WO2006136679A1 - Composition organopolysiloxanique vulcanisable a temperature ambiante en elastomere auto-adherent - Google Patents
Composition organopolysiloxanique vulcanisable a temperature ambiante en elastomere auto-adherent Download PDFInfo
- Publication number
- WO2006136679A1 WO2006136679A1 PCT/FR2006/001344 FR2006001344W WO2006136679A1 WO 2006136679 A1 WO2006136679 A1 WO 2006136679A1 FR 2006001344 W FR2006001344 W FR 2006001344W WO 2006136679 A1 WO2006136679 A1 WO 2006136679A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- parts
- weight
- formula
- saturated
- radical
- Prior art date
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J183/00—Adhesives based on 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; Adhesives based on derivatives of such polymers
- C09J183/04—Polysiloxanes
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K5/00—Use of organic ingredients
- C08K5/0091—Complexes with metal-heteroatom-bonds
-
- 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
- C08G77/06—Preparatory processes
- C08G77/08—Preparatory processes characterised by the catalysts used
-
- 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
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K5/00—Use of organic ingredients
- C08K5/54—Silicon-containing compounds
- C08K5/541—Silicon-containing compounds containing oxygen
- C08K5/5415—Silicon-containing compounds containing oxygen containing at least one Si—O bond
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K5/00—Use of organic ingredients
- C08K5/54—Silicon-containing compounds
- C08K5/544—Silicon-containing compounds containing nitrogen
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K5/00—Use of organic ingredients
- C08K5/56—Organo-metallic compounds, i.e. organic compounds containing a metal-to-carbon bond
- C08K5/57—Organo-tin compounds
-
- 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
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J183/00—Adhesives based on 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; Adhesives based on derivatives of such polymers
Definitions
- the present invention relates to an organopolysiloxane composition that can be vulcanized from room temperature to a self-adhering elastomer on a variety of substrates, in particular glass, metals, wood, polycarbonates and plastics such as polyvinyl chloride (PVC). and this even in a confined atmosphere and after a heat treatment. More particularly, the present invention relates to compositions presented before use in the form of 2 components (RTV-2).
- the organopolysiloxane compositions that can be vulcanized at room temperature are well known and are classified into two distinct groups: single-component compositions (RTV-1) and two-component compositions (RTV-2).
- the one-component compositions crosslink when exposed to moisture in the air, i.e. they can not crosslink in a confined environment.
- a solution to this problem is described in the French patent application FR-2603894, which describes an organopolysiloxane elastomer-hardening composition even in a confined atmosphere carrying acyloxy radicals bonded to silicon atoms and containing an accelerating accelerator added before use, chosen from the following hydroxides or oxides: CaO, SrO and BaO.
- an accelerating accelerator added before use chosen from the following hydroxides or oxides: CaO, SrO and BaO.
- these RTV-1 accelerated curing which can crosslink in confined have the disadvantage of poorly adhere to various substrates such as metals, wood, plastics, concrete etc.
- the two-component compositions When the two-component compositions, they are marketed and stored in the form of two components, a first component containing the base polymeric materials and the second component containing the catalyst. The two components are mixed during use and the crosslinked mixture in the form of a relatively hard elastomer.
- compositions are well known and are described in particular in Walter NoII "Chemistry and Technology of Silicones" 1968, 2nd edition on pages 395 to 398. These compositions essentially comprise 4 different ingredients:
- crosslinking agent generally a silicate or a polysilicate, a tin catalyst, and water.
- the time of implementation (“pot-life” or “working time”), that is to say the time during which the composition can be used after mixing without hardening, must be long enough, for allow its use but short enough to obtain a moldable object manipulable no later than a few minutes after its manufacture.
- the catalyst must therefore make it possible to obtain a good compromise between the time of use of the catalyzed mixture and the time at the end of which the molded object is manipulable.
- the catalyst must give the catalyzed mixture a spreading time that does not vary with the storage time.
