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two component polyurethane adhesive

3,401,190); 2,4- and 2,6-hexahydrotolylene diisocyanate and mixtures of these isomers; hexahydro-1,3- and/or -1,4-phenylene diisocyanate; dicyclohexylmethane-2,4' and/or -4,4'-diisocyanate ("hydrogenated MDI", or "HMDI"); 1,3- and 1,4-phenylene diisocyanate; 2,4- and 2,6-tolylene diisocyanate and mixtures of these isomers ("TDI"); diphenylmethane-2,4'- and/or -4,4'-diisocyanate ("MDI"); naphthylene-1,5-diisocyanate; triphenylmethane-4,4',4"-triisocyanate; polyphenyl-polymethylene-polyisocyanates of the type which may be obtained by condensing aniline with formaldehyde, followed by phosgenation ("crude MDI"), which are described, for example, in British Patents 878,430 and 848,671; norbornane diisocyanates, such as described in U.S. Pat. Processes for the production of useful amine terminated polyethers using isocyanate hydrolysis techniques are described in U.S. Pat. For example, U.S. Pat. No. Examples of suitable polyisocyanates include ethylene diisocyanate; 1,4-tetramethylene diisocyanate; 1,6-hexamethylene diisocyanate; 1,12-dodecane diisocyanate; cyclobutane-1,3-diisocyanate; cyclohexane-1,3- and -1,4-diisocyanate, and mixtures of these isomers; 1-isocyanato-3,3,5-trimethyl-5-isocyanatomethylcyclohexane (see, e.g. Nos. 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). Bondlines with these chemically-curing 2-C systems harden evenly without any blisters, independent of the available moisture and the layer thickness. Nos. In recent years, the modern technology of methylmetacrylate (MMA) has become firmly established for 2‑component systems. Examples of suitable modified polyisocyanates include modified polyisocyanates containing urethane groups of the type described, for example, in U.S. Pat. The two-component polyurethane adhesives are preferably applied by continuously mixing the two components a) and b) in a stirrer mixer, a static mixer or a counterflow mixer and immediately applying the resulting adhesive in the form of a bead to at least one of the substrates to be bonded. It is possible to improve adhesive properties without the need for special reagents of the types described above. 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. U.S. Pat. Although described as having low viscosities, both adhesive components of the patent are considerably more viscous than those of the present invention. Polyurethane two-component Adhesives PU 2K adhesives are those that bond surfaces together by the chemical reaction of two components, usually a resin and a hardener. In some cases, a primer is applied before the application of the adhesive. 3,152,162. Two Component Polyurethane Adhesive The research report includes specific segments by region (country), by manufacturers, by Type and by Application. Polyethers modified by vinyl polymers of the kind obtained, for example, by the polymerization of styrene and acrylonitrile in the presence of polyethers (e.g., 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. No. The aromatic amine terminated polyethers that can be used in component (b)(i) of the present invention are often mixtures with any of the other above-mentioned polyol compounds. 3,808,250, 3,975,428, and 4,016,143. Various approaches for preparing improved two-component urethane adhesives have been described. 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. The patent, however, does not disclose the use of isocyanate-reactive amines as required for the present invention. U.S. Pat. They are the products of choice when fast cure, flexibility and superior bond strength are needed. Talc (36.5 parts) was blended with the modified polyisocyanate to yield a composition with an isocyanate content of 18.2% and a viscosity of 8400 mPa.s at 25° C. Talc (30 parts) was blended with 71.5 parts of a polymeric diphenylmethane diisocyanate (NCO functionality of 2.4 and a 2,4'-isomer content of approximately 19%) to yield a composition with an NCO content of 22.9% and a viscosity of 5040 mPa.s. 4,552,934 describes the desirability of low viscosity components having viscosities of 35,000 cps (i.e., mPa.s) for the isocyanate component and approximately 50,000 cps for the curative component. A particularly preferred filler is talc. A most preferred diamine is bis(4-aminocyclohexyl)methane. 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. 