Abstract: The composition includes an acrylic monomer having a carboxylic acid group, an acrylic monomer having a hydroxyl group, at least one of an alkyl acrylate or alkyl methacrylate, and from 20 to 35 percent by weight of a compound composed of divalent segments L and at least two X groups. The divalent segments L are represented by formula L. Each segment L is respectively directly bonded to two secondary N atoms, two tertiary N atoms, or a secondary and a tertiary N atom. Each R1 represents an alkylene group having from 1 to 4 carbon atoms, and at least some of the R1 groups are —CH2—CH2—CH2—CH2—. Each X group is independently represented by the formula CH2?C(R)—C(O)—O—V—W—C(O)—. The acrylic monomer having a carboxylic acid group is present in an amount of at least one percent and less than 20 percent by weight. Articles and methods using the composition are also described.

Abstract: A free-radically polymerizable crosslinker comprising divalent segments Z represented by the formula (I). Each divalent segment Z is respectively directly bonded to i) two secondary N atoms, each further directly bonded to a divalent segment Z or an X group; ii) two tertiary N atoms, each further directly bonded to p additional divalent segments Z and (2-p) X groups, wherein p is 0, 1, or 2; or iii) a secondary N atom further directly bonded to one additional divalent segment Z or an X group, and a tertiary N atom further directly bonded to p additional divalent segments Z and (2-p) X groups. R1 represents an alkylene group having from 1 to 4 carbon atoms, n represents a positive integer. X is represented by the formula: (II) L represents a covalent bond, O, S, NR1, or a divalent linking group having from 2 to 8 carbon atoms and up to 3 oxygen atoms.

Abstract: The composition includes at least 16 percent by weight of an acrylic monomer comprising a cycloalkyl group having up to 12 carbon atoms, an acrylic monomer having a carboxylic acid group, an acrylic monomer having a hydroxyl group, and a compound composed of divalent segments L and at least two X groups. The divalent segments L are represented by formula L. Each segment L is respectively directly bonded to two secondary N atoms, two tertiary N atoms, or a secondary and a tertiary N atom. Each R1 represents an alkylene group having from 1 to 4 carbon atoms, and at least some of the R1 groups are —CH2—CH2—CH2—CH2—. Each X group is independently represented by the formula CH2?C(R)—C(O)—O—V—W—C(O)—. Articles and methods using the composition are also described.

Abstract: An orthodontic article is described comprising the reaction product of a free-radically polymerizable resin; a first free-radical photoinitiator having sufficient absorbance at a first wavelength range; and a second free-radical initiator selected from a second photoinitiator having sufficient absorbance at a second wavelength range, wherein the second wavelength range is different than the first wavelength range, or a thermal free-radical initiator. In some embodiments, the first free-radical photoinitiator exhibits a maximum absorbance at a wavelength of the range of 370-380 nm or 320-330 nm and/or comprises photoinitiator groups selected from acyl phosphine oxide or alkyl amine acetophenone. Also described are photopolymerizable compositions and methods.

Abstract: The present invention is an optically clear adhesive composition including a free-radically polymerizable acrylate or meth(acrylate) functional group oligomer, a trialkyl borane complex initiator, a photoacid generator, and a photosensitizer. A viscosity of the composition immediately after mixing and a viscosity of the composition about 24 hours after mixing changes by less than about 10%.

Abstract: A free-radically polymerizable crosslinker comprising divalent segments Z represented by the formula (I). Each divalent segment Z is respectively directly bonded to i) two secondary N atoms, each further directly bonded to a divalent segment Z or an X group; ii) two tertiary N atoms, each further directly bonded to p additional divalent segments Z and (2?p) X groups, wherein p is 0, 1, or 2; or iii) a secondary N atom further directly bonded to one additional divalent segment Z or an X group, and a tertiary N atom further directly bonded to p additional divalent segments Z and (2?p) X groups. R1 represents an alkylene group having from 1 to 4 carbon atoms, n represents a positive integer. X is represented by the formula: (II) L represents a covalent bond, O, S, NR1, or a divalent linking group having from 2 to 8 carbon atoms and up to 3 oxygen atoms.