- the present invention relates to a vulcanizable organopolysiloxane composition of silicone elastomer from room temperature by polycondensation reactions comprising:
- a silicone base capable of curing silicone elastomer in the presence of a catalyst by polycondensation reactions comprising:
- composition (b) a catalytically effective amount of a polycondensation catalyst system (D), said composition being characterized in that the catalyst system (D) is a mixture
- the stanno-silicic compounds (D1) and (D2) are the product of the reaction of at least one organoalkoxysilane corresponding to the following general formula (I):
- the substituents R 0 represent: a saturated or unsaturated, linear or branched aliphatic hydrocarbon group, a saturated or unsaturated and / or aromatic, monocyclic or polycyclic carbocyclic group; the substituents R 1 , which may be identical or different, represent a hydrocarbon group; aliphatic, saturated or unsaturated; R 1 may also mean a radical ROR ' 1 in which R is a divalent hydrocarbon radical having up to 6 carbon atoms and R ' 1 represents a saturated or unsaturated aliphatic hydrocarbon group;
- the substituents R 2 , R 3 and R 4 each independently represent a saturated or unsaturated, linear or branched aliphatic hydrocarbon group, a carbocyclic group, saturated or unsaturated and / or aromatic, monocyclic or polycyclic; and
- polyalkoxysilane amine compound (D3) has the general formula:
- R 5 represents a saturated or unsaturated aliphatic hydrocarbon group, linear or branched, a carbocyclic group, saturated or unsaturated and / or aromatic, monocyclic or polycyclic,
- R 7 represent each, independently of one another, a saturated or unsaturated aliphatic hydrocarbon group
- R 6 represents a functional group of formula:
- Z represents a divalent radical derived from a group chosen from: a saturated or unsaturated aliphatic hydrocarbon group, a saturated, unsaturated and / or aromatic, monocyclic or polycyclic carbocyclic group; said divalent radical being optionally substituted or interrupted by at least one oxygen atom and / or at least one nitrogen atom;
- X represents:
- substituents R 8 and R 9 identical or different, each represent a hydrogen atom, a linear or branched, saturated or unsaturated aliphatic hydrocarbon group, optionally substituted by an amino group, a group carbocyclic, saturated or unsaturated and / or aromatic, monocyclic or polycyclic, the substituents R 8 and R 9 may optionally also form together with the nitrogen atom to which they are attached a ring having in the ring 3 to 6 carbon atoms; carbon and 1 or 2 nitrogen atoms; or
- R 10 represents a divalent radical derived from a group chosen from: a saturated or unsaturated aliphatic hydrocarbon group, a carbocyclic group, saturated, unsaturated and / or aromatic, monocyclic or polycyclic; and a group having a saturated or unsaturated aliphatic hydrocarbon portion and a saturated, unsaturated and / or aromatic, monocyclic or polycyclic carbocyclic moiety; said divalent radical being optionally substituted or interrupted by at least one oxygen atom and / or at least one nitrogen atom; said polyalkoxysilane amine (D3) possibly being in the form of a hydrocondensate derived from the formula (III). 5
- the Applicant has had the merit of highlighting, quite surprisingly and unexpectedly, that the use of a catalytic system consisting of a combination of two particular stanno-silicic compounds (D1) and ( D2) with a polyalkoxysilane amine (D3) as defined above, makes it possible to obtain a composition ready to LO the use which has:
- the stanno-silicic compounds (D1) and (D2) are prepared separately from each other according to the following steps: a) is reacted at a temperature ⁇ 80 ° C, preferably between 95 ° C. and 140 ° C., at least one organoalkoxysilane (I) as described above with at least one dialkyltin (II) salt as described above, and (b) isolating the resulting product.
- aliphatic hydrocarbon group is meant a linear or branched group, preferably comprising from 1 to 25 carbon atoms, optionally substituted.
- said aliphatic hydrocarbon group comprises from 1 to 18 carbon atoms, better still from 1 to 8 carbon atoms and better still from 1 to 6 carbon atoms.
- alkyl groups such as the methyl, ethyl, propyl, isopropyl, n-butyl, isobutyl, t-butyl, pentyl, isopentyl, neopentyl, 2-methylbutyl and 1-ethylpropyl radicals.
- the unsaturated aliphatic hydrocarbon groups comprise one or more unsaturations, preferably one, two or three unsaturations of the ethylenic (double bond) or / and acetylenic (triple bond) type.
- Examples are alkenyl or -alkynyl groups derived from the alkyl groups defined above by removal of two or more hydrogen atoms.
- the unsaturated aliphatic hydrocarbon groups comprise a single unsaturation.
- carbocyclic group is understood to mean a monocyclic or polycyclic radical, optionally substituted, preferably C 3 -C 50 .
- it is a C 3 -C 18 radical, preferably mono-, bi- or tricyclic.
- the carbocyclic group comprises more than one ring nucleus (case of polycyclic carbocycles)
- the cyclic rings are condensed in pairs. Two fused rings may be ortho-condensed or pericondensed.
- the carbocyclic group may comprise, unless otherwise indicated, a saturated portion and / or an aromatic moiety and / or an unsaturated moiety.
- saturated carbocyclic groups are cycloalkyl groups.
- the cycloalkyl groups are C 3 -C 18 , more preferably C 5 -C 10 .
- Mention may in particular be made of cyclopentyl, cyclohexyl, cycloheptyl, cyclooctyl, adamantyl or norbornyl radicals.
- the unsaturated carbocycle or any unsaturated carbocyclic moiety has one or more ethylenic unsaturations, preferably one, two or three. It advantageously has from 6 to 50 carbon atoms, more preferably from 6 to 20, for example from 6 to 18.
- unsaturated carbocycles are C 6 -C 10 cycloalkenyl groups.
