EP4298180A1 - Mastic pour conditions climatiques extremes de temperature et d'humidite - Google Patents
Mastic pour conditions climatiques extremes de temperature et d'humiditeInfo
- Publication number
- EP4298180A1 EP4298180A1 EP22710694.5A EP22710694A EP4298180A1 EP 4298180 A1 EP4298180 A1 EP 4298180A1 EP 22710694 A EP22710694 A EP 22710694A EP 4298180 A1 EP4298180 A1 EP 4298180A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- carbon atoms
- radical
- branched
- mastic
- formula
- 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.)
- Pending
Links
Classifications
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- 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
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- 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
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/08—Processes
- C08G18/10—Prepolymer processes involving reaction of isocyanates or isothiocyanates with compounds having active hydrogen in a first reaction step
-
- 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
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/08—Processes
- C08G18/16—Catalysts
- C08G18/22—Catalysts containing metal compounds
- C08G18/222—Catalysts containing metal compounds metal compounds not provided for in groups C08G18/225 - C08G18/26
-
- 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
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/08—Processes
- C08G18/16—Catalysts
- C08G18/22—Catalysts containing metal compounds
- C08G18/24—Catalysts containing metal compounds of tin
- C08G18/244—Catalysts containing metal compounds of tin tin salts of carboxylic acids
- C08G18/246—Catalysts containing metal compounds of tin tin salts of carboxylic acids containing also tin-carbon 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
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
- C08G18/40—High-molecular-weight compounds
- C08G18/48—Polyethers
- C08G18/4825—Polyethers containing two hydroxy 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
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/70—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the isocyanates or isothiocyanates used
- C08G18/72—Polyisocyanates or polyisothiocyanates
- C08G18/74—Polyisocyanates or polyisothiocyanates cyclic
- C08G18/75—Polyisocyanates or polyisothiocyanates cyclic cycloaliphatic
- C08G18/751—Polyisocyanates or polyisothiocyanates cyclic cycloaliphatic containing only one cycloaliphatic ring
- C08G18/752—Polyisocyanates or polyisothiocyanates cyclic cycloaliphatic containing only one cycloaliphatic ring containing at least one isocyanate or isothiocyanate group linked to the cycloaliphatic ring by means of an aliphatic group
- C08G18/753—Polyisocyanates or polyisothiocyanates cyclic cycloaliphatic containing only one cycloaliphatic ring containing at least one isocyanate or isothiocyanate group linked to the cycloaliphatic ring by means of an aliphatic group containing one isocyanate or isothiocyanate group linked to the cycloaliphatic ring by means of an aliphatic group having a primary carbon atom next to the isocyanate or isothiocyanate group
- C08G18/755—Polyisocyanates or polyisothiocyanates cyclic cycloaliphatic containing only one cycloaliphatic ring containing at least one isocyanate or isothiocyanate group linked to the cycloaliphatic ring by means of an aliphatic group containing one isocyanate or isothiocyanate group linked to the cycloaliphatic ring by means of an aliphatic group having a primary carbon atom next to the isocyanate or isothiocyanate group and at least one isocyanate or isothiocyanate group linked to a secondary carbon atom of the cycloaliphatic ring, e.g. isophorone diisocyanate
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- 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
- C09J11/00—Features of adhesives not provided for in group C09J9/00, e.g. additives
- C09J11/02—Non-macromolecular additives
- C09J11/04—Non-macromolecular additives inorganic
-
- 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
- C09J175/00—Adhesives based on polyureas or polyurethanes; Adhesives based on derivatives of such polymers
- C09J175/04—Polyurethanes
- C09J175/08—Polyurethanes from polyethers
Definitions
- DESCRIPTION TITLE SEALANT FOR EXTREME CLIMATIC CONDITIONS OF TEMPERATURE AND HUMIDITY
- the subject of the present invention is a sealant composition particularly suitable for obtaining assemblies likely to be exposed, over a long period, to extreme climatic conditions of temperature and humidity and/or in contact with water, with a view in particular to implementation in the field of construction and the manufacture of vehicles such as trains, metros or buses.
- the invention also relates to the use of said composition, as well as a method implementing it. Sealants are widely used in many technical fields in order to assemble (or even to join or bond) 2 substrates which can be chosen from among the most diverse materials.
- sealants provide the assembly thus obtained with advantageous mechanical properties of solidity, elasticity and/or flexibility as well as fluid tightness.
- mastics are used, mention may in particular be made of the construction of buildings, the automobile, railway or aerospace industry, and the field of shipbuilding, such as that of pleasure boats.
- the mechanical properties of the assembly are determined by the cohesion of the adhesive joint, which is an intrinsic property of the latter, as well as by the adhesion of said joint to the surface of each of the 2 substrates, which depends on the properties of the interface. corresponding.
- sealants are commonly used because of their excellent water and humidity tightness, for the assembly of the hull and the deck, for the construction of bulkheads internal for the fitting out of the living spaces on board, for the assembly of the furniture.
- the substrates used are, in particular, often based on wood (varnished or raw), resins such as a polyester, an epoxy, a polymethyl methacrylate (or PMMA) or a poly(acrylonitrile-butadiene-styrene) ( or ABS), but can also be metallic (aluminum, stainless steel or galvanized or electrogalvanized steel).
