An ethylene-vinyl alcohol copolymer composition is substantially free from coloration, and contains: (A) an ethylene-vinyl alcohol copolymer; (B) a polyamide resin; and (C) an iron compound; wherein the iron compound (C) is present in an amount of 0.01 to 20 ppm on a metal basis based on the weight of the ethylene-vinyl alcohol copolymer composition.

Provided is a gas-barrier film containing: a substrate film including a vapor-deposited inorganic layer; and a cured resin layer; the gas-barrier film includes the cured resin layer on a surface of the vapor-deposited inorganic layer side of the substrate film, wherein the cured resin layer is a cured product of an epoxy resin composition containing: an epoxy resin; an epoxy resin curing agent; and non-spherical inorganic particles, and the epoxy resin curing agent is a reaction product of the following components (A) and (B): (A) at least one selected from the group consisting of meta-xylylenediamine and para-xylylenediamine; (B) at least one selected from the group consisting of prescribed unsaturated carboxylic acids and derivatives thereof. Also provided is a laminate containing the gas-barrier film.

Provided is a polyamide-based composite resin composition which includes 30 to 80 wt % of a polyamide-based resin; 5 to 59 wt % of m-xylenediamine (MXD)-based modified nylon; 10 to 50 wt % of thermoplastic olefin rubber including a maleic anhydride-grafted ethylene-octene copolymer, a maleic anhydride-grafted ethylene-propylene-diene monomer, or a mixture thereof; 0.5 to 10 wt % of clay; and 0.01 to 5 wt % of carbon nanotubes (CNTs). According to the present invention, the polyamide-based composite resin composition is easily subjected to blow molding, is excellent in mechanical properties such as low-temperature impact strength and tensile strength, and is also capable of significantly enhancing a gas barrier property.

The invention relates to a transparent, single- or multilayer, biaxially oriented polyester film, having a barrier coating on at least one film surface, wherein (a) the thickness of the biaxially oriented polyester film (exclusive of coating) is 8 m-100 m, (b) the barrier coating is the drying product of an aqueous coating dispersion or aqueous coating solution which (c) comprises at least one polyanion and at least one polyethyleneimine, where (d) the polyanion comprises neutralized acid groups which are carboxylate, phosphate and/or sulfate groups, and (e) the dry thickness d of the coating is in the range: 15 nmd200 nm, where the biaxially oriented, coated polyester film has (f) transparency88% and (g) oxygen permeation lower at least by a factor of two than that of the uncoated biaxially oriented film.

The invention further relates to a process for the production of the film, and also to use of the latter as oxygen-barrier film e.g. for food packaging in single-component packaging or in laminates for example with polyolefin films.

A polyolefin-based structure includes 60 to 97% by mass of a polyolefin (A), 1 to 35% by mass of an acid-modified polyolefin (B), and 2 to 35% by mass of a polyamide resin (C), in which the polyamide resin (C) is dispersed in a layered form in the polyolefin (A), and the polyamide resin (C) is a melt-kneaded product of 30 to 70% by mass of a polyamide (X) that contains a diamine unit containing 70 mol % or more of a m-xylylenediamine unit and a dicarboxylic acid unit containing an ,-linear aliphatic dicarboxylic acid unit and 30 to 70% by mass of an aliphatic polyamide (Y) (provided that a total of the polyamide (X) and the polyamide (Y) is taken as 100% by mass), and a difference between a melting point Tm.sub.0 of the polyamide (X) as observed by differential scanning calorimetry and a melting point Tm.sub.1 derived from the polyamide (X) in the polyamide resin (C), is 0.1 to 2.5 C.

The disclosure relates to a thermoset omniphobic composition (such as an omniphobic polyurethane or epoxy composition) which includes a thermoset polymer with first, second, and third backbone segments. The first, second, and third backbone segments can correspond to urethane or urea reaction products of polyisocyanate(s), amine-functional omniphobic polymer(s), and polyol(s), respectively, for omniphobic polyurethanes. Similarly, the first, second, and third backbone segments can correspond to urea or beta-hydroxy amine reaction products of polyamine(s), isocyanate-functional omniphobic polymer(s), and polyepoxide(s), respectively, for omniphobic epoxies. The thermoset omniphobic composition has favorable omniphobic properties, for example as characterized by water and/or oil contact and/or sliding angles. The thermoset omniphobic composition further has favorable barrier properties, for example with respect to water vapor and oxygen transmission as well as water absorption. The thermoset omniphobic composition can be used as a coating on any of a variety of substrates to provide omniphobic properties to a surface of the substrate. Such omniphobic coatings can be scratch resistant, ink/paint resistant, and optically clear.

The present invention relates to novel polymer compositions and their use in polyolefin resins. Films and rigid or semi-rigid articles made from these novel polymer compositions provide improved oxygen and/or carbon dioxide barrier protections, optical appearance and/or mechanical properties.

A gas-barrier multilayered container having (i) a layer of a propylene type polymer which chiefly includes a homopolypropylene having an isotactic index of not less than 93%, and (ii) a layer of an ethylene-vinyl alcohol copolymer having not less than two crystal melting peak temperatures. Also disclosed is a lustrous and shock-resistant multilayered container having at least (i) an outermost layer of a propylene type polymer A which chiefly includes a homopolypropylene having a melt flow rate of 2.0 to 10.0 g/10 min., and (ii) an inner layer of a propylene type polymer B which chiefly includes a homopolypropylene having a melt flow rate of not more than 1.0 g/10 min.

The present invention, in an aspect, provides a resin composition that contains a vinyl polymer and a smectite with partially immobilized lithium.

Provided is a resin composition, comprising: an ethylene-vinyl alcohol copolymer (A); an isobutylene-based copolymer (B) containing a halogen atom; and a halogen scavenger (C), wherein a mass ratio (B/A) of the isobutylene-based copolymer (B) to the ethylene-vinyl alcohol copolymer (A) is from 5/95 to 45/55, and a content of the halogen scavenger (C) is from 0.01 to 1 part by mass based on 100 parts by mass of a total of the ethylene-vinyl alcohol copolymer (A) and the isobutylene-based copolymer (B). Such a resin composition is excellent in gas barrier properties and flexibility and stably produced over a long period of time.