- aromatic carbocyclic radicals are (C 6 -C 18 ) aryl groups, more preferably (C 6 -C 12 ) aryl and especially phenyl, naphthyl, anthryl and phenanthryl.
- a group having both a hydrocarbon aliphatic moiety as defined above and a carbocyclic moiety as defined above is, for example, an arylalkyl group such as benzyl, or an alkylaryl group such as tolyl.
- the substituents of the hydrocarbon aliphatic groups or moieties and carbocyclic groups or moieties are, for example, alkoxy groups in which the alkyl moiety is preferably as defined above.
- the Porganoalkoxysilane substituents of formula (I) and the dialkyltin salt of formula (11) are defined as follows:
- - R 0 represents an alkyl radical, linear or branched Ci-C 8 cycloalkyl radical C 5 - C 10 aryl radical or a C B -C B; preferably a methyl, ethyl, propyl, i-propyl, n-butyl, t-butyl, cyclohexyl or phenyl radical;
- - R 1 represents a linear or branched C 1 -C 6 alkyl radical; preferably a methyl, ethyl, propyl, i-propyl, n-butyl or t-butyl radical and even more preferably a methyl or ethyl radical,
- R 2 and R 3 identical or different, each represents an alkyl radical, linear or branched C 1 5 -C 8 cycloalkyl, C 5 -C 0 or an aryl radical of C 3 -C 8; preferably a linear or branched C 1 -C 8 alkyl radical, and
- R 4 represents linear or branched C 1 -C 30 alkyl radical, preferably a C 1 -C 2 0 linear alkyl radical and even more preferentially a methyl radical or an undecane (Cn) radical.
- organoalkoxysilanes of formula (I) are well known compounds described in particular in French patents FFM 330 625, FR-2 121 289, FR-2 121 631, FR-2 458 572 and FR-2 592 657 cited as references.
- the organoalkoxysilane of formula (I) is tetraethoxysilane or tetramethoxysilane.
- dialkyl tin salts of formula (II) are well known compounds described in particular in the French patent FR-2,592,657 cited as reference.
- dialkyl tin salts of formula 1 For example, the dialkyl tin salts of formula
- dialkyll-tin salt of formula (II) is chosen from the group consisting of:
- the stanno-silicic compound (D1) is the product of the reaction between tetramethoxysilane and dibutyltin dilaurate of formula:
- the stanno-silicic compound (D2) is the product of the reaction between tetraethoxysilane and dibutyltin diacetate of formula:
- polyalkoxysilane amine compounds (D3) may be mentioned those of formulas below: [H 2 N (CH 2 ) 3] Si (OCH 2 CH 2 CH 3 ) 3
- stanno-silicic compound (D1) which is the product of the reaction between tetramethoxysilane and dibutyltin dilaurate of formula:
- the catalytic system which has just been described is used to allow or facilitate the curing of silicone silicates, from room temperature, crosslinkable polyorganosiloxane bases by polycondensation reactions in the form of two-component.
- the catalytic system is incorporated in one of the fractions with a crosslinking agent (B) while the other fraction contains a reactive polyorganosiloxane (A) and water.
- the organopolysiloxane composition according to the invention comprises:
- a silicone base capable of curing silicone elastomer in the presence of a catalyst by polycondensation reactions comprising:
- ⁇ , ⁇ -dihydroxydiorganopolysiloxane reactive polymer (A) the organic radicals of which are hydrocarbon radicals preferably chosen from the group consisting of: alkyls having from 1 to 20 carbon atoms; cycloalkyls having 3 to 8 carbon atoms; alkenyls having 2 to 8 carbon atoms and cycloalkenyls having 5 to 8 carbon atoms;
- crosslinking agent (B) chosen from the group consisting of: polyacoxysilanes, products resulting from the partial hydrolysis of a polyalkoxysilane and polyalkoxysiloxanes;
- non-reactive linear polyorganosiloxane polymer (E) consisting of a linear homopolymer or copolymer of which, by molecule, the monovalent organic substituents, identical or different from each other, bonded to the silicon atoms are chosen from alkyl, cyanoalkyl, alkenyl, aryl, alkylarylenes and arylalkylenes,
- auxiliary additives such as plasticizing agents; crosslinking retarders, mineral oils, antimicrobial agents, heat resistance additives such as titanium, iron or cerium oxides, and
- the reactive ⁇ , ⁇ -dihydroxydiorganopolysiloxane polymer (A) that can be used in the silicone bases according to the invention are more particularly those corresponding to the following formula (1): d)
- substituents R 11 which may be identical or different, each represent a substituted or unsubstituted, aliphatic, cyclanic or aromatic, saturated or unsaturated C 1 -C 13 hydrocarbon monovalent radical, and
- n has a value sufficient to give the polyorganosiloxane of formula (1) a dynamic viscosity at 25 ° C ranging from 10 to 1,000,000 mPa.s;
- reactive polyorganosiloxane (A) a mixture consisting of several hydroxylated polyorganosiloxanes which differ from each other by the value of the viscosity and / or the nature of the substituents bonded to the atoms. of silicon.
