Adhesive, adhesive resin composition and laminate comprising it

Patent metadata

Field	Value
Publication number	US-11248150-B2
Application number	US-201716302329-A
Country	US
Kind code	B2
Filing date	May 17, 2017
Priority date	May 19, 2016
Publication date	Feb 15, 2022
Grant date	Feb 15, 2022

Abstract

To provide an adhesive excellent in adhesion to a thermoplastic resin and an ethylene/vinyl alcohol copolymer.
An adhesive comprising a hydrolyzate of a resin composition containing a thermoplastic resin (A), a copolymer (B) of ethylene and a vinyl ester and/or an acrylic acid ester having a vinyl ester and/or acrylic acid ester content higher by at least 5 mol % than (A); and a modified product having (A) grafted by (B), and an adhesive resin composition comprising it.

First claim

The invention claimed is:

1. An adhesive comprising a hydrolysate of a resin composition containing a thermoplastic resin (A), a copolymer (B) of ethylene and a vinyl ester and/or an acrylic acid ester having a vinyl ester and/or acrylic acid ester content higher by at least 5 mol % than (A), and a modified product having (A) grafted by (B).

2. The adhesive according to claim 1 , wherein the dispersed particle size of the resin containing (A) or (B) is from 0.01 to 50 μm.

3. The adhesive according to claim 1 , wherein the thermoplastic resin (A) contains at least one member of a homopolymer and a copolymer of a C 2-12 α-olefin.

4. The adhesive according to claim 1 , wherein the thermoplastic resin (A) contains at least one copolymer of ethylene and a vinyl ester and/or an acrylic acid ester having a vinyl ester and/or acrylic acid ester content lower by at least 5 mol % than the copolymer (B) of ethylene and a vinyl ester and/or an acrylic acid ester.

5. The adhesive according to claim 1 , wherein the copolymer (B) of ethylene and a vinyl ester and/or an acrylic acid ester has a vinyl ester and/or acrylic acid ester content of from 5 to 35 mol %.

6. The adhesive according to claim 1 , which contains a crosslinking agent (C).

7. The adhesive according to claim 1 , which has a vinyl alcohol content of from 0.5 to 40 mol % and a vinyl ester and/or acrylic acid ester content of at most 30 mol %.

8. An adhesive resin composition comprising the adhesive as defined in claim 1 and a polyvinyl alcohol and/or ethylene/vinyl alcohol copolymer which satisfies the following requirement (1):
(1) an ethylene content of at most 55 mol %.

9. An adhesive resin composition comprising the adhesive as defined in claim 1 and a polyolefin.

10. A laminate comprising a layer formed from the adhesive as defined in claim 1 , and at least one layer formed from another material.

11. The laminate according to claim 10 , wherein another material is an ethylene/vinyl alcohol copolymer.

12. The laminate according to claim 10 , wherein another material is a thermoplastic resin (A).

13. A laminate comprising a layer containing an ethylene/vinyl alcohol copolymer, a layer formed from the adhesive as defined in claim 1 , and a layer containing a thermoplastic resin (A), laminated in this order.

14. A laminate comprising a layer formed from the adhesive resin composition as defined in claim 8 and a layer containing a polyolefin laminated on both sides of the layer formed from the adhesive resin composition.

15. A laminate comprising a layer containing a polyvinyl alcohol and/or ethylene/vinyl alcohol copolymer and a layer containing the adhesive resin composition as defined in claim 9 laminated on both sides of the layer containing a polyvinyl alcohol and/or ethylene/vinyl alcohol copolymer.

16. A blow molded product comprising the laminate as defined in claim 10 .

17. A sheet formed product comprising the laminate as defined in claim 10 .

18. A film formed product comprising the laminate as defined in claim 10 .

Assignees

• Tosoh Corp

Inventors

• Kawato Daisuke
• TAKAYAMA Midori
• OODAKE Makoto
• Kouda Shingo

Classifications

• C09J131/00

  Adhesives based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an acyloxy radical of a saturated carboxylic acid, of carbonic acid, or of a haloformic acid (based on hydrolysed polymers C09J129/00); Adhesives based on derivatives of such polymers · CPC title

• C09J151/00

  Adhesives based on graft polymers in which the grafted component is obtained by reactions only involving carbon-to-carbon unsaturated bonds (based on ABS polymers C09J155/02); Adhesives based on derivatives of such polymers · CPC title

• C09J133/04

  Homopolymers or copolymers of esters {(C09J143/04 takes precedence)} · CPC title

• C09J123/08

  Copolymers of ethene (C09J123/16 takes precedence) · CPC title

• C09J201/00

  Adhesives based on unspecified macromolecular compounds · CPC title