EP2396045A1 - Adhésif - Google Patents

Adhésif

Info

Publication number
EP2396045A1
EP2396045A1 EP10703013A EP10703013A EP2396045A1 EP 2396045 A1 EP2396045 A1 EP 2396045A1 EP 10703013 A EP10703013 A EP 10703013A EP 10703013 A EP10703013 A EP 10703013A EP 2396045 A1 EP2396045 A1 EP 2396045A1
Authority
EP
European Patent Office
Prior art keywords
isocyanate
tertiary amino
amino groups
terminated
structural elements
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.)
Withdrawn
Application number
EP10703013A
Other languages
German (de)
English (en)
Inventor
Christos Karafilidis
Matthias Wintermantel
Heinz-Werner Lucas
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.)
Bayer Intellectual Property GmbH
Original Assignee
Bayer MaterialScience AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Bayer MaterialScience AG filed Critical Bayer MaterialScience AG
Publication of EP2396045A1 publication Critical patent/EP2396045A1/fr
Withdrawn legal-status Critical Current

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
    • C09J175/00—Adhesives based on polyureas or polyurethanes; Adhesives based on derivatives of such polymers
    • C09J175/04—Polyurethanes
    • C09J175/08—Polyurethanes from polyethers
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
    • A61L15/00—Chemical aspects of, or use of materials for, bandages, dressings or absorbent pads
    • A61L15/16—Bandages, dressings or absorbent pads for physiological fluids such as urine or blood, e.g. sanitary towels, tampons
    • A61L15/22—Bandages, dressings or absorbent pads for physiological fluids such as urine or blood, e.g. sanitary towels, tampons containing macromolecular materials
    • A61L15/26—Macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds; Derivatives thereof
    • 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
    • C08G18/12—Prepolymer processes involving reaction of isocyanates or isothiocyanates with compounds having active hydrogen in a first reaction step using two or more compounds having active hydrogen in the first polymerisation 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
    • C08G18/28—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
    • C08G18/4804—Two or more polyethers of different physical or chemical nature
    • C08G18/482—Mixtures of polyethers containing at least one polyether containing nitrogen
    • 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
    • C08G18/4866—Polyethers having a low unsaturation value
    • 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
    • C08G18/50—Polyethers having heteroatoms other than oxygen
    • C08G18/5021—Polyethers having heteroatoms other than oxygen having nitrogen
    • 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
    • C08G18/76—Polyisocyanates or polyisothiocyanates cyclic aromatic
    • C08G18/7657—Polyisocyanates or polyisothiocyanates cyclic aromatic containing two or more aromatic rings
    • C08G18/7664—Polyisocyanates or polyisothiocyanates cyclic aromatic containing two or more aromatic rings containing alkylene polyphenyl groups
    • C08G18/7671—Polyisocyanates or polyisothiocyanates cyclic aromatic containing two or more aromatic rings containing alkylene polyphenyl groups containing only one alkylene bisphenyl group
    • 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
    • C08G2190/00—Compositions for sealing or packing joints

