Disclosed is an ink composition for a 3D printing supporter and a 3D printing production method using the same, in which the ink composition is usable for an inkjet 3D printer, has excellent jetting properties and is easily dissolved in water after curing so that a supporter can be easily removed. The ink composition for a 3D printing supporter comprises: an amine-containing monomer, a curing agent, and a water-soluble polymer having an amine-containing polymer.

Provided is an assembly including a first polymeric layer of a first pressure sensitive adhesive (PSA) composition and a second polymeric foam layer of a second PSA composition. The first PSA composition contains at least 60 parts by weight of (meth)acrylate copolymer containing C1-C32 (meth)acrylic acid ester monomer units; 0.1-15 parts by weight of C2-C8 hydroxyalkyl (meth)acrylic acid ester monomer units, based on 100 parts by weight of the total monomers of the (meth)acrylate copolymer; and up to 40 parts by weight of a (meth)acrylate copolymer having a weight average molecular weight above 20,000 Daltons and including (meth)acrylic acid ester monomer units. The second PSA composition contains a first (meth)acrylate copolymer having 0.1-12 wt % of (meth)acrylic acid monomer units, based on the weight of the first (meth)acrylate copolymer; and a second (meth)acrylate copolymer having 15-40 wt % of (meth)acrylic acid monomer units, based on the weight of the second (meth)acrylate copolymer.

Provided is an assembly including a first polymeric layer of a first pressure sensitive adhesive (PSA) composition and a second polymeric foam layer of a second PSA composition. The first PSA composition contains at least 60 parts by weight of (meth)acrylate copolymer containing C1-C32 (meth)acrylic acid ester monomer units; 0.1-15 parts by weight of C2-C8 hydroxyalkyl (meth)acrylic acid ester monomer units, based on 100 parts by weight of the total monomers of the (meth)acrylate copolymer; and up to 40 parts by weight of a (meth)acrylate copolymer having a weight average molecular weight above 20,000 Daltons and including (meth)acrylic acid ester monomer units. The second PSA composition contains a first (meth)acrylate copolymer having 0.1-12 wt % of (meth)acrylic acid monomer units, based on the weight of the first (meth)acrylate copolymer; and a second (meth)acrylate copolymer having 15-40 wt % of (meth)acrylic acid monomer units, based on the weight of the second (meth)acrylate copolymer.

A resin composition (X), which is a curable resin composition according to the present invention, contains a curable resin component (10), a surface-modified nanodiamond (20), and an organic medium. The surface-modified nanodiamond (20) includes a ND particle (21), which is a nanodiamond particle, and a silane coupling agent (22). The silane coupling agent (22) has a (meth)acryloyl-containing organic chain and is bonded to the ND particle (21). The resin composition (X) is suitable for forming a nanodiamond-dispersed cured resin portion having both high transparency and high scratch resistance. An optical element according to the present invention has a light-transmitting region and includes a cured resin portion, which is a cured product of the resin composition (X), in at least part of the light-transmitting region. The optical element is advantageous for actually providing an optical element including a cured resin portion or cured resin layer having both high transparency and high scratch resistance.

The multilayer coating film formation method for forming a multilayer coating film on a substrate comprises the steps of: applying an undercoat paint composition (X) comprising an antioxidant (a1) to a substrate to form at least one layer of an uncured first coating film; applying a topcoat paint composition (Y) containing a carboxy-containing polymer (b1) and an epoxy-containing acrylic resin (b2) to the first coating film to form an uncured second coating film; and simultaneously heating the uncured first coating film and the uncured second coating film to cure the films.

The multilayer coating film formation method for forming a multilayer coating film on a substrate comprises the steps of: applying an undercoat paint composition (X) comprising an antioxidant (a1) to a substrate to form at least one layer of an uncured first coating film; applying a topcoat paint composition (Y) containing a carboxy-containing polymer (b1) and an epoxy-containing acrylic resin (b2) to the first coating film to form an uncured second coating film; and simultaneously heating the uncured first coating film and the uncured second coating film to cure the films.

The present invention is directed to coated articles demonstrating a transmission of electromagnetic radiation having a frequency of 22 to 81 GHz in the range of 70% to 100%. The articles comprise substrates coated with curable film-forming compositions comprising a first film-forming polymer prepared from at least one hydrophobic monomer, a second film-forming polymer prepared from at least one hydrophobic monomer, and a curing agent. Upon application of the curable film-forming composition to the substrate to form a coating layer, the first film-forming polymer is distributed throughout the coating layer, and the concentration of the second film-forming polymer is greater at the surface of the coating layer than the concentration of the second film-forming polymer within the bulk of the coating layer. The present invention is also drawn to methods of mitigating contaminant build-up on a substrate using the curable film-forming compositions described above.

The present invention is directed to coated articles demonstrating a transmission of electromagnetic radiation having a frequency of 22 to 81 GHz in the range of 70% to 100%. The articles comprise substrates coated with curable film-forming compositions comprising a first film-forming polymer prepared from at least one hydrophobic monomer, a second film-forming polymer prepared from at least one hydrophobic monomer, and a curing agent. Upon application of the curable film-forming composition to the substrate to form a coating layer, the first film-forming polymer is distributed throughout the coating layer, and the concentration of the second film-forming polymer is greater at the surface of the coating layer than the concentration of the second film-forming polymer within the bulk of the coating layer. The present invention is also drawn to methods of mitigating contaminant build-up on a substrate using the curable film-forming compositions described above.

The invention discloses an interpenetrating biopolymers network (IPN) hydrogel loaded with herbal extracts, preparation and application thereof. The IPN hydrogel can increase the preservation time of herbal extracts and achieve a long-term release mechanism of herbal extracts. The interpenetrating biopolymers network (IPN) hydrogel makes itself have microporous and macroporous network structure and reinforced gel structure. The gel itself has good hydrophilicity and high biocompatibility.

In addition, the present invention will be subsequently applied to the development of hydrogel patches and preparation methods, which are composed of bidirectional elastic non-woven fabrics, hydrogels containing extracts and a cover film layer, and solve the common the problem of allergies caused by patches.

The invention discloses an interpenetrating biopolymers network (IPN) hydrogel loaded with herbal extracts, preparation and application thereof. The IPN hydrogel can increase the preservation time of herbal extracts and achieve a long-term release mechanism of herbal extracts. The interpenetrating biopolymers network (IPN) hydrogel makes itself have microporous and macroporous network structure and reinforced gel structure. The gel itself has good hydrophilicity and high biocompatibility.

In addition, the present invention will be subsequently applied to the development of hydrogel patches and preparation methods, which are composed of bidirectional elastic non-woven fabrics, hydrogels containing extracts and a cover film layer, and solve the common the problem of allergies caused by patches.