The present invention relates to the use of a composition comprising from 60-98 wt. % of polypropylene, from 2-40 wt. % of aromatic polycarbonate and from 0.1-10 wt. % of compatibiliser for the manufacture of a foamed article, wherein the compatibiliser is a BAB or AB type of block copolymer comprising a polypropylene block A and a polyester or polycarbonate block B, or wherein the compatibiliser is a graft copolymer of the type ABn having a polypropylene backbone A and polyester or polycarbonate block(s) B grafted thereon, with n being at least 1, and wherein the polyester or polycarbonate blocks B have an average M/F ratio from 2-25, wherein M is the number of backbone carbon atoms in the polyester or polycarbonate not including carbonyl carbon atoms, and F is the number of ester or carbonate groups in the polyester or polycarbonate block, and wherein the wt. % is based on the sum of the amount polypropylene, polycarbonate and compatibiliser.

Provided are: a gas barrier resin composition having sufficient long-run workability and superior gas barrier properties which compare favorably to those of fossil fuel-derived resins, while containing a biomass-derived raw material; a multilayer structure in which the gas barrier resin is used; and a method for producing such a gas barrier resin composition. The gas barrier resin composition contains at least one type of saponified ethylene-vinyl ester copolymer, wherein of ethylene and a vinyl ester, which are raw materials of the at least one type of saponified ethylene-vinyl ester copolymer, a part is derived from biomass, and a remainder is derived from a fossil fuel.

Provided are: a gas barrier resin composition having sufficient long-run workability and superior gas barrier properties which compare favorably to those of fossil fuel-derived resins, while containing a biomass-derived raw material; a multilayer structure in which the gas barrier resin is used; and a method for producing such a gas barrier resin composition. The gas barrier resin composition contains at least one type of saponified ethylene-vinyl ester copolymer, wherein of ethylene and a vinyl ester, which are raw materials of the at least one type of saponified ethylene-vinyl ester copolymer, a part is derived from biomass, and a remainder is derived from a fossil fuel.

A hot-water sterilized package includes a container having a barrier layer filled with contents, wherein the barrier layer contains 96 mass % or more of a modified ethylene-vinyl alcohol copolymer based on the resin total, the modified ethylene-vinyl alcohol copolymer is represented by a following formula (I), contents (mol %) of a, b, and c based on the total monomer units satisfy following formulae (1) through (3), a degree of saponification (DS) defined by a following formula (4) is 90 mol % or more, and in measurement using a differential scanning calorimeter (DSC), crystalline melting enthalpy (ΔH.sub.A: J/g) during temperature rise in a hydrated state and crystalline melting enthalpy (ΔH.sub.B: J/g) during temperature rise after drying and melting followed by rapid cooling satisfy following formulae (5) and (6). A container constituting such a package has excellent in oxygen barrier properties even after hot-water sterilization, and thus degradation of content quality is inhibited for a long period. ##STR00001##
18≤a≤55  (1)
0.01≤c≤20  (2)
[100−(a+c)]×0.9≤b≤[100−(a+c)]  (3)
DS=[(Total Number of Moles of Hydrogen Atoms in X,Y, and Z)/(Total Number of Moles of X,Y, and Z)]×100  (4)
ΔH.sub.A/ΔH.sub.B≥0.5  (5)
ΔH.sub.B≥70  (6).

A hot-water sterilized package includes a container having a barrier layer filled with contents, wherein the barrier layer contains 96 mass % or more of a modified ethylene-vinyl alcohol copolymer based on the resin total, the modified ethylene-vinyl alcohol copolymer is represented by a following formula (I), contents (mol %) of a, b, and c based on the total monomer units satisfy following formulae (1) through (3), a degree of saponification (DS) defined by a following formula (4) is 90 mol % or more, and in measurement using a differential scanning calorimeter (DSC), crystalline melting enthalpy (ΔH.sub.A: J/g) during temperature rise in a hydrated state and crystalline melting enthalpy (ΔH.sub.B: J/g) during temperature rise after drying and melting followed by rapid cooling satisfy following formulae (5) and (6). A container constituting such a package has excellent in oxygen barrier properties even after hot-water sterilization, and thus degradation of content quality is inhibited for a long period. ##STR00001##
18≤a≤55  (1)
0.01≤c≤20  (2)
[100−(a+c)]×0.9≤b≤[100−(a+c)]  (3)
DS=[(Total Number of Moles of Hydrogen Atoms in X,Y, and Z)/(Total Number of Moles of X,Y, and Z)]×100  (4)
ΔH.sub.A/ΔH.sub.B≥0.5  (5)
ΔH.sub.B≥70  (6).

The present invention relates to a semi-crystalline functionalized olefin copolymer composition and a process for the preparation of a semi-crystalline functionalized olefin copolymer composition.

The present invention relates to a semi-crystalline functionalized olefin copolymer composition and a process for the preparation of a semi-crystalline functionalized olefin copolymer composition.

An object of the present invention is to provide a diverting agent which does not completely dissolve in water and seawater in an ultra-low temperature to low temperature range (5° C. to 30° C.) for a certain period of time (about 5 minutes to 3 hours), and is quickly dissolved and removed after a certain period of time in an excavation method using a hydraulic fracturing method. The present invention relates to a diverting agent containing a polyvinyl alcohol-based resin having 2.3 mol % to 15 mol % of a hydrophilic modifying group in a molecular structure thereof.

An object of the present invention is to provide a diverting agent which does not completely dissolve in water and seawater in an ultra-low temperature to low temperature range (5° C. to 30° C.) for a certain period of time (about 5 minutes to 3 hours), and is quickly dissolved and removed after a certain period of time in an excavation method using a hydraulic fracturing method. The present invention relates to a diverting agent containing a polyvinyl alcohol-based resin having 2.3 mol % to 15 mol % of a hydrophilic modifying group in a molecular structure thereof.

An object of the invention is to provide a diverting agent which has solubility in water that can be controlled excellently and which does not easily dissolve at an early stage of filling of fractures in a well in excavation method using a hydraulic fracturing method and dissolves in water and can be easily removed after filling is no longer needed. The diverting agent of the invention contains powdery polyvinyl alcohol-based resins having an average particle diameter of 800 to 2000 μm.