Abstract: Curable compositions include an acrylate of Formula I: Formula I at least one multifunctional (meth)acrylate with fused aromatic groups, heteroarylene groups, heteroalkylene groups, alkylene groups, or aralkylene groups, and a photoinitiator. The compositions, when cured, have a refractive index of 1.63 or greater at 532 nanometers, are optically transparent, and have a thermal stability such that upon heating for 1 hour at 250° C. they have a weight loss of 3.5% or less.

Abstract: An electronic device is described comprising an enclosure, wherein the enclosure comprises a cured epoxy resin composition comprising at least 50 volume % of electrically non-conductive thermally conductive inorganic particles. The enclosure may be a housing of a phone, laptop, or mouse. Alternatively, the enclosure may be a case for an electronic device. Also described are epoxy resin compositions and a method of making an enclosure for an electronic device.

Abstract: Investment casting compositions are provided including: a) at least one ethylenically unsaturated monomer; b) a hydroxyl-functional poly(alkylene carbonate) polymer; c) a free-radical initiator; and d) a catalyst that aids in thermal decomposition of the hydroxyl-functional poly(alkylene carbonate) polymer. Methods of using the investment casting compositions are also provided, including: a) forming at least one investment casting pattern from an investment casting composition; b) investing the at least one investment casting pattern with at least one ceramic slurry to form a mold shell; and c) heating the mold shell to initiate decomposition of the hydroxyl-functional poly(alkylene carbonate) polymer and to form a ceramic mold. Use of these investment casting compositions tends to result in little to no cracking of the mold shell as well as allowing for significant removal of the investment casting pattern from the mold shell, upon heating of the mold shell.

Abstract: An electronic device is described comprising an enclosure, wherein the enclosure comprises a cured epoxy resin composition comprising at least 50 volume % of electrically non-conductive thermally conductive inorganic particles, wherein the inorganic particles are selected from alumina, boron nitride, silicon carbide, alumina trihydrate and mixtures thereof. The enclosure may be a housing of a phone, laptop, or mouse. Alternatively, the enclosure may be a case for an electronic device. Also described are epoxy resin compositions and a method of making an enclosure for an electronic device.

Abstract: Provided are curable (meth)acrylate structural adhesive compositions comprising a cyclic imide-containing (meth)acrylate monomer and a crosslinker, and methods, particularly methods of use.

Abstract: The composition includes an acrylic monomer having a carboxylic acid group, an acrylic monomer having a hydroxyl group, and a compound composed of divalent segments L and at least two X groups. The divalent segments L are represented by the formula Each divalent segment L is respectively directly bonded to two secondary N atoms, two tertiary N atoms, or a secondary and a tertiary N atom. Each R1 represents an alkylene group having from 1 to 4 carbon atoms, and at least some of the R1 groups are —CH2—CH2—CH2—CH2—. Each X group is independently represented by the formula CH2?C(R)—C(O)—O—V-W—C(O)—. The acrylic monomer having a carboxylic acid group is present in an amount of at least 20 percent by weight, based on the total weight of acrylic-functional compounds. Articles and a method of using the composition are also described.

Abstract: Curable ink compositions include a curable aromatic monomer composition, and surface treated metal oxide nanoparticles. The surface treated metal oxide nanoparticles are surface treated with a mixture of at least two silane-functional surface treatment agents, at least one aromatic-containing silane-functional surface treatment agent and at least one silane-functional surface treatment agent comprising a co-polymerizable group. The curable ink composition is inkjet printable, having a viscosity of 30 centipoise or less at a temperature of from room temperature to 60° C., and is free from solvents. The curable ink composition, when printed and cured, has a refractive index of 1.55 or greater, and is optically clear.