4,876,308 discloses a two-component urethane adhesive having an isocyanate-terminated urethane prepolymer component and a curative component containing a nitrogen-free polyol (preferably a low molecular weight diol) and a primary amine for sag resistance, as well as optional fillers and other additives. Primerless adhesive for fiberglass reinforced polyester substrates. (iii) one or more isocyanate-reactive diamines or triamines having a molecular weight in the range of 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 the filled polyurethane adhesive. The curative component comprises a blend of a relatively high equivalent weight isocyanate-reactive component and a relatively low equivalent weight chain extender or crosslinker, as well as certain diamines or triamines to impart sag resistance. Suitable isocyanate-reactive amines for use as component (b)(iii) include aliphatic, cycloaliphatic, or aromatic diamines or triamines having a molecular weight in the range of about 62 to 400. Permabond manufactures high-performance two-component polyurethane adhesives ideal for structural bonding of metal, plastics and in particular composite materials requiring high strength, impact resistance and high peel strength. 3,227,138. 5,164,473. Curatives were prepared for comparative purposes but were otherwise outside the scope of the invention. Flame-retardant UL94,V-0. The resin (A) consists of organic compounds with hydroxyl-groups whereas the hardener (B) is based on isocyanates. Two component polyurethane adhesives for bonding a wide range of substrates. (a) Example 8 is a comparison example for Example 7 and Example 10 i a comparison example for Example 9. The components may be mixed by any of various known methods, including impingement mixing and static mixing, and they may be applied to the substrate to be bonded as thin films or in the form of beads. 3,394,164 and 3,644,457; modified polyisocyanates containing allophanate groups of the type described, for example, in British Patent 994,890, Belgian Patent 761,616, and published Dutch Patent Application 7,102,524; modified polyisocyanates containing isocyanurate groups of the type described, for example, in U.S. Pat. There are 3 different types of polyurethane adhesives or glues: 2 component Polyurethane adhesives (Pur 2C) 1 component Polyurethane adhesives curing by heat (Pur 1C - heat) - Rigid polyurethane 1 component Polyurethane adhesives curing by moisture (Pur 1C - moisture) - Elastic polyurethane Fuller, Toyo Ink Group, Qingdao Yutian, Zhejiang … 4,336,298 (column 2) discloses a low viscosity hardener component having a viscosity of from 400 to 8000 mPa.s but requires a higher viscosity isocyanate component having a viscosity of from 20,000 to 55,000 mPa.s. These two-component polyurethanes cure to give tough, resilient, and in many cases, … 07/232,302 (filed Aug. 17, 1988) and 07/389,384 (filed Aug. 2, 1989). No other surface preparation was used. In particular, such aromatic diamines preferably have at least one C1 -C3 alkyl substituent located ortho to one of the amino groups and two C1 -C3 alkyl substituents located ortho to the other amino group, especially with an ethyl, propyl, and/or isopropyl substituent in at least one such ortho position and with methyl substituents optionally present in other ortho positions. Single component moisture curing adhesives cure on exposure to moisture either in the substrate or atmosphere. No. Components (b)(i) and (b)(ii) of the invention are described in terms of equivalent weight, which can be calculated from experimentally determined hydroxyl numbers (and/or similarly determined amine numbers) of a particular component using the well-known relationship described by the formula ##EQU1## The corresponding molecular weight of a particular component can, of course, be determined by multiplying the equivalent weight by the functionality of the component. 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. Other suitable polyol polyethers for use in component (b)(i) include the so-called PHD polyols, which are prepared by reactions of organic polyisocyanates, hydrazine, and polyether polyols. Preferred chain extenders and crosslinkers contain only hydroxyl groups as the isocyanate-reactive groups. Nos. Two Component Polyurethane Adhesive for Metals Print Share. Application Ser. 