- the hydroxylated polyorganosiloxanes of formula (1) may optionally comprise T units of the formula R 12 Si0 3/2 and / or Q units of the formula SiO 4/2 in a proportion of at most 1% (these% expressing the number of T and / or Q units per 100 silicon atoms).
- Linear reactive diorganopolysiloxane hydroxyl polymers (A) having a dynamic viscosity at 25 ° C. ranging from 10 to 1,000,000 mPa.s and preferably from 50 to
- R 11 and R 12 mentioned above for the reactive polyorganosiloxanes (A) may be chosen from the following radicals:
- alkyl and haloalkyl radicals having 1 to 13 carbon atoms such as the methyl, ethyl, propyl, isopropyl, butyl, pentyl, hexyl, 2-ethylhexyl, octyl, decyl or 3,3,3-trifluoropropyl radicals, 4,4,4-trifluorobutyl, 4,4,4,3,3-pentafluorobutyl,
- cycloalkyl and halogenocycloalkyl radicals having 5 to 13 carbon atoms such as cyclopentyl, cyclohexyl, methylcyclohexyl, propylcyclohexyl, 2,3-difluorocyclobutyl, 3,4-difluoro-5-methylcycloheptyl radicals, alkenyl radicals having 2 to 8 carbon atoms, such as vinyl, allyl or butene-2-yl radicals,
- mononuclear aryl and haloaryl radicals having from 6 to 13 carbon atoms such as the phenyl, tolyl, xylyl, chlorophenyl, dichlorophenyl and trichlorophenyl radicals, and
- Cyanoalkyl radicals whose alkyl members have 2 to 3 carbon atoms such as ⁇ -cyanoethyl and ⁇ -cyanopropyl radicals.
- radicals R 11 and R 12 include alkyl radicals having 1 to 8 carbon atoms such as methyl, ethyl, propyl, butyl, hexyl and octyl, vinyl radicals, and phenyl radicals.
- substituted R 11 and R 12 radicals include 3,3,3-trilfluoro-propyl, chlorophenyl and betacyanoethyl radicals.
- radicals R 11 and R 12 are methyl radicals, the other radicals being generally phenyl and / or vinyl radicals.
- crosslinking agent (B) mention may be made of:
- R 14 which may be identical or different, represent alkyl radicals having 1 to 8 carbon atoms, such as the methyl, ethyl, propyl, butyl, pentyl or 2-ethylhexyl radicals, radicals; C 3 -C 6 oxyalkylenes, the symbol R 13 represents a saturated or unsaturated aliphatic hydrocarbon group, linear or branched, a saturated carbocyclic group
- Unsaturated and / or aromatic, monocyclic or polycyclic and k is 0 or 1;
- C 3 -C 6 alkoxyalkylene radicals mention may be made of the following radicals: CH 3 OCH 2 CH 2 -CH 3 OCH 2 CH (CH 3 ) -CH 3 OCH (CH 3 ) CH 2 -C 2 H 2 OCH 2 CH 2 CH 2 -
- R 13 represents a hydrocarbon radical C 1 -C including 0: 5 - alkyl radicals CRCI 0 such as methyl, ethyl, propyl, butyl, pentyl, 2-ethylhexyl, octyl, decyl,
- crosslinking agents (B) of formula (2) are products accessible on the silicone market; moreover their use in compositions hardening at room temperature is known; it appears in particular in the French patents FR-A-1,126,411, FR-A-1,179,969, FR-A-1,189,216, FR-ArI 198,749, FR-A-1,248,826, FR-A-1 314,649, FR-A-1,423,477, FR-A-1,432,799 and
- alkyltrialkoxysilanes, alkyl silicates and alkyl polysilicates are more particularly preferred, in which the organic radicals are alkyl radicals having from 1 to 4 carbon atoms.
- the alkyl silicates may be chosen from methyl silicate, ethyl silicate, isopropyl silicate, n-propyl silicate and polysilicates chosen from the products of partial hydrolysis of these silicates; they are polymers consisting of a large proportion of units of formula:
- R 14 O 3 SiO 1Z2, 3Z2 OSiO R 14, (R 14 O) 2 SiO 2 and Z 2 SiO 4/2; the symbol R 14 represents the methyl, ethyl, isopropyl and / or n-propyl radicals. To characterize them, their silica content is usually based on the determination of the hydrolysis product of a sample.
