Dow Global Technolgoies LLC

Ddp Specialty Electronic Materials Us, LLC

Dupont Specialty Products Usa, LLC

Ddp Specialty Electronics Materials Us, Inc.

Ddp Specialty Electronic Material Us, LLC

Andreas Lutz

Daniel Schneider

Glenn G Eagle

Gary Lee Jialanella

Karsten Frick

Cathy Grossnickel

Stefan Schmatloch

Eric E Cole

Jeannine Flueckiger

Michael R Golden

Felix Koch

Irene Maeder

Isabell Wipf

Beda Steiner

Benjamin Haag

Shaoguang Feng

Yan Fei Liu

Paul Rohrer

Dietmar Golombowski

Ming Ming

Hans Schönbächler

Tyler Auvil

Marcel Aschwanden

Christof Braendli

Robert D J Froese

Lirong Zhou

Bindu Krishnan

Huide Dennis Zhu

Rajesh H Turakhia

Robert Froese

Sergio Grunder

Dakai D Ren

Yanli Feng

Ilona Caderas

Raymond F Bis

Jeannine Fluekiger

Benjamin Alexander Haag

Regina Ditschuneit

Michael Ras

Cody Clinton

Nina Hillesheim

Filippo Ardizzone

Huide D Zhu

Hans Schoenbaechler

Raymond Bis

Gary L Jialanflla

Jeannine Flückiger

Robert D Froese

A novel primerless adhesive composition with unique properties in automotive related applications, particularly in glass bonding applications; the process of making thereof.

Glass bonding adhesive with reduced slippage

An epoxy-based crash durable adhesive composition including: (I) a liquid resin system comprising: (a) at least one epoxy resin; and (b) at least one toughener; wherein the viscosity of the above liquid resin system is less than about 800 Pa s at a temperature of 15&#xb0; C.; and wherein the viscosity of the above liquid resin system is greater than about 5 Pa-s at a temperature of 60&#xb0; C.; (II) a solid material comprising: (c) at least one hydrophobic fumed silica, wherein the fumed silica is present in the adhesive composition at a concentration of greater than 5 weight percent; and (III) a curative material comprising: (d) at least one latent heat-activated curing agent; wherein the rheology of the epoxy-based crash durable adhesive composition is such that the adhesive composition is pumpable at a temperature of 15&#xb0; C. or greater; and wherein the epoxy-based crash durable adhesive composition exhibits an increase in wash-off resistance; a process for making the above adhesive composition; and a process for bonding metal substrates together with the above adhesive composition.

Adhesive composition

The invention is an epoxy resin system useful as an adhesive for high temperature applications. The system is a combination of a diglycidyl ether a bisphenol epoxy resin(s), at amounts of 30-70% by weight, with 1-10% by weight of an epoxy novolac resin 10-30% by weight of a polyurethane toughener which preferably has the terminal isocyanate functional group blocked, 1-8% by weight of a hardener, 0.1-% by weight of a cure accelerator, preferably a latent urea cure accelerator, provides the desired balance of mechanical strength and elastic modulus. The epoxy novolac resin is characterized by at least one of the following features: (i) having a viscosity at 25 degrees C. of less than 3000 mPa-s according to ASTM D-445, (ii) an average number of epoxide groups per molecule of more than 2 but less than 3.7, and (iii) a molecular weight of less than 750 g/mol.

High temperature epoxy adhesive formulations

Disclosed are one-component epoxy resin adhesive compositions which include (a) one or more non-rubber-modified epoxy resins; (b) one or more latent epoxy curing agents; (c) one or more toughening agents; and (d) zinc oxide nanoparticles. The one-component epoxy resin adhesive compositions exhibit improved toughness of the adhesive as measured by its lap shear strength as well as improved environmental stability, i.e., corrosion protection, by addition of the zinc oxide nanoparticles when applied to metal substrates.

Epoxy resin adhesive compositions

Disclosed is a composition including one or more isocyanate functional prepolymers; one or more catalysts for the reaction of isocyanate moieties and active hydrogen containing moieties; one or more mercapto silanes; one or more amino silanes, isocyanato silanes or a mixture thereof; one or more reinforcing fillers comprising one or more high surface area carbon blacks; one or more untreated calcium carbonates; one or more polyisocyanates having an isocyanate functionality of about 2 or greater; and one or more linear plasticizers. Preferably, the isocyanate functional prepolymer is prepared in the presence of at least a portion of the linear plasticizer. Preferably, the isocyanate functional polymer is prepared in the presence of a dialkyl malonate. The composition may be one-part adhesive composition. Also disclosed are methods of applying the compositions to substrates. The composition bonds primerlessly to hard to bond to coatings, such as coatings prepared from compositions including a silanated component, such as a silanated acrylopolyols, or having silica clusters.

