EP2222626A1 - Composition organopolysiloxanique vulcanisable a temperature ambiante en elastomere et nouveaux catalyseurs de polycondensation d'organopolysiloxanes - Google Patents

Composition organopolysiloxanique vulcanisable a temperature ambiante en elastomere et nouveaux catalyseurs de polycondensation d'organopolysiloxanes

Info

Publication number
EP2222626A1
EP2222626A1 EP08873016A EP08873016A EP2222626A1 EP 2222626 A1 EP2222626 A1 EP 2222626A1 EP 08873016 A EP08873016 A EP 08873016A EP 08873016 A EP08873016 A EP 08873016A EP 2222626 A1 EP2222626 A1 EP 2222626A1
Authority
EP
European Patent Office
Prior art keywords
catalyst
polycondensation
anion
elastomer
crosslinking
Prior art date
Legal status (The legal status 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 status listed.)
Ceased
Application number
EP08873016A
Other languages
German (de)
English (en)
French (fr)
Inventor
Christian Maliverney
Laurent Saint-Jalmes
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Elkem Silicones France SAS
Original Assignee
Bluestar Silicones France SAS
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
Priority claimed from FR0708924A external-priority patent/FR2925516A1/fr
Application filed by Bluestar Silicones France SAS filed Critical Bluestar Silicones France SAS
Priority to EP18168305.3A priority Critical patent/EP3385304B1/fr
Publication of EP2222626A1 publication Critical patent/EP2222626A1/fr
Ceased legal-status Critical Current

Links

Classifications

    • 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
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C49/00—Ketones; Ketenes; Dimeric ketenes; Ketonic chelates
    • C07C49/92—Ketonic chelates
    • 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
    • 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