- the external or environmental factors resulting from the conditions of implementation of the assembly are essential parameters to be considered for the maintenance in the time of the advantageous mechanical properties of the mastic, in particular of cohesion of the adhesive joint and of its adhesion to the surface of the two corresponding bonded substrates.
- the adhesive joint maintains its advantageous properties of cohesion and adhesion throughout the life of the boat, when the joint is caused to deform under the effect of the vibrations caused by navigation, and under the combined action of prolonged contact with water and humidity, and climatic conditions, in particular high temperatures, which can go up to 40°C, and even up to 100 °C.
- sealants on the market are usually in the form of compositions which include, in combination with a mineral filler, a moisture-curable prepolymer, the chemical structure of which is endowed with reactive groups, generally terminal, isocyanate or alkoxysilane .
- reactive groups generally terminal, isocyanate or alkoxysilane .
- Sealant compositions based on prepolymers with alkoxysilane endings have the advantage of being free of isocyanates, in particular diisocyanate monomers. These compositions therefore constitute an alternative, preferred from a toxicological point of view, to compositions based on polyurethane with isocyanate endings.
- the crosslinking reaction of these silylated mastics occurs, in the presence of humidity, by hydrolysis of the alkoxysilane groups carried by the prepolymer, then their condensation to form a siloxane bond (–Si-O-Si-) which unites the chains of prepolymers in a polymer forming a solid three-dimensional network.
- a subject of the present invention is thus a mastic composition
- a mastic composition comprising, on the basis of its total weight: - from 20 to 45% by weight of a silylated polymer (A); - from 30 to 55% by weight of a filler (B); and - from 0.05 to 5% by weight of an antioxidant composition (C) consisting, based on the total number of moles of the compounds present in the composition (C): - from 20 to 100% by mole of a secondary diarylamine (C1) of formula (1), (1') or (1''): in which: - X1, X2, X3 and X4, identical or different, each represent a hydrogen atom or a radical having from 1 to 20 carbon atoms and chosen from alkyl, arylalkyl, aryl, and alkylaryl; X1 and X2 or X3 and X4 can also be respectively engaged in a cycle; - X5 represents an oxygen or sulfur atom, or a divalent radical
- the invention relates to a putty composition
- a putty composition comprising, based on its total weight: - from 20 to 45% by weight of a silylated polymer (A); - from 30 to 55% by weight of a filler (B); and - from 0.05 to 5% by weight of an antioxidant composition (C) consisting of: - a secondary diarylamine (C1) of formula (1), (1') or (1''), such as defined above; and - a hindered phenol (C2) of formula (2) as defined above.
- an antioxidant composition consisting of: - a secondary diarylamine (C1) of formula (1), (1') or (1''), such as defined above; and - a hindered phenol (C2) of formula (2) as defined above.
- the incorporation of the antioxidant compositions (C) in the mastic compositions according to the invention leads, surprisingly, after crosslinking of the mastic, to an adhesive joint of which both the mechanical properties (in particular of solidity) , that the adhesion to different substrates, are maintained, and even often improved, when said seal is implemented over a long period of time and in an environment characterized by high humidity, up to 100% relative humidity , and by a high temperature, which can go up to 40°C, and even up to 100°C.
- the antioxidant composition (C) consists of a mixture of secondary diarylamine (C1) and hindered phenol (C2).
- Silylated polymer (A) within the meaning of the present invention, the term “silylated polymer” means a polymer comprising at least one alkoxysilane group.
- the silylated polymer (A) comprising at least one alkoxysilane group is a polymer comprising at least one, preferably at least two groups of formula (I): -Si(R4) p (OR5) 3-p (I) in which: - R4 represents a linear or branched alkyl radical comprising from 1 to 4 carbon atoms, with the possibility that when there are several R4 radicals, the latter are identical or different; - R5 represents a linear or branched alkyl radical comprising from 1 to 4 carbon atoms, with the possibility that when there are several R5 radicals, the latter are identical or different, with the possibility that two OR5 groups may be involved in the same cycle ; and - p is an integer equal to 0, 1 or 2, preferably equal to 0 or 1.
- the silylated polymer as defined above comprises at least one crosslinkable alkoxysilane group.
- the crosslinkable alkoxysilane group is preferably positioned at the end of said polymer. A positioning in the middle of the chain is however not excluded.
- the silylated polymer (A) is generally in the form of a more or less viscous liquid.
- the silylated polymer has a viscosity ranging from 10 to 200 Pa.s, preferably ranging from 20 to 175 Pa.s, said viscosity being for example measured according to a method of the Brookfield type at 23° C. and 50% of relative humidity (S28 needle).
- the silylated polymer (A) preferably comprises two groups of formula (I), but it can also comprise from three to six groups of formula (I).
- the silylated polymer(s) (A) have an average molar mass ranging from 500 to 50,000 g/mol, more preferably ranging from 700 to 20,000 g/mol.
- the molar mass of the polymers can be measured by methods well known to those skilled in the art, for example by NMR and steric exclusion chromatography using standards of the polystyrene type.
