WO2008030049A1 - High-strength adhesive composition - Google Patents

High-strength adhesive composition Download PDF

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Publication number
WO2008030049A1
WO2008030049A1 PCT/KR2007/004308 KR2007004308W WO2008030049A1 WO 2008030049 A1 WO2008030049 A1 WO 2008030049A1 KR 2007004308 W KR2007004308 W KR 2007004308W WO 2008030049 A1 WO2008030049 A1 WO 2008030049A1
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WIPO (PCT)
Prior art keywords
epoxy resin
modified epoxy
strength
adhesive composition
amount
Prior art date
Application number
PCT/KR2007/004308
Other languages
French (fr)
Inventor
Hu-Ryeoung Ju
Sun-Yu Kim
Original Assignee
Henkel Korea Ltd.
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Filing date
Publication date
Application filed by Henkel Korea Ltd. filed Critical Henkel Korea Ltd.
Publication of WO2008030049A1 publication Critical patent/WO2008030049A1/en

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    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J163/00—Adhesives based on epoxy resins; Adhesives based on derivatives of epoxy resins
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J163/00—Adhesives based on epoxy resins; Adhesives based on derivatives of epoxy resins
    • C09J163/10—Epoxy resins modified by unsaturated compounds
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L33/00—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides or nitriles thereof; Compositions of derivatives of such polymers
    • C08L33/18—Homopolymers or copolymers of nitriles
    • C08L33/20—Homopolymers or copolymers of acrylonitrile
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L9/00—Compositions of homopolymers or copolymers of conjugated diene hydrocarbons
    • C08L9/02—Copolymers with acrylonitrile
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J11/00—Features of adhesives not provided for in group C09J9/00, e.g. additives
    • C09J11/02—Non-macromolecular additives
    • C09J11/04—Non-macromolecular additives inorganic
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J11/00—Features of adhesives not provided for in group C09J9/00, e.g. additives
    • C09J11/02—Non-macromolecular additives
    • C09J11/06—Non-macromolecular additives organic
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J9/00—Adhesives characterised by their physical nature or the effects produced, e.g. glue sticks
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/02—Elements
    • C08K3/04—Carbon
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
    • C08K3/20—Oxides; Hydroxides
    • C08K3/22—Oxides; Hydroxides of metals
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
    • C08K3/24—Acids; Salts thereof
    • C08K3/26—Carbonates; Bicarbonates
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K5/00—Use of organic ingredients
    • C08K5/16—Nitrogen-containing compounds
    • C08K5/315—Compounds containing carbon-to-nitrogen triple bonds
    • C08K5/3155—Dicyandiamide
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K9/00—Use of pretreated ingredients
    • C08K9/04—Ingredients treated with organic substances
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2666/00—Composition of polymers characterized by a further compound in the blend, being organic macromolecular compounds, natural resins, waxes or and bituminous materials, non-macromolecular organic substances, inorganic substances or characterized by their function in the composition
    • C08L2666/02—Organic macromolecular compounds, natural resins, waxes or and bituminous materials
    • C08L2666/14—Macromolecular compounds according to C08L59/00 - C08L87/00; Derivatives thereof
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L27/00—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Compositions of derivatives of such polymers
    • C08L27/02—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Compositions of derivatives of such polymers not modified by chemical after-treatment
    • C08L27/04—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Compositions of derivatives of such polymers not modified by chemical after-treatment containing chlorine atoms
    • C08L27/06—Homopolymers or copolymers of vinyl chloride
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L63/00—Compositions of epoxy resins; Compositions of derivatives of epoxy resins

