Crosslinkable resin composition, crosslinked product, and method for producing thereof, and multilayered structure

Patent metadata

Field	Value
Publication number	US-10544248-B2
Application number	US-201715625474-A
Country	US
Kind code	B2
Filing date	Jun 16, 2017
Priority date	Jun 24, 2016
Publication date	Jan 28, 2020
Grant date	Jan 28, 2020

Abstract

The resin composition contains an ethylene-vinyl alcohol copolymer (A) and a crosslinking agent (B) with the crosslinking agent (B) in an amount of 0.6 to 15 parts by mass relative to 100 parts by mass of the ethylene-vinyl alcohol copolymer (A), the crosslinking agent (B) being a powder obtained by impregnating a porous body (BS) with a crosslinkable compound (BL) having three or more polymerizable groups and a melting point of no greater than 40° C.

First claim

The invention claimed is:

1. A resin composition comprising an ethylene-vinyl alcohol copolymer (A) and a crosslinking agent (B) with the crosslinking agent (B) in an amount of 0.6 to 15 parts by mass relative to 100 parts by mass of the ethylene-vinyl alcohol copolymer (A),
the crosslinking agent (B) being a powder obtained by impregnating a porous body (BS) with a crosslinkable compound (BL) that has three or more polymerizable groups and a melting point of no greater than 40° C.

2. The resin composition according to claim 1 , wherein the crosslinkable compound (BL) is a triazine derivative.

3. The resin composition according to claim 1 , wherein the crosslinkable compound (BL) comprises carbonyl groups and the number of carbonyl groups is equal to or greater than the number of the polymerizable groups.

4. The resin composition according to claim 1 , wherein the crosslinkable compound (BL) contains triallyl isocyanurate.

5. The resin composition according to claim 1 , wherein the porous body (BS) includes at least one selected from the group consisting of silica, alumina, diatom earth, and activated carbon.

6. The resin composition according to claim 1 , wherein the crosslinking agent (B) has a mass ratio (BL)/(BS) between the crosslinkable compound (BL) and the porous body (BS) of 20/80 to 80/20.

7. The resin composition according to claim 1 , further comprising a hindered phenol compound (C) having an ester bond or an amide bond in an amount of 0.2 to 5 parts by mass relative to 100 parts by mass of the ethylene-vinyl alcohol copolymer (A).

8. The resin composition according to claim 7 , wherein the hindered phenol compound (C) has an amide bond.

9. The resin composition according to claim 1 , wherein the composition is capable of crosslinking with an activated energy ray.

10. A crosslinked product obtained from the resin composition according to claim 1 .

11. A film formed of the crosslinked product according to claim 10 .

12. A multilayered structure comprising a layer formed of the crosslinked product according to claim 10 .

13. The multilayered structure according to claim 12 , further comprising a polyurethane type adhesive layer.

14. A retort container comprising the multilayered structure according to claim 12 or 13 .

15. A method for producing the resin composition according to claim 1 , the method comprising:
copolymerizing ethylene with a vinyl ester to give an ethylene-vinyl ester copolymer;
saponifying the ethylene-vinyl ester copolymer to give an ethylene-vinyl alcohol copolymer (A); and
mixing the ethylene-vinyl alcohol copolymer (A) with a crosslinking agent (B) that is a powder obtained by impregnating a porous body (BS) with a crosslinkable compound (BL) having three or more polymerizable groups and a melting point of no greater than 40° C., to give a mixture.

16. A method for producing the crosslinked product according to claim 10 , the method comprising:
copolymerizing ethylene with a vinyl ester to give an ethylene-vinyl ester copolymer;
saponifying the ethylene-vinyl ester copolymer to give an ethylene-vinyl alcohol copolymer (A);
mixing the ethylene-vinyl alcohol copolymer (A) with a crosslinking agent (B) that is a powder obtained by impregnating a porous body (BS) with a crosslinkable compound (BL) having three or more polymerizable groups and a melting point of no greater than 40° C., to give a mixture; and
irradiating the mixture obtained in the mixing step with an activated energy ray to obtain the crosslinked product.

Assignees

• Kuraray Co
• Kurray Co Ltd

Inventors

• Chow Edgard
• Armstrong Robert
• Yoshida Kentaro

Classifications

• C09J7/24 Primary

  based on macromolecular compounds obtained by reactions involving only carbon-to-carbon unsaturated bonds · CPC title

• C08K5/34924

  containing cyanurate groups; Tautomers thereof · CPC title

• C08K5/0025

  Crosslinking or vulcanising agents; including accelerators · CPC title

• C09J2423/046

  in the substrate · CPC title

• C08K9/04

  Ingredients treated with organic substances {(treated with macromolecular compounds C08K9/08)} · CPC title