- crosslinking agents (B) which may be used include, in particular, the following silanes:
- CH2 CHSi (OCH3) 3 ;
- CH 2 CHSi (OCH 2 CH 2 OCH 3) 3 C 6 H 5 Si (OCH 3) 3; [CH 3 ] [OCH (CH 3 ) CH 2 OCH 3 ] If [OCH 3 ] 2
- crosslinking agent (B) mention may be made of ethyl polysilicate or n-propyl polysilicate. From 0.1 to 60 parts by weight of crosslinking agent of formula (2) is generally used for
- compositions according to the invention may further comprise reinforcing or semi-reinforcing fillers (C) or fillers which are preferably chosen from siliceous fillers.
- the reinforcing fillers are preferably chosen from combustion silicas and precipitated silicas. They have, in general, a specific surface area, measured according to the BET methods, of at least 50 m 2 / g, preferably greater than 70 m 2 / g, an average primary particles less than 0.1 ⁇ m (micrometer) and a bulk density of less than 200 g / liter.
- silicas can be incorporated as such or after being treated with organosilicon compounds usually used for this purpose.
- organosilicon compounds usually used for this purpose.
- these compounds are methylpolysiloxanes such as hexamethyldisiloxane, octamethyldisiloxane, octamethylcyclotetrasiloxane, methylpolysilazanes such as hexamethyldisilazane, hexamethylcyclotrisilazane, chlorosilanes such as dimethylchlorosilane, trimethylchlorosilane, methylvinyldichlorosilane, dimethylvinylchlorosilane, alkoxysilanes such as dimethyldimethoxysilane, dimethylvinylethoxysilane and trimethylmethoxysilane.
- the silicas can increase their starting weight up to a rate of
- the semi-reinforcing or tamping fillers have a particle diameter greater than 0.1 ⁇ m (micrometer) and are selected from ground quartz, calcined clays and diatomaceous earths.
- non-reactive linear polyorganosiloxane polymers may be introduced with the intention of acting on the physical characteristics of the compositions according to the invention and or on the mechanical properties of the elastomers resulting from the hardening of these compositions.
- non-reactive linear polyorganosiloxane polymers (E) are well known; they more particularly include: ⁇ , ⁇ -bis (triorganosiloxy) diorganopolysiloxane polymers having viscosities of at least 10 mPa.s at 25 ° C., formed essentially of diorganosiloxy units and at most 1% of monoorganosiloxy and / or siloxy units , the organic radicals bonded to the silicon atoms being chosen from methyl, vinyl and phenyl radicals, at least 60% of these radicals being
- 25 organic radicals being methyl radicals and 10% at most being vinyl radicals.
- the viscosity of these polymers can reach several tens of millions of mPa.s at 25 ° C; they therefore include oils with fluid to viscous appearance and hard soft gums. They are prepared according to the usual techniques described more precisely in the French patents FR-A-978 058, FR-A-1 025 150, FR-A-1 108 764, FR-A-1 370 884.
- the ⁇ , ⁇ -bis (trimethylsiloxy) dimethylpolysiloxane oils having a viscosity ranging from 10 mPa.s to 1000 mPa.s at 25 ° C.
- These polymers which act as plasticizers can be introduced in a proportion of at most 70 parts, preferably from 5 to 20 parts, per 100 parts of the ⁇ , ⁇ -dihydroxydiorganopolysiloxane reactive polymers (A).
- compositions according to the invention may further advantageously comprise at least one silicone resin (G).
- These silicone resins are branched organopolysiloxane polymers well known and commercially available. They have, per molecule, at least two different units chosen from those of formula (pattern D), R "SiO 3/2 (T unit) and SiO 4/2 (Q unit) .
- the radicals R '" are identical or different and are chosen from linear or branched alkyl radicals, vinyl, phenyl and trifluoro-3 radicals. , 3,3 propyl.
- the alkyl radicals have from 1 to 6 carbon atoms inclusive.
- alkyl radicals R methyl, ethyl, isopropyl, tert-butyl and n-hexyl radicals.
- These resins are preferably hydroxylated and in this case have a hydroxyl content by weight of between 5 and 500 meq / 100 g.
- resins examples include MQ resins, MDQ resins, TD resins and MDT resins.
- the elastomeric crosslinking of the polyorganosiloxane bases (by polycondensation reaction) which have just been described is carried out under the effect of the catalytic system (D) defined above.
- D catalytic system
- from 0.001 to 50 parts by weight, preferably from 0.05 to 15 parts by weight, of ingredient (D1), (D2) and (D3) are used per 100 parts of polymer (s).
- compositions crosslink at room temperature in the presence of water contained in the composition.
- each composition is produced in the form of a two-component system formed of two parts P1 and P2, intended to be brought into contact with one another to produce the composition.
- elastomer crosslinked by polycondensation is produced in the form of a two-component system formed of two parts P1 and P2, intended to be brought into contact with one another to produce the composition.