Definitions

  • the present invention relates to a high-strength adhesive composition in the form of a tape, more particularly to a high-strength adhesive composition in the form of a tape comprising a resin, a latent curing agent, fumed silica, a moisture absorbent, a coloring agent, a processing aid and a filler, wherein the resin comprises a trimethylolpropane-modified epoxy resin, a nitrile butadiene rubber (NBR)- modified epoxy resin, a bisphenol F type epoxy resin, a carboxy terminated butadiene acrylonitrile copolymer (CTBN)-modified epoxy resin and a dimer- modified epoxy resin.
  • NBR nitrile butadiene rubber
  • CTBN carboxy terminated butadiene acrylonitrile copolymer
  • the high-strength adhesive composition When applied in between vehicle panels, the high-strength adhesive composition offers sufficient strength to replace welding as it is cured while the vehicle passes through an auto-painting oven, with superior strength and durability. Further, it is applicable to various gaps and positions and provides adhesion and filling of panels.
  • compositions in the form of a paste are difficult to apply where there are wide gaps between panels or vertical positions.
  • the composition may flow along the surface, which causes it to be washed away by high-pressure liquid or dissolved by the electrodeposition solution during the pretreatment electrodeposition process.
  • the paste composition may result in the deformation of shape as the panels are pressed during the assembly process.
  • the present inventors developed a tape composition capable of replacing the paste composition thereby completing the present invention.
  • an object of the present invention is to provide a high-strength adhesive composition in the form of a tape, which is applicable to vehicle panels without using a special apparatus, easily applicable to various vehicle structures and easily applicable to the positions where the application of an adhesive is difficult and provides filling and sealing in between panels.
  • the present invention relates to a high-strength adhesive composition
  • a resin comprising a resin, a latent curing agent, fatty acid-coated fumed silica, a moisture absorbent, a coloring agent, a processing aid and a filler
  • the resin comprises 5-10 wt% of a trimethylolpropane-modified epoxy resin, 15-25 wt% of a nitrile butadiene rubber (NBR)-modified epoxy resin, 10-20 wt% of a bisphenol F type epoxy resin, 3-8 wt% of a carboxy terminated butadiene acrylonitrile copolymer (CTBN)-modified epoxy resin and 3-8 wt% of a dimer- modified epoxy resin, wherein the latent curing agent is contained in the amount of 6-10 wt%, the fatty acid-coated fumed silica is contained in the amount of 6-10 wt%, the moisture absorbent is contained in the amount of 3-5 wt%, the
  • the present invention relates to a high-strength adhesive composition
  • a resin comprising a resin, a latent curing agent, fumed silica, a moisture absorbent, a coloring agent, a processing aid and a filler
  • the resin comprises a trimethylolpropane-modified epoxy resin, a nitrile butadiene rubber (NBR)- modified epoxy resin, a bisphenol F type epoxy resin, a carboxy terminated butadiene acrylonitrile copolymer (CTBN)-modified epoxy resin and a dimer- modified epoxy resin.
  • NBR nitrile butadiene rubber
  • CTBN carboxy terminated butadiene acrylonitrile copolymer
  • the high-strength adhesive composition When applied between vehicle panels, the high-strength adhesive composition offers a superior strength enough to replace welding as it is cured while the vehicle passes through an auto-painting oven, with superior strength and durability. Further, it is applicable to various gaps and positions and provides adhesion and filling of panels.
  • the trimethylolpropane-modified epoxy resin used in the present invention is a material that offers good adhesion to various vehicle panels and is used in the amount of 5-10 wt%. If it is used less than 5 wt%, adhesion to panels may become weak. In contrast, if it is used more than 10 wt%, hardness increases and flowability becomes poor.
  • NBR nitrile butadiene rubber
  • the bisphenol F type epoxy resin used in the present invention provides strength comparable to that of a metal after curing and further improves curing. It is used in the amount of 10-20 wt%. If it is used less than 10 wt%, strength decreases. In contrast, if it is used more than 20 wt%, processability becomes poor because of increased penetration index and failure or cracking may occur in the cured composition by external impact.
  • the carboxy terminated butadiene acrylonitrile copolymer (CTBN)-modified epoxy resin used in the present invention has improved adhesion and attachment property with a rust preventive oil-coated plate. It is generally used in the amount of 3-8 wt %. If it is used less than 3 wt%, adhesion to a rust preventive oil-coated surface decreases. In contrast, if it is used more than 8 wt%, adhesion strength decreases thus increasing cost.
  • CBN carboxy terminated butadiene acrylonitrile copolymer
  • the dimer-modified epoxy resin used in the present invention improves adhesion strength to panels and is used in 3-8 wt%. If it is used less than 3 wt%, adhesion strength decreases. In contrast, if it is used more than 8 wt%, a panel deformation may occur.
  • the latent curing agent used in the present invention improves strength by providing a different currying system and is used in 6-10 wt%. If it is used less than 6 wt%, strength decreases. In contrast, if it is used more thanlO wt%, storage stability becomes poor.
  • As a latent curing agent it is preferred to use dicyandiamide.
  • the fumed silica used in the present invention provides outstanding oil absorption and fluidity since the breakup of fine foams does not occur during the mixing of the composition and is used in 6-10 wt%. If it is used less than 6 wt%, flowing may occur. In contrast, if it is used more thanlO wt%, productivity becomes poor because of low specific gravity.
  • the moisture absorbent used in the present invention removes moisture from the product and is used in the amount of 3-5 wt%. If it is used less than 3 wt%, moisture removal is insufficient and pot stability is inadequate. In contrast, if it is used more than 5 wt%, hardness of the product will increase. As a moisture absorbent, it is preferred to use calcium oxide.
  • the coloring agent used in the present invention provides color to the product and is used in the amount of 3-8 wt%. If it is used less than 3 wt%, a wanted color may not be attained. In contrast, if it is used more than 8 wt%, dispersibility will become poor due to increased oil absorption. As a coloring agent, it is preferred to use carbon black.
  • the processing aid used in the present invention improves processability and enhances adhesion. It is generally used in the amount of 3-8 wt%. If it is used less than 3 wt%, improvement of processability will become negligible. In contrast, if it is used more than 8 wt%, strength will decrease. As a processing aid, it is preferred to use a polyvinyl chloride resin.
  • the filler used in the present invention controls the volume of the final product and is used in 10-20 wt%. If it is used less than 10 wt%, it will be difficult to control volume. In contrast, if it is used more than 20 wt%, specific gravity will increase while strength will decrease. As a filler, it is preferred to use calcium carbonate.
  • a curing promoter or other constituents may be further used in the present invention.
  • the high-strength adhesive composition of the present invention may be prepared by using a conventional method in the art without any limitation.
  • the high-strength adhesive composition in the form of a tape of the present invention offers a strength enough to be able to reduce or replace welding as it is cured while the vehicle passes through an auto-painting oven, with superior strength and durability. Further, it is applicable to various gaps and positions without a special apparatus. It prevents the deformation of shape caused by the pressing of the panels during the assembly process. In addition, it provides superior processability and good filling and sealing. Since applicable to various positions, including flat, curved and vertical sites, it improves durability and collision performance of vehicles, while supporting various designs.

