JPH0741628A - Adhesive fluorine polymer and laminatings therefrom - Google Patents

Abstract

PURPOSE:To obtain the title polymer which comprises a specific graft copolymer and a tetrafluoroethylene-ethylene copolymer and is useful in laminated films because of its high adhesion, excellent chemical resistance, weather resistance and surface characteristics. CONSTITUTION:The objective polymer comprises (A) a graft polymer prepared by grafting (i) an acrylonitrile-styrene copolymer onto (ii) an ethylene-ethyl acrylate-maleic anhydride terpolymer and (B) a tetrafluoroethylene-ethylene copolymer where the amount of the component A is recommendably 0.2 to 5 pts.wt. per 100 pts.wt. of the component B.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fluorine-based adhesive polymer having good adhesion to other organic or inorganic materials during melt molding, heating, coating, etc., and a laminate using the same.

[0002]

2. Description of the Related Art Tetrafluoroethylene-ethylene copolymers are used in a wide range of fields because of their excellent chemical resistance, weather resistance, surface properties, etc., and are used in a wide range of fields such as inorganic materials such as metals and glass, natural or synthetic resins, etc. It is often used for adhesion with organic materials and surface treatment.

[0003]

However, in these methods, the two are physically adhered to each other, and therefore the adhesive force often varies or is insufficient depending on the target substance. There was a problem that the product was inferior in chemical resistance and water resistance. In addition, it was necessary to use a primer or perform surface treatment in order to make the adhesion stronger.

[0004]

The present invention has been made to solve the above-mentioned problems, and is formed by grafting an ethylene-ethyl acrylate-maleic anhydride copolymer with an acrylonitrile-styrene copolymer. The present invention provides a fluorine-based adhesive polymer composed of a graft copolymer and a tetrafluoroethylene-ethylene-based copolymer.

The tetrafluoroethylene-ethylene copolymer used in the present invention is one in which tetrafluoroethylene and ethylene are copolymerized at a ratio of 30/70 to 70/30 (molar ratio), and one more type. Alternatively, it is a copolymer of other copolymerizable olefins such as two or more kinds of fluorine-based olefins and hydrocarbon-based olefins.

Examples of the copolymerizable olefin include α-olefins such as propylene and butene, fluorine-containing olefins such as hexafluoropropylene, vinylidene fluoride, (perfluorobutyl) ethylene, and trifluorochloroethylene, ethyl vinyl ether, perfluoroethylene. Examples thereof include vinyl ethers such as fluoromethyl vinyl ether and perfluoropropyl vinyl ether, and fluorinated acrylates. When these olefins are copolymerized, it is preferable to copolymerize them in the copolymer within a range of 50 mol% or less.

The molecular weight of the tetrafluoroethylene-ethylene copolymer is not particularly limited, but it can be used in the range of low molecular weight liquids at room temperature to high molecular weight rubbers and thermoplastic resins. In the production of tetrafluoroethylene-ethylene copolymer, bulk polymerization, suspension polymerization,
All conventionally known various polymerization methods such as emulsion polymerization and solution polymerization can be adopted.

Here, a graft copolymer obtained by grafting an acrylonitrile-styrene copolymer onto an ethylene-ethyl acrylate-maleic anhydride copolymer for imparting adhesiveness is a tetrafluoroethylene-ethylene copolymer. It is important to blend in the range of 0.1 to 50 parts by weight with respect to 100 parts by weight.

The composition ratio of this graft copolymer is ethylene-ethyl acrylate-maleic anhydride copolymer 1
It is grafted in the range of 0.1 to 50 parts by weight with respect to 00 parts by weight. The ethylene-ethyl acrylate-maleic anhydride copolymer was used in a composition ratio of 1 to 30 parts by weight of ethyl acrylate and 1 to 20 parts by weight of maleic anhydride to 100 parts by weight of ethylene. It is a thing. The acrylonitrile-styrene copolymer is a copolymer of styrene in an amount of 1 to 50 parts by weight based on 100 parts by weight of styrene.