- the silylated polymer (A) corresponds to one of the formulas (II), (III) or (IV): in which: - R4, R5 and p have the same meaning as in formula (I) described above, - P represents a saturated or unsaturated, linear or branched polymeric radical optionally comprising one or more heteroatoms, such as oxygen, nitrogen , sulfur, silicon, and preferably having a number molar mass ranging from 100 g/mol to 48600 g/mol, more particularly from 300 g/mol to 18600 g/mol or even from 500 g/mol to 12600 g/mol , - R1 represents a divalent hydrocarbon radical comprising from 5 to 15 carbon atoms which may be aromatic or aliphatic, linear, branched or cyclic, - R3 represents a linear or branched divalent alkylene radical comprising from 1 to 6 carbon atoms, preferably from 1 to 3 carbon atoms, - X represents a divalent
- P represents a polymeric radical chosen in a nonlimiting manner from polyethers, polycarbonates, polyesters, polyolefins, polyacrylates, polyether polyurethanes, polyester polyurethanes, polyolefin polyurethanes, polyacrylate polyurethanes, polycarbonate polyurethanes, polyether/polyester polyurethanes with blocks.
- a polymeric radical chosen in a nonlimiting manner from polyethers, polycarbonates, polyesters, polyolefins, polyacrylates, polyether polyurethanes, polyester polyurethanes, polyolefin polyurethanes, polyacrylate polyurethanes, polycarbonate polyurethanes, polyether/polyester polyurethanes with blocks.
- P represents a polymeric radical chosen in a nonlimiting manner from polyethers, polycarbonates, polyesters, polyolefins, polyacrylates, polyether polyurethanes, polyester polyurethanes, polyolefin polyurethanes
- the silylated polymers are chosen from silylated polyurethanes, silylated polyethers, and mixtures thereof.
- the silylated polymer corresponds to one of the formulas (II'), (III') or (IV'): in which: - R1, R3, R4, R5, X, R7 and p have the same meaning as in formulas (II), (III) and (IV) described above, - R2 represents a divalent saturated hydrocarbon radical or unsaturated, linear or branched optionally comprising one or more heteroatoms, such as oxygen, nitrogen, sulfur, silicon, and preferably having a number molar mass ranging from 100 g/mol to 48600 g/mol, more particularly from 300 g/mol to 18600 g/mol or else from 500 g/mol to 12600 g/mol, - n is an integer greater than or equal to 0.
- the R2 radical comprises one or more heteroatoms
- said heteroatom(s) are not present at the end of the chain.
- the free valences of the divalent radical R2 linked to the neighboring oxygen atoms of the silylated polymer each come from a carbon atom.
- the main chain of the R2 radical is terminated by a carbon atom at each of the two ends, said carbon atom then having a free valence.
- the silylated polymers (A) are obtained from polyols chosen from polyether polyols, polyester polyols, polycarbonate polyols, polyacrylate polyols, polysiloxane polyols and polyolefin polyols and mixtures thereof, and preferably also from diols chosen from polyether diols, polyester diols, polycarbonate diols, polyacrylate diols, polysiloxane diols, polyolefin diols and mixtures thereof.
- such diols can be represented by the formula HO-R2-OH where R2 has the same meaning as in the formulas (II'), (III') or (IV').
- radicals of R2 type which may be present in formulas (II'), (III') or (IV')
- R1 is chosen from one of the following divalent radicals whose formulas below show the 2 free valences: a) the divalent radical derived from isophorone diisocyanate (IPDI): b) the divalent radical derived from dicyclohexylmethane diisocyanate (H12MDI) c) the divalent radical derived from toluene diisocyanate (TDI) d) divalent radicals derived from the 4,4' and 2,4'- isomers of diphenylmethane diisocyanate (MDI) e) the divalent radical derived from hexamethylene diisocyanate (HDI) -(CH2)6- f) the divalent radical derived from m-xylylene diisocyanate (m-XDI)
- the polymers of formula (II) or (II') can be obtained according to a process described in documents EP 2336208 and WO 2009/106699.
- polymers corresponding to formula (II) mention may be made of: - GENIOSIL® STP-E10 (available from WACKER-CHEMIE): polyether comprising two groups (I) of the dimethoxy type (n equal to 0, p equal to 1 and R4 and R5 represent a methyl group) having a number average molar mass of 8889 g/mol where R3 represents a methyl group; - GENIOSIL® STP-E30 (available from WACKER-CHEMIE): polyether comprising two groups (I) of the dimethoxy type (n equal to 0, p equal to 1 and R4 and R5 represent a methyl group) having an average molar mass in number of 14493 g/mol where R3 represents a methyl group; - SPUR+® 1050MM (available from MOMENTIVE): polyurethane
- the polymers of formula (III) or (III') can be obtained by hydrosilylation of polyether diallylether according to a process described for example in document EP 1829928.