- the present invention relates to a precursor two-component system of the organopolysiloxane composition according to the invention characterized by:
- one of these parts comprises the catalytic system (D) as defined above and the agent or the crosslinking agents (B) while the other part is free from the abovementioned species and comprises:
- the two-component precursor system of the organopolysiloxane composition according to the invention is characterized in that:
- the part P1 comprises:
- (E) consisting of a linear homopolymer or copolymer whose molecule, monovalent organic substituents, identical or different from each other, bonded to the silicon atoms are selected from alkyl, cycoalkyl, alkenyl, aryl, alkylarylenes and arylalkylenes,
- crosslinking agent (B) chosen from the group consisting of: polyacoxysilanes, products resulting from the partial hydrolysis of a
- non-reactive linear polyorganosiloxane polymer (E) consisting of a linear homopolymer or copolymer of which, by molecule, the monovalent organic substituents, which are identical to or different from each other, bonded to the silicon are selected from alkyl, cyanoalkyl, alkenyl, aryl, alkylarylenes and arylalkylenes, and
- the two-component compositions according to the invention may be shaped, extruded or in particular molded in various forms, and then cured at room temperature to an elastomer.
- compositions according to the invention can be used for a variety of applications such as grouting and / or gluing in the building industry, the transport industry (examples: automotive, aerospace, rail, maritime and aeronautics). assembly of various materials (metals, plastics, natural and synthetic rubbers, wood, cardboard, polycarbonate, earthenware, brick, ceramics, glass, stone, concrete and 5 masonry elements), insulation of electrical conductors, encapsulation of electronic circuits and the preparation of molds for the manufacture of objects made of resins or synthetic foams. In addition, they are suitable for the formation of "in-situ” seals used in the automotive industry. These "in-situ” seals include several types, namely the "crushed” seals (so-called “seals”), the "shaped” seals (called “section profiles”) and the "injected” seals.
- crushed joints are formed following the application of a pasty bead of the compositions on the contact zone between two metal or plastic elements to be assembled.
- the pasty cord is first deposited on one of the elements and then the other element is immediately applied to the first; this results in crushing of the bead before it turns into an elastomer.
- This type of seals is intended for assemblies that should not be commonly dismantled O ' oil pan seals, timing case seals, etc.).
- compositions according to the invention harden rapidly at room temperature and even in a confined environment, it follows that "shaped" joints (and also other "in-situ” joints) resulting from the hardening of these compositions are self-regulating.
- adhesives and can be manufactured under very demanding industrial manufacturing conditions. They may, for example, be manufactured on the usual assembly lines of the automotive industry equipped with an automatic device for depositing the compositions. This automatic device often has a mixing head and a dispensing nozzle, which moves according to the profile of the joints to be manufactured.
- compositions manufactured and dispensed by means of this apparatus must have a curing time which is well adjusted in order firstly to prevent caking in the mixing head and secondly to obtain complete crosslinking after the end of the removal of the bead. pasty on the pieces to be grouted.
- These "shaped" seals are especially suitable for rocker cover seals, gearbox lids, distribution spacers and even oil seals.
- compositions according to the invention are also suitable for the formation of joints and / or glues with fast curing and self-adhering in other areas than the automobile. Thus they can be used to glue and grout plastic cabinets, to produce joints and / or glues:
- compositions according to the invention are particularly suitable for the formation of seals in a confined environment and capable of undergoing a heat treatment by the type of application, for example for seals used for bonding elements in household appliances such as cooking ovens. Indeed, in some applications, the seal must withstand temperatures greater than or equal to 100 0 C while maintaining a membership consistent with the needs of the application.
- Another subject of the invention relates to a self-adhesive seal and / or a glue prepared by curing at ambient temperature:
- the invention also relates to the use of a composition according to the invention or a two-component system according to the invention for the manufacture of self-adhesive seals and / or adhesives, in particular in the automotive industry or in the field of plastics. 'home appliance.
- the self-adhesive gasket and / or the adhesive retain a good adhesion after a heat treatment.
- the self-adhesive gasket and / or the adhesive retain, after a heat treatment of 220 ° C. for 3 days, a good adhesion, ie:
- the self-adhesive gasket and / or the adhesive retain, after a heat treatment, good mechanical properties, in particular after a heat treatment of 220 ° C. for 3 days, the mechanical properties are as follows:
- the invention also relates to the use of a composition according to the invention or of a two-component system according to the invention for the manufacture of self-adhering seals and / or adhesives exhibiting properties with resistance to oils which are useful in particular in the automobile industry.
- the self-adhesive gasket and / or the adhesive according to the invention retain, after aging at 150 ° C. in an oil for 30 days, good mechanical properties.
- a bi-component composition comprising the following P1 and P2 parts is prepared (the ingredients listed below are the constituents used for Examples 1 to 5 and Comparatives 1 to 4, the detail of each composition is given in Table 1). :
- - e water
- - f hydroxylated polydimethylsiloxane oil blocked at each of the chain ends by a unit (CH 3 ) 2 (OH) SiO 0, having a viscosity of 50 mPa.s at 25 ° C.