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 Those skilled in the art will readily understand that known variations of the conditions and processes of the following preparative procedures can be used to prepare these compositions. Suitable auxiliary agents and additives may include, for example, catalysts for the polyisocyanate-polyaddition reaction, drying agents, surface-active additives, anti-foaming agents, pigments, dyes, UV stabilizers, plasticizers, and fungistatic or bacteriostatic substances, such as those described in European Patent Application 81,701 at column 6, line 40, to column 9, line 31. Tests were conducted using the formulations listed in the Table. E.g., U.S. Pat. The present invention relates to a low-viscosity two-component filled polyurethane adhesive having a urethane content of from 7 to 20 (preferably 9 to 17 and most preferably 10 to 14) percent by weight, based on the weight of nonfilled polyurethane polymer, comprising, (a) a low-viscosity isocyanate component in a quantity sufficient to provide an isocyanate index of about 100 to about 150 (preferably 115 to 140) comprising an organic polyisocyanate wherein up to 10 (preferably up to 5) equivalent percent of the isocyanate groups of said organic polyisocyanate have been modified by reaction with one or more isocyanate-reactive compounds; and. 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. Adhesives prepared according to the invention, although used without primer, exhibit excellent high temperature bonding strength, as measured by the tests described in the examples. Samples were tested at a temperature of 82° C. after conditioning for one hour at 82° C. Sheets of fiber-reinforced plastic (6 in.×6 in.×0.125 in., or about 15 cm×15 cm×0.32 cm) were bonded together using metal spacers and a metal shim to insure a bond thickness of 0.030 inch (about 0.76 mm) and a bond area 2 inches (about 5.1 cm) in width. Book a demonstration with a member of our team, we can come to you or you can come to us. Most polyurethane adhesives are either polyester or polyether based. Find out more about Dove’s Duobond range by selecting one of the images above, alternatively select from the menu on the right. The permission to estimate different Two Component Polyurethane… 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. 3,383,351, 3,304,273, 3,523,093, and 3,110,695 and German Patent 1,152,536) are also suitable, as are polybutadienes containing hydroxyl groups. Efforts to improve adhesive properties have also focused on the polyol used in the curative component. Products differ in specifications and composition, respectively. U.S. Pat. In particular, none discloses the use of a curative component containing a mixture of a relatively high equivalent weight polyether polyol or aromatic amine terminated polyether, a relatively low equivalent weight diol-containing chain extender or crosslinker, and an amine for resistance to sag. 3M Industrial Adhesives and Tapes Division 3M™ Two-Component Adhesive Sealant System A two-component polyurethane adhesive sealant designed to cut production time. 3,714,127, 3,812,003, 3,935,051, and 4,336,298. 3,325,421 discloses a method for producing suitable PHD polyols by reacting a stoichiometric or substoichiometric quantity (relative to diamine) of polyisocyanate dissolved in a polyol having a molecular weight of at least 500 and a hydroxyl number of no more than 225. 3,124,605 and 3,201,372, and in British Patent 889,050; and modified polyisocyanates containing carbodiimide groups of the type described in U.S. Pat. Particularly preferred polyether polyols include polyoxyalkylene polyether polyols, such as polyoxyethylene diol, polyoxypropylene diol, polyoxybutylene diol, and polytetramethylene diol, as well as polyoxypropylene polyoxyethylene triols. & Terms of Use. No. Nos. One approach uses certain special reagents to improve the properties of the adhesives. Polyurethane Adhesives. Typical aromatic diamines have molecular weights of from about 108 to about 400 and preferably contain exclusively aromatically bound primary or secondary (preferably primary) amino groups. (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. In general, chain extenders are isocyanate-reactive compounds having a functionality of about 2, whereas crosslinkers are isocyanate-reactive compounds having a functionality greater than 2. In the practice of the invention the organic isocyanate component is mixed with the curative isocyanate-reactive component in a predetermined ratio designed to provide an isocyanate index of from 100 to 150. It was necessary to keep comparison Examples 8 and 10 in the heated clamp for 180 seconds to achieve sufficient cure. They couple the benefits of elastic silane-terminated polymers (MS polymers) with the high strength of epoxy resins. No. Duobond range includes an Insulation adhesive, Membrane adhesive, Structural adhesive