Definitions

  • the invention relates to the use of specific isocyanate-terminated Polyurethanpre- polymers in adhesive formulations. These adhesive formulations can be used in applications where the direct or indirect contact of the adhesive layer with sensitive substrates requires the avoidance or minimization of migrates.
  • These sensitive substrates may be, for example, the human skin or composite films.
  • the latter are used extensively for the production of packaging for all types of goods. Since monofilms, coextruded multilayer films or extrusion-laminated film composites can not cover all requirements such as transparency / opacity, printability, barrier properties, sealability and mechanical properties, composite films in which the individual layers are bonded together by adhesive make up the largest share in the market and thus have an immense commercial significance. Of particular importance is the production of food packaging from composite films. Since some layers used on the food-facing side have low barrier properties compared to the adhesive components used, the possible migration of adhesive constituents into the food must be paid particular attention. In surgery, adhesives are increasingly used for wound closure and care. It is particularly important that no harmful substances from the adhesive layer migrate into the skin or the system.
  • the laminated films must be stored after their preparation before packaging the food until the reaction has progressed so far that no migration of PAA's is more detectable or the prescribed limits are exceeded.
  • the method according to ⁇ 64 LFGB Food and Feed Code
  • a Lebimsstoffsimulanz usually 3 wt .-% - aqueous acetic acid solution
  • a Lebimsstoffsimulanz usually 3 wt .-% - aqueous acetic acid solution
  • It can be achieved levels of less than 0.2 ⁇ g PAA 's per 100ml food simulant. This corresponds to 2 ppb and at the same time the detection limit of the described method.
  • the term “free from matte” or "migratbuild Folienverbünde” is used, if this limit was exceeded.
  • EP-A 0 590 398 describes the use of low-monomer isocyanate-terminated polyurethane prepolymers obtained by removal of the monomeric polyisocyanates by distillation in solvent-free 2K adhesive formulations for the production of flexible film composites.
  • the film composites produced in this way are determined free from migrat within three days according to the method according to ⁇ 64 LFGB.
  • this procedure requires a time-consuming distillation step which increases the production costs and can not be carried out with conventional stirred kettles without plant-technical modifications.
  • the viscosity of the low-monomer isocyanate-terminated polyurethane prepolymers is higher than the conventional isocyanate-terminated polyurethane prepolymers. So have monomer-diphenylmethane diisocyanate-terminated polyurethane prepolymers having an isocyanate content of> 6 wt .-% and a viscosity of> 10,000 mPa.s at 50 0 C. This viscosity is too high for use in adhesive formulations, however, for flexible packaging.
  • DE-A 3 401 129 describes the preparation of low-monomer isocyanate-terminated polyurethane prepolymers in a two-stage process using at least two differently reactive polyisocyanates (for example tolylene diisocyanate and diphenylmethane diisocyanate).
  • polyisocyanates for example tolylene diisocyanate and diphenylmethane diisocyanate.
  • the use of a "customary accelerator" is disclosed The use of low-monomer prepolymers in adhesive formulations for bonding films is described, with the disadvantageous use and metering of two differently reactive isocyanates necessary control of the content of monomeric polyisocyanate.
  • US-A 2006/0078741 describes the use of catalysts in order to shorten the curing time of adhesive formulations for the production of film composites.
  • the shortened curing time correlates with the storage time that is necessary to obtain a migrato-free film composite.
  • a disadvantage of the use of a catalyst are its migration ability and the undesirable heavy metal content in the usually metallic catalysts.
  • adhesive formulations advantageously usable in an adhesive formulation with a polyol or a polyol blend can be used receives.
  • adhesive formulations according to the invention are prepared, for example, for the production of bundled films that are free of migratine after three days or faster according to ⁇ 64 LFGB.
  • adhesive formulations according to the invention are used as surgical adhesives for wound closure and supply or in the production of adhesive and plaster systems for wound closure and care, as are known as patches from EP-A 0 897 406, for example , or even without textile carrier directly as a wound adhesive or wound closure agent.
  • active ingredients which have a positive influence on the wound behavior can be incorporated into these adhesive preparations. These include, for example, antimicrobial agents such as antimycotics and antibacterial substances (antibiotics), corticosteroids, chitosan, dexpanthenol and chlorhexidine gluconate.
