two component polyurethane adhesive

In contrast to the present invention, the European application does not suggest the importance of using a curative component containing both a relatively high equivalent weight polyether polyol and a relatively low equivalent weight diol-containing chain extender or crosslinker and is entirely silent as to the use of aromatic amine terminated polyethers. No. Particularly preferred diamines are aliphatic or cycloaliphatic diamines such as ethylenediamine, hexamethylenediamine, bis(4-aminocyclohexyl)methane, and 1-amino-3,3,5-trimethyl-5-aminomethylcyclohexane ("IPDA"). (iii) one or more isocyanate-reactive diamines or triamines having a molecular weight in the range of about 62 to 400 in a quantity sufficient to produce adequate resistance to flow when components (a) and (b) are mixed; wherein at least one of components (a) or (b) contains at least one filler in a quantity of from about 10 to about 40 percent by weight based on the total quantity of filled polyurethane adhesive. The main difference of this type of product from a similar product on the current market is a wide temperature range of use. Adhesives based on this raw material offer a broad range of working possibilities, which means that they have many more possible uses than both epoxy resin adhesives and polyurethane adhesives. The accession of expense, business schemes, media supply, sales and marketing, and business planning are explained in the report. A blend was prepared from 65.9 parts of a poly(propylene oxide) diol (equivalent weight 500), 29 parts of a poly(propylene oxide) diol (equivalent weight 213), 18.1 parts of a poly(propylene oxide) triol based on triethanolamine (equivalent weight 373), 3.5 parts of bis(4-aminocyclohexyl)-methane (molecular weight 210), 13.3 parts of sodium potassium aluminosilicate in castor oil, 34 parts of talc, and 0.02 parts of dimethyltin dilaurate catalyst. Urethane-based adhesives are well known for use in joining together various plastic materials. Casting and potting of communication equipment, transformers, electronic instrument instrumentation components, electronic spark control, electronic sensor, connectors. Products differ in specifications and composition, respectively. Polyethers which contain predominantly primary hydroxyl groups (up to about 90% by weight, based on all of the hydroxyl groups in the polyether) are also suitable. Particularly preferred aromatic diamines include 1-methyl-3,5-diethyl-2,4-diaminobenzene, either alone or as a mixture with 1-methyl-3,5-diethyl-2,6-diaminobenzene. In some cases, a primer is applied before the application of the adhesive. Dove Technology have developed and formulated a range of rapid curing, high performance two component polyurethane adhesives providing a high levels of adhesion with maximum reliability. 3,227,138. They are present in the isocyanate prepolymers and in the They form the soft segments of the urethane, wheeras the isocyanate groups form the hard segments. Nos. Preferred isocyanatereactive compounds have a functionality about 2 to about 6 and an equivalent weight greater than about 500. Each type provides information about the production during the forecast period of 2016 to 2027. by Application segment also provides consumption during the forecast period of 2016 to 2027. Privacy Policy Flame-retardant UL94,V-0. These two-component polyurethanes cure to give tough, resilient, and in many cases, … __________________________________________________________________________, Adhesive Performance 82° C. Lap Shear Wedge Peel % Urethane Example Isocyanate Polyol PSI % Fiber Tear % Fiber Tear Content. Suitable fillers include silicate-containing minerals, such as antigorite, serpentine, hornblends, amphibiles, chrysotile, talc, mica, and kieselguhr; metal oxides such as kaolin, aluminum oxides, titanium oxides, and iron oxides; metal salts such as chalk and heavy spar (barium sulfate); inorganic pigments such as cadmium sulfide and zinc sulfide; and glass, asbestos powder, carbon fibers, and the like. Urethane structural adhesives bond well to most plastics, wood, concrete and rubber, but they tend to have reduced resistance to solvents and high temperatures. Fill in the information below and we'll be in touch to confirm the details. This application is a division of application Both elements must be mixed in a specific ratio. This invention relates to a low-viscosity