KR20020034183A - Low Activation Temperature Adhesive Composition with High Peel Strength and Cohesive Failure - Google Patents

Abstract

The present invention (a) 0 to 90 parts by weight of a polyolefin; (b) 5-95 parts by weight of functional polyolefin; (c) 5 to 40 parts by weight of polystyrene; And (d) a starting composition comprising 1 to 30 parts by weight of an elastomer, wherein the total amount of components (a), (b), (c) and (d) in the resin composition is 100 parts by weight). to provide. In another embodiment, component (a) is a non-olefinic copolymer and component (c) is impact resistant polystyrene. Such resin compositions are useful as adhesives for metal and polyolefin substrates.

Description

Low Activation Temperature Adhesive Composition with High Peel Strength and Cohesive Failure}

It is well known that acid-modified or anhydride-modified polymers are useful as adhesives for binding metals and polyolefins, but there is a need for adhesives that not only have high binding strength to both metals and polyolefins but also can activate bonds at relatively low temperatures. . Typically, currently commercially available modified polyolefins have a low binding force to the metals or polyolefins at low temperatures when combined with the metals or polyolefins, or the bonds are not activated. In addition, since the adhesive composition intended to activate the bond at low temperatures is generally a soft and viscous material, it is difficult to handle the composition with an unfixed film in the thermal lamination process and a very expensive release film to prevent sticking. You may need In addition, most existing adhesives tend to lose a significant amount of bonding over time after being used. This phenomenon is referred to in the art as "age-down."

There are a number of patents in the art for adhesive compositions, but these prior art patents do not satisfy all aspects mentioned herein. Examples of such prior art patents are US Pat. Nos. 5,516,583, 4,861,676, 4,861,677, 4,552,819, and 5,965,255.

One example of the prior art is U.S. Patent No. 5,225,482 to Nakagawa et al. On July 6, 1993, which is an ethylene-vinyl acetate copolymer, a styrene polymer resin, a graft-modified polyethylene, a polystyrene elastomer And an adhesive composition comprising an ethylene-α-olefin copolymer. It does not disclose the use of impact resistant polystyrene as a styrene resin in blending with an olefin / non-olefin copolymer.

It has been found in the present invention that the formulation of the adhesive composition of the present invention solves many or all of the above problems. The adhesive composition of the present invention binds to both metals and polyolefins, activates bonding even at relatively low temperatures, and can be easily handled as a self-supporting or coextruded film that does not require interleaf paper or release paper. In addition, the adhesive composition was found to be 100% cohesive fracture in the peel test. Cohesive fracture is a desirable property in view of high bond strength, and a high cohesive fracture means that the bond strength is greater than the adhesive strength of the adhesive. In addition, the cohesive fracture provides a convenient visual test method for verifying that the multilayer structure is properly bonded when no other test method is readily available. There seems to be a strong correlation between retentions.

Accordingly, the present invention provides an adhesive composition having good adhesion to metallic substrates and many polymeric materials, resulting in an adhesive layer having a high peel strength. In addition, the adhesive composition of the present invention can be used for the manufacture of building panels at relatively low activation temperatures.

The adhesive composition of the present invention may be supplied as an adhesive resin in pellet form or as an adhesive film.

<Overview of invention>

Thus, in one aspect of the invention

(a) 0 to 90 parts by weight of polyolefin,

(b) 5-95 parts by weight of functional polyolefin,

(c) 5 to 40 parts by weight of polystyrene, and

(d) 0 to 30 parts by weight of elastomer

A resin composition prepared by mixing a starting material, wherein the total amount of the components (a), (b), (c) and (d) in the resin composition is 100 parts by weight) is provided.

In the second aspect of the invention

(a) 0 to 90 parts by weight of the non-olefin copolymer,

(b) 5-95 parts by weight of functional polyolefin,

(c) 5 to 40 parts by weight of impact resistant polystyrene, and

(d) 0 to 30 parts by weight of elastomer

A resin composition prepared by mixing a starting material, wherein the total amount of the components (a), (b), (c) and (d) in the resin composition is 100 parts by weight) is provided.