Isocyanate functional adhesive which bonds primerless to silanated acrylic polyol based coatings

A one-component toughened epoxy-modified polyurethane and/or urea adhesive includes a mixture of dicyandiamide and a dihdyrazide as curing agents. The mixture of curing agents permits the adhesive to be cured at lower temperatures while developing good adhesive and mechanical properties in the cured adhesive.

One-component toughened epoxy adhesives containing a mixture of latent curing agents

Adhesive bonds are applied by mixing two adhesives with different properties and dispensing them to form bondlines between substrate pairs. The adhesives are then thermally cured and cooled. Varying the mix ratio permits one to vary the properties of the adhesive mixture so formed for use in bonding many different substrate pairs. The process allows potentially infinite variations of adhesive properties between those of the respective starting adhesives, simply by varying the mix ratio. The invention is especially adapted for use in manufacturing settings in which adhesives are to be applied in multiple places, but differing adhesive properties are needed among the various bonding areas.

Method for bonding using one-component epoxy adhesive mixtures

Epoxy adhesives include a latent curing agent, a reactive toughener having capped isocyanate groups, and certain urea compounds. The toughener is made by chain extending and capping a mixture of isocyanate-terminated prepolymers. The prepolymers include an isocyanate-terminated polyether and an isocyanate-terminated diene polymer. The adhesives have excellent wash-off resistance and excellent ability to adhere to oily substrates.

One-component toughened epoxy adhesives with improved adhesion to oily surfaces and high wash-off resistance

A one-component epoxy-modified polyurethane and/or urea adhesive includes very high levels of reactive urethane group- and/or urea group-containing tougheners, an epoxy resin and epoxy hardener. These adhesives are formulated to cure at high temperatures and surprisingly provide high elongations, excellent thermal stability and good adhesive properties.

One-component epoxy-modified polyurethane and/or polyurea adhesives having high elongation and excellent thermal stability, and assembly processes using same

A new polyurethane (PU) adhesive composition with encapsulated hardeners having unique properties in automotive related applications.

Dual cure 1K PU adhesive formulations using matrix encapsulated polyamines

An epoxy adhesive composition is provided that has superior wash-off resistance after pre-gelling, and may be used, for example, in manufacturing processes, for example, in the automobile industry. The composition also provides unique viscosity profile after pre-gelling to significantly reduce failure mode in subsequent processing steps. In preferred embodiments the adhesive composition comprises an epoxy type resin and a gelling agent selected from polyesterdiols and polyvinyl butyrals.

Epoxy resin compositions for pre-gel ovens

Aspects of the present invention provide a one component epoxy adhesive composition having improved impact resistance at low temperatures, such as &#x2212;40&#xb0; C. or less. In a first aspect, the adhesive includes one or more epoxy resins; at least one polyurethane based toughener; at least one amphipathic block copolymer; and one or more epoxy curing agents. In a further, aspect epoxy adhesive compositions having improved wash off resistance are also provided.

Crash durable epoxy adhesive compositions having improved low-temperature impact resistance and wash off resistance

The invention relates to resin compositions for epoxy adhesives, comprising a di-functional aromatic epoxy compound. The resin compositions and/or uncured adhesive compositions having low viscosity at low temperatures. Adhesives made therefrom have good strength and bulk properties. The invention includes methods of making and using the compositions, as well as adhesives made from the compositions.

Epoxy two-part formulations

A one-component structural adhesive comprising an isocyanate-terminated prepolymer having polymerized residues of: (a) 40 to 95 wt % of a polytetramethylene ether glycol; and (b) 5 to 60 wt % of an aliphatic diisocyanate.

One-component structural adhesive containing isocyanate-terminated prepolymer

A new polyurethane (PU) adhesive composition having unique properties in automotive related applications such as composite bonding.

Structural PU adhesive for composite bonding

Growing community of inventors

Galgenen, Switzerland

Andreas Lutz