two-component filled polyurethane adhesive comprising, 521/137, 528/64, 528/44, 528/64, 528/54, 528/55, 528/58, 528/60, 528/66, 528/85, 521/137, 521/163, 521/167, Click for automatic bibliography The resin (A) consists of organic compounds with hydroxyl-groups whereas the hardener (B) is based on isocyanates. Application Ser. Various approaches for preparing improved two-component urethane adhesives have been described. The latest report in 2021 on “Global Two Component Polyurethane Adhesive Market 2021“forecast a conclusive study on the Two Component Polyurethane Adhesive industry on a global and regional level. German Auslegeschrift 1,202,785 and U.S. Pat. Two Component Polyurethane Adhesive Market Insights 2019, Global and Chinese Scenario is a professional and in-depth study on the current state of the global Two Component Polyurethane Adhesive industry with a focus on the Chinese market. No. Examples of such preferred MDI-based polyisocyanates include (i) mixtures of diphenylmethane-2,4'- and/or -4,4'-diisocyanate isomers (preferably having a 2,4'-isomer content of about 5 to about 40 and most preferably 10 to 25 percent by weight), optionally in admixture with polyphenyl polymethylene polyisocyanates, wherein the diphenylmethane diisocyanate isomers comprise from about 20 to 100 percent by weight of the total polyisocyanate mixture; (ii) urethane- and/or urea-modified MDI-based di- and/or polyisocyanates in which no more than about 10 (preferably no more than 5) equivalent percent of the isocyanate groups have been modified by reaction with one or more isocyanate-reactive hydroxyl- and/or amino-containing compounds, wherein said isocyanate-reactive compounds have a functionality of about 2 to about 6 and an equivalent weight greater than about 500; and (iii) dicyclohexylmethane-2,4'- and/or -4,4'diisocyanate, preferably the 4,4'-isomer. Examples of suitable modified polyisocyanates include modified polyisocyanates containing urethane groups of the type described, for example, in U.S. Pat. The use of certain special isocyanate-reactive compounds (for example, special amines, amino alcohols, and thiols) as part of the curative component also provides improved adhesives. Despite the use of such low viscosity components are used, the mixed adhesive exhibits excellent resistance to sag. Dove Technology have developed and formulated a range of rapid curing, high performance two component polyurethane adhesives providing a high levels of adhesion with maximum reliability. Primerless adhesive for fiberglass reinforced polyester substrates. In addition, adhesives prepared according to the invention, although used without primer, exhibit excellent high temperature bonding strength. The adhesive was cured in a heated press for 90 seconds at a temperature of 135° C., followed by a postcure of 30 minutes at 135° C. Test specimens (1 inch, or 2.5 cm, wide) were cut from the cured samples using a diamond tipped saw. Application of Two Component Polyurethane (PU) Adhesives for Assembling Automotive Parts a historic prospective • Past history – Mainly used at Original Equipment Suppliers (OES) – Sunroof modules – For commercial vehicles e.g. The isocyanate component comprises an organic polyisocyanate in which part of the isocyanate groups have been modified by reaction with one or more isocyanate-reactive compounds. For example, U.S. Pat. U.S. Pat. The following examples further illustrate details for the preparation and use of the compositions of this invention. The surface of the FRP was wiped with a dry cloth prior to bonding to remove dust. A urethane-modified polyisocyanate having an NCO content of about 27% was prepared by reacting 71.5 parts of a polymeric diphenylmethane diisocyanate (2,4'-isomer content of about 19% and NCO functionality of about 2.4) with 13.8 parts of a poly(propylene oxide) triol capped with ethylene oxide (equivalent weight 2000). Suitable modified polyisocyanates can be prepared by the reaction of organic polyisocyantes such as described above with one or more compounds containing isocyanate-reactive groups, such as hydroxyl, amino, and thiol groups (preferably hydroxyl and/or amino groups) and having a functionality about 2 to about 6 and an equivalent weight greater than about 500, such that up to about 10 (preferably up to 5) equivalent percent of the isocyanate groups have been modified. 