The present invention relates to novel resin and adhesive compositions, and in particular to low temperature activated adhesive compositions that can be used as self-supporting films or coextruded or extruded onto a substrate.

Preferred embodiments of the invention will be described with reference to the following figures, wherein like numerals represent like parts in the several figures,

1A and 1B are schematic views showing a five layer laminate structure made using one embodiment of the adhesive composition of the present invention.

The present invention will be described with reference to preferred embodiments.

Preferred resin and adhesive compositions of the invention described herein are melt blends of multiple polymers. These adhesives can be used in a variety of applications and have several properties depending on the particular application. The field of use of these preferred adhesives is in the construction industry to manufacture metal panels in the form of composite structures in which a polyolefin core such as polyethylene is combined with a metal substrate such as steel or aluminum. Preferred adhesive compositions of the invention are used to bond a metal substrate to a polyethylene core.

When used as such, it is important to provide the adhesive layer with good adhesion of the polyolefin to the metal substrate. In addition, the adhesive is preferably cohesive and broken in the state of being attached to the substrate during use, and should be relatively easy to blend and use. It has been found that the adhesive composition of the present invention provides excellent adhesion to metallic substrates and many polymeric materials. This adhesive composition is 100% cohesive fracture in a peel test. This adhesive composition can be used as a freestanding film for easy handling and processing.

Preferred adhesive compositions of the invention are activated at lower temperatures than the adhesives currently used to make building panels. For preferred adhesive compositions, the activation temperature can be lowered to about 125 ° C. By lowering the activation temperature, the use of a protective layer on the painted surface (required to prevent smearing of the paint at high temperatures) can be eliminated from the manufacturing process, which results in significant cost savings and safe operation in panel manufacturing.

In one aspect, the resin composition of the present invention

(a) 0 to 90 parts by weight of polyolefin,

(b) 5-95 parts by weight of functional polyolefin,

(c) 5 to 40 parts by weight of polystyrene, and

(d) 0 to 30 parts by weight of elastomer

Wherein the total amount of the components (a), (b), (c) and (d) in the resin composition is 100 parts by weight.

In a second aspect, the resin composition of the present invention

(a) 0 to 90 parts by weight of the non-olefin copolymer,

(b) 5-95 parts by weight of functional polyolefin,

(c) 5 to 40 parts by weight of impact resistant polystyrene, and

(d) 0 to 30 parts by weight of elastomer

Wherein the total amount of the components (a), (b), (c) and (d) in the resin composition is 100 parts by weight.

In the present patent specification, the term "polyolefin" means homopolymers and copolymers of olefins. More specifically, homopolymers include polymers consisting of single unsaturated olefins having 2 to 20 carbon atoms, such as polyethylene, polypropylene or polybutene and the like. Copolymers of olefins include polymers consisting of one or more unsaturated or polyunsaturated hydrocarbons of 2 to 20 carbon atoms. Examples include ethylene / propylene copolymers, ethylene / butene copolymers, ethylene / hexene copolymers, ethylene / octene copolymers, ethylene / styrene copolymers, ethylene / butene / octene copolymers, ethylene / propylene / norbornadiene air Copolymers and propylene / butene copolymers are included, but are not limited to these.

In this patent specification, the term "non-olefin copolymer" means an olefin copolymer with monomers other than olefins. Non-olefins that can be copolymerized with olefins, especially ethylene, include vinyl acetate, unsaturated anhydrides such as acrylate or methacrylate esters having 1 to 20 carbon atoms, maleic anhydride or itaconic anhydride, maleic acid, fumaric acid, acrylic acid, methacrylic Unsaturated acids such as acids or itaconic acid are included, but are not limited to these. Examples of copolymers of olefins and non-olefins include, but are not limited to, ethylene / vinyl acetate, ethylene / methylacrylate and ethylene / butylacrylate. These polymers can be prepared by methods well known in the art, including the use of metallocene catalysts, Ziegler Natta catalysts and other catalysts useful in "low pressure" polymerization processes. In contrast, these polymers may be prepared in "high pressure" polymerization processes using free radical initiators and the like. Mixtures and blends of polyolefins may also be used.