  • the present invention therefore relates to the use of isocyanate-terminated polyurethane prepolymers which contain tertiary amino groups and ethylene oxide in the polyol used to prepare the polyurethane prepolymer in adhesive formulations for the production of film composites which yield migrato-free film composites after three days at the latest Production of medical wound care systems.
  • An advantage over the prior art and the publication DE-A 102 008 009407 is that the preparation of the isocyanate-terminated prepolymers in contrast to the prior art in a 1-stage process in a conventional stirred tank, without complicated distillation, without the use of an asymmetric Isocyanates (whose availability is not always available) and without quality control of the content of monomeric polyisocyanate is possible and leads to migratelle composite films after the same or shorter time.
  • the isocyanate-terminated polyurethane prepolymers of the present invention have a lower viscosity compared with the prior art low-monomer isocyanate-terminated polyurethane prepolymers described above, and it is not necessary to add a catalyst which is usually migratable, lowers storage stability, and lowers its storage stability possibly heavy metal content in food packaging is undesirable.
  • the invention therefore preferably relates to the use of an isocyanate-terminated and tertiary amino groups and ethylene oxide-containing polyurethane prepolymers in adhesive formulations which are migratokure after three days and are particularly preferably used for the production of film composites.
  • the polyurethane prepolymer and the adhesive formulation preferably have the following characteristics:
  • the adhesive formulation preferably consists of an isocyanate-terminated polyurethane urethane prepolymer A) and a polyol or a polyol formulation B) and optionally further additives C).
  • the isocyanate-terminated polyurethane prepolymer is a reaction product of a polyisocyanate or a polyisocyanate formulation a) and at least one polyol or a polyol mixture b): a)
  • the polyisocyanate or the polyisocyanate formulation generally contains polyisocyanates having a functionality of from 2 to 3.5, preferably from 2 to 2.7, particularly preferably from 2 to 2.2 and very particularly preferably from 2 and has an NCO content of from 21 to 50% by weight, preferably from 21 to 49% by weight. %, more preferably from 29-34 wt .-% and most preferably from 33.6 wt .-%.
  • the polyol or the polyol mixture usually contains at least one polyether containing tertiary amino groups, a number average molecular weight M n of 320 to 20,000 g / mol, preferably from 330 to 4500 g / mol, particularly preferably from 340 to 4200 g / mol and very particularly preferably from 3400 to 4100 g / mol and a nominal functionality of from 2 to 4.5, preferably from 2.5 to 4.5, more preferably from 3 to 4.5 and most preferably from 4 and optionally one or more further polyethers and / or polyesters and / or polycarbonates having an average molecular weight M n of 300 to 20,000 g / mol, preferably from 430 to 17300 g / mol, particularly preferably from 590 to 8000 g / mol and completely particularly preferably from 1000 to 4000 g / mol.
  • a number average molecular weight M n of 320 to 20,000 g / mol preferably from 330
  • the polyol or the polyol mixture preferably has the following features:
  • the polyol contains structural elements of the formula -CH 2 -CH 2 -O- and for the preparation of this polyol, ethylene oxide was used exclusively or proportionally as one of the monomers used or one or more polyols of the polyol mixture contain structural elements of the formula -CH 2 -CH 2 -O- and for the preparation of these polyols ethylene oxide was used exclusively or proportionally as one of the monomers used. 2.
  • the proportion of ethylene oxide which was used in the preparation of the structural elements of the formula -CH 2 -CH 2 -O- containing polyols based on the amount of monomers used, ie the starter ausfoundd, between 10 and 100 wt .-% , preferably between 20 and 100 wt .-%, and particularly preferably between 30 and 100 wt .-%.
  • Very particular preference is given to the ethylene oxide content, based on the amount of the monomers used, ie excluding the starter, of the non-tertiary amino group-containing polyol at 40 to 100% by weight and the etbylene oxide content of the tertiary amino group-containing polyol at 0 -20% by weight.
  • This polyol or this polyol formulation a) has a hydroxyl number of 40 to 300 mg KOH / g, preferably from 80 to 270 mg KOH / g and particularly preferably from 180 to 240 mg KOH / g. b) has a nominal average functionality of 2 to 4, preferably 2 to 3.4, and more preferably from 2 to 2.9.
  • c) is a polyol, polyether polyol, polycarbonate polyol, polyetherester polyol or a polyester polyol or a mixture of two or more of said polyols.
  • d) may be proportionally prepared as one of the monomers used from ethylene oxide containing ethylene oxide, based on the amount of monomers used, i. excluding the initiator, between 10 and 100% by weight, preferably between 20 and 100% by weight, and more preferably between 30 and 100% by weight.
