ADHESIVE RESIN COMPOSITION AND LAMINATE

• US 20090104830A1
• Filed: 09/01/2006
• Published: 04/23/2009
• Est. Priority Date: 09/02/2005
• Status: Active Grant

• Current Assignee: Mitsubishi Chemical Corporation (Mitsubishi Chemical Group Corp.)
• Original Assignee: Mitsubishi Chemical Corporation (Mitsubishi Chemical Group Corp.)
• Inventors: Ikeda, Chikako
• Granted Patent: US 8,242,036 B2
• Time in Patent Office: Days
• US Class Current: 442/290
• CPC Class Codes: C08L 2205/02 containing two or more polymers of the same C08L -group
• CPC Class Codes: C08L 2205/03 containing three or more polymers in a blend
• CPC Class Codes: C08L 23/10 Homopolymers or copolymers of propene
• CPC Class Codes: C08L 23/142 at least partially crystalline copolymers of propene with other olefins
• CPC Class Codes: C08L 2666/02 Organic macromolecular compounds, natural resins, waxes or and bituminous materials
• CPC Class Codes: C09J 123/14 Copolymers of propene C09J123/16 takes precedence
• CPC Class Codes: Y10T 428/31692 Next to addition polymer from unsaturated monomers
• CPC Class Codes: Y10T 428/31797 Next to addition polymer from unsaturated monomers
• CPC Class Codes: Y10T 428/31909 Next to second addition polymer from unsaturated monomers
• CPC Class Codes: Y10T 442/3886 Olefin polymer or copolymer sheet or film [e.g., polypropylene, polyethylene, ethylene-butylene copolymer, etc.]
• CPC Class Codes: Y10T 442/678 Olefin polymer or copolymer sheet or film [e.g., polypropylene, polyethylene, ethylene-butylene copolymer, etc.]

Abstract

An adhesive resin composition excellent in adhesiveness and heat resistance thereof, film-forming properties, and film quality and a laminate having an adhesive resin layer made of this adhesive resin composition are provided.

The composition is an adhesive resin composition comprising 10-99.5% by weight resin ingredient (A), 0.5-30% by weight another resin ingredient (unsaturated-carboxylic-acid-modified polypropylene), and 0-89.5% by weight still another resin ingredient (olefin resin).

Resin ingredient (A): a product of successive propylene polymerization comprising 10-60% by weight (propylene homopolymer) component and 40-90% by weight (propylene/ethylene copolymer) component. The contents of room-temperature-xylene solubles derived from (a2), room-temperature-xylene insolubles derived from (a2), and room-temperature-xylene solubles derived from the same are 1-20% by weight, lower than 20% by weight, and 10-60% by weight, respectively, based on resin ingredient (A). The room-temperature-xylene solubles derived from (a2) have a content of α-olefins excluding propylene of 20% by weight or higher.

Claims

1. :

An adhesive resin composition, comprising 10-99.5% by weight the following resin ingredient (A), 0.5-30% by weight the following resin ingredient (B), and 0-89.5% by weight the following resin ingredient (C) as resin ingredients;

resin ingredient (A);

a product of a successive propylene polymerization which is a polymer comprising 10-60% by weight the following component (a1) and 40-90% by weight the following component (a2) and obtained by yielding component (a1) by a polymerization and then yielding component (a2) by a polymerization and in which the content of room-temperature-xylene solubles derived from component (a1) is 1-20% by weight based on resin ingredient (A), the content of room-temperature-xylene insolubles derived from component (a2) is lower than 20% by weight based on resin ingredient (A), the content of room-temperature-xylene solubles derived from component (a2) is 10-60% by weight based on resin ingredient (A), and the room-temperature-xylene solubles derived from component (a2) have a content of α

-olefins excluding propylene of 20% by weight or higher,

component (a1);

a propylene homopolymer or a copolymer of propylene and one or more other α

-olefins having 2-8 carbon atoms,

component (a2);

a copolymer of propylene as an essential component and one or more other α

-olefins having 2-8 carbon atoms including ethylene as another essential component;

resin ingredient (B);

a propylene homopolymer or a propylene copolymer which each has been modified with at least one unsaturated carboxylic acid and/or derivative thereof so that the content of the component derived from the unsaturated carboxylic acid and/or derivative thereof is 0.01% by weight or higher; and

resin ingredient (C);

an olefin resin.