In the present patent specification, the term "functional polyolefin" means a polyolefin or non-olefin copolymer having a specific functional group capable of reacting to form a covalent bond or an ionic bond. Functional polyolefins include "grafted polyolefins" as defined below.

The term "grafted polyolefin" refers to grafted with at least one monomer selected from ethylenically unsaturated carboxylic acids and ethylenically unsaturated carboxylic anhydrides (less preferably including derivatives of these acids), and mixtures thereof. Polyolefin, non-olipene copolymers, or mixtures or blends of polyolefins and / or non-olefin copolymers. Examples of these acids and anhydrides that may be mono-, di- or polycarboxylic acids include acrylic acid, methacrylic acid, maleic acid, fumaric acid, itaconic acid, crotonic acid, itaconic anhydride, maleic anhydride and substituted maleic anhydride ( For example, dimethyl maleic anhydride), citrotonic anhydride, nadic anhydride, methyl hydride anhydride, and tetrahydrophthalic anhydride, maleic anhydride is particularly preferred. Examples of derivatives of unsaturated acids include salts, amides, imides and esters such as mono- and disodium maleate, acrylamide, glycidyl methacrylate and dimethyl fumarate. It is well known in the art and can be prepared by a variety of processes, including thermal grafting in an extruder or other mixing device, grafting in solution, or grafting in a fluidized bed reactor. In addition, blends or mixtures of graft polyolefins may be used.

In the present patent specification, the term "polystyrene" means a homopolymer of styrene or alpha methylstyrene or a copolymer of styrene with an unsaturated monomer such as ethylene, butene, butadiene or isoprene. Specific examples include, but are not limited to, ethylene / styrene random or block copolymers, ethylene / butadiene random or block copolymers, and hydrogenated and partially hydrogenated butadiene / styrene copolymers. Useful polystyrenes are also further modified to improve impact properties, commonly referred to as impact resistant polystyrene, ie HIPS. In addition, blends and mixtures of polystyrenes can also be used. Specific examples include high performance styrenics sold by Nava Chemicals and ethylene / styrene copolymers sold under the tradename Index by Dow Chemical. However, the present invention is not limited thereto.

In the present patent specification, the term "elastomer" also means polyolefins or polystyrenes, but is distinguished from the polyolefins or polystyrenes described above in that it is relatively low in crystallinity, that is, relatively amorphous. Elastomers as defined herein will have a heat of fusion less than 30 Joules / g, measured at a heating rate of 10 ° C. per minute by differential scanning calorimetry (DSC). For example, the polyolefin elastomer may be a copolymer of ethylene and alpha olefins, including low density metallocene ethylene / butene copolymers sold under the trade name "Exact" by ExxonMobil. Or metallocene ethylene / octene copolymers sold under the name "Engage" by DuPont Dow Elastomers. Ethylene / propylene copolymers sold under the trade name "Vistalon" by ExxonMobil and ethylene / alpha olefins sold under the trade name "Tafmer" by Mitsui. Copolymers, or ethylene / propylene / norbornadiene copolymers sold under the name “Nordel” by DuPont Dow Elastomers. Also included are polybutene rubber and polyisobutylene. Examples of polystyrene elastomers are di-block and tri-block copolymers sold under the trade name "Kraton" by Shell, or "Stereon®" by Firestone. Marketed under the name ")".

In addition to the components mentioned above, the preferred adhesive compositions of the present invention are conventionally used and may contain small amounts of other components well known in the adhesive art. Such materials include primary and secondary antioxidants, stabilizers, slip additives, anti-sticking additives such as silica or talc, dyes, provided that these additives do not adversely affect the adhesive quality of the compositions of the present invention. Pigments and tackifying resins, such as those described in Kirk Othmer, Encyclopedia of Chemical Technology.

The adhesive composition of the present invention can be melt blended in a twin screw extruder and then pelletized again, as is well known in the art. These melt blended resins can then be converted and applied by various techniques and processes. For example, the adhesive can be converted to a film by a cast or blown film die extrusion technique, which adhesive film can be laminated to a suitable substrate such as metal or polyolefin. Alternatively, the adhesive composition may be coextruded with the other polyolefin as a surface layer on one or both surfaces of the polyolefin to produce a more economical adhesive film.