  • C) Optionally further additives such as fillers, catalysts or viscosity adjusting agents.
  • components A) and B) are used in a molar ratio of isocyanate groups: hydroxyl groups of 1: 1 to 1.8: 1, preferably in a molar ratio of isocyanate groups: hydroxyl groups from 1: 1 to 1.6: 1 and more preferably in a molar ratio of isocyanate groups: hydroxyl groups from 1.05: 1 to 1.5: 1 mixed.
  • the isocyanate-t ⁇ niniere polyurethane prepolymer A) is characterized in that it a) an NCO content of 5-20 wt .-%, preferably an NCO content of 9-19 wt .-%, more preferably an NCO content of 12 -18% by weight and most preferably has an NCO content of 13-17% by weight.
  • b) has a nominal average functionality of from 2 to 3, preferably from 2 to 2.7, more preferably from 2 to 2.4, and most preferably from 2 to 2.1.
  • the preparation of isocyanate-terminated and tertiary amino-containing polyurethane prepolymers A) is known in the art from polyurethane chemistry per se.
  • the reaction of components A) a) and A) b) in the preparation of the polyurethane prepolymers A) takes place, for example, in such a way that the polyols which are liquid at reaction temperatures are mixed with an excess of the polyisocyanates and the homogeneous mixture is stirred until a constant NCO value is obtained becomes.
  • the reaction temperature 4O 0 C to 18O 0 C, preferably 50 0 C to 140 0 C is selected.
  • the preparation of the polyurethane prepolymers A) can also be carried out continuously in a stirred tank cascade or suitable mixing units, such as, for example, high-speed mixers according to the rotor-stator principle.
  • polyisocyanates are suitable, for example, for the preparation of isocyanate-terminated polyurethane prepolymers A):
  • HDI 1,6-hexamethylene diisocyanate
  • IPDI isocyanatomethyl-S-isocyanato-1S-silyl trimethylcyclohexane
  • XDI xylylene diisocyanate
  • H12-MDI dicyclohexylmethane-4,4'-diisocyanate
  • TDI 2,6-toluene diisocyanate
  • MDI diphenylmethane-2,2'-diisocyanate
  • MDI diphenylmethane-2,4'-diisocyanate
  • MDI diphenylmethane-4,4'-diisocyanate
  • MDI diphenylmethane-4,4'-diisocyanate
  • diphenylmethane-2,2'-diisocyanate, diphenylmethane-2,4'-diisocyanate and diphenylmethane-4,4'-diisocyanate (MDI) and mixtures thereof to prepare component A).
  • diphenylmethane-2,2'-diisocyanate a mixture of max. 1% by weight of diphenylmethane-2,2'-diisocyanate, 40 to 70% by weight of diphenylmethane-2,4'-diisocyanate and 28 to 60% by weight of diphenylmethane-4,4'-diisocyanate ( MDI) for the preparation of component A).
  • MDI diphenylmethane-4,4'-diisocyanate
  • Polyether polyols suitable for preparing the isocyanate-terminated polyurethane prepolymer A) and the polyol formulation B) are known per se to the person skilled in the art from polyurethane chemistry. These are typically obtained starting from low molecular weight polyfunctional OH or NH-functional compounds as starters by reaction with cyclic ethers or mixtures of various cyclic ethers.
  • the catalysts used are bases such as KOH or double metal cyanide-based systems. Suitable manufacturing processes for this purpose are known per se to the person skilled in the art, for example, from US Pat. No. 6,486,361 or L.E.St. Pierre, Polyethers Part I, Polyalkylene Oxide and other Polyethers, Editor: Norman G. Gaylord; High Polymers Vol. XHl; Inter- science Publishers; Newark 1963; P. 130 ff.
  • Polyether polyols containing tertiary amino groups and suitable for use as polyol component ii) for preparing the isocyanate-terminated polyurethane prepolymer A) can be prepared from a variety of aliphatic and aromatic amines containing one or more primary or secondary amino groups.
  • Suitable initiators for the preparation of the polyethers containing tertiary amino groups are the following amino compounds or mixtures of these amino compounds: ammonia, methylamine, triethanolamine, N-methyldiethanolamine, N, N, -dimethylethanolamine, ethylenediamine, N, N-dimethylethylenediamine, N, N'-dimethylethylenediamine, tetramethylenediamine, hexamethylenediamine, 2,4-toluenediamine, 2,6-tolylenediamine, aniline, diphenylmethane-2,2'-diamine, diphenylmethane-2, 4'-diamine, diphenylmethane-4,4'-diamine, 1-aminomethyl-3-amino-1, 5,5-trimethylcyclohexane (isophoronediamine), dicyclohexylmethane-4,4'-diamine and xylylene diamine.
  • the amines ethylenediamine, N, N-dimethylethylenediamine, N, N'-dimethylethylenediamine, triethanolamine and N-methyldiethanolamine are particularly preferably used.
  • polyether polyols which do not contain tertiary amino groups and are suitable for use as polyol component ii) to prepare the isocyanate-terminated polyurethane prepolymer A) or for use in the polyol formulation B) can be prepared from a variety of alcohols having one or more primary or secondary Contain alcohol groups.
