JP2011208137A5 - - Google Patents

Claims (10)

A crosslinking agent which is used for crosslinking of an ethylene-vinyl alcohol copolymer and represented by the following formula (1).

(In the formula (1), R ¹ , R ² , R ³ , R ⁴ and R ⁵ are each independently a hydrogen atom or a hydrocarbon group which may have a substituent, and X ¹ and X ² is each independently a divalent hydrocarbon group, and n is an integer of 0 to 4. When n is an integer of 2 or more, a plurality of R ² are each independently a hydrogen atom. Or a hydrocarbon group which may have a substituent, and the plurality of X ² are each independently a divalent hydrocarbon group.) In the above formula ^{(1), R 1, R} 2 and ^{R 3} are each independently a hydrogen atom or an alkyl or alkenyl group having 2 to 8 carbon atoms having 1 to 8 carbon atoms, ^{R 4} and ^{R 5} Are each independently a hydrogen atom or an alkyl group having 1 to 4 carbon atoms, X ¹ and X ² are each independently an alkanediyl group having 1 to 6 carbon atoms, and n is 0 to 4 The crosslinking agent according to claim 1, which is an integer of In the above formula (1), R ¹ , R ² and R ³ are alkyl groups having 1 to 4 carbon atoms, R ⁴ and R ⁵ are hydrogen atoms, and X ¹ and X ² are each independently, The cross-linking agent according to claim 2, which is an alkanediyl group having 1 to 3 carbon atoms, and n is 0 or 1.   The crosslinking agent according to claim 1, 2 or 3, which has a decomposition temperature of 240 ° C or higher.   The cross-linking agent according to any one of claims 1 to 4, having a melting point of 220 ° C or lower. 6. The crosslinking agent according to claim 1, wherein the SP value is 11.0 (cal / cm ³ ) ^1/2 or more and 14.5 (cal / cm ³ ) ^1/2 or less. The SP value of the ethylene-vinyl alcohol copolymer is 9.5 (cal / cm ³ ) ^1/2 or more and 16.5 (cal / cm ³ ) ^1/2 or less. The crosslinking agent according to item 1. [A] an ethylene-vinyl alcohol copolymer having an SP value of 9.5 (cal / cm ³ ) ^1/2 or more and 16.5 (cal / cm ³ ) ^1/2 or less, and [B] from claim 1. The crosslinkable composition containing the crosslinking agent of any one of Claim 6. [A] ethylene - SP value of vinyl alcohol copolymer [B] The crosslinkable composition of claim 8 the difference between the SP value of the crosslinking agent is 2 (cal ^/ cm ³⁾ is ^1/2 or less. A crosslinked product obtained by crosslinking an ethylene-vinyl alcohol copolymer with the crosslinking agent according to any one of claims 1 to 6.