Abstract: The present invention relates to a resin composition having an ethylene-vinyl alcohol copolymer (EVOH) component and a multi-layered structure containing the resin composition.

Abstract: The present invention relates to a resin composition having an ethylene-vinyl alcohol copolymer (EVOH) component and a multi-layered structure containing the resin composition.

Abstract: The present invention relates to a resin composition having an ethylene-vinyl alcohol copolymer (EVOH) component and a multi-layered structure containing the resin composition.

Abstract: A resin composition of an ethylene-vinyl alcohol copolymer adheres little to dies and ensures good long-run workability and self-purgeability and its shaped articles have good appearance with few voids and show diminished yellowing.

Abstract: Disclosed are a resin composition comprising an ethylene-vinyl alcohol copolymer and a multi-layered structure comprising the resin composition. The resin composition comprises an ethylene-vinyl alcohol copolymer, and is characterized in that, when it is heated in a nitrogen atmosphere at 220° C., its MFR (at 230° C. under a load of 10.9 kg) shows a minimum value within 10 hours after the start of heating it, and shows a maximum value (MFRmax) within 100 hours after showing its minimum value, that it contains from 0.05 to 4 ?mols/g of a carboxylic acid (A), and that it satisfies the following formulae (1) and (2): 0.5?MFRmax/MFR0?45 ??(1) 0.1?(a1)/(A)?1.0 ??(2) wherein MFRmax indicates the maximum value of MFR (at 230° C. under a load of 10.9 kg) of the resin composition heated in a nitrogen atmosphere at 220° C.; MFR0 indicates MFR (at 230° C under a load of 10.

Abstract: A dispersion stabilizer for suspension polymerization of a vinyl compound contains a modified saponified vinyl ester copolymer (A) having an ethylene content of 1 to 20 mol %, a degree of saponification of 90 mol % or more and a degree of polymerization of 100 to 3,000, a saponified vinyl ester polymer (B) having a degree of saponification of 60 to 90 mol % and a degree of polymerization of 600 to 4,000, and a saponified vinyl ester polymer (C) having a degree of saponification of 30 to 60 mol % and a degree of polymerization of 100 to 600, and in which a component (A)/{component (B)+component (C)} weight ratio if 5/95 to 40/60. The dispersion stabilizer for suspension polymerization of the vinyl compound exhibits quite excellent suspension polymerization stability. Further, the suspension polymerization of a vinyl compound using this dispersion stabilizer can produce a resin having a high bulk density minimizes the formation of milky turbid waste water.

Abstract: Provided is a polyvinyl ester resin emulsion which has high viscosity and has good water resistant adhesiveness, heat-resistant adhesiveness, hot water-resistant adhesiveness and storage stability, especially high-temperature storage stability, and which has good film-forming ability and is readily formed into transparent films. The emulsion is produced in a method of polymerizing a vinyl ester monomer in a mode of emulsion polymerization in the presence of a polyvinyl alcohol serving as protective colloid and in the presence of a water-insoluble, hydroxyl group-containing compound.

Abstract: A dispersion stabilizer for suspension polymerization of a vinyl compound containing a vinyl alcohol polymer (A) having a content of an ethylene unit of 0.5 to 10 mol %, a degree of saponification of 60 mol % or more and a degree of polymerization of 600 or more and a vinyl alcohol polymer (B) selected from the group consisting of a vinyl alcohol polymer (B1) having a content of an ethylene unit of 0.5 to 10 mol %, a degree of saponification of 20 to 80 mol % and a degree of polymerization of 100 to 600, a vinyl alcohol polymer (B2) having a degree of saponification of 20 to 60 mol % and a degree of polymerization of 100 to 600 and a vinyl alcohol polymer (B3) having a content of an ethylene unit of 0.5 to 10 mol %, a degree of saponification of 90 mol % or more and a degree of polymerization of 1,000 or more.

Abstract: A dispersion stabilizer for suspension polymerization of a vinyl compound contains a modified vinyl alcohol polymer (A) having an ethylene content of 1 to 20 mol %, a degree of saponification of 90 mol % or more and a degree of polymerization of 100 to 3,000, a vinyl alcohol polymer (B) having a degree of saponification of 60 to 90 mol % and a degree of polymerization of 600 to 4,000, and a vinyl alcohol polymer (C) having a degree of saponification of 30 to 60 mol % and a degree of polymerization of 100 to 600, and in which a component (A)/{component (B)+component (C)} weight ratio is 5/95 to 40/60. The dispersion stabilizer for suspension polymerization of the vinyl compound exhibits quite excellent suspension polymerization stability. Further, the suspension polymerization of a vinyl compound using this dispersion stabilizer can produce a resin having a high bulk density minimizes the formation of milky turbid waste water.