  • the following compounds or mixtures of these compounds can be used as starters for the preparation of polyethers containing no tertiary amino groups: water, ethylene glycol, Propylene glycol, glycerol, butanediol, butanetriol, trimethylolethane, pentaerythritol, hexanediol, 3-hydroxyphenol, hexanetriol, trimethylolpropane, octanediol, neopentyl glycol, 1,4-hydroxymethylcyclohexane, bis (4-hydroxyphenyl) dimethylmethane and sorbitol.
  • Preference is given to using ethylene glycol, propylene glycol, glycerol and trimethylolpropane, more preferably ethylene glycol and propylene glycol, and in a particularly preferred embodiment, propylene glycol is used.
  • Suitable cyclic ethers for the preparation of polyethers described above are alkylene oxides such as ethylene oxide, propylene oxide, butylene oxide, epichlorohydrin, styrene oxide or tetrahydrofuran or mixtures of these alkylene oxides into consideration. Preference is given to using propylene oxide, ethylene oxide or tetrahydrofuran or mixtures of these. Particular preference is given to using propylene oxide or ethylene oxide or mixtures of these. Most preferably, propylene oxide is used.
  • polyester polyols suitable for the preparation of the isocyanate-terminated polyurethane prepolymer A) and the polyol formulation B) are known per se to the person skilled in the art from polyurethane chemistry.
  • polyester polyols can be prepared which are formed by reacting low molecular weight alcohols, in particular ethylene glycol, diethylene glycol, neopentyl glycol, hexanediol, butanediol, propylene glycol, glycerol or trimethylolpropane with caprolactone.
  • low molecular weight alcohols in particular ethylene glycol, diethylene glycol, neopentyl glycol, hexanediol, butanediol, propylene glycol, glycerol or trimethylolpropane with caprolactone.
  • polyfunctional alcohols for the preparation of polyester polyols are 1,4-hydroxymethylcyclohexane, 2-methyl-l, 3-propanediol, 1,2-butanetriol, triethylene glycol, tetraethylene glycol, polyethylene glycol, dipropylene glycol, polypropylene glycol, dibutylene glycol and polybutylene.
  • polyester polyols can be prepared by polycondensation.
  • difunctional and / or trifunctional alcohols with a deficit of dicarboxylic acids or tricarboxylic acids or mixtures of dicarboxylic acids or tricarboxylic acids, or their reactive derivatives, can be condensed to polyester polyols.
  • Suitable dicarboxylic acids are, for example, adipic acid or succinic acid and their higher homologues having up to 16 carbon atoms, furthermore unsaturated dicarboxylic acids such as maleic acid or fumaric acid and aromatic dicarboxylic acids, in particular the isomeric phthalic acids such as phthalic acid, isophthalic acid or terephthalic acid.
  • tricarboxylic acids for example, citric acid or trimellitic acid are suitable.
  • the acids mentioned can be used individually or as mixtures of two or more thereof.
  • Particularly suitable alcohols are hexanediol, butanediol, ethylene glycol, diethylene glycol, neopentyl glycol, 3-hydroxy-2,2-dimethylpropyl-3-hydroxy-2,2-dimethylpropanoate or trimethylolpropane or mixtures of two or more thereof.
  • Particularly suitable acids are phthalic acid, isophthalic acid, terephthalic acid, adipic acid or dodecanedioic acid or mixtures thereof.
  • High molecular weight polyester polyols include, for example, the reaction products of polyfunctional, preferably difunctional, alcohols (optionally together with minor amounts of trifunctional alcohols) and polyfunctional, preferably difunctional, carboxylic acids.
  • polyfunctional, preferably difunctional, alcohols instead of free polycarboxylic acids (if possible), the corresponding polycarboxylic anhydrides or corresponding polycarboxylic acid esters can be used with alcohols having preferably 1 to 3 carbon atoms.
  • the polycarboxylic acids may be aliphatic, cycloaliphatic, aromatic or heterocyclic or both. They may optionally be substituted, for example by alkyl groups, alkenyl groups, ether groups or halogens.
  • polycarboxylic acids examples include succinic acid, adipic acid, suberic acid, sebacic acid, dodecanedioic acid, phthalic acid, isophthalic acid, terephthalic acid, trimellitic acid, phthalic anhydride, tetrahydrophthalic anhydride, hexahydrophthalic anhydride, tetrachlorophthalic anhydride, endomethylenetetrahydrophthalic anhydride, glutaric anhydride, maleic acid, maleic anhydride, fumaric acid, dimer fatty acid or Trimer fatty acid or mixtures of two or more thereof.
  • Lactones for example based on ⁇ -caprolactone, also called “polycaprolactones", or hydroxycarboxylic acids, for example ⁇ -hydroxycaproic acid, available polyesters, can also be used.
  • polyester polyols of oleochemical origin can be prepared, for example, by complete ring opening of epoxidized triglycerides of an at least partially olefinically unsaturated fatty acid-containing fatty mixture with one or more alcohols having 1 to 12 carbon atoms and subsequent partial transesterification of the triglyceride derivatives to alkyl ester polyols having 1 to 12 carbon atoms be prepared in the alkyl radical.
  • the polycarbonate polyols suitable for preparing the isocyanate-terminated polyurethane prepolymer A) and the polyol formulation B) are known per se to those skilled in polyurethane chemistry.
