Disclosed is a reactive hot-melt adhesive composition, containing: a urethane prepolymer having a polymer chain including a structural unit derived from polyol and a structural unit derived from polyisocyanate, and an isocyanate group as a terminal group of the polymer chain; and a functional group protection type silane coupling agent.

The present disclosure is drawn to re-workable adhesives for electronic devices. In one example, a re-workable adhesive for an electronic device can include a hot-melt adhesive present in an amount from about 60 wt % to about 90 wt % with respect to the total weight of the re-workable adhesive. The hot-melt adhesive can have a reduced bond strength at an elevated temperature. The re-workable adhesive can also include a pressure-sensitive adhesive present in an amount from about 10 wt % to about 40 wt % with respect to the total weight of the re-workable adhesive, wherein the pressure-sensitive adhesive has a higher bond strength compared to the hot-melt adhesive when at the elevated temperature.

A method of making a roof assembly includes bringing first and second adhesive beads into contact with a roof panel and a roof stiffener to thereby define a chamber. The first adhesive bead forms a continuous perimeter around a first vacuum aperture in the roof stiffener to thereby define a first vacuum chamber. The second adhesive bead defines a second continuous perimeter around a second vacuum aperture in the roof stiffener to thereby define a second vacuum chamber. A vacuum is created in each of the first and second vacuum chambers. An outer periphery of each of the first and second adhesive beads is in direct fluid communication with the surrounding atmosphere through a perimeter opening of the chamber.

The application provides a product with a protective coating and a manufacturing method thereof. Prepare a first precursor dispersion comprising a first active organic precursor, and the first active organic precursor is a fluorine-free monomer. Prepare a second precursor dispersion comprising a second active organic precursor, and the second active organic precursor is a fluorine-containing monomer. Apply the first precursor dispersion to a product body, and dry the applied first precursor dispersion to form a first dried layer. Apply the second precursor dispersion to the first dried layer to cover the first dried layer, and dry the applied second precursor dispersion to form a second dried layer, so that the first active organic precursor and the second active organic precursor are polymerized to obtain a product with a protective coating.

Provided herein is a curable granular silicone composition which has hot-melt properties, is particularly superior in flexibility and toughness at high temperatures from room temperature to about 150° C. in cured products such as overmolding, and provides a cured product that does not easily warp or become damaged even when integrally molded with an aluminum lead frame or the like. A curable granular silicone composition comprising: (A) organopolysiloxane resin microparticles having a curing reactive functional group; (B) a functional inorganic filler; and (C) a curing agent. The composition provides, upon curing, a cured material having a storage modulus at 25° C. and 150° C. of less than 2,000 MPa and less than 100 MPa, respectively, and a peak value of tan δ represented by the storage modulus/loss modulus (G′/G″), is 0.40 or more.

Disclosed are adhesive compositions comprising a polyester polyol that includes residues of 1,4-cyclohexanedimethanol. Adhesive compositions as described herein exhibit enhanced properties over conventional adhesive compositions, and may be suitable for a wide variety of applications, including, flexible packaging, woodworking, automotive, and electronics.

Adhesive compositions comprise a polyester polyol that includes residues of at least one 2,2,4,4-tetraalkylcyclobutan e-1,3-diol, including, for example, 2,2,4,4-tetramethylcyclobutane-1,3-diol (TMCD). Adhesive compositions as described herein exhibit enhanced properties as compared to conventional adhesive compositions, and may be suitable for a wide variety of end use applications, including, flexible packaging, woodworking, automotive uses, and electronics.

A one-part thermally curable composition comprises at least one polyuretdione, thermally activatable amine curative; optional epoxy resin; optional polythiol having an average sulfhydryl group functionality of at least 2; and optional acid stabilizer. The at least one polyuretdione has an average uretdione ring functionality of at least 1.2, and is a reaction product of components comprising: a uretdione-containing material comprising a reaction product of a diisocyanate reacted with itself; a first hydroxyl-containing compound having a single OH group, wherein the first hydroxyl-containing compound is a primary alcohol or a secondary alcohol; and a second hydroxyl-containing compound having more than one OH group, wherein the second hydroxyl-containing compound is a polyol and the reaction product comprises 0.2 to 0.5, inclusive, of hydroxyl equivalents relative to isocyanate equivalents. Cured compositions and assemblies including them are also disclosed.

Provided is a polyurethane foam having excellent heat resistance and the like. The polyurethane foam is obtained from a material that contains a polyol and a polyisocyanate, in which the polyol contains a polyester polyol, the polyisocyanate contains a diphenylmethane diisocyanate-based isocyanate, it is preferable that the polyester polyol has one or more side chains composed of an alkyl group, and the polyurethane foam may be used as a soundproof material for vehicles.

One-component, moisture-curable polyurethane adhesives exhibit excellent handling strength before being fully cured, and excellent creep properties after curing. The adhesives include an isocyanate-terminated prepolymer made from polyols that include a crystalline polyester and hydroquinone bis (2-hydroxyethyl) ether, and a polyoxazolidine compound.