JPS62113546A - Metal reinforced panel and manufacture thereof - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

Detailed Description of the Invention (Field of Industrial Application) The present invention relates to a metal reinforced gunnel and a reinforcing material in which a metal plate (hereinafter often referred to as a "panel board") and a reinforcing material are adhesively bonded using an acrylic adhesive. It relates to its manufacturing method.

(Prior art and its problems) It is preferable to use thick metal plates for metal tunnels used in various structures to prevent deflection due to own weight and deformation due to external stress.

However, using thicker metal plates has drawbacks such as the cost of the metal plates and a decrease in work efficiency due to the increased weight of the metal plates, so in order to compensate for these disadvantages,
A thin metal plate with reinforcing materials of various shapes attached is used.

Conventionally, in the metal reinforcing/mother panel mentioned above, a single piece of mechanical joining such as electric welding (spot welding) or rivets has been generally used to join the panel plate and the reinforcing material. However, the reinforced panels obtained by joining the panel board and the reinforcing material using these conventional methods have the following drawbacks.

■Durability such as fatigue resistance and vibration resistance is insufficient because stress is concentrated at the joint.

■ Traces of bonding remain, making it difficult to apply to applications that require good design and surface precision.

■ -Producing the mother flannel requires special equipment or special skills, and the work efficiency is low.

■ Mechanical joints such as rivets have poor airtightness at the joint, and to compensate for this, troublesome work such as applying a sealant to the joint is required.

On the other hand, various types of metal reinforcement and
Flat flannel has also been devised and implemented, but the reliability of the bonding strength of the adhesive used and the workability of bonding are often insufficient, and it has the disadvantage of limiting its range of use. 1 child.

For example, in reinforcing panels in which the mother panel board and reinforcing material are bonded using epoxy adhesive, the peel strength and impact strength of the adhesive are not sufficient, and it is relatively easy to bond by external force. Because there is a risk of peeling off, it has been difficult to apply it to large-area panels or areas subject to large external stress. In addition, when using epoxy adhesives to make reinforced panels, it is necessary to accurately measure and thoroughly mix the main ingredient and curing agent. This may cause defects. Furthermore, epoxy adhesives generally have shortcomings in terms of workability, such as slow curing speeds, requiring a long time to obtain the desired strength, or requiring heating.

Also, JP-A-53-78240 and JP-A-56-
Publication No. 46087 discloses a reinforced panel in which a room temperature curing acrylic adhesive is used to bond a panel board and a reinforcing material. The above acrylic adhesive is a two-component adhesive, but it does not require accurate measuring and thorough mixing of the two components, and it is relatively easy to measure and mix the two components (sometimes just contacting the two components) at room temperature. Because it hardens in a short time and has high peel strength and impact strength, reinforced panels that use the acrylic adhesive to bond the Noel board and reinforcing material have excellent workability during manufacturing, and the strength of the panel itself. It also has the feature of excellent durability. However, the acrylic adhesive has the disadvantage that its peel strength and impact strength decrease at extremely low temperatures. When used for exterior panels of automobiles, there is a risk that the joints may peel off due to external force, and therefore, its range of use has been limited to areas with relatively mild usage conditions, such as indoors.

The present invention has been made in view of these points, and includes:
By using an acrylic adhesive containing a specific component (described later) to join the mother flannel board and the reinforcing material, there is less stress concentration on the joint, and it has excellent durability even at low temperatures, and leaves no traces of joining. An object of the present invention is to provide a metal reinforced panel which has excellent design, has high airtightness, and has excellent workability when joining a panel board and a reinforcing material, and a method for manufacturing the same.

A metal-reinforced 9-nel panel in which a metal plate and a reinforcing material are bonded via a cured acrylic adhesive whose main component is an acrylonitrile-butanoene copolymer elastomer containing 75% by weight or more, and (2) ) The metal plate and the reinforcing material are combined with an acrylate monomer and/or a methacrylate monomer, and the main component is an acrylonitrile-butanoene copolymer elastomer with a putazidine content of 75 m [%] or more, an organic peroxide and an organic The present invention relates to a method for manufacturing a metal-reinforced 9-wall panel characterized by adhesive bonding using an acrylic adhesive that hardens in the presence of a component that promotes the decomposition of peroxide and facilitates the generation of radicals.