- the polymers corresponding to formula (III) mention may be made of: - the MS SAX® 350 polymer (available from KANEKA) corresponding to a polyether comprising two groups (I) of the dimethoxy type (p equal to 1 and R4 and R5 represent a methyl group) having a number-average molar mass ranging from 14,000 at 16,000 g/mole; - the MS SAX® 260 polymer (available from KANEKA) corresponding to a polyether comprising two groups (I) of the dimethoxy type (p equal to 1, R4 and R5 represent a methyl group) having a number-average molar mass of 16,000 to 18,000 g/mol where R3 represents an ethyl group; - the polymer MS S303H (available from KANEKA) corresponding to a
- the polymers of formula (IV) or (IV') can for example be obtained by reaction of polyol(s) with one or more diisocyanates followed by a reaction with aminosilanes or mercaptosilanes.
- a process for preparing polymers of formula (IV) or (IV') is described in document EP 2583988. Those skilled in the art will be able to adapt the manufacturing process described in this document in the case of the use of different types of polyols.
- the silylated polymer (A) is a polymer of formula (IV') (often referred to by the term SPUR), and even more preferably a polymer of formula (IV') in which: - R1 is the divalent radical derived from isophorone diisocyanate (IPDI) - R2 is derived from a polypropylene glycol - X is the -NR7 radical.
- IPDI isophorone diisocyanate
- X is the -NR7 radical.
- the composition of the mastic according to the invention comprises from 25 to 40% by weight of the silylated polymer (A).
- the mastic composition according to the invention comprises from 30 to 55% by weight of one (or more) filler (B).
- the filler(s) that can be used in the putty composition according to the invention can be chosen from mineral fillers, organic fillers and mixtures of organic fillers and mineral fillers. .
- mineral filler(s) that can be used any mineral filler(s) usually used in the field of mastic compositions can be used.
- These fillers are in the form of particles of various geometry. They can be for example spherical, fibrous, or have an irregular shape. Preferably, clay, quartz, carbonate fillers are used.
- carbonated fillers such as alkali or alkaline-earth metal carbonates, and more preferentially calcium carbonate or chalk.
- These fillers can be untreated or treated, for example using an organic acid such as stearic acid, or a mixture of organic acids mainly consisting of stearic acid.
- organic acid such as stearic acid, or a mixture of organic acids mainly consisting of stearic acid.
- hollow mineral microspheres such as hollow glass microspheres, and more particularly those made of sodium and calcium borosilicate or of aluminosilicate.
- any organic filler(s) and in particular polymeric filler(s) usually used in the field of mastic compositions It is possible to use, for example, polyvinyl chloride (PVC), polyolefins, rubber, ethylene vinyl acetate (EVA), aramid fibers such as Kevlar®. It is also possible to use hollow microspheres made of expandable or non-expandable thermoplastic polymer. Mention may in particular be made of hollow vinylidene chloride/acrylonitrile microspheres. Preferably, PVC is used.
- the average particle size of the usable filler(s) is preferably less than or equal to 10 microns, more preferably less than or equal to 3 microns, in order to prevent their sedimentation in the adhesive mastic composition according to the invention during its storage.
- the average particle size is measured for a particle size distribution by volume and corresponding to 50% by volume of the sample of particles analyzed.
- the mean particle size corresponds to the median diameter (D50 or Dv50) which corresponds to the diameter such that 50% of the particles by volume have a size less than said diameter. In the present application, this value is expressed in micrometers and determined according to Standard NF ISO 13320-1 (1999) by laser diffraction on a MALVERN type device.
- the composition of the mastic according to the invention comprises from 35 to 50% by weight of filler (B).
- Composition of antioxidants (C) The composition of antioxidants (C) which is included in the mastic composition according to the invention consists, on the basis of the total number of moles of the compounds present in the composition (C) : - from 20 to 100% by mole of a secondary diarylamine (C1) of formula (1), (1') or (1''): in which: - X1, X2, X3 and X4, which are identical or different, each represent a hydrogen atom or a radical having from 1 to 20 carbon atoms and chosen from alkyl, arylalkyl, aryl and alkylaryl; X1 and X2 or X3 and X4 can also be respectively engaged in a cycle; - X5 represents an oxygen or sulfur atom, or a divalent radical -C(R)(R')- in which R and R', identical or different, are a hydrogen
- - X1, X2, X3 and X4 identical or different, each represent an atom of hydrogen or a radical having from 1 to 10 carbon atoms and chosen from alkyl, arylalkyl, aryl, and alkylaryl;
- - X2 and X4 each represent a hydrogen atom and X1 and X3 each represent an alkyl radical of 3 to 7 carbon atoms, substituted by a phenyl group, said alkyl radical being more preferably branched;
- - X2 and X4 each represent a hydrogen atom and X1 and X3 each represent an alkyl radical of 3 to 7 carbon atoms, more preferably branched, positioned para to the nitrogen atom, said alkyl radical being substituted by a phenyl group.
- the secondary diarylamine (C1) is of formula (1).
- the secondary diarylamine (C1) of formula (1) includes commonly commercially available antioxidants, among which there may be mentioned: - the compound corresponding to the formula below: which is available from BASF under the name IRGANOX® 5057; - the compound called 4,4'-bis(1,1-dimethylbenzyl)diphenylamine (Cas Number: 10081-67-1) which corresponds to the formula below: and which is available from OKA-TEC under the trade name OKABEST® AO 445 or also from ADDIVANT under the trade name NAUGARD® 445.