  • polycarbonate polyols can be prepared by the reaction of diols, such as propylene glycol, 1,4-butanediol or 1,6-hexanediol, diethylene glycol, triethylene glycol or tetraethylene glycol or mixtures of these diols with diaryl carbonates, for example diphenyl carbonates, or phosgene ,
  • the adhesive formulation may additionally contain additives C) known from adhesive technology as formulation auxiliaries.
  • additives C are, for example, the customary plasticizers, fillers, Pigments, drying agents, light stabilizers, antioxidants, thixotropic agents, adhesion promoters and optionally other auxiliaries and additives.
  • Suitable fillers are carbon black, precipitated silicas, pyrogenic silicic acids, mineral chalks and precipitation precipitates.
  • Suitable plasticizers are, for example, phthalic acid esters, adipic acid esters, alkylsulfonic acid esters of phenol or phosphoric acid esters.
  • thixotropic agents examples include pyrogenic silicic acids, polyamides, hydrogenated castor oil derived products or else polyvinyl chloride.
  • Suitable drying agents are, in particular, alkoxysilyl compounds, e.g. Vinyltrimethoxysilane, methyltrimethoxysilane, methyltriethoxysilane, i-butyltrimethoxysilane, i-butyltriethoxysilane, octyltriethoxysilane, octyltrimethoxysilane, propyltriethoxysilane, propyltrimethoxysilane, hexadecyltrimethoxysilane, and also inorganic substances such as e.g. Calcium oxide (CaO) and isocyanate group bearing compounds such as e.g. Tosylisocyanate.
  • alkoxysilyl compounds e.g. Vinyltrimethoxysilane, methyltrimethoxysilane, methyltriethoxysilane, i-butyltrimethoxysilane, i-butyltrie
  • Adhesion promoters used are the known functional silanes, for example aminosilanes of the abovementioned type, but also N-aminoethyl-3-aminopropyltrimethoxysilane, N-aminoethyl-3-aminopropylmethyldimethoxysilane, N-aminoethyl 3-aminopropyltrimethoxy, 3-glycidoxypropyltrimethoxysilane, 3-glycidoxypropyltriethoxysilane, mercaptosilanes, bis (3-triethoxysilylpropyl) amine, bis (3-trimethoxysilylpropyl) amine, oligoaminosilanes, 3-aminopropylmethyldiethoxysilane, 3-aminopropyltriethoxysilane , 3-aminopropyltriethoxysilane, triaminofunctional propyltrimethoxysilane, N- (
  • the additives C) can be added to the polyol or the polyol formulation B) or to the isocyanate-terminated and tertiary amino-containing polyurethane prepolymer A) or both.
  • the additives C) are preferably added to the polyol or the polyol formulation B).
  • the two components A) and B) of the adhesive formulation, to which the additives C) have already been added are mixed together immediately prior to the production of the film composite and introduced into the laminating machine or the commissioned work.
  • the mixing of the components A) and B), where appropriate the additives C) have already been added in the laminating machine itself directly before or in the commissioned work.
  • the adhesive formulation can be used as a 100% system, ie solvent-free, or in a suitable solvent or a suitable Amsterdamsmitteünischung for the production of the film composite.
  • the so-called carrier film is coated with the adhesive formulation with an average dry coating weight of 1 to 9 g / m 2 and laminated by bringing into contact with a second film to form the resulting film composite.
  • suitable solvents or solvent mixtures are used, prior to contacting the carrier sheet with the second sheet, remove the solvents completely in a drying channel or other suitable apparatus.
  • the adhesive formulation is preferably used for bonding plastic films, aluminum foils, other metal foils, metal-coated plastic foils and metal oxide-vapor-deposited plastic foils.
  • the viscosities were determined at a measuring temperature of 25 ° C. using the Viskotester VT 550 rotational viscometer from Thermo Haake, Düsseldorf, DE with the measuring cup SV and the measuring device SV DIN.
  • the NCO content of the prepolymers or reaction mixtures was determined in accordance with DIN EN 1242.
  • the determination of the monomer migration of aromatic polyisocyanates is based on the method according to ⁇ 64 LFGB (method: BVL L 00.00-6 "Examination of foodstuffs - Determination of primary aromatic amines in aqueous test foods, from the method collection of the Federal Office for Consumer Protection and Food Safety) ,
  • the film composite to be examined (polyethylene terephthalate / aluminum foil / polyethylene film) is used as a roll pattern in a climate chamber at 23 ° C and 50% rel. Moisture stored. After 1, 3 and 7 days, 5 layers of film web are unwound and two samples each of approximately 120 mm ⁇ 220 mm are removed for the production of the test bags.
  • the testing bag (100 mm x 200 mm in inside dimensions) with the polyvinyl lyethylenfolien interior of the pouch with 200 ml of 3% aqueous acetic acid solution are filled as a food simulant, sealed and stored at 70 0 C for two hours. Immediately after storage, the bags are emptied and the food simulant solution cooled to room temperature.
