Abstract:
According to one aspect, the present disclosure relates to a curable precursor of a structural adhesive composition, comprising: a) a thermally curable resin; b) a thermal curing initiator for the thermally curable resin; c) a radiation self-polymerizable multi-functional compound comprising a polyether oligomeric backbone and at least one free-radical (co)polymerizable reactive group at each terminal position of the oligomer backbone; and d) a free-radical polymerization initiator for the radiation self-polymerizable multi-functional compound; wherein the free-radical polymerization initiator is activated by visible light.
Abstract:
Provided herein is a curable liquid stereolithography resin comprising (a) a divinylarene dioxide, such as for example a divinylbenene dioxide (DVBDO); (b) a free radically curable component, such as for example a (meth)acrylate component; (c) a cationic photoinitiator; and (d) a free radical photoinitiator. The stereolithography resin may comprise additional components, such as a cationically curable component other than a divinylarene dioxide. Preferably, the stereolithography resin has a viscosity at 25°C of less than 400 mPa·s.
Abstract:
An aqueous dispersion comprising at least one fatty acid-modified epoxy amine adduct wherein the fatty acid has an iodine number of lower than 30andat least one polymer obtained from the polymerization of one or more ethylenically unsaturated monomersand their use for forming coatings or binder agents, especially for decorative and protective coating applications on various substrates.
Abstract:
The present invention relates to novolac vinyl esters useful as thermal resistance conferring components for anaerobic curable compositions, and anaerobic curable compositions having such novolac vinyl esters. The compositions are particularly useful as adhesives and sealants.
Abstract:
Coating compositions can be prepared from an acrylic grafted polyether resin, wherein the smallest difunctional hydroxyl phenyl segment used to form the acrylic grafted polyether resin has a molecular weight greater than about 500, and wherein the smallest difunctional hydroxyl phenyl segment used to form the acrylic grafted polyether resin does not comprise two or more non-impaired hydroxyl groups attached to two or more different five-membered or six- membered carbon atom rings in a segment having a molecular weight less than about 500. The acrylic grafted polyether resin can be prepared by reacting a dihydroxyl compound and/or a diamine compound with a phenol stearic acid compound to produce a diphenol, reacting the diphenol with a diglycidyl ether compound to form a polyether resin, and mixing the polyether resin with an ethylenically unsaturated monomer component in the presence of an initiator to form the acrylic grafted polyether resin.
Abstract:
A radiation-curable composition in a liquid or solid form comprises at least one solid, non-crystalline radiation-transmissible material, dispersed in at least one cationic-curable or free-radical curable composition or mixture thereof. The solid, non-crystalline radiation-transmissible materials comprise glasses and other suitable materials that transmit (i.e, are transparent to) at least about 40% of radiation having a wavelength from about 180 to about 600 nanometers. The cationic-curable compositions comprise at least one cycloaliphatic epoxide, at least one polyol, and at least one cation-generating photoinitiator. The free-radical curable compositions comprise at least one ethylenically unsaturated compound and at least one free-radical-generating photoinitiator unless electron beam curing is used, in which case the amount of photoinitiator can be reduced or even eliminated. The solid forms of the radiation-curable compositions of the invention are useful as powder coatings for coating decorative and functional objects and that would be cured by a thermal heating flow process followed by radiation exposure. The cured compositions of the invention are useful as coatings and inks for metal, paper, plastics, glass, ceramics, and wood, as adhesives, as sealants, and as composite materials and other articles. The cured compositions of this invention also are useful in biomedical and dental applications, including prosthetic devices such as dentures; coatings, fillings, and caps for teeth; and the like.
Abstract:
A foundry binder addressing the problems of reduced flowability leading to reduced strength and providing prolonged benchlife leading to higher tensile strength is produced from (a) an epoxy resin, (b) an acrylated polyisocyanate, (c) an acrylic monomer and/or polymer and (d) an oxidizing agent. The binder is mixed with foundry aggregate and cured with a gaseous amine via a cold-box process to obtain a foundry shape useful as a mold for casting a metal article.
Abstract:
A photocurable composition which can be produced and cured through both of radical polymerization and cationic polymerization, can have a sufficiently long pot life for bonding, and can have satisfactory adhesion. The photocurable composition comprises (A) a compound having at least one radical-polymerizable unsaturated bond per molecule, (B) a compound having at least one epoxy group per molecule, (C) a radical polymerization catalyst, (D) a cationic polymerization catalyst, and (E) a compound represented by formula (1).
Abstract:
The present invention provides a thermosetting resin composition useful as an underfilling sealant composition which (1) is capable of shrinking when cured, (2) rapidly fills the underfill space in a semiconductor device, such as a flip chip assembly which includes a semiconductor chip mounted on a carrier substrate, (3) enables the semiconductor to be securely connected to a circuit board by short-time heat curing and with good productivity, and (4) demonstrates excellent heat shock properties (or thermal cycle properties). The thermosetting resin compositions of this invention which are used as underfill sealants between such a semiconductor device and a circuit board to which the semiconductor device is electrically connected, include broadly (a) an epoxy resin component; (b) a (meth)acrylate resin component; (c) an inorganic filler component; and (d) a polymerization catalytic component.