Alternatively, a coextruded film may be produced by incorporating a polar barrier resin such as polyamide, ethylene vinyl alcohol copolymer (EVOH) or polyester using the adhesive composition of the present invention to directly bond to the polar barrier material. have. These adhesive films can be laminated on various substrates by heat activation of this adhesive film. Heat activation may be by a variety of methods, including but not limited to direct contact with a heated plate or roller, absorbing infrared energy, heating directly in an oven, or activating via RF frequency or microwave irradiation. Can be done.

In another application of the adhesive composition of the present invention, the adhesive can be coated directly onto the substrate by methods well known in the art including, for example, extrusion lamination, extrusion coating, coextrusion lamination and coextrusion coating. The adhesive compositions of the present invention can be used to bind polar barrier resins such as EVOH, polyamides or polyesters. Also bonded to metals such as steel, aluminum, copper and brass and polyolefins such as polyethylene, ethylene copolymers and polypropylene It can also be used to

In one embodiment of the invention,

(a) 0 to 90 parts by weight, more preferably 20 to 60 parts by weight, of linear low-density polyethylene (e.g., Eclectic from ExxonMobil or Sclair® commercially available from Nova Chemicals) part,

(b) 5 to 95 parts by weight, more preferably 10 to 30 parts by weight, of maleic anhydride graft polyethylene (e.g., Fusabond®, available from DuPont);

(c) from 5 to 40 parts by weight, more preferably from 10 to 35 parts by weight of impact-resistant polystyrene (e.g., commercially available as high performance styrene) from Nova Chemicals;

(d) 0 to 30 parts by weight, more preferably 10 to 25, of an ethylene-propylene diene rubber compound (e.g., Nordel IP, commercially available from DuPont-Dow Elastomers). Parts by weight

There is provided a resin composition prepared from a starting material containing (wherein the total amount of components (a), (b), (c) and (d) in the resin composition is 100 parts by weight).

In a second embodiment of the invention,

(a) ethylene vinyl acetate copolymers, preferably comprising from 3 to 40% by weight of vinyl acetate, more preferably from 5 to 30% by weight (e.g., suitable ethylene vinyl acetate copolymers are Commercially available under the trade name) 0 to 90 parts by weight, more preferably 40 to 60 parts by weight,

(b) 5 to 95 parts by weight, more preferably 10 to 30 parts by weight of maleic anhydride graft polyethylene (e.g., fusabond available from DuPont),

(c) 5 to 40 parts by weight, more preferably 10 to 35 parts by weight of impact resistant polystyrene (e.g., high performance styrene) available from Nova Chemicals;

(d) 0 to 30 parts by weight, more preferably 10 to 25 parts by weight of an ethylene-propylene diene rubber compound (eg, Nordel IP commercially available from DuPont-Dow Elastomers)

An adhesive composition is provided, wherein the total amount of components (a), (b), (c) and (d) in the resin composition is 100 parts by weight).

In these two preferred embodiments of the invention, polyisobutylene can be used in place of ethylene-propylene diene elastomer compounds. In addition, polystyrene-styrene-butadiene elastomers having different butadiene contents with similar effects can be used.

Each component of the adhesive composition of the present invention preferably provides specific properties to the final adhesive. Low melting point polyolefins, such as polyethylene or ethylene vinyl acetate copolymers, increase the low activation temperature properties of the adhesive. Graft polymers primarily allow the adhesive composition to bind better to the metal substrate. The elastomeric component increases resistance to debonding and increases the toughness of the final adhesive composition. Finally, the polystyrene components provide not only good cohesive failure properties but also surprisingly higher binding properties.

Preferred adhesive compositions of the present invention may have a melt flow rate of 0.1 to 100 dg / min, more preferably 0.5 to 50 dg / min, most preferably 0.8 to 25 dg / min as measured by ASTM-1238E. The maximum melting point measured by DSC can be from 55 ° C. to 140 ° C., depending on the composition.