The above graft copolymer is used in an amount of 0.1 to 10 parts by weight, preferably 0.2 to 5 parts by weight, based on 100 parts by weight of the tetrafluoroethylene-ethylene copolymer. . When the blending is carried out in a molten state, it can be carried out continuously in an extruder or the like, which is efficient. For example, the desired polymer is obtained by heating with an extruder or the like and performing blending while mixing in a molten state within a range of a residence time of several seconds to several hours.

The fluorine-based adhesive polymer of the present invention is optional depending on the filler such as glass fiber, carbon fiber, metal oxide, carbon, face amount, ultraviolet absorber, and other uses, as long as its performance is not impaired. It is possible to mix the additives. Further, it may be used by blending it with other fluororesin or thermoplastic resin.

The fluoroadhesive polymer thus obtained is laminated or adhered to another organic or inorganic material by a conventionally known method such as extrusion, coextrusion, inflation, coating, or insert molding using a mold. Is possible. By those methods, for example, a two-layer laminated film of the polymer of the present invention and another polymer, a laminate of three or more layers in which the polymer of the present invention is used as an adhesive layer and another polymer is laminated on both surfaces, A metal coated with a polymer, an inorganic material such as glass and ceramics, a metal coated with another polymer using the polymer of the present invention as an adhesive layer, an inorganic material such as glass and ceramics, and the like can be obtained. Further, the fluorine-based adhesive polymer of the present invention can be used as a surface treatment of powder and as a paint.

[0013]

EXAMPLES The present invention will be specifically described with reference to examples. In the examples, “part” means “part by weight”.

Example 1 COP88AX (tetrafluoroethylene / ethylene /
(Perfluorobutyl) ethylene = 53/47 / 1.5
(Molar ratio), made by Asahi Glass Co., Ltd.) to 100 parts of pellets,
A product obtained by grafting an acrylonitrile-styrene copolymer to an ethylene-ethyl acrylate-maleic anhydride copolymer (ethylene: ethyl acrylate: maleic anhydride = 85: 12: 3 copolymer to acrylonitrile: styrene = 30). : 70 copolymer grafted at a ratio of 7: 3) 10 parts in advance, and
Using a twin-screw extruder, the mixture was melt-mixed at 300 ° C. for a residence time of 1 minute to obtain an adhesive polymer. This was molded into a 0.1 mm film at 330 ° C. Nylon powder 5016XHP (nylon 1
2, manufactured by Toray Co., Ltd.) was used to laminate a 0.1 mm nylon layer at 300 ° C., and the fluororesin COP88AX film was laminated at 300 ° C. on the other surface of the film to obtain a three-layer multilayer film. . The peel strength of this laminated film was 8.5 kg / cm on the nylon side and 9.0 kg / cm on the fluororesin side.

Example 2 The adhesive polymer obtained in Example 1 was laminated on glass at 330 ° C. to a thickness of 0.2 mm. The peel strength of this laminate was 5 kg / cm.

Comparative Example 1 A laminated film in which the nylon film of Example 1 and the COP88AX film were laminated was obtained. The peel strength of this film was 2 kg / cm.

Comparative Example 2 A laminate was obtained in the same manner as in Example 2 except that COP88AX was used as it was instead of the adhesive polymer. The peel strength of this laminate is 1.8 kg / cm.
was.

[0018]

The laminate obtained by the present invention has a strong adhesive force and excellent properties of a tetrafluoroethylene-ethylene copolymer, and can be coated with various laminated films, metals, ceramics, concrete, etc. Chemical resistance, solvent resistance, oil resistance, gas barrier properties, water repellency, oil repellency, weather resistance, corrosion resistance, waterproofness, stain resistance, etc. It can be used in the industrial field.

Claims (4)

[Claims] 1. A fluorine-based adhesive polymer comprising a graft copolymer obtained by grafting an acrylonitrile-styrene copolymer onto an ethylene-ethyl acrylate-maleic anhydride copolymer and a tetrafluoroethylene-ethylene copolymer. 2. A laminate comprising the fluoroadhesive polymer according to claim 1 and another polymer layer. 3. A laminate of the fluorine-based adhesive polymer according to claim 1 and an inorganic material. 4. A laminate of an inorganic material having the fluorine-based adhesive polymer of claim 1 as an adhesive layer and another polymer.