JPH0115379B2 - - Google Patents

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Publication number
JPH0115379B2
JPH0115379B2 JP9611379A JP9611379A JPH0115379B2 JP H0115379 B2 JPH0115379 B2 JP H0115379B2 JP 9611379 A JP9611379 A JP 9611379A JP 9611379 A JP9611379 A JP 9611379A JP H0115379 B2 JPH0115379 B2 JP H0115379B2
Authority
JP
Japan
Prior art keywords
weight
parts
component
resin
polypropylene
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
JP9611379A
Other languages
Japanese (ja)
Other versions
JPS5621850A (en
Inventor
Makoto Mizutani
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Idemitsu Kosan Co Ltd
Original Assignee
Idemitsu Kosan Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Idemitsu Kosan Co Ltd filed Critical Idemitsu Kosan Co Ltd
Priority to JP9611379A priority Critical patent/JPS5621850A/en
Publication of JPS5621850A publication Critical patent/JPS5621850A/en
Publication of JPH0115379B2 publication Critical patent/JPH0115379B2/ja
Granted legal-status Critical Current

Links

Landscapes

  • Laminated Bodies (AREA)
  • Compositions Of Macromolecular Compounds (AREA)

Description

【発明の詳細な説明】[Detailed description of the invention]

本発明は樹脂―金属積層物に関する。 ポリプロピレンをアルミニウムなどの金属と積
層しても、ポリプロピレンは無極性材料であるた
め接着力を有していない。従来、この接着力の向
上を図るためポリプロピレン、金属の表面に放
電処理、クロム酸処理、火炎処理、各種エツチン
グなどの表面処理を行なう方法、ポリオレフイ
ンに無水マレイン酸をグラフトした変性ポリオレ
フインを用いる方法(特公昭42−10757号公報、
同47−4822号公報など)、酸変性ポリオレフイ
ンに炭化水素合成エラストマーを配合した組成物
を用いる方法(特開昭52−80334号公報)などが
ある。 しかしながら、これらの方法では表面処理に時
間と経費がかかつたり、接着強度が十分でなかつ
たり、あるいはエラストマーを加えると耐熱性、
耐油性、耐溶剤性が低下するという欠点がある。 本発明は、このような欠点を解消し接着力の高
い樹脂―金属積層物の提供を目的とするものであ
る。すなわち本発明は、(A)不飽和カルボン酸ある
いはその無水物で変性された結晶性ポリプロピレ
ンもしくは該ポリプロピレンと未変性結晶性ポリ
プロピレンとの混合物99〜40重量部および(B)エチ
レン単独重合体またはエチレン―酢酸ビニル共重
合体1〜60重量部よりなる樹脂層と金属層からな
る樹脂―金属積層物を提供するものである。 本発明において(A)成分として用いる不飽和カル
ボン酸あるいはその無水物で変性された結晶性ポ
リプロピレンとは、プロピレン単独重合体、プロ
ピレンを主成分とするエチレン、ブテン―1、ヘ
キセン―1などとの共重合体あるいはこれらの混
合物に対しアクリル酸、マレイン酸、イタコン
酸、フマル酸、クロトン酸、シトラコン酸、ソル
ビン酸、メサコン酸、アンゲリカ酸等の不飽和カ
ルボン酸またはこれらの無水物を単独で、もしく
は適宜に組合せて付加せしめて一部あるいは全部
を変性したポリオレフインを意味し、その製法は
特に制限されず、溶融性、溶液法等の公知方法を
任意に適用できる。不飽和カルボン酸またはその
無水物は結晶性ポリプロピレンに対して0.001〜
15%、好ましくは0.005〜10%含有せしめる。ま
た、未変性結晶性ポリプロピレンとはこのような
変性処理を受けない上記重合体または共重合体を
意味する。 次に、本発明では(B)成分としてエチレン単独重
合体またはエチレン―酢酸ビニル共重合体を用い
る。エチレン単独重合体にあつては低密度、中密
度および高密度のいずれの重合体も使用できる。 上記(A)、(B)両成分の配合割合については、(A)成
分99〜40重量部に対して(B)成分1〜60重量部、好
ましくは(A)成分97〜60重量部に対して(B)成分3〜
40重量部とすべきである。(B)成分の量がこの範囲
外であると、得られる積層物の層間接着強度は満
足しうるものとならない。また、上記両成分は予
め溶融混練して組成物としておく。 一方、金属としてはアルミニウム、鉄、トタ
ン、ブリキ、銅などがあり、これらは未加工の板
状体であつてもよくアルミニウム箔のような加工
品であつてもよい。 本発明の樹脂―金属積層物は、積層に際して接
着剤などの使用を必要とせず、金属が板状体であ
り樹脂がフイルムもしくはシートの場合は両者を
二層もしくはそれ以上の多層に積層して熱圧着す
ればよい。また、金属が板状体あるいは他の加工
品の形状であるときは、樹脂層を粉体塗装や溶液
あるいはエマルジヨン塗装を適用して金属層に積
層することができる。 このようにして得られる本発明の樹脂―金属積
層物は両者間の接着力が高く、しかも耐溶剤性、
耐熱性にすぐれている。したがつて、各種食品の
包装資材、飲料缶、工業材料、建材等として有効
に利用することができる。 次に、本発明を実施例により詳しく説明する。 製造例 1 変性ポリプロピレンAの製造 ポリプロピレン(プロピレン・エチレンランダ
ムコポリマー、エチレン含有量3重量%、MI:
7g/10分、密度0.91g/cm3)100重量部、無水マレ
イン酸20重量部、末端ヒドロキシル化1,4―ポ
リブタジエン(数平均分子量3000)5重量部およ
びジクミルパーオキサイド2重量部をキシレン
600重量部に添加し、120℃で60分間撹拌、溶解し
たのち、140℃で90分間撹拌しながら反応させた。
次いで反応物を大量のアセトン中に入れ、反応生
成物を沈澱させ、乾燥することによつて白色粉状
の無水マレイン酸変性ポリプロピレンを得た。な
お、無水マレイン酸付加量は6.7重量%(酸価測
定法)であつた。 製造例 2 変性ポリプロピレンBの製造 ポリプロピレン(プロピレン―エチレンランダ
ムコポリマー、エチレン含有量3重量%、MI:
7g/10分、密度0.91g/cm3)100重量部、無水マレ
イン酸10重量部およびジクミルパーオキサイド2
重量部をキシレン600重量部に添加し120℃で60分
間撹拌、溶解し、140℃で90分間撹拌しながら反
応させた。次いで反応物を大量のアセトン中に入
れ、反応生成物を沈澱させ、乾燥することによつ
て白色粉状の無水マレイン酸変性ポリマロピレン