- a fuming silica having a BET surface area of 200 m 2 / g, treated with octamethylcyclotetrasiloxane
- C diatomaceous earth marketed under the trade name CELITE-350 ®
- Examples 1, 2, 3 and 5 To 100 parts by volume of the component P1, 10 parts by volume of the component P2 are added.
- Example 4 To 100 parts by weight of the component P1 is added 10 parts by weight of the component P2.
- Comparative 1 To 100 parts by weight of the component P1 is added 3 parts by weight of the component P2.
- Comparative 2 To 100 parts by weight of the P1 component is added 2.4 parts by weight of the P2 component.
- Comparative 3 and 4 To 100 parts by volume of the component P1, 10 parts by volume of the component P2 are added.
- Comparative 1 corresponds to an RTV-2 having a slow setting speed (assembly that can be handled after 24 hours) and self-adhering
- Comparative 2 corresponds to a RTV-2 with fast setting speed (assembly that can be handled after 10 minutes) but does not exhibiting no adhesion properties.
- Examples 1 to 4 have a substantially higher heat treatment adhesion than Comparatives 1 and 2.
- the RTVs of Examples 1, 2, 3 and 4 are easily extrudable (measurements with a static mixer 08 / 18, under 6 bar pressure, of the order of 20 g / min) and have the following good mechanical properties, even after heat treatment (preservation of the mechanical properties to more than 80%):
- DSA Shore A hardness
- Example 5 leads to a much lower reversion than the tin salts conventionally used in polycondensation, such as dialkyl tin dicarboxylates:
- Table 5 demonstrate the effectiveness of the catalytic system to obtain a RTV having a fast setting speed (assembly manipulable after a few minutes) and a good adhesion on various substrates (Table 3).
- PA 6-630FV polyamide-6,6 test tube containing 30% by weight of glass fiber
- PA 6-6 M25V15 polyamide-6,6 test tube containing 25% montmorillonite and 15% by weight of glass fibers. All these results show that the seals prepared from the composition according to the invention have superior properties, especially in terms of adhesion properties on many substrates (even after a long-term heat treatment), good performance. thermal (conservation of more than 80% of the mechanical properties after a long-term heat treatment), accompanied by a very fast kinetics (of the order of 10 minutes) compatible with industrial rates.
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Organic Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Silicon Polymers (AREA)
Abstract
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP06778593A EP1902113A1 (fr) | 2005-06-24 | 2006-06-14 | Composition organopolysiloxanique vulcanisable a temperature ambiante en elastomere auto-adherent |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR0506436 | 2005-06-24 | ||
FR0506436A FR2887553B1 (fr) | 2005-06-24 | 2005-06-24 | Composition organopolysiloxanique vulcanisable a temperature ambiante en elastomere auto-adherent |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2006136679A1 true WO2006136679A1 (fr) | 2006-12-28 |
Family
ID=34993016
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/FR2006/001344 WO2006136679A1 (fr) | 2005-06-24 | 2006-06-14 | Composition organopolysiloxanique vulcanisable a temperature ambiante en elastomere auto-adherent |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP1902113A1 (fr) |
KR (1) | KR20080015126A (fr) |
CN (1) | CN101287807A (fr) |
FR (1) | FR2887553B1 (fr) |
WO (1) | WO2006136679A1 (fr) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR3020067A1 (fr) * | 2014-04-18 | 2015-10-23 | Bluestar Silicones France | Procede d'enduction d'un composition silicone sur un support souple |
CN104558612B (zh) * | 2015-01-06 | 2018-06-22 | 浙江新安化工集团股份有限公司 | 一种烷氧基封端聚硅氧烷聚合物及其制备方法 |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4602078A (en) * | 1984-07-26 | 1986-07-22 | Dow Corning, Ltd. | Silicone elastomers and adhesion promoter therefor |
US4672003A (en) * | 1984-10-29 | 1987-06-09 | Rhone-Poulenc Specialites Chimiques | RTV organopolysiloxane compositions and self-adhesive elastomers therefrom |
US4749766A (en) * | 1986-01-09 | 1988-06-07 | Rhone-Poulenc Specialites Chimiques | Organotin curing catalyst for vulcanizable organopolysiloxanes |
US4996112A (en) * | 1988-04-07 | 1991-02-26 | Rhone-Poulenc Chimie | Storage-stable organopolysiloxane compositions moisture-curable into elastomeric state |
EP0735086A2 (fr) * | 1995-03-31 | 1996-10-02 | General Electric Company | Compositions d'étanchéité monocomposantes à base de silicone "RTV" réticulable par réaction des groupes alcoxy |