- the hindered phenol (C2) of formula ( 2) is such that: - X6 and X7 represent a branched alkyl radical comprising from 3 to 4 carbon atoms, and - X8 represents an alkyl radical comprising from 10 to 22 carbon atoms, even more preferentially from 16 to 22 carbon atoms , and comprising a carbonyloxy group.
- the hindered phenol (C2) of formula (2) includes antioxidants commonly available commercially, among which mention may be made of: - the compound called octadecyl ester of 3,5-di-tert-butyl-4-hydroxyphenylpropionic acid ( CAS Number: 2082-79-3), corresponding to the formula below: which is available from BASF under the name IRGANOX® 1076.
- the antioxidant composition (C) consists of 100% by mole of the secondary diarylamine (C1) of formula (1), (1 ') or (1'').
- the antioxidant composition (C) consists, on the basis of the total number of moles of (C1) and (C2), of 20 to 80% by mole of (C1) and of 20 to 80% by mole of (C2), preferably from 20 to 60% of (C1) and from 40 to 80% of (C2), even more preferably from 20 to 40% of (C1) and from 60 to 80 % of (C2), and finally advantageously from 20 to 30% of (C1) and from 70 to 80% of (C2).
- Composition (C) as defined above is included in the mastic composition according to the invention, in a proportion of 0.05 to 5% by weight, based on the total weight of said composition, and preferably in a proportion of 0 0.05 to 1%, and especially 0.1 to 0.5% by weight.
- Crosslinking catalyst (D) The mastic composition according to the invention can comprise, and preferably comprises, from 0.01 to 1% of a crosslinking catalyst (D), based on the total weight of said composition.
- Catalyst (D) can be any catalyst known to those skilled in the art for the condensation of silanol.
- Such catalysts may be made, as examples of such catalysts, of: organic derivatives of titanium such as titanium acetyl acetonate (commercially available under the name TYZOR® AA75 from the company DU PONT DE NEMOURS); - aluminum such as aluminum chelate (commercially available under the name K-KAT® 5218 from the company KING INDUSTRIES), - amines such as 1,8-diazabicyclo[5.4.0]undec-7-ene (DBU) or 1,5-diazabicyclo[4.3.0]non-5-ene (DBN), diethyl ether-2,2'-morpholine (DMDEE), 1,4-diazabicylo[2.2.2] octane (DABCO); - tin-based catalysts such as for example NEOSTANN® S-1 or TIB-KAT® 216 (available respectively from KANEKA or TIB CHEMICALS), or even DBTL (DiButylTin
- the mastic composition according to the invention comprises, in addition to the ingredients (A), (B) and (C), from 0% to 30% by weight, in particular from 0.5% to 30 % by weight, preferably from 10% to 27% by weight, of at least one additive chosen from plasticizers, adhesion promoters, moisture absorbers, rheological agents, solvents, pigments and stabilizers UV.
- the composition according to the invention may in particular comprise at least one plasticizer in an amount of 5% to 30% by weight, preferably 5% to 20% by weight, relative to the total weight of said composition.
- any plasticizer usually used in the field of mastic compositions can be used.
- the following are used: - diisodecyl phthalate (or DIDP), as marketed under the name PALATINOLTM DIDP by the company BASF, or even diisononyl phthalate (DINP), marketed by BASF under the name PALATINOL® N.
- composition according to the invention may also comprise up to 3% by weight of an adhesion promoter which may for example be an aminosilane, such as 3-aminopropyltrimethoxysilane (also called AMMO) or n-butyl-3- aminopropyltrimethoxysilane (commercially available under the name DYNASILAN® 1189).
- an adhesion promoter which may for example be an aminosilane, such as 3-aminopropyltrimethoxysilane (also called AMMO) or n-butyl-3- aminopropyltrimethoxysilane (commercially available under the name DYNASILAN® 1189).
- the composition according to the invention may also comprise up to 3% by weight of a humidity absorber which may be chosen from vinyltrimethoxysilane (VTMO), vinyltriethoxysilane (VTEO), alkoxyarylsilanes, such as GENIOSIL® XL 70 available from WACKER.
- VTMO vinyltrime
- composition according to the invention may also comprise from 1% to 30% by weight (relative to the total weight of the composition according to the invention) of a rheological agent, preferably from 5% to 20% by weight.
- a rheological agent preferably from 5% to 20% by weight.
- rheological agent any rheological agent usually used in the field of mastic compositions.
- one or more rheology agents chosen from thixotropic agents are used, and more preferably from: - PVC plastisols, corresponding to a suspension of PVC in a plasticizer miscible with PVC, obtained in situ by heating at temperatures ranging from 60°C to 80°C.
- These plastisols can be those described in particular in the work "Polyurethane Sealants", Robert M.
- the composition according to the invention may also comprise from 0% to 5% by weight of a solvent, preferably a solvent that is volatile at ambient temperature (temperature of the order of 23° C.).