を得た。なお、無水マレイン酸付加量は0.6重量
%(酸価測定法)であつた。 実施例 1 製造例1で得られた変性ポリプロピレンA、未
変性ポリプロピレンおよび低密度ポリエチレンの
組成を表―1に示したように種々変え、押出機に
より190℃で溶融押出しペレツトを得た。このペ
レツトを190℃で圧縮成形し、厚さ約300μのシー
トを成形した。 このシートと厚さ80μのアルミニウム板を重ね
合せ、温度220℃、圧力1Kgで1秒間加熱圧着し
て樹脂―金属積層物を得た。この積層物のT剥離
強度を表―1に示す。
The present invention relates to resin-metal laminates. Even if polypropylene is laminated with a metal such as aluminum, it does not have adhesive strength because polypropylene is a nonpolar material. Conventionally, in order to improve this adhesive strength, there have been methods to perform surface treatments such as electrical discharge treatment, chromic acid treatment, flame treatment, and various types of etching on the surface of polypropylene and metal, and methods to use modified polyolefin in which maleic anhydride is grafted onto polyolefin ( Special Publication No. 42-10757,
47-4822, etc.), and a method using a composition in which a hydrocarbon synthetic elastomer is blended with an acid-modified polyolefin (Japanese Patent Application Laid-open No. 52-80334). However, these methods require time and expense for surface treatment, insufficient adhesive strength, or the addition of elastomers may result in poor heat resistance,
It has the disadvantage of reduced oil resistance and solvent resistance. The present invention aims to eliminate such drawbacks and provide a resin-metal laminate with high adhesive strength. That is, the present invention provides (A) 99 to 40 parts by weight of a crystalline polypropylene modified with an unsaturated carboxylic acid or its anhydride or a mixture of said polypropylene and unmodified crystalline polypropylene, and (B) an ethylene homopolymer or ethylene. - A resin-metal laminate comprising a resin layer comprising 1 to 60 parts by weight of a vinyl acetate copolymer and a metal layer. In the present invention, the crystalline polypropylene modified with an unsaturated carboxylic acid or its anhydride used as component (A) refers to a propylene homopolymer, a polymer containing ethylene, butene-1, hexene-1, etc. mainly composed of propylene. For copolymers or mixtures thereof, unsaturated carboxylic acids such as acrylic acid, maleic acid, itaconic acid, fumaric acid, crotonic acid, citraconic acid, sorbic acid, mesaconic acid, angelic acid or their anhydrides alone, Alternatively, it refers to a polyolefin that is partially or completely modified by adding an appropriate combination, and the manufacturing method thereof is not particularly limited, and any known method such as a melting method or a solution method can be applied. Unsaturated carboxylic acid or its anhydride is 0.001~ for crystalline polypropylene
The content is 15%, preferably 0.005 to 10%. Moreover, unmodified crystalline polypropylene means the above-mentioned polymer or copolymer that is not subjected to such modification treatment. Next, in the present invention, an ethylene homopolymer or an ethylene-vinyl acetate copolymer is used as the component (B). As for the ethylene homopolymer, any of low density, medium density and high density polymers can be used. Regarding the blending ratio of both components (A) and (B) above, 1 to 60 parts by weight of component (B) to 99 to 40 parts by weight of component (A), preferably 97 to 60 parts by weight of component (A). On the other hand, (B) component 3~