Abstract

The present invention relates to a high-strength adhesive composition in the form of a tape, more particularly to a high-strength adhesive composition in the form of a tape comprising a resin, a latent curing agent, fumed silica, a moisture absorbent, a coloring agent, a processing aid and a filler, wherein the resin comprises a trimethylolpropane-modified epoxy resin, a nitrile butadiene rubber (NBR)- modified epoxy resin, a bisphenol F type epoxy resin, a carboxy terminated butadiene acrylonitrile copolymer (CTBN)-modified epoxy resin and a dimer- modified epoxy resin. Especially, when applied between vehicle panels, the high- strength adhesive composition offers a strength enough to be able to replace welding as it is cured while the vehicle passes through an auto-painting oven, with superior strength and durability. Further, it is applicable to various gaps and positions and provides adhesion and filling of panels.

Description

[DESCRIPTION] [Invention Title]
HIGH-STRENGTH ADHESIVE COMPOSITION
[Technical Field]
The present invention relates to a high-strength adhesive composition in the form of a tape, more particularly to a high-strength adhesive composition in the form of a tape comprising a resin, a latent curing agent, fumed silica, a moisture absorbent, a coloring agent, a processing aid and a filler, wherein the resin comprises a trimethylolpropane-modified epoxy resin, a nitrile butadiene rubber (NBR)- modified epoxy resin, a bisphenol F type epoxy resin, a carboxy terminated butadiene acrylonitrile copolymer (CTBN)-modified epoxy resin and a dimer- modified epoxy resin. When applied in between vehicle panels, the high-strength adhesive composition offers sufficient strength to replace welding as it is cured while the vehicle passes through an auto-painting oven, with superior strength and durability. Further, it is applicable to various gaps and positions and provides adhesion and filling of panels.
[Background Art] Conventional high-strength compositions comprising an epoxy resin as main component are in the form of a paste.
[Disclosure] [Technical Problem] The conventional compositions in the form of a paste are difficult to apply where there are wide gaps between panels or vertical positions. In addition, depending on the application site, the composition may flow along the surface, which causes it to be washed away by high-pressure liquid or dissolved by the electrodeposition solution during the pretreatment electrodeposition process. Further, the paste composition may result in the deformation of shape as the panels are pressed during the assembly process.
[Technical Solution]
To solve the aforementioned problems, the present inventors developed a tape composition capable of replacing the paste composition thereby completing the present invention.
Accordingly, an object of the present invention is to provide a high-strength adhesive composition in the form of a tape, which is applicable to vehicle panels without using a special apparatus, easily applicable to various vehicle structures and easily applicable to the positions where the application of an adhesive is difficult and provides filling and sealing in between panels.
[Best Mode]
The present invention relates to a high-strength adhesive composition comprising a resin, a latent curing agent, fatty acid-coated fumed silica, a moisture absorbent, a coloring agent, a processing aid and a filler, wherein the resin comprises 5-10 wt% of a trimethylolpropane-modified epoxy resin, 15-25 wt% of a nitrile butadiene rubber (NBR)-modified epoxy resin, 10-20 wt% of a bisphenol F type epoxy resin, 3-8 wt% of a carboxy terminated butadiene acrylonitrile copolymer (CTBN)-modified epoxy resin and 3-8 wt% of a dimer- modified epoxy resin, wherein the latent curing agent is contained in the amount of 6-10 wt%, the fatty acid-coated fumed silica is contained in the amount of 6-10 wt%, the moisture absorbent is contained in the amount of 3-5 wt%, the coloring agent is contained in the amount of 1-3 wt%, the processing aid is contained in the amount of 3-8 wt% and the filler is contained in the amount of 10-20 wt%.
Hereunder is given a more detailed description of the present invention. The present invention relates to a high-strength adhesive composition comprising a resin, a latent curing agent, fumed silica, a moisture absorbent, a coloring agent, a processing aid and a filler, wherein the resin comprises a trimethylolpropane-modified epoxy resin, a nitrile butadiene rubber (NBR)- modified epoxy resin, a bisphenol F type epoxy resin, a carboxy terminated butadiene acrylonitrile copolymer (CTBN)-modified epoxy resin and a dimer- modified epoxy resin. When applied between vehicle panels, the high-strength adhesive composition offers a superior strength enough to replace welding as it is cured while the vehicle passes through an auto-painting oven, with superior strength and durability. Further, it is applicable to various gaps and positions and provides adhesion and filling of panels.
Hereunder is given a detailed description of each constituent of the high- strength adhesive composition of the present invention.
The trimethylolpropane-modified epoxy resin used in the present invention is a material that offers good adhesion to various vehicle panels and is used in the amount of 5-10 wt%. If it is used less than 5 wt%, adhesion to panels may become weak. In contrast, if it is used more than 10 wt%, hardness increases and flowability becomes poor.
The nitrile butadiene rubber (NBR)-modified epoxy resin used in the present invention improves adhesion to vehicle panels and further improves strength through the cohesive failure effect after the composition is cured. It is used in 15-25 wt%. If it is used less than 15 wt%, adhesion to panels becomes weak. In contrast, if it is used more than25 wt%, there may be a negative effect in processability and processability.