The acrylic adhesive used for joining the metal reinforced panels of the present invention is an acrylonitrile-butanoene copolymer elastomer containing an acrylate monomer and/or a methacrylate monomer and a butadiene content of 75 M% or more (
It is a solution that produces (hereinafter often referred to as NRR),
These harden through polymerization and provide strong adhesive strength. The compositional feature of this acrylic adhesive is that NBR with a bound butadiene content of 75% by weight or more is used in the elastomer contained as the main component of the adhesive for the purpose of improving peel strength and impact strength. If the amount of bound getatsuene in NBR is less than 75 M%, the adhesive strength (peel strength, impact strength) at low temperatures will decrease significantly, and therefore the durability of the reinforced panel at low temperatures will decrease, making it impossible to achieve the object of the present invention. do not have.

A preferred composition of the acrylic adhesive is acrylate monomer and/or methacrylate monomer 60
-9sz-z% and NBR5-40% by weight with a bound butanoene content of 75uit% or more, these are the main components,
This contains an organic peroxide and a component (hardening accelerator) that promotes the decomposition of the organic peroxide and facilitates the generation of lanocal. The amount of organic peroxide and curing accelerator used is sufficient to polymerize and cure the monomer components in the adhesive, but usually 1 to 10 parts of organic peroxide is used per 100 parts by weight of monomer components.
parts by weight, and 0.1 to 10 parts by weight of the curing accelerator.

Examples of acrylate monomers and methacrylate thread monomers include methyl acrylate, ethyl acrylate, propyl acrylate, butyl acrylate, methyl methacrylate, ethyl methacrylate, butyl methacrylate, 2-ethylhexyl methacrylate, and methacrylate. Lauryl acrylate, 2-hydroxyethyl methacrylate, methacrylic rlR3-hydroxyglobyl, 2-hydroxyglovir methacrylate, 3-hydroxymethacrylate
Examples include chloro-2-hydroxyglobil, cyclohexyl methacrylate, and glycityl methacrylate.

The organic peroxide in the present invention has the function of a so-called lanocal polymerization initiator, and includes, for example, penzoylno-e-oxide, methyl ethyl ketone hydronog-oxide, t-
-butylhydrochloride, monooxide, di-t-butylhydroxide, dicumylhydroxide,
Examples include cumene hydrochloride oxide and nonramenthane hydrochloride oxide.

Further, as the curing accelerator in the present invention, for example, metal soaps such as cobalt naphthenate, trimethyl-P-toluidino, noethyl-P-toluinone, noisoglopanol-
P-) luino/or thiourea, acetylthiourea,
Examples include thioamide compounds such as tetramethylthiourea, ethylenethiourea, and mercaptobenzimidazole.

In the acrylic adhesive used in the present invention, in addition to the acrylate monomer and/or methacrylate monomer, other monomers can be added to the adhesive if necessary, but the amount is limited to 10% by weight or less in the adhesive. It is preferable.

Furthermore, it is also possible to use various polymers other than the main component NBR and various additives normally used in adhesives. m% or less is preferable.

The acrylic adhesive used in the present invention consists of two liquids, A and B, both of which contain an acrylate monomer and/or a methacrylate monomer, and one of which contains an organic filtrate. A so-called two-component solution containing an oxide, a curing accelerator in the other liquid, sweetening NBR in at least one of the A and B liquids, and other components in the A and/or B liquids as desired. A Zolaimer consisting of a base adhesive and a solution of either an organic peroxide or a curing accelerator dissolved in itself or in an organic bath medium or monomer such as acetone, methanol, or ethanol;
There are brimer type adhesives which are made of a base agent containing either an organic peroxide or a curing accelerator, an acrylate monomer and/or a methacrylate thread monomer, NBR, and other components as necessary. These adhesives cure at room temperature upon contact between two layers.

Materials for the panel plates and reinforcing materials used in the present invention include, but are not limited to, aluminum and its alloys,
There are various types of plated steel (typical examples include painted surface-treated steel and stainless steel. Also,
- The channel plate and the reinforcing material may be made of the same material or may be made of different materials.

Typical shapes of the reinforcing material are shown in Figure 17. : Examples include, but are not limited to, A, B, C, and D.

In the present invention, an acrylate monomer and/or a modified acrylic adhesive is used to bond the metal panel board and the reinforcing material.