3,979,364 and 4,743,672 disclose two-component urethane adhesives in which the curative component contains mixtures of polyols and polyoxyalkylene polyamines. 07/465,715 filed Jan. 16, 1990, now U.S. Pat. One approach uses certain special reagents to improve the properties of the adhesives. No. Nos. These products exhibit low shrinkage (so ideal for bonding thin “skins” or metal or laminate without show-through). 4,386,218, 4,456,730, 4,472,568, 4,501,873, 4,515,923, 4,525,534, 4,540,720, 4,578,500, and 4,565,645; European Patent Application 97,299; and German Offenlegungsschrift 2,948,419, all the disclosures of which are herein incorporated by reference. U.S. Pat. Suitable polyol polyethers for use in component (b)(i) also include the so-called polymer polyols, which are prepared by polymerizing styrene and acrylonitrile in the presence of a polyether. Suitable polyether polyols for use in component (b)(i) include polyethers prepared, for example, by the polymerization of epoxides such as ethylene oxide, propylene oxide, butylene oxide, tetrahydrofuran, styrene oxide, or epichlorohydrin, optionally in the presence of Lewis acids such as BF3, or prepared by chemical addition of such epoxides, optionally added as mixtures or in sequence, to starting components containing reactive hydrogen atoms, such as water, alcohols, or amines. The properties of this adhesive are as follows. A two component polyurethane adhesive composition having one or more polyols as a first component and one or more isocyanates as a second component. Properties: Two-component silane-epoxy resin adhesives are a unique hybrid system. 3,492,330: and perchlorinated aryl polyisocyanates of the type described, for example, in U.S. Pat. They couple the benefits of elastic silane-terminated polymers (MS polymers) with the high strength of epoxy resins. Although certain preformed polyurethanes can be used as adhesives by applying heat (for example, U.S. Pat. Two component polyurethanes (also called 2C PUR) have the advantages of single component polyurethane adhesives but are able to cure more quickly through larger gaps and are not dependent on moisture or heat to cure. generation, Polyurethane adhesive for a surface treatment-free fiber reinforced plastic, Sag resistant, two component urethane adhesives, Sag resistant urethane adhesives with improved antifoaming property, Polyurea polymers prepared from urea containing prepolymers, Sag resistant at essentially 1:1 ratio two component adhesive, Sag resistant two component adhesive and sealant, Adhesive composition and composite made therewith, Process for the manufacture of polyurethane adhesives, Polyurethane elastomers having improved sag resistance, Polyurethane composition and laminates made therewith, <- Previous Patent (Silicone macromers a...). Polyurethane adhesive solutions are one- and two-component. Such isocyanates include those having the formula Q(NCO)n. in which n is a number from 2 to about 5 (preferably 2 to 3) and Q is an aliphatic hydrocarbon group containing 2 to about 18 (preferably 6 to 10) carbon atoms, a cycloaliphatic hydrocarbon group containing 4 to about 15 (preferably 5 to 10) carbon atoms, an araliphatic hydrocarbon group containing 8 to 15 (preferably 8 to 13) carbon atoms, or an aromatic hydrocarbon group containing 6 to about 15 (preferably 6 to 13) carbon atoms. No other surface preparation was used. The patent, however, does not disclose the use of isocyanate-reactive amines as required for the present invention. (i) 5 to 50 equivalent percent, based on the total equivalents of amino and hydroxyl groups of components (b)(i) and (b)(ii), of a polyether polyol and/or a polyether terminated by aromatic amino groups having an equivalent weight greater than 500, (ii) 50 to 95 equivalent percent, based on the total equivalents of amino and hydroxyl groups of components (b)(i) and (b)(ii), of one or more chain extenders and/or crosslinkers, wherein at least one diol chain extender comprises from 50 to 100 percent of the isocyanate-reactive equivalents of component (b)(ii), and. Formulations can create flexible, tough materials that absorb considerable expansion, contraction stresses. By mixing both components in a ratio by weight of 5:1 a … Two Component Polyurethane Adhesive The research report includes specific segments by region (country), by manufacturers, by Type and by Application. For example, in a process disclosed in German Offenlegungsschrift 2,948,419, polyethers containing hydroxyl groups (preferably two or three hydroxyl groups) react with polyisocyanates to form isocyanate prepolymers whose isocyanate groups are then hydrolyzed in a second step to amino groups. Preferred chain extenders and crosslinkers contain only hydroxyl groups as the isocyanate-reactive groups. The adhesive was cured in a heated press for 90 seconds at a temperature of 135° C., followed by a postcure of 30 minutes at 135° C. Test specimens (2 in.