An aqueous emulsion is made by emulsion polymerizing at least one free-radically polymerizable monomer and one or more di- or higher-functional chain-extending monomers in the presence of an aqueous solution of an oligomer made from a mixture of free-radically polymerizable monomers including acid-functional free-radically polymerizable comonomers, adhesion-promoting free-radically polymerizable comonomers and other free-radically polymerizable comonomers. The aqueous emulsion is substantially free of adipic dihydrazide, has a minimum film forming temperature55 C., and on drying has a Koenig hardness of at least 40 sec.

The present disclosure is directed to an ultra-high solids emulsion comprising a plurality of multiphase polymer particles, in which the multiphase particles comprises an acrylic-based copolymer derived from monomers comprising an alkyl methacrylate; an alkyl acrylate; a hydroxyalkyl acrylate; at least one or more acids; a vinyl aromatic compound; and a vinyl ester or vinyl lactam, a copolymerizable surfactant, at least one or more alkylphenol ethoxylate (APE) free nonionic surfactants, and at least one or more APE free anionic surfactants in aqueous medium in the presence of an initiator and a buffer. Additionally, methods for preparing such ultra-high solids emulsion and applications of such emulsion in coatings and adhesives are disclosed.

The present disclosure is directed to an ultra-high solids emulsion comprising a plurality of multiphase polymer particles, in which the multiphase particles comprises an acrylic-based copolymer derived from monomers comprising an alkyl methacrylate; an alkyl acrylate; a hydroxyalkyl acrylate; at least one or more acids; a vinyl aromatic compound; and a vinyl ester or vinyl lactam, a copolymerizable surfactant, at least one or more alkylphenol ethoxylate (APE) free nonionic surfactants, and at least one or more APE free anionic surfactants in aqueous medium in the presence of an initiator and a buffer. Additionally, methods for preparing such ultra-high solids emulsion and applications of such emulsion in coatings and adhesives are disclosed.

An additive for a water-based wood stain includes a polymeric particle including a polymer that includes a repeating unit formed from a compound having the formula X-L.sup.1-A, wherein X is a substituted or unsubstituted (C.sub.2-C.sub.8)alkenyl containing one or more carbon-carbon double bonds, L.sup.1 is a bond, C(O)O, OC(O), or a substituted or unsubstituted (C.sub.1-C.sub.10)alkylene interrupted by 0, 1, 2, or 3 heteroatoms chosen from O and NR.sup.1 wherein R.sup.1 is H or (C.sub.1-C.sub.5)alkyl, and A is H, substituted or unsubstituted (C.sub.1-C.sub.20)hydrocarbyl, or substituted or unsubstituted phenyl. The polymeric particle has a particle size in solution of 10 nm to 2000 nm.

An additive for a water-based wood stain includes a polymeric particle including a polymer that includes a repeating unit formed from a compound having the formula X-L.sup.1-A, wherein X is a substituted or unsubstituted (C.sub.2-C.sub.8)alkenyl containing one or more carbon-carbon double bonds, L.sup.1 is a bond, C(O)O, OC(O), or a substituted or unsubstituted (C.sub.1-C.sub.10)alkylene interrupted by 0, 1, 2, or 3 heteroatoms chosen from O and NR.sup.1 wherein R.sup.1 is H or (C.sub.1-C.sub.5)alkyl, and A is H, substituted or unsubstituted (C.sub.1-C.sub.20)hydrocarbyl, or substituted or unsubstituted phenyl. The polymeric particle has a particle size in solution of 10 nm to 2000 nm.

There is provided a multilayer structure comprising a layer (A) containing an ethylene-vinyl alcohol copolymer having an ethylene unit content of 1 mol % or more and less than 20 mol %, a viscosity-average polymerization degree of 200 to 5000, and a saponification degree of 80 to 99.7 mol %, wherein a block character of ethylene units is 0.90 to 0.99; and a layer (B) containing at least one resin selected from the group consisting of a polyolefin resin, a polyester resin and a polyamide resin. Such a multilayer structure has excellent oxygen-gas barrier performance. In addition, an aqueous solution containing the ethylene-vinyl alcohol copolymer exhibits excellent viscosity stability even after long-term storage. Therefore, even after a long period of time from preparation of the aqueous solution, it can be uniformly applied to a substrate and thus, a multilayer structure having excellent oxygen-gas barrier performance can be provided.

There is provided a multilayer structure comprising a layer (A) containing an ethylene-vinyl alcohol copolymer having an ethylene unit content of 1 mol % or more and less than 20 mol %, a viscosity-average polymerization degree of 200 to 5000, and a saponification degree of 80 to 99.7 mol %, wherein a block character of ethylene units is 0.90 to 0.99; and a layer (B) containing at least one resin selected from the group consisting of a polyolefin resin, a polyester resin and a polyamide resin. Such a multilayer structure has excellent oxygen-gas barrier performance. In addition, an aqueous solution containing the ethylene-vinyl alcohol copolymer exhibits excellent viscosity stability even after long-term storage. Therefore, even after a long period of time from preparation of the aqueous solution, it can be uniformly applied to a substrate and thus, a multilayer structure having excellent oxygen-gas barrier performance can be provided.

A resist composition comprising an acid generator containing a sulfonium salt containing a sulfonic acid anion having a carbon atom to which an iodine atom is bonded and a sulfonium cation having formula (1).

##STR00001##

A resist composition comprising an acid generator containing a sulfonium salt containing a sulfonic acid anion having a carbon atom to which an iodine atom is bonded and a sulfonium cation having formula (1).

##STR00001##

The present disclosure is directed to an ultra-high solids emulsion comprising a plurality of multiphase polymer particles, in which the multiphase particles comprises an acrylic-based copolymer derived from monomers comprising an alkyl methacrylate; an alkyl acrylate; a hydroxyalkyl acrylate; at least one or more acids; a vinyl aromatic compound; and a vinyl ester or vinyl lactam, a copolymerizable surfactant, at least one or more alkylphenol ethoxylate (APE) free nonionic surfactants, and at least one or more APE free anionic surfactants in aqueous medium in the presence of an initiator and a buffer. Additionally, methods for preparing such ultra-high solids emulsion and applications of such emulsion in coatings and adhesives are disclosed.