  • the migrated polyisocyanates are detected by diazotization of the primary aromatic amines formed in the aqueous food simulant from the aromatic polyisocyanates and subsequent coupling with N- (1-naphthyl) ethylenediamine.
  • the extinction values of the coupling component are measured against the respective zero sample, and the values are converted to a calibration curve in ⁇ g anilinium hydrochloride / 100 ml test food.
  • NCO NCO content in% by weight of NCO groups
  • VH bond strength [N / 1 5 mm] between the aluminum and the polyethylene layer in the following composite 12 ⁇ m polyethylene terephthalate / 9 ⁇ m aluminum foil / 60 ⁇ m polyethylene film
  • MIG migrated polyisocyanates converted into ⁇ g anilinium hydrochloride / 100 ml test food [ ⁇ g anilinium hydrochloride / 100 ml test food]
  • P3 polyester polyol as reaction product of adipic acid and diethylene glycol, OHZ 112, SZ ⁇ 1.3
  • P4 polyesterpolyol as the reaction product of adipic acid and diethylene glycol, OHZ 43, SZ ⁇ 1.5
  • polyester polyol as the reaction product of adipic acid as the acid component and from a mixture of 1 part by weight of trimethylolpropane and 12.8 parts by weight of diethylene glycol as the alcohol component, OHZ 60, SZ ⁇ 2
  • PlO Polyethylene ether glycol prepared by KOH catalysis, OHZ 56 polyisocyanates:
  • NCOl A mixture of 0.1% diphenylmethane-2,2'-diisocyanate, 50.8% diphenylmethane-2,4'-diisocyanate, 49.1% diphenylrethane-4,4'-diisocyanate
  • Non-inventive prepolymer containing tertiary amino groups
  • a polyol mixture of 1102 g Pl and 1102 g P2 is stirred for dehydration for 1 hour at 120 0 C under a vacuum of 20 mbar. It is then cooled to 70 0 C. The resulting polyol mixture is added within about 30 minutes to 2797 g of NCOl. Then, taking advantage of a possibly occurring exothermic reaction is heated to 80 0 C and stirred for 2h. It is stirred at 80 0 C until the isocyanate content is constant. The result is an isocyanate-terminated polyurethane prepolymer with a content of 15.2% NCO and a viscosity of 1630 mPas (25 0 C).
  • tertiary amino groups and ethylene oxide-containing prepolymer 1 are tertiary amino groups and ethylene oxide-containing prepolymer 1:
  • a polyol mixture of 2550 g P2 and 2550 g P9 is stirred for 1 hour at 120 0 C under a vacuum of 20 mbar for dehydration. It is then cooled to 50 0 C. 5900 g of NCOl are added to the polyol mixture obtained within about 30 minutes. Then, taking advantage of a possibly occurring exothermic reaction is heated to 80 0 C and stirred for 2h. It is stirred at 80 0 C until the isocyanate content is constant. The result is an isocyanate-terminated polyurethane prepolymer with a content of 15.8% NCO and a viscosity of 1160 mPas (25 ° C).
  • tertiary amino groups and ethylene oxide-containing prepolymer 2 are tertiary amino groups and ethylene oxide-containing prepolymer 2:
  • a polyol mixture of 346 g P2 and 346 g PlO is stirred for 1 hour at 120 0 C under a vacuum of 20 mbar. It is then cooled to 50 0 C. The Polyohnischung obtained is added within about 30 minutes to 807 g of NCOl. Then, taking advantage of a possibly occurring exothermic reaction is heated to 80 0 C and stirred for 2h. The mixture is stirred at 80 ° C. until the isocyanate content is constant. The result is an isocyanate-terminated polyurethane prepolymer with a content of 16.2% NCO and a viscosity of 1150 mPas (23 0 C).
  • Inventive, tertiary Aminogr ⁇ ppen and ethylene oxide-containing prepolymer 3 is Inventive, tertiary Aminogr ⁇ ppen and ethylene oxide-containing prepolymer 3:
  • a polyol mixture of 426 g P2 and 426 g PlO is stirred for 1 hour at 120 0 C under a vacuum of 20 mbar. It is then cooled to 50 0 C. The resulting polyol mixture is metered in within about 30 minutes to 649 g NCO 1. Then, taking advantage of a possibly occurring exothermic reaction is heated to 80 0 C and stirred for 2h. The mixture is stirred at 80 ° C. until the isocyanate content is constant. The result is an isocyanate-terminated polyurethane prepolymer with a content of 11.7% NCO and a viscosity of 3500 mPas (23 0 C).
  • the mixture of the polyol component and the polyisocyanate component is naturally not storable, it is prepared immediately before the production of the film composite by intimately mixing the polyol component and the polyisocyanate component and processed immediately.
  • the film composites are produced by a "Polytest 440" solvent-free laminating system from Polytype in Freiburg, Switzerland.
  • the film composites are made of a polyethylene terephthalate / aluminum precompound and a polyethylene film.
  • the aluminum side of the pre-bond is coated with the adhesive film, glued to the polyethylene film and then wound up on a roll core.
  • the length of the film composite produced with the adhesive formulation is at least 20 m.
  • the dry application rate of the adhesive formulation is between 1.9 g and 3.3 g and the roller temperature of the commissioned work at 30-50 0 C.
  • the values given are in each case average values from two independent preparations of the film composites.