FR2864096A1 (fr) * | 2003-12-23 | 2005-06-24 | Rhodia Chimie Sa | Composition polyorganosiloxane monocomposante reticulant en elastomere silicone |
-
2005
- 2005-06-24 FR FR0506436A patent/FR2887553B1/fr not_active Expired - Fee Related
-
2006
- 2006-06-14 CN CNA2006800226548A patent/CN101287807A/zh active Pending
- 2006-06-14 WO PCT/FR2006/001344 patent/WO2006136679A1/fr active Application Filing
- 2006-06-14 KR KR1020077030207A patent/KR20080015126A/ko not_active Application Discontinuation
- 2006-06-14 EP EP06778593A patent/EP1902113A1/fr not_active Withdrawn
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4602078A (en) * | 1984-07-26 | 1986-07-22 | Dow Corning, Ltd. | Silicone elastomers and adhesion promoter therefor |
US4672003A (en) * | 1984-10-29 | 1987-06-09 | Rhone-Poulenc Specialites Chimiques | RTV organopolysiloxane compositions and self-adhesive elastomers therefrom |
US4749766A (en) * | 1986-01-09 | 1988-06-07 | Rhone-Poulenc Specialites Chimiques | Organotin curing catalyst for vulcanizable organopolysiloxanes |
US4996112A (en) * | 1988-04-07 | 1991-02-26 | Rhone-Poulenc Chimie | Storage-stable organopolysiloxane compositions moisture-curable into elastomeric state |
EP0735086A2 (fr) * | 1995-03-31 | 1996-10-02 | General Electric Company | Compositions d'étanchéité monocomposantes à base de silicone "RTV" réticulable par réaction des groupes alcoxy |
FR2864096A1 (fr) * | 2003-12-23 | 2005-06-24 | Rhodia Chimie Sa | Composition polyorganosiloxane monocomposante reticulant en elastomere silicone |
Also Published As
Publication number | Publication date |
---|---|
KR20080015126A (ko) | 2008-02-18 |
EP1902113A1 (fr) | 2008-03-26 |
FR2887553A1 (fr) | 2006-12-29 |
CN101287807A (zh) | 2008-10-15 |
FR2887553B1 (fr) | 2007-10-12 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
WO2006136678A2 (fr) | Utilisation d'une composition organopolysiloxanique vulcanisable des la temperature ambiante pour former un elastomere auto adherent | |
EP2367867B1 (fr) | Composes a structure guanidine et leurs utilisations comme catalyseurs de polycondensation d'organopolysiloxanes | |
EP2268743B1 (fr) | Composes a structure guanidine et leurs utilisations comme catalyseurs de polycondensation d'organopolysiloxanes | |
EP0021859B1 (fr) | Compositions organopolysiloxaniques durcissant en élastomères dès la température ambiante en présence d'eau | |
EP2222772B1 (fr) | Composition organopolyseloxanique vulcanisable a temperature ambiante en elastomere et nouveaux catalyseurs de polycondensation d'organopolysiloxanes | |
EP0117772B1 (fr) | Compositions organopolysiloxaniques contenant des polyacyloxysilanes et durcissant très rapidement en élastomères en présence d'accélérateur du type phosphate | |
EP2222688B1 (fr) | Composes a structure guanidine et leurs utilisations comme catalyseurs de polycondensation d'organopolysiloxanes | |
EP2222773B1 (fr) | Composition organopolyseloxanique vulcanisable a temperature ambiante en elastomere et nouveaux catalyseurs de polycondensation d'organopolysiloxanes | |
EP2440628B1 (fr) | Procede d'etancheification et d'assemblage de composants d'un groupe moto-propulseur | |
EP0264336B1 (fr) | Composition organopolysiloxane comportant un accelerateur de durcissement | |
FR2621922A1 (fr) | Composition organopolysiloxane a fonction acyloxy comportant un hydrogel comme agent de durcissement | |
WO2006136679A1 (fr) | Composition organopolysiloxanique vulcanisable a temperature ambiante en elastomere auto-adherent | |
FR2621923A1 (fr) | Composition organopolysiloxane a fonction cetiminoxy comportant un hydrogel comme agent de durcissement | |
EP0406135A1 (fr) | Composition organopolysiloxane monocomposante à stabilité au stockage ameliorée | |
EP2440616B1 (fr) | Procede d'etancheification et d'assemblage de composants d'un groupe moto-propulseur |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
WWE | Wipo information: entry into national phase |
Ref document number: 200680022654.8 Country of ref document: CN |
|
121 | Ep: the epo has been informed by wipo that ep was designated in this application | ||
WWE | Wipo information: entry into national phase |
Ref document number: 1020077030207 Country of ref document: KR |
|
NENP | Non-entry into the national phase |
Ref country code: DE |
|
WWE | Wipo information: entry into national phase |
Ref document number: 2008517527 Country of ref document: JP |
|
WWW | Wipo information: withdrawn in national office |
Ref document number: DE |
|
WWE | Wipo information: entry into national phase |
Ref document number: 2006778593 Country of ref document: EP |
|
WWP | Wipo information: published in national office |
Ref document number: 2006778593 Country of ref document: EP |