摘要:
Provided is a modified ethylene-vinyl alcohol copolymer (C) having an ethylen content of 5 to 55 mol %, which contains a specific structural unit (I) in an amount of 0.3 to 40 mol % and may be obtained by reacting an ethylene-vinyl alcohol copolymer (A) with a monofunctional epoxy compound (B) having a molecular weight of not more than 500. This can be produced by a method for producing the modified ethylene-vinyl alcohol copolymer (C) which comprises melting and kneading an ethylene-vinyl alcohol copolymer (A) with a monofunctional epoxy compound (B) in an extruder. The modified ethylene-vinyl alcohol copolymer (C) is superior to a unmodified ethylene-vinyl alcohol copolymer (A) in transparency, stretchability, flexibility and flexing resistance due to the specific structural unit (I) incorporated therein, and thus, can be used as a barrier material in various applications requiring the above performance capabilities.
摘要:
Provided is a resin composition comprising 1-99% by weight of a modified ethylene-vinyl alcohol copolymer (C) having an ethylene content of 5-55 mol %, which contains a specific structural unit (I) in an amount of 0.3-40 mol % and can be obtained by reacting an ethylene-vinyl alcohol copolymer (A) with a monofunctional epoxy compound (B) having a molecular weight of not more than 500, and 1-99% by weight of a thermoplastic resin (T1) other than (C). Moreover, a multilayer structure in which the resin composition and a thermoplastic resin (T2) are laminated is also provided. Thus, a resin composition superior in barrier properties, transparency, stretchability, flexibility, flexing resistance and interlayer adhesiveness and various kinds of molded articles made thereof are provided.
摘要:
Provided is a modified ethylene-vinyl alcohol copolymer (C) having an ethylen content of 5 to 55 mol %, which contains a specific structural unit (I) in an amount of 0.3 to 40 mol % and may be obtained by reacting an ethylene-vinyl alcohol copolymer (A) with a monofunctional epoxy compound (B) having a molecular weight of not more than 500. This can be produced by a method for producing the modified ethylene-vinyl alcohol copolymer (C) which comprises melting and kneading an ethylene-vinyl alcohol copolymer (A) with a monofunctional epoxy compound (B) in an extruder. The modified ethylene-vinyl alcohol copolymer (C) is superior to a unmodified ethylene-vinyl alcohol copolymer (A) in transparency, stretchability, flexibility and flexing resistance due to the specific structural unit (I) incorporated therein, and thus, can be used as a barrier material in various applications requiring the above performance capabilities.
摘要:
Disclosed is an innerliner for pneumatic tires, wherein the innerliner comprises a modified ethylene-vinyl alcohol copolymer (C) obtained by reacting 1-50 parts by weight of an epoxy compound (B) with 100 parts by weight of an ethylene-vinyl alcohol copolymer (A) having an ethylene content of 25-50 mol %. A pneumatic tire with the innerliner can greatly improve the internal pressure retainabilities before and after driving without increasing the weight of the tire.
摘要:
Provided is a resin composition comprising 1-99% by weight of a modified ethylene-vinyl alcohol copolymer (C) having an ethylene content of 5-55 mol %, which contains a specific structural unit (I) in an amount of 0.3-40 mol % and can be obtained by reacting an ethylene-vinyl alcohol copolymer (A) with a monofunctional epoxy compound (B) having a molecular weight of not more than 500, and 1-99% by weight of a thermoplastic resin (T1) other than (C). Moreover, a multilayer structure in which the resin composition and a thermoplastic resin (T2) are laminated is also provided. Thus, a resin composition superior in barrier properties, transparency, stretchability, flexibility, flexing resistance and interlayer adhesiveness and various kinds of molded articles made thereof are provided.
摘要:
Provided is a modified ethylene-vinyl alcohol copolymer (C) having an ethylen content of 5 to 55 mol %, which contains a specific structural unit (I) in an amount of 0.3 to 40 mol % and may be obtained by reacting an ethylene-vinyl alcohol copolymer (A) with a monofunctional epoxy compound (B) having a molecular weight of not more than 500. This can be produced by a method for producing the modified ethylene-vinyl alcohol copolymer (C) which comprises melting and kneading an ethylene-vinyl alcohol copolymer (A) with a monofunctional epoxy compound (B) in an extruder. The modified ethylene-vinyl alcohol copolymer (C) is superior to a unmodified ethylene-vinyl alcohol copolymer (A) in transparency, stretchability, flexibility and flexing resistance due to the specific structural unit (I) incorporated therein, and thus, can be used as a barrier material in various applications requiring the above performance capabilities.
摘要:
A resin composition is provided which comprises from 50 to 95% by weight of a modified ethylene-vinyl alcohol copolymer (C) obtained by reacting an ethylene-vinyl alcohol copolymer (A) with a monovalent epoxy compound (B) having a molecular weight of 500 or less, and from 5 to 50% by weight of a soft resin (F) that has at least one functional group able to react with a hydroxyl group and has a Young's modulus at 23° C., 50% RH of 500 MPa or less, wherein the soft resin (F) is dispersed with an average particle diameter of 0.1 μm or less in a matrix of the modified ethylene-vinyl alcohol copolymer (C). This resin composition is excellent in barrier properties and also in flex resistance and impact resistance at low temperature.
摘要:
A resin composition is provided which comprises from 50 to 95% by weight of a modified ethylene-vinyl alcohol copolymer (C) obtained by reacting an ethylene-vinyl alcohol copolymer (A) with a monovalent epoxy compound (B) having a molecular weight of 500 or less, and from 5 to 50% by weight of a soft resin (F) that has at least one functional group able to react with a hydroxyl group and has a Young's modulus at 23° C., 50% RH of 500 MPa or less, wherein the soft resin (F) is dispersed with an average particle diameter of 0.1 μm or less in a matrix of the modified ethylene-vinyl alcohol copolymer (C). This resin composition is excellent in barrier properties and also in flex resistance and impact resistance at low temperature.
摘要:
Laminates in which a layer of a polar resin (C) is laminated with a layer of a polyolefin (D) or a recovered resin (E) via a layer of an adhesive resin composition (A), including an ethylene-vinyl alcohol copolymer, the adhesive resin composition (A) is produced by mixing a resin having an unsaturated carboxylic acid anhydride or derivative thereof (a1) with a ring-opening polymer or condensation polymer (a2) having a hydroxyl group or an amino group at both ends or at one end; or partially grafting the (a2) with the (a1).
摘要:
A shaped article including a modified ethylene-vinyl alcohol copolymer (C), wherein the modified ethylene-vinyl alcohol copolymer (C) is a product obtained by modifying an unmodified ethylene-vinyl alcohol copolymer (A) with an epoxy compound (B) having a double bond and has a degree of modification with the epoxy compound (B) of 0.1 to 10 mol % based on the monomer units of the ethylene-vinyl alcohol copolymer (A), and at least a part of the modified ethylene-vinyl alcohol copolymer (C) is crosslinked, and the gel fraction of the shaped article is 3% by weight or more. Thereby, a shaped article which contains almost no harmful crosslinking agent and which is excellent in hot water resistance, heat resistance and a gas barrier property is provided.