2. :

The adhesive resin composition according to claim 1, wherein resin ingredient (B) has an MFR(180)_B of 30-1,000 g/10 min at 180°

C. and 2.16-kg load, and a ratio of the MFR(80)_B of resin ingredient (B) to a MFR(230)_A of resin ingredient (A) measured in g/10 min at 230°

C. and 2.16 kg load (MFR(180)_B/MFR(230)_A) is 1-10,000.

3. :

The adhesive resin composition according to claim 1, wherein the room-temperature-xylene solubles in component (a2) have an ethylene content of 20-40% by weight based on resin ingredient (A).

4. :

The adhesive resin composition according to claim 1, wherein component (a2) in resin ingredient (A) is a copolymer of propylene and ethylene.

5. :

The adhesive resin composition according to claim 1, wherein component (a1) in resin ingredient (A) is a propylene homopolymer.

6. :

The adhesive resin composition according to claim 1, wherein component (a1) and component (a2) in resin ingredient (A) each are a copolymer of propylene and ethylene.

7. :

The adhesive resin composition according to claim 1, wherein resin ingredient (A) has a flexural modulus of from 50 MPa to lower than 300 MPa (lower than about 3,000 kg/cm²).

8. :

The adhesive resin composition according to claim 7, wherein resin ingredient (A) has a tensile strength at yield point of 3 MPa or higher.

9. :

The adhesive resin composition according to claim 7, wherein resin ingredient (A), when examined for a melting point by the DSC method, has a peak top value Tm of 162°

C. or lower.

10. :

The adhesive resin composition according to claim 1, wherein resin ingredient (A) has the MFR(230)_A of 0.1-50 g/10 min.

11. :

The adhesive resin composition according to claim 1, wherein resin ingredient (C) is a propylene homopolymer or a copolymer of propylene and one or more α

-olefins and has a propylene content of 5-100% by weight.

12. :

A laminate comprising an adhesive resin layer made of the adhesive resin composition according to claim 1.

13. :

The laminate according to claim 12, comprising superposed layers comprising the adhesive resin layer and a layer comprising a material selected from the group consisting of polypropylene resins, polyethylene resins, ethylene/vinyl alcohol copolymer resins, polyamide resins, polyester resins, metals, paper, nonwoven fabrics, and woven fabrics.

14. :

The laminate according to claim 13, comprising the adhesive resin layer and a polyester resin layer superposed on at least one side of the adhesive resin layer.

15. :

The laminate according to claim 13, comprising the adhesive resin layer and a polyethylene resin layer superposed on at least one side of the adhesive resin layer.

16. :

The laminate according to claim 13, comprising the adhesive resin layer, a polyester resin layer superposed on one side of the adhesive resin layer, and a polyethylene resin layer superposed on the other side of the adhesive resin layer.

17. :

The laminate according to claim 14, wherein a ratio of the thickness of the adhesive resin layer to the thickness of the polyester resin layer is from 1;

100 to 1;

1.

18. :

The laminate according to claim 12, wherein a polyester resin layer is superposed on the adhesive resin layer so as to be in direct contact with the adhesive resin layer, and the strength of adhesion between the adhesive resin layer and the polyester resin layer is 70 g/cm or higher at each of measuring atmosphere temperatures of 23°

C. and 80°

C.

19. :

The laminate according to claim 18, wherein the polyester resin layer is a poly(ethylene terephthalate) layer.

20. :

The laminate according to claim 18, wherein the strength of adhesion between the layers is 100 g/cm or higher at each of measuring atmosphere temperatures of 23°

C. and 80°

C.

21. :

The laminate according to claim 20, wherein the strength of adhesion between the layers is 200 g/cm or higher at each of measuring atmosphere temperatures of 23°

C. and 80°

C.