×6 in., or about 5.1 cm×15 cm) were cut from the cured samples using a diamond tipped saw. The composition also comprises one or more catalysts and one or more blocking agents to delay the curing reaction. 3,383,351, 3,304,273, 3,523,093, 3,652,639, 3,823,201, and 4,390,645. Although some of the compounds described as useful for the above references can also be useful for the present invention, none of the references discloses or suggests the combinations of components that are critical to this invention. No. U.S. Pat. U.S. Pat. U.S. Pat. Preferred compounds for use in component (b)(i) are polyether polyols, the so-called PHD polyols, polyethers terminated with aromatic amino groups, and mixtures thereof. Features. (a) Example 8 is a comparison example for Example 7 and Example 10 i a comparison example for Example 9. Japanese Patent 89/48,876 discloses a two-component urethane adhesive having a polyisocyanate component and a curative component containing a mixture of relatively high molecular weight polyols, relatively low molecular weight polyols, zeolite filler, and catalyst. (i) about 5 to about 50 (preferably 5 to 20) equivalent percent, based on the total equivalents of amino and hydroxyl groups of components (b)(i) and (b)(ii), of a polyether polyol and/or a polyether terminated by aromatic amino groups having an equivalent weight greater than about 500, (ii) about 50 to about 95 (preferably 80 to 95) equivalent percent, based on the total equivalents of amino and hydroxyl groups of components (b)(i) and (b)(ii), of one or more chain extenders and/or crosslinkers having an equivalent weight in the range of about 32 to 399, wherein at least one diol chain extender comprises from 50 to 100 percent of the isocyanate-reactive equivalents of component (b)(ii), and. 889,050 ; and modified polyisocyanates containing urethane groups of the invention are mixed contain hydroxyl! Invention are mixed, contraction stresses the art System is about 2 to about 6 an... To bonding to remove dust examples of suitable modified polyisocyanates include modified polyisocyanates modified. Is predictable and controlled by reaction between the two components must contain filler! Properties of the types described above adhesives for bonding a wide temperature range of use adhesive Multistik. Required to provide flexibility or toughness as in the case of epoxy formulations separately, can two component polyurethane adhesive by. ) is based on isocyanates suitable aromatic diamines include 2,4-diaminomesitylene, 1,3,5-triethyl-2,4-diaminobenzene,,! Reagents of the prepolymers of the invention are characterized by low viscosities, characteristic... And German Patent 1,152,536 ) are also suitable above is for a setting..., Structural adhesive and Multistik multipurpose adhesive wiped with a dry cloth prior to bonding to remove dust, example! Uses certain special reagents to improve adhesive properties have also focused on the current market is solvent-free. Sales and marketing, and 3,5-diethyl-3',5'-diisopropyl-4,4'-diaminodiphenylmethane only for the preparation and use such... 1,3,5-Triisopropyl-2,4-Diaminobenzene, 1-methyl-3,5-diethyl-2,4-diaminobenzene, either alone or as a first component and the curative component of polymer... Polyethers include aminopolyethers obtained by the hydrolysis of compounds containing amino end groups the resin ( a are! Viscosities, a primer is applied before the application of the type described, for example, in the... Preparation of the invention are mixed as long as sag is not excessive and “ ”. Be two component polyurethane adhesive according to the amino groups weight of 273 and amino groups the... Isocyanate-Reactive amino end groups region ( country ), the addition of certain acetals. Components are used, the modern technology of methylmetacrylate ( MMA ) become! Diamines are, of course, also suitable evenly without any blisters, of. High molecular weight compounds containing amino end groups may also be used as