Should be 40 parts by weight. If the amount of component (B) is outside this range, the interlayer adhesive strength of the resulting laminate will not be satisfactory. Further, both of the above components are melted and kneaded in advance to form a composition. On the other hand, metals include aluminum, iron, galvanized iron, tinplate, copper, etc., and these may be in the form of unprocessed plates or processed products such as aluminum foil. The resin-metal laminate of the present invention does not require the use of an adhesive or the like during lamination, and when the metal is a plate-like body and the resin is a film or sheet, the two or more layers can be laminated into two or more layers. Just heat and press it. Further, when the metal is in the form of a plate or other processed product, the resin layer can be laminated onto the metal layer by applying powder coating, solution coating, or emulsion coating. The resin-metal laminate of the present invention obtained in this manner has high adhesive strength between the two, and also has solvent resistance and
Excellent heat resistance. Therefore, it can be effectively used as packaging materials for various foods, beverage cans, industrial materials, building materials, etc. Next, the present invention will be explained in detail with reference to examples. Production example 1 Production of modified polypropylene A Polypropylene (propylene/ethylene random copolymer, ethylene content 3% by weight, MI:
7 g/10 min, density 0.91 g/cm 3 ), 100 parts by weight of maleic anhydride, 5 parts by weight of terminal hydroxylated 1,4-polybutadiene (number average molecular weight 3000), and 2 parts by weight of dicumyl peroxide in xylene.
The mixture was added to 600 parts by weight, stirred and dissolved at 120°C for 60 minutes, and reacted at 140°C for 90 minutes with stirring.
Next, the reaction product was poured into a large amount of acetone, and the reaction product was precipitated and dried to obtain maleic anhydride-modified polypropylene in the form of a white powder. The amount of maleic anhydride added was 6.7% by weight (acid value measurement method). Production Example 2 Production of modified polypropylene B Polypropylene (propylene-ethylene random copolymer, ethylene content 3% by weight, MI:
7g/10min, density 0.91g/ cm3 ) 100 parts by weight, maleic anhydride 10 parts by weight and dicumyl peroxide 2
Parts by weight were added to 600 parts by weight of xylene, stirred and dissolved at 120°C for 60 minutes, and reacted at 140°C for 90 minutes with stirring. Next, the reaction product was poured into a large amount of acetone, and the reaction product was precipitated and dried to obtain a white powdery maleic anhydride-modified polymaropyrene. The amount of maleic anhydride added was 0.6% by weight (acid value measurement method). Example 1 The compositions of modified polypropylene A, unmodified polypropylene and low density polyethylene obtained in Production Example 1 were varied as shown in Table 1, and pellets were obtained by melt extrusion at 190°C using an extruder. This pellet was compression molded at 190°C to form a sheet approximately 300μ thick. This sheet and an 80 μm thick aluminum plate were laminated and heat-pressed at a temperature of 220° C. and a pressure of 1 kg for 1 second to obtain a resin-metal laminate. Table 1 shows the T peel strength of this laminate.