Definitions

  • the present invention relates to an organopolysiloxane composition that can be vulcanized from room temperature to a polycondensation-crosslinking elastomer and does not contain alkyltin catalysts which have toxicity problems.
  • the invention also relates to novel polycondensation catalysts in silicone chemistry and their use as catalysts for the polycondensation reaction of organopolysiloxanes.
  • the formulations of the polycondensation-crosslinking elastomers generally involve a silicone oil, generally a hydroxyl-terminated polydimethylsiloxane, optionally prefunctionalized with a silane so as to have alkoxy ends, a crosslinking agent, a polycondensation catalyst, conventionally a tin salt or an alkyl titanate, a reinforcing filler and any other additives such as fillers, adhesion promoters, dyes, biocides, etc.
  • organopolysiloxane compositions vulcanizable at room temperature are well known and are classified into 2 distinct groups: single-component compositions (RTV-I) and two-component compositions (RTV-2).
  • single component compositions crosslink when exposed to moisture in the air, i.e. they can not crosslink in a confined environment.
  • the single-component silicone compositions used as mastics or adhesives cold-crosslink following a mechanism for hydrolysis of reactive functions of the acetoxysilane, cetimoxysilane, alkoxysilane, etc. type, followed by condensation reactions between formed silanol groups and other residual reactive functions. Hydrolysis is usually carried out by means of the water vapor diffusing into the material from the surface exposed to the atmosphere. Generally, the kinetics of the polycondensation reactions is extremely slow; these reactions are catalyzed by a suitable catalyst.
  • catalysts As catalysts are used, it is most often used catalysts based on tin, titanium, an amine or compositions of these catalysts.
  • the catalysts based on tin see in particular FR-A-2,557,582) and titanium (see in particular FR-A-2,786,497) are catalysts having a good efficiency.
  • 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.
  • These two-component compositions are well known and are described in particular in the work of Walter NoIl "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
  • the condensation catalyst is based on an organic tin compound.
  • tin catalysts have already been proposed as a crosslinking catalyst for these RTV-2.
  • the most widely used compounds are alkyltin carboxylates such as tributyltain monooleate or dialkyltin dicarboxylates such as dibutyltin dilaurate, dibutyltin diacetate or dimethyltin dilaurate (see the book “Chemistry and Technology of NoIl”). silicones "page 337, Academy Press, 1968 - 2nd edition or patents EP 147 323 or EP 235 049).
  • Titanium catalysts also widely used in RTV-I, however, have a major disadvantage: they have slower kinetics than tin catalysts. In addition, these catalysts are not usable in RTV-2 due to gelling problems.
  • Another important aspect for a catalyst of the polycondensation reaction of the organopolysiloxanes is 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 curing. This time must be long enough to allow its use but short enough to obtain a manipulable molded object at the latest a few minutes or hours 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 can be handled (these times depend on the intended application, for example the molding or the manufacture of joints).
  • the catalyst must give the catalyzed mixture a spreading time that does not vary with the storage time.
  • the essential objective of the present invention is therefore to find new catalysts which both for the air humidity, crosslinking at the surface but also cross-linking as complete as possible.
  • Another essential objective of the present invention is to provide a catalyst that can be used both in the crosslinking of the mono- and bi-component elastomer compositions.
  • Another essential objective of the present invention is to propose a catalytic system which continues to meet both the conservation, implementation and crosslinking constraints of the two types of mono- and bi-component elastomer compositions.
  • an organopolysiloxane composition characterized in that it comprises on the one hand a silicone base B capable of being hardened by polycondensation reaction into a silicone elastomer. and on the other hand, a catalytically effective amount of at least one polycondensation catalyst which is a metal complex or salt A of formula (1): [Zn (L 1 ) (L 2 )] (1) wherein:
  • L 1 and L 2 are identical or different and represent a ligand which is a ⁇ -dicarbonylato anion or the enolate anion of a ⁇ -dicarbonyl compound of formula (2) or an acetylacetato anion derived from a ⁇ -dicarbonylato ketoester of the following formula (2): R 1 COCHR 2 COR 3 (2) 68
  • R 1 and R 2 can be connected to form a ring
  • complex or metal salt A includes any oligomeric form or the like of said complex or metal salt A.
  • inventive character of the invention is due to the judicious and advantageous selection of delimited associations of metal compounds A used as polycondensation catalyst.
  • This catalyst has the advantage of being liquid at ambient temperature (25 ° C.) and soluble in organic solvents, even in alkanes, and in silicone oils.
  • the ⁇ -dicarbonylato ligands L 1 and L 2 are ⁇ -diketonato anions derived from a ⁇ -diketone chosen from the group consisting of ⁇ -diketones: 2,4-hexanedione; 2,4-heptanedione; heptanedione-3,5; ethyl-3-2,4-pentanedione; methyl-5-hexanedione-2,4; octanedione-2,4; octanedione-3,5; dimethyl-5,5-hexanedione-2,4; methyl-6-2,4-heptanedione; 2,2-dimethyl-3,5-nonanedione; 2,6-dimethyl-3,5-heptanedione; 2-acetylcyclohexanone (Cyacac); 2,2,6,6-tetramethyl-3,5-
  • the ⁇ -dicarbonylato ligands L 1 and L 2 are ⁇ -ketoesterat anions chosen from the group consisting of anions derived from the following compounds: methyl, ethyl, n-propyl, isopropyl, n butyl, sec-butyl, isobutyl, tert-butyl, isopentyl, n-hexyl, n-octyl, 1-methylheptyl, n-nonyl, n-decyl and n-dodecyl acetylacetic acid.
  • the invention also relates to the novel compounds of formulas (5) and (6) below:
  • Another subject of the invention consists in using, as catalyst, the polycondensation reaction of organopolysiloxanes of the complexes or metal salts A according to the invention and as described above.
  • the amount of the polycondensation catalyst according to the invention is between 0.1 and 10% by weight of the total mass, preferably between 0.5 and 5%, whether it is a mono preparation or bi-components.
  • These silicone bases may be single-component, that is to say, packaged in a single package, and storage stable in the absence of moisture, curable in the presence of moisture, in particular moisture brought by the ambient air or water generated within the base during its use.