Abstract: Orthodontic articles and polymerizable resin compositions are described. The orthodontic article comprises a cured composition comprising the reaction product of free-radically polymerizable resin comprising 30 to 70 wt. %, inclusive, of at least one urethane component, and 25 to 70 wt. %, inclusive, of reactive diluent(s) comprising at least one monofunctional (meth)acrylate monomer. The polymerizable resin comprises no greater than 35 wt. % of reactive diluent(s) having a high affinity for water. Reactive diluent(s) such as monofunctional (meth)acrylate monomers having a high affinity for water have low log P values. In one embodiment, the polymerizable resin comprises at least one acidic monomer.

Abstract: A composition is described comprising a styrene-isobutylene block copolymer; and at least one ethylenically unsaturated monomer. After curing the composition comprises polymerized units of the ethylenically unsaturated monomer. In some embodiments the ethylenically unsaturated groups are selected from (meth)acryl or vinyl ether. The composition is suitable for use as a (e.g. pressure sensitive) adhesive. Articles, methods of making an article, and methods of bonding are also described.

Abstract: A composition is described comprising a styrene-isobutylene block copolymer; and at least one ethylenically unsaturated monomer. After curing the composition comprises polymerized units of the ethylenically unsaturated monomer. In some embodiments the ethylenically unsaturated groups are selected from (meth)acryl or vinyl ether. The composition is suitable for use as a (e.g. pressure sensitive) adhesive. Articles, methods of making an article, and methods of bonding are also described.

Abstract: Curable compositions comprise at least one (meth)acrylate monomer; silver; and a photoinitiator system. The photoinitiator system comprises at least one cyclic ?-diketone represented by the formula (I) or a tautomer thereof, wherein: R1 represents H or an organic moiety having from 1 to 32 carbon atoms and optionally 1 to 12 heteroatoms selected from O, N, and combinations thereof; each R2 independently represents H or an aliphatic group having from 1 to 12 carbon atoms, and up to two of oxygen and sulfur atoms; and n represents 1, 2, or 3; and at least one Type II photoinitiator. Methods of making and using the compositions are also disclosed.

Abstract: A curable composition comprises at least one monomer comprising at least one (meth)acryl group and a photoinitiator system. The photoinitiator system comprises at least one Type II photoinitiator and at least one cyclic ?-diketone represented by the formula (I) or a tautomer thereof. R1 represents an organic moiety having at least one free-radically polymerizable group. Each R2 independently represents H or an aliphatic group having from 1 to 12 carbon atoms, and up to two of oxygen and sulfur atoms, n represents 1, 2, or 3.

Abstract: Orthodontic articles and polymerizable resin compositions are described. The orthodontic article comprises a cured composition comprising the reaction product of free-radically polymerizable resin comprising 30 to 70 wt. %, inclusive, of at least one urethane component, and 25 to 70 wt. %, inclusive, of reactive diluent(s) comprising at least one monofunctional (meth)acrylate monomer. The polymerizable resin comprises no greater than 35 wt. % of reactive diluent(s) having a high affinity for water. Reactive diluent(s) such as monofunctional (meth)acrylate monomers having a high affinity for water have low log P values. In one embodiment, the polymerizable resin comprises at least one acidic monomer.

Abstract: Curable ink compositions include at least one aromatic (meth)acrylate, at least one multifunctional (meth)acrylate with heteroaromatic groups, fused aromatic groups, heteroalkylene groups, or a group containing both heteroalkylene and aromatic groups, and a photoinitiator. The curable ink composition is Inkjet printable, having a viscosity of 30 centipoise or less at a temperature of from room temperature to 35° C., and is free from solvents. The ink composition, when printed and cured has a refractive index of 1.55 or greater, and is optically clear. The cured ink composition, when cured to a thickness of from 1-16 micrometers, has a surface roughness of less than or equal to 5 nanometers.