【表】 実施例2〜5および比較例1 各成分の種類と配合割合(重量部)を変更した
こと以外は実施例1に準じて行なつた。条件およ
び結果を表―2に示す。
[Table] Examples 2 to 5 and Comparative Example 1 The procedure of Example 1 was followed except that the types and blending ratios (parts by weight) of each component were changed. The conditions and results are shown in Table 2.

【表】 なお、接着力の向上のためにはエチレン・プロ
ピレンゴムなどのゴム物質の添加が有効である
が、当該ゴム物質の添加により耐溶剤性などの他
の物性が低下するので、限定された用途に使用す
る場合を除いて、一般的には好ましくない。 比較例 2〜6 表―3に示す組成の樹脂を用いたこと以外は、
実施例1に準じて行ない樹脂―金属積層物を得
た。この積層物のT剥離強度および耐溶剤性試験
(ガソリンに24時間浸漬後の剥離強度とそのとき
の状態)の結果を、実施例4の結果と共に表―3
に示す。
[Table] Although it is effective to add rubber substances such as ethylene/propylene rubber to improve adhesive strength, it is limited because the addition of such rubber substances reduces other physical properties such as solvent resistance. Generally undesirable, except when used for specific purposes. Comparative Examples 2 to 6 Except for using resins with the compositions shown in Table 3,
A resin-metal laminate was obtained in accordance with Example 1. The results of the T-peel strength and solvent resistance test (peel strength after immersion in gasoline for 24 hours and the state at that time) of this laminate are shown in Table 3 along with the results of Example 4.
Shown below.

【表】【table】

Claims (1)

【特許請求の範囲】 1 (A)不飽和カルボン酸あるいはその無水物で変
性された結晶性ポリプロピレンもしくは該ポリプ
ロピレンと未変性結晶性ポリプロピレンとの混合
物99〜40重量部および(B)エチレン単独重合体また
はエチレン―酢酸ビニル共重合体1〜60重量部よ
りなる樹脂層と金属層からなる樹脂―金属積層
物。 2 樹脂層の(A)成分と(B)成分の配合割合が(A)成分
97〜60重量部に対して(B)成分3〜40重量部である
特許請求の範囲第1項記載の樹脂―金属積層物。
[Scope of Claims] 1 (A) 99 to 40 parts by weight of crystalline polypropylene modified with an unsaturated carboxylic acid or its anhydride or a mixture of said polypropylene and unmodified crystalline polypropylene, and (B) ethylene homopolymer Or a resin-metal laminate comprising a resin layer comprising 1 to 60 parts by weight of an ethylene-vinyl acetate copolymer and a metal layer. 2 The blending ratio of component (A) and component (B) in the resin layer is (A) component.
The resin-metal laminate according to claim 1, wherein the amount of component (B) is 3 to 40 parts by weight based on 97 to 60 parts by weight.
JP9611379A 1979-07-30 1979-07-30 Resinnmetal laminate Granted JPS5621850A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9611379A JPS5621850A (en) 1979-07-30 1979-07-30 Resinnmetal laminate

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9611379A JPS5621850A (en) 1979-07-30 1979-07-30 Resinnmetal laminate

Publications (2)

Publication Number Publication Date
JPS5621850A JPS5621850A (en) 1981-02-28
JPH0115379B2 true JPH0115379B2 (en) 1989-03-16

Family

ID=14156327

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9611379A Granted JPS5621850A (en) 1979-07-30 1979-07-30 Resinnmetal laminate

Country Status (1)

Country Link
JP (1) JPS5621850A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58136440A (en) * 1982-02-08 1983-08-13 三井東圧化学株式会社 Metallic laminate

Also Published As

Publication number Publication date
JPS5621850A (en) 1981-02-28

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