The bisphenol F type epoxy resin used in the present invention provides strength comparable to that of a metal after curing and further improves curing. It is used in the amount of 10-20 wt%. If it is used less than 10 wt%, strength decreases. In contrast, if it is used more than 20 wt%, processability becomes poor because of increased penetration index and failure or cracking may occur in the cured composition by external impact. The carboxy terminated butadiene acrylonitrile copolymer (CTBN)-modified epoxy resin used in the present invention has improved adhesion and attachment property with a rust preventive oil-coated plate. It is generally used in the amount of 3-8 wt %. If it is used less than 3 wt%, adhesion to a rust preventive oil-coated surface decreases. In contrast, if it is used more than 8 wt%, adhesion strength decreases thus increasing cost.
The dimer-modified epoxy resin used in the present invention improves adhesion strength to panels and is used in 3-8 wt%. If it is used less than 3 wt%, adhesion strength decreases. In contrast, if it is used more than 8 wt%, a panel deformation may occur. The latent curing agent used in the present invention improves strength by providing a different currying system and is used in 6-10 wt%. If it is used less than 6 wt%, strength decreases. In contrast, if it is used more thanlO wt%, storage stability becomes poor. As a latent curing agent, it is preferred to use dicyandiamide.
The fumed silica used in the present invention provides outstanding oil absorption and fluidity since the breakup of fine foams does not occur during the mixing of the composition and is used in 6-10 wt%. If it is used less than 6 wt%, flowing may occur. In contrast, if it is used more thanlO wt%, productivity becomes poor because of low specific gravity.
The moisture absorbent used in the present invention removes moisture from the product and is used in the amount of 3-5 wt%. If it is used less than 3 wt%, moisture removal is insufficient and pot stability is inadequate. In contrast, if it is used more than 5 wt%, hardness of the product will increase. As a moisture absorbent, it is preferred to use calcium oxide.
The coloring agent used in the present invention provides color to the product and is used in the amount of 3-8 wt%. If it is used less than 3 wt%, a wanted color may not be attained. In contrast, if it is used more than 8 wt%, dispersibility will become poor due to increased oil absorption. As a coloring agent, it is preferred to use carbon black.
The processing aid used in the present invention improves processability and enhances adhesion. It is generally used in the amount of 3-8 wt%. If it is used less than 3 wt%, improvement of processability will become negligible. In contrast, if it is used more than 8 wt%, strength will decrease. As a processing aid, it is preferred to use a polyvinyl chloride resin.
The filler used in the present invention controls the volume of the final product and is used in 10-20 wt%. If it is used less than 10 wt%, it will be difficult to control volume. In contrast, if it is used more than 20 wt%, specific gravity will increase while strength will decrease. As a filler, it is preferred to use calcium carbonate.
In addition to the aforementioned constituents, a curing promoter or other constituents may be further used in the present invention. The high-strength adhesive composition of the present invention may be prepared by using a conventional method in the art without any limitation.
First, all the powdery components are uniformly dispersed using a kneader and a high-speed disperser. Then, liquid resins are added and dispersed, while removing moisture and foams from the product under the vacuum condition. The resulting compound is extruded with a wanted size using an extruder.
[Mode for Invention]
The following examples further illustrate the present invention. However, it will be understood that the present invention is not limited by the following examples. Examples 1-5 and Comparative Examples 1-5
High-strength adhesive compositions were prepared as presented in Tables 1 and 2 below. Test was performed as described in the Experimental Example section below and the result is given in Table 3. [Table 1]
Figure imgf000009_0001
[Table 2]
Figure imgf000010_0001
Experimental Example
1. Specific gravity: MS 700-32, 4-2.
2. Fluidity: MS 700-32, 4-10.
3. Adhesion strength: MS 715-06, 4-2.
4. T-peel strength: MS 715-06, 4-5.
5. Contamination of pretreatment solution: MS 700-32, 4-16. [Table 3]
Figure imgf000011_0001
In conclusion, as shown in Table 3, the compositions of Examples 1-5 were significantly superior in adhesion strength and peel strength to those of Comparative Examples 1-5.
[Industrial Applicability]
As described above, when applied in between vehicle panels, the high-strength adhesive composition in the form of a tape of the present invention offers a strength enough to be able to reduce or replace welding as it is cured while the vehicle passes through an auto-painting oven, with superior strength and durability. Further, it is applicable to various gaps and positions without a special apparatus. It prevents the deformation of shape caused by the pressing of the panels during the assembly process. In addition, it provides superior processability and good filling and sealing. Since applicable to various positions, including flat, curved and vertical sites, it improves durability and collision performance of vehicles, while supporting various designs.
It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit and scope of the invention. Other embodiments of the invention will be apparent to those skilled in the art from consideration of the specification and practice of the invention disclosed herein. It is intended that the specification and examples be considered as exemplary only, with the true scope and spirit of the invention being indicated by the following claims.