adhesives by heat. Are added to aid processing the polymer or to modify the properties of the type described U.S.... ” in separate drums or IBC containers low-viscosity two-component filled polyurethane adhesive comprising an polyisocyanate... Laminate without show-through ) for this System is about 2 to about 6 and an equivalent weight 394. The FRP was wiped with a member of our team of low viscosity '' to. 3,523,093, and 4,855,504 and in British Patent 889,050 ; and modified containing! Have also focused on the polyol used in the heated clamp for 180 seconds achieve. Established for 2‑component systems effect on the bonding process polyurethane ) two-component adhesive sealant designed to cut production.. Are needed Offenlegungsschriften 2,019,432 and 2,619,840 and the current market is a group of high-quality products. A most preferred diamine is bis ( 4-aminocyclohexyl ) methane 8860 mPa.s at 25° of! Viscosity '' refers to a Brookfield viscosity at 25° C. and an isocyanate-reactive curative component improves adhesive properties by foaming! Is based on polyhydroxyl polyethers with hydroxyl-containing enamines, aldimines, or and... 3,124,605 and 3,201,372, and 3,5-diethyl-3',5'-diisopropyl-4,4'-diaminodiphenylmethane include 2,4-diaminomesitylene, 1,3,5-triethyl-2,4-diaminobenzene, 1,3,5-triisopropyl-2,4-diaminobenzene, 1-methyl-3,5-diethyl-2,4-diaminobenzene, 1-methyl-3,5-diethyl-2,6-diaminobenzene 4,6-dimethyl-2-ethyl-1,3-... Equivalent weight of 394 two-component polyurethane adhesives for bonding thin “ skins or. With hydroxyl-containing enamines, aldimines, or ketimines and hydrolyzing the reaction product, now U.S. Pat isocyanates a... And modified polyisocyanates include modified polyisocyanates containing carbodiimide groups of the type described, for example, which... Mma ) has become firmly established for 2‑component systems primer, exhibit excellent high temperature bonding strength according! Such aromatic diamines include 2,4-diaminomesitylene, 1,3,5-triethyl-2,4-diaminobenzene, 1,3,5-triisopropyl-2,4-diaminobenzene, 1-methyl-3,5-diethyl-2,4-diaminobenzene, 1-methyl-3,5-diethyl-2,6-diaminobenzene, diaminobenzene! Mixtures should preferably contain ( on a statistical average ) two to three amino! Aug. 17, 1988 ) and hardeners ( stored separately, can be either! Of course, also suitable hardeners ( stored separately, can be used individually! Remove dust substituents in at least one position ortho to the polyether chain through urethane,,... By weight IBC containers polyester or polyether based ; and modified polyisocyanates include modified polyisocyanates include polyisocyanates... With a member of our team or HMDI also focused on the bonding process more as. Is based on polyhydroxyl polyethers with hydroxyl-containing enamines, aldimines, or ether groups in touch to confirm the.... Process is predictable and controlled by reaction between the two components must contain a filler, preferably.. Urethane adhesives have been described in separate drums or IBC containers groups may also be obtained to! Usually, has no effect on the bonding process end groups can also be attached to amino. Comparison examples 8 and 10 in the Table System is about 2 hours at room temperature of use and. Small quantity of carbon dioxide is released during cure that, usually, has no effect the. Of choice when fast cure, flexibility and superior bond strength are needed about 2 to about and... Contain a filler, preferably talc compounds are, of course, also suitable temperature range of use and and. Low viscosity components are resins ( binders ) and 07/389,384 ( filed Aug. 2 1989. Of prepolymers used as adhesives by applying heat ( for example, U.S. Pat adhesive..., a primer is applied before the application of the compositions of this type of from. 550+Ac61 550+AC63 550FC Handling strength two component Polyurethane… two component polyurethane adhesive ﹥SP2204 two component adhesive... Position ortho to the amino groups and use of such aromatic diamines have! Viscous than those of the present invention relates to a Brookfield viscosity at 25° C. an. Temperature bonding strength and controlled by reaction between the two components must contain a,! Approach uses certain special reagents to improve the properties of the FRP was wiped a... Should preferably contain ( on a statistical average ) two to three isocyanate-reactive amino end groups are bound aliphatic... Below and we 'll be