Abstract: The present invention relates to a resin composition having an ethylene-vinyl alcohol copolymer (EVOH) component and a multi-layered structure containing the resin composition.

Abstract: A composition comprising (A) polyvinyl alcohol having an amino group connected to a phenyl group and (B) at least one water resistance-imparting agent selected from polyepoxy compound, aldehyde compound, polyisocyanate compound, and water-soluble oxidizing agent; the composition exhibits outstanding water resistance even when used at room temperature; the composition finds use as a woodworking adhesive, plywood adhesive, and two-part instantaneously curing adhesive which does not require heating for curing.

Abstract: A polyvinyl alcohol having at least 1.9 mol % of 1,2-glycol bonds is used as a dispersant for emulsion polymerization or a dispersant for suspension polymerization, and this ensures good polymerization stability even when its amount used is reduced. The aqueous emulsion comprising the polyvinyl alcohol is resistant to water and the viscosity of the aqueous emulsion depends little on ambient temperatures. The vinylic polymers obtained through suspension polymerization in the presence of the polyvinyl alcohol are yellowed little, and the waste water in the suspension polymerization pollutes little the environment.

Abstract: Disclosed are a resin composition comprising an ethylene-vinyl alcohol copolymer and a multi-layered structure comprising the resin composition. The resin composition comprises an ethylene-vinyl alcohol copolymer which contains from 500 to 2000 ppm, in terms of the metal, of an alkali metal salt (A) and from 0.05 to 4.5 &mgr;mols/g of a carboxylic acid (B), where the ratio of the content (&mgr;mol/g) of a carboxylic acid (b1) having a molecular weight of at least 75 and its salt to the total content (&mgr;mol/g) of the carboxylic acid (B) and its salt is at least 0.1; or comprises an ethylene-vinyl alcohol copolymer which contains from 500 to 2000 ppm, in terms of the metal, of an alkali metal salt (A), from 10 to 500 ppm of a carboxylic acid (b2) having a molecular weight of smaller than 75, and from 10 to 500 ppm, in terms of the phosphate radical, of a phosphate compound (C). The resin composition has extremely good adhesiveness, and its moldings have good appearances with few gels and fish eyes.

Abstract: Provided is an aqueous emulsion comprising, as the dispersant, a polyvinyl alcohol containing from 1 to 15 mol % of ethylene units in the molecule and having a degree of hydrolysis of at least 95 mol %; and, as the dispersoid, a vinyl ester polymer. The aqueous emulsion is characterized in that, when its film is immersed in water at 20° C. for 24 hours, the degree of water solubility of the film is at most 1.5%, and the degree of water absorption of the film is at most 30%, and that the ratio of the emulsion viscosity at 60° C. (T60° C.) to the emulsion viscosity at 20° C. (T20° C.) T60° C./T20° C. is at most 2. The aqueous emulsion has good high-temperature viscosity stability (that is, this depends little on ambient temperatures and has good high-temperature storage stability), and has improved water resistance and improved low-temperature storage stability.

Abstract: Provided is a polyvinyl ester resin emulsion which has high viscosity and has good water resistant adhesiveness, heat-resistant adhesiveness, hot water-resistant adhesiveness and storage stability, especially high-temperature storage stability, and which has good film-forming ability and is readily formed into transparent films. The emulsion is produced in a method of polymerizing a vinyl ester monomer in a mode of emulsion polymerization in the presence of a polyvinyl alcohol serving as protective colloid and in the presence of a water-insoluble, hydroxyl group-containing compound.

Abstract: Disclosed are a resin composition comprising an ethylene-vinyl alcohol copolymer, and a multi-layered structure comprising the resin composition. Adhering little to dies while worked, the resin composition ensures good long-run workability and self-purgeability; and its shaped articles have good appearance with few voids and are yellowed little. The resin composition is characterized in that the profile of its intrinsic viscosity [&eegr;] in heat treatment at 220° C. in a nitrogen atmosphere satisfies the following formulae (1) to (3), and that it contains from 0.

Abstract: An acrylic molded product comprising an acrylic polymer coagulated material having excellent characteristics in impact resistance, optical properties, and hydrothermal resistance; an acrylic polymer coagulated material used for the preparation thereof; an composition comprising thereof; and a process for manufacture thereof; characterized by using an emulsion polymerization and a polymer with multiphase structured material comprising a hard phase and a soft phase and being freeze-coagulated.

Abstract: An acrylic molded product comprising an acrylic polymer coagulated material having excellent characteristics in impact resistance, optical properties, and hydrothermal resistance; an acrylic polymer coagulated material used for the preparation thereof; an composition comprising thereof; and a process for manufacture thereof; characterized by using an emulsion polymerization and a polymer with multiphase structured material comprising a hard phase and a soft phase and being freeze-coagulated.