Preferred adhesives of the present invention are useful in the production of aluminum and steel building panels because of their unique combination of high peel strength, low surface tack and low temperature bonding when processed into films.

The examples below show the surprising advantages of using polystyrenes such as impact resistant polystyrene (HIPS) to provide additional peel strength, cohesive failure properties and non-stick adhesive films.

<Example 1>

Table 1 shows Compositions 1A, 1B and 1C with impact resistant polystyrene (“HIPS”) of 0 wt%, 10 wt% and 20 wt%, respectively. These compositions were initially dry blended and injected into a small co-rotating twin screw extruder. The molten blended material was pelleted and then blown to produce a film having an average thickness of about 75 microns. The film was then used as the adhesive layer to make a five-layer composite structure as shown in FIGS. 1A and 1B. Aluminum was treated in aludyne and was 0.38 mm thick. The polyethylene core used was a low density polyethylene (LDPE) sheet with a thickness of 2 mm.

The structures were laminated as follows in an electrothermal press (see FIGS. 1A and 1B).

Preheat the 5-layer structure at 1-100 ° C. for 4.5 minutes.

2- Apply 5 kgf / cm 2 pressure at 135 ° C. for 20 seconds.

3- Release the pressure and let stand for 1.5 minutes at 135 ° C in the press.

4- Cool the sample to air at room temperature.

The peel strength (ASTM 1876) of the composite structure was then measured using an Instron® instrument.

The following conditions were used during the peel strength test.

i) crosshead speed: 100 mm / min

ii) Peel Mode: 180 °

The conditions of were used.

The last two columns of Table 1 show the results indicating that the peel strength and fracture mode increased by 0 wt% to 20 wt% depending on the amount of the component d (HIPS). Comparing Composition 1A with Compositions 1B and 1C, the surprising effect of increasing the peel strength due to the presence of the polystyrene HIPS component can be seen. It is also very desirable to achieve cohesive failure (polyethylene and aluminum 50/50 respectively). Sample 1C shows 80% cohesive failure compared to the adhesive failure in the other two compositions.

Single Layer Ethylene Vinyl Acetate (EVA) Based Adhesive Identification number (a) Component weight% (b) Component weight% (c) Component weight% (d) Component weight% (e) Component weight% Peel Strength kgf / 25mm Destruction way 1A 49.9 30.0 20.0 0.0% 0.1 16.4 Adhesive to aluminum 1B 39.9 30.0 20.0 10.0 0.1 23.6 Adhesive to aluminum 1C 29.9 30.0 20.0 20.0 0.1 29.8 80% cohesive (a) Component = Ethylene vinyl acetate (EVA) copolymer having a VA content of 12% and a MI of 2.5 dg / min. (b) Component = 0.9 weight% grafted maleic anhydride and a MI of 2.5 dg / min linear low density polyethylene ( LLDPE) (c) Component = Ethylene / propylene / Norbornadiene (EPDM) Elastomer (d) with Mooney Viscosity 20 Component (d) Polybutadiene Impact Modified Polystyrene (HIPS) Elastomer (e) Component = Hindered Poly Phenolic Antioxidant Stabilizer

<Example 2>

Samples were prepared as described in Example 1, but a blown film co-extruded with polyethylene / adhesive was made and used in place of pure adhesive film to lower the adhesive usage cost. Coextruded together compositions 2A, 2B and 2C and linear low density polyethylene (LLDPE) to prepare LLDPE-adhesives (each layer having a thickness of 25 microns). The results are summarized in Table 2. As can be seen from the comparison of 1C and 2A (29.8 vs. 16.5 kgf / 25mm, respectively), coextruded films generally exhibit lower peel strengths, but they are still practical. When the impact resistant polystyrene was added at a level of 30% by weight (2C), lower peel strength was shown. Although not the best, the latter composition is still practical.