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  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Organic Chemistry (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Materials Engineering (AREA)
  • Engineering & Computer Science (AREA)
  • Hematology (AREA)
  • Epidemiology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Polyurethanes Or Polyureas (AREA)
  • Adhesives Or Adhesive Processes (AREA)

Abstract

L'invention concerne l'utilisation de prépolymères de polyuréthane spéciaux à terminaison isocyanate dans des formulations d'adhésif. Ces formulations d'adhésif peuvent être utilisées dans des applications dans lesquelles un contact direct ou indirect de la couche d'adhésif a lieu avec des substrats réagissant avec celui-ci.
EP10703013A 2009-02-13 2010-02-02 Adhésif Withdrawn EP2396045A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102009008867A DE102009008867A1 (de) 2009-02-13 2009-02-13 Klebstoff
PCT/EP2010/000617 WO2010091806A1 (fr) 2009-02-13 2010-02-02 Adhésif

Publications (1)

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EP2396045A1 true EP2396045A1 (fr) 2011-12-21

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EP10703013A Withdrawn EP2396045A1 (fr) 2009-02-13 2010-02-02 Adhésif

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US (1) US20120000603A1 (fr)
EP (1) EP2396045A1 (fr)
CN (1) CN102316910A (fr)
DE (1) DE102009008867A1 (fr)
WO (1) WO2010091806A1 (fr)

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DE102014209019A1 (de) 2014-05-13 2015-11-19 Henkel Ag & Co. Kgaa Bindemittel-System mit schnellerer Aushärtung
DE102015207792A1 (de) 2015-04-28 2016-11-03 Henkel Ag & Co. Kgaa Polyurethan-basiertes Bindemittel-System
EP3296373B1 (fr) * 2015-05-08 2021-07-28 Bando Chemical Industries, Ltd. Feuille adhésive optiquement transparente, son procédé de production, stratifié et dispositif d'affichage a écran tactile
CN108137999B (zh) * 2015-09-29 2021-02-02 阪东化学株式会社 光学透明粘着片、层叠体及其制法、带触摸屏的显示装置
KR102062225B1 (ko) 2015-11-26 2020-01-03 반도 카가쿠 가부시키가이샤 광학투명점착시트, 광학투명점착시트의 제조방법, 적층체, 및 터치패널을 갖는 표시장치
EP3327056B1 (fr) * 2016-11-25 2022-04-27 Henkel AG & Co. KGaA Composition de colle de contrecollage peu visqueuse, durcissant rapidement
KR102448664B1 (ko) * 2016-11-25 2022-09-28 헨켈 아게 운트 코. 카게아아 저 점도, 신속 경화 라미네이팅 접착제 조성물
JP6451021B2 (ja) * 2016-12-02 2019-01-16 Dic株式会社 反応型接着剤、積層フィルム及び包装体
RU2663779C1 (ru) * 2017-11-29 2018-08-09 Федеральное государственное бюджетное образовательное учреждение высшего образования "Российский экономический университет имени Г.В. Плеханова" (ФГБОУ ВО "РЭУ им. Г.В. Плеханова") Полиуретановая клеевая композиция
EP4259685A1 (fr) 2020-12-10 2023-10-18 Covestro Deutschland AG Procédé de préparation d`un polyisocyanate, polyisocyanate, son utilisation et produits de polyaddition préparés à partir de ce dernier

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DE4136490C2 (de) 1991-11-06 2003-04-30 Bayer Ag Lösungsmittelfreie Beschichtungssysteme
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DE102009008867A1 (de) 2010-08-19
US20120000603A1 (en) 2012-01-05
WO2010091806A1 (fr) 2010-08-19
CN102316910A (zh) 2012-01-11

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