  • two-component bases can be used, that is to say packed in two packages, which harden as soon as the polycondensation catalyst is incorporated. according to the invention. They are conditioned after incorporation of the catalyst into two separate fractions, one of the fractions being able to contain, for example, only the catalyst according to the invention or a mixture with the crosslinking agent.
  • the polyorganosiloxane oil C is preferably an ⁇ , ⁇ -dihydroxypolydiorganosiloxane polymer having a viscosity of between 50 and 5,000,000 mPa.s at 25 ° C. and the crosslinking agent D is preferably an organosilicon compound bearing more than two groups. hydrolyzable bonded to silicon atoms per molecule.
  • the polyorganosiloxane oil C may also be functionalized at its ends by hydrolysable radicals obtained by condensation of a precursor bearing hydroxyl functional groups with a cross-linking silane bearing hydrolysable radicals.
  • crosslinking agent (D) mention may be made of: the silanes of the following general formula: in which the symbols R 2 , which are identical or different, represent alkyl radicals having from 1 to
  • alkoxy-C 3 -C alkoxy radicals mention may be made of the following radicals: CH 3 OCH 2 CH 2 -
  • R 1 represents a hydrocarbon radical Ci-Ci 0 encompassing:
  • vinyl radicals such as the phenyl, tolyl and xylyl radicals.
  • the crosslinking agents D are products that are 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-AI 126 411, FR-AI 179 969, FR-AI 189 216, FR-AI 198 749, FR-AI 248 826, FR-AI 314 649, FR-AI 423 477, FR-Al 432 799 and FR-A-2 067 636.
  • 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.
  • crosslinking agents D which can be used, mention is made more particularly of the following silanes:
  • linear non-reactive polyorganosiloxane polymers (G) may be introduced in order to act on the physical characteristics of the compositions in accordance with the invention and / or on the mechanical properties of the elastomers resulting from the hardening of these compositions.
  • non-reactive linear polyorganosiloxane polymers are well known; they more particularly include: ⁇ , ⁇ -bis (triorganosiloxy) diorganopolysiloxane polymers with 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 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-AI 025 150, FR-AI 108 764 and FR-AI 370 884. Preferably, the ⁇ , ⁇ -bis oils are used. (Trimethylsiloxy) dimethylpolysiloxanes with 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 polyorganosiloxane C oil capable of crosslinking by polycondensation.
  • compositions according to the invention may also advantageously comprise at least one silicone resin (H).
  • 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 R 111 SSiO 1 Q (unit M), Rr 2 SiO 2Z 2 (unit D), R 111 SiO 372 (unit T) and SiO 4/2 (unit Q).
  • the radicals R '" are identical or different and are chosen from linear or branched alkyl radicals, vinyl, phenyl and 3,3,3-trifluoropropyl radicals.
  • the alkyl radicals preferably contain from 1 to 6 carbon atoms, inclusive.
  • alkyl radicals R of methyl, ethyl, isopropyl, tert-butyl and n-hexyl radicals, these resins preferably being hydroxylated and in this case having 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.
  • compositions in accordance with the invention it is necessary, in the case of single-component compositions, to use an apparatus which makes it possible to intimately mix, with the exclusion of moisture, with and without heat input, the various constituents to which the additives and additives mentioned above may be added. All these ingredients can be loaded into the apparatus in any order of introduction.
  • the mixtures can be heated to a temperature in the range 50- 180 0 C under atmospheric pressure or under reduced pressure to promote the departure of volatile materials.
  • compositions according to the invention that is to say undiluted, or in the form of dispersions in diluents, are stable storage in the absence of water and harden as soon as possible. low temperatures (after starting solvents in the case of dispersions) in the presence of water to form elastomers.
  • compositions according to the invention can be used for multiple applications such as grouting and / or gluing in the building industry, the transport industry (examples: automotive, aerospace, rail, maritime and aeronautics). assembly of the most diverse materials (metals, plastics, natural and synthetic rubbers, wood, cardboard, polycarbonate, faience, brick, ceramic, glass, stone, concrete and masonry), insulation of electrical conductors, encapsulation of electronic circuits and preparation of molds for the manufacture of resins or synthetic foams.
  • assembly of the most diverse materials metal, plastics, natural and synthetic rubbers, wood, cardboard, polycarbonate, faience, brick, ceramic, glass, stone, concrete and masonry
  • insulation of electrical conductors encapsulation of electronic circuits and preparation of molds for the manufacture of resins or synthetic foams.
  • oil (or oils) polyorganosiloxane (s) C may (s) crosslink by polycondensation to an elastomer
  • a catalyst of the polycondensation reaction which is the metal complex A according to the invention and as defined above.
  • a solution of 100 mmol of 97% sodium methylate (6.12 g) in 100 ml of isopropanol is concentrated by distillation of 20%, then 100 mmol of 95% isopropyl acetoacetate (15.93 g) are added and the solution is heated at 80 ° C. for 1 h to obtain a homogeneous orange solution.
  • a solution of zinc chloride (50 mmol, 7 g) in 50 ml of isopropanol is then added at 70 ° C. in 1 hour. The heating is maintained between 80 and 90 0 C for 3:30 and then the sodium chloride formed is filtered after cooling.
  • VTMO vinyltrimethoxysilane
  • test species is placed in contact with a short ⁇ , ⁇ -dihydroxylated polydimethylsiloxane oil QA equivalent to the OH content, viscosity of 100 mPa.s, oil 48V100), then a crosslinking agent, ethyl silicate is added (1 equivalent / OH), or the same volume of ethyl silicate called "advanced", that is to say a mixture of ethoxypolysiloxanes (in this case> léq / OH).
  • the mash used is prepared as follows: a mixture of 3464 g of ⁇ , ⁇ -dihydroxylated oil with a viscosity of 20000 centipoise containing 0.066% of OH, and 120 g of vinyltrimethoxysilane with stirring is added. g of a 2% by weight solution of lithium hydroxide in methanol, and then after 5 minutes, 400 g of pyrogenic silica AE55 are added. The mixture is devolatilized under vacuum and then stored away from moisture.
  • the symbol ">” corresponds to the hardness values measured on the top of the pion and the symbol “ ⁇ ” corresponds to the hardness values measured on the lower part of the pion, less exposed to ambient air. that the upper part
  • the working time with the new catalyst (6) according to the invention is a little longer than in the case of the tin catalyst allowing a good flexibility of use for an application of RTV2 type.