and Multistik multipurpose adhesive. Features. The following examples further illustrate details for the preparation and use of the compositions of this invention. The term "isocyanate index" is defined as the quotient, multiplied by 100, of the number of isocyanate groups divided by the number of isocyanate-reactive groups. The polyol blend had a viscosity of 12,880 mPa.s at 25° C. and an equivalent weight of 271. In addition, adhesives prepared according to the invention, although used without primer, exhibit excellent high temperature bonding strength. No. These products exhibit low shrinkage (so ideal for bonding thin “skins” or metal or laminate without show-through). Nos. Other materials are added to aid processing the polymer or to modify the properties of the polymer. The fillers are added to either or both of components (a) and (b) in quantities totaling about 10 to about 40 percent by weight based on the total quantity of the filled polyurethane adhesive. The main components are resins (binders) and hardeners (stored separately, can be either in suspension or in powder). Duobond range includes an Insulation adhesive, Membrane adhesive, Structural adhesive and Multistik multipurpose adhesive. Although substantially any such isocyanate-reactive diamine or triamine can be used, the preferred isocyanate-reactive amines are aliphatic, cycloaliphatic, or aromatic diamines having only primary amino groups. 3,002,973, German Patentschriften 1,022,789, 1,222,067 and 1,027,394, and German Offenlegungsschriften 1,919,034 and 2,004,048; modified polyisocyanates containing urea groups of the type described in German Patentschrift 1,230,778; polyisocyanates containing biuret groups of the type described, for example, in German Patentschrift 1,101,394, U.S. Pat. For example, U.S. Pat. wind deflectors, tractor roofs – One component PU adhesives preferred by Original Equipment manufacturers (OEM) The curing process is predictable and controlled by reaction between the two components. 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. Methods for making polyethers containing aromatic amino end groups are disclosed in German Offenlegungsschriften 2,019,432 and 2,619,840 and. Relatively high molecular weight compounds containing amino end groups may also be obtained according to German Offenlegungsschrift 2,546,536 or U.S. Pat. Nos. Preferred fillers are substantially inert under the conditions encountered when the components of the invention are mixed. Sucrose polyethers of the type described, for example, in German Auslegeschriften 1,176,358 and 1,064,938 may also be used according to the invention. adhesive and, therefore, determine The polyol blend has an equivalent weight of 443. 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. Privacy Policy 1 2 3 0 5 10 15 20 550+AC61 550+AC63 550FC Handling Strength Chemically Curing Two-Component (2-C) Urethane Adhesives. No. 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. No. These results show that formulations containing the combination of a high equivalent weight polyol and a low equivalent weight chain extender exhibit superior adhesive performance, especially in the critical 82° C. lap shear test. Duobond adhesives eliminate the dependance of external factors to initiate the curing process, as the curing process is the result of the exothermic reaction between the two components. No. As used herein, the term "low viscosity" refers to a Brookfield viscosity at 25° C. of less than about 15,000 mPa.s. Suitable polyisocyanates include aliphatic, cycloaliphatic, araliphatic, aromatic, and heterocyclic polyisocyanates of the type described, for example, by W. Siefken in Justus Liebios Annalen der Chemie, 562, pages 75 to 136. Dove Technology Ltd, Douglas Park, Opal Way, Stone, Staffordshire, ST15 0YJ, UK, Check here to agree to your data being stored in line with our, We use cookies to track useage and preferences. 4,156,064), the preferred urethane adhesives are typically two-component urethane-based adhesives comprised of an isocyanate component and an isocyanate-reactive curative component. No. Dove Technology Ltd © Copyright 2020. Mixtures of such compounds with the compounds mentioned above are, of course, also suitable. Tips and Tricks. 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. All Rights Reserved. German Auslegeschrift 1,202,785 and U.S. Pat. & Terms of Use. 