The method for adhering the panel board and the reinforcing material may be any of the methods listed below, taking into account the type of acrylic adhesive mentioned above, the area of the adhering surface, etc.

b) In the case of a two-component adhesive consisting of base agent A and base agent B (
Part 1) Apply main agent A of acrylic adhesive to either the flat panel or the layered surface of the reinforcing material, and the other side) Main agent A and King #I B
In the case of a double agent type adhesive consisting of (Part 2) A mixture of base agent A and base agent B is applied to either the flat plate, 9 panels, or the layered surface of the reinforcing material, and the adhesive is reusable. Overlap the other coating surface within the time (pot life), a)
Similarly, let it stand for a predetermined period of time.

c) In the case of primer-type adhesives, apply the base agent to one of the coated surfaces of the flat plate/thin panel or reinforcing material, and apply a primer containing an accelerator or organic peroxide to the other coated surface, and then If it contains a solvent, after the solvent is evaporated and dried, the adhered surfaces are placed on top of each other and allowed to stand for a predetermined period of time in the same manner as in (a) and ()).

(Example) The present invention will be described below with reference to Examples, and all parts in the specification represent M-slide parts.

[Example 1 and Comparative Example 1] Acrylic adhesives listed in Table 1 were blended, and the performance of this adhesive was measured and shown in Table 2.

Using these adhesives, aluminum alloy reinforced panels having the shapes shown in FIGS. 2, 3, and 4 were produced.

- The materials of the flannel plate a and the reinforcing materials b, b', and b'' are specified by JIS H-4000K and are designated by the symbol A-
5052 and A-6061, both of which had been sandblasted in advance, were used. The adhesion method is: - Apply main agent A to the surface to which the Senel board is applied, and apply main agent B to the surface to which the reinforcing agent is applied, and overlap the two corrugated surfaces.

The pressurizing method is to apply a load of 0.2 A-/ per square senna for 20 minutes. The working temperature was 25°C.

The reinforcing channel fabricated in this way was placed on a concrete floor with the side with the reinforcing material attached facing down, and a 1 ky steel ball was dropped from a height of 1 m above the panel surface onto the center of the main channel. Measure the number of times the steel ball falls until the reinforcing material separates from the flat plate/gunnel. The results are shown in Table 3.

[Comparative Example-2] A two-component engineered poxy adhesive (Cemedine-1) was used as the adhesive.
(1500, manufactured by Cemedine Co., Ltd.), the weight ratio of the main agent and curing agent was measured to be 1:l, mixed with light, applied to the layered surface of the reinforcing plate, laminated with a flat plate/9 panel, and heated at 80℃. A reinforcing and motherboard panel was prepared in the same manner as in Example 1, except that the interlayer agent was allowed to harden for 50 minutes, and a falling ball impact test was conducted in the same manner as in Example 1. The results are shown in Table 3.

Adhesive performance was measured by the following test method.

(1) Measurement of adhesion time An iron material was used as a test piece. Adhesive was applied to a 1-inch square surface at room temperature, mixed and bonded, and a tensile load of 50% was applied to measure the time until the test piece stopped rubbing.

(2) Measurement of adhesive strength -' Peel (T-peel) strength is ASTM-D-1876-61T, impact strength is ASTM-D-950-
54, respectively.

The test piece used was a sandblasted surface-treated iron material.

[Brief explanation of drawings]

A, B, C, and D in FIG. 1 are schematic diagrams showing examples of the shapes of reinforcing materials, and the partial flannel plates, b, b', and
b" are reinforcing members each having the same shape. FIG. 3 is a side view of the above panel, and FIG. 4 is an enlarged view of the portion C surrounded by the dotted line in FIGS. 2 and 3. d is an adhesive layer.

Claims (1)

[Claims] 1. A cured product of an acrylic adhesive mainly composed of an acrylonitrile-butadiene copolymer elastomer with a butadiene content of 75% by weight or more bound to an acrylate monomer and/or a methacrylate monomer. A metal reinforced panel made by joining a board and reinforcing material. 2. The metal plate and the reinforcing material are made of acrylonitrile-butadiene copolymer elastomer with a butadiene content of 75% by weight or more combined with an acrylate monomer and/or a methacrylate monomer, and an organic peroxide and an organic peroxide. A method for manufacturing a metal reinforced panel characterized by bonding with an acrylic adhesive that hardens in the coexistence of a component that promotes the decomposition of oxides and facilitates the generation of radicals.