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  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Silicon Polymers (AREA)
  • Compositions Of Macromolecular Compounds (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
EP08873016A 2007-12-20 2008-12-18 Composition organopolysiloxanique vulcanisable a temperature ambiante en elastomere et nouveaux catalyseurs de polycondensation d'organopolysiloxanes Ceased EP2222626A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP18168305.3A EP3385304B1 (fr) 2007-12-20 2008-12-18 Composition organopolysiloxane durcissable a temperature ambiante en un elastomere

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FR0708924A FR2925516A1 (fr) 2007-12-20 2007-12-20 Composition organopolysiloxanique vulcanisable a temperature ambiante en elastomere et nouveaux catalyseurs de polycondensation d'organopolysiloxanes.
FR0804801 2008-09-02
PCT/FR2008/001768 WO2009106718A1 (fr) 2007-12-20 2008-12-18 Composition organopolysiloxanique vulcanisable a temperature ambiante en elastomere et nouveaux catalyseurs de polycondensation d'organopolysiloxanes

Related Child Applications (1)

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EP18168305.3A Division EP3385304B1 (fr) 2007-12-20 2008-12-18 Composition organopolysiloxane durcissable a temperature ambiante en un elastomere

Publications (1)

Publication Number Publication Date
EP2222626A1 true EP2222626A1 (fr) 2010-09-01

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EP18168305.3A Active EP3385304B1 (fr) 2007-12-20 2008-12-18 Composition organopolysiloxane durcissable a temperature ambiante en un elastomere
EP08873016A Ceased EP2222626A1 (fr) 2007-12-20 2008-12-18 Composition organopolysiloxanique vulcanisable a temperature ambiante en elastomere et nouveaux catalyseurs de polycondensation d'organopolysiloxanes

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Country Status (6)

Country Link
US (1) US8835590B2 (ko)
EP (2) EP3385304B1 (ko)
JP (3) JP2011506738A (ko)
KR (2) KR20100087227A (ko)
CN (2) CN101932546A (ko)
WO (1) WO2009106718A1 (ko)

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WO2017220871A1 (fr) 2016-06-21 2017-12-28 Bluestar Silicones France Sas Procédé de lutte contre l'apparition de brouillard dans un dispositif à cylindres lors de l'enduction de supports flexibles avec une composition silicone liquide réticulable
WO2019220065A2 (fr) 2018-05-18 2019-11-21 Elkem Silicones France Sas Procede de production de materiaux silicones poreux
WO2020127818A1 (fr) 2018-12-20 2020-06-25 Elkem Silicones France Sas Procédé de lutte contre l'apparition de brouillard dans un dispositif a cylindres lors de l'enduction de supports flexibles avec une composition silicone liquide réticulable
WO2022023675A1 (fr) 2020-07-29 2022-02-03 Elkem Silicones France Sas Composition silicone réticulable en élastomère comprenant un additif de tenue thermique
WO2022129348A1 (fr) 2020-12-16 2022-06-23 Elkem Silicones France Sas Composition silicone biocide applicable sur des surfaces

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WO2022129348A1 (fr) 2020-12-16 2022-06-23 Elkem Silicones France Sas Composition silicone biocide applicable sur des surfaces

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US8835590B2 (en) 2014-09-16
JP5770151B2 (ja) 2015-08-26
JP2011506738A (ja) 2011-03-03
JP2013064147A (ja) 2013-04-11
JP2015083584A (ja) 2015-04-30
KR20130018366A (ko) 2013-02-20
KR20100087227A (ko) 2010-08-03
CN105440288A (zh) 2016-03-30
CN101932546A (zh) 2010-12-29
KR101443544B1 (ko) 2014-09-22
US20110046304A1 (en) 2011-02-24
EP3385304A1 (fr) 2018-10-10
EP3385304B1 (fr) 2020-07-15

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