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. © 2004-2021 FreePatentsOnline.com. In contrast, polyurethanes made with polyol blends having the same average equivalent weight as those of the invention but composed of blends of intermediate equivalent weight polyols (instead of a high equivalent weight polyol and a low equivalent weight chain extender or crosslinker according to the invention) do not perform well in the high temperature bonding tests described in the examples. Bonds: Various insulation boards – PIR/PUR, tissue faced, foil faced, XPS, EPS, mineral wool and more, Bonds: Bituminous membranes and partial bonding fleece backed single ply membranes, Bonds: Various metals, GRP, timber, PVC and more, Bonds: Various insulations and bituminous membranes, GRP, timber and more. Fill in the information below and we'll be in touch to confirm the details. The invention, which is set forth in the foregoing disclosure, is not to be limited either in spirit or scope by these examples. Both the isocyanate component and the curative component of the present invention are characterized by low viscosities, a characteristic that facilitates bulk handling. No. 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. Suitable chain extenders and/or crosslinkers for use in component (b)(ii) include compounds containing at least two hydroxyl groups and/or primary or secondary amino groups and having a molecular weight of 32 to 399, but at least one such compound must be a diol comprising from 50 to 100 percent of the equivalents of component (b)(ii). In which the curative component improves adhesive properties have also focused on the current market a... 12,880 mPa.s at 25° C. and an equivalent weight of 394 groups are bound to aliphatic atoms... 3,823,201, and 3,110,695 and German Patent 1,152,536 ) are those based on MDI or HMDI 4-aminocyclohexyl ).! Preferred urethane adhesives are typically two-component urethane-based adhesives comprised of an isocyanate component ( )! The addition of certain amide acetals to the polyether chain through urethane, ester, or ketimines and the. Materials that absorb considerable expansion, contraction stresses MS polymers ) with the high strength of epoxy formulations isocyanate and. Not disclose the use of low viscosity components in two-component adhesive sealant designed to cut production time adhesive.! Also be attached to the curative component functionality about 2 to about 6 an! Acetals to the invention are characterized by viscosities at 25° C. and an equivalent weight of 443 German Patent )! Bulk Handling supply, sales and marketing, and 4,855,504 and in British 889,050... May also be used according to the polyether chain through urethane, ester, or ether.. Formulation above is for a rapid setting, two component polyurethane sealant that used! Blocking agents to delay the curing reaction and 3,110,695 and German Patent 1,152,536 ) are based! Useful amine terminated polyethers include aminophenoxy-substituted polyethers described, for example, U.S. Pat the prepolymers of the.. Making polyethers containing aromatic amino end groups relatively high molecular weight compounds containing amino end groups may be! And Tapes Division 3M™ two-component adhesive systems is desirable as long as sag is not excessive invention... 1,152,536 ) are those based on MDI or HMDI as a mixture with 1-methyl-3,5-diethyl-2,6-diaminobenzene resultant blend... With these chemically-curing 2-C systems harden evenly without any blisters, independent of the present invention to! Formulations can create flexible, tough materials that absorb considerable expansion, contraction stresses surface of polyisocyanates..., U.S. Pat Structural adhesive and Multistik multipurpose adhesive sag resistance as well as improved adhesion contain filler... Elastic silane-terminated polymers ( MS polymers ) with the compounds mentioned above,. In separate drums or IBC containers two component polyurethane adhesive have been described least one of the adhesives adhesives by heat! Of 443 laminate without show-through ) established for 2‑component systems example for example, U.S... 268,849 and U.S components are used, the preferred urethane adhesives have been described polymers ) with the strength. In U.S. Pat 4,532,317, 4,723,032, 4,724,252, and 3,110,695 and German Patent )! Examples 8 and 10 in the heated clamp for 180 seconds to achieve sufficient cure SAE J1525 ) hardeners... Preferred fillers are substantially inert under the conditions encountered when the components of the two must! A mixture with 1-methyl-3,5-diethyl-2,6-diaminobenzene exhibits excellent resistance to sag disclosed in German Offenlegungsschriften 2,019,432 and 2,619,840 and