- the volatile solvent can for example be chosen from alcohols that are volatile at room temperature, such as ethanol or isopropanol.
- the volatile solvent makes it possible, for example, to reduce the viscosity of the composition and to make the composition easier to apply.
- the volatile nature of the solvent allows the joint, obtained after hardening of the composition, to no longer contain any solvent. Thus, the solvent has for example no negative influence on the mechanical properties of the seal.
- the composition according to the invention may also comprise up to 3% by weight of a pigment chosen from organic or inorganic pigments.
- the pigment can be TiO 2 , in particular KRONOS® 2059 marketed by the company KRONOS.
- the composition according to the invention may also comprise UV stabilizers, among which mention may be made of benzotriazoles, benzophenones, and mixtures thereof. Mention may be made, for example, of the products TINUVIN® 328, TINUVINTM 770 or even TINUVINTM 765 marketed by BASF.
- TINUVINTM 765 is a UV stabilizer composition consisting of Bis(1,2,2,6,6-pentamethyl-4-piperidyl)sebacate and 1-(methyl)-8-(1,2,2,6,6- pentamethyl-4-piperidyl)sebacate (CAS Numbers: 41556-26-7 and 82919-37-7).
- the mastic composition according to the invention comprises: - 25 to 40% by weight of the silylated polymer (A); - 35 to 50% by weight of filler (B); and - 0.1 to 0.5% by weight of the antioxidant composition (C);
- the mastic composition according to the invention comprises, and preferably consists essentially of: - 25 to 40% by weight of the silylated polymer (A); - 35 to 50% by weight of filler (B); - 0.1 to 0.5% by weight of the antioxidant composition (C); - 0.02% to 0.5% by weight of the catalyst (D); - 5% to 20% by weight of a plasticizer; - 0.5% to 2% of an adhesion promoter; - 1% to 2% by weight of a humidity absorber; - 5% to 10% by weight of a rheological agent; - 1% to 3% of a solvent; - 1% to 3% of a pigment; and - 0.05% to 0.5% of a
- the composition that is the subject of the invention can be prepared by simply mixing its ingredients.
- the silylated polymer (A) can be mixed, in a suitable container, with liquid additives such as a plasticizer, a solvent, a humidity absorber and a UV stabilizer composition.
- liquid additives such as a plasticizer, a solvent, a humidity absorber and a UV stabilizer composition.
- solid additives such as a filler, a rheological agent, a pigment are dispersed in the preceding liquid mixture, for the necessary time.
- other liquid ingredients are added last, such as an adhesion promoter and the catalyst [MG1] .
- a subject of the present invention is also the use of the putty composition, as defined above, for bonding and sealing in the fields of building construction, the automobile, railway or aerospace industry, and shipbuilding, preferably for the construction of pleasure boats.
- the subject of the present invention is a process for assembling two substrates by bonding, comprising: the coating, on at least one of the two substrates to be assembled, of the putty composition, as defined above; then - the effective contacting of the two substrates.
- Suitable substrates are, for example, chosen from inorganic substrates such as concrete, metals or alloys (such as aluminum alloys, steel, non-ferrous metals and galvanized metals); or else from organic substrates such as wood (varnished or raw), resins such as a polyester, an epoxy, a polymethyl methacrylate (or PMMA) or a poly(acrylonitrile-butadiene-styrene) (or ABS).
- - DYNASYLAN® AMMO adhesion promoter available from EVONIK
- DYNASYLAN® VTMO moisture absorber consisting of vinyltrimethoxysilane, available from EVONIK.
- MAX rheological agent consisting of N,N'-ethane-1,2-diylbis(hexanamide), 12-hydroxy-N-[2-[(1-oxyhexyl)amino]ethyl] octadecanamide and N,N'-ethane-1,2-diylbis(12-hydroxyoctadecanamide), and which is available from ELEMENTIS.
- Example A preparation of the silylated polymer (A0) The polymer (A0) is prepared according to the following procedure in 2 stages.
- Acclaim® 12200 polyether polyol having an IOH of 9 to 11 mg KOH/g, and a number-average molecular weight of approximately 12,000, marketed by COVESTRO
- COVESTRO a dehydrating agent Ti
- BORCHER para-toluene sulfonyl isocyanate
- the IPDI is introduced, the mixture is mixed for 10 min and the catalyst K-KAT XK-664 (zinc carboxylate marketed by King Industry) is then introduced.
- the mixture is then heated to 70° C. for one hour with stirring.
- the NCO index is then checked, if the theoretical NCO index is not reached, the reaction time is extended by as many periods of 15 minutes as necessary.
- Dynasilan® 1189 n-butyl-3-aminopropyl-trimethoxysilane from EVONIK
- the mixture is stirred for 10 minutes.
- the reactor is then placed in cooling mode and the VTMO as well as the DINP (diisononyl phthalate) are added, the mixture is then kept under stirring for 20 minutes.
- a product consisting essentially of 85.53% by weight/weight of silylated polymer (A0) SPUR and 13.90% by weight/weight of plasticizer DINP is obtained.