Two Layered Ethylene Vinyl Acetate (EVA) / Polyethylene Adhesive Identification number (a) Component weight% (b) Component weight% (c) Component weight% (d) Component weight% (e) Component weight% Peel Strength kgf / 25mm Destruction way 2A 29.9 30.0 20.0 20.0 0.1 16.5 100% cohesive 2B 44.9 20.0 15.0 20.0 0.1 17.5 100% cohesive 2C 34.9 20.0 15.0 30.0 0.1 10.9 100% cohesive (a) Component = metallocene ethylene butene polymer with density 0.905 and MI 4.5 dg / min Component (b) Component = high density polyethylene (HDPE) (c) with 1.0 wt% maleic anhydride and 11 dg / min MI Component = Ethylene / Propylene / Norbornadiene Copolymer (EPDM) Elastomer with Mooney Viscosity 20 (d) Component = Polybutadiene Impact Modified Polystyrene (HIPS) Elastomer (e) Component = Hindered Polyphenol Antioxidant Stabilizer

<Example 3>

In this example, the composition was made using metallocene linear low density polyethylene as the base resin. Table 3 summarizes the composition. Samples 3A, 3B and 3C were prepared as described in Examples 1 and 2. The last two compositions of 3D and 3E were prepared in two steps, making them more similar to actual commercial production. The adhesives of 3D and 3E were initially laminated to aluminum at a pressure of 8.5 kgf / cm 2 at 149 ° C. for 30 seconds. These pre-laminated aluminum sheets were then pressed with preheated LDPE cores at 132 ° C. at a pressure of 8.5 kgf / cm 2 for 10 seconds. Peel test was performed at a 90 ° angle, unlike 180 ° used in other examples. Composition 3D was a repeat of 3C and used to compare and perform other lamination and testing methods. The 3D sample showed much lower peel strength than 3C because the 180 ° peel test was used instead of the 90 ° peel test of the 3C sample.

Once the amount of impact resistant modified polystyrene (HIPS) was further increased from 0% to 20% by weight (compare 3A to 3C samples), the isolation strength was significantly increased. In addition, the failure mode was improved and more cohesive. 3E samples containing 30% HIPS exhibited high peel strength values (20.5 kgf / 25 mm in 90 ° peel mode) and 0.0% cohesive failure. It should be noted that when using the " low lamination temperature "

Metallocene LLDPE Base Adhesive Identification number (a) Component weight% (b) Component weight% (c) Component weight% (d) Component weight% (e) Component weight% Peel Strength kgf / 25 mm Destruction way 3A 59.9 20.0 20.0 0.0 0.10 N / A Adhesive to aluminum 3B 49.9 20.0 20.0 10.0 0.10 26.9 Adhesive to aluminum 3C 39.9 20.0 20.0 20.0 0.10 36.3 20% cohesive 3D 39.9 20.0 20.0 20.0 0.10 18.6 30% cohesive 3E 29.9 20.0 20.0 30.0 0.10 20.5 100% cohesive (a) component = metallocene ethylene butene copolymer having a density of 0.905 and MI of 4.5 dg / min (b) component = high density polyethylene (HDPE) (c) of 1.0 wt% maleic anhydride and 11 dg / min of MI (c ) Component = Ethylene / Propylene / Norbornadiene Copolymer (EPDM) Elastomer (d) with Mooney Viscosity (D) Component = Polybutadiene Impact Modified Polystyrene (HIPS) Elastomer (e) Component = Hindered Polyphenol Antioxidant issue

While the invention has been demonstrated and described with respect to preferred embodiments, it should be understood by those skilled in the art that other changes, modifications, additions and omissions may be made without departing from the spirit and scope of the invention as defined by the appended claims.