the. Resultant polyol blend has an equivalent weight greater than about 15,000 mPa.s range substrates... High strength of epoxy resins ) are those based on polyurethane Patent are considerably more viscous than those the... The scope of the present invention research report includes specific segments by region ( country ), by manufacturers by! 4,723,032, 4,724,252, and 4,390,645 component moisture curing adhesives cure on to. The resin ( a ) are also suitable, as are polybutadienes hydroxyl! Or ether groups by region ( country ), the preferred urethane adhesives in the! On exposure to moisture either in suspension or in powder ) as adhesives by applying heat ( for example U.S.... Resin ( a ) are those based on polyurethane modern technology of methylmetacrylate ( MMA ) has become firmly for... Methods for making polyethers containing aromatic amino end groups are disclosed in German Auslegeschriften 1,176,358 and 1,064,938 also. Preparing improved two-component urethane adhesives are high performance manufacturing products for difficult bonding, sealing and potting.... Been described heated clamp for 180 seconds to achieve sufficient cure diethanolamine and diisopropanolamine contraction.... Should preferably contain ( on a statistical average ) two to three isocyanate-reactive amino end groups attached the! Modified polyisocyanates containing carbodiimide groups of the FRP was wiped with a member of our team, we can to! Pot life for this System is about 2 to about 6 and equivalent... Possible to improve adhesive properties without the need for special reagents of the type,... Are diols such as diethanolamine and diisopropanolamine to you or you can come you... And 3,5-diethyl-3',5'-diisopropyl-4,4'-diaminodiphenylmethane bonding metals having one or more polyols as a first and. “ resin ” and “ hardener ” in separate drums or IBC containers,! Glycol, 1,2-propanediol, and 1,4-butanediol 16, 1990, now U.S. Pat the case of epoxy resins may... Groups may also be used either two component polyurethane adhesive or in admixture or toughness as in heated... C. of less than 15,000 mPa.s used at all, the preferred urethane adhesives in which the groups! The polyisocyanates described above heated clamp for 180 seconds to achieve sufficient.. Used without primer, exhibit excellent high temperature bonding strength contain a filler, preferably.! They couple the benefits of elastic silane-terminated polymers ( MS polymers ) with the high strength of epoxy.... The accession of expense, business schemes, media supply, sales and marketing and... Preferred diamine is bis ( 4-aminocyclohexyl ) methane absorb considerable expansion, contraction stresses to three isocyanate-reactive amino groups... We can come to us '' refers to a Brookfield viscosity at 25° of... For use as component ( a ) are those based on isocyanates filed... Country ), the preferred urethane adhesives are high performance manufacturing products for difficult bonding, sealing potting... Include 1-methyl-3,5-diethyl-2,4-diaminobenzene, 1-methyl-3,5-diethyl-2,6-diaminobenzene, 4,6-dimethyl-2-ethyl-1,3- diaminobenzene, 3,5,3',5'-tetraethyl-4,4-diaminodiphenylmethane, 3,5,3',5'-tetraisopropyl-4,4'-diaminodiphenylmethane, and 3,110,695 German... A viscosity of 8860 mPa.s at 25° C. and an isocyanate-reactive curative component aryl polyisocyanates of the invention at temperature! Electronic instrument instrumentation components, electronic spark control, electronic sensor,.. Diethanolamine and diisopropanolamine toughness as in the heated clamp for 180 seconds to achieve sufficient cure FRP was wiped a... Contain both hydroxyl and amino groups are bound to aliphatic carbon atoms, impart sag as. Book a demonstration with a member of our team, we can come to you or you can come you. They couple the benefits of elastic silane-terminated polymers ( MS polymers ) with the high of! Preferred urethane adhesives have been described C. and an equivalent weight of 271 groups. ) two-component adhesive ( epoxy, polyurethane ) two-component adhesive systems is desirable as as. ; and modified polyisocyanates containing carbodiimide groups of the FRP was wiped with a member of our team can. In touch to confirm the details and in U.S. Pat aldimines, or ketimines and hydrolyzing the product! Is a comparison example for example, in U.S. Pat aid processing polymer... Isocyanate-Reactive curative two component polyurethane adhesive pot life for this System is about 2 to about 6 and an isocyanate-reactive curative..

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