Claims

[CLAIMS]
[Claim 1]
A high-strength adhesive composition comprising a resin, a latent curing agent, fatty acid-coated fumed silica, a moisture absorbent, a coloring agent, a processing aid and a filler, wherein the resin comprises 5-10 wt% of a trimethylolpropane-modified epoxy resin, 15-25 wt% of a nitrile butadiene rubber (NBR)-modified epoxy resin, 10-20 wt% of a bisphenol F type epoxy resin, 3-8 wt% of a carboxy terminated butadiene acrylonitrile copolymer (CTBN)-modified epoxy resin and 3-8 wt% of a dimer- modified epoxy resin, wherein the latent curing agent is contained in the amount of 6-10 wt%, the fatty acid-coated fumed silica is contained in the amount of 6-10 wt%, the moisture absorbent is contained in the amount of 3-5 wt%, the coloring agent is contained in the amount of 1-3 wt%, the processing aid is contained in the amount of 3-8 wt% and the filler is contained in the amount of 10-20 wt% .
PCT/KR2007/004308 2006-09-07 2007-09-06 High-strength adhesive composition WO2008030049A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR10-2006-0086116 2006-09-07
KR1020060086116A KR100838346B1 (en) 2006-09-07 2006-09-07 Composition for high powerful adhesive

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WO2008030049A1 true WO2008030049A1 (en) 2008-03-13

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115160966A (en) * 2022-08-08 2022-10-11 山东北方现代化学工业有限公司 High-strength weather-resistant automobile structure adhesive and preparation method thereof

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101258406B1 (en) * 2010-12-29 2013-04-26 주식회사 성우하이텍 Structure adhesive pad of sticker type
KR20160060480A (en) * 2014-11-20 2016-05-30 욱성화학주식회사 Adhesive composition for structure, and preparing method thereof

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