- Example 1 (according to the invention): The putty composition listed in Table 1 below was prepared by mixing the ingredients according to the procedure indicated above. Ingredient content is given in % w/w. After its preparation, the composition is stored in a sealed cartridge, and then it is subjected to the following tests. [Table 1] 1. Measurement of the shear strength of an assembly made up of 2 substrates joined by the cross-linked mastic: 1.1. Preparation of an assembly specimen: 2 rectangular plates of the same substrate with dimensions: 100 mm ⁇ 25 mm ⁇ 2 mm are used. After cleaning the 2 plates with isopropanol, a rectangular bonding area of dimensions 12.5 mm x 25 mm is defined, by means of an adhesive tape, at the end of each plate.
- the mastic composition prepared above is applied, in an amount corresponding to a thickness of 2 mm. Then the bonding area of the 2nd substrate plate is superimposed on the zone thus coated, so as to obtain an assembly in which the free ends of the 2 substrate plates are aligned on either side of the 2 zones joined by the mastic. .
- the assembly specimen obtained is held by clips for 14 days in a room with a controlled atmosphere at 23° C. and 50% relative humidity, for crosslinking of the mastic.
- Measurement of the shear strength immediately after crosslinking For each of the substrates tested, 3 assembly specimens are prepared in accordance with point 1.1.
- the average of the shear stresses at break obtained for the 3 assembly specimens, expressed in MPa, is called "Stress at break after boiling water ⁇ 1 " and is noted in Table 2, for each of the substrates indicated.
- the variation in the breaking stress after staying in boiling water, relative to the initial breaking stress, before said stay, is calculated by the formula: ( ⁇ 1 - ⁇ 0 )/ ⁇ 0 and is indicated in % in Table 2.
- Measurement of shear strength after temperature/humidity cycle For each of the substrates tested, 3 assembly specimens are prepared in accordance with point 1.1. Said specimens are then subjected to a cycle alternating 1 hour at 80° C. and 90% relative humidity and 1 hour at ⁇ 20° C., said cycle being repeated 24 times.
- the breaking stress is then measured as indicated in point 1.2.
- the average of the breaking stresses obtained for the 3 assembly specimens, expressed in MPa, is called "Stress at break after temperature/humidity cycle ⁇ 2 " and is noted in Table 2, for each of the substrates indicated.
- the variation in the breaking stress thus measured after said cycle, relative to the initial breaking stress before said cycle, is calculated by the formula: ( ⁇ 2 - ⁇ 0 )/ ⁇ 0 and is indicated in % in the Table 2.
- For each of the substrates tested it is observed, for the mastic composition of Example 1, that the storage tests of the assemblies have the effect of increasing the shear stress at break. Such an increase is indicative of a very significant improvement in the strength of the corresponding adhesive joint. [Table 2] 2.
- Measurement of the tensile strength of a specimen made up of the cross-linked mastic 2.1. Preparation of the specimen: A standard dumbbell-shaped specimen, type 1, is used, as illustrated in international standard ISO 37. The narrow part of the dumbbell used has a length of 33 mm, a width of 6 mm and a thickness 2mm. To prepare the dumbbell, the mastic composition to be tested is applied in a Teflon mould, and the composition is left to crosslink for 14 days under standard conditions (23° C. and 50% relative humidity). 2.2. Measurement of the tensile strength immediately after crosslinking: 5 test specimens are prepared in accordance with point 2.1.
- the principle of the measurement consists of stretching a standard test piece in a tensile machine, whose mobile jaw moves at a constant speed equal to 500 mm/minute, and recording: - the elongation of the test piece (expressed in % ) during its stretching, - the tensile stress (in MPa) corresponding to an elongation of 100% of the specimen (referred to as "100% modulus"), and - the tensile stress (in MPa) at which the rupture of the specimen.
- modulus at 100% of the breaking stress is then measured as indicated in point 2.2.
- the corresponding average of the results obtained is indicated in Table 3 below under the respective headings: "Modulus at 100% after temperature/humidity cycle ⁇ 2 " and "Stress at break after temperature/humidity cycle ⁇ 2".
- the variations of these quantities, compared to the initial quantities measured immediately after crosslinking, are calculated by the formulas: ( ⁇ 2 - ⁇ 0)/ ⁇ 0 ( ⁇ 2 - ⁇ 0)/ ⁇ 0 and are indicated in % in Table 3. [Table 3]
- Example B (comparative): Example 1 is repeated with the mastic composition of Example B which is indicated in Table 1.
- the results of the shear strength and tensile strength measurements are, respectively, collated in Tables 2 and 3.
- Tables 2 and 3 With regard to the shear strength of the assemblies consisting of 2 substrates joined by the cross-linked mastic, it can be seen that, contrary to the results observed for example 1, the storage tests in boiling water and of the temperature/humidity cycle have the effect of reducing the stress at break, and this for the 3 substrates tested.
- the variations in stress at break induced by these storage tests show, compared to those of example 1, a reduction ranging: - from 11 to 18% for the boiling water storage test; and - from 36 to 76% for the temperature/humidity cycle.
- Example 1 is repeated with the mastic composition of the example C which is indicated in Table 1. The results of the shear strength and tensile strength measurements are, respectively, collated in Tables 2 and 3.