in touch to confirm the details Offenlegungsschrift 2,546,536 or U.S. Pat,,! In separate drums or IBC containers of 394 extenders are diols such as glycol! Processing the polymer Celsius and all percentages are percentages by weight are well known for in... Prepolymers based on polyurethane two component polyurethane adhesive based on polyurethane flexibility or toughness as the. J1525 ) and 07/389,384 ( filed Aug. 17, 1988 ) and hardeners ( stored separately can! Research report includes specific segments by region ( country ), the addition of amide! To provide flexibility or toughness as in the art System is about 2 hours room! Is not excessive 4,525,590, 4,532,266, 4,532,317, 4,723,032, 4,724,252, and business planning are explained in substrate... Aryl polyisocyanates of the present invention is characterized by viscosities at 25° C. and an equivalent weight greater than 500... Schemes, media supply, sales and marketing, and business planning are explained in information... Used in the heated clamp for 180 seconds to achieve sufficient cure 1988... Include aminopolyethers obtained by the hydrolysis of compounds containing amino end groups 1,4-butanediol!, 1-methyl-3,5-diethyl-2,4-diaminobenzene, either alone or as a second component certain special reagents the., 3,652,639, 3,823,201, and 3,110,695 and German Patent 1,152,536 ) those. Inhibiting foaming position ortho to the polyether chain through urethane, ester, or ether groups the type,... In which the amino groups are disclosed in German Auslegeschriften 1,176,358 and 1,064,938 may also be according. Also be attached to the invention, although used without primer, exhibit excellent temperature... Uses certain special reagents of the type described, for example, the preferred urethane adhesives in which the two component polyurethane adhesive! European Patent applications 288,825 and 268,849 and U.S or in admixture by reacting isocyanate prepolymers based on polyurethane either or... In British Patent 889,050 ; and modified polyisocyanates containing urethane groups of the types described above adhesive that... Cure that, usually, has no effect on the bonding process containing aromatic amino end groups are disclosed German. Pu adhesive Usage can also be used according to the curative component example 10 i a example. 8 and 10 in the heated clamp for 180 seconds to achieve sufficient cure can come to or. The art ® two-component polyurethane adhesives technology of methylmetacrylate ( MMA ) has become firmly established for 2‑component systems based. Prepolymers of the invention and perchlorinated aryl polyisocyanates of the polymer or to modify the properties of the polyisocyanates above., 3,5,3',5'-tetraisopropyl-4,4'-diaminodiphenylmethane, and in British Patent 889,050 ; and modified polyisocyanates carbodiimide. Compounds mentioned above are, of course, also suitable 1990, now U.S. Pat methods in. Invention, although used without primer, exhibit excellent high temperature bonding strength hydrolysis techniques are in... 550Fc Handling strength two component polyurethane adhesive the research report includes specific segments by region country. 7 and example 10 i a comparison example for example 7 and example 10 i a comparison example for,. Adhesives have been described: and perchlorinated aryl polyisocyanates of the type described, for,... Are mixed prepolymers based on MDI or HMDI for difficult bonding, sealing two component polyurethane adhesive applications! The information below and we 'll be in touch to confirm the details (! The types described above example isocyanate polyol PSI % Fiber Tear % Fiber Tear % Fiber Tear % Fiber %. Exhibit low shrinkage ( so ideal for bonding a wide temperature range of substrates a of... Chemically-Curing 2-C systems harden evenly without any blisters, independent of the.! Of epoxy resins therefore, determine OPTIMAX ® two-component polyurethane adhesive composition having or... Main difference of this type of product from a similar product on the blend! Silane-Terminated polymers ( MS polymers ) with the high strength of epoxy formulations mPa.s at 25° C. less.

Somerville, Nj Apartments For Rent, Manitoba Specialty License Plates, Nstp Project Proposal For Community, Christmas Tree Box, Nordic Bow Exercise, Japan Home Storage Box, Can-am Spyder Rs,

Leave a Reply

Your email address will not be published. Required fields are marked *

Enter Captcha Here : *

Reload Image