A polymer having a first monomer operatively connected to Rose Bengal, a second monomer, and a surfactant, wherein the surfactant is selected from the group consisting of ionic surfactants, anionic surfactants, cationic surfactants, nonionic surfactants, zwitterionic surfactants, and mixtures thereof. The Rose Bengal in polymer in an amount effective for rendering the polymer antimicrobial or antiviral upon exposure of said polymer to light; and the polymer produces singlet oxygen from air in the presence of light. A substrate have these features is also included.

A water-absorbent copolymer may include a vinyl alcohol constituent unit x and a constituent unit z other than the vinyl alcohol constituent unit x and a vinyl ester constituent unit y, wherein a ratio of a content of an average sequence of the constituent unit z to a content of the constituent unit z is 50.0 mol % or less.

A water-absorbent copolymer may include a vinyl alcohol constituent unit x and a constituent unit z other than the vinyl alcohol constituent unit x and a vinyl ester constituent unit y, wherein a ratio of a content of an average sequence of the constituent unit z to a content of the constituent unit z is 50.0 mol % or less.

The present invention concerns a process for the preparation of a copolymer comprising the steps of copolymerizing under suitable reaction conditions at least one first type of olefin monomer and at least one second type of functionalized olefin monomer using a catalyst system to obtain a polyolefin main chain having one or multiple functionalized short chain branches, the catalyst system comprising: i) a single-site catalyst or catalyst precursor comprising a metal selected from Ti3+ or Cr3+; ii) a co-catalyst; iii) optionally a scavenger.

The present invention concerns a process for the preparation of a copolymer comprising the steps of copolymerizing under suitable reaction conditions at least one first type of olefin monomer and at least one second type of functionalized olefin monomer using a catalyst system to obtain a polyolefin main chain having one or multiple functionalized short chain branches, the catalyst system comprising: i) a single-site catalyst or catalyst precursor comprising a metal selected from Ti3+ or Cr3+; ii) a co-catalyst; iii) optionally a scavenger.

There is provided a multilayer structure comprising at least a barrier resin layer (X) and an inorganic barrier layer (Y) with a thickness of 500 nm or less which is adjacent to the barrier resin layer (X), wherein the layer (X) is made of a resin composition (x) comprising an ethylene-vinyl alcohol copolymer (A) and a polyamide (B) in a mass ratio (A/B) of 55/45 to 98/2, and the ethylene-vinyl alcohol copolymer (A) has an ethylene content of 20 to 46 mol % and a saponification degree of 90 mol % or more. Thus, there can be provided a multilayer structure having excellent gas barrier properties and appearance even after being subjected to stretching process or retorting process followed by bending process, and a packaging material for retort therewith.

There is provided a multilayer structure comprising at least a barrier resin layer (X) and an inorganic barrier layer (Y) with a thickness of 500 nm or less which is adjacent to the barrier resin layer (X), wherein the layer (X) is made of a resin composition (x) comprising an ethylene-vinyl alcohol copolymer (A) and a polyamide (B) in a mass ratio (A/B) of 55/45 to 98/2, and the ethylene-vinyl alcohol copolymer (A) has an ethylene content of 20 to 46 mol % and a saponification degree of 90 mol % or more. Thus, there can be provided a multilayer structure having excellent gas barrier properties and appearance even after being subjected to stretching process or retorting process followed by bending process, and a packaging material for retort therewith.

Provided is a polymethallyl alcohol copolymer having a structural unit (A) represented by the following formula (A) and a structural unit (B) represented by the following formula (B), a molar ratio (A)/(B) of the structural unit (A) to the structural unit (B) being greater than or equal to 0.5; a method of producing the copolymer; and a molding containing the copolymer. In the formula (B), X represents at least one selected from the group consisting of a hydrogen atom, an alkoxy group, a hydroxy group, and an alkyl group having 1 to 3 carbon atoms.

##STR00001##

Provided is a polymethallyl alcohol copolymer having a structural unit (A) represented by the following formula (A) and a structural unit (B) represented by the following formula (B), a molar ratio (A)/(B) of the structural unit (A) to the structural unit (B) being greater than or equal to 0.5; a method of producing the copolymer; and a molding containing the copolymer. In the formula (B), X represents at least one selected from the group consisting of a hydrogen atom, an alkoxy group, a hydroxy group, and an alkyl group having 1 to 3 carbon atoms.

##STR00001##

Provided is a polymethallyl alcohol copolymer having a structural unit (A) represented by the following formula (A) and a structural unit (B) represented by the following formula (B), a molar ratio (A)/(B) of the structural unit (A) to the structural unit (B) being greater than or equal to 0.5; a method of producing the copolymer; and a molding containing the copolymer. In the formula (B), X represents at least one selected from the group consisting of a hydrogen atom, an alkoxy group, a hydroxy group, and an alkyl group having 1 to 3 carbon atoms.

##STR00001##