- the evolution of the mechanical properties (breaking stress and modulus at 100%) of the mastic of example C after the residence tests in boiling water and temperature/humidity cycle is generally improved compared to that observed for the mastic of example B, the mastic of example C even having an improvement in its mechanical properties after the temperature/humidity cycle, unlike the sealant of example B.
- the improvement in the mechanical properties of the sealant of example 1 according to the invention following the temperature/humidity cycle test is clearly greater than that observed for the sealant of Example C, and the alteration of these same properties after the boiling water storage test is significantly less.
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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)
- Inorganic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Sealing Material Composition (AREA)
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Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR2101825A FR3120075B1 (fr) | 2021-02-25 | 2021-02-25 | Mastic pour conditions climatiques extremes de temperature et d'humidite |
| PCT/FR2022/050341 WO2022180343A1 (fr) | 2021-02-25 | 2022-02-24 | Mastic pour conditions climatiques extremes de temperature et d'humidite |
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| Publication Number | Publication Date |
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| EP4298180A1 true EP4298180A1 (fr) | 2024-01-03 |
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| Application Number | Title | Priority Date | Filing Date |
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| EP22710694.5A Pending EP4298180A1 (fr) | 2021-02-25 | 2022-02-24 | Mastic pour conditions climatiques extremes de temperature et d'humidite |
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| Country | Link |
|---|---|
| US (1) | US20240141218A1 (fr) |
| EP (1) | EP4298180A1 (fr) |
| JP (1) | JP2024508816A (fr) |
| CN (1) | CN116917436A (fr) |
| FR (1) | FR3120075B1 (fr) |
| WO (1) | WO2022180343A1 (fr) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20180298252A1 (en) * | 2015-06-02 | 2018-10-18 | Dow Global Technologies Llc | Silyl terminated polymer adhesives |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3547848A (en) | 1967-11-03 | 1970-12-15 | Armour Ind Chem Co | Thixotropic coating compositions comprising a varnish and a di-substituted urea |
| TW593303B (en) * | 2001-09-11 | 2004-06-21 | Ciba Sc Holding Ag | Stabilization of synthetic polymers |
| WO2006049087A1 (fr) | 2004-11-01 | 2006-05-11 | Kaneka Corporation | Procédé de synthèse de polyéthers et préparations contenant lesdits polyéthers |
| FR2925517B1 (fr) | 2007-12-21 | 2010-01-08 | Bostik Sa | Adhesifs sensibles a la pression a pouvoir adhesif stable en temperature. |
| FR2954341B1 (fr) | 2009-12-21 | 2014-07-11 | Bostik Sa | Composition adhesive reticulable par chauffage |
| JP2011168772A (ja) * | 2010-01-20 | 2011-09-01 | Konishi Co Ltd | 硬化性樹脂組成物 |
| FR2969621B1 (fr) | 2010-12-22 | 2013-01-18 | Bostik Sa | Polyurethane a blocs polyether et polyester et groupe terminal alkoxysilane |
| DE102011003425B4 (de) * | 2011-02-01 | 2015-01-08 | Henkel Ag & Co. Kgaa | Verwendung einer härtbaren Zusammensetzung mit kombinierten Stabilisatoren |
| FR2981657B1 (fr) | 2011-10-21 | 2013-12-27 | Bostik Sa | Composition adhesive de polyurethanne pour la fabrication d'agglomeres |
| NL2015495B1 (en) | 2015-09-23 | 2017-04-20 | Strongbond B V | Silyl modified polymer sealant. |
| CN107674638A (zh) * | 2017-11-15 | 2018-02-09 | 四川科立鑫新材料有限公司 | 一种高强燃防火硅酮密封胶 |
| JP2021055014A (ja) * | 2019-10-01 | 2021-04-08 | 株式会社カネカ | 硬化性組成物 |
| CN112094614A (zh) * | 2020-09-24 | 2020-12-18 | 杭州之江新材料有限公司 | 一种高触变单组分改性硅烷聚合物密封胶及其制备方法 |
-
2021
- 2021-02-25 FR FR2101825A patent/FR3120075B1/fr active Active
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2022
- 2022-02-24 CN CN202280016746.4A patent/CN116917436A/zh active Pending
- 2022-02-24 WO PCT/FR2022/050341 patent/WO2022180343A1/fr not_active Ceased
- 2022-02-24 US US18/277,986 patent/US20240141218A1/en active Pending
- 2022-02-24 JP JP2023551681A patent/JP2024508816A/ja active Pending
- 2022-02-24 EP EP22710694.5A patent/EP4298180A1/fr active Pending
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20180298252A1 (en) * | 2015-06-02 | 2018-10-18 | Dow Global Technologies Llc | Silyl terminated polymer adhesives |
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| Publication number | Publication date |
|---|---|
| US20240141218A1 (en) | 2024-05-02 |
| CN116917436A (zh) | 2023-10-20 |
| FR3120075A1 (fr) | 2022-08-26 |
| WO2022180343A1 (fr) | 2022-09-01 |
| JP2024508816A (ja) | 2024-02-28 |
| FR3120075B1 (fr) | 2024-05-03 |
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