A purging agent that has excellent purging performance without generation of aggregate is disclosed as a purging agent used in a purging operation where a resin to be processed contains a polar group-containing thermoplastic resin. This purging agent contain a hydrocarbon-based resin, and at least one metal salt among an alkaline metal salt and alkaline earth metal salt, has a water content of 0.15% by weight or less, and includes 0.1 to 20% by weight of the metal salt expressed as the metal relative to the hydrocarbon-based resin.

An EVOH resin composition excellent in inorganic compound dispersibility and a method of producing an EVOH resin composition excellent in productivity and inorganic compound dispersibility are provided. The EVOH resin composition contains an EVOH resin (A) and an inorganic compound (B), and has a crystallinity of not lower than 36%. The EVOH resin composition is produced by: feeding an EVOH resin (A), an inorganic compound (B) and water (C) into a kneading apparatus including a screw-type side feeder (3); melt-kneading the resulting EVOH resin mixture while driving the screw-type side feeder (3); and expelling water vapor from the screw-type side feeder (3) to reduce the water content of the EVOH resin mixture to lower than 5 weight % while suppressing leakage of the EVOH resin kneaded body from the screw-type side feeder (3).

An EVOH resin composition excellent in inorganic compound dispersibility and a method of producing an EVOH resin composition excellent in productivity and inorganic compound dispersibility are provided. The EVOH resin composition contains an EVOH resin (A) and an inorganic compound (B), and has a crystallinity of not lower than 36%. The EVOH resin composition is produced by: feeding an EVOH resin (A), an inorganic compound (B) and water (C) into a kneading apparatus including a screw-type side feeder (3); melt-kneading the resulting EVOH resin mixture while driving the screw-type side feeder (3); and expelling water vapor from the screw-type side feeder (3) to reduce the water content of the EVOH resin mixture to lower than 5 weight % while suppressing leakage of the EVOH resin kneaded body from the screw-type side feeder (3).

Provided is an ethylene-vinyl alcohol copolymer with an ethylene unit content of 15 to 60 mol % and a saponification degree of 85 mol % or more.

The problem to be solved of the present invention is to provide a modified vinyl acetal resin for an interlayer film of laminated glass having excellent transparency, impact resistance, heat resistance and molding ability. The means for solving the problem is a modified vinyl acetal resin for an interlayer film of laminated glass comprising 25 to 60 mol % of ethylene units and 24 to 71% by mol of vinyl alcohol units, based on all the monomer units constituting the resin, and having the acetalization degree of 5 mol % or more and less than 40 mol %.

The problem to be solved of the present invention is to provide a modified vinyl acetal resin for an interlayer film of laminated glass having excellent transparency, impact resistance, heat resistance and molding ability. The means for solving the problem is a modified vinyl acetal resin for an interlayer film of laminated glass comprising 25 to 60 mol % of ethylene units and 24 to 71% by mol of vinyl alcohol units, based on all the monomer units constituting the resin, and having the acetalization degree of 5 mol % or more and less than 40 mol %.

An aqueous emulsion may include an ethylene-vinyl alcohol copolymer (A) as a dispersant and a polymer (B) which contains an ethylenically unsaturated monomer unit as a dispersoid, wherein the ethylene-vinyl alcohol copolymer (A) has an ethylene unit content of 1 mol % or more and less than 20 mol %; and a crystallinity in water at 30° C. (Cw (30° C.)) and a crystallinity in water at 70° C. (Cw (70° C.)) as determined by pulse NMR satisfying formula (I). Such aqueous emulsions can form fewer aggregates and exhibit excellent water-resistant adhesiveness and excellent film formability.

An aqueous emulsion may include an ethylene-vinyl alcohol copolymer (A) as a dispersant and a polymer (B) which contains an ethylenically unsaturated monomer unit as a dispersoid, wherein the ethylene-vinyl alcohol copolymer (A) has an ethylene unit content of 1 mol % or more and less than 20 mol %; and a crystallinity in water at 30° C. (Cw (30° C.)) and a crystallinity in water at 70° C. (Cw (70° C.)) as determined by pulse NMR satisfying formula (I). Such aqueous emulsions can form fewer aggregates and exhibit excellent water-resistant adhesiveness and excellent film formability.

A resin composition comprises: a modified EVOH (A) that is represented by a following formula (I), has contents (mol %) of a, b, and c based on the total monomer units satisfying following formulae (1) through (3), and has a degree of saponification (DS) defined by a following formula (4) of 90 mol % or more; and inorganic oxide particles (B), wherein a content of the inorganic oxide particles (B) is from 5 to 5000 ppm. Such a resin composition is improved in adhesion to a resin other than EVOH, secondary processability, and flexibility without decreasing the performances originally possessed by EVOH, such as gas barrier properties, transparency, flavor retention, solvent resistance, and oil resistance. Accordingly, the resin is preferably used as a molded article, a film, a sheet, a heat shrinkable film, a thermoformed article, a multilayer structure, a coinjection stretch blow molded container, a fuel container, and the like. ##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).

A resin composition comprises: a modified EVOH (A) that is represented by a following formula (I), has contents (mol %) of a, b, and c based on the total monomer units satisfying following formulae (1) through (3), and has a degree of saponification (DS) defined by a following formula (4) of 90 mol % or more; and inorganic oxide particles (B), wherein a content of the inorganic oxide particles (B) is from 5 to 5000 ppm. Such a resin composition is improved in adhesion to a resin other than EVOH, secondary processability, and flexibility without decreasing the performances originally possessed by EVOH, such as gas barrier properties, transparency, flavor retention, solvent resistance, and oil resistance. Accordingly, the resin is preferably used as a molded article, a film, a sheet, a heat shrinkable film, a thermoformed article, a multilayer structure, a coinjection stretch blow molded container, a fuel container, and the like. ##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).