that are placed in each part can be varied to obtain the desired result. Two-package compositions where the contents of the two packages are mixed together in equal amounts are preferred. Other proportions of the ingredients can, of course, be used, as well as more than two parts if desired.
  • the silicone compositions develop adhesion without the use of primers when the composition is cured against glass and metal substrates.
  • These silicone compositions can be cured rapidly at low temperatures, such as from room temperature to 80°C. At room temperature, the silicone compositions can be cured in one or two hours, but at about 80 °C, it can be cured in less than five minutes and can be gelled in a matter of seconds.
  • the rubber obtained by curing the composition exhibits both dry and wet adhesion to the glass and metal substrates. Dry adhesion is determined by measuring the adhesion of a substrate-rubber test piece over a defined period of time at a defined temperature.
  • wet adhesion is determined by measuring the adhesion of a substrate-rubber test piece which has been immersed in water for a defined period of time at a defined temperature.
  • the silicone compositions develop sufficient initial adhesion to glass and stainless steel to allow handling of glass units.
  • the cured silicone rubber has sufficient initial or "green" tensile strength so that glass units of the invention can be handled substantially immediately following manufacture.
  • the first part (part A) of a two-part silicone sealant composition was prepared by combining and mixing together in a first container 947 parts by weight of a dimethylvinylsiloxy endblocked polydimethylsiloxane having a viscosity of about 55 Pa- s at 25° C as measured by a rotational viscometer with spindle number 5 at 4 rpm, 5.3 parts by weight of a dimethylhexenylsiloxy endblocked poly(dimethylsiloxane-hexenylmethylsiloxane) having about 2 mole percent hexenylmethylsiloxane units and a viscosity at 25°C of about 0.45 Pa- S, 17.9 parts by weight of a hexamethyldisilazane treated filmed silica filler having a surface area of about 400 m 2 /g, 0.36 part by weight of a platinum catalyst which was a reaction product of hexachlorplatinic acid and sym-
  • the second part (part B) of the two-part composition was prepared in a second container by combining with mixing 94.7 parts by weight of a dimethylvinylsiloxy endblocked polydimethylsiloxane having viscosity of about 55 Pa- s at 25° C as measured by a rotational viscometer with spindle number 5 at 4 rpm, 5.3 parts by weight of a dimethylhexenylsiloxy endblocked poly(dimethylsiloxane-hexenylmethylsiloxane) having about 2 mole percent hexenylmethylsiloxane units and a viscosity at 25 °C of about 0.45 Pa- s, 17.9 parts by weight of a hexamethyldisilazane treated fumed silica filler having a surface area of about 400 m 2 /g, 3.9 poly(dimethylsiloxane-methylhydrogensiloxane) having an average of about 3 dimethylsiloxane units and
  • Equal quantities of parts A and B are mixed together in an airless mixer and are heated to above about 80 °C.
  • the heated sealant composition is immediately flowed through nozzles into the exteriorly accessible spaces defined by respective confronting surfaces of a stainless steel spacer and spaced glass panes between which the spacer is bonded. Gelling of the sealant composition occurs within seconds, and the resulting glass units can be handled immediately thereafter.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Ceramic Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Joining Of Glass To Other Materials (AREA)

Abstract

Procédé de production d'un ensemble vitre isolant. L'ensemble vitre comprend une structure isolante munie de panneaux de vitre parallèles espacés (12, 14), définissant un espace intermédiaire (24), ainsi que d'un support périphérique (16) soutenant et espaçant les panneaux l'un par rapport à l'autre. Des surfaces opposées respectives du support périphérique et des panneaux de vitre définissent des évidements (48, 50) espacés intermédiaires, accessibles de l'extérieur, adjacents à chaque surface vitrée. Selon un mode de réalisation, la composition du mastic d'étanchéité à base de silicone est apte à se gélifier en moins de 45 secondes à une température élevée prédéterminée. Des constituants coulants de la composition d'étanchéité à base de silicone thermodurcissable sont mélangés sans inclusion d'air afin de produire une composition d'étanchéité thermodurcissable dépourvue de bulles, et on fait couler ladite composition (36) dans les évidements à une température élevée prédéterminée afin qu'elle se gélifie en moins de 45 secondes, ce qui réduit ou supprime l'affaissement du mastic et permet de monter rapidemenent les ensembles vitre isolants.
PCT/US1994/009597 1993-08-17 1994-08-17 Ensemble vitre isolant a joint d'etancheite peripheriquea thermodurcissement rapide WO1995005349A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US10796393A 1993-08-17 1993-08-17
US08/107,963 1993-08-17

Publications (1)

Publication Number Publication Date
WO1995005349A1 true WO1995005349A1 (fr) 1995-02-23

Family

ID=22319439

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US1994/009597 WO1995005349A1 (fr) 1993-08-17 1994-08-17 Ensemble vitre isolant a joint d'etancheite peripheriquea thermodurcissement rapide

Country Status (1)

Country Link
WO (1) WO1995005349A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2003021070A1 (fr) * 2001-08-28 2003-03-13 Cardinal Ig Company Etancheification d'unites en verre isolant
WO2009053090A2 (fr) 2007-10-24 2009-04-30 Bystronic Lenhardt Gmbh Dispositif pour injecter un boudin d'une masse pâteuse dans l'espace intermédiaire entre deux plaques de verre d'un vitrage isolant
US9556666B1 (en) 2015-09-03 2017-01-31 Cardinal Ig Company Automatic adjustable nozzle systems
US10221614B2 (en) 2015-09-04 2019-03-05 Quanex Ig Systems, Inc. Insulating glass unit compression-injection coated patch and method