Claims (25)

(a) 0 to 90 parts by weight of polyolefin; (b) 5-95 parts by weight of functional polyolefin; (c) 5 to 40 parts by weight of polystyrene; (d) 1 to 30 parts by weight of elastomer A resin composition prepared by mixing a starting material, wherein the total amount of components (a), (b), (c) and (d) in the resin composition is 100 parts by weight). The resin according to claim 1, wherein the polystyrene is selected from the group consisting of homopolymers of styrene and copolymers of styrene and unsaturated monomers. The resin according to claim 1, wherein the polystyrenes are impact resistant polystyrenes. The resin of claim 1 wherein the polystyrenes are blends of two or more different polystyrenes. The resin according to claim 1, wherein the polystyrene is a copolymer of styrene and a monomer selected from the group consisting of ethylene, butene, butadiene or isoprene. The resin of claim 5 wherein the polystyrene is selected from the group consisting of ethylene / styrene random or block copolymers, ethylene / butadiene random or block copolymers and hydrogenated and partially hydrogenated butadiene / styrene copolymers. The resin composition according to claim 1, wherein the functional polyolefin is a graft polyolefin. The resin composition according to claim 3, wherein the functional polyolefin is a graft polyolefin. (a) 0 to 90 parts by weight of polyethylene; (b) 5-95 parts by weight of maleic anhydride graft polyethylene; (c) 5 to 40 parts by weight of impact resistant polystyrene; (d) 1 to 30 parts by weight of elastomer selected from the group consisting of ethylene-propylene elastomer, ethylene-propylene diene elastomer, polyisobutylene and polyisobutylene styrene-butadiene elastomer A resin composition prepared by mixing a starting material, wherein the total amount of components (a), (b), (c) and (d) in the resin composition is 100 parts by weight). The method of claim 9, (a) 40 to 60 parts by weight of polyethylene; (b) 10 to 30 parts by weight of maleic anhydride graft polyethylene; (c) 10 to 35 parts by weight of impact resistant polystyrene; (d) 10 to 25 parts by weight of the elastomer compound A resin composition prepared by mixing a starting material, wherein the total amount of components (a), (b), (c) and (d) in the resin composition is 100 parts by weight). The resin composition of claim 10, wherein the polyethylene comprises at least one high density polyethylene, linear low density polyethylene, and low density polyethylene. 8. The resin composition of claim 7, wherein the graft polyethylene is selected from the group consisting of maleic anhydride graft linear low density polyethylene, maleic anhydride low density polyethylene, maleic anhydride graft high density polyethylene. (a) 0 to 90 parts by weight of the non-olefin copolymer; (b) 5-95 parts by weight of functional polyolefin; (c) 5 to 40 parts by weight of impact resistant polystyrene; (d) 1 to 30 parts by weight of elastomer A resin composition prepared by mixing a starting material, wherein the total amount of components (a), (b), (c) and (d) in the resin composition is 100 parts by weight) and does not contain a tackifier. The resin composition according to claim 13, wherein the non-olefin copolymer is an ethylene vinyl acetate copolymer. The resin composition of claim 13, wherein the graft polyethylene is selected from the group consisting of maleic anhydride graft linear low density polyethylene, maleic anhydride graft low density polyethylene and maleic anhydride graft high density polyethylene. 16. The resin composition of claim 15, wherein the functional polyolefin is maleic anhydride graft polyethylene. The method of claim 13, (a) 40 to 60 parts by weight of ethylene vinyl acetate copolymer; (b) 10 to 30 parts by weight of maleic anhydride graft polyethylene; (c) 10 to 35 parts by weight of impact resistant polystyrene; (d) 10 to 20 parts by weight of the elastomer compound Wherein the total amount of components (a), (b), (c) and (d) in the resin composition is 100 parts by weight). 18. The resin composition of claim 17, wherein the ethylene vinyl acetate copolymer contains 3 to 40 weight percent of vinyl acetate. 19. The resin composition of claim 18, wherein the ethylene vinyl acetate copolymer contains 5 to 30 weight percent of vinyl acetate. An adhesive composition comprising the resin of claim 1. Adhesive composition comprising the resin according to claim 9. Adhesive composition comprising the resin according to claim 13. (a) a metal substrate; (b) a polymer layer; And (c) the adhesive composition layer of claim 20 between the metal substrate and the polymer layer Composite structure comprising a. (a) a metal substrate; (b) a polymer layer; And (c) the adhesive composition layer of claim 21 between the metal substrate and the polymer layer Composite structure comprising a. (a) a metal substrate; (b) a polymer layer; And (c) the adhesive composition layer of claim 22 between the metal substrate and the polymer layer. Composite structure comprising a.