In one embodiment, an orthodontic article is described comprising the reaction product of a polymerizable composition comprising: a) 30-70 parts by weight of monofunctional (meth)acrylate monomer, wherein a cured homopolymer of at least one monofunctional (meth)acrylate monomer has a Tg of at least 30, 35, 40, 45, 50, 55, or 60° C.; and b) urethane (meth)acrylate polymer comprising polymerized units of an aliphatic polyester diol. Also described are polymerizable compositions, as well as methods and systems for making an article utilizing 3D printing.

Acid-catalyzed curable coating compositions containing 1,1-di-activated vinyl compounds are described, including multi-layer coatings. Also provided are processes for coating substrates with coating compositions comprising 1,1-di-activated vinyl N compounds. Also provided are coated articles comprising coatings formed from coating compositions comprising 1,1-di-activated vinyl compounds.

Provided is a method of manufacturing a liquid crystal panel employing a photocurable adhesive composition which causes no damage to adherends during bonding and which, when used in bonding rugged adherends, can bond the adherends without forming a gap therebetween. The photocurable adhesive composition of the inventive method comprises (A) 100 parts by mass of a urethane (meth)acrylate oligomer having a weight-average molecular weight of 20,000 to 100,000, (B) 5 parts to 70 parts by mass of a phenoxy resin, and (C) 0.1 parts to 10 parts by mass of a photopolymerization initiator. The uncured composition has a loss tangent (loss modulus/storage modulus) of less than 1 at 25° C. and the temperature at which the loss tangent of the uncured composition reaches 1 or more is 80° C. or less.

Provided is a method of manufacturing a liquid crystal panel employing a photocurable adhesive composition which causes no damage to adherends during bonding and which, when used in bonding rugged adherends, can bond the adherends without forming a gap therebetween. The photocurable adhesive composition of the inventive method comprises (A) 100 parts by mass of a urethane (meth)acrylate oligomer having a weight-average molecular weight of 20,000 to 100,000, (B) 5 parts to 70 parts by mass of a phenoxy resin, and (C) 0.1 parts to 10 parts by mass of a photopolymerization initiator. The uncured composition has a loss tangent (loss modulus/storage modulus) of less than 1 at 25° C. and the temperature at which the loss tangent of the uncured composition reaches 1 or more is 80° C. or less.

The present invention provides a dual-curable adhesive composition, comprising: component (a): an epoxy resin; at least one selected from component (b) and component (c), wherein component (b) is a (meth)acrylate monomer, and component (c) is an oligomer containing a (meth)acryloxy group; component (d): a thermal polymerization catalyst which catalyzes the thermal polymerization reaction of component (a); and component (e): a photo polymerization initiator which initiates the photo polymerization reaction of component (a) and at least one selected from component (b) and component (c), wherein component (e) is a mixture of a cationic photo polymerization initiator and a radical photo polymerization initiator. The dual-curable adhesive composition of the present invention is used for bonding or laminating a transparent substrate with another transparent substrate, or bonding or laminating a transparent substrate with a non-transparent substrate. The present invention also provides a process for bonding substrates.

The present invention provides a dual-curable adhesive composition, comprising: component (a): an epoxy resin; at least one selected from component (b) and component (c), wherein component (b) is a (meth)acrylate monomer, and component (c) is an oligomer containing a (meth)acryloxy group; component (d): a thermal polymerization catalyst which catalyzes the thermal polymerization reaction of component (a); and component (e): a photo polymerization initiator which initiates the photo polymerization reaction of component (a) and at least one selected from component (b) and component (c), wherein component (e) is a mixture of a cationic photo polymerization initiator and a radical photo polymerization initiator. The dual-curable adhesive composition of the present invention is used for bonding or laminating a transparent substrate with another transparent substrate, or bonding or laminating a transparent substrate with a non-transparent substrate. The present invention also provides a process for bonding substrates.

The invention relates to a dental composition comprising filler (F1) comprising aggregated nano-sized particles in an amount of from about 30 to about 70 wt. %, filler (F2) comprising agglomerated nano-sized particles in an amount from about 1 to about 20 wt. %, hardenable component (A1) being an urethane(meth)acrylate with a functionality of at least 2 and having a molecular weight from about 400 to about 3,000 g/mol,-hardenable component (A2) being a radically polymerizable (meth)acrylate with a functionality of at least 2 being different from component (A1), redox curing initiator system, the dental composition not comprising non-agglomerated nano-sized filler in an amount above about 10 wt. %, wt. % with respect to the weight of the whole composition. The dental composition is in particular useful as or for production of permanent crown and bridges, inlays, onlays and veneers.

The invention relates to a dental composition comprising filler (F1) comprising aggregated nano-sized particles in an amount of from about 30 to about 70 wt. %, filler (F2) comprising agglomerated nano-sized particles in an amount from about 1 to about 20 wt. %, hardenable component (A1) being an urethane(meth)acrylate with a functionality of at least 2 and having a molecular weight from about 400 to about 3,000 g/mol,-hardenable component (A2) being a radically polymerizable (meth)acrylate with a functionality of at least 2 being different from component (A1), redox curing initiator system, the dental composition not comprising non-agglomerated nano-sized filler in an amount above about 10 wt. %, wt. % with respect to the weight of the whole composition. The dental composition is in particular useful as or for production of permanent crown and bridges, inlays, onlays and veneers.

The present invention provides a multi-layer coating system, comprising a first coating composition and a second coating composition, wherein the first coating composition comprises an acrylic resin (a) having a glass transformation temperature (Tg) of at least 70° C. and the second coating composition comprises a three-functionality polyester acrylate, a six-functionality polyurethane acrylate, and a nine-functionality polyurethane acrylate. The present invention further provides a method of coating a multi-layer coating system on a substrate and a substrate coated with the multi-layer coating system.

The present invention provides a multi-layer coating system, comprising a first coating composition and a second coating composition, wherein the first coating composition comprises an acrylic resin (a) having a glass transformation temperature (Tg) of at least 70° C. and the second coating composition comprises a three-functionality polyester acrylate, a six-functionality polyurethane acrylate, and a nine-functionality polyurethane acrylate. The present invention further provides a method of coating a multi-layer coating system on a substrate and a substrate coated with the multi-layer coating system.