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3759771A (en) * 1971-04-26 1973-09-18 W Battersby Method of making double glazing unit
US3852149A (en) * 1972-04-19 1974-12-03 Novogard Corp Insulating glass window assemblies
US4322518A (en) * 1980-12-02 1982-03-30 Dow Corning Corporation Curable silicone compositions comprising liquid resin and uses thereof
US4474724A (en) * 1982-09-22 1984-10-02 General Electric Company Liquid injection molding machine for utilizing silicone compositions
US4622249A (en) * 1985-04-15 1986-11-11 Ppg Industries, Inc. Multiple pane unit having a flexible spacing and sealing assembly
EP0403058A1 (fr) * 1989-06-16 1990-12-19 Cardinal Ig Company Vitrage isolant avec entretoise isolante

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3759771A (en) * 1971-04-26 1973-09-18 W Battersby Method of making double glazing unit
US3852149A (en) * 1972-04-19 1974-12-03 Novogard Corp Insulating glass window assemblies
US4322518A (en) * 1980-12-02 1982-03-30 Dow Corning Corporation Curable silicone compositions comprising liquid resin and uses thereof
US4474724A (en) * 1982-09-22 1984-10-02 General Electric Company Liquid injection molding machine for utilizing silicone compositions
US4622249A (en) * 1985-04-15 1986-11-11 Ppg Industries, Inc. Multiple pane unit having a flexible spacing and sealing assembly
EP0403058A1 (fr) * 1989-06-16 1990-12-19 Cardinal Ig Company Vitrage isolant avec entretoise isolante

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2003021070A1 (fr) * 2001-08-28 2003-03-13 Cardinal Ig Company Etancheification d'unites en verre isolant
US6606837B2 (en) 2001-08-28 2003-08-19 Cardinal Ig Methods and devices for simultaneous application of end sealant and sash sealant
WO2009053090A2 (fr) 2007-10-24 2009-04-30 Bystronic Lenhardt Gmbh Dispositif pour injecter un boudin d'une masse pâteuse dans l'espace intermédiaire entre deux plaques de verre d'un vitrage isolant
EP2203287B1 (fr) * 2007-10-24 2016-07-13 Bystronic Lenhardt GmbH Utilisation d'un dispositif pour injecter un boudin d'une masse pâteuse dans l'espace intermédiaire entre deux plaques de verre d'un vitrage isolant
US9556666B1 (en) 2015-09-03 2017-01-31 Cardinal Ig Company Automatic adjustable nozzle systems
US10221614B2 (en) 2015-09-04 2019-03-05 Quanex Ig Systems, Inc. Insulating glass unit compression-injection coated patch and method

Similar Documents

Publication Publication Date Title
EP0639622B1 (fr) Caoutchouc de silicone auto-adhésif au verre et métal
JP2778755B2 (ja) シリコーンシーラント製造方法
EP0438221B1 (fr) Masses d'étanchéité à base de siloxanes ayant une adhésion améliorée
EP0916801B1 (fr) Vitrages isolants et procédé de la fabrication des vitrages isolants
US5833798A (en) Adhesion method employing organosiloxane compositions
KR101607631B1 (ko) 속성 심부 경화 실리콘 조성물들
US20040002571A1 (en) Room temperature curable organopolysiloxane compositions
US4973644A (en) Room temperature-curable organopolysiloxane composition
EP1464675B1 (fr) Usage de compositions RTV-organopolysiloxanes pour scellement de doubles vitrages
US20190211613A1 (en) Insulating glass unit
KR101462008B1 (ko) 속성 심부 경화 실리콘 러버 성분을 갖는 건축 유닛
US7582717B2 (en) Crosslinkable composition based on organosilicon compounds
EP0693533B1 (fr) Composition de silicone élastomérique durcissable à température ambiante
EP0802222A1 (fr) Procédé pour améliorer l'adhésion de compositions de silicone
CN108329478A (zh) 一种硅烷封端ms树脂及其制备方法
WO1995005349A1 (fr) Ensemble vitre isolant a joint d'etancheite peripheriquea thermodurcissement rapide
JP5009042B2 (ja) 室温硬化性ポリオルガノシロキサン組成物
JP4768787B2 (ja) 有機ケイ素化合物を基礎とする架橋可能なコンパウンドの連続的製造方法
CN117916323A (zh) 非流挂的组合物
KR20190120270A (ko) 오르가닐옥시기를 포함하는 오르가노폴리실록산을 기초로 하는 가교 가능한 물질
CA1331322C (fr) Adhesion d'elastomeres de silicone obtenus a partir d'emulsions aqueuses
JP2883532B2 (ja) シリコーン発泡体層を設けたガラスルーバー用型ガラス
CN116209701A (zh) 有机硅密封剂制备
KR20230112610A (ko) 더 긴 믹서 오픈 타임을 갖는 속경화성 2성분형 실리콘 조성물
JPH09279122A (ja) 蓄熱水槽用目地シール材及び蓄熱水槽

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A1

Designated state(s): CA JP

AL Designated countries for regional patents

Kind code of ref document: A1

Designated state(s): AT BE CH DE DK ES FR GB GR IE IT LU MC NL PT SE

121 Ep: the epo has been informed by wipo that ep was designated in this application
DFPE Request for preliminary examination filed prior to expiration of 19th month from priority date (pct application filed before 20040101)
122 Ep: pct application non-entry in european phase
NENP Non-entry into the national phase

Ref country code: CA